Hi Quan,
1. You can just cast the RadPageViewItem to RadPageViewExplorerBarItem. When you are in explorer bar view, this cast will pass and you will have access to the IsExpanded property:
2. In regards to the animation, RadPageView does not feature expand animation, however, you could use a timer and the PageLength property to achieve such. Here is an example:
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
AddPageView();
radPageView1.ViewMode = PageViewMode.ExplorerBar;
RadPageViewExplorerBarElement explorerBarElement = radPageView1.ViewElement as RadPageViewExplorerBarElement;
foreach (RadPageViewExplorerBarItem item in explorerBarElement.Items)
{
item.MouseHover += item_MouseHover;
item.AssociatedContentAreaElement.RadPropertyChanging += AssociatedContentAreaElement_RadPropertyChanging;
}
timer = new System.Windows.Forms.Timer();
timer.Interval =30;
timer.Tick += timer_Tick;
radPageView1.PageExpanded += radPageView1_PageExpanded;
}
void timer_Tick(object sender, EventArgs e)
{
currentPage.PageLength += 20;
if (currentPage.PageLength >= 300)
{
timer.Stop();
}
}
System.Windows.Forms.Timer timer;
RadPageViewPage currentPage;
void radPageView1_PageExpanded(object sender, RadPageViewEventArgs e)
{
timer.Stop();
currentPage = e.Page;
currentPage.PageLength = 0;
timer.Start();
}
void AssociatedContentAreaElement_RadPropertyChanging(object sender, RadPropertyChangingEventArgs args)
{
if (args.Property.Name == "Bounds")
{
//suspend layout when animating
args.Cancel = timer.Enabled;
}
}
void item_MouseHover(object sender, EventArgs e)
{
RadPageViewExplorerBarItem item = (RadPageViewExplorerBarItem)sender;
RadPageViewExplorerBarElement explorerBarElement = radPageView1.ViewElement as RadPageViewExplorerBarElement;
foreach (RadPageViewExplorerBarItem i in explorerBarElement.Items)
{
i.IsExpanded = false;
}
item.IsExpanded = true;
}
I hope that you find this information useful.
Regards,
Stefan
Telerik
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