/// <summary>
/// Handle the MenuItem's Click event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void ContextMenuItem_Click(object sender, RoutedEventArgs e)
{
MenuItem mi = sender as MenuItem;
if (mi == null)
{
return;
}
int index;
// get the index of the TabItem from the manuitems Tag property
bool b = int.TryParse(mi.Tag.ToString(), out index);
if (b)
{
TabItem tabItem = this.Items[index] as TabItem;
if (tabItem != null)
{
VirtualizingTabPanel itemsHost = Helper.FindVirtualizingTabPanel(this);
if (itemsHost != null)
{
itemsHost.MakeVisible(tabItem, Rect.Empty);
}
tabItem.Focus();
if (TabItemSelected != null)
{
TabItemSelected(this, new TabItemEventArgs(tabItem));
}
}
}
}
/// <summary>
/// Find the Panel for the TabControl
/// </summary>
public static VirtualizingTabPanel FindVirtualizingTabPanel(Visual visual)
{
if (visual == null)
{
return(null);
}
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(visual); i++)
{
Visual child = VisualTreeHelper.GetChild(visual, i) as Visual;
if (child != null)
{
if (child is VirtualizingTabPanel)
{
object temp = child;
return((VirtualizingTabPanel)temp);
}
VirtualizingTabPanel panel = FindVirtualizingTabPanel(child);
if (panel != null)
{
object temp = panel;
return((VirtualizingTabPanel)temp); // return the panel up the call stack
}
}
}
return(null);
}
/// <summary>
/// OnMinMaxChanged callback responds to any of the Min/Max dependancy properties changing
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
private static void OnMinMaxChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TabControl tc = (TabControl)d;
if (tc.Template == null)
{
return;
}
VirtualizingTabPanel tp = Helper.FindVirtualizingTabPanel(tc);
if (tp != null)
{
tp.InvalidateMeasure();
}
}
/*
* Protected override methods
*
*/
/// <summary>
/// OnApplyTemplate override
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
// set up the event handler for the template parts
_toggleButton = this.Template.FindName("PART_DropDown", this) as ToggleButton;
if (_toggleButton != null)
{
// create a context menu for the togglebutton
System.Windows.Controls.ContextMenu cm = new ContextMenu();
cm.PlacementTarget = _toggleButton;
cm.Placement = PlacementMode.Bottom;
// create a binding between the togglebutton's IsChecked Property
// and the Context Menu's IsOpen Property
Binding b = new Binding();
b.Source = _toggleButton;
b.Mode = BindingMode.TwoWay;
b.Path = new PropertyPath(ToggleButton.IsCheckedProperty);
cm.SetBinding(ContextMenu.IsOpenProperty, b);
_toggleButton.ContextMenu = cm;
_toggleButton.Checked += DropdownButton_Checked;
}
ScrollViewer scrollViewer = this.Template.FindName("PART_ScrollViewer", this) as ScrollViewer;
// set up event handlers for the RepeatButtons Click event
RepeatButton repeatLeft = this.Template.FindName("PART_RepeatLeft", this) as RepeatButton;
if (repeatLeft != null)
{
repeatLeft.Click += delegate
{
if (scrollViewer != null)
{
scrollViewer.LineLeft();
}
GC.Collect();
};
}
RepeatButton repeatRight = this.Template.FindName("PART_RepeatRight", this) as RepeatButton;
if (repeatRight != null)
{
repeatRight.Click += delegate
{
if (scrollViewer != null)
{
scrollViewer.LineRight();
}
GC.Collect();
};
}
// set up the event handler for the 'New Tab' Button Click event
ButtonBase button = this.Template.FindName("PART_NewTabButton", this) as ButtonBase;
if (button != null)
{
button.Click += delegate
{
int i = this.SelectedIndex;
TabItem item = new TabItem();
item.Header = "New Tab";
if (i == -1 || i == this.Items.Count - 1 || AddNewTabToEnd)
{
this.Items.Add(item);
}
else
{
this.Items.Insert(++i, item);
}
if (SelectNewTabOnCreate)
{
SelectedItem = item;
VirtualizingTabPanel itemsHost = Helper.FindVirtualizingTabPanel(this);
if (itemsHost != null)
{
itemsHost.MakeVisible(item, Rect.Empty);
}
item.Focus();
if (TabItemSelected != null)
{
TabItemSelected(this, new TabItemEventArgs(item));
}
}
if (TabItemAdded != null)
{
TabItemAdded(this, new TabItemEventArgs(item));
}
};
}
}
