115 lines
3.0 KiB
ObjectPascal
115 lines
3.0 KiB
ObjectPascal
{******************************************************************
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JEDI-VCL Demo
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Copyright (C) 2002 Project JEDI
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Original author:
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Contributor(s):
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You may retrieve the latest version of this file at the JEDI-JVCL
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home page, located at http://jvcl.sourceforge.net
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The contents of this file are used with permission, subject to
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the Mozilla Public License Version 1.1 (the "License"); you may
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not use this file except in compliance with the License. You may
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obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1_1Final.html
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Software distributed under the License is distributed on an
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"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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implied. See the License for the specific language governing
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rights and limitations under the License.
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******************************************************************}
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unit JvWndProcHookDemoMainFormU;
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interface
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uses
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Windows, Messages, SysUtils, Classes, Controls, Forms, Dialogs, StdCtrls,
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JvCaptionButton ;
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type
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TJvWndProcHookDemoMainForm = class(TForm)
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btnAdd: TButton;
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btnDelete: TButton;
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btnRecreateWnd: TButton;
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lbButtons: TListBox;
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Label1: TLabel;
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procedure btnAddClick(Sender: TObject);
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procedure btnDeleteClick(Sender: TObject);
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procedure btnRecreateWndClick(Sender: TObject);
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private
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{ Private declarations }
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FButtonCount: integer;
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procedure DoButtonClick(Sender: TObject);
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function UniqueName(const BaseName: string): string;
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end;
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var
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JvWndProcHookDemoMainForm: TJvWndProcHookDemoMainForm;
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implementation
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{$R *.dfm}
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procedure TJvWndProcHookDemoMainForm.DoButtonClick(Sender: TObject);
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begin
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Caption := Format('Button "%s" clicked', [(Sender as TJvCaptionButton).Caption]);
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end;
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function TJvWndProcHookDemoMainForm.UniqueName(const BaseName: string): string;
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var i: integer;
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begin
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i := 1;
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Result := BaseName + IntToStr(i);
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while FindComponent(Result) <> nil do
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begin
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Inc(i);
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Result := BaseName + IntToStr(i);
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if i > 2000 then
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raise Exception.Create('Unable to create unique name!');
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end;
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end;
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procedure TJvWndProcHookDemoMainForm.btnAddClick(Sender: TObject);
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var b: TJvCaptionButton;
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begin
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B := TJvCaptionButton.Create(self);
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B.OnClick := DoButtonClick;
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B.Caption := Char(Ord(FButtonCount) + Ord('A'));
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B.Name := UniqueName('JvCaptionButton');
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B.ButtonLeft := B.ButtonLeft + FButtonCount * B.ButtonWidth + 2;
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lbButtons.Items.AddObject(B.Caption,B);
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Inc(FButtonCount);
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end;
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procedure TJvWndProcHookDemoMainForm.btnDeleteClick(Sender: TObject);
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var i: integer;
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begin
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i := lbButtons.ItemIndex;
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if (i > -1) then
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begin
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TJvCaptionButton(lbButtons.Items.Objects[i]).Free;
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lbButtons.Items.Delete(i);
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end;
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if i >= lbButtons.Items.Count then
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Dec(i);
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lbButtons.ItemIndex := i;
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if lbButtons.Items.Count = 0 then
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FButtonCount := 0;
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end;
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procedure TJvWndProcHookDemoMainForm.btnRecreateWndClick(Sender: TObject);
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begin
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RecreateWnd;
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end;
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end.
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