GDI Interface

[cshivaprasad]

I am drawing a binary tree on form. but when i resize form window to small and resize it back, the portion of drawing which is in resize area, is got erased. how can i get that drawing back.. Pls help me out

[alexey N]

Repaint form on Resize event. Best regards, A_l_e_x_e_y_.

[cshivaprasad]

There is no repaint method for form object. How can i repaint

[alexey N]

Call Invalidate() method. And if you painting in form event Paint - your code repaint your tree. If you got flickering set form DoubleBuffered property to true. Why don't you use UserControl, instead of painting on form ? Best regards, Alexey.

[microsoc]

Hi cshivaprasad! :) If you're inherting from a form, add these lines of code to your constructor.

SetStyle(ControlStyles.ResizeRedraw, true);

this will automatically repaint your form when it's resize.

SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);

this will prevent the flickering of your form. hope these help! :) microsoc :cool: