ListView

API Reference: UI.ListView

ListView is a View that displays given items as a one-column vertical list. Interaction with each item in the list is possible.

Return Value of onRowType

• If ListViewItem's are created from UI Editor, you shouldn't be returning 0 in onRowType method.

Callback Functions

• Define your Listview calback functions before Page.onShow

• You can define them in Page.onLoad

Usage of ListView

There are two ways to use ListView on Smartface

• Create the component skeleton in code, like creating your elements in Javascript
• [Recommended] Using Smartface UI Editor to create component skeleton and reuse it.

For more information about the difference of two, refer to the document below:

Using UI Editor and Classes

info

For ease of showcase, the code examples here creates the necessary components directly from code. Smartface recommends to use Smartface UI Editor to use ListView. More information is located at the document below:

Using ListView and ListViewItem from Code

info

This method is not recommended when using 1 type of ListViewItem.

It is possible to create your ListView and ListViewItem using Page code. For this approach, you should use UI.ListView.onRowCreate method to create your layouts and UI.ListView.onRowBind to assign your data.

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import Application from "@smartface/native/application";
import { Route, Router } from "@smartface/router";
import {
  styleableContainerComponentMixin,
  styleableComponentMixin,
} from "@smartface/styling-context";
import Label from "@smartface/native/ui/label";
import Color from "@smartface/native/ui/color";
import ListView from "@smartface/native/ui/listview";
import Font from "@smartface/native/ui/font";
import ListViewItem from "@smartface/native/ui/listviewitem";
import TextAlignment from "@smartface/native/ui/shared/textalignment";
import System from "@smartface/native/device/system";

class StyleableListView extends styleableComponentMixin(ListView) {}
class StyleableLabel extends styleableComponentMixin(Label) {}
class StyleableListViewItem extends styleableContainerComponentMixin(
  ListViewItem
) {}

type DatasetType = { title: String; backgroundColor: string };
const COLORS: string[] = [
  "#ffffff",
  "#e6f7ff",
  "#cceeff",
  "#b3e6ff",
  "#99ddff",
  "#80d4ff",
  "#66ccff",
  "#4dc3ff",
  "#33bbff",
  "#1ab2ff",
  "#00aaff",
  "#0099e6",
  "#0088cc",
  "#0077b3",
  "#006699",
];

//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
  myListView: StyleableListView;
  index: number = 0;
  myDataSet: DatasetType[] = Array.from({ length: 10 }).map(
    (_, index: number) => ({
      title: `Smartface Title ${index}`,
      backgroundColor: COLORS[index],
    })
  );
  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  // The page design has been made from the code for better
  // showcase purposes. As a best practice, remove this and
  // use WYSIWYG editor to style your pages.
  centerizeTheChildrenLayout() {
    this.style.apply({
      flexProps: {
        flexDirection: "ROW",
        justifyContent: "CENTER",
        alignItems: "CENTER",
      },
      paddingTop: 0,
      paddingLeft: 0,
      paddingBottom: 0,
      paddingRight: 0,
    });
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    Application.statusBar.visible = false;
    headerBar.visible = false;
  }

  onLoad() {
    super.onLoad();
    this.centerizeTheChildrenLayout();

    const { myDataSet } = this;

    this.myListView = new StyleableListView({
      itemCount: myDataSet.length,
    });

    this.myListView.onRowCreate = () => {
      let myListViewItem = new StyleableListViewItem();
      let myLabelTitle = new StyleableLabel();
      myLabelTitle.font = Font.create(Font.DEFAULT, 15, Font.BOLD);
      myLabelTitle.textAlignment = TextAlignment.MIDCENTER;
      myLabelTitle.textColor = Color.WHITE;
      myLabelTitle.borderRadius = 10;
      this.myListView.dispatch({
        type: "addChild",
        component: myListViewItem,
        name: `listViewItem${++this.index}`,
      });
      myListViewItem.addChild(
        myLabelTitle,
        `myLabelTitle${this.index}`,
        ".listViewItem",
        {
          marginTop: 10,
          marginBottom: 10,
          marginLeft: 50,
          marginRight: 50,
          width: null,
          flexProps: {
            flexGrow: 1,
          },
        }
      );
      //@ts-ignore
      myListViewItem.myLabelTitle = myLabelTitle;
      return myListViewItem;
    };
    this.myListView.onRowBind = (listViewItem, index) => {
      // @ts-ignore
      let myLabelTitle = listViewItem.myLabelTitle;
      myLabelTitle.text = myDataSet[index].title;
      myLabelTitle.backgroundColor = Color.create(
        `${myDataSet[index].backgroundColor}`
      );
    };
    this.myListView.onRowSelected = (listViewItem, index) => {
      console.log("selected index = " + index);
    };

    this.myListView.onPullRefresh = () => {
      myDataSet.push({
        title: "Smartface Title " + myDataSet.length,
        backgroundColor: "#FF0000",
      });
      this.myListView.itemCount = myDataSet.length;
      this.myListView.refreshData();
      this.myListView.stopRefresh();
    };

    this.addChild(this.myListView, "myListView", ".listView", {
      height: 350,
      rowHeight: 70,
    });
  }
}

Scrolling to a ListViewItem Programmatically

API Reference: scrollTo

info

When using scrollTo method, you should check if ListView has enough data in it.

this.data = [{ text: "Smartface" }];
/**
 * This may cause unexpected behavior since the listView doesn't have
 enough length to scroll to.
*/
this.listView1.scrollTo(3);

// You should do it like this
if (this.data.length > 3) {
  this.listView1.scrollTo(3);
}

Sample ListView Implementations

info

For ease of showcase, the code examples here creates the necessary components directly from code. Smartface recommends to use Smartface UI Editor to use ListView. More information is located at the document below:

Using ListView with UI Editor

Using Multiple ListViewItem's

For multiple ListViewItems, you cannot use Smartface UI Editor to drag\&drop your ListViewItem elements. You should specify which elements to choose from code. However, you can create your skeleton component from UI Editor and reference it by importing it.

import LviElements from "components/LviElements";
import LviItems from "components/LviItems";

// ...your page code.
this.listViewItemIndex = 0; // Initialize this in constructor
this.listView1.onRowCreate = (type) => {
  let listViewItem = type === 0 ? new LviElements() : new LviItems();
  this.listView1.dispatch({
    type: "addChild",
    component: listViewItem,
    name: `myListViewItem${++this.listViewItemIndex}`,
  });
  // ...other necessary logic
  return listViewItem;
};

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import { Route, Router } from "@smartface/router";
import {
  styleableContainerComponentMixin,
  styleableComponentMixin,
} from "@smartface/styling-context";
import Label from "@smartface/native/ui/label";
import Color from "@smartface/native/ui/color";
import Font from "@smartface/native/ui/font";
import ListViewItem from "@smartface/native/ui/listviewitem";
import ListView from "@smartface/native/ui/listview";
import System from "@smartface/native/device/system";
import Application from "@smartface/native/application";

class StyleableLabel extends styleableComponentMixin(Label) {}
class StyleableListViewItem extends styleableContainerComponentMixin(
  ListViewItem
) {}
class StyleableListView extends styleableComponentMixin(ListView) {}

type RowDataType = string[][];
type DataType = { isHeader: boolean; data: string };

//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
  myListView: StyleableListView;
  index: number = 0;
  headerData: string[] = [
    "Complementary",
    "Analogous",
    "Tetradic",
    "Monochromatic",
  ];
  rowData: string[][] = [
    ["#ffb8c9", "#b8ffee"],
    ["#ffb8ed", "#ffb8c9", "#ffcbb8"],
    ["#eeb8ff", "#ffb8c9", "#c9ffb8", "#b8ffee"],
    ["#ff6c8f", "#ff85a2", "#ff9fb6", "#ffb8c9", "#ffd2dc", "#ffebf0"],
  ];
  dataArray: DataType[] = [];

  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  pushDataToArray(headerData: string[], rowData: RowDataType) {
    for (var i = 0; i < headerData.length; i++) {
      this.dataArray.push({ isHeader: true, data: headerData[i] });
      for (var j = 0; j < rowData[i].length; j++) {
        this.dataArray.push({ isHeader: false, data: rowData[i][j] });
      }
    }
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    Application.statusBar.visible = false;
    headerBar.visible = false;
  }

  onLoad() {
    super.onLoad();

    this.pushDataToArray(this.headerData, this.rowData);

    const { dataArray } = this;
    this.myListView = new StyleableListView({
      itemCount: dataArray.length,
    });

    this.myListView.onRowCreate = (type) => {
      let myListViewItem = new StyleableListViewItem();
      this.myListView.dispatch({
        type: "addChild",
        component: myListViewItem,
        name: `myListViewItem${++this.index}`,
      });
      if (type == 1) {
        let myLabelTitle = new StyleableLabel();
        myListViewItem.addChild(
          myLabelTitle,
          `myLabelTitle${this.index}`,
          ".sf-label",
          {
            flexProps: {
              flexGrow: 1,
            },
            textAlignment: "MIDCENTER",
            borderRadius: 10,
            margin: 10,
          }
        );
        myListViewItem["myLabelTitle"] = myLabelTitle;
      } else {
        // Header
        let myLabelTitle = new Label();
        myLabelTitle.font = Font.create(Font.DEFAULT, 30, Font.BOLD);
        myLabelTitle.backgroundColor = Color.WHITE;
        myListViewItem.addChild(
          myLabelTitle,
          `myLabelTitle${this.index}`,
          ".sf-label",
          {
            flexProps: {
              flexGrow: 1,
            },
            borderRadius: 10,
            margin: 10,
            font: {
              size: 30,
              bold: true,
              family: "SFProText",
              style: "Semibold",
            },
          }
        );
        myListViewItem["myLabelTitle"] = myLabelTitle;
      }
      return myListViewItem;
    };

    this.myListView.onRowHeight = function (index) {
      if (dataArray[index].isHeader) {
        return 100;
      }
      return 70;
    };

    this.myListView.onRowBind = function (
      listViewItem: ListViewItem & { myLabelTitle: Label },
      index
    ) {
      const { myLabelTitle } = listViewItem;

      if (dataArray[index].isHeader) {
        myLabelTitle.text = dataArray[index].data;
      } else {
        myLabelTitle.backgroundColor = Color.create(dataArray[index].data);
        myLabelTitle.text = dataArray[index].data;
      }
    };

    this.myListView.onRowType = function (index) {
      if (dataArray[index].isHeader) {
        return 2;
      } else {
        return 1;
      }
    };

    this.myListView.onPullRefresh = () => {
      let header = ["Triadic"];
      let row = [["#b8c9ff", "#ffb8c9", "#c9ffb8"]];
      this.pushDataToArray(header, row);
      this.myListView.itemCount = dataArray.length;
      this.myListView.refreshData();
      this.myListView.stopRefresh();
    };
    this.addChild(this.myListView, "myListView", ".sf-listView", {
      width: null,
      height: null,
      flexGrow: 1,
      marginLeft: 20,
      marginRight: 20,
      marginTop: 50,
      marginBottom: 50,
    });
    this.style.apply({
      paddingTop: 0,
      paddingLeft: 0,
      paddingBottom: 0,
      paddingRight: 0,
    });
  }
}

Lazy Loading (Pagination)

Lazy loading of ListView is easy on Smartface Native Framework. It is possible with:

• onScroll event
• onRowBind event

danger

Please note that onScroll event will be fired while user scrolling the ListView. This means while you downloading your content for lazy loading, onScroll event will continue to firing. You should check that. We recommend to use onRowBind for lazy loading to get over from this problem.

Lazy Loading Using onRowBind (recommended)

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import System from "@smartface/native/device/system";
import Application from "@smartface/native/application";
import { Route, Router } from "@smartface/router";
import {
  styleableContainerComponentMixin,
  styleableComponentMixin,
} from "@smartface/styling-context";
import Label from "@smartface/native/ui/label";
import Color from "@smartface/native/ui/color";
import ListView from "@smartface/native/ui/listview";
import ListViewItem from "@smartface/native/ui/listviewitem";
import Timer from "@smartface/native/global/timer";
import ActivityIndicator from "@smartface/native/ui/activityindicator";
import FlexLayout from "@smartface/native/ui/flexlayout";

class StyleableListView extends styleableComponentMixin(ListView) {}
class StyleableLabel extends styleableComponentMixin(Label) {}
class StyleableActivityIndicator extends styleableComponentMixin(
  ActivityIndicator
) {}
class StyleableListViewItem extends styleableContainerComponentMixin(
  ListViewItem
) {}
class StyleableFlexLayout extends styleableContainerComponentMixin(
  FlexLayout
) {}

type DatasetType = {
  title: String;
  subtitle?: String;
};

//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
  myListView: StyleableListView;
  index: number = 0;
  isLoading: boolean = false;
  myDataSet: DatasetType[] = Array.from({ length: 10 }).map(
    (_, index: number) => ({
      title: `Smartface Title ${index}`,
      subtitle: `Smartface Subtitle ${index}`,
    })
  );
  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  pushMoreToDataset(count: number): void {
    for (let i = 0; i < count; i++) {
      this.myDataSet.push({
        title: "Smartface Title " + (this.myDataSet.length + 1),
        subtitle: "Smartface Subitle " + (this.myDataSet.length + 1),
      });
    }
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    Application.statusBar.visible = false;
    headerBar.visible = false;
  }

  onLoad() {
    super.onLoad();

    let { myDataSet, isLoading } = this;

    this.myListView = new StyleableListView({
      itemCount: myDataSet.length + 1,
      onRowCreate: (type) => {
        let myListViewItem = new StyleableListViewItem();
        this.myListView.dispatch({
          type: "addChild",
          component: myListViewItem,
          name: `myListViewItem${++this.index}`,
          classNames: ".listViewItem",
          userStyle: {
            paddingTop: 5,
            paddingBottom: 5,
          },
        });

        if (type == 2) {
          // Loading
          let loadingIndicator = new StyleableActivityIndicator();
          //@ts-ignore
          myListViewItem.loadingIndicator = loadingIndicator;
          //@ts-ignore
          myListViewItem.addChild(
            loadingIndicator,
            `loadingIndicator${this.index}`,
            ".activityIndicator",
            {
              width: 35,
              height: 35,
              color: "#008000",
              flexProps: {
                positionType: "ABSOLUTE",
              },
            }
          );

          //@ts-ignore
          myListViewItem.style.apply({
            flexProps: {
              justifyContent: "CENTER",
              alignItems: "CENTER",
            },
          });
        } else {
          let titleLayout = new StyleableFlexLayout();
          let titleLabel = new StyleableLabel();
          let subtitleLabel = new StyleableLabel();

          //@ts-ignore
          myListViewItem.addChild(
            titleLayout,
            `titleLayout${this.index}`,
            ".flexLayout",
            {
              flexGrow: 1,
              backgroundColor: "#00A1F1",
            }
          );

          //@ts-ignore
          titleLayout.addChild(
            titleLabel,
            `titleLabel${this.index}`,
            ".label",
            {
              textAlignment: "MIDCENTER",
              flexGrow: 1,
              textColor: "#FFFFFF",
            }
          );
          //@ts-ignore
          titleLayout.titleLabel = titleLabel;

          //@ts-ignore
          titleLayout.addChild(
            subtitleLabel,
            `subtitleLabel${this.index}`,
            ".label",
            {
              textAlignment: "MIDCENTER",
              flexGrow: 1,
              textColor: "#FFFFFF",
            }
          );
          //@ts-ignore
          titleLayout.subtitleLabel = subtitleLabel;

          //@ts-ignore
          myListViewItem.titleLayout = titleLayout;
        }

        return myListViewItem;
      },
      onRowBind: (listViewItem, index) => {
        if (index === myDataSet.length) {
          //@ts-ignore
          listViewItem.loadingIndicator.visible = true;
        } else {
          //@ts-ignore
          listViewItem.titleLayout.titleLabel.text =
            myDataSet[index % myDataSet.length].title;
          //@ts-ignore
          listViewItem.titleLayout.subtitleLabel.text =
            myDataSet[index % myDataSet.length].subtitle;
        }

        if (index > myDataSet.length - 3 && !isLoading) {
          isLoading = true;
          Timer.setTimeout({
            task: () => {
              // Loading completed
              this.pushMoreToDataset(10);
              this.myListView.itemCount = myDataSet.length + 1;
              this.myListView.refreshData();
              isLoading = false;
            },
            delay: 1500,
          });
        }
      },
      onPullRefresh: () => {
        this.pushMoreToDataset(1);
        this.myListView.itemCount = myDataSet.length + 1;
        this.myListView.refreshData();
        this.myListView.stopRefresh();
      },
      onRowType: (index) => {
        if (myDataSet.length === index) {
          // Loading
          return 2;
        } else {
          return 1;
        }
      },
    });

    this.addChild(this.myListView, "myListView", ".listView", {
      rowHeight: 100,
      alignSelf: "CENTER",
      width: null,
      height: null,
      flexGrow: 1,
      marginLeft: 75,
      marginRight: 75,
      marginTop: 100,
      marginBottom: 100,
    });

    this.style.apply({
      paddingTop: 0,
      paddingLeft: 0,
      paddingBottom: 0,
      paddingRight: 0,
      flexProps: {
        justifyContent: "CENTER",
      },
    });
  }
}

Lazy Loading Using onScroll

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import Application from "@smartface/native/application";
import { Route, Router } from "@smartface/router";
import {
  styleableContainerComponentMixin,
  styleableComponentMixin,
} from "@smartface/styling-context";
import Label from "@smartface/native/ui/label";
import ListView from "@smartface/native/ui/listview";
import ListViewItem from "@smartface/native/ui/listviewitem";
import ActivityIndicator from "@smartface/native/ui/activityindicator";
import FlexLayout from "@smartface/native/ui/flexlayout";
import System from "@smartface/native/device/system";

class StyleableListView extends styleableComponentMixin(ListView) {}
class StyleableLabel extends styleableComponentMixin(Label) {}
class StyleableActivityIndicator extends styleableComponentMixin(
  ActivityIndicator
) {}
class StyleableListViewItem extends styleableContainerComponentMixin(
  ListViewItem
) {}
class StyleableFlexLayout extends styleableContainerComponentMixin(
  FlexLayout
) {}

type DatasetType = {
  title: String;
  subtitle?: String;
};

//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
  myListView: StyleableListView;
  index: number = 0;
  isLoading: boolean = false;
  myDataSet: DatasetType[] = Array.from({ length: 10 }).map(
    (_, index: number) => ({
      title: `Smartface Title ${index}`,
      subtitle: `Smartface Subtitle ${index}`,
    })
  );

  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  pushMoreToDataset(count: number): void {
    for (let i = 0; i < count; i++) {
      this.myDataSet.push({
        title: "Smartface Title " + (this.myDataSet.length + 1),
        subtitle: "Smartface Subitle " + (this.myDataSet.length + 1),
      });
    }
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    Application.statusBar.visible = false;
    headerBar.visible = false;
  }

  onLoad() {
    super.onLoad();

    let { myDataSet } = this;

    this.myListView = new StyleableListView({
      itemCount: myDataSet.length + 1,
      onRowCreate: (type) => {
        let myListViewItem = new StyleableListViewItem();
        this.myListView.dispatch({
          type: "addChild",
          component: myListViewItem,
          name: `myListViewItem${++this.index}`,
          classNames: ".listViewItem",
          userStyle: {
            paddingTop: 5,
            paddingBottom: 5,
          },
        });
        if (type == 2) {
          // Loading
          let loadingIndicator = new StyleableActivityIndicator();
          //@ts-ignore
          myListViewItem.loadingIndicator = loadingIndicator;
          //@ts-ignore
          myListViewItem.addChild(
            loadingIndicator,
            `loadingIndicator${this.index}`,
            ".activityIndicator",
            {
              width: 35,
              height: 35,
              color: "#008000",
              flexProps: {
                positionType: "ABSOLUTE",
              },
            }
          );

          //@ts-ignore
          myListViewItem.dispatch({
            type: "updateUserStyle",
            userStyle: {
              flexProps: {
                justifyContent: "CENTER",
                alignItems: "CENTER",
              },
            },
          });
        } else {
          let titleLayout = new StyleableFlexLayout();
          let titleLabel = new StyleableLabel();
          let subtitleLabel = new StyleableLabel();

          //@ts-ignore
          myListViewItem.addChild(
            titleLayout,
            `titleLayout${this.index}`,
            ".flexLayout",
            {
              flexGrow: 1,
              backgroundColor: "#00A1F1",
            }
          );

          //@ts-ignore
          titleLayout.addChild(
            titleLabel,
            `titleLabel${this.index}`,
            ".label",
            {
              textAlignment: "MIDCENTER",
              flexGrow: 1,
              textColor: "#FFFFFF",
            }
          );
          //@ts-ignore
          titleLayout.titleLabel = titleLabel;

          //@ts-ignore
          titleLayout.addChild(
            subtitleLabel,
            `subtitleLabel${this.index}`,
            ".label",
            {
              textAlignment: "MIDCENTER",
              flexGrow: 1,
              textColor: "#FFFFFF",
            }
          );
          //@ts-ignore
          titleLayout.subtitleLabel = subtitleLabel;

          //@ts-ignore
          myListViewItem.titleLayout = titleLayout;
        }

        return myListViewItem;
      },
      onRowBind: (listViewItem, index) => {
        if (index === myDataSet.length) {
          //@ts-ignore
          listViewItem.loadingIndicator.visible = true;
        } else {
          //@ts-ignore
          listViewItem.titleLayout.titleLabel.text =
            myDataSet[index % myDataSet.length].title;
          //@ts-ignore
          listViewItem.titleLayout.subtitleLabel.text =
            myDataSet[index % myDataSet.length].subtitle;
        }
      },
      onPullRefresh: () => {
        this.pushMoreToDataset(1);
        this.myListView.itemCount = myDataSet.length + 1;
        this.myListView.refreshData();
        this.myListView.stopRefresh();
      },
      onRowType: (index) => {
        if (myDataSet.length === index) {
          // Loading
          return 2;
        } else {
          return 1;
        }
      },
      onScroll: () => {
        if (
          this.myListView.getLastVisibleIndex() > myDataSet.length - 3 &&
          !this.isLoading
        ) {
          // Simulate loading like downloading internet.
          this.isLoading = true;
          setTimeout(() => {
            console.log(" myListView onScroll loading 11");
            // Loading completed
            this.pushMoreToDataset(10);
            this.myListView.itemCount = myDataSet.length + 1;
            this.myListView.refreshData();
            this.isLoading = false;
          }, 1500);
        }
      },
    });

    this.addChild(this.myListView, "myListView", ".listView", {
      rowHeight: 100,
      alignSelf: "CENTER",
      width: null,
      height: null,
      flexGrow: 1,
      marginLeft: 75,
      marginRight: 75,
      marginTop: 100,
      marginBottom: 100,
    });
    this.style.apply({
      paddingTop: 0,
      paddingLeft: 0,
      paddingBottom: 0,
      paddingRight: 0,
      flexProps: {
        justifyContent: "CENTER",
      },
    });
  }
}

Sticky Items

Some components within the page will appear constantly at the bottom of the page. As the user scrolls down, those items will remain within the same absolute position.

This is a simple example of Sticky Items made with ListView and FlexLayout.

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import Application from "@smartface/native/application";
import { Route, Router } from "@smartface/router";
import {
  styleableContainerComponentMixin,
  styleableComponentMixin,
} from "@smartface/styling-context";
import Label from "@smartface/native/ui/label";
import Color from "@smartface/native/ui/color";
import ListView from "@smartface/native/ui/listview";
import ListViewItem from "@smartface/native/ui/listviewitem";
import FlexLayout from "@smartface/native/ui/flexlayout";
import System from "@smartface/native/device/system";

class StyleableListView extends styleableComponentMixin(ListView) {}
class StyleableLabel extends styleableComponentMixin(Label) {}
class StyleableListViewItem extends styleableContainerComponentMixin(
  ListViewItem
) {}
class StyleableFlexLayout extends styleableContainerComponentMixin(
  FlexLayout
) {}

type RowDataType = Array<Array<string>>;
type DataType = { isHeader: boolean; data: string };

//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
  myListView: StyleableListView;
  index: number = 0;
  headerData: string[] = [
    "Complementary",
    "Analogous",
    "Tetradic",
    "Monochromatic",
  ];
  rowData: Array<Array<string>> = [
    ["#ffb8c9", "#b8ffee"],
    ["#ffb8ed", "#ffb8c9", "#ffcbb8"],
    ["#eeb8ff", "#ffb8c9", "#c9ffb8", "#b8ffee"],
    ["#ff6c8f", "#ff85a2", "#ff9fb6", "#ffb8c9", "#ffd2dc", "#ffebf0"],
  ];
  dataArray: DataType[] = this.pushDataToArray(this.headerData, this.rowData);

  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  pushDataToArray(headerData: string[], rowData: RowDataType): DataType[] {
    let dataArray: DataType[] = new Array<DataType>();
    for (var i = 0; i < headerData.length; i++) {
      dataArray.push({ isHeader: true, data: headerData[i] });
      for (var j = 0; j < rowData[i].length; j++) {
        dataArray.push({ isHeader: false, data: rowData[i][j] });
      }
    }
    return dataArray;
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    Application.statusBar.visible = false;
    headerBar.visible = false;
  }

  onLoad() {
    super.onLoad();

    const { dataArray } = this;

    this.myListView = new StyleableListView({
      itemCount: dataArray.length,
      refreshEnabled: false,
      marginTop: 70,
    });

    this.myListView.onRowCreate = (type: number) => {
      let myListViewItem = new StyleableListViewItem();
      this.myListView.dispatch({
        type: "addChild",
        component: myListViewItem,
        name: `myListViewItem${++this.index}`,
      });
      if (type == 1) {
        let myLabelTitle = new StyleableLabel();
        //@ts-ignore
        myListViewItem.addChild(
          myLabelTitle,
          `myLabelTitle${this.index}`,
          ".label",
          {
            flexProps: {
              flexGrow: 1,
            },
            textAlignment: "MIDCENTER",
            borderRadius: 10,
            margin: 10,
          }
        );
        //@ts-ignore
        myListViewItem.myLabelTitle = myLabelTitle;
      } else {
        // Header
        let myLabelTitle = new StyleableLabel();
        //@ts-ignore
        myListViewItem.addChild(
          myLabelTitle,
          `myLabelTitle${this.index}`,
          ".label",
          {
            flexProps: {
              flexGrow: 1,
            },
            borderRadius: 10,
            margin: 10,
            backgroundColor: "#FFFFFF",
            font: {
              size: 30,
              bold: true,
              family: "SFProText",
              style: "Semibold",
            },
          }
        );
        //@ts-ignore
        myListViewItem.myLabelTitle = myLabelTitle;
      }
      return myListViewItem;
    };

    this.myListView.onRowHeight = function (index: number) {
      if (dataArray[index].isHeader) {
        return 100;
      }
      return 70;
    };

    this.myListView.onRowBind = function (listViewItem: any, index: number) {
      const { myLabelTitle } = listViewItem;

      if (dataArray[index].isHeader) {
        myLabelTitle.text = dataArray[index].data;
      } else {
        myLabelTitle.backgroundColor = Color.create(dataArray[index].data);
        myLabelTitle.text = dataArray[index].data;
      }
    };

    this.myListView.onRowType = (index: number): number => {
      if (dataArray[index].isHeader) {
        return 2;
      } else {
        return 1;
      }
    };

    this.myListView.onScroll = (params: any): void => {
      if (params.contentOffset.y >= 240) {
        headerSticky.visible = true;
      } else {
        headerSticky.visible = false;
      }

      if (params.contentOffset.y + this.myListView.height >= 1030) {
        footerSticky.visible = false;
      } else {
        footerSticky.visible = true;
      }
    };

    this.addChild(this.myListView, "myListView", ".listView", {
      width: null,
      height: null,
      flexGrow: 1,
      marginLeft: 20,
      marginRight: 20,
    });

    let headerSticky = new StyleableFlexLayout();

    this.addChild(headerSticky, "headerSticky", ".flexlayout", {
      visible: false,
      height: 100,
      left: 0,
      right: 0,
      top: 0,
      positionType: "ABSOLUTE",
      marginTop: 70,
    });

    let myLabelTitle = new StyleableLabel({
      text: "Analogous",
    });

    //@ts-ignore
    headerSticky.addChild(myLabelTitle, "myLabelTitle", ".label", {
      flexGrow: 1,
      marginLeft: 30,
      marginRight: 10,
      font: {
        size: 30,
        bold: true,
        family: "SFProText",
        style: "Semibold",
      },
      backgroundColor: "#FFFFFF",
    });

    let footerSticky = new StyleableFlexLayout();
    this.addChild(footerSticky, "footerSticky", ".flexlayout", {
      visible: true,
      height: 100,
      left: 0,
      right: 0,
      bottom: 0,
      positionType: "ABSOLUTE",
    });

    let myLabelTitle2 = new Label({
      text: "Monochromatic",
    });

    //@ts-ignore
    footerSticky.addChild(myLabelTitle2, "myLabelTitle2", ".label", {
      flexGrow: 1,
      marginLeft: 30,
      marginRight: 10,
      font: {
        size: 30,
        bold: true,
        family: "SFProText",
        style: "Semibold",
      },
      backgroundColor: "#FFFFFF",
    });
    this.style.apply({
      marginTop: 0,
      paddingTop: 0,
      paddingLeft: 0,
      paddingBottom: 0,
      paddingRight: 0,
    });
  }
}

The ListViewItem with Monochromatic text is a Sticky View.

Right and Left Swipe List Items

This is a simple example of creating a swipe items in ListView.

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

Page Code

import Page1Design from "generated/pages/page1";
import { Route, Router } from "@smartface/router";
import { withDismissAndBackButton } from "@smartface/mixins";
import MyListViewItem from "components/MyListViewItem";
import ListView from "@smartface/native/ui/listview";
import { themeService } from "theme";

type DatasetType = { title: string };
export default class Page1 extends withDismissAndBackButton(Page1Design) {
  private disposeables: (() => void)[] = [];
  myDataSet: DatasetType[] = Array.from({ length: 10 }).map(
    (_, index: number) => ({
      title: `Smartface Title ${index}`,
    })
  );
  constructor(private router?: Router, private route?: Route) {
    super({});
  }
  deleteAndRefresh(e: { index: number }): void {
    this.myDataSet.splice(e.index, 1);
    this.myListView.itemCount = this.myDataSet.length;
    this.myListView.deleteRowRange({
      itemCount: 1,
      positionStart: e.index,
      ios: {
        animation: ListView.iOS.RowAnimation.FADE,
      },
    });
    this.myListView.refreshRowRange({
      itemCount: 1,
      positionStart: this.myDataSet.length - 1,
    });
  }
  /**
   * @event onShow
   * This event is called when a page appears on the screen (everytime).
   */
  onShow() {
    super.onShow();
    this.myListView.itemCount = this.myDataSet.length;
    this.myListView.refreshData();
  }
  /**
   * @event onLoad
   * This event is called once when page is created.
   */
  onLoad() {
    super.onLoad();
    this.headerBar.leftItemEnabled = false;

    this.myListView.onRowBind = (ListViewItem: MyListViewItem, index) => {
      ListViewItem.myLabel.text = this.myDataSet[index].title;
    };
    this.myListView.onRowSwipe = (e) => {
      const deleteItem =
        new ListView.SwipeItem() as StyleContextComponentType<ListView.SwipeItem>;
      const editItem =
        new ListView.SwipeItem() as StyleContextComponentType<ListView.SwipeItem>;

      const items: ListView.SwipeItem[] = [];

      if (e.direction === ListView.SwipeDirection.RIGHTTOLEFT) {
        deleteItem.text = "Delete";
        themeService.addGlobalComponent(
          deleteItem as any,
          `deleteItem-${e.index}`
        );
        deleteItem.onPress = () => {
          this.deleteAndRefresh(e);
        };
        deleteItem.dispatch({
          type: "pushClassNames",
          classNames: ".swipeItem.delete",
        });
        items.push(deleteItem);
      } else if (e.direction === ListView.SwipeDirection.LEFTTORIGHT) {
        themeService.addGlobalComponent(editItem as any, `editItem-${e.index}`);
        editItem.text = "Edit";
        editItem.onPress = () => {
          // edit code here
        };
        editItem.dispatch({
          type: "pushClassNames",
          classNames: ".swipeItem.edit",
        });
        items.push(editItem);
      }
      e.ios.expansionSettings.buttonIndex = 0;
      return items;
    };
    this.myListView.onRowCanSwipe = (index: number) => {
      return [
        ListView.SwipeDirection.RIGHTTOLEFT,
        ListView.SwipeDirection.LEFTTORIGHT,
      ];
    };
    this.myListView.swipeEnabled = true;
    this.myListView.rowHeight = 70;
  }

  onHide(): void {
    this.dispose();
  }

  dispose(): void {
    this.disposeables.forEach((item) => item());
  }
}

SwipeItem Style

/themes/yourTheme/styles

{
  ".swipeItem": {
    "textColor": "#FFFFFF",
    "font": {
      "family": "SFProText",
      "style": "Regular",
      "bold": false,
      "italic": false,
      "size": 14
    },
    "ios": {
      "iconTextSpacing": 5,
      "padding": 30
    },
    ".delete": {
      "backgroundColor": "#FF0000"
    },
    ".edit": {
      "backgroundColor": "#0000FF"
    }
  }
}

caution

Be sure that you set the backgroundColor of the ListViewItem to any color other than transparent. If you don't, the swipe item backgroundColor will overlap with the ListViewItem backgroundColor.

Drag and Drop ListViewItems

ListViewItems can be selected and moved to a different location.
A simple example for Drag & Drop feature.

note

The components in the example are added from the code for better showcase purposes. To learn more about the subject you can refer to:

Adding Component From Code

As a best practice, Smartface recommends using the WYSIWYG editor in order to add components and styles to your page or library. To learn how to use UI Editor better, please refer to this documentation

UI Editor Basics

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import System from "@smartface/native/device/system";
import Application from "@smartface/native/application";
import { Route, Router } from "@smartface/router";
import {
  styleableContainerComponentMixin,
  styleableComponentMixin,
} from "@smartface/styling-context";
import Label from "@smartface/native/ui/label";
import Color from "@smartface/native/ui/color";
import ListView from "@smartface/native/ui/listview";
import ListViewItem from "@smartface/native/ui/listviewitem";
import { RowAnimation } from "@smartface/native/ui/listview/listview";

class StyleableListView extends styleableComponentMixin(ListView) {}
class StyleableLabel extends styleableComponentMixin(Label) {}
class StyleableListViewItem extends styleableContainerComponentMixin(
  ListViewItem
) {}

type RowDataType = Array<Array<string>>;
type DataType = { isHeader: boolean; data: string };
const HEADER_TYPE: number = 2;
const GENERAL_TYPE: number = 1;

//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
  myListView: StyleableListView;
  index: number = 0;
  headerData: string[] = ["Complementary", "Analogous"];
  rowData: Array<Array<string>> = [
    ["#eeb8ff", "#ffb8c9", "#c9ffb8", "#b8ffee"],
    ["#ff6c8f", "#ff85a2", "#ff9fb6", "#ffb8c9", "#ffd2dc", "#ffebf0"],
  ];
  dataArray: DataType[] = this.pushDataToArray(this.headerData, this.rowData);

  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  array_move(
    arr: DataType[],
    old_index: number,
    new_index: number
  ): DataType[] {
    if (new_index >= arr.length) {
      var k = new_index - arr.length + 1;
      while (k--) {
        arr.push(undefined);
      }
    }
    arr.splice(new_index, 0, arr.splice(old_index, 1)[0]);
    return arr;
  }

  pushDataToArray(headerData: string[], rowData: RowDataType): DataType[] {
    let dataArray: DataType[] = new Array<DataType>();
    for (var i = 0; i < headerData.length; i++) {
      dataArray.push({ isHeader: true, data: headerData[i] });
      for (var j = 0; j < rowData[i].length; j++) {
        dataArray.push({ isHeader: false, data: rowData[i][j] });
      }
    }
    return dataArray;
  }

  indexOfSecondHeader = () =>
    this.dataArray.findIndex((data) => data.data === "Analogous");

  // The page design has been made from the code for better
  // showcase purposes. As a best practice, remove this and
  // use WYSIWYG editor to style your pages.
  centerizeTheChildrenLayout() {
    this.style.apply({
      flexProps: {
        flexDirection: "ROW",
        justifyContent: "CENTER",
        alignItems: "CENTER",
      },
    });
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    Application.statusBar.visible = false;
    headerBar.visible = false;
  }

  onLoad() {
    super.onLoad();
    this.centerizeTheChildrenLayout();

    this.myListView = new StyleableListView({
      itemCount: this.dataArray.length,
    });
    this.myListView.rowMoveEnabled = true;
    this.myListView.onRowCreate = (type: number) => {
      let myListViewItem = new StyleableListViewItem();
      this.myListView.dispatch({
        type: "addChild",
        component: myListViewItem,
        name: `myListViewItem${++this.index}`,
      });

      if (type === GENERAL_TYPE) {
        let myLabelTitle = new StyleableLabel();
        let myEditableLbl = new StyleableLabel({
          text: "-",
        });

        //@ts-ignore
        myListViewItem.addChild(
          myEditableLbl,
          `myEditableLbl${this.index}`,
          ".label",
          {
            width: 30,
            height: 30,
            backgroundColor: "#cc3300",
            borderRadius: 15,
            textColor: "#FFFFFF",
            textAlignment: "MIDCENTER",
          }
        );

        //@ts-ignore
        myListViewItem.addChild(
          myLabelTitle,
          `myLabelTitle${this.index}`,
          ".label",
          {
            width: null,
            height: null,
            flexGrow: 1,
            margin: 10,
            textColor: "#FFFFFF",
            borderRadius: 10,
            textAlignment: "MIDCENTER",
          }
        );

        //@ts-ignore
        myListViewItem.myLabelTitle = myLabelTitle;
        //@ts-ignore
        myListViewItem.myEditableLbl = myEditableLbl;
      } else {
        // Header
        let myLabelTitle = new StyleableLabel();
        //@ts-ignore
        myListViewItem.addChild(
          myLabelTitle,
          `myLabelTitle${this.index}`,
          ".label",
          {
            width: null,
            height: null,
            flexGrow: 1,
            margin: 10,
            backgroundColor: "#FFFFFF",
            borderRadius: 15,
            textAlignment: "MIDCENTER",
          }
        );

        //@ts-ignore
        myListViewItem.myLabelTitle = myLabelTitle;
      }
      //@ts-ignore
      myListViewItem.style.apply({
        flexProps: {
          flexDirection: "ROW",
          alignItems: "CENTER",
        },
      });

      return myListViewItem;
    };
    this.myListView.onRowHeight = (index: number): number => {
      if (this.dataArray[index].isHeader) {
        return 70;
      }
      return 40;
    };
    this.myListView.onRowBind = (listViewItem: ListViewItem, index: number) => {
      //@ts-ignore
      const { myLabelTitle, myEditableLbl } = listViewItem;

      if (this.dataArray[index].isHeader) {
        myLabelTitle.text = this.dataArray[index].data;
      } else {
        myLabelTitle.backgroundColor = Color.create(this.dataArray[index].data);
        myLabelTitle.text = this.dataArray[index].data;
        if (index > this.indexOfSecondHeader()) {
          myEditableLbl.text = "+";
          myEditableLbl.backgroundColor = Color.GREEN;
          myEditableLbl.onTouch = (): boolean => {
            console.info("TOUCH LABEL");
            let index = this.myListView.indexByListViewItem(listViewItem);
            let prevData = this.dataArray[index];
            this.dataArray.splice(index, 1);
            this.myListView.itemCount = this.dataArray.length;
            this.myListView.deleteRowRange({
              positionStart: index,
              itemCount: 1,
              ios: {
                animation: RowAnimation.FADE,
              },
            });
            this.dataArray.splice(this.indexOfSecondHeader(), 0, prevData);
            this.myListView.itemCount = this.dataArray.length;
            this.myListView.insertRowRange({
              positionStart: this.indexOfSecondHeader() - 1,
              itemCount: 1,
              ios: {
                animation: RowAnimation.FADE,
              },
            });
            return false;
          };
        } else {
          myEditableLbl.text = "-";
          myEditableLbl.backgroundColor = Color.RED;
          myEditableLbl.onTouch = (): boolean => {
            let index = this.myListView.indexByListViewItem(listViewItem);
            let prevData = this.dataArray[index];
            this.dataArray.splice(index, 1);
            this.myListView.itemCount = this.dataArray.length;
            this.myListView.deleteRowRange({
              positionStart: index,
              itemCount: 1,
              ios: {
                animation: RowAnimation.FADE,
              },
            });
            this.dataArray.splice(this.indexOfSecondHeader() + 1, 0, prevData);
            this.myListView.itemCount = this.dataArray.length;
            this.myListView.insertRowRange({
              positionStart: this.indexOfSecondHeader() + 1,
              itemCount: 1,
              ios: {
                animation: RowAnimation.FADE,
              },
            });
            return false;
          };
        }
      }
    };
    this.myListView.onRowType = (index: number): number => {
      if (this.dataArray[index].isHeader) {
        return HEADER_TYPE;
      } else {
        return GENERAL_TYPE;
      }
    };
    this.myListView.onRowMoved = (source: number, dest: number) => {
      this.dataArray = this.array_move(this.dataArray, source, dest);
    };
    this.myListView.onRowMove = (
      sourceIndex: number,
      desIndex: number
    ): boolean => {
      if (
        this.dataArray[desIndex].isHeader ||
        desIndex > this.indexOfSecondHeader()
      ) {
        return false;
      }
      return true;
    };
    this.myListView.onRowCanMove = (index: number) => {
      if (
        !this.dataArray[index].isHeader &&
        this.indexOfSecondHeader() > index
      ) {
        return true;
      }
      return false;
    };

    this.addChild(this.myListView, "myListView", ".listView", {
      width: null,
      height: null,
      flexGrow: 1,
      marginLeft: 20,
      marginRight: 20,
      marginTop: 15,
      marginBottom: 15,
    });

    this.style.apply({
      paddingTop: 0,
      paddingLeft: 0,
      paddingBottom: 0,
      paddingRight: 0,
    });
  }
}

Zebra Design

If you need to apply a Zebra Pattern, you should change the background of the ListViewItem in every odd(or even) index, depending on your design.

First, you should create a component on Smartface UI Editor to for your element. For this, a simple ListViewItem with one label inside is enough.

info

For Component Theme, baseTheme was used in this documentation. It is highly recommended to create your own theme and define your styles there. Refer to the document below for more information:

Using Themes in Apps

Component UI

.ui/library/lviElement.cpx

{
  "components": [
    {
      "className": ".listViewItem .lviElement",
      "hiddenComponent": true,
      "id": "5fa1-c783-3861-0cb7",
      "props": {
        "children": ["bb91-5e65-a2ff-3aa6"],
        "name": "lviElement",
        "parent": "57f4-201f-4bfc-5fc6"
      },
      "ref": null,
      "source": {
        "page": "__library__"
      },
      "type": "ListViewItem",
      "userProps": {}
    },
    {
      "className": ".flexLayout .lviElement-wrapper",
      "id": "bb91-5e65-a2ff-3aa6",
      "oldName": "flexLayout1",
      "props": {
        "children": [
          "2d6a-b1ca-e0b7-9915",
          "6ef8-17ba-8d17-2919",
          "38a7-93f0-66c9-236e"
        ],
        "name": "flElementWrapper",
        "parent": "5fa1-c783-3861-0cb7",
        "usePageVariable": true
      },
      "ref": null,
      "source": {
        "page": "__library__"
      },
      "type": "FlexLayout",
      "userProps": {
        "usePageVariable": true
      }
    },
    {
      "className": ".label .lviElement-title",
      "id": "2d6a-b1ca-e0b7-9915",
      "oldName": "label1_1",
      "props": {
        "children": [],
        "name": "lblKey",
        "parent": "bb91-5e65-a2ff-3aa6",
        "text": "ListView Cell Title",
        "usePageVariable": true
      },
      "ref": null,
      "source": {
        "page": "__library__"
      },
      "type": "Label",
      "userProps": {
        "text": "ListView Cell Title",
        "usePageVariable": true
      }
    },
    {
      "className": ".label .lviElement-title.value",
      "id": "6ef8-17ba-8d17-2919",
      "oldName": "label1",
      "props": {
        "children": [],
        "name": "lblValue",
        "parent": "bb91-5e65-a2ff-3aa6",
        "text": "ListView Cell Title",
        "usePageVariable": true
      },
      "ref": null,
      "source": {
        "page": "__library__"
      },
      "type": "Label",
      "userProps": {
        "text": "ListView Cell Title",
        "usePageVariable": true
      }
    },
    {
      "className": ".flexLayout .lviElement-line",
      "id": "38a7-93f0-66c9-236e",
      "oldName": "flexLayout1",
      "props": {
        "children": [],
        "name": "flLine",
        "parent": "bb91-5e65-a2ff-3aa6"
      },
      "source": {
        "page": "__library__"
      },
      "type": "FlexLayout",
      "userProps": {}
    }
  ]
}

Component Code

scripts/components/lviElement.ts

import LviElementDesign from "generated/my-components/LviElement";
import { themeService } from "theme";

const wrapperClassName = ".lviElement-wrapper";

export default class LviElement extends LviElementDesign {
  pageName?: string | undefined;
  constructor(props?: any, pageName?: string) {
    super(props);
    this.pageName = pageName;
  }

  get keyText(): string {
    return this.lblKey.text;
  }

  set keyText(key: string) {
    this.lblKey.text = key;
  }

  get valueText(): string {
    return this.lblValue.text;
  }

  set valueText(value: string) {
    this.lblValue.text = value;
  }

  toggleZebra(isZebra = false) {
    this.flElementWrapper.style.addClass(
      isZebra ? `${wrapperClassName}-zebra` : `${wrapperClassName}`
    );
  }

  static getHeight(): number {
    return themeService.getStyle(".lviElement").height || 0;
  }
}

Component Theme

themes/baseTheme/styles/components/lviElement.json

{
  ".lviElement": {
    "height": 54,
    "flexProps": {
      "alignItems": "CENTER",
      "flexDirection": "ROW"
    },
    "&-wrapper": {
      "flexProps": {
        "flexDirection": "ROW",
        "flexGrow": 1
      },
      "backgroundColor": "rgba( 255, 255, 255, 1 )",
      "height": 54,
      "&-zebra": {
        "backgroundColor": "rgba( 242, 242, 242, 0.8 )"
      },
      "paddingLeft": 16,
      "paddingRight": 16,
      "marginLeft": 0
    },
    "&-title": {
      "flexProps": {
        "positionType": "RELATIVE",
        "alignSelf": "AUTO",
        "flexGrow": 1
      },
      "font": {
        "size": 15,
        "bold": true,
        "italic": false,
        "family": "SFProText",
        "style": "Semibold"
      },
      "height": 20,
      "marginBottom": null,
      "marginTop": 13,
      "textAlignment": "MIDLEFT",
      "textColor": "rgba( 0, 0, 0, 1 )",
      "marginLeft": 0,
      ".value": {
        "marginLeft": 16,
        "textAlignment": "MIDRIGHT"
      }
    },
    "&-line": {
      "backgroundColor": "rgba( 235, 235, 235, 1 )",
      "bottom": 0,
      "flexProps": {
        "positionType": "ABSOLUTE"
      },
      "height": 1,
      "left": 0,
      "marginBottom": null,
      "marginTop": null,
      "right": 0
    }
  }
}

After we have created our component, let's add it to the listView on our page

Page UI

.ui/pageSample.pgx

{
  "components": [
    {
      "className": ".page",
      "id": "1089-3f6c-f87f-a283",
      "initialized": true,
      "props": {
        "children": [
          "de44-ae7b-2ea5-27da",
          "1e5e-7190-afee-ef44",
          "d180-9017-4354-3c7b"
        ],
        "name": "pgListviewZebra",
        "orientation": "PORTRAIT",
        "parent": null,
        "safeAreaEnabled": true
      },
      "type": "Page",
      "userProps": {
        "safeAreaEnabled": true
      },
      "version": "0.0.1.a"
    },
    {
      "className": ".statusBar",
      "id": "de44-ae7b-2ea5-27da",
      "props": {
        "children": [],
        "isRemovable": false,
        "name": "statusBar",
        "parent": "1089-3f6c-f87f-a283"
      },
      "type": "StatusBar",
      "userProps": {}
    },
    {
      "className": ".headerBar",
      "id": "1e5e-7190-afee-ef44",
      "props": {
        "children": [],
        "isRemovable": false,
        "name": "headerBar",
        "parent": "1089-3f6c-f87f-a283",
        "title": "ListviewZebra"
      },
      "type": "HeaderBar",
      "userProps": {
        "title": "ListviewZebra"
      }
    },
    {
      "className": ".listView",
      "id": "d180-9017-4354-3c7b",
      "oldName": "listView1",
      "props": {
        "children": ["a0b7-84f1-1281-e515"],
        "name": "lvElements",
        "parent": "1089-3f6c-f87f-a283",
        "usePageVariable": true
      },
      "ref": null,
      "type": "ListView",
      "userProps": {
        "flexProps": {
          "flexGrow": 1
        },
        "height": null,
        "testId": "ywq9RmsuL",
        "usePageVariable": true
      }
    },
    {
      "className": ".listViewItem .lviElement",
      "hiddenComponent": false,
      "id": "a0b7-84f1-1281-e515",
      "props": {
        "children": [],
        "name": "lviElement",
        "parent": "d180-9017-4354-3c7b"
      },
      "ref": null,
      "source": {
        "page": "__library__",
        "type": "lviElement",
        "id": "5fa1-c783-3861-0cb7"
      },
      "type": "ListViewItem",
      "userProps": {
        "flex": {
          "positionType": 0
        },
        "flexProps": {
          "positionType": "RELATIVE"
        },
        "left": 0,
        "top": 0
      }
    }
  ]
}

Page Code

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import LviElement from "components/LviElement";
import { Route, Router } from "@smartface/router";
import System from "@smartface/native/device/system";
import Application from "@smartface/native/application";

export default class Sample extends PageSampleDesign {
  elements = [...Array(20)].map((_, index) => ({
    key: `Element${index}`,
    value: `Element${index} Value`,
  }));

  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  initListView() {
    this.lvElements.rowHeight = LviElement.getHeight();
    this.lvElements.onRowBind = (listViewItem: LviElement, index: number) => {
      listViewItem.keyText = this.elements[index].key;
      listViewItem.valueText = this.elements[index].value;
      listViewItem.toggleZebra(index % 2 !== 0);
    };
    this.lvElements.refreshEnabled = false;
  }
  refreshListView() {
    this.lvElements.itemCount = this.elements.length;
    this.lvElements.refreshData();
  }

  onShow() {
    super.onShow();
    const { headerBar } =
      System.OS === System.OSType.ANDROID ? this : this.parentController;
    headerBar.visible = false;
    Application.statusBar.visible = false;
    this.refreshListView();
  }

  onLoad() {
    super.onLoad();
    this.initListView();
  }
}

tip

Do not forget to add your new page to your router.

Smooth Search - iOS Search Behavior

Since Smartface is Native Cross-Platform Framework, you can directly use iOS search behavior but you need to access Native-API-Access and your code will only work for iOS. To make it work for both platforms, we need to mimic it using various UI manipulations.

Let's create our Smooth Search component first:

Component UI

.ui/library/smoothSearch.cpx

{
  "components": [
    {
      "className": ".flexLayout .smoothSearch",
      "id": "27ad-7411-0826-c0ed",
      "initialized": true,
      "props": {
        "children": ["8409-eec3-8789-6461"],
        "name": "smoothSearch",
        "parent": "57f4-201f-4bfc-5fc6"
      },
      "source": {
        "page": "__library__"
      },
      "type": "FlexLayout",
      "userProps": {}
    },
    {
      "className": ".flexLayout .smoothSearch-inner",
      "id": "8409-eec3-8789-6461",
      "props": {
        "children": ["baa5-2887-cf62-057b"],
        "name": "flInnerSearch",
        "parent": "27ad-7411-0826-c0ed",
        "usePageVariable": true
      },
      "source": {
        "page": "__library__"
      },
      "type": "FlexLayout",
      "userProps": {
        "usePageVariable": true
      }
    },
    {
      "className": ".searchView .smoothSearch-searchView",
      "id": "baa5-2887-cf62-057b",
      "props": {
        "children": [],
        "hint": "Search",
        "name": "searchBar",
        "parent": "8409-eec3-8789-6461",
        "usePageVariable": true
      },
      "source": {
        "page": "__library__"
      },
      "type": "SearchView",
      "userProps": {
        "hint": "Search",
        "usePageVariable": true
      }
    }
  ]
}

Component Code

scripts/components/SmoothSearch.ts

import SmoothSearchDesign from "generated/my-components/SmoothSearch";
import { themeService } from "theme";

import ListView from "@smartface/native/ui/listview";

export default class SmoothSearch extends SmoothSearchDesign {
  pageName?: string | undefined;
  static MaxSearchHeight: number =
    themeService.getStyle(".smoothSearch").height || 0;
  static InnerMaxSearchFlexHeight: number =
    themeService.getStyle(".smoothSearch-inner").height || 0;
  static InnerMaxSearchFlexBorderRadius: number =
    themeService.getStyle(".smoothSearch-inner").borderRadius || 0;

  private layoutHeight = SmoothSearch.MaxSearchHeight;
  private innerHeight = SmoothSearch.InnerMaxSearchFlexHeight;
  constructor(props?: any, pageName?: string) {
    super(props);
    this.pageName = pageName;
  }

  get searchBarHint(): string {
    return this.searchBar.hint || "";
  }

  set searchBarHint(value: string) {
    this.searchBar.hint = value || "";
  }

  /**
   * This will be used on the page.
   */
  onScroll(params: Parameters<ListView["onScroll"]>[0]) {
    let alpha = 1;
    let borderRadius = SmoothSearch.InnerMaxSearchFlexBorderRadius;
    /**
     * Normal scroll to bottom
     */
    if (
      params.contentOffset.y >= 0 &&
      params.contentOffset.y < SmoothSearch.MaxSearchHeight
    ) {
      this.layoutHeight = SmoothSearch.MaxSearchHeight - params.contentOffset.y;
      this.innerHeight =
        SmoothSearch.InnerMaxSearchFlexHeight - params.contentOffset.y;
      borderRadius =
        (this.innerHeight * SmoothSearch.InnerMaxSearchFlexBorderRadius) /
        SmoothSearch.InnerMaxSearchFlexHeight;
    } else if (params.contentOffset.y < 0) {
      /**
       * Overscroll to top
       */
      if (this.layoutHeight !== SmoothSearch.MaxSearchHeight) {
        this.layoutHeight = SmoothSearch.MaxSearchHeight;
        this.innerHeight = SmoothSearch.InnerMaxSearchFlexHeight;
      }
    } else if (this.layoutHeight !== 0) {
      /**
       * Scrolled enough to cover the height of search
       */
      this.layoutHeight = 0;
      this.innerHeight = 0;
      alpha = 0;
    }

    this.dispatch({
      type: "updateUserStyle",
      userStyle: {
        height: this.layoutHeight,
        alpha,
      },
    });
    this.flInnerSearch.dispatch({
      type: "updateUserStyle",
      userStyle: {
        height: this.innerHeight,
        borderRadius,
      },
    });
    this.searchBar.dispatch({
      type: "updateUserStyle",
      userStyle: {
        alpha: (this.layoutHeight - SmoothSearch.InnerMaxSearchFlexHeight) / 10,
      },
    });
  }
}

Component Style

themes/baseTheme/styles/components/SmoothSearch.ts

{
  ".smoothSearch": {
    "flexProps": {
      "positionType": "ABSOLUTE"
    },
    "backgroundColor": "rgba( 0, 161, 241, 1 )",
    "height": 45,
    "&-inner": {
      "backgroundColor": "rgba( 245, 245, 245, 1 )",
      "borderRadius": 10,
      "height": 35,
      "marginTop": 5
    },
    "paddingLeft": 10,
    "paddingRight": 10,
    "&-searchView": {
      "flexProps": {
        "positionType": "ABSOLUTE"
      },
      "left": 0,
      "right": 0,
      "bottom": -20,
      "top": -20,
      "ios": {
        "searchViewStyle": "PROMINENT"
      },
      "backgroundColor": "rgba( 245, 245, 245, 1 )",
      "textFieldBackgroundColor": "rgba( 245, 245, 245, 1 )",
      "height": null
    },
    "alpha": 1,
    "left": 0,
    "right": 0,
    "marginTop": 0
  }
}

Page UI

.ui/pgSmoothScroll.pgx

{
  "components": [
    {
      "className": ".page",
      "id": "0f08-29dc-e38d-7236",
      "initialized": true,
      "props": {
        "children": [
          "adb2-475e-6350-bed7",
          "8f5d-c5b6-c991-7ac0",
          "f4a4-5d27-c25b-d509",
          "9282-28b3-d844-f412"
        ],
        "name": "pgSmoothScroll",
        "orientation": "PORTRAIT",
        "parent": null
      },
      "type": "Page",
      "userProps": {
        "paddingLeft": 0,
        "paddingRight": 0,
        "paddingTop": 0
      }
    },
    {
      "className": ".statusBar",
      "id": "adb2-475e-6350-bed7",
      "props": {
        "children": [],
        "isRemovable": false,
        "name": "statusBar",
        "parent": "0f08-29dc-e38d-7236"
      },
      "type": "StatusBar",
      "userProps": {
        "visible": true
      }
    },
    {
      "className": ".headerBar",
      "id": "8f5d-c5b6-c991-7ac0",
      "props": {
        "children": [],
        "isRemovable": false,
        "name": "headerBar",
        "parent": "0f08-29dc-e38d-7236",
        "title": "pgSmoothScroll"
      },
      "type": "HeaderBar",
      "userProps": {
        "title": "pgSmoothScroll"
      }
    },
    {
      "className": ".listView",
      "id": "f4a4-5d27-c25b-d509",
      "props": {
        "children": ["d1f4-6f62-c98c-c660"],
        "name": "lvElements",
        "parent": "0f08-29dc-e38d-7236",
        "usePageVariable": true
      },
      "type": "ListView",
      "userProps": {
        "flexProps": {
          "flexGrow": 1
        },
        "testId": "q0Ls07o-G",
        "usePageVariable": true
      }
    },
    {
      "className": ".listViewItem .listViewItem-simple",
      "hiddenComponent": false,
      "id": "d1f4-6f62-c98c-c660",
      "initialized": true,
      "props": {
        "children": [],
        "name": "lviElement",
        "parent": "f4a4-5d27-c25b-d509"
      },
      "source": {
        "page": "__library__",
        "type": "lviElement",
        "id": "1841-ff9a-b968-028d"
      },
      "type": "ListViewItem",
      "userProps": {
        "flex": {
          "positionType": 0
        },
        "flexProps": {
          "positionType": "RELATIVE"
        },
        "left": 0,
        "testId": "GCYhrFDlM",
        "top": 0
      }
    },
    {
      "className": ".flexLayout .smoothSearch",
      "hiddenComponent": false,
      "id": "9282-28b3-d844-f412",
      "initialized": true,
      "props": {
        "children": [],
        "name": "smoothSearch",
        "parent": "0f08-29dc-e38d-7236",
        "usePageVariable": true
      },
      "source": {
        "page": "__library__",
        "type": "smoothSearch",
        "id": "27ad-7411-0826-c0ed"
      },
      "type": "FlexLayout",
      "userProps": {
        "testId": "29gzvt5T7",
        "usePageVariable": true
      }
    }
  ]
}

Page Code

scripts/pages/pgSmoothScroll.ts

import PgSmoothScrollDesign from "generated/pages/pgSmoothScroll";

import LviElement from "components/LviElement";
import SmoothSearch from "components/SmoothSearch";
import System from "@smartface/native/device/system";
import { Route, Router } from "@smartface/router";

export default class pgSmoothScroll extends PgSmoothScrollDesign {
  elements = [...Array(30)].map((_, i) => ({
    key: `Smartface ${i}`,
    value: ``,
  }));
  parentController: any;
  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  initSearchView() {
    this.smoothSearch.searchBarHint = "Search";
  }

  removeHeaderBorder() {
    //Removes black line on iOS and sets elevation to 0 on android
    if (System.OS === System.OSType.IOS) {
      this.parentController.headerBar.borderVisibility = false;
    } else {
      this.headerBar.android.elevation = 0;
    }
  }

  initListView() {
    this.lvElements.rowHeight = LviElement.getHeight();
    this.lvElements.refreshEnabled = false;

    //contentInset can be set from UI edtior as well.
    this.lvElements.contentInset = {
      top: SmoothSearch.MaxSearchHeight,
      bottom: 0,
    };

    this.lvElements.onRowBind = (listViewItem: LviElement, index: number) => {
      listViewItem.keyText = this.elements[index].key;
      listViewItem.valueText = this.elements[index].value;
    };

    this.lvElements.onScroll = (params) => this.smoothSearch.onScroll(params);
    //@ts-ignore
    this.lvElements.ios.onScrollEndDecelerating = (contentOffset) => {
      if (
        contentOffset.y > 0 &&
        contentOffset.y < SmoothSearch.MaxSearchHeight
      ) {
        const contentOffsetY =
          contentOffset.y / SmoothSearch.MaxSearchHeight <= 0.5
            ? -SmoothSearch.MaxSearchHeight
            : 0;
        this.lvElements.nativeObject.setContentOffsetAnimated(
          { x: 0, y: contentOffsetY },
          true
        );
      }
    };
    //@ts-ignore
    this.lvElements.ios.onScrollEndDraggingWillDecelerate = (
      contentOffset,
      decelerate
    ) => {
      if (!decelerate) {
        if (
          contentOffset.y > 0 &&
          contentOffset.y < SmoothSearch.MaxSearchHeight
        ) {
          const contentOffsetY =
            contentOffset.y / SmoothSearch.MaxSearchHeight <= 0.5
              ? -SmoothSearch.MaxSearchHeight
              : 0;
          this.lvElements.nativeObject.setContentOffsetAnimated(
            { x: 0, y: contentOffsetY },
            true
          );
        }
      }
    };
  }
  refreshListView() {
    this.lvElements.itemCount = this.elements.length;
    this.lvElements.refreshData();
  }

  onShow() {
    super.onShow();
    this.headerBar.title = "Smooth Scroll";
    this.removeHeaderBorder();
    this.refreshListView();
  }

  onLoad() {
    super.onLoad();
    this.initSearchView();
    this.initListView();
  }
}

After creating the component, you can drag & drop it to your newly created page.

info

Note that for ListView element, the LviElement component from previous Zebra Design was used. You can use any ListViewItem component, it is not related to Smooth Search implementation.

If you also want to use Zebra design together with smooth scroll, you can copy the onRowBind method from the previous example page code.

ListView Index

With list view index, you can navigate to a specific item in the list.

Component UI

.ui/library/flListViewIndex.cpx

{
  "components": [
    {
      "className": ".flexLayout .flListViewIndex",
      "hiddenComponent": true,
      "id": "a0b6-0ec3-4011-9736",
      "initialized": false,
      "props": {
        "children": [],
        "name": "flListViewIndex",
        "parent": "57f4-201f-4bfc-5fc6"
      },
      "source": {
        "page": "__library__"
      },
      "type": "FlexLayout",
      "userProps": {}
    }
  ]
}

Component Code

scripts/components/flListViewIndex.ts

import FlListViewIndexDesign from "generated/my-components/FlListViewIndex";
import Screen from "@smartface/native/device/screen";
import Label from "@smartface/native/ui/label";
import { themeService } from "theme";
const labelLayoutStyles = themeService.getNativeStyle(".flListViewIndex-label");
const labelStyles = themeService.getNativeStyle(".flListViewIndex-label");
const labelHeight = themeService.getNativeStyle(
  ".flListViewIndex-label"
).height;

const FL_LIST_VIEW_INDEX_LOCK_TIMEOUT = 200;

export default class FlListViewIndex extends FlListViewIndexDesign {
  pageName?: string | undefined;
  lock: boolean = false;
  labels: Label[] = [];
  _values: string[] = [];
  _topMargin: number = 0;
  _onItemSelect: (selectedLabel: string) => void;
  constructor(props?: any, pageName?: string) {
    super(props);
    this.pageName = pageName;
    this.on("touchMoved", (e) => {
      if (this._onItemSelect) {
        const selectedLabel = this.calculateItem(e.y);
        !this.lock && this._onItemSelect(selectedLabel);
        this.lock = true;
        setTimeout(() => (this.lock = false), FL_LIST_VIEW_INDEX_LOCK_TIMEOUT);
      }
    });
    this.on("touchEnded", (e) => {
      if (this._onItemSelect) {
        const selectedLabel = this.calculateItem(e.y);
        !this.lock && this._onItemSelect(selectedLabel);
        this.lock = true;
        setTimeout(() => (this.lock = false), FL_LIST_VIEW_INDEX_LOCK_TIMEOUT);
      }
    });
  }
  calculateItem(y: number) {
    return (
      this._values[Math.round(y / labelHeight)] ||
      this._values[this._values.length - 1]
    );
  }
  set onItemSelect(value: (selectedLabel: string) => void) {
    this._onItemSelect = value;
  }
  set topMargin(value: number) {
    this._topMargin = value;
  }
  get topMargin(): number {
    return this._topMargin;
  }
  topToDispatch(): number {
    const height = (this._values || []).length * labelHeight;
    return (Screen.height - height) / 2;
  }
  set indexes(values: string[]) {
    this._values = values;
    values.forEach((value, index) => {
      const label = new Label({ ...labelLayoutStyles, ...labelStyles });
      label.text = value;
      this.addChild(label, `${value}/${index}`);
      this.labels.push(label);
    });
  }
}

Component Theme

themes/baseTheme/styles/components/FlListViewIndex.json

{
  ".flListViewIndex": {
    "width": 30,
    "right": 0,
    "top": 0,
    "bottom": 0,
    "height": null,
    "flexProps": {
      "alignItems": "STRETCH",
      "justifyContent": "FLEX_START",
      "positionType": "ABSOLUTE"
    },
    "&-label": {
      "width": null,
      "flexProps": {
        "flexGrow": null,
        "alignSelf": "STRETCH"
      },
      "height": 24,
      "textAlignment": "MIDCENTER",
      "font": {
        "family": "SFProText",
        "style": "Medium",
        "size": 15,
        "bold": false,
        "italic": false
      },
      "textColor": "#000000"
    }
  }
}

Page UI

.ui/pageSample.pgx

{
  "components": [
    {
      "className": ".page",
      "id": "e891b86d",
      "initialized": true,
      "props": {
        "children": ["42b807d1", "b7d28cff", "d9be-e465-7a6b-8eeb"],
        "isRemovable": true,
        "name": "pageSample",
        "orientation": "PORTRAIT",
        "parent": null,
        "safeAreaEnabled": true
      },
      "type": "Page",
      "userProps": {
        "orientation": "PORTRAIT",
        "safeAreaEnabled": true
      },
      "version": "6.15.1"
    },
    {
      "className": " .statusBar",
      "id": "42b807d1",
      "props": {
        "children": [],
        "isRemovable": false,
        "name": "statusBar",
        "parent": "e891b86d"
      },
      "type": "StatusBar",
      "userProps": {}
    },
    {
      "className": ".headerBar",
      "id": "b7d28cff",
      "props": {
        "children": [],
        "isRemovable": false,
        "name": "headerBar",
        "parent": "e891b86d",
        "title": "PageSample"
      },
      "type": "HeaderBar",
      "userProps": {
        "title": "PageSample"
      }
    },
    {
      "className": ".flexLayout .flListViewIndex",
      "hiddenComponent": false,
      "id": "d9be-e465-7a6b-8eeb",
      "initialized": false,
      "props": {
        "children": [],
        "name": "flListViewIndex",
        "parent": "e891b86d"
      },
      "source": {
        "page": "__library__",
        "type": "flListViewIndex",
        "id": "a0b6-0ec3-4011-9736"
      },
      "type": "FlexLayout",
      "userProps": {}
    }
  ]
}

Page Code

scripts/pages/pageSample.ts

import PageSampleDesign from "generated/pages/pageSample";
import ListView from "@smartface/native/ui/listview";
import ListViewItem from "@smartface/native/ui/listviewitem";
import Label from "@smartface/native/ui/label";
import Color from "@smartface/native/ui/color";
import Font from "@smartface/native/ui/font";
import System from "@smartface/native/device/system";
import { Route } from "@smartface/router";
import { withDismissAndBackButton } from "@smartface/mixins";
import { Router } from "@smartface/router";
import Application from "@smartface/native/application";

export default class PageSample extends withDismissAndBackButton(
  PageSampleDesign
) {
  listViewItemArray: any[] = [];
  listViewItemIndexItems = "abcdefghijklmnopqrstuvwxyz".toUpperCase().split("");
  myListView: ListView;
  headerIndex: number[] = [];
  constructor(private router?: Router, private route?: Route) {
    super({});
  }

  initListView() {
    var _rowData = [];
    for (var i = 0; i < this.listViewItemIndexItems.length; i++) {
      _rowData.push([
        "#ff6c8f",
        "#ff85a2",
        "#ff9fb6",
        "#ffb8c9",
        "#ffd2dc",
        "#ffebf0",
      ]);
    }

    const pushDataToArray = (headerData, rowData) => {
      for (var i = 0; i < headerData.length; i++) {
        this.listViewItemArray.push({ isHeader: true, data: headerData[i] });
        this.headerIndex.push(this.listViewItemArray.length - 1);
        for (var j = 0; j < rowData[i].length; j++) {
          this.listViewItemArray.push({ isHeader: false, data: rowData[i][j] });
        }
      }
    };
    pushDataToArray(this.listViewItemIndexItems, _rowData);
    this.myListView = new ListView({
      flexGrow: 1,
      marginLeft: 20,
      itemCount: this.listViewItemArray.length,
    });

    this.myListView.refreshEnabled = false;

    this.layout.addChild(this.myListView);
    this.myListView.onRowCreate = (type) => {
      var myListViewItem: ListViewItem & { myLabelTitle?: Label } =
        new ListViewItem();

      if (type == 1) {
        var myLabelTitle = new Label({
          flexGrow: 1,
          margin: 10,
        });
        myLabelTitle.textColor = Color.WHITE;
        myLabelTitle.borderRadius = 10;
        myListViewItem.addChild(myLabelTitle);
        myListViewItem.myLabelTitle = myLabelTitle;
      } else {
        // Header
        var myLabelTitle = new Label({
          flexGrow: 1,
          margin: 10,
        });
        myLabelTitle.font = Font.create(Font.DEFAULT, 30, Font.BOLD);
        myLabelTitle.backgroundColor = Color.WHITE;
        myListViewItem.addChild(myLabelTitle);
        myListViewItem.myLabelTitle = myLabelTitle;
      }

      return myListViewItem;
    };

    this.myListView.onRowHeight = (index) => {
      if (this.listViewItemArray[index].isHeader) {
        return 100;
      }
      return 70;
    };

    this.myListView.onRowBind = (listViewItem, index) => {
      //@ts-ignore
      var myLabelTitle = listViewItem.myLabelTitle;

      if (this.listViewItemArray[index].isHeader) {
        myLabelTitle.text =
          typeof this.listViewItemArray[index].data === "string"
            ? this.listViewItemArray[index].data
            : "Image";
      } else {
        myLabelTitle.backgroundColor = Color.create(
          this.listViewItemArray[index].data
        );
        myLabelTitle.text = this.listViewItemArray[index].data;
      }
    };

    this.myListView.onRowType = (index) =>
      this.listViewItemArray[index].isHeader ? 2 : 1;
  }

  initListViewIndex() {
    this.flListViewIndex.indexes = this.listViewItemIndexItems;
    this.flListViewIndex.onItemSelect = (selectedLabel: string) => {
      this.myListView.scrollTo(
        this.headerIndex[parseInt(selectedLabel, 36) - 10],
        true
      );
    };
  }

  onShow() {
    super.onShow();
    this.initBackButton(this.router);
    const statusBarHeight =
      System.OS === System.OSType.ANDROID ? Application.statusBar.height : 0;
    this.flListViewIndex.topMargin =
      (System.OS === System.OSType.ANDROID
        ? this.headerBar.height
        : this.parentController.headerBar.height || 0) + statusBarHeight;
    this.flListViewIndex.style.apply({
      top:
        this.flListViewIndex.topToDispatch() - this.flListViewIndex.topMargin,
    });
  }

  onLoad() {
    super.onLoad();
    this.initListView();
    this.initListViewIndex();
  }
}