private static Panel LoadPanelTemplate(ItemsPanelTemplate panelTemplate)
{
var panel = (Panel)panelTemplate.LoadContent();
panel.IsItemsHost = false; //set by ItemPanelTemplate, we need to reset it
return(panel);
}
protected override void OnItemsPanelChanged(ItemsPanelTemplate oldItemsPanel, ItemsPanelTemplate newItemsPanel)
{
// This is not the actual WrappableStackPanel that will be used as the ItemsPanel.
// This is another instance, and I use the field only for existence, not reference.
isWrappableStackPanel = (newItemsPanel.LoadContent() as WrappableStackPanel) != null;
base.OnItemsPanelChanged(oldItemsPanel, newItemsPanel);
}
private static CodeExpression GetItemsPanelTemplateValueExpression(CodeTypeDeclaration parentClass, CodeMemberMethod method, object value, string baseName)
{
ItemsPanelTemplate template = value as ItemsPanelTemplate;
DependencyObject content = template.LoadContent();
string variableName = baseName + "_ipt";
string creator = CodeComHelper.GenerateTemplate(parentClass, method, content, variableName);
CodeVariableDeclarationStatement templateVar = new CodeVariableDeclarationStatement(
"ControlTemplate", variableName,
new CodeObjectCreateExpression("ControlTemplate", new CodeSnippetExpression(creator)));
method.Statements.Add(templateVar);
return(new CodeVariableReferenceExpression(variableName));
}
public void ApplyTemplate(ItemsPanelTemplate template)
{
DetachScrolling();
FrameworkElement content = template.LoadContent() as FrameworkElement;
FrameworkElement oldTemplateControl = TemplateControl;
if (oldTemplateControl != null)
oldTemplateControl.CleanupAndDispose();
TemplateControl = content;
if (content == null)
_itemsHostPanel = null;
else
{
content.LogicalParent = this;
_itemsHostPanel = content.FindElement(ItemsHostMatcher.Instance) as Panel;
}
AttachScrolling();
}