制作過程:
先添加一個 TCategoryPanelGroup, 再從其右鍵菜單 -> New Panel, 反復添加三個 TCategoryPanel.
本例測試了:
TCategoryPanelGroup 的 ChevronAlignment 屬性、CollapseAll 和 ExpandAll 方法;
還有 TCategoryPanel 的 Collapsed 屬性.
本例效果圖:
代碼文件: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 = ('關閉 CPanel1','展開 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 := '全部關閉';
Button2.Caption := '全部展開';
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.
窗體文件:
object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 224
ClientWidth = 334
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
OnCreate = FormCreate
PixelsPerInch = 96
TextHeight = 13
object CategoryPanelGroup1: TCategoryPanelGroup
Left = 0
Top = 0
Width = 193
Height = 224
VertScrollBar.Tracking = True
HeaderFont.Charset = DEFAULT_CHARSET
HeaderFont.Color = clWindowText
HeaderFont.Height = -11
HeaderFont.Name = 'Tahoma'
HeaderFont.Style = []
TabOrder = 0
ExplicitHeight = 206
object CategoryPanel1: TCategoryPanel
Top = 0
Caption = 'CategoryPanel1'
TabOrder = 0
ExplicitWidth = 230
end
object CategoryPanel2: TCategoryPanel
Top = 200
Caption = 'CategoryPanel2'
TabOrder = 1
ExplicitWidth = 230
end
object CategoryPanel3: TCategoryPanel
Top = 400
Caption = 'CategoryPanel3'
TabOrder = 2
ExplicitWidth = 230
end
end
object RadioGroup1: TRadioGroup
Left = 209
Top = 8
Width = 115
Height = 105
Caption = 'RadioGroup1'
TabOrder = 1
OnClick = RadioGroup1Click
end
object Button1: TButton
Left = 221
Top = 126
Width = 92
Height = 25
Caption = 'Button1'
TabOrder = 2
OnClick = Button1Click
end
object Button2: TButton
Left = 221
Top = 157
Width = 92
Height = 25
Caption = 'Button2'
TabOrder = 3
end
object Button3: TButton
Left = 221
Top = 188
Width = 92
Height = 25
Caption = 'Button3'
TabOrder = 4
end
end
