internal virtual bool Navigator(FT800Device dc)
{
if (this._nextIndex == this._currentIndex)
{
return(false);
}
bool proceed = true;
if (this._currentIndex >= 0)
{
var args = new NavigationLeaveArgs();
args.GoingBack = this._nextIndex < this._currentIndex;
((Page)this.Content).InvokeBeforeLeave(dc, args);
if (args.Cancel)
{
proceed = false;
}
}
if (proceed)
{
if (this._nextIndex > this._currentIndex)
{
int len = this._navigationStack.Length;
if (this._nextPageGen != null)
{
if (this._nextIndex >= len)
{
var array = new PageCreationDelegate[len + 4];
this._navigationStack.CopyTo(array, 0);
this._navigationStack = array;
}
this._navigationStack[++this._currentIndex] = this._nextPageGen;
}
else if (this._nextIndex < len)
{
this._currentIndex = this._nextIndex;
}
}
else
{
this._currentIndex = this._nextIndex;
}
Page current;
this.Content = current = this._navigationStack[this._currentIndex]();
current.InvokeEnter(dc);
current.Invalidate(true);
this._nextPageGen = null;
}
return(proceed);
}
internal void InvokeBeforeLeave(FT800Device dc, NavigationLeaveArgs args)
{
this.OnBeforeLeave(dc, args);
}
protected virtual void OnBeforeLeave(FT800Device dc, NavigationLeaveArgs args)
{
}