protected virtual void OnElementChanged(VisualElementChangedEventArgs e)
{
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= HandlePropertyChanged;
}
if (e.NewElement != null)
{
e.NewElement.PropertyChanged += HandlePropertyChanged;
}
if (UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.LandscapeLeft || UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.LandscapeRight)
{
PreferredDisplayMode = UISplitViewControllerDisplayMode.AllVisible;
}
else if (UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.Portrait || UIDevice.CurrentDevice.Orientation == UIDeviceOrientation.PortraitUpsideDown)
{
PreferredDisplayMode = UISplitViewControllerDisplayMode.PrimaryOverlay;
}
MasterWidth = 400;
MasterDetailPage.Master.WidthRequest = 400;
MasterDetailPage.UpdateMasterBehavior();
var changed = ElementChanged;
if (changed != null)
{
changed(this, e);
}
UpdateControllers();
}
public override void WillRotate(UIInterfaceOrientation toInterfaceOrientation, double duration)
{
// On IOS8 the MasterViewController ViewAppear/Disappear weren't being called correctly after rotation
// We now close the Master by using the new SplitView API, basicly we set it to hidden and right back to the Normal/AutomaticMode
if (!MasterDetailPage.ShouldShowSplitMode && _masterVisible)
{
MasterDetailPage.CanChangeIsPresented = true;
PreferredDisplayMode = UISplitViewControllerDisplayMode.PrimaryHidden;
PreferredDisplayMode = UISplitViewControllerDisplayMode.Automatic;
}
MasterDetailPage.UpdateMasterBehavior();
MessagingCenter.Send <IVisualElementRenderer>(this, NavigationRenderer.UpdateToolbarButtons);
base.WillRotate(toInterfaceOrientation, duration);
}
void UpdateMasterBehavior(CGSize newBounds)
{
MasterDetailPage masterDetailPage = _masterDetailPage ?? Element as MasterDetailPage;
if (masterDetailPage == null)
{
return;
}
bool isPortrait = newBounds.Height > newBounds.Width;
var previous = PreferredDisplayMode;
switch (masterDetailPage.MasterBehavior)
{
case MasterBehavior.Split:
PreferredDisplayMode = UISplitViewControllerDisplayMode.AllVisible;
break;
case MasterBehavior.Popover:
PreferredDisplayMode = UISplitViewControllerDisplayMode.PrimaryHidden;
break;
case MasterBehavior.SplitOnPortrait:
PreferredDisplayMode = (isPortrait) ? UISplitViewControllerDisplayMode.AllVisible : UISplitViewControllerDisplayMode.PrimaryHidden;
break;
case MasterBehavior.SplitOnLandscape:
PreferredDisplayMode = (!isPortrait) ? UISplitViewControllerDisplayMode.AllVisible : UISplitViewControllerDisplayMode.PrimaryHidden;
break;
default:
PreferredDisplayMode = UISplitViewControllerDisplayMode.Automatic;
break;
}
if (previous == PreferredDisplayMode)
{
return;
}
if (!MasterDetailPage.ShouldShowSplitMode)
{
MasterDetailPage.CanChangeIsPresented = true;
}
MasterDetailPage.UpdateMasterBehavior();
}
public override void WillRotate(UIInterfaceOrientation toInterfaceOrientation, double duration)
{
// I tested this code on iOS9+ and it's never called
if (!System.Maui.Maui.IsiOS9OrNewer)
{
if (!MasterDetailPage.ShouldShowSplitMode && IsMasterVisible)
{
MasterDetailPage.CanChangeIsPresented = true;
PreferredDisplayMode = UISplitViewControllerDisplayMode.PrimaryHidden;
PreferredDisplayMode = UISplitViewControllerDisplayMode.Automatic;
}
MasterDetailPage.UpdateMasterBehavior();
MessagingCenter.Send <IVisualElementRenderer>(this, NavigationRenderer.UpdateToolbarButtons);
}
base.WillRotate(toInterfaceOrientation, duration);
}
