m.Borderstyle in [bsSizeToolWin, bsSizeable] then
begin
Dec(Left, 2); Inc(Top, 2);
end
else begin
Dec(Left); Inc(Top);
end;
if (FForm.Borderstyle in [bsSizeToolWin,bsToolWindow]) then
begin
BtnWidth := GetSystemMetrics(SM_CXSMSIZE) - 2;
BtnHeight := GetSystemMetrics(SM_CYSMSIZE) - 4;
end
else begin
BtnWidth := GetSystemMetrics(SM_CXSIZE) - 2;
BtnHeight := GetSystemMetrics(SM_CYSIZE) - 4;
end;
Right := Left + BtnWidth;
Bottom := Top + BtnHeight;
end;
end;
procedure TTitleBarButton.Paint;
var
GlyphRect: TRect;
begin
if not FVisible then Exit;
with TCanvas.Create do
begin
try
Handle := GetWindowDC(FForm.Handle); //得到窗体DC，包括标题栏、菜单、滚动条等
Brush.Color := FColor; //画Button凸起和按下时的外观
if FButtonDown then
Pen.Color := clBtnHighlight
else
Pen.Color := cl3DDkShadow;
Rectangle(BoundsRect);
with BoundsRect do
begin
if FButtonDown then
Pen.Color := cl3DDkShadow
else
Pen.Color := clBtnHighLight;
MoveTo(Left,Bottom-2);
LineTo(Left,Top);
LineTo(Right-1,Top);
Pen.Color := clGray;
if FButtonDown then
begin
MoveTo(Left+1,Bottom-3);
LineTo(Left+1,Top+1);
LineTo(Right-2,Top+1);
end
else begin
MoveTo(Left+1,Bottom-2);
LineTo(Right-2,Bottom-2);
LineTo(Right-2,Top);
end;
end;
if Assigned(Glyph) then //如果关联了图片，则画图片
begin
GlyphRect := BoundsRect;
GlyphRect.Right := GlyphRect.Right - 7;
GlyphRect.Bottom := GlyphRect.Bottom - 5;
if FButtonDown then
OffsetRect(GlyphRect,4,3)
else
OffsetRect(GlyphRect,3,2);
with GlyphRect do
StretchBlt(Handle, Left, Top, Right-Left, Bottom-Top,
FGlyph.Canvas.Handle, 0, 0, FGlyph.Width, FGlyph.Height, srcCopy);
end;
finally
ReleaseDC(FForm.Handle,Handle);
Free;
end;
end;
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