GDI中是否有Delphi TextRect
的类似物?我查看了DrawText, DrawTextEx
,但没有找到所需的内容。我需要绘制一个进度条的百分比文本,该文本分为两个颜色部分,例如文本的左侧是黑色,右侧是白色。像往常一样,在所有进度栏中。
感谢您的回答!
最佳答案
您正在寻找ExtTextOut
函数。
样品:
procedure TForm4.FormPaint(Sender: TObject);
const
S = 'This is a sample text';
begin
ExtTextOut(Canvas.Handle, 10, 10, ETO_CLIPPED,
Rect(40, 10, 100, 100), PChar(S), length(S), nil)
end;
但是我认为您真正想做的是绘制'NOT-coloured text':
procedure DrawTextNOT(const hDC: HDC; const Font: TFont; const Text: string; const X, Y: integer);
begin
with TBitmap.Create do
try
Canvas.Font.Assign(Font);
with Canvas.TextExtent(Text) do
SetSize(cx, cy);
Canvas.Brush.Color := clBlack;
Canvas.FillRect(Rect(0, 0, Width, Height));
Canvas.Font.Color := clWhite;
Canvas.TextOut(0, 0, Text);
BitBlt(hDC, X, Y, Width, Height, Canvas.Handle, 0, 0, SRCINVERT);
finally
Free;
end;
end;
procedure TForm4.FormPaint(Sender: TObject);
const
S = 'This is a sample text';
var
ext: TSize;
begin
Canvas.Brush.Color := clBlack;
Canvas.FillRect(Rect(0, 0, Width div 2, Height));
Canvas.Brush.Color := clWhite;
Canvas.FillRect(Rect(Width div 2, 0, Width, Height));
ext := Canvas.TextExtent(S);
DrawTextNOT(Canvas.Handle, Canvas.Font, S, (Width - ext.cx) div 2,
(Height - ext.cy) div 2);
end;
(来源:rejbrand.se)