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Fix subclassing to support nested messages.

This commit is contained in:
Robert Shearman 2004-03-11 22:38:22 +00:00 committed by Alexandre Julliard
parent adc7a91152
commit cf4c3348bb
1 changed files with 31 additions and 3 deletions
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34
dlls/comctl32/commctrl.c
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@ -114,6 +114,7 @@ extern void TREEVIEW_Unregister(void);
extern void UPDOWN_Register(void);
extern void UPDOWN_Unregister(void);
static LRESULT WINAPI SubclassWndProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LPSTR COMCTL32_aSubclass = NULL;
HMODULE COMCTL32_hModule = 0;
@ -1108,10 +1109,10 @@ BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
/* set window procedure to our own and save the current one */
if (IsWindowUnicode (hWnd))
stack->origproc = (WNDPROC)SetWindowLongW (hWnd, GWL_WNDPROC,
(LONG)DefSubclassProc);
(LONG)SubclassWndProc);
else
stack->origproc = (WNDPROC)SetWindowLongA (hWnd, GWL_WNDPROC,
(LONG)DefSubclassProc);
(LONG)SubclassWndProc);
} else {
WNDPROC current;
if (IsWindowUnicode (hWnd))
@ -1119,7 +1120,7 @@ BOOL WINAPI SetWindowSubclass (HWND hWnd, SUBCLASSPROC pfnSubclass,
else
current = (WNDPROC)GetWindowLongA (hWnd, GWL_WNDPROC);
if (current != DefSubclassProc) {
if (current != SubclassWndProc) {
ERR ("Application has subclassed with our procedure, then manually, then with us again. The current implementation can't handle this.\n");
return FALSE;
}
@ -1262,6 +1263,33 @@ BOOL WINAPI RemoveWindowSubclass(HWND hWnd, SUBCLASSPROC pfnSubclass, UINT_PTR u
}
/***********************************************************************
* SubclassWndProc (internal)
*
* Window procedure for all subclassed windows.
* Saves the current subclassing stack position to support nested messages
*/
static LRESULT WINAPI SubclassWndProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
LPSUBCLASS_INFO stack;
int stackpos;
LRESULT ret;
/* retrieve our little stack from the Properties */
stack = (LPSUBCLASS_INFO)GetPropA (hWnd, COMCTL32_aSubclass);
if (!stack) {
ERR ("Our sub classing stack got erased for %p!! Nothing we can do\n", hWnd);
return 0;
}
stackpos = stack->stackpos;
stack->stackpos = stack->stacknum;
ret = DefSubclassProc(hWnd,uMsg,wParam,lParam);
stack->stackpos = stackpos;
return ret;
}
/***********************************************************************
* DefSubclassProc [COMCTL32.413]
*