added wxHeaderCtrl::ResetColumnsOrder() function; use it from wxGrid

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57337 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/headerctrl.h

@@ -98,6 +98,9 @@ public:
     // get the position at which this column is currently displayed
     unsigned int GetColumnPos(unsigned int idx) const;
 
+    // reset the columns order to the natural one
+    void ResetColumnsOrder();
+
     // helper function used by the generic version of this control and also
     // wxGrid: reshuffles the array of column indices indexed by positions
     // (i.e. using the same convention as for SetColumnsOrder()) so that the

interface/wx/headerctrl.h

@@ -268,6 +268,14 @@ public:
      */
     unsigned int GetColumnPos(unsigned int idx) const;
 
+    /**
+        Reset the columns order to the natural one.
+
+        After calling this function, the column with index @c idx appears at
+        position @c idx in the control.
+     */
+    void ResetColumnsOrder();
+
     /**
         Helper function to manipulate the array of column indices.
 

src/common/headerctrlcmn.cpp

@@ -113,6 +113,16 @@ void wxHeaderCtrlBase::SetColumnsOrder(const wxArrayInt& order)
     // TODO-RTL: do we need to reverse the array?
 }
 
+void wxHeaderCtrlBase::ResetColumnsOrder()
+{
+    const unsigned count = GetColumnCount();
+    wxArrayInt order(count);
+    for ( unsigned n = 0; n < count; n++ )
+        order[n] = n;
+
+    DoSetColumnsOrder(order);
+}
+
 wxArrayInt wxHeaderCtrlBase::GetColumnsOrder() const
 {
     const wxArrayInt order = DoGetColumnsOrder();

src/generic/grid.cpp

@@ -6883,6 +6883,11 @@ void wxGrid::SetColPos(int idx, int pos)
 void wxGrid::ResetColPos()
 {
     m_colAt.clear();
+
+    if ( m_useNativeHeader )
+        GetColHeader()->ResetColumnsOrder();
+    else
+        m_colWindow->Refresh();
 }
 
 void wxGrid::EnableDragColMove( bool enable )