Add support for date format to wxGridCellDateEditor too

This is needed to allow editing the cells using wxGridCellDateRenderer
with a custom format, otherwise the editor might parse the contents of
the cell differently from what is actually shown.

In particular, this ensures that using "date:%d.%m.%y" (or any other
custom format) as "cell type" works correctly, which wasn't the case
before.

include/wx/generic/grideditors.h

@@ -390,7 +390,9 @@ public:
 class WXDLLIMPEXP_ADV wxGridCellDateEditor : public wxGridCellEditor
 {
 public:
-    wxGridCellDateEditor() { }
+    explicit wxGridCellDateEditor(const wxString& format = wxString());
+
+    virtual void SetParameters(const wxString& params) wxOVERRIDE;
 
     virtual void Create(wxWindow* parent,
                         wxWindowID id,
@@ -414,6 +416,7 @@ protected:
 
 private:
     wxDateTime m_value;
+    wxString m_format;
 
     wxDECLARE_NO_COPY_CLASS(wxGridCellDateEditor);
 };

interface/wx/grid.h

@@ -1092,8 +1092,14 @@ class wxGridCellDateEditor : public wxGridCellEditor
 public:
     /**
         Date editor constructor.
+
+        @param format Optional format for the date displayed in the associated
+            cell. By default, the locale-specific date format ("%x") is assumed.
+            You would typically want to specify the same format as the one
+            used with the cell renderer, if a non-default one is used.
+            Note that this parameter is only available since wxWidgets 3.1.5.
     */
-    wxGridCellDateEditor();
+    explicit wxGridCellDateEditor(const wxString& format = wxString());
 };
 
 

src/generic/grideditors.cpp

@@ -1861,6 +1861,19 @@ struct wxGridCellDateEditorKeyHandler
 };
 #endif // __WXGTK__
 
+wxGridCellDateEditor::wxGridCellDateEditor(const wxString& format)
+{
+    SetParameters(format);
+}
+
+void wxGridCellDateEditor::SetParameters(const wxString& params)
+{
+    if ( params.empty() )
+        m_format = "%x";
+    else
+        m_format = params;
+}
+
 void wxGridCellDateEditor::Create(wxWindow* parent, wxWindowID id,
                                   wxEvtHandler* evtHandler)
 {
@@ -1908,7 +1921,7 @@ void wxGridCellDateEditor::BeginEdit(int row, int col, wxGrid* grid)
     wxASSERT_MSG(m_control, "The wxGridCellDateEditor must be created first!");
 
     const wxString dateStr = grid->GetTable()->GetValue(row, col);
-    if ( !m_value.ParseDate(dateStr) )
+    if ( !wxGridPrivate::TryParseDate(m_value, dateStr, m_format) )
     {
         // Invalidate m_value, so that it always compares different
         // to any value returned from DatePicker()->GetValue().
@@ -1960,7 +1973,7 @@ void wxGridCellDateEditor::Reset()
 
 wxGridCellEditor *wxGridCellDateEditor::Clone() const
 {
-    return new wxGridCellDateEditor();
+    return new wxGridCellDateEditor(m_format);
 }
 
 wxString wxGridCellDateEditor::GetValue() const