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Resize a Rectangle at runtime

ugp

I need to resize a Rectangle at runtime. I draw the Retangle on the Form1_Paint(), but unable to resize itt.. Graphics graph = this.CreateGraphics(); Pen penCurrent = new Pen(Color.Red); Rect = new Rectangle(300, 50, 150, 75); graph.DrawRectangle(penCurrent, Rect); need some help!

1 Reply

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Mike Gold19y ago
First of all, you don't want to call CreateGraphics, you should do everything in the Paint event handler. To resize a rectangle, just change the boundaries of the rectangle outside the Paint event.

for example:

OnPaint()
{
   e.Graphics.DrawRectangle(30, 30, x, y);
}

Set x and y outside of the event handler and call invalidate on the form region

OnButtonPressed (object sender, EventArg e)
{
   x = x+5;
   y = y + 5;
   Invalidate(29, 29, x+1, y+1); // force it to redraw
}