Delphi TextRect
GDI中有类似物吗?我看了看DrawText, DrawTextEx
,但没有找到我需要的东西。我需要绘制一个进度条的百分比文本,它分为两个颜色部分,例如文本的左侧部分是黑色,右侧是白色。所以通常在所有进度条中。
感谢您的回答!
您正在寻找该ExtTextOut
功能。
样本:
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;
但我认为您真正想做的是绘制“非彩色文本”:
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)