private void SubscribePanelEvents(INotifyingPanel panel)
{
panel.ChildrenCreated -= notifyingItem_ChildrenCreated;
panel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
panel.NotifyingChildren.CollectionChanged += OnVisualCollectionChanged;
}
private void notifyingItem_ChildrenCreated(object sender, EventArgs e)
{
//<function summary>
//</function summary>
INotifyingPanel panel = (INotifyingPanel)sender;
SubscribePanelEvents(panel);
}
private void SubscribePanelEvents(INotifyingPanel panel)
{
//<function summary>
//Set ChildrenCreated handler and update CollectionChanged Handler
//</function summary>
panel.ChildrenCreated -= notifyingItem_ChildrenCreated;
panel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
panel.NotifyingChildren.CollectionChanged += OnVisualCollectionChanged;
}
private void OnVisualCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
//<function summary>
// If there are new items in the collection then update the CollectionChanged handler
// Call the OnVisualChildAdded handler with the UIElement related to each new item
// Remove handlers from all the old items
//</function summary>
if (e.NewItems != null)
{
foreach (var item in e.NewItems)
{
INotifyingPanel notifyingPanel = item as INotifyingPanel;
if (notifyingPanel != null)
{
if (notifyingPanel.NotifyingChildren != null)
{
notifyingPanel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
notifyingPanel.NotifyingChildren.CollectionChanged += OnVisualCollectionChanged;
}
else
{
notifyingPanel.ChildrenCreated += notifyingItem_ChildrenCreated;
}
}
OnVisualChildAdded((UIElement)item, (UIElementCollection)sender);
}
}
if (e.OldItems != null)
{
foreach (var item in e.OldItems)
{
INotifyingPanel notifyingPanel = item as INotifyingPanel;
if (notifyingPanel != null)
{
notifyingPanel.ChildrenCreated -= notifyingItem_ChildrenCreated;
if (notifyingPanel.NotifyingChildren != null)
{
notifyingPanel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
}
}
OnVisualChildRemoved((UIElement)item, (UIElementCollection)sender);
}
}
}
private void OnVisualCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.NewItems != null)
{
foreach (var item in e.NewItems)
{
INotifyingPanel notifyingPanel = item as INotifyingPanel;
if (notifyingPanel != null)
{
if (notifyingPanel.NotifyingChildren != null)
{
notifyingPanel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
notifyingPanel.NotifyingChildren.CollectionChanged += OnVisualCollectionChanged;
}
else
{
notifyingPanel.ChildrenCreated += notifyingItem_ChildrenCreated;
}
}
OnVisualChildAdded((UIElement)item, (UIElementCollection)sender);
}
}
if (e.OldItems != null)
{
foreach (var item in e.OldItems)
{
INotifyingPanel notifyingPanel = item as INotifyingPanel;
if (notifyingPanel != null)
{
notifyingPanel.ChildrenCreated -= notifyingItem_ChildrenCreated;
if (notifyingPanel.NotifyingChildren != null)
{
notifyingPanel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
}
}
OnVisualChildRemoved((UIElement)item, (UIElementCollection)sender);
}
}
}
private void notifyingItem_ChildrenCreated(object sender, EventArgs e)
{
INotifyingPanel panel = (INotifyingPanel)sender;
SubscribePanelEvents(panel);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
addedVisualElements.Clear();
foreach (var item in GetAllPanels())
{
INotifyingPanel panel = item as INotifyingPanel;
if (panel != null)
{
panel.ChildrenCreated -= notifyingItem_ChildrenCreated;
if (panel.NotifyingChildren != null)
{
panel.NotifyingChildren.CollectionChanged -= OnVisualCollectionChanged;
}
}
}
var headerPanel = GetPart <StackPanel>("PART_HeaderPanel");
MigrateChildren(this.headerPanel, headerPanel);
this.headerPanel = headerPanel;
var footerPanel = GetPart <StackPanel>("PART_FooterPanel");
MigrateChildren(this.footerPanel, footerPanel);
this.footerPanel = footerPanel;
var leftPanel = GetPart <StackPanel>("PART_LeftPanel");
MigrateChildren(this.leftPanel, leftPanel);
this.leftPanel = leftPanel;
var bottomPanel = GetPart <StackPanel>("PART_BottomPanel");
MigrateChildren(this.bottomPanel, bottomPanel);
this.bottomPanel = bottomPanel;
var rightPanel = GetPart <StackPanel>("PART_RightPanel");
MigrateChildren(this.rightPanel, rightPanel);
this.rightPanel = rightPanel;
var topPanel = GetPart <StackPanel>("PART_TopPanel");
MigrateChildren(this.topPanel, topPanel);
this.topPanel = topPanel;
var mainCanvas = GetPart <Canvas>("PART_MainCanvas");
MigrateChildren(this.mainCanvas, mainCanvas);
this.mainCanvas = mainCanvas;
var centralGrid = GetPart <Grid>("PART_CentralGrid");
MigrateChildren(this.centralGrid, centralGrid);
this.centralGrid = centralGrid;
centralGridColumn = GetPart <ColumnDefinition>("PART_CentralGridColumn");
leftAxisColumn = GetPart <ColumnDefinition>("PART_LeftAxisColumn");
rightAxisColumn = GetPart <ColumnDefinition>("PART_RightAxisColumn");
var mainGrid = GetPart <Grid>("PART_MainGrid");
MigrateChildren(this.mainGrid, mainGrid);
this.mainGrid = mainGrid;
var parallelCanvas = GetPart <Canvas>("PART_ParallelCanvas");
MigrateChildren(this.parallelCanvas, parallelCanvas);
this.parallelCanvas = parallelCanvas;
var contentsGrid = GetPart <Grid>("PART_ContentsGrid");
MigrateChildren(this.contentsGrid, contentsGrid);
this.contentsGrid = contentsGrid;
Content = contentsGrid;
AddLogicalChild(contentsGrid);
foreach (var notifyingItem in GetAllPanels())
{
INotifyingPanel panel = notifyingItem as INotifyingPanel;
if (panel != null)
{
if (panel.NotifyingChildren == null)
{
panel.ChildrenCreated += notifyingItem_ChildrenCreated;
}
else
{
panel.NotifyingChildren.CollectionChanged += OnVisualCollectionChanged;
}
}
}
}
