[PATCH v3 1/2] comctl32: Implement MSAA events for buttons.

[Esme Povirk]

From: Esme Povirk

---
 dlls/comctl32/button.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/dlls/comctl32/button.c b/dlls/comctl32/button.c
index 77eb54fbcf1..9e7eaedc383 100644
--- a/dlls/comctl32/button.c
+++ b/dlls/comctl32/button.c
@@ -57,6 +57,7 @@
 #include "wine/debug.h"

#include "comctl32.h"
+#include "uiautomationclient.h"

WINE_DEFAULT_DEBUG_CHANNEL(button);

@@ -895,6 +896,8 @@ static LRESULT CALLBACK BUTTON_WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, L
         style = (style & ~BS_TYPEMASK) | new_btn_type;
         SetWindowLongW( hWnd, GWL_STYLE, style );

+        NotifyWinEvent( EVENT_OBJECT_STATECHANGE, hWnd, OBJID_CLIENT, 0 );
+
         /* Only redraw if lParam flag is set.*/
         if (lParam)
             InvalidateRect( hWnd, NULL, TRUE );
@@ -995,6 +998,8 @@ static LRESULT CALLBACK BUTTON_WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, L
         {
             infoPtr->state = (infoPtr->state & ~3) | wParam;
             InvalidateRect( hWnd, NULL, FALSE );
+            NotifyWinEvent( UIA_ToggleToggleStatePropertyId, hWnd, OBJID_CLIENT, 0 );
+            NotifyWinEvent( EVENT_OBJECT_STATECHANGE, hWnd, OBJID_CLIENT, 0 );
         }
         if ((btn_type == BS_AUTORADIOBUTTON) && (wParam == BST_CHECKED) && (style & WS_CHILD))
             BUTTON_CheckAutoRadioButton( hWnd );
@@ -1018,6 +1023,8 @@ static LRESULT CALLBACK BUTTON_WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, L
                 BUTTON_NOTIFY_PARENT( hWnd, (state & BST_PUSHED) ? BN_HILITE : BN_UNHILITE );
             infoPtr->state = state;

+            NotifyWinEvent( EVENT_OBJECT_STATECHANGE, hWnd, OBJID_CLIENT, 0 );
+
             InvalidateRect( hWnd, NULL, FALSE );
         }
         break;
@@ -1029,6 +1036,13 @@ static LRESULT CALLBACK BUTTON_WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, L
         {
             infoPtr->state &= ~BST_DROPDOWNPUSHED;
             infoPtr->state |= new_state;
+            NotifyWinEvent( EVENT_OBJECT_STATECHANGE, hWnd, OBJID_CLIENT, 0 );
+            NotifyWinEvent( UIA_ExpandCollapseExpandCollapseStatePropertyId, hWnd, OBJID_CLIENT, 0 );
+
+            /* Windows sends this twice for some reason */
+            NotifyWinEvent( EVENT_OBJECT_STATECHANGE, hWnd, OBJID_CLIENT, 0 );
+            NotifyWinEvent( UIA_ExpandCollapseExpandCollapseStatePropertyId, hWnd, OBJID_CLIENT, 0 );
+
             InvalidateRect(hWnd, NULL, FALSE);
         }
         break;