Subj : Re: Need help with cursor managment
To   : borland.public.cpp.borlandcpp
From : Bob Gonder
Date : Wed Jun 23 2004 03:56 pm

Jeff Baker wrote:

>Yeah I played with that but I just couldn't get it to work correctly (I'm
>sure it's just me). I don't know how to use it correctly and I have no
>documentation showing an example. I'd be more then happy if someone could
>show me an example of it's use with this code.

Just guessing at this...

case WM_SETCURSOR:
	if( hwndOfControlImInteresedIn == (HWND) wParam )
	{
		if( 0 == LOWORD(lParam) )  // hit-test code 
		{   SetCursor(arrow);
		}else{
		    SetCursor(cross);
		};

>One more question, is there a way to use PtInRect so that it only returns
>true if the point is inside the rect? The PtInRect returns true if the point
>is to the left or above the rect as well as inside of it.
>
>case WM_PAINT:
>   {
>   GetClientRect(hwnd,&ta);
>   ta.left += 100;
>   ta.top += 100;
>   ta.right -= 100;
>   ta.bottom -= 100;

What if  ta.left > ta.right or top>bottom?
Better check that. That's probably why you are getting a hit "outside"
the rect.


>  case WM_MOUSEMOVE:
>   {
>   GetCursorPos(&loc);
/* loc = screen coords */
>   MapWindowPoints(HWND_DESKTOP,hwnd,&loc,2);
loc is a POINT, not a RECT.  Last param should be 1.
Note: That might affect ta if it is after loc in memory.

ScreenToClient(hwnd,&loc)  might be simpler.

Might want to do the GetClientRect in here.
Or, use GetWindowRect(hwnd,&ta) to have it in screen coords.

>   if (PtInRect(&ta,loc)) SetCursor(cross);
>   else SetCursor(arrow);
>   ShowCursor(TRUE);
>   } break;

So:
   GetCursorPos(&loc);/* loc = screen coords */
   ScreenToClient(hwnd,&loc);/*local coords*/
   GetClientRect(hwnd,&ta);/*local coords*/
Or:
   GetCursorPos(&loc);/* loc = screen coords */
   GetWindowRect(hwnd,&ta);/*screen coords*/
Then:
   ta.left += 100;
   ta.top += 100;
   ta.right = ta.left+50;/*or whatever*/
   ta.bottom = ta.top+20;/*or whatever*/
   if (PtInRect(&ta,loc))
	 SetCursor(cross);

.