Bug 33369 - Unable to set value to false for the MasterDetailPage.IsPresented property
Summary: Unable to set value to false for the MasterDetailPage.IsPresented property
Status: RESOLVED FIXED
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.4.0
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2015-08-25 14:18 UTC by Anubhav Ranjan
Modified: 2016-01-25 18:45 UTC (History)
5 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Anubhav Ranjan 2015-08-25 14:18:49 UTC
Our customers are facing issues when setting up the MasterDetailPage.IsPresented = false
It doesn't seem to work.

Although, I have found similar issues like this:
https://bugzilla.xamarin.com/show_bug.cgi?id=24314
https://bugzilla.xamarin.com/show_bug.cgi?id=26309

#Code Snippet:
===========
public class CustomNavigationPage : MasterDetailPage
{
public CustomNavigationPage()
{
this.IsPresentedChanged += OnIsPresentedChanged;
}

private void OnIsPresentedChanged(object sender, EventArgs
eventArgs)
{
// TODO: This used to work!
if (IsPresented && !_allowMaster)
{
IsPresented = false;
}
}

#Sample Project:
============
https://dl.dropboxusercontent.com/u/30949500/Xamarin%20Samples/IsPresentedRepro.zip


#Description:
===========
The issue seems to be with Xamarin.Forms - as with 1.3.3.6323 it looks
fine, but updating to the latest causes the issue outlined below (I have
not checked which version this actually breaks in).

I have a button which increments a counter by 1. Each time the back button
is pressed, it decrements the counter and when 0, it should display the
master.

I think the issue is that "IsPresented" is never actually set anymore,
please see the screenshot below. I am explicitly setting the IsPresented
to false, but the debugger still shows it as true! Additionally, if you
press this any number of times, the Master always shows, and then hides
some time later.


#Version Info:
============
Microsoft Visual Studio Ultimate 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.6.00079

Installed Version: Ultimate

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ASP.NET and Web Tools   12.4.60425.0
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Xamarin Forms Player   1.0
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Comment 2 Rui Marinho 2016-01-25 18:45:02 UTC
This is fixed in in 2.0.1 with AppCompact support, make sure to use FormsAppCompatActivity and AppCompact Theme.