[jimtabor] 69625: [User32] - Patch by Joachim Priesner : Hide horizontal Listbox scroll bar if no horizontal extent is set. See CORE-1101. - Patch by Alex Henrie : Simplify if-else statement. Scrol...

Author: jimtabor
Date: Tue Oct 20 01:54:18 2015
New Revision: 69625

URL: http://svn.reactos.org/svn/reactos?rev=69625&view=rev
Log:
[User32]
- Patch by Joachim Priesner : Hide horizontal Listbox scroll bar if no horizontal extent
is set. See CORE-1101.
- Patch by Alex Henrie : Simplify if-else statement. Scroll listbox item completely into
view on LB_SETCURSEL.

Modified:
    trunk/reactos/win32ss/user/user32/controls/listbox.c

Modified: trunk/reactos/win32ss/user/user32/controls/listbox.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/user32/contro…
==============================================================================
--- trunk/reactos/win32ss/user/user32/controls/listbox.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/user32/controls/listbox.c	[iso-8859-1] Tue Oct 20 01:54:18
2015
@@ -259,7 +259,7 @@
         if (descr->style & WS_VSCROLL)
             SetScrollInfo( descr->self, SB_VERT, &info, TRUE );
 
-        if (descr->style & WS_HSCROLL)
+        if (descr->style & WS_HSCROLL && descr->horz_extent)
         {
             info.nPos  = descr->horz_pos;
             info.nPage = descr->width;
@@ -267,6 +267,20 @@
             if (descr->style & LBS_DISABLENOSCROLL)
                 info.fMask |= SIF_DISABLENOSCROLL;
             SetScrollInfo( descr->self, SB_HORZ, &info, TRUE );
+        }
+        else
+        {
+            if (descr->style & LBS_DISABLENOSCROLL)
+            {
+                info.nMin  = 0;
+                info.nMax  = 0;
+                info.fMask = SIF_RANGE | SIF_DISABLENOSCROLL;
+                SetScrollInfo( descr->self, SB_HORZ, &info, TRUE );
+            }
+            else
+            {
+                ShowScrollBar( descr->self, SB_HORZ, FALSE );
+            }
         }
     }
 }
@@ -313,7 +327,8 @@
         ScrollWindowEx( descr->self, 0, diff, NULL, NULL, 0, NULL,
                         SW_INVALIDATE | SW_ERASE | SW_SCROLLCHILDREN );
     }
-    if (!scroll) InvalidateRect( descr->self, NULL, TRUE );
+    else
+        InvalidateRect( descr->self, NULL, TRUE );
     descr->top_item = index;
     LISTBOX_UpdateScroll( descr );
     return LB_OKAY;
@@ -1244,6 +1259,8 @@
         info.nMin  = 0;
         info.nMax = descr->horz_extent ? descr->horz_extent - 1 : 0;
         info.fMask = SIF_RANGE;
+        if (descr->style & LBS_DISABLENOSCROLL)
+            info.fMask |= SIF_DISABLENOSCROLL;
         SetScrollInfo( descr->self, SB_HORZ, &info, TRUE );
     }
     if (descr->horz_pos > extent - descr->width)
@@ -2908,7 +2925,7 @@
 
     case LB_SETCURSEL:
         if (IS_MULTISELECT(descr)) return LB_ERR;
-        LISTBOX_SetCaretIndex( descr, wParam, FALSE );
+        LISTBOX_SetCaretIndex( descr, wParam, TRUE );
         ret = LISTBOX_SetSelection( descr, wParam, TRUE, FALSE );
 	if (ret != LB_ERR) ret = descr->selected_item;
 	return ret;