Add ellipsization support to wxDataViewCtrl.

Implemented ellipsization in the generic, GTK and both OS X Carbon and Cocoa
versions but it currently doesn't work well in GTK as it changes the item
alignment unconditionally, this will need to be fixed later.

The behaviour for the columns is currently inconsistent between ports too:
under MSW they (natively) use wxELLIPSIZE_END, under GTK -- wxELLIPSIZE_NONE
and under OS X the same ellipsization mode as the column contents, i.e.
wxELLIPSIZE_MIDDLE by default.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62433 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/dataview.mm

@@ -159,13 +159,19 @@ static NSTableColumn* CreateNativeColumn(wxDataViewColumn const* columnPtr)
    // setting the visibility:
     [nativeColumn setHidden:static_cast<BOOL>(columnPtr->IsHidden())];
 #endif
+
+    wxDataViewRendererNativeData * const
+        renderData = columnPtr->GetRenderer()->GetNativeData();
+
    // setting the header:
     [[nativeColumn headerCell] setAlignment:ConvertToNativeHorizontalTextAlignment(columnPtr->GetAlignment())];
     [[nativeColumn headerCell] setStringValue:[[wxCFStringRef(columnPtr->GetTitle()).AsNSString() retain] autorelease]];
+    renderData->ApplyLineBreakMode([nativeColumn headerCell]);
+
    // setting data cell's properties:
     [[nativeColumn dataCell] setWraps:NO];
    // setting the default data cell:
-    [nativeColumn setDataCell:columnPtr->GetRenderer()->GetNativeData()->GetColumnCell()];
+    [nativeColumn setDataCell:renderData->GetColumnCell()];
    // setting the editablility:
     bool const dataCellIsEditable = (columnPtr->GetRenderer()->GetMode() == wxDATAVIEW_CELL_EDITABLE);
 
@@ -1026,7 +1032,6 @@ wxWidgetImplType* CreateDataView(wxWindowMac* wxpeer, wxWindowMac* WXUNUSED(pare
   if (self != nil)
   {
    // initializing the text part:
-    [self setLineBreakMode:NSLineBreakByTruncatingMiddle];
     [self setSelectable:YES];
    // initializing the image part:
     image       = nil;
@@ -1566,6 +1571,7 @@ wxWidgetImplType* CreateDataView(wxWindowMac* wxpeer, wxWindowMac* WXUNUSED(pare
     if ( colText )
         [cell setTextColor:colText];
 
+
     data->SetColumnPtr(tableColumn);
     data->SetItem(item);
     data->SetItemCell(cell);
@@ -2120,6 +2126,47 @@ wxDataObjectComposite* wxCocoaDataViewControl::GetDnDDataObjects(NSData* dataObj
   }
 }
 
+// ----------------------------------------------------------------------------
+// wxDataViewRendererNativeData
+// ----------------------------------------------------------------------------
+
+void wxDataViewRendererNativeData::Init()
+{
+    m_origFont = NULL;
+    m_origTextColour = NULL;
+    m_ellipsizeMode = wxELLIPSIZE_MIDDLE;
+
+    if ( m_ColumnCell )
+        ApplyLineBreakMode(m_ColumnCell);
+}
+
+void wxDataViewRendererNativeData::ApplyLineBreakMode(NSCell *cell)
+{
+    NSLineBreakMode nsMode = NSLineBreakByWordWrapping;
+    switch ( m_ellipsizeMode )
+    {
+        case wxELLIPSIZE_NONE:
+            nsMode = NSLineBreakByClipping;
+            break;
+
+        case wxELLIPSIZE_START:
+            nsMode = NSLineBreakByTruncatingHead;
+            break;
+
+        case wxELLIPSIZE_MIDDLE:
+            nsMode = NSLineBreakByTruncatingMiddle;
+            break;
+
+        case wxELLIPSIZE_END:
+            nsMode = NSLineBreakByTruncatingTail;
+            break;
+    }
+
+    wxASSERT_MSG( nsMode != NSLineBreakByWordWrapping, "unknown wxEllipsizeMode" );
+
+    [cell setLineBreakMode: nsMode];
+}
+
 // ---------------------------------------------------------
 // wxDataViewRenderer
 // ---------------------------------------------------------
@@ -2152,6 +2199,22 @@ void wxDataViewRenderer::SetNativeData(wxDataViewRendererNativeData* newNativeDa
   m_NativeDataPtr = newNativeDataPtr;
 }
 
+void wxDataViewRenderer::EnableEllipsize(wxEllipsizeMode mode)
+{
+    // we need to store this value to apply it to the columns headerCell in
+    // CreateNativeColumn()
+    GetNativeData()->SetEllipsizeMode(mode);
+
+    // but we may already apply it to the column cell which will be used for
+    // this column
+    GetNativeData()->ApplyLineBreakMode(GetNativeData()->GetColumnCell());
+}
+
+wxEllipsizeMode wxDataViewRenderer::GetEllipsizeMode() const
+{
+    return GetNativeData()->GetEllipsizeMode();
+}
+
 IMPLEMENT_ABSTRACT_CLASS(wxDataViewRenderer,wxDataViewRendererBase)
 
 // ---------------------------------------------------------
@@ -2182,7 +2245,6 @@ wxDataViewTextRenderer::wxDataViewTextRenderer(wxString const& varianttype, wxDa
 
   cell = [[NSTextFieldCell alloc] init];
   [cell setAlignment:ConvertToNativeHorizontalTextAlignment(align)];
-  [cell setLineBreakMode:NSLineBreakByTruncatingMiddle];
   SetNativeData(new wxDataViewRendererNativeData(cell));
   [cell release];
 }
@@ -2285,7 +2347,6 @@ wxDataViewDateRenderer::wxDataViewDateRenderer(wxString const& varianttype, wxDa
   [dateFormatter setDateStyle:NSDateFormatterShortStyle];
   cell = [[NSTextFieldCell alloc] init];
   [cell setFormatter:dateFormatter];
-  [cell setLineBreakMode:NSLineBreakByTruncatingMiddle];
   SetNativeData(new wxDataViewRendererNativeData(cell,[NSDate dateWithString:@"2000-12-30 20:00:00 +0000"]));
   [cell          release];
   [dateFormatter release];