/// <summary>
/// Gets the initial collection of webpart panels.
/// </summary>
/// <returns></returns>
protected internal virtual WebPartPanelCollection GetInitialWebPartPanels()
{
WebPartPanelCollection panels = new WebPartPanelCollection();
if (this.zoneTemplate != null)
{
// Create the control which contains the template.
NonParentingControl templatedControl = new NonParentingControl();
this.zoneTemplate.InstantiateIn(templatedControl);
// Don't do anything with an empty template.
if (!templatedControl.HasControls())
{
return(panels);
}
WebPartPanel panel;
int zoneIndexCounter = 0;
foreach (Control childControl in templatedControl.Controls)
{
panel = this.CreateWebPartPanel(childControl);
if (panel != null)
{
panel.ZoneIndex = (zoneIndexCounter++);
panels.Add(panel);
}
}
}
return(panels);
}
/// <summary>
/// Adds the webpart panels in the specified zone to the current collection.
/// </summary>
/// <param name="zone"></param>
internal void AddWebPartPanelsFromZone(WebPartZone zone)
{
WebPartPanelCollection panels = zone.GetInitialWebPartPanels();
foreach (WebPartPanel panel in panels)
{
base.Add(panel);
}
}
/// <summary>
/// Moves a webpart panel to the specified zone at the specified index.
/// </summary>
/// <param name="panel"></param>
/// <param name="zone"></param>
/// <param name="zoneIndex"></param>
public void MoveWebPartPanel(WebPartPanel panel, WebPartZone zone, int zoneIndex)
{
WebPartPanelCollection panels = zone.WebPartPanels;
if (zoneIndex < 0)
{
throw new ArgumentOutOfRangeException("zoneIndex");
}
// Update the indices of the webpart panels which are placed beneath the moved panel.
for (int i = zoneIndex; i < panels.Count; i++)
{
panels[i].ZoneIndex++;
}
panel.ZoneID = zone.ID;
panel.ZoneIndex = zoneIndex;
}
/// <summary>
/// Gets the webparts for the specified zone.
/// </summary>
/// <param name="zone"></param>
/// <returns></returns>
internal WebPartPanelCollection GetWebPartsForZone(WebPartZone zone)
{
WebPartPanelCollection panels = new WebPartPanelCollection();
// Get the webpart panel's in the zone sorted by the the zone index.
SortedList <WebPartPanel, object> sortedPanels = new SortedList <WebPartPanel, object>(new WebPartManager.WebPartPanelZoneIndexComparer());
foreach (WebPartPanel panel in this.Controls)
{
if (panel.ZoneID == zone.ID && !panel.IsRemoved)
{
sortedPanels.Add(panel, null);
}
}
// Re-organize the zone indices, starting from 0.
for (int i = 0; i < sortedPanels.Keys.Count; i++)
{
sortedPanels.Keys[i].ZoneIndex = i;
panels.Add(sortedPanels.Keys[i]);
}
return(panels);
}
/// <summary>
/// Renders the child controls.
/// </summary>
/// <param name="writer"></param>
protected override void RenderChildren(HtmlTextWriter writer)
{
WebPartPanelRenderer renderer = this.CreateWebPartPanelRenderer();
if (renderer == null)
{
throw new InvalidOperationException("No webpart panel renderer specified.");
}
WebPartPanelCollection panels = this.WebPartPanels;
bool supportsClientDragDrop = WebPartManager.SupportsClientSideDragDrop(this.Page);
bool horizontal = (this.orientation == Orientation.Horizontal);
if (horizontal)
{
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
}
// Render the panels.
foreach (WebPartPanel panel in panels)
{
if (!horizontal)
{
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
}
writer.AddAttribute(HtmlTextWriterAttribute.Id, panel.ContainerClientID);
writer.AddAttribute("relatedWebPart", panel.ClientID);
if (supportsClientDragDrop)
{
writer.AddAttribute("orientation", this.Orientation.ToString());
writer.AddAttribute("ondragenter", "MoveWebPartDragEnter(this);");
writer.AddAttribute("ondragend", "MoveWebPart(this, dropLocation);");
writer.AddAttribute("ondragover", "MoveWebPartDragOver(this, true);");
}
writer.RenderBeginTag(HtmlTextWriterTag.Td);
renderer.RenderWebPartPanel(writer, panel);
writer.RenderEndTag();
if (!horizontal)
{
writer.RenderEndTag();
}
}
if (!horizontal)
{
writer.RenderBeginTag(HtmlTextWriterTag.Tr);
}
// Render the control which will be displayed when there are no panels in the zone.
if (WebPartManager.SupportsClientSideDragDrop(this.Page))
{
writer.AddAttribute("ondragenter", "MoveWebPartDragEnter(this);");
writer.AddAttribute("ondragover", "MoveWebPartDragOver(this, 'False');");
writer.AddAttribute("orientation", this.Orientation.ToString());
}
writer.RenderBeginTag(HtmlTextWriterTag.Td);
// Render the message which will be made visible when no panels are placed inside this zone.
this.emptyZoneMessage.Attributes["name"] = "emptyWebPartZone";
this.emptyZoneMessage.Attributes["webPartsInZone"] = this.WebPartPanels.Count.ToString();
if (this.WebPartPanels.Count > 0)
{
this.emptyZoneMessage.Style.Add(HtmlTextWriterStyle.Display, "none");
}
this.emptyZoneMessage.RenderControl(writer);
writer.RenderEndTag();
writer.RenderEndTag();
}
