Rectangle in C#

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hi everyone,
i m trying to draw a rectangle in C# just like MS paint. I m able to draw it but the problem is, as i m doing it on mouse down and mouse up event so when i m darging mouse towards upper left side of form it is woking fine but if i m moving mouse in any other direction then nothing i been drawn i think it is realated to quadrants but do not how to achive it. any help is welcome

Posted 28-Dec-09 2:03am

Manish_nontu

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CPallini · Accepted Answer · 2009-12-28T02:26:00

Well, I assume you've two points, say {x0,y0} (start-of-dragging point) and {x1,y1} end-of dragging point}. let's suppose x0 != x1 and y0 != y1.
You should find the top-left point of the rectangle and the its size (both X and Y sizes):

int xtl, ytl; // top-left point
int xbr, ybr; // bottom-right point
int xcs, ycs; // size
if (x0 < x0)
{
  xtl = x0; xbr = x1;
}
else
{
  xtl = x1; xbr = x0;
}

if (y0 < y1)
{
  ytl = y0; ybr = y1;
}
else
{
  ytl = y1; ybr = y0;
}

xcs = xbr - xtl;
ycx = ybr - ytl;

Now you may properly create a rectangle, this way

Rectangle r(xtl, ytl, xcs, ycs);

:)