Ensure there is valid context for DrawRectangle

[wxWidgets.git] / src / generic / grid.cpp

diff --git a/src/generic/grid.cpp b/src/generic/grid.cpp
index 670f3d5923baed1466aef54087674cd148adc780..6bd231ea0bad15d47874713e316789d75d30ef6c 100644 (file)
--- a/src/generic/grid.cpp
+++ b/src/generic/grid.cpp
@@ -146,6 +146,7 @@ wxDEFINE_EVENT( wxEVT_GRID_LABEL_LEFT_DCLICK, wxGridEvent );
 wxDEFINE_EVENT( wxEVT_GRID_LABEL_RIGHT_DCLICK, wxGridEvent );
 wxDEFINE_EVENT( wxEVT_GRID_ROW_SIZE, wxGridSizeEvent );
 wxDEFINE_EVENT( wxEVT_GRID_COL_SIZE, wxGridSizeEvent );
+wxDEFINE_EVENT( wxEVT_GRID_COL_AUTO_SIZE, wxGridSizeEvent );
 wxDEFINE_EVENT( wxEVT_GRID_COL_MOVE, wxGridEvent );
 wxDEFINE_EVENT( wxEVT_GRID_COL_SORT, wxGridEvent );
 wxDEFINE_EVENT( wxEVT_GRID_RANGE_SELECT, wxGridRangeSelectEvent );
@@ -3720,7 +3721,8 @@ void wxGrid::ProcessColLabelMouseEvent( wxMouseEvent& event )
             // adjust column width depending on label text
             //
             // TODO: generate RESIZING event, see #10754
-            AutoSizeColLabelSize( colEdge );
+            if ( !SendGridSizeEvent(wxEVT_GRID_COL_AUTO_SIZE, -1, colEdge, event) )
+                AutoSizeColLabelSize( colEdge );
 
             SendGridSizeEvent(wxEVT_GRID_COL_SIZE, -1, colEdge, event);
 
@@ -4642,7 +4644,7 @@ wxGrid::DoAppendLines(bool (wxGridTableBase::*funcAppend)(size_t),
 // event generation helpers
 // ----------------------------------------------------------------------------
 
-void
+bool
 wxGrid::SendGridSizeEvent(wxEventType type,
                       int row, int col,
                       const wxMouseEvent& mouseEv)
@@ -4657,7 +4659,7 @@ wxGrid::SendGridSizeEvent(wxEventType type,
            mouseEv.GetY() + GetColLabelSize(),
            mouseEv);
 
-   GetEventHandler()->ProcessEvent(gridEvt);
+   return GetEventHandler()->ProcessEvent(gridEvt);
 }
 
 // Generate a grid event based on a mouse event and return:
@@ -6675,17 +6677,28 @@ int wxGrid::PosToEdgeOfLine(int pos, const wxGridOperations& oper) const
     // Get the bottom or rightmost line that could match.
     int line = oper.PosToLine(this, pos, true);
 
-    // Go backwards until we find a line that is big enough.
-    while ( oper.GetLineSize(this, line) <= WXGRID_LABEL_EDGE_ZONE )
+    if ( oper.GetLineSize(this, line) > WXGRID_LABEL_EDGE_ZONE )
     {
-        line = oper.GetLineBefore(this, line);
-        if ( line <= 0 )
-            break;
-    }
+        // We know that we are in this line, test whether we are close enough
+        // to start or end border, respectively.
+        if ( abs(oper.GetLineEndPos(this, line) - pos) < WXGRID_LABEL_EDGE_ZONE )
+            return line;
+        else if ( line > 0 &&
+                    pos - oper.GetLineStartPos(this,
+                                               line) < WXGRID_LABEL_EDGE_ZONE )
+        {
+            // We need to find the previous visible line, so skip all the
+            // hidden (of size 0) ones.
+            do
+            {
+                line = oper.GetLineBefore(this, line);
+            }
+            while ( line >= 0 && oper.GetLineSize(this, line) == 0 );
 
-    // If the bottom or right touches then we have a match
-    if ( abs(oper.GetLineEndPos(this, line) - pos) < WXGRID_LABEL_EDGE_ZONE )
-      return line;
+            // It can possibly be -1 here.
+            return line;
+        }
+    }
 
     return -1;
 }