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conceptdevconceptdev
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10 files changed

+165
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‎GetStarted/Notes/MultiPage/Notes.Android/MainActivity.cs‎

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using Android.Views;
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using Android.Widget;
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using Android.OS;
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using Xamarin.Forms.DualScreen;
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namespace Notes.Droid
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{
@@ -19,6 +20,7 @@ protected override void OnCreate(Bundle savedInstanceState)
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base.OnCreate(savedInstanceState);
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global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
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DualScreenService.Init(this);
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LoadApplication(new App());
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}
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}

‎GetStarted/Notes/MultiPage/Notes.Android/Notes.Android.csproj‎

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<PackageReference Include="Xamarin.Forms">
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<Version>4.6.0.726</Version>
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</PackageReference>
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<PackageReference Include="Xamarin.Forms.DualScreen">
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<Version>4.6.0.726</Version>
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</PackageReference>
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</ItemGroup>
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<ItemGroup>
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<Compile Include="ItemDragAndDropEffect.cs" />

‎GetStarted/Notes/MultiPage/Notes/App.xaml.cs‎

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@@ -12,7 +12,7 @@ public App()
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{
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InitializeComponent();
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FolderPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData));
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MainPage = new NavigationPage(new NotesPage());
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MainPage = new NavigationPage(new MainPage());
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}
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protected override void OnStart()

‎GetStarted/Notes/MultiPage/Notes/MainPage.xaml‎

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<?xml version="1.0" encoding="utf-8" ?>
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<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:d="http://xamarin.com/schemas/2014/forms/design"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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mc:Ignorable="d"
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xmlns:dualScreen="clr-namespace:Xamarin.Forms.DualScreen;assembly=Xamarin.Forms.DualScreen"
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xmlns:templates="clr-namespace:Notes"
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x:Class="Notes.MainPage"
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Title="Notes">
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<ContentPage.ToolbarItems>
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<ToolbarItem Text="+"
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Clicked="OnNoteAddedClicked" />
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</ContentPage.ToolbarItems>
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<ContentPage.Content>
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<dualScreen:TwoPaneView
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x:Name="twoPaneView">
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<!--Pane 1-->
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<dualScreen:TwoPaneView.Pane1>
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<templates:NotesView />
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</dualScreen:TwoPaneView.Pane1>
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<!--Pane 2-->
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<dualScreen:TwoPaneView.Pane2>
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<templates:NoteEntryView />
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</dualScreen:TwoPaneView.Pane2>
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</dualScreen:TwoPaneView>
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</ContentPage.Content>
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</ContentPage>

‎GetStarted/Notes/MultiPage/Notes/MainPage.xaml.cs‎

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using Notes.Models;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using Xamarin.Forms;
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using Xamarin.Forms.Xaml;
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using Xamarin.Forms.DualScreen;
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namespace Notes
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{
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[XamlCompilation(XamlCompilationOptions.Compile)]
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public partial class MainPage : ContentPage
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{
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public static MainPage Current { get; private set; }
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public MainPage()
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{
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InitializeComponent();
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twoPaneView.LayoutChanged += TwoPaneView_LayoutChanged;
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Current = this;
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}
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public bool DeviceIsSpanned => DualScreenInfo.Current.SpanMode != TwoPaneViewMode.SinglePane;
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private void TwoPaneView_LayoutChanged(object sender, EventArgs e)
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{
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if (DeviceIsSpanned)
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{
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twoPaneView.WideModeConfiguration = TwoPaneViewWideModeConfiguration.LeftRight;
34+
twoPaneView.TallModeConfiguration = TwoPaneViewTallModeConfiguration.TopBottom;
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}
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else
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{ // single screen!
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twoPaneView.WideModeConfiguration = TwoPaneViewWideModeConfiguration.SinglePane;
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twoPaneView.TallModeConfiguration = TwoPaneViewTallModeConfiguration.SinglePane;
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}
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}
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void OnNoteAddedClicked(object sender, EventArgs e)
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{
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twoPaneView.Pane2.BindingContext = new Note();
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twoPaneView.PanePriority = TwoPaneViewPriority.Pane2;
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}
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protected override void OnAppearing()
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{
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base.OnAppearing();
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RefreshData();
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}
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56+
public void RefreshData()
57+
{
58+
var notes = new List<Note>();
59+
60+
var files = Directory.EnumerateFiles(App.FolderPath, "*.notes.txt");
61+
foreach (var filename in files)
62+
{
63+
notes.Add(new Note
64+
{
65+
Filename = filename,
66+
Text = File.ReadAllText(filename),
67+
Date = File.GetCreationTime(filename)
68+
});
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}
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BindingContext = notes
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.OrderBy(d => d.Date)
73+
.ToList();
74+
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twoPaneView.PanePriority = TwoPaneViewPriority.Pane1;
76+
}
77+
public void OnListViewItemSelected(Note note)
78+
{
79+
if (note != null)
80+
{
81+
twoPaneView.Pane2.BindingContext = note;
82+
twoPaneView.PanePriority = TwoPaneViewPriority.Pane2;
83+
}
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}
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protected override bool OnBackButtonPressed()
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{
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if (!DeviceIsSpanned)
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{ // single-screen
89+
if (twoPaneView.PanePriority == TwoPaneViewPriority.Pane2)
90+
{ //showing detail, back goes to master (list)
91+
twoPaneView.PanePriority = TwoPaneViewPriority.Pane1;
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return true;
93+
}
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}
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return base.OnBackButtonPressed();
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}
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}
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}

‎GetStarted/Notes/MultiPage/Notes/NoteEntryPage.xaml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
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<ContentView xmlns="http://xamarin.com/schemas/2014/forms"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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x:Class="Notes.NoteEntryPage"
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Title="Note Entry">
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x:Class="Notes.NoteEntryView"
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>
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<StackLayout Margin="20">
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<Editor Placeholder="Enter your note"
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Text="{Binding Text}"
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Clicked="OnDeleteButtonClicked"/>
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</Grid>
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</StackLayout>
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</ContentPage>
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</ContentView>

‎GetStarted/Notes/MultiPage/Notes/NoteEntryPage.xaml.cs‎

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namespace Notes
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{
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public partial class NoteEntryPage : ContentPage
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public partial class NoteEntryView : ContentView
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{
10-
public NoteEntryPage()
10+
public NoteEntryView()
1111
{
1212
InitializeComponent();
1313
}
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15-
async void OnSaveButtonClicked(object sender, EventArgs e)
15+
void OnSaveButtonClicked(object sender, EventArgs e)
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{
1717
var note = (Note)BindingContext;
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@@ -21,26 +21,27 @@ async void OnSaveButtonClicked(object sender, EventArgs e)
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// Save
2222
var filename = Path.Combine(App.FolderPath, $"{Path.GetRandomFileName()}.notes.txt");
2323
File.WriteAllText(filename, note.Text);
24+
((Note)BindingContext).Filename = filename;
2425
}
2526
else
2627
{
2728
// Update
2829
File.WriteAllText(note.Filename, note.Text);
2930
}
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31-
await Navigation.PopAsync();
32+
MainPage.Current.RefreshData();
3233
}
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34-
async void OnDeleteButtonClicked(object sender, EventArgs e)
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void OnDeleteButtonClicked(object sender, EventArgs e)
3536
{
3637
var note = (Note)BindingContext;
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3839
if (File.Exists(note.Filename))
3940
{
4041
File.Delete(note.Filename);
4142
}
42-
43-
await Navigation.PopAsync();
43+
BindingContext = new Note();
44+
MainPage.Current.RefreshData();
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}
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}
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}

‎GetStarted/Notes/MultiPage/Notes/Notes.csproj‎

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<ItemGroup>
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<PackageReference Include="Xamarin.Forms" Version="4.6.0.726" />
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<PackageReference Include="Xamarin.Forms.DualScreen" Version="4.6.0.726" />
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</ItemGroup>
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<ItemGroup>
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<Folder Include="Models\" />
1718
</ItemGroup>
19+
<ItemGroup>
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<EmbeddedResource Update="MainPage.xaml">
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<Generator>MSBuild:UpdateDesignTimeXaml</Generator>
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</EmbeddedResource>
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</ItemGroup>
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</Project>

‎GetStarted/Notes/MultiPage/Notes/NotesPage.xaml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
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<ContentView xmlns="http://xamarin.com/schemas/2014/forms"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
4-
x:Class="Notes.NotesPage"
4+
x:Class="Notes.NotesView"
55
xmlns:effects="clr-namespace:Notes"
6-
Title="Notes">
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<ContentPage.ToolbarItems>
8-
<ToolbarItem Text="+"
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Clicked="OnNoteAddedClicked" />
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</ContentPage.ToolbarItems>
6+
>
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<ListView x:Name="listView"
129
Margin="20"
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ItemsSource="{Binding .}"
1311
ItemSelected="OnListViewItemSelected">
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<ListView.Effects>
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<effects:ItemDragAndDropEffect />
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2220
</DataTemplate>
2321
</ListView.ItemTemplate>
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</ListView>
25-
</ContentPage>
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</ContentView>

‎GetStarted/Notes/MultiPage/Notes/NotesPage.xaml.cs‎

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namespace Notes
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{
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public partial class NotesPage : ContentPage
10+
public partial class NotesView : ContentView
1111
{
12-
public NotesPage()
12+
public NotesView()
1313
{
1414
InitializeComponent();
1515
}
1616

17-
protected override void OnAppearing()
18-
{
19-
base.OnAppearing();
20-
21-
var notes = new List<Note>();
22-
23-
var files = Directory.EnumerateFiles(App.FolderPath, "*.notes.txt");
24-
foreach (var filename in files)
25-
{
26-
notes.Add(new Note
27-
{
28-
Filename = filename,
29-
Text = File.ReadAllText(filename),
30-
Date = File.GetCreationTime(filename)
31-
});
32-
}
17+
3318

34-
listView.ItemsSource = notes
35-
.OrderBy(d => d.Date)
36-
.ToList();
37-
}
3819

39-
async void OnNoteAddedClicked(object sender, EventArgs e)
40-
{
41-
await Navigation.PushAsync(new NoteEntryPage
42-
{
43-
BindingContext = new Note()
44-
});
45-
}
4620

47-
async void OnListViewItemSelected(object sender, SelectedItemChangedEventArgs e)
21+
void OnListViewItemSelected(object sender, SelectedItemChangedEventArgs e)
4822
{
49-
if (e.SelectedItem != null)
50-
{
51-
await Navigation.PushAsync(new NoteEntryPage
52-
{
53-
BindingContext = e.SelectedItem as Note
54-
});
55-
}
23+
MainPage.Current.OnListViewItemSelected(e.SelectedItem as Note);
5624
}
5725
}
5826
}

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