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{
*****************************************************************************
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
Author: Tomas Gregorovic
Abstract:
This units defines the Load Image Dialog (TGraphicPropertyEditorForm)
for graphic or picture property editor.
}
unit GraphicPropEdit;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils,
// LCL
Forms, Controls, Graphics, Dialogs, StdCtrls, ExtCtrls, ButtonPanel, ExtDlgs,
ActnList, StdActns, Clipbrd,
// IdeIntf
IDEDialogs, ObjInspStrConsts, IDEWindowIntf;
type
{ TGraphicPropertyEditorForm }
TGraphicPropertyEditorForm = class(TForm)
FileOpenAction: TAction;
FileSaveAction: TAction;
ClearAction: TEditDelete;
ActionList: TActionList;
CopyButton: TButton;
PasteButton: TButton;
CopyAction: TEditCopy;
PasteAction: TEditPaste;
OkCancelButtonPanel: TButtonPanel;
ImagePreview: TImage;
LoadButton: TButton;
LoadSaveBtnPanel: TPanel;
OpenDialog: TOpenPictureDialog;
SaveButton: TButton;
ClearButton: TButton;
GroupBox1: TGroupBox;
SaveDialog: TSavePictureDialog;
ScrollBox: TScrollBox;
procedure CopyActionExecute(Sender: TObject);
procedure CopyActionUpdate(Sender: TObject);
procedure FormClose(Sender: TObject; var {%H-}CloseAction: TCloseAction);
procedure ImagePreviewPaintBackground({%H-}ASender: TObject; ACanvas: TCanvas;
ARect: TRect);
procedure PasteActionExecute(Sender: TObject);
procedure PasteActionUpdate(Sender: TObject);
procedure ClearActionExecute(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FileOpenActionExecute(Sender: TObject);
procedure FileSaveActionExecute(Sender: TObject);
procedure FileSaveActionUpdate(Sender: TObject);
procedure PictureChanged(Sender: TObject);
procedure ScrollBoxResize(Sender: TObject);
private
FFileName: String;
FModified: Boolean;
function GetGraphic: TGraphic;
procedure SetGraphic(Value: TGraphic);
procedure SetCaptionDetail(Value: String);
public
property CaptionDetail: String write SetCaptionDetail;
property FileName: String read FFileName;
property Modified: Boolean read FModified;
property Graphic: TGraphic read GetGraphic write SetGraphic;
end;
implementation
{$R *.lfm}
{ TGraphicPropertyEditorForm }
procedure TGraphicPropertyEditorForm.FormCreate(Sender: TObject);
begin
Caption := oisLoadImageDialog;
GroupBox1.Caption:=oisPEPicture;
OkCancelButtonPanel.OKButton.Caption := oisOK;
OkCancelButtonPanel.CancelButton.Caption := oisCancel;
CopyAction.Caption := oiStdActEditCopyHeadLine;
PasteAction.Caption := oiStdActEditPasteHeadLine;
FileOpenAction.Caption := oisLoad;
FileSaveAction.Caption := oisSave;
ClearAction.Caption := oisClear;
OpenDialog.Title:=oisPEOpenImageFile;
SaveDialog.Title:=oisPESaveImageAs;
ImagePreview.OnPictureChanged:=@PictureChanged;
IDEDialogLayoutList.ApplyLayout(Self);
end;
procedure TGraphicPropertyEditorForm.FormClose(Sender: TObject;
var CloseAction: TCloseAction);
begin
IDEDialogLayoutList.SaveLayout(Self);
end;
procedure TGraphicPropertyEditorForm.ClearActionExecute(Sender: TObject);
begin
ImagePreview.Picture.Clear;
end;
procedure TGraphicPropertyEditorForm.CopyActionExecute(Sender: TObject);
begin
Clipboard.Assign(ImagePreview.Picture.Graphic);
end;
procedure TGraphicPropertyEditorForm.CopyActionUpdate(Sender: TObject);
begin
CopyAction.Enabled := ImagePreview.Picture.Graphic <> nil;
end;
procedure TGraphicPropertyEditorForm.ImagePreviewPaintBackground(
ASender: TObject; ACanvas: TCanvas; ARect: TRect);
const
cell=8; //8 pixels is usual checkers size
var
bmp: TBitmap;
i, j: integer;
begin
//Paint checkers BG picture for transparent image
bmp:= TBitmap.Create;
try
bmp.PixelFormat:= pf24bit;
bmp.SetSize(ARect.Right-ARect.Left, ARect.Bottom-ARect.Top);
bmp.Canvas.Brush.Color:= clWhite;
bmp.Canvas.FillRect(0, 0, bmp.Width, bmp.Height);
bmp.Canvas.Brush.Color:= clLtGray;
for i:= 0 to bmp.Width div cell do
for j:= 0 to bmp.Height div cell do
if not (Odd(i) xor Odd(j)) then
bmp.Canvas.FillRect(i*cell, j*cell, (i+1)*cell, (j+1)*cell);
ACanvas.CopyRect(ARect, bmp.Canvas, Rect(0, 0, bmp.Width, bmp.Height));
finally
FreeAndNil(bmp);
end;
end;
procedure TGraphicPropertyEditorForm.FileSaveActionUpdate(Sender: TObject);
begin
(Sender as TAction).Enabled := (Graphic <> nil) and (not Graphic.Empty);
end;
procedure TGraphicPropertyEditorForm.PasteActionExecute(Sender: TObject);
begin
ImagePreview.Picture.Assign(Clipboard);
end;
procedure TGraphicPropertyEditorForm.PasteActionUpdate(Sender: TObject);
begin
PasteAction.Enabled := Clipboard.HasPictureFormat;
end;
procedure TGraphicPropertyEditorForm.FileOpenActionExecute(Sender: TObject);
begin
InitIDEFileDialog(OpenDialog);
if OpenDialog.Execute then
begin
try
ImagePreview.Picture.LoadFromFile(OpenDialog.FileName);
FFileName := OpenDialog.FileName; // OnPictureChange clears the field.
except
on E: Exception do begin
MessageDlg(oisErrorLoadingImage,
Format(oisErrorLoadingImage2, [FileName, LineEnding, E.Message]),
mtError, [mbOk], 0);
exit;
end;
end;
end;
StoreIDEFileDialog(OpenDialog);
end;
procedure TGraphicPropertyEditorForm.PictureChanged(Sender: TObject);
begin
FModified := True;
FFileName := '';
if Graphic <> nil then
ScrollBox.Hint := Graphic.ClassName
else
ScrollBox.Hint := '';
ScrollBoxResize(Self);
end;
procedure TGraphicPropertyEditorForm.ScrollBoxResize(Sender: TObject);
begin
if ImagePreview.Width<ScrollBox.ClientWidth then
ImagePreview.Left:= (ScrollBox.ClientWidth-ImagePreview.Width) div 2
else
ImagePreview.Left:= 0;
if ImagePreview.Height<ScrollBox.ClientHeight then
ImagePreview.Top:= (ScrollBox.ClientHeight-ImagePreview.Height) div 2
else
ImagePreview.Top:= 0;
end;
procedure TGraphicPropertyEditorForm.FileSaveActionExecute(Sender: TObject);
begin
InitIDEFileDialog(SaveDialog);
if SaveDialog.Execute then
if SaveDialog.FilterIndex > 1 then
ImagePreview.Picture.SaveToFile(SaveDialog.FileName, SaveDialog.GetFilterExt)
else
ImagePreview.Picture.SaveToFile(SaveDialog.FileName);
StoreIDEFileDialog(SaveDialog);
end;
function TGraphicPropertyEditorForm.GetGraphic: TGraphic;
begin
Result := ImagePreview.Picture.Graphic;
end;
procedure TGraphicPropertyEditorForm.SetGraphic(Value: TGraphic);
begin
ImagePreview.Picture.Assign(Value);
FModified := False;
end;
procedure TGraphicPropertyEditorForm.SetCaptionDetail(Value: String);
begin
Caption := oisLoadImageDialog + ' - ' + Value;
end;
end.
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