1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
using Android.App;
using Android.Content;
using Fragment = Android.Support.V4.App.Fragment;
using FragmentManager = Android.Support.V4.App.FragmentManager;
using FragmentTransaction = Android.Support.V4.App.FragmentTransaction;
namespace Xamarin.Forms.Platform.Android.AppCompat
{
internal class MasterDetailContainer : Xamarin.Forms.Platform.Android.MasterDetailContainer, IManageFragments
{
PageContainer _pageContainer;
FragmentManager _fragmentManager;
readonly bool _isMaster;
readonly MasterDetailPage _parent;
public MasterDetailContainer(MasterDetailPage parent, bool isMaster, Context context) : base(parent, isMaster, context)
{
Id = FormsAppCompatActivity.GetUniqueId();
_parent = parent;
_isMaster = isMaster;
}
FragmentManager FragmentManager => _fragmentManager ?? (_fragmentManager = ((FormsAppCompatActivity)Context).SupportFragmentManager);
protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
base.OnLayout(changed, l, t, r, b);
// If we're using a PageContainer (i.e., we've wrapped our contents in a Fragment),
// Make sure that it gets laid out
if (_pageContainer != null)
{
if (_isMaster)
{
var width = (int)Context.ToPixels(_parent.MasterBounds.Width);
// When the base class computes the size of the Master container, it starts at the top of the
// screen and adds padding (_parent.MasterBounds.Top) to leave room for the status bar
// When this container is laid out, it's already starting from the adjusted y value of the parent,
// so we subtract _parent.MasterBounds.Top from our starting point (to get 0) and add it to the
// bottom (so the master page stretches to the bottom of the screen)
var height = (int)Context.ToPixels(_parent.MasterBounds.Height + _parent.MasterBounds.Top);
_pageContainer.Layout(0, 0, width, height);
}
else
{
_pageContainer.Layout(l, t, r, b);
}
_pageContainer.Child.UpdateLayout();
}
}
protected override void AddChildView(VisualElement childView)
{
_pageContainer = null;
Page page = childView as NavigationPage ?? (Page)(childView as TabbedPage);
if (page == null)
{
// Not a NavigationPage or TabbedPage? Just do the normal thing
base.AddChildView(childView);
}
else
{
// The renderers for NavigationPage and TabbedPage both host fragments, so they need to be wrapped in a
// FragmentContainer in order to get isolated fragment management
Fragment fragment = FragmentContainer.CreateInstance(page);
var fc = fragment as FragmentContainer;
fc?.SetOnCreateCallback(pc =>
{
_pageContainer = pc;
SetDefaultBackgroundColor(pc.Child);
});
FragmentTransaction transaction = FragmentManager.BeginTransaction();
transaction.DisallowAddToBackStack();
transaction.Add(Id, fragment);
transaction.SetTransition((int)FragmentTransit.FragmentOpen);
transaction.Commit();
}
}
public void SetFragmentManager(FragmentManager fragmentManager)
{
if (_fragmentManager == null)
_fragmentManager = fragmentManager;
}
}
}
|
