/// <summary>
/// Overriden. Verifies certain properties.
/// </summary>
/// <param name="e">An EventArgs object that contains the event data.</param>
protected override void OnLoad(EventArgs e)
{
if ((Page != null) && !Page.IsPostBack)
{
if ((TargetID != String.Empty) && (Target == null))
{
// TargetID cannot be found
throw new Exception(GetStringResource("TabStripInvalidTargetID"));
}
foreach (TabItem item in Items)
{
if (item is Tab)
{
Tab tab = (Tab)item;
PageView target = tab.Target;
if ((tab.TargetID != String.Empty) && (target == null))
{
// TargetID cannot be found
throw new Exception(GetStringResource("TabInvalidTargetID"));
}
}
}
SetTargetSelectedIndex();
}
base.OnLoad(e);
}
/// <summary>
/// Activates the targetted PageView within a MultiPage control.
/// </summary>
private void SetTargetSelectedIndex()
{
int arrayIndex = Items.ToArrayIndex(SelectedIndex);
if (arrayIndex >= 0)
{
Tab tab = (Tab)Items[arrayIndex];
MultiPage multiPage = Target;
if (multiPage != null)
{
PageView page = (tab == null) ? null : tab.Target;
if ((page != null) && !page.Selected)
{
if (_OldMultiPageIndex < 0)
{
_OldMultiPageIndex = multiPage.SelectedIndex;
}
// Activate the PageView
page.Activate();
}
}
}
}
/// <summary>
/// The rendering path for downlevel browsers.
/// </summary>
/// <param name="writer">The output stream that renders HTML content to the client.</param>
protected override void RenderDownLevelPath(HtmlTextWriter writer)
{
if (Width == Unit.Empty)
{
Width = Unit.Percentage(100);
}
AddAttributesToRender(writer);
string padding = Util.ExtractNumberString(Style["padding"]);
if (padding != String.Empty)
{
writer.AddAttribute(HtmlTextWriterAttribute.Cellpadding, padding);
}
writer.RenderBeginTag(HtmlTextWriterTag.Table);
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
// Only render the page that is visible
PageView page = SelectedPage;
if (page != null)
{
page.RenderControl(writer);
}
// base.RenderDownLevelPath(writer);
writer.RenderEndTag();
writer.RenderEndTag();
}
/// <summary>
/// The rendering path for visual designers.
/// </summary>
/// <param name="writer">The output stream that renders HTML content to the client.</param>
protected override void RenderDesignerPath(HtmlTextWriter writer)
{
if (Width == Unit.Empty)
{
Width = Unit.Percentage(100);
}
AddAttributesToRender(writer);
writer.RenderBeginTag(HtmlTextWriterTag.Div);
// Only render the page that is visible
PageView page = SelectedPage;
if (page != null)
{
page.RenderControl(writer);
}
writer.RenderEndTag();
}