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{ $Id: gtkwsbuttons.pp 21838 2009-09-23 12:27:47Z vincents $}
{
*****************************************************************************
* GtkWSButtons.pp *
* --------------- *
* *
* *
*****************************************************************************
*****************************************************************************
* *
* This file is part of the Lazarus Component Library (LCL) *
* *
* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
* for details about the copyright. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* *
*****************************************************************************
}
unit GtkWSButtons;
{$mode objfpc}{$H+}
interface
uses
// libs
{$IFDEF GTK2}
Gtk2, gdk2, gdk2Pixbuf,
{$ELSE}
GLib, Gtk, gdk, gdkPixbuf, Gtk1WSPrivate,
{$ENDIF}
// LCL
Classes, LCLType, Controls, Graphics, GraphType, Buttons,
// widgetset
WSButtons, WSProc,
// interface
GtkDef, GtkExtra;
type
PBitBtnWidgetInfo = ^TBitBtnWidgetInfo;
TBitBtnWidgetInfo = record
LabelWidget: Pointer;
ImageWidget: Pointer;
SpaceWidget: Pointer;
AlignWidget: Pointer;
TableWidget: Pointer;
end;
{ TGtkWSBitBtn }
TGtkWSBitBtn = class(TWSBitBtn)
private
protected
class procedure UpdateGlyph(const ABitBtn: TCustomBitBtn; const AValue: TButtonGlyph; const AButtonState: TButtonState); virtual;
class procedure UpdateLayout(const AInfo: PBitBtnWidgetInfo; const ALayout: TButtonLayout; const AMargin: Integer);
class procedure UpdateMargin(const AInfo: PBitBtnWidgetInfo; const ALayout: TButtonLayout; const AMargin: Integer);
class procedure SetCallbacks(const AGtkWidget: PGtkWidget; const AWidgetInfo: PWidgetInfo); virtual;
published
class function CreateHandle(const AWinControl: TWinControl; const AParams: TCreateParams): TLCLIntfHandle; override;
class procedure SetGlyph(const ABitBtn: TCustomBitBtn; const AValue: TButtonGlyph); override;
class procedure SetLayout(const ABitBtn: TCustomBitBtn; const AValue: TButtonLayout); override;
class procedure SetMargin(const ABitBtn: TCustomBitBtn; const AValue: Integer); override;
class procedure SetSpacing(const ABitBtn: TCustomBitBtn; const AValue: Integer); override;
class procedure SetText(const AWinControl: TWinControl; const AText: String); override;
class procedure SetColor(const AWinControl: TWinControl); override;
class procedure SetFont(const AWinControl: TWinControl; const AFont: TFont); override;
end;
TGtkWSBitBtnClass = class of TGtkWSBitBtn;
{ TGtkWSSpeedButton }
TGtkWSSpeedButton = class(TWSSpeedButton)
published
end;
implementation
uses
GtkProc, GtkInt, GtkWSStdCtrls;
const
GtkStateToButtonState: array[GTK_STATE_NORMAL..GTK_STATE_INSENSITIVE] of TButtonState =
(
{GTK_STATE_NORMAL } bsUp,
{GTK_STATE_ACTIVE } bsDown,
{GTK_STATE_PRELIGHT } bsHot,
{GTK_STATE_SELECTED } bsDown,
{GTK_STATE_INSENSITIVE} bsDisabled
);
type
TCustomBitBtnAccess = class(TCustomBitBtn)
end;
procedure GtkWSBitBtn_StateChanged(AWidget: PGtkWidget; AState: TGtkStateType; AInfo: PWidgetInfo); cdecl;
begin
//WriteLn(Astate, ' :: ', GTK_WIDGET_STATE(AWidget));
TGtkWSBitBtnClass(TCustomBitBtn(AInfo^.LCLObject).WidgetSetClass).UpdateGlyph(
TBitBtn(AInfo^.LCLObject),
TCustomBitBtnAccess(AInfo^.LCLObject).FButtonGlyph,
GtkStateToButtonState[GTK_WIDGET_STATE(AWidget)]);
end;
{ TGtkWSBitBtn }
{
The interiour of TBitBtn is created with a 4X4 table
Depending in how the image and label are aligned, only a
columns or rows are used (like a 4x1 or 1x4 table).
This way the table doesn't have to be recreated on changes.
So there are 4 positions 0, 1, 2, 3.
Positions 1 and 2 are used for the label and image.
Since this is always the case, spacing can be implemented
by setting the spacing of row/col 1
To get a margin, a gtkInvisible is needed for bottom and
right, so the invisible is always in position 3.
}
class function TGtkWSBitBtn.CreateHandle(const AWinControl: TWinControl;
const AParams: TCreateParams): TLCLIntfHandle;
var
BitBtn: TCustomBitBtn;
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
Allocation: TGTKAllocation;
begin
BitBtn := AWinControl as TCustomBitBtn;
Result := TLCLIntfHandle(PtrUInt(gtk_button_new));
if Result = 0 then Exit;
{$IFDEF DebugLCLComponents}
DebugGtkWidgets.MarkCreated(Pointer(Result),dbgsName(AWinControl));
{$ENDIF}
WidgetInfo := CreateWidgetInfo(Pointer(Result), BitBtn, AParams);
New(BitBtnInfo);
FillChar(BitBtnInfo^, SizeOf(BitBtnInfo^), 0);
WidgetInfo^.UserData := BitBtnInfo;
WidgetInfo^.DataOwner := True;
BitBtnInfo^.AlignWidget := gtk_alignment_new(0.5, 0.5, 0, 0);
gtk_container_add(Pointer(Result), BitBtnInfo^.AlignWidget);
BitBtnInfo^.TableWidget := gtk_table_new(4, 4, False);
gtk_container_add(BitBtnInfo^.AlignWidget, BitBtnInfo^.TableWidget);
BitBtnInfo^.LabelWidget := gtk_label_new('bitbtn');
gtk_table_attach(BitBtnInfo^.TableWidget, BitBtnInfo^.LabelWidget,
2, 3, 0, 4, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
BitBtnInfo^.SpaceWidget := nil;
BitBtnInfo^.ImageWidget := nil;
gtk_widget_show(BitBtnInfo^.AlignWidget);
gtk_widget_show(BitBtnInfo^.TableWidget);
gtk_widget_show(BitBtnInfo^.LabelWidget);
Allocation.X := AParams.X;
Allocation.Y := AParams.Y;
Allocation.Width := AParams.Width;
Allocation.Height := AParams.Height;
gtk_widget_size_allocate(PGtkWidget(Result), @Allocation);
Set_RC_Name(AWinControl, PGtkWidget(Result));
SetCallbacks(PGtkWidget(Result), WidgetInfo);
end;
class procedure TGtkWSBitBtn.SetGlyph(const ABitBtn: TCustomBitBtn;
const AValue: TButtonGlyph);
begin
if not WSCheckHandleAllocated(ABitBtn, 'SetGlyph')
then Exit;
UpdateGlyph(ABitBtn, AValue, GtkStateToButtonState[GTK_WIDGET_STATE(PGtkWidget(ABitBtn.Handle))]);
end;
class procedure TGtkWSBitBtn.SetLayout(const ABitBtn: TCustomBitBtn;
const AValue: TButtonLayout);
var
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
begin
if not WSCheckHandleAllocated(ABitBtn, 'SetLayout')
then Exit;
WidgetInfo := GetWidgetInfo(Pointer(ABitBtn.Handle));
BitBtnInfo := WidgetInfo^.UserData;
UpdateLayout(BitBtnInfo, AValue, ABitBtn.Margin);
end;
class procedure TGtkWSBitBtn.SetMargin(const ABitBtn: TCustomBitBtn;
const AValue: Integer);
var
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
begin
if not WSCheckHandleAllocated(ABitBtn, 'SetMargin')
then Exit;
WidgetInfo := GetWidgetInfo(Pointer(ABitBtn.Handle));
BitBtnInfo := WidgetInfo^.UserData;
UpdateMargin(BitBtnInfo, ABitBtn.Layout, AValue);
end;
class procedure TGtkWSBitBtn.SetSpacing(const ABitBtn: TCustomBitBtn;
const AValue: Integer);
var
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
begin
if not WSCheckHandleAllocated(ABitBtn, 'SetSpacing')
then Exit;
WidgetInfo := GetWidgetInfo(Pointer(ABitBtn.Handle));
BitBtnInfo := WidgetInfo^.UserData;
gtk_table_set_col_spacing(BitBtnInfo^.TableWidget, 1, AValue);
gtk_table_set_row_spacing(BitBtnInfo^.TableWidget, 1, AValue);
end;
class procedure TGtkWSBitBtn.SetText(const AWinControl: TWinControl;
const AText: String);
var
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
begin
if not WSCheckHandleAllocated(AWincontrol, 'SetText')
then Exit;
WidgetInfo := GetWidgetInfo(Pointer(AWinControl.Handle));
BitBtnInfo := WidgetInfo^.UserData;
if AText = '' then
begin
gtk_container_remove(BitBtnInfo^.TableWidget, BitBtnInfo^.LabelWidget);
BitBtnInfo^.LabelWidget := nil;
end
else
begin
if BitBtnInfo^.LabelWidget = nil then
begin
BitBtnInfo^.LabelWidget := gtk_label_new(nil);
gtk_widget_show(BitBtnInfo^.LabelWidget);
end;
GtkWidgetSet.SetLabelCaption(BitBtnInfo^.LabelWidget, AText
{$IFDEF Gtk1},AWinControl,WidgetInfo^.CoreWidget, 'clicked'{$ENDIF});
end;
UpdateLayout(BitBtnInfo, TBitBtn(AWincontrol).Layout, TBitBtn(AWincontrol).Margin);
end;
class procedure TGtkWSBitBtn.SetColor(const AWinControl: TWinControl);
var
Widget: PGTKWidget;
begin
if not AWinControl.HandleAllocated then exit;
Widget:= PGtkWidget(AWinControl.Handle);
GtkWidgetSet.SetWidgetColor(Widget, clNone, AWinControl.color,
[GTK_STATE_NORMAL,GTK_STATE_ACTIVE,GTK_STATE_PRELIGHT,GTK_STATE_SELECTED]);
end;
class procedure TGtkWSBitBtn.SetFont(const AWinControl: TWinControl;
const AFont: TFont);
var
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
Widget: PGTKWidget;
begin
if not AWinControl.HandleAllocated then exit;
Widget:= PGtkWidget(AWinControl.Handle);
WidgetInfo := GetWidgetInfo(Widget);
BitBtnInfo := WidgetInfo^.UserData;
if (BitBtnInfo=nil) or (BitBtnInfo^.LabelWidget = nil) then Exit;
GtkWidgetSet.SetWidgetColor(BitBtnInfo^.LabelWidget, AFont.Color,
clNone,
[GTK_STATE_NORMAL,GTK_STATE_ACTIVE,GTK_STATE_PRELIGHT,GTK_STATE_SELECTED]);
GtkWidgetSet.SetWidgetFont(BitBtnInfo^.LabelWidget, AFont);
end;
class procedure TGtkWSBitBtn.UpdateGlyph(const ABitBtn: TCustomBitBtn;
const AValue: TButtonGlyph; const AButtonState: TButtonState);
var
WidgetInfo: PWidgetInfo;
BitBtnInfo: PBitBtnWidgetInfo;
GDIObject: PGDIObject;
Pixmap: PGdkPixmap;
Pixbuf: PGdkPixbuf;
Mask: PGdkBitmap;
AGlyph: TBitmap;
AIndex: Integer;
AEffect: TGraphicsDrawEffect;
begin
WidgetInfo := GetWidgetInfo(Pointer(ABitBtn.Handle));
BitBtnInfo := WidgetInfo^.UserData;
if ABitBtn.CanShowGlyph then
begin
AGlyph := TBitmap.Create;
AValue.GetImageIndexAndEffect(AButtonState, AIndex, AEffect);
if (AIndex <> -1) and (AValue.Images <> nil) then
AValue.Images.GetBitmap(AIndex, AGlyph, AEffect);
end
else
AGlyph := nil;
// check if an image is needed
if (AGlyph = nil) or AGlyph.Empty
then begin
if BitBtnInfo^.ImageWidget <> nil
then begin
gtk_container_remove(BitBtnInfo^.TableWidget, BitBtnInfo^.ImageWidget);
BitBtnInfo^.ImageWidget := nil;
end;
AGlyph.Free;
Exit;
end;
GDIObject := PGDIObject(AGlyph.Handle);
if GDIObject^.GDIBitmapType = gbPixbuf then
begin
Pixbuf := GDIObject^.GDIPixbufObject;
Pixmap := nil;
Mask := nil;
gdk_pixbuf_render_pixmap_and_mask(Pixbuf, Pixmap, Mask, $80);
end
else
begin
Pixmap := GDIObject^.GDIPixmapObject.Image;
Mask := CreateGdkMaskBitmap(AGlyph.Handle, AGlyph.MaskHandle);
end;
// check for image
if BitBtnInfo^.ImageWidget = nil
then begin
BitBtnInfo^.ImageWidget := gtk_pixmap_new(Pixmap, Mask);
gtk_widget_show(BitBtnInfo^.ImageWidget);
UpdateLayout(BitBtnInfo, ABitBtn.Layout, ABitBtn.Margin);
end
else
gtk_pixmap_set(BitBtnInfo^.ImageWidget, Pixmap, Mask);
gdk_pixmap_unref(Mask);
if Pixmap <> GDIObject^.GDIPixmapObject.Image then
gdk_pixmap_unref(Pixmap);
AGlyph.Free;
end;
class procedure TGtkWSBitBtn.UpdateLayout(const AInfo: PBitBtnWidgetInfo;
const ALayout: TButtonLayout; const AMargin: Integer);
begin
if (AInfo^.ImageWidget = nil) and (AMargin < 0) then Exit; // nothing to do
// add references and remove it from the table
if AInfo^.LabelWidget <> nil then
begin
gtk_object_ref(AInfo^.LabelWidget);
if PGtkWidget(AInfo^.LabelWidget)^.Parent <> nil then
gtk_container_remove(AInfo^.TableWidget, AInfo^.LabelWidget);
end;
if AInfo^.ImageWidget <> nil then
begin
gtk_object_ref(AInfo^.ImageWidget);
if PGtkWidget(AInfo^.ImageWidget)^.Parent <> nil then
gtk_container_remove(AInfo^.TableWidget, AInfo^.ImageWidget);
end;
if AInfo^.SpaceWidget <> nil then
begin
gtk_object_ref(AInfo^.SpaceWidget);
if PGtkWidget(AInfo^.SpaceWidget)^.Parent <> nil then
gtk_container_remove(AInfo^.TableWidget, AInfo^.SpaceWidget);
end;
if ((AInfo^.LabelWidget = nil) or (PGtkLabel(AInfo^.LabelWidget)^.{$ifdef gtk1}thelabel{$else}text{$endif} = '')) and
(AInfo^.ImageWidget <> nil) then
begin
gtk_table_attach(AInfo^.TableWidget, AInfo^.ImageWidget,
0, 3, 0, 3, GTK_EXPAND or GTK_FILL, GTK_EXPAND or GTK_FILL, 0, 0);
end
else
case ALayout of
blGlyphLeft:
begin
if AInfo^.ImageWidget <> nil then
gtk_table_attach(AInfo^.TableWidget, AInfo^.ImageWidget,
1, 2, 1, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
gtk_table_attach(AInfo^.TableWidget, AInfo^.LabelWidget,
2, 3, 1, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
end;
blGlyphRight:
begin
gtk_table_attach(AInfo^.TableWidget, AInfo^.LabelWidget,
1, 2, 1, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
if AInfo^.ImageWidget <> nil then
gtk_table_attach(AInfo^.TableWidget, AInfo^.ImageWidget,
2, 3, 1, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
if AInfo^.SpaceWidget <> nil then
gtk_table_attach(AInfo^.TableWidget, AInfo^.SpaceWidget,
3, 4, 1, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
end;
blGlyphTop:
begin
if AInfo^.ImageWidget <> nil then
gtk_table_attach(AInfo^.TableWidget, AInfo^.ImageWidget,
1, 3, 1, 2, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
gtk_table_attach(AInfo^.TableWidget, AInfo^.LabelWidget,
1, 3, 2, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
end;
blGlyphBottom:
begin
gtk_table_attach(AInfo^.TableWidget, AInfo^.LabelWidget,
1, 3, 1, 2, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
if AInfo^.ImageWidget <> nil then
gtk_table_attach(AInfo^.TableWidget, AInfo^.ImageWidget,
1, 3, 2, 3, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
if AInfo^.SpaceWidget <> nil then
gtk_table_attach(AInfo^.TableWidget, AInfo^.SpaceWidget,
1, 3, 3, 4, GTK_SHRINK or GTK_FILL, GTK_SHRINK or GTK_FILL, 0, 0);
end;
end;
// remove temp reference
if AInfo^.SpaceWidget <> nil then
gtk_object_unref(AInfo^.SpaceWidget);
if AInfo^.ImageWidget <> nil then
gtk_object_unref(AInfo^.ImageWidget);
if AInfo^.LabelWidget <> nil then
gtk_object_unref(AInfo^.LabelWidget);
if AMargin >= 0 then
UpdateMargin(AInfo, ALayout, AMargin)
end;
class procedure TGtkWSBitBtn.UpdateMargin(const AInfo: PBitBtnWidgetInfo;
const ALayout: TButtonLayout; const AMargin: Integer);
begin
if AMargin < 0
then begin
if AInfo^.SpaceWidget <> nil
then begin
gtk_container_remove(AInfo^.TableWidget, AInfo^.SpaceWidget);
AInfo^.SpaceWidget := nil;
gtk_alignment_set(AInfo^.AlignWidget, 0.5, 0.5, 0, 0);
case ALayout of
blGlyphLeft: gtk_table_set_col_spacing(AInfo^.TableWidget, 0, 0);
blGlyphRight: gtk_table_set_col_spacing(AInfo^.TableWidget, 2, 0);
blGlyphTop: gtk_table_set_row_spacing(AInfo^.TableWidget, 0, 0);
blGlyphBottom: gtk_table_set_row_spacing(AInfo^.TableWidget, 2, 0);
end;
end;
end
else begin
if (AInfo^.SpaceWidget = nil)
and (ALayout in [blGlyphRight, blGlyphBottom])
then begin
{$IFDEF gtk1}
AInfo^.SpaceWidget := gtk_invisible_new;
{$ELSE}
// don't use gtk_invisible_new - it cannot have parent
AInfo^.SpaceWidget := gtk_image_new;
{$ENDIF}
UpdateLayout(AInfo, ALayout, AMargin);
end
else begin
case ALayout of
blGlyphLeft: begin
gtk_alignment_set(AInfo^.AlignWidget, 0, 0.5, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 0, AMargin);
gtk_table_set_col_spacing(AInfo^.TableWidget, 2, 0);
gtk_table_set_row_spacing(AInfo^.TableWidget, 0, 0);
gtk_table_set_row_spacing(AInfo^.TableWidget, 2, 0);
end;
blGlyphRight: begin
gtk_alignment_set(AInfo^.AlignWidget, 1, 0.5, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 2, AMargin);
gtk_table_set_row_spacing(AInfo^.TableWidget, 0, 0);
gtk_table_set_row_spacing(AInfo^.TableWidget, 2, 0);
end;
blGlyphTop: begin
gtk_alignment_set(AInfo^.AlignWidget, 0.5, 0, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 2, 0);
gtk_table_set_row_spacing(AInfo^.TableWidget, 0, AMargin);
gtk_table_set_row_spacing(AInfo^.TableWidget, 2, 0);
end;
blGlyphBottom: begin
gtk_alignment_set(AInfo^.AlignWidget, 0.5, 1, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 0, 0);
gtk_table_set_col_spacing(AInfo^.TableWidget, 2, 0);
gtk_table_set_row_spacing(AInfo^.TableWidget, 0, 0);
gtk_table_set_row_spacing(AInfo^.TableWidget, 2, AMargin);
end;
end;
end;
end;
end;
class procedure TGtkWSBitBtn.SetCallbacks(const AGtkWidget: PGtkWidget;
const AWidgetInfo: PWidgetInfo);
begin
TGtkWSButton.SetCallbacks(AGtkWidget, AWidgetInfo);
SignalConnect(AGtkWidget, 'state-changed', @GtkWSBitBtn_StateChanged, AWidgetInfo);
end;
end.
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