{*******************************************************************}
{                                                                   }
{       Developer Express Visual Component Library                  }
{       ExpressPrinting System(tm) COMPONENT SUITE                  }
{                                                                   }
{       Copyright (C) 1998-2007 Developer Express Inc.              }
{       ALL RIGHTS RESERVED                                         }
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{   RESTRICTIONS                                                    }
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{   EXECUTABLE PROGRAM ONLY.                                        }
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{*******************************************************************}

unit dxPcPrVw;

interface

{$I cxVer.inc}

uses
  Graphics;

procedure dxShowPicturePreview(AGraphic: TGraphic);

implementation

uses
  Classes, SysUtils, Controls, ComCtrls, cxClasses, dxPSUtl, dxPSRes, dxPSImgs, 
  dxPSForm, dxExtCtrls;

type
  TdxfmPicturePreview = class(TCustomdxPSForm)
  private
    FPictureBox: TdxPSImageScrollBox;
    FStatusBar: TStatusBar;
    function GetGraphic: TGraphic;
    function GetHasGraphic: Boolean;
  protected
    procedure KeyPress(var Key: Char); override;
    procedure CreateControls;
    procedure UpdateControls;
    
    property Graphic: TGraphic read GetGraphic;
    property HasGraphic: Boolean read GetHasGraphic;
  public
    constructor CreateNew(AOwner: TComponent; Dummy: Integer = 0); override;
    procedure Execute(AGraphic: TGraphic);
   
    property PreviewBox: TdxPSImageScrollBox read FPictureBox;
    property StatusBar: TStatusBar read FStatusBar;
  end;

procedure dxShowPicturePreview(AGraphic: TGraphic);
begin
  with TdxfmPicturePreview.CreateNew(nil) do
  try
    Execute(AGraphic);
  finally
    Free;
  end;
end;

constructor TdxfmPicturePreview.CreateNew(AOwner: TComponent; Dummy: Integer = 0);
begin
  inherited;
  Caption := cxGetResourceString(@sdxFSPCaption);
  Constraints.MinHeight := 200;
  Constraints.MinWidth := 200;
  Icon_LoadFromResourceName(Icon, IDB_DXPSPREVIEW);
  
  CreateControls;
end;

procedure TdxfmPicturePreview.Execute(AGraphic: TGraphic);
begin
  PreviewBox.Picture.Assign(AGraphic);
  UpdateControls;
  
  ShowModal;
end;

procedure TdxfmPicturePreview.KeyPress(var Key: Char);
begin
  if Key = #27 then 
    Close
  else
    inherited;  
end;

procedure TdxfmPicturePreview.CreateControls;
begin
  FStatusBar := TStatusBar.Create(Self);
  with StatusBar do
  begin
    Parent := Self;
    Align := alBottom;
    with Panels.Add do Width := 250;
    with Panels.Add do Width := -1;
  end;
  
  FPictureBox := TdxPSImageScrollBox.Create(Self);
  with FPictureBox do
  begin
    Parent := Self;
    Align := alClient;
    BuiltInMenuItemsVisibility := BuiltInMenuItemsVisibility - [biiPreview];
  end;
end;

procedure TdxfmPicturePreview.UpdateControls;
begin
  Width := 400;
  Height := 400;
  
  if HasGraphic then 
  begin
    ClientWidth := Graphic.Width + 10;
    ClientHeight := Graphic.Height + StatusBar.Height + 10;
    with dxPSUtl.GetDesktopWorkArea do 
    begin
      if Width > Right - Left then Width := Right - Left;
      if Height > Bottom - Top then Height := Bottom - Top;
      Self.Left := (Right - Left - Width) div 2;
      Self.Top := (Bottom - Top - Height) div 2;
    end;
    StatusBar.Panels[0].Text := Format('%s: %d   %s: %d', 
     [cxGetResourceString(@sdxWidth), Graphic.Width, 
      cxGetResourceString(@sdxHeight), Graphic.Height]);
  end
  else
    PreviewBox.HintText := cxGetResourceString(@sdxNone);
end;

function TdxfmPicturePreview.GetGraphic: TGraphic;
begin
  Result := PreviewBox.Picture.Graphic;
end;

function TdxfmPicturePreview.GetHasGraphic: Boolean;
begin
  Result := PreviewBox.HasGraphic;
end;

end.