DrawClippedGrid painting issues

[Mike]

I recreated the painting problem with DrawClippedGrid even in 2.9.0.1. I''m using PerformanceGrid from 2.9.0.1 performance sample. I simply copied DrawClippedGrid from 3.3 and added the method to my grid.

GridNoBorderOverpaint.zip

[Administrator]

Mike, I noticed that there is a drawing issue when HScrollPixel = true is set and you horizontally scrolled. Is that the case in your example? The TraderGridTest has by default HScrollPixel = false. That''s why I didn''t notice it there. I am a bit at loss what version 2.9.0.1 is. Do you have some special private patch? Stefan >I recreated the painting problem with DrawClippedGrid even in 2.9.0.1. > >I''m using PerformanceGrid from 2.9.0.1 performance sample. I simply copied DrawClippedGrid from 3.3 and added the method to my grid.

GridNoBorderOverpaint.zip

[Administrator]

>>I simply copied DrawClippedGrid

When I tried to move the DrawClippedGrid method exposed in the 3.3 GriControlbase into the performance sample of 2.1.0.9, I could not get it to work. The DrawClippedGrid accesses private members of GridControlBase.

Can you upload a sample that I can run with 2.1.0.9 and see the problem?

[Mike]

Attached is the 3.3 TraderGrid screen shot. I meant 2.1.0.9, sorry. I copied and changed code from 3.3. I added the following method to my GridControl in 2.1.0.9 codebase: public void DrawClippedGrid( Graphics g, bool shouldClip, Rectangle rectClip ) { // Get rectangle to be drawn. if (rectClip.IsEmpty) rectClip = this.GridBounds; else if (!rectClip.IntersectsWith(this.GridBounds)) return; // ... nothing needs drawn rectClip = Rectangle.Intersect(this.GridBounds, rectClip); if (shouldClip) g.SetClip(rectClip); // Compute rows and colums. int topRow, leftCol, bottomRow, rightCol; this.ViewLayout.RectangleToClientRowCol(rectClip, out topRow, out leftCol, out bottomRow, out rightCol, GridCellSizeKind.ActualSize); topRow = Math.Max(0, topRow); leftCol = Math.Max(0, leftCol); this.OnDrawClientRowCol(topRow, leftCol, bottomRow, rightCol, g, rectClip); } >>>I simply copied DrawClippedGrid > >When I tried to move the DrawClippedGrid method exposed in the 3.3 GriControlbase into the performance sample of 2.1.0.9, I could not get it to work. The DrawClippedGrid accesses private members of GridControlBase. > >Can you upload a sample that I can run with 2.1.0.9 and see the problem?

TraderGridIssue.zip

[Administrator]

I can see the problem of the numbers overwriting in the 3.3 sample when you resize the form to enlarge the grid. The drawing is still being clipped to the original size. I think you can avoid this problem in the 3.3 sample by handling the Form.SizeChanged event and recreating the cached graphics object at that point.

private void Form1_SizeChanged(object sender, EventArgs e)
{
	if (drawDirectToDC )
	{
		if(g != null)
		{
			g.Dispose();
			g = m_syncGrid.CreateGridGraphics();
		}
	}
}