public virtual void AddChild(XF.Element child, int physicalSiblingIndex)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
XF.ShellSection sectionToAdd = child switch
{
XF.TemplatedPage childAsTemplatedPage => childAsTemplatedPage, // Implicit conversion
XF.ShellContent childAsShellContent => childAsShellContent, // Implicit conversion
XF.ShellSection childAsShellSection => childAsShellSection,
_ => throw new NotSupportedException($"Handler of type '{GetType().FullName}' representing element type '{TargetElement?.GetType().FullName ?? "<null>"}' doesn't support adding a child (child type is '{child.GetType().FullName}').")
};
if (ShellItemControl.Items.Count >= physicalSiblingIndex)
{
ShellItemControl.Items.Insert(physicalSiblingIndex, sectionToAdd);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but ShellItemControl.Items.Count={ShellItemControl.Items.Count}");
ShellItemControl.Items.Add(sectionToAdd);
}
}
private XF.ShellContent GetContentForChild(XF.Element child)
{
return(child switch
{
XF.TemplatedPage childAsTemplatedPage => GetContentForTemplatePage(childAsTemplatedPage),
XF.ShellContent childAsShellContent => childAsShellContent,
_ => null
});
private XF.ShellSection GetSectionForElement(XF.Element child)
{
return(child switch
{
XF.TemplatedPage childAsTemplatedPage => GetSectionForTemplatedPage(childAsTemplatedPage),
XF.ShellContent childAsShellContent => GetSectionForContent(childAsShellContent),
XF.ShellSection childAsShellSection => childAsShellSection,
_ => null
});
private XF.ShellItem GetItemForElement(XF.Element child)
{
return(child switch
{
XF.TemplatedPage childAsTemplatedPage => GetItemForTemplatedPage(childAsTemplatedPage),
XF.ShellContent childAsShellContent => GetItemForContent(childAsShellContent),
XF.ShellSection childAsShellSection => GetItemForSection(childAsShellSection),
XF.MenuItem childAsMenuItem => GetItemForMenuItem(childAsMenuItem),
XF.ShellItem childAsShellItem => childAsShellItem,
_ => null
});
public virtual void RemoveChild(XF.Element child)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
XF.ShellContent contentToRemove = child switch
{
XF.TemplatedPage childAsTemplatedPage => GetContentForTemplatePage(childAsTemplatedPage),
XF.ShellContent childAsShellContent => childAsShellContent,
_ => throw new NotSupportedException($"Handler of type '{GetType().FullName}' representing element type '{TargetElement?.GetType().FullName ?? "<null>"}' doesn't support removing a child (child type is '{child.GetType().FullName}').")
};
ShellSectionControl.Items.Remove(contentToRemove);
}
public TemplatedPageHandler(NativeComponentRenderer renderer, XF.TemplatedPage templatedPageControl) : base(renderer, templatedPageControl)
{
TemplatedPageControl = templatedPageControl ?? throw new ArgumentNullException(nameof(templatedPageControl));
Initialize(renderer);
}
private XF.ShellContent GetContentForTemplatePage(XF.TemplatedPage childAsTemplatedPage)
{
return(ShellSectionControl.Items.FirstOrDefault(content => content.Content == childAsTemplatedPage));
}
private XF.ShellSection GetSectionForTemplatedPage(XF.TemplatedPage templatedPage)
{
return(ShellItemControl.Items
.FirstOrDefault(section => section.Items.Any(contect => contect.Content == templatedPage)));
}
private XF.ShellItem GetItemForTemplatedPage(XF.TemplatedPage childAsTemplatedPage)
{
return(ShellControl.Items
.FirstOrDefault(item => item.Items
.Any(section => section.Items.Any(content => content.Content == childAsTemplatedPage))));
}
