401 lines
10 KiB
ObjectPascal
401 lines
10 KiB
ObjectPascal
{
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:: Contains the dialog presented for the Container's Graphics property
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::
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:: Last changed: $Date$
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:: Revision: $Rev$
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:: Author: $Author$
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}
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unit X2CLGraphicsEditor;
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interface
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uses
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ActnList,
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Classes,
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ComCtrls,
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Controls,
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DesignIntf,
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Dialogs,
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ExtCtrls,
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ExtDlgs,
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Forms,
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ImgList,
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StdCtrls,
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ToolWin,
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X2CLGraphicList;
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type
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TGraphicsEditorForm = class(TForm)
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actAdd: TAction;
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actClear: TAction;
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actDelete: TAction;
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actDown: TAction;
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actOpen: TAction;
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actSave: TAction;
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actUp: TAction;
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alGraphics: TActionList;
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dlgOpen: TOpenPictureDialog;
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dlgSave: TSavePictureDialog;
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ilsIcons: TImageList;
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imgPreview: TImage;
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lblName: TLabel;
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lstGraphics: TListBox;
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pnlGraphics: TPanel;
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pnlImage: TPanel;
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pnlProperties: TPanel;
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sbImage: TScrollBox;
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spltGraphics: TSplitter;
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tbClear: TToolButton;
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tbDelete: TToolButton;
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tbDown: TToolButton;
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tbGraphics: TToolBar;
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tbImage: TToolBar;
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tbNew: TToolButton;
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tbOpen: TToolButton;
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tbSave: TToolButton;
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tbSep1: TToolButton;
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tbUp: TToolButton;
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txtName: TEdit;
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procedure FormClose(Sender: TObject; var Action: TCloseAction);
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procedure lstGraphicsClick(Sender: TObject);
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procedure txtNameChange(Sender: TObject);
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procedure actAddExecute(Sender: TObject);
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procedure actDeleteExecute(Sender: TObject);
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procedure actUpExecute(Sender: TObject);
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procedure actDownExecute(Sender: TObject);
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procedure actOpenExecute(Sender: TObject);
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procedure actSaveExecute(Sender: TObject);
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procedure actClearExecute(Sender: TObject);
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private
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FComponent: TX2GraphicContainer;
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FComponentDesigner: IDesigner;
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FUpdating: Boolean;
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procedure InternalExecute(const AComponent: TComponent; const ADesigner: IDesigner);
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procedure ItemChanged(AUpdatePreview: Boolean = True);
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procedure UpdateUI();
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procedure UpdatePreview();
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function Active(out AIndex: Integer; out AGraphic: TX2GraphicContainerItem): Boolean;
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protected
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procedure Notification(AComponent: TComponent; Operation: TOperation); override;
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public
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class procedure Execute(const AComponent: TComponent; const ADesigner: IDesigner);
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end;
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implementation
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uses
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Graphics,
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SysUtils;
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var
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EditorInstance: TGraphicsEditorForm;
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{$R *.dfm}
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{ TGraphicsEditorForm }
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class procedure TGraphicsEditorForm.Execute(const AComponent: TComponent; const ADesigner: IDesigner);
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begin
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if not Assigned(EditorInstance) then
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EditorInstance := TGraphicsEditorForm.Create(Application);
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EditorInstance.InternalExecute(AComponent, ADesigner);
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end;
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procedure TGraphicsEditorForm.InternalExecute(const AComponent: TComponent; const ADesigner: IDesigner);
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var
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graphicIndex: Integer;
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begin
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FComponent := TX2GraphicContainer(AComponent);
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FComponent.FreeNotification(Self);
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FComponentDesigner := ADesigner;
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Caption := Format('%s Graphics', [FComponent.Name]);
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// Fill graphics list
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with lstGraphics.Items do
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begin
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BeginUpdate();
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try
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Clear();
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for graphicIndex := 0 to FComponent.GraphicCount - 1 do
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AddObject(FComponent.Graphics[graphicIndex].PictureName,
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FComponent.Graphics[graphicIndex]);
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finally
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EndUpdate();
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end;
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lstGraphics.ItemIndex := 0;
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end;
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UpdateUI();
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UpdatePreview();
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Show();
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end;
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procedure TGraphicsEditorForm.FormClose(Sender: TObject; var Action: TCloseAction);
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begin
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Action := caFree;
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if Self = EditorInstance then
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EditorInstance := nil;
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if Assigned(FComponent) then
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FComponent.RemoveFreeNotification(Self);
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end;
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procedure TGraphicsEditorForm.ItemChanged(AUpdatePreview: Boolean);
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begin
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if Assigned(FComponentDesigner) then
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FComponentDesigner.Modified();
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UpdateUI();
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if AUpdatePreview then
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UpdatePreview();
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end;
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procedure TGraphicsEditorForm.UpdateUI();
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var
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enabled: Boolean;
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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enabled := Active(index, graphic);
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actDelete.Enabled := enabled;
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actOpen.Enabled := enabled;
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if enabled then
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enabled := Assigned(graphic.Picture.Graphic)
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else
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enabled := False;
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actSave.Enabled := enabled;
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actClear.Enabled := enabled;
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actUp.Enabled := enabled and (index > 0);
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actDown.Enabled := enabled and (index < Pred(lstGraphics.Items.Count));
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end;
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procedure TGraphicsEditorForm.UpdatePreview();
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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FUpdating := True;
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try
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if Active(index, graphic) then
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begin
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imgPreview.Picture.Assign(graphic.Picture);
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txtName.Text := graphic.PictureName;
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end;
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finally
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FUpdating := False;
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end;
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end;
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function TGraphicsEditorForm.Active(out AIndex: Integer; out AGraphic: TX2GraphicContainerItem): Boolean;
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begin
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Result := False;
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AIndex := lstGraphics.ItemIndex;
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if AIndex = -1 then
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exit;
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AGraphic := TX2GraphicContainerItem(lstGraphics.Items.Objects[AIndex]);
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Result := Assigned(AGraphic);
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end;
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procedure TGraphicsEditorForm.lstGraphicsClick(Sender: TObject);
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begin
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UpdateUI();
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UpdatePreview();
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end;
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procedure TGraphicsEditorForm.txtNameChange(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if FUpdating then
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Exit;
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if Active(index, graphic) then
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begin
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graphic.PictureName := txtName.Text;
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lstGraphics.Items[index] := graphic.PictureName;
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ItemChanged(False);
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end;
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end;
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procedure TGraphicsEditorForm.actAddExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if Assigned(FComponentDesigner) then
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begin
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graphic := TX2GraphicContainerItem(FComponentDesigner.CreateComponent(TX2GraphicContainerItem, nil, 0, 0, 0, 0));
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if Assigned(graphic) then
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begin
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graphic.Container := FComponent;
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index := lstGraphics.Items.AddObject(graphic.PictureName,
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graphic);
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lstGraphics.ItemIndex := index;
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ItemChanged();
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actOpen.Execute();
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end else
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raise Exception.Create('Failed to create TX2GraphicContainerItem!');
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end else
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raise Exception.Create('Designer not found!');
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end;
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procedure TGraphicsEditorForm.actDeleteExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if Active(index, graphic) then
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begin
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{ First attempt to remove the component; this will raise an exception
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if it's not allowed, for example due to it being introduced in
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an ancestor. }
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graphic.Free();
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lstGraphics.Items.Delete(index);
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if index > Pred(lstGraphics.Items.Count) then
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index := Pred(lstGraphics.Items.Count);
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lstGraphics.ItemIndex := index;
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ItemChanged();
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end;
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end;
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procedure TGraphicsEditorForm.actUpExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if Active(index, graphic) then
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if index > 0 then
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begin
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lstGraphics.Items.Move(index, Pred(index));
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graphic.Index := Pred(index);
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lstGraphics.ItemIndex := Pred(index);
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ItemChanged(False);
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end;
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end;
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procedure TGraphicsEditorForm.actDownExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if Active(index, graphic) then
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if index < Pred(lstGraphics.Items.Count) then
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begin
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lstGraphics.Items.Move(index, index + 1);
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graphic.Index := Succ(index);
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lstGraphics.ItemIndex := Succ(index);
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ItemChanged(False);
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end;
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end;
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procedure TGraphicsEditorForm.actOpenExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if Active(index, graphic) then
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begin
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dlgOpen.Filter := GraphicFilter(TGraphic);
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if dlgOpen.Execute() then
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begin
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graphic.Picture.LoadFromFile(dlgOpen.FileName);
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if Length(graphic.PictureName) = 0 then
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graphic.PictureName := ChangeFileExt(ExtractFileName(dlgOpen.FileName), '');
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ItemChanged();
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end;
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end;
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end;
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procedure TGraphicsEditorForm.actSaveExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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graphicClass: TGraphicClass;
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begin
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if Active(index, graphic) then
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if Assigned(graphic.Picture.Graphic) then begin
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graphicClass := TGraphicClass(graphic.Picture.Graphic.ClassType);
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dlgSave.Filter := GraphicFilter(graphicClass);
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dlgSave.FileName := ChangeFileExt(graphic.PictureName, '.' + GraphicExtension(graphicClass));
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if dlgSave.Execute() then
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graphic.Picture.SaveToFile(dlgSave.FileName);
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end;
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end;
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procedure TGraphicsEditorForm.actClearExecute(Sender: TObject);
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var
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index: Integer;
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graphic: TX2GraphicContainerItem;
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begin
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if Active(index, graphic) then
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begin
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graphic.Picture.Assign(nil);
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ItemChanged();
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end;
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end;
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procedure TGraphicsEditorForm.Notification(AComponent: TComponent; Operation: TOperation);
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begin
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inherited;
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if (Operation = opRemove) and (AComponent = FComponent) then
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begin
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FComponent := nil;
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Close();
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end;
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end;
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end.
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