Tree 树形控件

例子

基本用法

import {    Window,    Tree,    TreeInsert,    TreeGenericHandle,    TreeItemFlag,} from 'ave-ui';
export function main(window: Window) {    const tree = new Tree(window);    tree.OnSelectionChange((sender) => {        const handler = sender.ItemGetSelection();        const treeItem = sender.ItemGet(handler);        console.log(`select ${treeItem.Text}`);    });
    const A = new TreeInsert();    A.Parent = TreeGenericHandle.Root;    A.After = TreeGenericHandle.Last;    A.Item.Flag = TreeItemFlag.Text;    A.Item.Text = 'A';    const handlerA = tree.ItemInsert(A);
    const B = new TreeInsert();    B.Parent = handlerA;    B.After = TreeGenericHandle.Last;    B.Item.Flag = TreeItemFlag.Text;    B.Item.Text = 'B';    tree.ItemInsert(B);
    const C = new TreeInsert();    C.Parent = handlerA;    C.After = TreeGenericHandle.First;    C.Item.Flag = TreeItemFlag.Text;    C.Item.Text = 'C';    const handlerC = tree.ItemInsert(C);
    const D = new TreeInsert();    D.Parent = handlerC;    D.After = TreeGenericHandle.Last;    D.Item.Flag = TreeItemFlag.Text;    D.Item.Text = 'D';    tree.ItemInsert(D);
    const container = getControlDemoContainer(window, 1, 500, 300);    container.ControlAdd(tree).SetGrid(1, 1);    window.SetContent(container);}

在这个例子中，我们演示了树形控件的基本用法：显示一系列节点并响应点击事件:

同时控制台还有以下输出：

select Aselect Cselect Dselect B

API

export interface ITree extends IControl {    // 插入节点    ItemInsert(pInsert: TreeInsert): TreeItemHandle;
    // 获取节点，使用插入时返回的handler    ItemGet(pItem: TreeItemHandle): TreeItem;    // 获取当前选中的节点的handler    ItemGetSelection(): TreeItemHandle;
    OnSelectionChange(fn: (sender: Tree) => void): Tree;}
// 描述插入的节点export class TreeInsert {    // 指定父节点    Parent: TreeItemHandle = 0;    // 描述排序相关的    After: TreeItemHandle = 0;    // 实际树节点数据    Item: TreeItem = new TreeItem();}
// 内置的节点handlerexport class TreeGenericHandle {    // 根节点    static get Root(): TreeItemHandle;    // 描述排序相关的    // First: 将此节点排在第一个    // Last: 将此节点排在最后一个    static get First(): TreeItemHandle;    static get Last(): TreeItemHandle;    static get Sort(): TreeItemHandle;}
export class TreeItem {    Flag: TreeItemFlag = TreeItemFlag.None;    Icon: IconCache = 0;    // 节点文本内容    Text: string = '';    Item: TreeItemHandle = 0;    Blank: boolean = false;}