Zhiyi Zhang : comctl32/treeview: Don't repaint when handling WM_STYLECHANGED.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 44cfa3ec1af33f0f2560878c269405468f999a70
URL:    https://gitlab.winehq.org/wine/wine/-/commit/44cfa3ec1af33f0f2560878c2694054...

Author: Zhiyi Zhang 
Date:   Mon Oct 17 15:36:43 2022 +0800

comctl32/treeview: Don't repaint when handling WM_STYLECHANGED.

Some applications subclass treeview and change style multiple times when painting. Invalidating
control when handling WM_STYLECHANGED causes infinite WM_PAINT messages in this case and end up
stalling the message queue.

---

dlls/comctl32/tests/misc.c | 2 +-
 dlls/comctl32/treeview.c   | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/dlls/comctl32/tests/misc.c b/dlls/comctl32/tests/misc.c
index 5da44e7af8c..73526020843 100644
--- a/dlls/comctl32/tests/misc.c
+++ b/dlls/comctl32/tests/misc.c
@@ -1109,7 +1109,7 @@ static void test_WM_STYLECHANGED(void)
         {TOOLBARCLASSNAMEA, wm_stylechanged_seq},
         {TOOLTIPS_CLASSA, wm_stylechanged_seq},
         {TRACKBAR_CLASSA, wm_stylechanged_trackbar_seq, TRUE},
-        {WC_TREEVIEWA, wm_stylechanged_seq, TRUE},
+        {WC_TREEVIEWA, wm_stylechanged_seq},
         {UPDOWN_CLASSA, wm_stylechanged_seq, TRUE},
         {WC_SCROLLBARA, wm_stylechanged_seq},
     };
diff --git a/dlls/comctl32/treeview.c b/dlls/comctl32/treeview.c
index 23e87bdce04..d3a69bb438e 100644
--- a/dlls/comctl32/treeview.c
+++ b/dlls/comctl32/treeview.c
@@ -5627,7 +5627,6 @@ TREEVIEW_StyleChanged(TREEVIEW_INFO *infoPtr, WPARAM wParam, LPARAM lParam)
     TREEVIEW_EndEditLabelNow(infoPtr, TRUE);
     TREEVIEW_UpdateSubTree(infoPtr, infoPtr->root);
     TREEVIEW_UpdateScrollBars(infoPtr);
-    TREEVIEW_Invalidate(infoPtr, NULL);

return 0;
 }