public virtual void Handle(GoBackPageNavigationRequest message)
{
// Remove the top frame
if (message.ToPage == null)
{
StackedFrame.GoBack();
}
else
{
// ReSharper disable once PossibleUnintendedReferenceComparison
while (StackedFrame.TopFrame != null && StackedFrame.TopFrame.Content != message.ToPage)
{
StackedFrame.GoBack();
}
}
StackedFrame.EnableTop();
}
/// <summary>
/// Used to navigate to a new Frame, e.g. add a frame with a new page
/// </summary>
public Page?AddPage(Page page, Page?basePage = null, bool isResizable = true, bool isModal = true)
{
// if a base frame is set, go back to it
if (basePage != null)
{
EventAggregator.PublishMessage(new GoBackPageNavigationRequest(basePage));
}
// Check if the frame is already created
var frameKey = StackedFrameExtension.GetFrameKey(page);
if (StackedFrame.Contains(frameKey))
{
return(null);
}
// Hide the current property panel
HidePropertyPanel();
// if the page is modal, than disable the previous one
if (isModal)
{
StackedFrame.DisableTop();
}
if (StackedMode == StackedMode.FullWidth && isResizable && StackedFrame.TopFrame != null)
{
StackedFrame.AddSplitter();
}
// add the new page
var frame = CreateFrame();
StackedFrame.AddFrame(EventAggregator, frame, page);
if (StackedMode == StackedMode.Resizeable && isResizable)
{
StackedFrame.AddSplitter();
}
return(page);
}