private void ChangeTabVisibleCore()
{
RadRibbonBarElement parent = this.Owner.Parent as RadRibbonBarElement;
if (parent == null)
{
return;
}
parent.SuspendPropertyNotifications();
parent.ElementTree.RootElement.SuspendLayout();
bool expanded = parent.Expanded;
parent.Expanded = true;
CommandTabEventArgs args = new CommandTabEventArgs(this);
parent.CallOnCommandTabCollapsed(args);
parent.VisibleChangedCore();
parent.Expanded = expanded;
parent.ElementTree.RootElement.ResumeLayout(false);
parent.ResumePropertyNotifications();
}
protected override void OnPropertyChanging(RadPropertyChangingEventArgs e)
{
base.OnPropertyChanging(e);
if (e.Property == RadItem.VisibilityProperty &&
((ElementVisibility)e.NewValue) == ElementVisibility.Collapsed)
{
int indexOfCurrentTab = this.Owner.Items.IndexOf(this);
bool selectedTabChanged = false;
for (int i = indexOfCurrentTab + 1; i < this.Owner.Items.Count; i++)
{
RadPageViewItem currentItem = this.Owner.Items[i] as RadPageViewItem;
if (currentItem.Visibility == ElementVisibility.Visible)
{
this.Owner.SelectedItem = currentItem;
selectedTabChanged = true;
break;
}
}
if (!selectedTabChanged)
{
for (int i = indexOfCurrentTab - 1; i > -1; i--)
{
RadPageViewItem currentItem = this.Owner.Items[i] as RadPageViewItem;
if (currentItem.Visibility == ElementVisibility.Visible)
{
this.Owner.SelectedItem = currentItem;
selectedTabChanged = true;
break;
}
}
}
e.Cancel = !selectedTabChanged;
if (!e.Cancel)
{
RadRibbonBarElement ribbonBar = this.Owner.Parent as RadRibbonBarElement;
if (ribbonBar != null)
{
CommandTabEventArgs args = new CommandTabEventArgs(this);
ribbonBar.CallOnCommandTabCollapsed(args);
}
}
this.Owner.InvalidateMeasure();
this.Owner.InvalidateArrange();
this.Owner.UpdateLayout();
}
else if (e.Property == RadItem.VisibilityProperty &&
((ElementVisibility)e.NewValue) == ElementVisibility.Visible)
{
RadRibbonBarElement ribbonBar = this.Owner.Parent as RadRibbonBarElement;
if (ribbonBar != null)
{
CommandTabEventArgs args = new CommandTabEventArgs(this);
ribbonBar.CallOnCommandTabExpanded(args);
ribbonBar.TabStripElement.SelectedItem = this;
}
}
}