/// <summary>
/// Checks to see if the item being injected implements the IDockAware interface and creates the necessary data bindings.
/// </summary>
/// <remarks>
/// First we will check if the ContentPane.Content property implements the IDockAware interface. Depending on the type of item being injected,
/// this may be a View or a ViewModel. If no IDockAware interface is found to create a binding, we next move to the ContentPane.DataContext property, which will
/// most likely be a ViewModel.
/// </remarks>
/// <param name="container"></param>
void CreateDockAwareBindings(ContentPane contentPane)
{
Binding binding = new Binding("Header");
//let's first check the item that was injected for IDockAware. This may be a View or ViewModel
var dockAwareContent = contentPane.Content as IDockAware;
if (dockAwareContent != null)
{
binding.Source = dockAwareContent;
if (dockAwareContent.Image != null)
{
Binding imageBinding = new Binding("Image");
imageBinding.Converter = new ResourceTypeToIconConverter();
imageBinding.Source = dockAwareContent;
contentPane.SetBinding(ContentPane.ImageProperty, imageBinding);
}
}
//nothing was found on the item being injected, let's check the DataContext
if (binding.Source == null)
{
//fall back to data context of the content pane, which is most likely a ViewModel
var dockAwareDataContext = contentPane.DataContext as IDockAware;
if (dockAwareDataContext != null)
{
binding.Source = dockAwareDataContext;
}
}
contentPane.SetBinding(HeaderedContentControl.HeaderProperty, binding);
}
/// <summary>
/// Invoked when a ContentPane for a given item is being removed.
/// </summary>
/// <param name="cp">The pane being removed</param>
protected virtual void RemovePane(ContentPane cp)
{
// we need to temporarily change the close action while we close it
DependencyProperty closeProp = ContentPane.CloseActionProperty;
if (cp == null)
{
return;
}
object oldValue = cp.ReadLocalValue(closeProp);
BindingExpressionBase oldExpression = cp.GetBindingExpression(closeProp);
cp.CloseAction = PaneCloseAction.RemovePane;
// restore the original close action
if (oldExpression != null)
{
cp.SetBinding(closeProp, oldExpression.ParentBindingBase);
}
else if (oldValue == DependencyProperty.UnsetValue)
{
cp.ClearValue(closeProp);
}
else
{
cp.SetValue(closeProp, oldValue);
}
cp.PreviewMouseDown -= PaneOnPreviewMouseDown;
}
protected virtual void RemovePane(ContentPane cp)
{
var closeProp = ContentPane.CloseActionProperty;
if (cp == null)
{
return;
}
var oldValue = cp.ReadLocalValue(closeProp);
BindingExpressionBase oldExpression = cp.GetBindingExpression(closeProp);
cp.CloseAction = PaneCloseAction.RemovePane;
if (oldExpression != null)
{
cp.SetBinding(closeProp, oldExpression.ParentBindingBase);
}
else if (oldValue == DependencyProperty.UnsetValue)
{
cp.ClearValue(closeProp);
}
else
{
cp.SetValue(closeProp, oldValue);
}
cp.PreviewMouseDown -= PaneOnPreviewMouseDown;
}
/// <summary>
/// Invoked when a ContentPane for a given item is being removed.
/// </summary>
/// <param name="cp">The pane being removed</param>
protected virtual void RemovePane(ContentPane cp)
{
// we need to temporarily change the close action while we close it
DependencyProperty closeProp = ContentPane.CloseActionProperty;
if(cp == null)
{
return;
}
object oldValue = cp.ReadLocalValue(closeProp);
BindingExpressionBase oldExpression = cp.GetBindingExpression(closeProp);
cp.CloseAction = PaneCloseAction.RemovePane;
// restore the original close action
if(oldExpression != null)
{
cp.SetBinding(closeProp, oldExpression.ParentBindingBase);
}
else if(oldValue == DependencyProperty.UnsetValue)
{
cp.ClearValue(closeProp);
}
else
{
cp.SetValue(closeProp, oldValue);
}
}
