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Stop using XAML for editor sample

This commit is contained in:
Frank A. Krueger 2018-03-12 20:56:12 -07:00
parent 80dc2bfaf9
commit 1f5b1fe13a
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GPG Key ID: 0471C67474FFE664
4 changed files with 103 additions and 102 deletions
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6
Samples/Samples.csproj
View File

@ -32,9 +32,6 @@
<Compile Update="DisplayAlertPage.xaml.cs">
<DependentUpon>DisplayAlertPage.xaml</DependentUpon>
</Compile>
<Compile Update="XamlPreviewPage.xaml.cs">
<DependentUpon>XamlPreviewPage.xaml</DependentUpon>
</Compile>
</ItemGroup>
<ItemGroup>
@ -56,9 +53,6 @@
<EmbeddedResource Update="WeatherApp\WeatherPage.xaml">
<Generator>MSBuild:Compile</Generator>
</EmbeddedResource>
<EmbeddedResource Update="XamlPreviewPage.xaml">
<Generator>MSBuild:UpdateDesignTimeXaml</Generator>
</EmbeddedResource>
</ItemGroup>
<ItemGroup>

22
Samples/XamlPreviewPage.xaml
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@ -1,22 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="Samples.XamlPreviewPage">
<ContentPage.Content>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<StackLayout Orientation="Vertical" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2">
<Label Text="Xamarin.Forms XAML Editor" FontSize="24" FontAttributes="Bold" Margin="8,8,8,0" />
<Label Text="Edit the XAML below to see a live preview on the right" Margin="8,0,8,8" />
</StackLayout>
<Editor x:Name="editor" FontFamily="monospace" FontSize="12" Grid.Row="1" Grid.Column="0" />
<ContentView x:Name="results" Grid.Row="1" Grid.Column="1" BackgroundColor="White" />
</Grid>
</ContentPage.Content>
</ContentPage>

72
Samples/XamlPreviewPage.xaml.cs
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@ -1,72 +0,0 @@
using System;
using System.Collections.Generic;
using System.Threading;
using Xamarin.Forms;
namespace Samples
{
public partial class XamlPreviewPage : ContentPage
{
public XamlPreviewPage ()
{
InitializeComponent ();
editor.Text = @"<ContentView
xmlns=""http://xamarin.com/schemas/2014/forms""
xmlns:x=""http://schemas.microsoft.com/winfx/2009/xaml"">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height=""*"" />
<RowDefinition Height=""*"" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width=""*"" />
<ColumnDefinition Width=""*"" />
</Grid.ColumnDefinitions>
<StackLayout Grid.Row=""0"" Grid.Column=""0"">
<Label Text=""Top Left"" />
<Entry Placeholder=""I'm ready for some text"" />
<Button Text=""I'm a button, but I don't do anything"" />
</StackLayout>
<Label Text=""Top Right"" Grid.Row=""0"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#c5000b"" />
<Label Text=""Bottom Left"" Grid.Row=""1"" Grid.Column=""0"" TextColor=""Black"" BackgroundColor=""#ffd320"" />
<Label Text=""Bottom Right"" Grid.Row=""1"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#008000"" />
</Grid>
</ContentView>";
editor.TextChanged += (sender, e) => DisplayXaml ();
DisplayXaml ();
}
CancellationTokenSource lastCts = null;
public void DisplayXaml ()
{
try {
var cts = new CancellationTokenSource ();
var token = cts.Token;
lastCts?.Cancel ();
lastCts = cts;
var asm = typeof (Xamarin.Forms.Xaml.Internals.XamlTypeResolver).Assembly;
var xamlLoaderType = asm.GetType ("Xamarin.Forms.Xaml.XamlLoader");
var loadArgTypes = new[] { typeof (object), typeof (string) };
var loadMethod = xamlLoaderType.GetMethod ("Load", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public, null, System.Reflection.CallingConventions.Any, loadArgTypes, null);
var contentView = new ContentView ();
loadMethod.Invoke (null, new object[] { contentView, editor.Text });
if (!token.IsCancellationRequested) {
results.Content = contentView;
}
}
catch (OperationCanceledException) {
}
catch (Exception ex) {
results.Content = new Label {
TextColor = Color.DarkRed,
FontSize = 12,
Text = ex.ToString (),
};
}
}
}
}

105
Samples/XamlPreviewPageSample.cs
View File

@ -1,6 +1,7 @@
using System;
using System.Threading;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
namespace Samples
{
@ -10,8 +11,108 @@ namespace Samples
public Ooui.Element CreateElement ()
{
var page = new XamlPreviewPage ();
var page = new XamlEditorPage ();
return page.GetOouiElement ();
}
}
public partial class XamlEditorPage : ContentPage
{
Editor editor;
ContentView results;
public XamlEditorPage ()
{
InitializeComponent ();
editor.Text = @"<ContentView
xmlns=""http://xamarin.com/schemas/2014/forms""
xmlns:x=""http://schemas.microsoft.com/winfx/2009/xaml"">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height=""*"" />
<RowDefinition Height=""*"" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width=""*"" />
<ColumnDefinition Width=""*"" />
</Grid.ColumnDefinitions>
<StackLayout Grid.Row=""0"" Grid.Column=""0"">
<Label Text=""Top Left"" />
<Entry Placeholder=""I'm ready for some text"" />
<Button Text=""I'm a button, but I don't do anything"" />
</StackLayout>
<Label Text=""Top Right"" Grid.Row=""0"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#c5000b"" />
<Label Text=""Bottom Left"" Grid.Row=""1"" Grid.Column=""0"" TextColor=""Black"" BackgroundColor=""#ffd320"" />
<Label Text=""Bottom Right"" Grid.Row=""1"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#008000"" />
</Grid>
</ContentView>";
editor.TextChanged += (sender, e) => DisplayXaml ();
DisplayXaml ();
}
void InitializeComponent ()
{
var grid = new Grid ();
grid.RowDefinitions.Add (new RowDefinition { Height = GridLength.Auto });
grid.RowDefinitions.Add (new RowDefinition { Height = GridLength.Star });
grid.ColumnDefinitions.Add (new ColumnDefinition { Width = GridLength.Star });
grid.ColumnDefinitions.Add (new ColumnDefinition { Width = GridLength.Star });
editor = new Editor {
FontSize = 12,
FontFamily = "monospace",
};
editor.SetValue (Grid.ColumnProperty, 0);
editor.SetValue (Grid.RowProperty, 1);
results = new ContentView ();
results.SetValue (Grid.ColumnProperty, 1);
results.SetValue (Grid.RowProperty, 1);
var title = new Label {
Text = "XAML Editor",
FontSize = 24,
FontAttributes = FontAttributes.Bold,
Margin = new Thickness (8),
};
title.SetValue (Grid.ColumnProperty, 0);
title.SetValue (Grid.RowProperty, 0);
grid.Children.Add (title);
grid.Children.Add (editor);
grid.Children.Add (results);
Content = grid;
}
CancellationTokenSource lastCts = null;
public void DisplayXaml ()
{
try {
var cts = new CancellationTokenSource ();
var token = cts.Token;
lastCts?.Cancel ();
lastCts = cts;
var contentView = new ContentView ();
contentView.LoadFromXaml (editor.Text);
if (!token.IsCancellationRequested) {
results.Content = contentView;
}
}
catch (OperationCanceledException) {
}
catch (Exception ex) {
results.Content = new Label {
TextColor = Color.DarkRed,
FontSize = 12,
Text = ex.ToString (),
};
}
}
}
}