Fixed some warnings

[wxWidgets.git] / src / msw / headerctrl.cpp

diff --git a/src/msw/headerctrl.cpp b/src/msw/headerctrl.cpp
index 921a97d1cadcc2864f042b42ee33d7bca3c9b714..6a5a417acc82e08dd34affb60a443edfd7c9c868 100644 (file)
--- a/src/msw/headerctrl.cpp
+++ b/src/msw/headerctrl.cpp
@@ -64,6 +64,7 @@ void wxHeaderCtrl::Init()
     m_numColumns = 0;
     m_imageList = NULL;
     m_scrollOffset = 0;
+    m_colBeingDragged = -1;
 }
 
 bool wxHeaderCtrl::Create(wxWindow *parent,
@@ -268,7 +269,7 @@ void wxHeaderCtrl::DoInsertItem(const wxHeaderColumn& col, unsigned int idx)
     // notice that we need to store the string we use the pointer to until we
     // pass it to the control
     hdi.mask |= HDI_TEXT;
-    wxWxCharBuffer buf = col.GetTitle().wx_str();
+    wxWxCharBuffer buf = col.GetTitle().t_str();
     hdi.pszText = buf.data();
     hdi.cchTextMax = wxStrlen(buf);
 
@@ -285,6 +286,7 @@ void wxHeaderCtrl::DoInsertItem(const wxHeaderColumn& col, unsigned int idx)
             if ( !m_imageList )
             {
                 m_imageList = new wxImageList(bmpWidth, bmpHeight);
+                (void) // suppress mingw32 warning about unused computed value
                 Header_SetImageList(GetHwnd(), GetHimagelistOf(m_imageList));
             }
             else // already have an image list
@@ -524,6 +526,9 @@ bool wxHeaderCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         case HDN_ITEMCLICK:
         case HDN_ITEMDBLCLICK:
             evtType = GetClickEventType(code == HDN_ITEMDBLCLICK, nmhdr->iButton);
+
+            // We're not dragging any more.
+            m_colBeingDragged = -1;
             break;
 
             // although we should get the notifications about the right clicks
@@ -560,7 +565,7 @@ bool wxHeaderCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         // ASCII and Unicode versions of this message
         case HDN_BEGINTRACKA:
         case HDN_BEGINTRACKW:
-            // non-resizeable columns can't be resized no matter what, don't
+            // non-resizable columns can't be resized no matter what, don't
             // even generate any events for them
             if ( !GetColumn(idx).IsResizeable() )
             {
@@ -586,6 +591,11 @@ bool wxHeaderCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             }
             break;
 
+            // The control is not supposed to send HDN_TRACK when using
+            // HDS_FULLDRAG (which we do use) but apparently some versions of
+            // comctl32.dll still do it, see #13506, so catch both messages
+            // just in case we are dealing with one of these buggy versions.
+        case HDN_TRACK:
         case HDN_ITEMCHANGING:
             if ( nmhdr->pitem && (nmhdr->pitem->mask & HDI_WIDTH) )
             {
@@ -616,8 +626,18 @@ bool wxHeaderCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             if ( nmhdr->iItem == -1 )
                 break;
 
+            // If we are dragging a column that is not draggable and the mouse
+            // is moved over a different column then we get the column number from
+            // the column under the mouse. This results in an unexpected behaviour
+            // if this column is draggable. To prevent this remember the column we
+            // are dragging for the complete drag and drop cycle.
+            if ( m_colBeingDragged == -1 )
+            {
+                m_colBeingDragged = idx;
+            }
+
             // column must have the appropriate flag to be draggable
-            if ( !GetColumn(idx).IsReorderable() )
+            if ( !GetColumn(m_colBeingDragged).IsReorderable() )
             {
                 veto = true;
                 break;
@@ -638,10 +658,16 @@ bool wxHeaderCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             order = MSWFromNativeOrder(order);
 
             evtType = wxEVT_COMMAND_HEADER_END_REORDER;
+
+            // We (successfully) ended dragging the column.
+            m_colBeingDragged = -1;
             break;
 
         case NM_RELEASEDCAPTURE:
             evtType = wxEVT_COMMAND_HEADER_DRAGGING_CANCELLED;
+
+            // Dragging the column was cancelled.
+            m_colBeingDragged = -1;
             break;
     }
 
@@ -656,22 +682,24 @@ bool wxHeaderCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         if ( order != -1 )
             event.SetNewOrder(order);
 
-        if ( GetEventHandler()->ProcessEvent(event) )
-        {
-            if ( event.IsAllowed() )
-                return true;    // skip default message handling below
+        const bool processed = GetEventHandler()->ProcessEvent(event);
 
-            // we need to veto the default handling of this message, don't
-            // return to execute the code in the "if veto" branch below
+        if ( processed && !event.IsAllowed() )
             veto = true;
-        }
-        else // not processed
+
+        if ( !veto )
         {
             // special post-processing for HDN_ENDDRAG: we need to update the
             // internal column indices array if this is allowed to go ahead as
             // the native control is going to reorder its columns now
             if ( evtType == wxEVT_COMMAND_HEADER_END_REORDER )
                 MoveColumnInOrderArray(m_colIndices, idx, order);
+
+            if ( processed )
+            {
+                // skip default processing below
+                return true;
+            }
         }
     }