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Joined: Jul 2004
Posts: 7
Nutrimatic drinks dispenser
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OP
Nutrimatic drinks dispenser
Joined: Jul 2004
Posts: 7 |
I wrote a function to change the cursor when a user hovers over a certain area of a custom window, however to stop flickering I also set the cursor class of this window to NULL. The problem i'm having now is mIRC is setting EVERY custom window's cursor class to NULL Here's my code:
int WINAPI SubWindow(HWND mWnd, HWND aWnd, char *data, char *parms, BOOL show, BOOL nopause)
{
hTicker = (HWND)atol(data);
if(IsWindow(hTicker))
{
SetClassLong(hTicker, GCL_HCURSOR, (LONG)NULL);
// More unrelated code here
}
return 3;
}
int WINAPI mCursor(HWND mWnd, HWND aWnd, char *data, char *parms, BOOL show, BOOL nopause)
{
HCURSOR hCurs;
if (!lstrcmp(data, "Hand"))
hCurs = LoadCursor(NULL, MAKEINTRESOURCE(32649));
else if (!lstrcmp(data, "Arrow"))
hCurs = LoadCursor(NULL, IDC_ARROW);
else {
lstrcpy(data, "E_INVALIDPARAMETERS");
return 3;
}
SetCursor(hCurs);
lstrcpy(data, "S_OK");
return 3;
}
Am I doing something wrong? The only thing I can think of is maybe i'm setting the global cursor class for custom windows to NULL instead of just for the one window. Please help 
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Joined: Oct 2003
Posts: 3,918
Hoopy frood
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Hoopy frood
Joined: Oct 2003
Posts: 3,918 |
Your assumption is right. You're modifying the Window CLASS (SetClassLong). Take a look at "SetWindowLong" instead, which operates on HWNDs, not their WNDCLASSEX structures.
- argv[0] on EFnet #mIRC
- "Life is a pointer to an integer without a cast"
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Joined: Jul 2004
Posts: 7
Nutrimatic drinks dispenser
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OP
Nutrimatic drinks dispenser
Joined: Jul 2004
Posts: 7 |
Oh I get it now, thanks for that. I did look in to SetWindowLong before SetClassLong but couldn't find anything about setting cursors though.
Unless you mean suclassing the window then using SetCursor when my window proc catches WM_MOUSEMOVE?
Thanks again
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Joined: Oct 2003
Posts: 3,918
Hoopy frood
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Hoopy frood
Joined: Oct 2003
Posts: 3,918 |
If it's not available for SetWindowLong then it may not be possible to set on a per-window basis, in which case you would probably need to subclass the window, yes.
- argv[0] on EFnet #mIRC
- "Life is a pointer to an integer without a cast"
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Joined: Jul 2004
Posts: 7
Nutrimatic drinks dispenser
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OP
Nutrimatic drinks dispenser
Joined: Jul 2004
Posts: 7 |
So i've been researching this for a few hours now to no avail, if anybody else is interested in this here is the solution I came up with:
HCURSOR hDefCursor;
case WM_MOUSEMOVE:
{
if (!bHover)
{
bHover = TRUE;
// Set class cursor to NULL when cursor is over the window
SetClassLong(hwnd, GCL_HCURSOR, (LONG)NULL);
lstrcpy(mData, "/.signal -n tick_mouse_enter");
SendMessage(hmIRC, WM_MCOMMAND, 0, 0);
SetTimer(hwnd, MOUSE_TIMER, 1, NULL);
}
// More Unrelated Code
}
break;
case WM_TIMER:
{
if ((int)wParam == MOUSE_TIMER)
{
GetCursorPos(&pt);
GetWindowRect(hwnd, &rM);
if(!PtInRect(&rM, pt))
{
bHover = FALSE;
// Set class cursor back to arrow when the cursor leaves the window
hDefCursor = LoadCursor(NULL, IDC_ARROW);
SetClassLong(hwnd, GCL_HCURSOR, (LONG)hDefCursor);
KillTimer(hwnd, MOUSE_TIMER);
lstrcpy(mData, "/.signal -n tick_mouse_leave");
SendMessage(hmIRC, WM_MCOMMAND, 0, 0);
}
}
}
break;
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Joined: Oct 2003
Posts: 3,918
Hoopy frood
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Hoopy frood
Joined: Oct 2003
Posts: 3,918 |
Did you try to subclass the window like I suggested?
- argv[0] on EFnet #mIRC
- "Life is a pointer to an integer without a cast"
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Joined: Jul 2004
Posts: 7
Nutrimatic drinks dispenser
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OP
Nutrimatic drinks dispenser
Joined: Jul 2004
Posts: 7 |
Yea I did, but I found out Windows restores the class cursor EVERY time there's a WM_MOUSEMOVE message. I think my method is the only way I can stop the flickering. Do you have any other ideas? Thanks N.B: http://blogs.msdn.com/oldnewthing/archive/2006/02/27/539880.aspx has some more on it, but nobody there had a great solution either
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Joined: Oct 2003
Posts: 3,918
Hoopy frood
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Hoopy frood
Joined: Oct 2003
Posts: 3,918 |
I'm not quite sure what the disadvantage of reassigning to another window class would be.. I don't think mIRC makes much use of the classes themselves.. I could be wrong.
- argv[0] on EFnet #mIRC
- "Life is a pointer to an integer without a cast"
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Joined: Jul 2004
Posts: 7
Nutrimatic drinks dispenser
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OP
Nutrimatic drinks dispenser
Joined: Jul 2004
Posts: 7 |
I wasn't sure you could reassign the window's class after it had been created? I've been doing a bit more research and found out about "superclassing" - seems to be exactly what I need so i'll give that a shot.
EDIT: Ok it seems superclassing is just for creating new windows from an edited class, annoying
Last edited by aschol; 20/03/10 12:03 PM.
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