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| unit PicButton;
interface
uses
Windows, Messages, Classes, Graphics, Controls, stdCtrls, Dialogs, SysUtils;
type
TPicButton = class(TButton)
private
FOver, FDoRect, FDoText: Boolean;
FFocusColor: TColor;
FNormalPic, FHiLightPic, FDownPic, FDisabledPic, FFocusPic: TBitmap;
procedure setNormal(Value: TBitMap);
procedure setHiLight(Value: TBitMap);
procedure setDown(Value: TBitMap);
procedure setDisabled(Value: TBitmap);
procedure setFocusPic(Value: TBitMap);
procedure DrawItem(const DIRec: TDrawItemStruct);
procedure CNMeasureItem(var Message: TWMMeasureItem); message CN_MEASUREITEM;
procedure CNDrawItem(var Message: TWMDrawItem); message CN_DRAWITEM;
procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
procedure CMTextChanged(var Message: TMessage); message CM_TEXTCHANGED;
procedure CMEnabledChanged(var Message: TMessage); message CM_ENABLEDCHANGED;
protected
property Brush;
property Default;
property Action;
procedure SetButtonStyle(ADefault: Boolean); overRide;
procedure WMPaint(var Message: TMessage); message WM_PAINT;
procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
procedure CMMouseEnter(var Message: TMessage); message CM_MOUSEENTER;
public
{ Public declarations }
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Loaded; override;
published
{ Published declarations }
property PicNormal: TBitMap read FNormalPic write setNormal;
property PicHiLight: TBitMap read FHiLightPic write setHiLight;
property PicPushed: TBitMap read FDownPic write setDown;
property PicDisabled: TBitmap read FDisabledPic write setDisabled;
property PicFocus: TBitmap read FFocusPic write setFocusPic;
property FocusColor: TColor read FFocusColor write FFocusColor default clRed;
property DoFocusText: Boolean read FDoText write FDoText default False;
property DoFocusRect: Boolean read FDoRect write FDoRect default False;
property Caption;
property Enabled;
property ParentShowHint;
property ParentBiDiMode;
property ShowHint;
property TabOrder;
property TabStop;
property Visible;
property OnEnter;
property OnExit;
end;
procedure Register;
implementation
type
TMyState = (bsUp, bsDown, bsHigh, bsDisabled);
procedure Register;
begin
RegisterComponents('DelphiFr', [TPicButton]);
end;
constructor TPicButton.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
ControlStyle:= ControlStyle - [csSetCaption, csOpaque];
FOver := False;
FNormalPic := TBitMap.Create;
FHiLightPic := TBitmap.Create;
FDownPic := TBitmap.Create;
FDisabledPic := TBitmap.Create;
FFocusPic := TBitmap.Create;
FDoText := False;
FDoRect := False;
FFocusColor := clRed;
Constraints.MaxHeight := Height;
Constraints.MinHeight := 0; // Height;
Constraints.MaxWidth := Width;
Constraints.MinWidth := Width; // Klaus Constraints.MinHeight corrected by Constraints.MinWidth
end;
destructor TPicButton.Destroy;
begin
inherited Destroy;
FNormalPic.Free;
FHiLightPic.Free;
FDownPic.Free;
FDisabledPic.Free;
FFocusPic.Free;
end;
procedure TPicButton.Loaded;
begin
inherited Loaded;
if FNormalPic.Empty then Exit;
Constraints.MaxHeight := FNormalPic.Height;
Constraints.MinHeight := 0; // FNormalPic.Height;
Constraints.MaxWidth := FNormalPic.Width;
Constraints.MinWidth := FNormalPic.Width; // Klaus Constraints.MinHeight corrected by Constraints.MinWidth
Width := FNormalPic.Width;
Height := FNormalPic.Height;
end;
procedure TPicButton.SetButtonStyle(ADefault: Boolean);
begin
if HandleAllocated then
SendMessage(Handle, BM_SETSTYLE, BS_PUSHBUTTON or BS_OWNERDRAW, 1);
end;
procedure TPicButton.setNormal(Value: TBitMap);
begin
FNormalPic.Assign(Value);
if not FNormalPic.Empty then
begin
Constraints.MaxHeight := FNormalPic.Height;
Constraints.MinHeight := 0; // FNormalPic.Height;
Constraints.MaxWidth := FNormalPic.Width;
Constraints.MinWidth := FNormalPic.Width; // Klaus Constraints.MinHeigt corrected by Constraints.MinWidth
Height := FNormalPic.Height;
Width := FNormalPic.Width;
end;
Invalidate;
end;
procedure TPicButton.setHiLight(Value: TBitMap);
begin
FHiLightPic.Assign(Value);
end;
procedure TPicButton.setDown(Value: TBitMap);
begin
FDownPic.Assign(Value);
end;
procedure TPicButton.setDisabled(Value: TBitMap);
begin
FDisabledPic.Assign(Value);
end;
procedure TPicButton.setFocusPic(Value: TBitMap);
begin
FFocusPic.Assign(Value);
end;
procedure TPicButton.CNMeasureItem(var Message: TWMMeasureItem);
begin
Message.MeasureItemStruct^.itemWidth := Width;
Message.MeasureItemStruct^.itemHeight := Height;
end;
procedure TPicButton.CNDrawItem(var Message: TWMDrawItem);
begin
DrawItem(Message.DrawItemStruct^);
end;
procedure TPicButton.CMTextChanged(var Message: TMessage);
begin
Invalidate;
end;
procedure TPicButton.CMMouseLeave(var Message: TMessage);
begin
FOver := False;
if Enabled and Assigned(FHiLightPic) then
Invalidate;
end;
procedure TPicButton.CMMouseEnter(var Message: TMessage);
begin
FOver := True;
if Enabled and Assigned(FHiLightPic) then
Invalidate;
end;
procedure TPicButton.CMFontChanged(var Message: TMessage);
begin
inherited;
Invalidate;
end;
procedure TPicButton.CMEnabledChanged(var Message: TMessage);
begin
inherited;
Invalidate;
end;
procedure TPicButton.WMPaint(var Message: TMessage);
var
BmpDC: Integer;
PaintS: TPaintStruct;
cRect: TRect;
PenO: Cardinal;
begin
if not (csDesigning in ComponentState) then
begin
Inherited;
Exit;
end;
Message.Result := 0;
BeginPaint(Handle, PaintS);
if FNormalPic.Empty then
begin
PenO := SelectObject(PaintS.hDC, CreatePen(PS_SOLID, 1, $999999));
SetROP2(PaintS.hdc, R2_XORPEN);
Rectangle(PaintS.hdc, 0, 0, Width, Height);
DeleteObject(SelectObject(PaintS.hdc, PenO));
EndPaint(Handle,PaintS);
Exit; // deactivated by Klaus
end;
BmpDC := CreateCompatibleDC(0);
SelectObject(BmpDC, FNormalPic.Handle);
BitBlt(PaintS.hdc, PaintS.rcPaint.Left, PaintS.rcPaint.Top,
PaintS.rcPaint.Right, PaintS.rcPaint.Bottom, BmpDC,
PaintS.rcPaint.Left, PaintS.rcPaint.Top, SRCCOPY);
DeleteDC(BmpDC);
if Length(Caption) > 0 then
begin
cRect := ClientRect;
SelectObject(PaintS.hdc, Font.Handle);
SetBkMode(PaintS.hdc, TRANSPARENT);
DrawText(PaintS.hdc,PChar(Caption),-1,cRect,DT_SINGLELINE or DT_VCENTER or DT_CENTER);
end;
EndPaint(Handle,PaintS);
end;
procedure TPicButton.DrawItem(const DIRec: TDrawItemStruct);
var
Pic: TBitmap;
IsFocus: Boolean;
State: TMyState;
cRect: TRect;
begin
if (csDesigning in ComponentState) then Exit;
cRect := ClientRect;
{I assign a State to get the correct Image}
if not Enabled then State := bsDisabled else
if DIRec.itemState and ODS_SELECTED <> 0 then
State := bsDown else
if FOver then
State := bsHigh else
State := bsUp;
IsFocus := DIRec.itemState and ODS_FOCUS <> 0;
Pic := FNormalPic; // added by Klaus
SetTextColor(DIRec.hdc, Font.Color); // added by Klaus
case State of
{set the Pic and cRect}
bsUp: if IsFocus then
if not FFocusPic.Empty then Pic := FFocusPic;
bsDown: begin
if not FDownPic.Empty then
Pic := FDownPic else
if not FHiLightPic.Empty then Pic := FHiLightPic;
cRect := Rect(2,2,Width+2,Height+2)
end;
bsHigh: if not FHiLightPic.Empty then Pic := FHiLightPic;
bsDisabled: begin
if not FDisabledPic.Empty then Pic := FDisabledPic;
SetTextColor(DIRec.hdc, clSilver);
end;
end;
if not Pic.Empty then
BitBlt(DIRec.hDC, 0, 0, Width, Height, Pic.Canvas.Handle, 0, 0, SRCCOPY);
if IsFocus and FDoText then
SetTextColor(DIRec.hdc, FFocusColor);
SelectObject(DIRec.hDC, Font.Handle);
SetBkMode(DiRec.hdc, TRANSPARENT);
if Length(Caption) > 0 then
DrawText(DIRec.hDC,PChar(Caption),-1,cRect,DT_SINGLELINE or DT_VCENTER or DT_CENTER);
if IsFocus and FDoRect then
begin
InflateRect(cRect, -3, -3);
windows.DrawFocusRect(DIRec.hdc, cRect);
end;
end;
end. |
