/// <summary>
/// Adds the text content of a node to the object.
/// </summary>
/// <param name="text">The text to add to the object</param>
public void AddText(string text)
{
GalleryItem item = new GalleryItem();
item.Content = text;
Items.Add(item);
}
/// <summary>
/// When overridden in a derived class, is invoked whenever
/// application code or internal processes call ApplyTemplate
/// </summary>
public override void OnApplyTemplate()
{
if (textBox != null)
{
textBox.TextChanged -= OnTextBoxTextChanged;
textBox.PreviewKeyDown -= OnTextBoxPreviewKeyDown;
textBox.SelectionChanged -= OnTextBoxSelectionChanged;
}
textBox = GetTemplateChild("PART_TextBox") as System.Windows.Controls.TextBox;
if (textBox != null)
{
textBox.TextChanged += OnTextBoxTextChanged;
textBox.PreviewKeyDown += OnTextBoxPreviewKeyDown;
textBox.SelectionChanged += OnTextBoxSelectionChanged;
textBox.Text = CurrentText;
}
selectedGalleryItem = GetTemplateChild("PART_GalleryItem") as GalleryItem;
fakeImage = GetTemplateChild("PART_FakeImage") as Image;
contentBorder = GetTemplateChild("PART_ContentBorder") as Border;
if (contextMenu != null)
{
contextMenu.PlacementTarget = contentBorder;
}
}
// Coerce selected item
private static object CoerceSelectedItem(DependencyObject d, object basevalue)
{
Gallery gallery = (Gallery)d;
if (!gallery.Selectable)
{
GalleryItem galleryItem = (GalleryItem)gallery.ItemContainerGenerator.ContainerFromItem(basevalue);
if (basevalue != null && galleryItem != null)
{
galleryItem.IsSelected = false;
}
return(null);
}
return(basevalue);
}
/// <summary>
/// Handles Command changed
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
GalleryItem control = d as GalleryItem;
EventHandler handler = control.OnCommandCanExecuteChanged;
if (e.OldValue != null)
{
(e.OldValue as ICommand).CanExecuteChanged -= handler;
}
if (e.NewValue != null)
{
handler = new EventHandler(control.OnCommandCanExecuteChanged);
control.canExecuteChangedHandler = handler;
(e.NewValue as ICommand).CanExecuteChanged += handler;
//RoutedUICommand cmd = e.NewValue as RoutedUICommand;
//if ((cmd != null) && (control.Content==null)) control.Content = cmd.Text;
}
control.UpdateCanExecute();
}
private double GetItemWidth()
{
if (double.IsNaN(ItemWidth) && (listBox != null) && (listBox.Items.Count > 0))
{
GalleryItem item = (listBox.ItemContainerGenerator.ContainerFromItem(listBox.Items[0]) as GalleryItem);
bool useHack = false;
if (item == null)
{
useHack = true;
RemoveLogicalChild(listBox.Items[0]);
item = new GalleryItem();
item.Width = ItemWidth;
item.Height = ItemHeight;
if (ItemContainerStyle != null)
{
item.Style = ItemContainerStyle;
}
if (ItemTemplate != null)
{
item.Content = ItemTemplate;
item.DataContext = listBox.Items[0];
}
else
{
item.Content = listBox.Items[0];
}
}
item.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
if (useHack)
{
item.Content = null;
AddLogicalChild(listBox.Items[0]);
}
return(item.DesiredSize.Width);
}
return(ItemWidth);
}
private void CancelPreview(GalleryItem galleryItem)
{
Trace.WriteLine(string.Format("CancelPreview: {0}", galleryItem));
}
private double GetItemWidth()
{
if (double.IsNaN(ItemWidth) && (listBox != null) && (listBox.Items.Count > 0))
{
GalleryItem item = (listBox.ItemContainerGenerator.ContainerFromItem(listBox.Items[0]) as GalleryItem);
bool useHack = false;
if (item == null)
{
useHack = true;
RemoveLogicalChild(listBox.Items[0]);
item = new GalleryItem();
item.Width = ItemWidth;
item.Height = ItemHeight;
if (ItemContainerStyle != null) item.Style = ItemContainerStyle;
if (ItemTemplate != null)
{
item.Content = ItemTemplate;
item.DataContext = listBox.Items[0];
}
else item.Content = listBox.Items[0];
}
item.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
if (useHack)
{
item.Content = null;
AddLogicalChild(listBox.Items[0]);
}
return item.DesiredSize.Width;
}
return ItemWidth;
}
/// <summary>
/// Adds the text content of a node to the object.
/// </summary>
/// <param name="text">The text to add to the object</param>
public void AddText(string text)
{
GalleryItem item = new GalleryItem();
item.Content = text;
Items.Add(item);
}