Flicker Free Drawing in C#

AB7771

Hi all can anyone tell me how to draw a line without flickering the screen Thanks Pramod

Marc 0

In your constructor (of the control that is drawn upon):

base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint);

Did this from the top of my head, so maybe the enums are not spelled correctly, but it should point you in the right direction. Also make sure you do the painting in OnPaint, not GreateGraphics. HTH! :)

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.." -- Mark McCormick

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AB7771

Hi Marc, Thanks for the suggestion but i am using a RichtextBox and it does not has a setStyle method any other suggestions will be appreciated Waiting for your quick reply. Thanks Pramod

J4amieC

RichTextBox does have a SetStyle method (it is inherited from Control), but it is protected so only accessible from a derived class. As was suggested above, to get the functionality you require you must inherit from RichTextBox, set the relevant style flags in your constructor and do your painting in the overriden OnPaint method. Im pretty sure you are using Graphics g = Graphics.CreateGraphics(yourRTBInstance) to draw, which in this case is the wrong way. -- modified at 8:29 Wednesday 11th January, 2006

Marc 0

Oh yeah it's protected, i had forgotten that :doh:

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.." -- Mark McCormick

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AB7771

Hi, can anyone of you send me the code please Thanks PRamod

AB7771

Hi, CAn u send me the code Thanks Pramod

AB7771

Hi Marc, i got it and now the drawing is done fine but still some flickering is there. This has also caused one more problem\, Due to this code now if i type something in the Richtextbox it does not shows the text instead white spaces are shown any suggestions to avoid this Thanks

Marc 0

I have no experience with RichTextBoxes, only owner-drawn controls, so i dont think i can help you that much. You can try fiddling with the SetStyle flags.

base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true);

base.Setstyle(ControlStyles.DoubleBuffer, true);
or
base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
or
base.Setstyle(ControlStyles.DoubleBuffer | ControlStyles.UserPaint, true);

Sorry i can't help you any further...

"..Commit yourself to quality from day one..it's better to do nothing at all than to do something badly.." -- Mark McCormick

|| Fold With Us! || Pensieve || VG.Net ||

AB7771

i tried all the options but none of them are working for me Anyways Thanks for the suggestions :) Pramod

SwitcherSoft

Did you try this?

public class MyRichText : RichTextBox
{
public MyRichText()
{
//by setting Double Buffer, the painting will finish before its redenered
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
SetStyle(ControlStyles.ResizeRedraw, true);
SetStyle(ControlStyles.Selectable, true);

}
}

Jordan