Home: Code Repository: Mastering Delphi 5

Project IMAGEV

Project Structure

IMAGEV.DPR
IMAGEF.PAS
IMAGEF.DFM

program Imagev;

uses
  Forms,
  ImageF in 'ImageF.pas' {ViewerForm};

{$R *.RES}

begin
  Application.CreateForm(TViewerForm, ViewerForm);
  Application.Run;
end.

unit ImageF;

interface

uses Windows, Classes, Graphics, Forms, Controls, Menus,
  Dialogs, StdCtrls, ExtCtrls;

type
  TViewerForm = class(TForm)
    MainMenu1: TMainMenu;
    File1: TMenuItem;
    Open1: TMenuItem;
    N1: TMenuItem;
    Exit1: TMenuItem;
    Help1: TMenuItem;
    AboutImageViewer1: TMenuItem;
    OpenDialog1: TOpenDialog;
    Options1: TMenuItem;
    Stretch1: TMenuItem;
    Image1: TImage;
    Center1: TMenuItem;
    procedure Open1Click(Sender: TObject);
    procedure Stretch1Click(Sender: TObject);
    procedure Exit1Click(Sender: TObject);
    procedure AboutImageViewer1Click(Sender: TObject);
    procedure Center1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  ViewerForm: TViewerForm;

implementation

              {$R *.DFM}

procedure TViewerForm.Open1Click(Sender: TObject);
begin
  if OpenDialog1.Execute then
  begin
    Image1.Picture.LoadFromFile (OpenDialog1.FileName);
    Caption := 'Image Viewer - ' + OpenDialog1.FileName;
  end;
end;

procedure TViewerForm.Stretch1Click(Sender: TObject);
begin
  Image1.Stretch := not Image1.Stretch;
  Stretch1.Checked := Image1.Stretch;
end;

procedure TViewerForm.Center1Click(Sender: TObject);
begin
  Image1.Center := not Image1.Center;
  Center1.Checked := Image1.Center;
end;

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

procedure TViewerForm.AboutImageViewer1Click(Sender: TObject);
begin
  MessageDlg ('Image Viewer is an example'
    + #13'of the book "Mastering Delphi"'
    + #13'written by Marco Cantù',
    mtInformation, [mbOk], 0);
end;

end.

object ViewerForm: TViewerForm
  Left = 182
  Top = 149
  Width = 434
  Height = 299
  Caption = 'Image Viewer'
  Font.Color = clWindowText
  Font.Height = -13
  Font.Name = 'System'
  Font.Style = []
  Menu = MainMenu1
  PixelsPerInch = 96
  TextHeight = 16
  object Image1: TImage
    Left = 0
    Top = 0
    Width = 426
    Height = 253
    Align = alClient
  end
  object MainMenu1: TMainMenu
    Left = 16
    Top = 16
    object File1: TMenuItem
      Caption = '&File'
      object Open1: TMenuItem
        Caption = '&Open...'
        OnClick = Open1Click
      end
      object N1: TMenuItem
        Caption = '-'
      end
      object Exit1: TMenuItem
        Caption = '&Exit'
        OnClick = Exit1Click
      end
    end
    object Options1: TMenuItem
      Caption = '&Options'
      object Stretch1: TMenuItem
        Caption = '&Stretch'
        OnClick = Stretch1Click
      end
      object Center1: TMenuItem
        Caption = '&Center'
        OnClick = Center1Click
      end
    end
    object Help1: TMenuItem
      Caption = '&Help'
      object AboutImageViewer1: TMenuItem
        Caption = '&About Image Viewer...'
        OnClick = AboutImageViewer1Click
      end
    end
  end
  object OpenDialog1: TOpenDialog
    FileEditStyle = fsEdit
    Filter = 'Bitmap (*.bmp)|*.bmp|Icon (*.ico)|*.ico|Metafile (*.wmf)|*.wmf'
    Options = [ofHideReadOnly, ofPathMustExist, ofFileMustExist]
    Left = 56
    Top = 16
  end
end