Nikolay Sivov : comctl32/trackbar: Fix TBM_SETRANGEMAX handling when new limit is less than current min boundary.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bb1d68ede06c8b517ea16246e376a4a4e52bf1c5
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=bb1d68ede06c8b517ea16246e376a4a4e52bf1c5

Author: Nikolay Sivov <nsivov at codeweavers.com>
Date:   Thu Jan 12 17:22:25 2017 +0300

comctl32/trackbar: Fix TBM_SETRANGEMAX handling when new limit is less than current min boundary.

Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/comctl32/tests/trackbar.c | 26 ++++++++++++++++++++++++++
 dlls/comctl32/trackbar.c       |  5 +++--
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/dlls/comctl32/tests/trackbar.c b/dlls/comctl32/tests/trackbar.c
index b236cc3..a0fae00 100644
--- a/dlls/comctl32/tests/trackbar.c
+++ b/dlls/comctl32/tests/trackbar.c
@@ -775,6 +775,32 @@ static void test_range(void)
     SendMessageA(hWndTrackbar, TBM_GETTHUMBRECT, 0, (LPARAM)&rect1);
     ok(EqualRect(&rect1, &rect2), "thumb rectangle not updated\n");
 
+    /* test position update on range change */
+
+    /* set to [20, 50], position at 30, reduce range to [20,25] */
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMIN, FALSE, 20);
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMAX, FALSE, 50);
+    SendMessageA(hWndTrackbar, TBM_SETPOS, FALSE, 30);
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMAX, FALSE, 25);
+    r = SendMessageA(hWndTrackbar, TBM_GETPOS, 0, 0);
+    ok(r == 25, "Unexpected position %d\n", r);
+
+    /* set to [20, 50], position at 30, flip max to 10 */
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMIN, FALSE, 20);
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMAX, FALSE, 50);
+    SendMessageA(hWndTrackbar, TBM_SETPOS, FALSE, 30);
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMAX, FALSE, 10);
+    r = SendMessageA(hWndTrackbar, TBM_GETPOS, 0, 0);
+    ok(r == 20, "Unexpected position %d\n", r);
+
+    /* set to [20, 50], position at 30, flip min to 70 */
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMIN, FALSE, 20);
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMAX, FALSE, 50);
+    SendMessageA(hWndTrackbar, TBM_SETPOS, FALSE, 30);
+    SendMessageA(hWndTrackbar, TBM_SETRANGEMIN, FALSE, 70);
+    r = SendMessageA(hWndTrackbar, TBM_GETPOS, 0, 0);
+    ok(r == 70, "Unexpected position %d\n", r);
+
     DestroyWindow(hWndTrackbar);
 }
 
diff --git a/dlls/comctl32/trackbar.c b/dlls/comctl32/trackbar.c
index c6757a5..cdbf859 100644
--- a/dlls/comctl32/trackbar.c
+++ b/dlls/comctl32/trackbar.c
@@ -1275,10 +1275,11 @@ static inline LRESULT
 TRACKBAR_SetRangeMax (TRACKBAR_INFO *infoPtr, BOOL redraw, LONG lMax)
 {
     BOOL changed = infoPtr->lRangeMax != lMax;
+    LONG rightmost = max(lMax, infoPtr->lRangeMin);
 
     infoPtr->lRangeMax = lMax;
-    if (infoPtr->lPos > infoPtr->lRangeMax) {
-        infoPtr->lPos = infoPtr->lRangeMax;
+    if (infoPtr->lPos > rightmost) {
+        infoPtr->lPos = rightmost;
         infoPtr->flags |= TB_THUMBPOSCHANGED;
     }