Drawing strings on GDI+ that are vertical bottom to top aligned!

Williams

Hi, How can I draw strings with GDI+ that are are vertical bottom to top aligned! I try things as SetFormat(StringFormatFlagsDirectionVertical | StringFormatFlagsDirectionRightToLeft) but the text is always top to bottom oriented.

Jonathan de Halleux

Yep, that's a serious limitation of GDI+ but it can be easily overpassed by rotating yourself the text:

// defined somewhere
Graphics* m_pGraphics;

What you have to do is : 1. translate text to origin, 2. rotate, 3. translate back to position, Let's go: We create a graphic container to apply transformations

graphicsContainer = m_pGraphics->BeginContainer();

Doing steps 1,2,3 the order of matrix multiplication is important !

m\_pGraphics->TranslateTransform(pointF.X,pointF.Y);
// angle is the angle you want to rotate your text in CCW turn with 0 = horizontal. Of course, in GDI+, Microsoft uses
// CW angle so it is not compatible with trigonometric functions :(
m\_pGraphics->RotateTransform(-angle);
m\_pGraphics->TranslateTransform(-pointF.X,-pointF.Y);

Draw the string

m\_pGraphics->DrawString(str, -1, &font, pointF, &sf,&solidBrush);

Fold back transformations by getting out of the container

m_pGraphics->EndContainer(graphicsContainer);

Jonathan de Halleux, Belgium.

Williams

Very thanks friend. It´s really what I was thinking to do. Thanks for your help!:)