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Switch to reusing renderers on Forms elements

This commit is contained in:
Frank A. Krueger 2017-11-10 10:14:28 -08:00
parent 5575578c2d
commit 4a51859da1
3 changed files with 21 additions and 5 deletions
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12
Ooui.Forms/PageExtensions.cs
View File

@ -16,16 +16,24 @@ namespace Xamarin.Forms
Ooui.UI.Publish (path, () => lazyPage.Value);
}
public static Ooui.Element CreateElement (this Xamarin.Forms.Page page)
public static Ooui.Element GetOouiElement (this Xamarin.Forms.Page page)
{
if (!Xamarin.Forms.Forms.IsInitialized)
throw new InvalidOperationException ("call Forms.Init() before this");
var existingRenderer = Ooui.Forms.Platform.GetRenderer (page);
if (existingRenderer != null)
return existingRenderer.NativeView;
return CreateElement (page);
}
static Ooui.Element CreateElement (this Xamarin.Forms.Page page)
{
if (!(page.RealParent is Application)) {
var app = new DefaultApplication ();
app.MainPage = page;
}
var result = new Ooui.Forms.Platform ();
result.SetPage (page);
return result.Element;

10
Samples/BoxViewClockSample.cs
View File

@ -7,9 +7,17 @@ namespace Samples
{
public string Title => "Xamarin.Forms BoxViewClock";
BoxViewClockPage page;
public Ooui.Element CreateElement ()
{
return new BoxViewClockPage ().CreateElement ();
//
// Always return the same page because the code never stops the timer
// and we don't want to create an unlimited number of them.
//
if (page == null)
page = new BoxViewClockPage ();
return page.GetOouiElement ();
}
class BoxViewClockPage : ContentPage

4
Samples/XamarinFormsSample.cs
View File

@ -44,12 +44,12 @@ namespace Samples
var page = MakePage ();
page.Publish ("/xamarin-forms-shared");
Ooui.UI.Publish ("/xamarin-forms", () => MakePage ().CreateElement ());
Ooui.UI.Publish ("/xamarin-forms", () => MakePage ().GetOouiElement ());
}
public Ooui.Element CreateElement ()
{
return MakePage ().CreateElement ();
return MakePage ().GetOouiElement ();
}
}
}