(12)Delphi 2009 之 TCategoryPanelGroup[1]: ChevronAlignment 等

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所属分类:[开发技巧]

 

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:

 

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.
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
en
d

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
200809231707033032.rar

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