private static RECT PlaceOnScreen(RECT monitorRect, RECT windowRect)
{
int monitorWidth = monitorRect.Right - monitorRect.Left;
int monitorHeight = monitorRect.Bottom - monitorRect.Top;
if (windowRect.Right < monitorRect.Left)
{
// Off left side
int width = windowRect.Right - windowRect.Left;
if (width > monitorWidth)
{
width = monitorWidth;
}
windowRect.Left = monitorRect.Left;
windowRect.Right = windowRect.Left + width;
}
else if (windowRect.Left > monitorRect.Right)
{
// Off right side
int width = windowRect.Right - windowRect.Left;
if (width > monitorWidth)
{
width = monitorWidth;
}
windowRect.Right = monitorRect.Right;
windowRect.Left = windowRect.Right - width;
}
if (windowRect.Bottom < monitorRect.Top)
{
// Off top
int height = windowRect.Bottom - windowRect.Top;
if (height > monitorHeight)
{
height = monitorHeight;
}
windowRect.Top = monitorRect.Top;
windowRect.Bottom = windowRect.Top + height;
}
else if (windowRect.Top > monitorRect.Bottom)
{
// Off bottom
int height = windowRect.Bottom - windowRect.Top;
if (height > monitorHeight)
{
height = monitorHeight;
}
windowRect.Bottom = monitorRect.Bottom;
windowRect.Top = windowRect.Bottom - height;
}
return windowRect;
}
private static bool RectanglesIntersect(RECT a, RECT b)
{
if (a.Left > b.Right || a.Right < b.Left)
{
return false;
}
if (a.Top > b.Bottom || a.Bottom < b.Top)
{
return false;
}
return true;
}