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Home: Code Repository: Mastering Delphi 6

Chapter 06 - Project Odmenu

Project Structure

Odmenu.dpr
program ODMenu;

uses
  Forms,
  BitMenuF in 'BitMenuF.pas' {Form1};

{$R *.RES}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.
BitMenuF.pas
unit BitMenuF;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ExtCtrls, Menus;

type
  TForm1 = class(TForm)
    ShapeDemo: TShape;
    MainMenu1: TMainMenu;
    File1: TMenuItem;
    Exit1: TMenuItem;
    Shape1: TMenuItem;
    Ellipse1: TMenuItem;
    RoundRec1: TMenuItem;
    Rectang1: TMenuItem;
    Color1: TMenuItem;
    Red1: TMenuItem;
    Green1: TMenuItem;
    Blue1: TMenuItem;
    Help1: TMenuItem;
    About1: TMenuItem;
    procedure FormResize(Sender: TObject);
    procedure Exit1Click(Sender: TObject);
    procedure About1Click(Sender: TObject);
    procedure ColorClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Ellipse1Click(Sender: TObject);
    procedure RoundRec1Click(Sender: TObject);
    procedure Rectang1Click(Sender: TObject);
    procedure ColorMeasureItem(Sender: TObject; ACanvas: TCanvas;
      var Width, Height: Integer);
    procedure ColorDrawItem(Sender: TObject; ACanvas: TCanvas;
      ARect: TRect; Selected: Boolean);
    procedure ShapeMeasureItem(Sender: TObject; ACanvas: TCanvas;
      var Width, Height: Integer);
    procedure Ellipse1DrawItem(Sender: TObject; ACanvas: TCanvas;
      ARect: TRect; Selected: Boolean);
    procedure RoundRec1DrawItem(Sender: TObject; ACanvas: TCanvas;
      ARect: TRect; Selected: Boolean);
    procedure Rectang1DrawItem(Sender: TObject; ACanvas: TCanvas;
      ARect: TRect; Selected: Boolean);
  private
    { Private declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormResize(Sender: TObject);
begin
  ShapeDemo.SetBounds (ClientWidth div 6, ClientHeight div 6,
    2 * ClientWidth div 3, 2 * ClientHeight div 3);
end;

procedure TForm1.Exit1Click(Sender: TObject);
begin
  Close;
end;

procedure TForm1.About1Click(Sender: TObject);
begin
  MessageDlg ('Owner-draw menu example,'#13 +
    'from "Mastering Delphi" by Marco Cantý',
    mtInformation, [mbOK], 0);
end;

procedure TForm1.ColorClick(Sender: TObject);
begin
  ShapeDemo.Brush.Color :=
    (Sender as TComponent).Tag
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Blue1.Tag := clBlue;
  Red1.Tag := clRed;
  Green1.Tag := clGreen;
end;

procedure TForm1.Ellipse1Click(Sender: TObject);
begin
  ShapeDemo.Shape := stEllipse;
end;

procedure TForm1.RoundRec1Click(Sender: TObject);
begin
  ShapeDemo.Shape := stRoundRect;
end;

procedure TForm1.Rectang1Click(Sender: TObject);
begin
  ShapeDemo.Shape := stRectangle;
end;

procedure TForm1.ColorMeasureItem(Sender: TObject;
  ACanvas: TCanvas;
  var Width, Height: Integer);
begin
  Width := 80;
  Height := 30;
end;

procedure TForm1.ColorDrawItem(Sender: TObject;
  ACanvas: TCanvas; ARect: TRect; Selected: Boolean);
begin
  // set the background color and draw it
  if Selected then
    ACanvas.Brush.Color := clHighlight
  else
    ACanvas.Brush.Color := clMenu;
  ACanvas.FillRect (ARect);
  // show the color
  ACanvas.Brush.Color := (Sender as TComponent).Tag;
  InflateRect (ARect, -5, -5);
  ACanvas.Rectangle (ARect.Left, ARect.Top,
    ARect.Right, ARect.Bottom);
end;

procedure TForm1.ShapeMeasureItem(Sender: TObject; ACanvas: TCanvas;
  var Width, Height: Integer);
begin
  Width := 90;
  Height := 40;
end;

procedure TForm1.Ellipse1DrawItem(Sender: TObject; ACanvas: TCanvas;
  ARect: TRect; Selected: Boolean);
begin
  // set the background color and draw it
  if Selected then
    ACanvas.Brush.Color := clHighlight
  else
    ACanvas.Brush.Color := clMenu;
  ACanvas.FillRect (ARect);
  // draw the ellipse
  ACanvas.Brush.Color := clWhite;
  InflateRect (ARect, -5, -5);
  ACanvas.Ellipse (ARect.Left, ARect.Top,
    ARect.Right, ARect.Bottom);
end;

procedure TForm1.RoundRec1DrawItem(Sender: TObject; ACanvas: TCanvas;
  ARect: TRect; Selected: Boolean);
begin
  // set the background color and draw it
  if Selected then
    ACanvas.Brush.Color := clHighlight
  else
    ACanvas.Brush.Color := clMenu;
  ACanvas.FillRect (ARect);
  // draw the round rectangle
  ACanvas.Brush.Color := clWhite;
  InflateRect (ARect, -5, -5);
  ACanvas.RoundRect (ARect.Left, ARect.Top,
    ARect.Right, ARect.Bottom, 5, 5);
end;

procedure TForm1.Rectang1DrawItem(Sender: TObject; ACanvas: TCanvas;
  ARect: TRect; Selected: Boolean);
begin
  // set the background color and draw it
  if Selected then
    ACanvas.Brush.Color := clHighlight
  else
    ACanvas.Brush.Color := clMenu;
  ACanvas.FillRect (ARect);
  // draw the rectangle
  ACanvas.Brush.Color := clWhite;
  InflateRect (ARect, -5, -5);
  ACanvas.Rectangle (ARect.Left, ARect.Top,
    ARect.Right, ARect.Bottom);
end;

end.
BitMenuF.dfm
object Form1: TForm1
  Left = 244
  Top = 111
  Width = 425
  Height = 298
  Caption = 'ODMenu'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  Menu = MainMenu1
  OldCreateOrder = True
  OnCreate = FormCreate
  OnResize = FormResize
  PixelsPerInch = 96
  TextHeight = 13
  object ShapeDemo: TShape
    Left = 120
    Top = 72
    Width = 145
    Height = 81
    HelpType = htKeyword
    Shape = stEllipse
  end
  object MainMenu1: TMainMenu
    OwnerDraw = True
    Left = 56
    Top = 16
    object File1: TMenuItem
      Caption = '&File'
      object Exit1: TMenuItem
        Caption = 'E&xit'
        OnClick = Exit1Click
      end
    end
    object Shape1: TMenuItem
      Caption = '&Shape'
      object Ellipse1: TMenuItem
        Caption = 'Ellipse'
        OnClick = Ellipse1Click
        OnDrawItem = Ellipse1DrawItem
        OnMeasureItem = ShapeMeasureItem
      end
      object RoundRec1: TMenuItem
        Caption = 'RoundRec'
        OnClick = RoundRec1Click
        OnDrawItem = RoundRec1DrawItem
        OnMeasureItem = ShapeMeasureItem
      end
      object Rectang1: TMenuItem
        Caption = 'Rectang'
        OnClick = Rectang1Click
        OnDrawItem = Rectang1DrawItem
        OnMeasureItem = ShapeMeasureItem
      end
    end
    object Color1: TMenuItem
      Caption = '&Color'
      object Red1: TMenuItem
        Caption = 'Red'
        OnClick = ColorClick
        OnDrawItem = ColorDrawItem
        OnMeasureItem = ColorMeasureItem
      end
      object Green1: TMenuItem
        Caption = 'Green'
        OnClick = ColorClick
        OnDrawItem = ColorDrawItem
        OnMeasureItem = ColorMeasureItem
      end
      object Blue1: TMenuItem
        Caption = 'Blue'
        OnClick = ColorClick
        OnDrawItem = ColorDrawItem
        OnMeasureItem = ColorMeasureItem
      end
    end
    object Help1: TMenuItem
      Caption = '&Help'
      object About1: TMenuItem
        Caption = '&About...'
        OnClick = About1Click
      end
    end
  end
end