Delphi 2009 之 TCategoryPanelGroup[2]: HeaderAlignment、GradientDirection

本例效果图:

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代码文件:

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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;
    RadioGroup2: TRadioGroup;
    procedure FormCreate(Sender: TObject);
    procedure RadioGroup1Click(Sender: TObject);
    procedure RadioGroup2Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses TypInfo, GraphUtil;

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';

  RadioGroup1.Caption := 'HeaderAlignment';
  for i := 0 to 2 do
    RadioGroup1.Items.Add(GetEnumName(TypeInfo(TAlignment), i));
  RadioGroup1.ItemIndex := 0;

  RadioGroup2.Caption := 'GradientDirection';
  for i := 0 to 1 do
    RadioGroup2.Items.Add(GetEnumName(TypeInfo(TGradientDirection), i));
  RadioGroup2.ItemIndex := 1;
end;

procedure TForm1.RadioGroup1Click(Sender: TObject);
begin
  CategoryPanelGroup1.HeaderAlignment := TAlignment(RadioGroup1.ItemIndex);
end;

procedure TForm1.RadioGroup2Click(Sender: TObject);
begin
  CategoryPanelGroup1.GradientDirection := TGradientDirection(RadioGroup2.ItemIndex);
end;

end.

窗体文件:

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object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 209
  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 = 216
    Height = 209
    VertScrollBar.Tracking = True
    HeaderFont.Charset = DEFAULT_CHARSET
    HeaderFont.Color = clWindowText
    HeaderFont.Height = -11
    HeaderFont.Name = 'Tahoma'
    HeaderFont.Style = []
    TabOrder = 0
    object CategoryPanel1: TCategoryPanel
      Top = 0
      Caption = 'CategoryPanel1'
      TabOrder = 0
      ExplicitWidth = 174
    end
    object CategoryPanel2: TCategoryPanel
      Top = 200
      Caption = 'CategoryPanel2'
      TabOrder = 1
      ExplicitWidth = 174
    end
    object CategoryPanel3: TCategoryPanel
      Top = 400
      Caption = 'CategoryPanel3'
      TabOrder = 2
      ExplicitWidth = 174
    end
  end
  object RadioGroup1: TRadioGroup
    Left = 222
    Top = 9
    Width = 104
    Height = 97
    Caption = 'RadioGroup1'
    TabOrder = 1
    OnClick = RadioGroup1Click
  end
  object RadioGroup2: TRadioGroup
    Left = 222
    Top = 121
    Width = 104
    Height = 80
    Caption = 'RadioGroup2'
    TabOrder = 2
    OnClick = RadioGroup2Click
  end
end