protected virtual void OnCollectionChanging(CollectionChangingEventArgs <T> e)
{
var handler = CollectionChanging;
if (handler != null)
{
var subscriptions = handler.GetInvocationList();
int index = 0;
try {
for (; index < subscriptions.Length; index++)
{
((EventHandler <CollectionChangingEventArgs <T> >)subscriptions[index])(this, e);
if (e.Cancel)
{
break;
}
}
} catch (Exception) {
e.Cancel = true;
}
}
if (e.Cancel)
{
OnCollectionChangingCancelled(EventArgs.Empty);
}
}
void OnTabCollectionRemoving(object sender, CollectionChangingEventArgs e)
{
if (PageRemoving != null)
{
PageRemoving(sender, e);
}
}
void controlPanel_PageRemoving(object sender, CollectionChangingEventArgs args)
{
if (PageRemoving != null)
{
PageRemoving(sender, args);
}
}
private bool OnCollectionChanging(CollectionChangeAction action, T item)
{
var eventArgs = new CollectionChangingEventArgs <T>(action, item);
CollectionChanging(this, eventArgs);
return(eventArgs.Cancel);
}
protected void OnCategoryInserted(Object o, CollectionChangingEventArgs e)
{
ButtonsPanel panel = (ButtonsPanel)e.Value;
panel.Clicked += OnSelectionChanged;
panel.Dock = DockStyle.Top;
Controls.Add((ButtonsPanel)e.Value);
panel.BringToFront();
}
protected void OnTabCollectionRemoved(Object o, CollectionChangingEventArgs e)
{
Controls.Remove((Page)e.Value);
if (e.Index <= selectedPage)
{
SelectedPage = SelectedPage - 1;
}
Refresh();
}
protected void OnCategoryInserted(Object o, CollectionChangingEventArgs e)
{
Panel clientPanel = new Panel();
clientPanel.Dock = DockStyle.Fill;
FloatPanel panel = (FloatPanel)e.Value;
panel.Dock = DockStyle.Top;
Controls.Add((FloatPanel)e.Value);
panel.BringToFront();
}
protected void OnTabCollectionInserted(Object o, CollectionChangingEventArgs e)
{
Page page = (Page)e.Value;
page.Dock = DockStyle.Fill;
page.ActiveColor = ActiveColor;
page.DrawBorder = drawBorder;
Parent.Controls.Add((Page)e.Value);
SelectedPage = Pages.Count - 1;
page.BringToFront();
ShowHideCloseButton();
}
private void ManagedJobInfo_CollectionChanging(object sender, CollectionChangingEventArgs e)
{
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add)
{
lock (this.ManagedJobInfo)
{
if (this.ManagedJobInfo.Any(t => t.JobId == ((JobInfo)e.NewItems[0]).JobId))
{
//擲例外 or 取消加入
e.Cancel = true;
}
}
}
}
private void Entities_CollectionChanging(object sender, CollectionChangingEventArgs <TEntityViewModel> e)
{
switch (e.Action)
{
case CollectionChangeAction.Remove:
string cantRemoveError;
if (!IsCanRemove(e.Item, out cantRemoveError))
{
_MessageService.ShowMessage(cantRemoveError, "Ошибка", image: MessageBoxImage.Error);
e.Cancel = true;
}
else
{
RemoveEntityFromDatabase(e.Item.DbEntity);
}
break;
}
}
private static void Assemblies_InsertingItem(object sender, CollectionChangingEventArgs<AssemblyDefinition> e)
{
if (e.TargetObject.Compilation != null)
{
e.Cancel = true;
throw new InvalidOperationException("Assembly reference is already added to another compilation.");
}
}
private void _toolWindows_InsertingItem(object sender, CollectionChangingEventArgs e)
{
e.Cancel = DockPanel.GetContainer(e.TargetObject as LiteViewContent) != null;
}
protected void OnCategoryRemoved(Object o, CollectionChangingEventArgs e)
{
Controls.Remove((ButtonsPanel)e.Value);
}
private void _toolWindows_InsertingItem(object sender, CollectionChangingEventArgs e)
{
e.Cancel = DockPanel.GetContainer(e.TargetObject as LiteViewContent) != null;
}
private static void SourceFilesOnInsertingItem(object sender, CollectionChangingEventArgs<SourceFile> e)
{
if (e.TargetObject.Assembly != null)
{
e.Cancel = true;
throw new InvalidOperationException("Source file is already added to another assembly.");
}
}
private bool TryPassChangingChecks(CollectionChangingEventArgs <T> e)
{
OnCollectionChanging(e);
return(!e.Cancel);
}
protected void OnButtonRemoved(Object o, CollectionChangingEventArgs e)
{
StateChanged();
}