User/jecollin/simpleislandapp (#307)

* Initial app from Desktop Win32 application template

* Add nuget reference to WinAppSDK 1.4 preview

* Add nuget reference to CppWinRT

* Simple island app now shows an island with a WebView2 and TextBox

* Respond to some PR feedback.  Removed the globals, improved the error handling.

* Respond to PR feedback

* PR Feedback: Enable arm64, use manual event loop

* PR feedack: move to subdir cpp-win32-unpackaged

* Sample instructions: Move to directory named 'Islands'

* Update to 1.4 stable, add some comments

* Add README

* Add SamplesCI-Islands.yml

* Update sample md

* Add support for tab navigation through the island.

* Add some comments, increase warning level.

* Small doc update

---------

Co-authored-by: Jesse Collins <Jesse.Collins@microsoft.com>

Author: JesseCol

Samples/Islands/README.md

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+---
+page_type: sample
+languages:
+- cppwinrt
+- cpp
+products:
+- windows
+- windows-app-sdk
+name: "Simple Island App"
+urlFragment: SimpleIslandApp
+description: "Shows how to add a WinAppSDK island to a simple Win32 app."
+extendedZipContent:
+- path: LICENSE
+  target: LICENSE
+---
+
+# Simple Island App
+
+This sample shows how to add a WinAppSDK island with Xaml content to a Win32 app.  It was first created with the C++ "Windows Desktop Application"
+template in Visual Studio, which yields a boilerplate Win32 app that uses Windows APIs that have been around for a long time.
+
+This sample is an "unpackaged" app, so it will run like a win32 app that hasn't been changed for a while.
+
+This sample uses Windows App SDK as a "framework package".  This means that the Windows App SDK runtime must be installed for it to run.
+
+## What is a WinAppSDK Island?
+
+A WinAppSDK island is a set of APIs that allows an app author to connect two UI frameworks together.  This sample demonstrates how
+to connect Xaml content into a Win32 app.
+
+## Prerequisites
+
+* See [System requirements for Windows app development](https://docs.microsoft.com/windows/apps/windows-app-sdk/system-requirements).
+* Make sure that your development environment is set up correctly—see [Install tools for developing apps for Windows 10 and Windows 11](https://docs.microsoft.com/windows/apps/windows-app-sdk/set-up-your-development-environment).
+
+## Building and running the sample
+
+* Open the solution file (`.sln`) in Visual Studio.
+* Press Ctrl+Shift+B, or select **Build** \> **Build Solution**.
+* Press Ctrl+F5 to launch the app (without attaching a debugger)
+    > Note: If the Windows App SDK runtime isn't installed on the machine, the user will see a message box directing them to a download link.
+* Press F5 to launch the app under a debugger.
+    > Note: When running under a debugger, you may see an "Exception Thrown" dialog box in Visual Studio.  You can safely press the "Continue"
+    button to proceed.
+* To run from the command line or File Explorer, navigate to `<arch>/<config>/SimpleIslandApp` directory and run SimpleIslandApp.exe.
+* To deploy to another machine, copy the `<arch>/<config>/SimpleIslandApp` directory to that machine and run SimpleIslandApp.exe.  The sample
+runs on Windows version 17763 and later.
+
+# How to add an Island with Xaml content to your own Win32 app
+
+Here's the basic steps to add an island to your own Win32 app, leveraging code from this sample:
+1. Add a NuGet reference to the Microsoft.WindowsAppSDK package (latest stable version).
+2. Add a NuGet reference to the Microsoft.Windows.CppWinRT package (latest stable version).
+3. Make some modifications to your vcxproj file and main message loop -- look for the tag "Island-support" in the sample code.
+4. Add an implementation for your Xaml App object.  Feel free to copy the App.* files from this sample, as well as the vcxproj entries.
+The App object is needed for many of the Xaml controls to work, and it also enables metadata lookups for your app.
+5. Optional: Add a MainPage to create your first page of Xaml.  You can copy it from this sample app.
+6. Modify your application to create your Xaml App object.  After that, create a DesktopWindowXamlSource object to hold
+your Xaml content and position it within your HWND in your app wherever you'd like.
+

Samples/Islands/cpp-win32-unpackaged/App.idl

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+namespace SimpleIslandApp
+{
+}

Samples/Islands/cpp-win32-unpackaged/App.xaml

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) Microsoft Corporation.
+ Licensed under the MIT License. -->
+<Application
+    x:Class="SimpleIslandApp.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:SimpleIslandApp">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
+                <!-- Other merged dictionaries here -->
+            </ResourceDictionary.MergedDictionaries>
+            <!-- Other app resources here -->
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

Samples/Islands/cpp-win32-unpackaged/App.xaml.cpp

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+#include "pch.h"
+
+#include "App.xaml.h"
+
+using namespace winrt;
+using namespace Windows::UI::Xaml;
+
+namespace winrt::SimpleIslandApp::implementation
+{
+    void App::OnLaunched(winrt::Microsoft::UI::Xaml::LaunchActivatedEventArgs const&)
+    {
+    }
+}
+

Samples/Islands/cpp-win32-unpackaged/App.xaml.h

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+#pragma once
+
+#include "App.xaml.g.h"
+
+#include <winrt/Microsoft.UI.Xaml.Hosting.h>
+
+namespace winrt::SimpleIslandApp::implementation
+{
+    struct App : AppT<App>
+    {
+        App()
+            : m_windowsXamlManager(winrt::Microsoft::UI::Xaml::Hosting::WindowsXamlManager::InitializeForCurrentThread())
+        { }
+
+        void OnLaunched(winrt::Microsoft::UI::Xaml::LaunchActivatedEventArgs const&);
+
+    private:
+        winrt::Microsoft::UI::Xaml::Hosting::WindowsXamlManager m_windowsXamlManager{ nullptr };
+    };
+}

Samples/Islands/cpp-win32-unpackaged/MainPage.cpp

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+#include "pch.h"
+
+#include "MainPage.h"
+
+using namespace winrt;
+using namespace Microsoft::UI::Xaml;
+
+namespace winrt::SimpleIslandApp::implementation
+{
+    int32_t MainPage::MyProperty()
+    {
+        throw hresult_not_implemented();
+    }
+
+    void MainPage::MyProperty(int32_t /* value */)
+    {
+        throw hresult_not_implemented();
+    }
+
+    void MainPage::ClickHandler(IInspectable const&, RoutedEventArgs const&)
+    {
+        Button().Content(box_value(L"Clicked"));
+    }
+}

Samples/Islands/cpp-win32-unpackaged/MainPage.h

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+#pragma once
+
+#include "MainPage.g.h"
+
+namespace winrt::SimpleIslandApp::implementation
+{
+    struct MainPage : MainPageT<MainPage>
+    {
+        MainPage() 
+        {
+            // Xaml objects should not call InitializeComponent during construction.
+            // See https://github.com/microsoft/cppwinrt/tree/master/nuget#initializecomponent
+        }
+
+        int32_t MyProperty();
+        void MyProperty(int32_t value);
+
+        void ClickHandler(Windows::Foundation::IInspectable const& sender, Microsoft::UI::Xaml::RoutedEventArgs const& args);
+    };
+}
+
+namespace winrt::SimpleIslandApp::factory_implementation
+{
+    struct MainPage : MainPageT<MainPage, implementation::MainPage>
+    {
+    };
+}

Samples/Islands/cpp-win32-unpackaged/MainPage.idl

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+namespace SimpleIslandApp
+{
+    [default_interface]
+    runtimeclass MainPage : Microsoft.UI.Xaml.Controls.Page
+    {
+        MainPage();
+        Int32 MyProperty;
+    }
+}

Samples/Islands/cpp-win32-unpackaged/MainPage.xaml

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+<!-- Copyright (c) Microsoft Corporation.
+ Licensed under the MIT License. -->
+<Page
+    x:Class="SimpleIslandApp.MainPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:SimpleIslandApp"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d">
+    <Grid Padding="10">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="50"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="50"/>
+        </Grid.RowDefinitions>
+        <StackPanel Orientation="Horizontal" Grid.Row="0">
+            <Button x:Name="Button" Click="ClickHandler">Click Me</Button>
+            <TextBox Text="Text goes here" Margin="10" />
+        </StackPanel>
+        <WebView2 Grid.Row="1" Source="http://bing.com" />
+        <Button Grid.Row="2">Last Button</Button>
+    </Grid>
+</Page>

Samples/Islands/cpp-win32-unpackaged/Resource.h

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+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by SimpleIslandApp.rc
+
+#define IDS_APP_TITLE			103
+
+#define IDR_MAINFRAME			128
+#define IDD_SIMPLEISLANDAPP_DIALOG	102
+#define IDD_ABOUTBOX			103
+#define IDM_ABOUT				104
+#define IDM_EXIT				105
+#define IDI_SIMPLEISLANDAPP			107
+#define IDI_SMALL				108
+#define IDC_SIMPLEISLANDAPP			109
+#define IDC_MYICON				2
+#ifndef IDC_STATIC
+#define IDC_STATIC				-1
+#endif
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+
+#define _APS_NO_MFC					130
+#define _APS_NEXT_RESOURCE_VALUE	129
+#define _APS_NEXT_COMMAND_VALUE		32771
+#define _APS_NEXT_CONTROL_VALUE		1000
+#define _APS_NEXT_SYMED_VALUE		110
+#endif
+#endif