public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is HeaderFooter)
{
return(((HeaderFooter)value).Element);
}
if (value is SectionCell)
{
SectionCell sc = (SectionCell)value;
ICell cell = null;
if (sc.SectionCellRequested != null)
{
cell = sc.SectionCellRequested(sc.CellIndex, null);
}
else if (sc.CellRequested != null)
{
cell = sc.CellRequested(sc.SectionIndex, sc.CellIndex, null);
}
sc.Cell = cell;
CustomItemContainer container = cell as CustomItemContainer;
if (container != null)
{
var custom = container.CustomItem as FrameworkElement;
System.Windows.Controls.Grid.SetColumn(custom, sc.SectionIndex % 2);
return(custom);
}
var element = WpfFactory.GetNativeObject <FrameworkElement>(cell, "cell", true);
if (element != null)
{
System.Windows.Controls.Grid.SetColumn(element, sc.SectionIndex % 2);
element.Unloaded += (o, e) =>
{
var gridCell = o as IGridCell;
var view = parameter as ListView;
if (view != null && gridCell != null)
{
view.SetSubmitValue(gridCell);
}
};
}
return(element);
}
return(value);
}
public void ReloadSections()
{
if (!firstColumnItems.IsEnabled)
{
return;
}
if (ColumnMode == UI.ColumnMode.TwoColumns)
{
if (secondColumnItems == null)
{
secondColumnItems = new ListBox()
{
HorizontalContentAlignment = System.Windows.HorizontalAlignment.Stretch,
ItemContainerStyle = (Style)Resources["ListBoxItemStyle"],
ItemTemplateSelector = new CellTemplateSelector(this),
BorderThickness = new Thickness(0),
Background = firstColumnItems.Background,
Padding = new Thickness(8, 0, 10, 0)
};
System.Windows.Controls.Grid.SetColumn(secondColumnItems, 1);
ScrollViewer.SetHorizontalScrollBarVisibility(secondColumnItems, ScrollBarVisibility.Disabled);
ScrollViewer.SetCanContentScroll(secondColumnItems, false);
KeyboardNavigation.SetTabNavigation(secondColumnItems, KeyboardNavigationMode.Continue);
secondColumnItems.SelectionChanged += (o, e) =>
{
if (e.AddedItems.Count > 0)
{
firstColumnItems.UnselectAll();
}
};
firstColumnItems.SelectionChanged += (o, e) =>
{
if (e.AddedItems.Count > 0 && secondColumnItems != null)
{
secondColumnItems.UnselectAll();
}
};
}
if (!container.Children.Contains(secondColumnItems))
{
container.ColumnDefinitions.Insert(1, new ColumnDefinition()
{
Width = new GridLength(1, GridUnitType.Star)
});
container.Children.Add(secondColumnItems);
ScrollViewer.SetVerticalScrollBarVisibility(firstColumnItems, ScrollBarVisibility.Hidden);
ScrollViewer.SetCanContentScroll(firstColumnItems, false);
var scroller = firstColumnItems.FindChild <ScrollViewer>(null);
if (scroller != null)
{
scroller.ScrollChanged -= SyncScrollBars;
scroller.ScrollChanged += SyncScrollBars;
}
secondColumnItems.ApplyTemplate();
scroller = secondColumnItems.FindChild <ScrollViewer>(null);
if (scroller != null)
{
scroller.ScrollChanged -= SyncScrollBars;
scroller.ScrollChanged += SyncScrollBars;
}
}
List <object> firstItems = new List <object>();
for (int i = 0; i < Sections.Count; i += 2)
{
Section section = Sections[i];
firstItems.Add(new HeaderFooter()
{
Element = WpfFactory.GetNativeObject <UIElement>(section.Header, "Header", true)
});
for (int j = 0; j < section.ItemCount; j++)
{
var sc = new SectionCell()
{
CellIndex = j, SectionIndex = i
};
if (section.CellRequested != null)
{
sc.SectionCellRequested = section.CellRequested;
}
else
{
sc.CellRequested = CellRequested;
}
firstItems.Add(sc);
}
firstItems.Add(new HeaderFooter()
{
Element = WpfFactory.GetNativeObject <UIElement>(section.Footer, "Footer", true)
});
}
firstColumnItems.ItemsSource = firstItems;
firstColumnItems.Padding = new Thickness(10, 0, 8 + SystemParameters.ScrollWidth, 0);
List <object> secondItems = new List <object>();
for (int i = 1; i < Sections.Count; i += 2)
{
Section section = Sections[i];
secondItems.Add(new HeaderFooter()
{
Element = WpfFactory.GetNativeObject <UIElement>(section.Header, "Header", true)
});
for (int j = 0; j < section.ItemCount; j++)
{
var sc = new SectionCell()
{
CellIndex = j, SectionIndex = i
};
if (section.CellRequested != null)
{
sc.SectionCellRequested = section.CellRequested;
}
else
{
sc.CellRequested = CellRequested;
}
secondItems.Add(sc);
}
secondItems.Add(new HeaderFooter()
{
Element = WpfFactory.GetNativeObject <UIElement>(section.Footer, "Footer", true)
});
}
secondColumnItems.ItemsSource = secondItems;
}
else
{
if (secondColumnItems != null && container.Children.Contains(secondColumnItems))
{
container.Children.Remove(secondColumnItems);
container.ColumnDefinitions.RemoveAt(1);
ScrollViewer.SetVerticalScrollBarVisibility(firstColumnItems, ScrollBarVisibility.Auto);
ScrollViewer.SetCanContentScroll(firstColumnItems, true);
var scroller = firstColumnItems.FindChild <ScrollViewer>(null);
if (scroller != null)
{
scroller.ScrollChanged -= SyncScrollBars;
}
scroller = secondColumnItems.FindChild <ScrollViewer>(null);
if (scroller != null)
{
scroller.ScrollChanged -= SyncScrollBars;
}
secondColumnItems = null;
}
var items = new List <object>();
for (int i = 0; i < Sections.Count; i++)
{
Section section = Sections[i];
items.Add(new HeaderFooter()
{
Element = WpfFactory.GetNativeObject <UIElement>(section.Header, "Header", true)
});
for (int j = 0; j < section.ItemCount; j++)
{
var sc = new SectionCell()
{
CellIndex = j, SectionIndex = i
};
if (section.CellRequested != null)
{
sc.SectionCellRequested = section.CellRequested;
}
else
{
sc.CellRequested = CellRequested;
}
items.Add(sc);
}
items.Add(new HeaderFooter()
{
Element = WpfFactory.GetNativeObject <UIElement>(section.Footer, "Footer", true)
});
}
firstColumnItems.ItemsSource = items;
firstColumnItems.Padding = new Thickness(0);
}
}
