delphi 2009 之 TCategoryPanelGroup[1]: ChevronAlignment 等

制作过程:

先添加一个 TCategoryPanelGroup, 再从其右键菜单 -> New Panel, 反复添加三个 TCategoryPanel.

本例测试了:

TCategoryPanelGroup 的 ChevronAlignment 属性、CollapseAll 和 ExpandAll 方法;

还有 TCategoryPanel 的 Collapsed 属性.

本例效果图:

代码文件:

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, ExtCtrls, StdCtrls;

type

TForm1 = class(TForm)

CategoryPanelGroup1: TCategoryPanelGroup;

CategoryPanel1: TCategoryPanel;

CategoryPanel2: TCategoryPanel;

CategoryPanel3: TCategoryPanel;

RadioGroup1: TRadioGroup;

Button1: TButton;

Button2: TButton;

Button3: TButton;

procedure FormCreate(Sender: TObject);

procedure RadioGroup1Click(Sender: TObject);

procedure Button1Click(Sender: TObject);

end;

var

Form1: TForm1;

implementation

{$R *.dfm}

uses TypInfo;

const

BoolArr: array[Boolean] of string = ('关闭 CPanel1','展开 CPanel1');

procedure TForm1.FormCreate(Sender: TObject);

var

i: Integer;

begin

CategoryPanel1.Height := ClientHeight div 2;

CategoryPanel2.Height := CategoryPanel1.Height;

CategoryPanel3.Height := CategoryPanel1.Height;

CategoryPanel1.Caption := 'CPanel1';

CategoryPanel2.Caption := 'CPanel2';

CategoryPanel3.Caption := 'CPanel3';

Button1.Tag := 1;

Button2.Tag := 2;

Button3.Tag := 3;

Button2.OnClick := Button1.OnClick;

Button3.OnClick := Button1.OnClick;

Button1.Caption := '全部关闭';

Button2.Caption := '全部展开';

Button2.Click;

RadioGroup1.Caption := 'ChevronAlignment';

for i := 0 to 2 do

RadioGroup1.Items.Add(GetEnumName(TypeInfo(TAlignment), i));

RadioGroup1.ItemIndex := 0;

end;

procedure TForm1.RadioGroup1Click(Sender: TObject);

begin

CategoryPanelGroup1.ChevronAlignment := TAlignment(RadioGroup1.ItemIndex);

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

case TButton(Sender).Tag of

1: CategoryPanelGroup1.CollapseAll;

2: CategoryPanelGroup1.ExpandAll;

3: CategoryPanel1.Collapsed := not CategoryPanel1.Collapsed;

end;

Button3.Caption := BoolArr[CategoryPanel1.Collapsed];

end;

end.

推荐分享