Add C++ Sample for Moving between ListViews

Samples/XamlDragAndDrop/cpp/DragAndDropSampleNative.vcxproj

@@ -101,10 +101,10 @@
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
-    <PropertyGroup>
-        <IncludePath>$(VC_IncludePath);$(UniversalCRT_IncludePath);$(WindowsSDK_IncludePath);..\..\..\SharedContent\cpp</IncludePath>
-    </PropertyGroup>
-    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
+  <PropertyGroup>
+    <IncludePath>$(VC_IncludePath);$(UniversalCRT_IncludePath);$(WindowsSDK_IncludePath);..\..\..\SharedContent\cpp</IncludePath>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
     <ClCompile>
       <AdditionalOptions>/bigobj %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4453;28204</DisableSpecificWarnings>
@@ -158,6 +158,9 @@
     <ClInclude Include="Scenario3_StartDragAsync.xaml.h">
       <DependentUpon>Scenario3_StartDragAsync.xaml</DependentUpon>
     </ClInclude>
+    <ClInclude Include="Scenario4_MoveBetweenListView.xaml.h">
+      <DependentUpon>Scenario4_MoveBetweenListView.xaml</DependentUpon>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ApplicationDefinition Include="..\..\..\SharedContent\xaml\App.xaml">
@@ -172,6 +175,7 @@
     <Page Include="..\..\..\SharedContent\xaml\Styles.xaml">
       <Link>Styles\Styles.xaml</Link>
     </Page>
+    <Page Include="Scenario4_MoveBetweenListView.xaml" />
   </ItemGroup>
   <ItemGroup>
     <AppxManifest Include="Package.appxmanifest">
@@ -203,6 +207,9 @@
     <ClCompile Include="Scenario3_StartDragAsync.xaml.cpp">
       <DependentUpon>Scenario3_StartDragAsync.xaml</DependentUpon>
     </ClCompile>
+    <ClCompile Include="Scenario4_MoveBetweenListView.xaml.cpp">
+      <DependentUpon>Scenario4_MoveBetweenListView.xaml</DependentUpon>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <Image Include="Assets\dropcursor.png" />

Samples/XamlDragAndDrop/cpp/DragAndDropSampleNative.vcxproj.filters

@@ -39,6 +39,7 @@
     <Page Include="Scenario3_StartDragAsync.xaml" />
     <Page Include="..\..\..\SharedContent\cpp\MainPage.xaml" />
     <Page Include="..\..\..\SharedContent\xaml\Styles.xaml" />
+    <Page Include="Scenario4_MoveBetweenListView.xaml" />
   </ItemGroup>
   <ItemGroup>
     <Image Include="Assets\dropcursor.png">

Samples/XamlDragAndDrop/cpp/SampleConfiguration.cpp

@@ -19,5 +19,6 @@ Platform::Array<Scenario>^ MainPage::scenariosInner = ref new Platform::Array<Sc
 {
     { "ListView Drag and Drop and Reorder", "SDKTemplate.Scenario1_ListView" },
     { "Drag UI Customization", "SDKTemplate.Scenario2_DragUICustomization" },
-    { "StartDragAsync", "SDKTemplate.Scenario3_StartDragAsync" }
+    { "StartDragAsync", "SDKTemplate.Scenario3_StartDragAsync" },
+	{ "Move Between ListViews", "SDKTemplate.Scenario4_MoveBetweenListView" }
 };

Samples/XamlDragAndDrop/cpp/Scenario4_MoveBetweenListView.xaml

@@ -0,0 +1,57 @@
+<!-- 
+//*********************************************************
+//
+// Copyright (c) Microsoft. All rights reserved.
+// This code is licensed under the MIT License (MIT).
+// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
+// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
+// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
+//
+//*********************************************************
+-->
+<Page
+    x:Class="SDKTemplate.Scenario4_MoveBetweenListView"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:DragAndDropSampleNative"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d">
+
+    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition/>
+            <ColumnDefinition/>
+        </Grid.ColumnDefinitions>
+        <StackPanel Margin="0,0,0,10" Grid.ColumnSpan="2">
+            <TextBlock Text="Description:" Style="{StaticResource SampleHeaderTextStyle}"/>
+            <TextBlock Style="{StaticResource ScenarioDescriptionTextStyle}" TextWrapping="Wrap" Text="This scenario illustrates how to use ListView's Drag and Drop to reorder single items while maintaining the requested position."/>
+        </StackPanel>
+
+        <TextBlock Grid.Row="1" Margin="8,4"
+                    VerticalAlignment="Bottom"
+                    Text="All Items"/>
+        <ListView x:Name="SourceListView"
+                    Grid.Row="2" Margin="8,4"
+                    AllowDrop="True" CanReorderItems="True" CanDragItems="True"
+                    DragOver="ListView_DragOver"
+                    Drop="ListView_Drop"
+                    DragItemsStarting="ListView_DragItemsStarting"/>
+        <TextBlock Grid.Row="1" Grid.Column="1" Margin="8,4"
+                    VerticalAlignment="Bottom"
+                    Text="Selection"/>
+        <ListView x:Name="TargetListView"
+                    Grid.Row="2" Grid.Column="1" Margin="8,4"
+                    AllowDrop="True" CanReorderItems="True" CanDragItems="True"
+                    DragOver="ListView_DragOver"
+                    Drop="ListView_Drop"
+                    DragItemsStarting="ListView_DragItemsStarting"/>
+    </Grid>
+</Page>

Samples/XamlDragAndDrop/cpp/Scenario4_MoveBetweenListView.xaml.cpp

@@ -0,0 +1,148 @@
+//*********************************************************
+//
+// Copyright (c) Microsoft. All rights reserved.
+// This code is licensed under the MIT License (MIT).
+// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
+// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
+// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
+//
+//*********************************************************
+#include "pch.h"
+#include "Scenario4_MoveBetweenListView.xaml.h"
+
+using namespace concurrency;
+using namespace SDKTemplate;
+using namespace Platform;
+using namespace Platform::Collections;
+using namespace Windows::Foundation;
+using namespace Windows::Foundation::Collections;
+using namespace Windows::UI::Xaml;
+using namespace Windows::UI::Xaml::Controls;
+using namespace Windows::UI::Xaml::Controls::Primitives;
+using namespace Windows::UI::Xaml::Data;
+using namespace Windows::UI::Xaml::Input;
+using namespace Windows::UI::Xaml::Media;
+using namespace Windows::UI::Xaml::Navigation;
+using namespace Windows::ApplicationModel::DataTransfer;
+
+Scenario4_MoveBetweenListView::Scenario4_MoveBetweenListView() : rootPage(MainPage::Current)
+{
+    InitializeComponent();
+
+    _source = GetSampleData();
+    _target = ref new Vector<String^>();
+    SourceListView->ItemsSource = _source;
+    TargetListView->ItemsSource = _target;
+}
+
+Vector<String^>^ Scenario4_MoveBetweenListView::GetSampleData()
+{
+    return ref new Vector<String^>(
+    {
+        ref new String(L"My Research Paper"),
+        ref new String(L"Electricity Bill"),
+        ref new String(L"My To-do list"),
+        ref new String(L"TV sales receipt"),
+        ref new String(L"Water Bill"),
+        ref new String(L"Grocery List"),
+        ref new String(L"Superbowl schedule"),
+        ref new String(L"World Cup E-ticket")
+    });
+}
+
+/// <summary>
+/// DragItemsStarting is called when the Drag and Drop operation starts
+/// We take advantage of it to set the content of the DataPackage
+/// as well as indicate which operations are supported
+/// </summary>
+/// <param name="sender"></param>
+/// <param name="e"></param>
+void Scenario4_MoveBetweenListView::ListView_DragItemsStarting(Platform::Object^ sender, Windows::UI::Xaml::Controls::DragItemsStartingEventArgs^ e)
+{
+	// Prepare a string with one dragged item per line
+	// Set the content of the DataPackage
+	if (e->Items->Size > 0)
+	{
+		e->Data->SetText(dynamic_cast<String^>(e->Items->GetAt(0)));
+		// As we want our Reference list to say intact, we only allow Move
+		e->Data->RequestedOperation = DataPackageOperation::Move;
+	}
+}
+
+/// <summary>
+/// DragOver is called when the dragged pointer moves over a UIElement with AllowDrop=True
+/// We need to return an AcceptedOperation != None in either DragOver or DragEnter
+/// </summary>
+/// <param name="sender"></param>
+/// <param name="e"></param>
+void Scenario4_MoveBetweenListView::ListView_DragOver(Platform::Object^ sender, Windows::UI::Xaml::DragEventArgs^ e)
+{
+    // Our list only accepts text
+    e->AcceptedOperation = (e->DataView->Contains(StandardDataFormats::Text)) ? DataPackageOperation::Move : DataPackageOperation::None;
+}
+
+/// <summary>
+/// We need to return the effective operation from Drop
+/// This is not important for our source ListView, but it might be if the user
+/// drags text from another source
+/// </summary>
+/// <param name="sender"></param>
+/// <param name="e"></param>
+void Scenario4_MoveBetweenListView::ListView_Drop(Platform::Object^ sender, Windows::UI::Xaml::DragEventArgs^ e)
+{
+    // This test is in theory not needed as we returned DataPackageOperation.None if
+    // the DataPackage did not contained text. However, it is always better if each
+    // method is robust by itself
+    if (e->DataView->Contains(StandardDataFormats::Text))
+    {
+        // We need to take a Deferral as we won't be able to confirm the end
+        // of the operation synchronously
+        auto def = e->GetDeferral();
+        create_task(e->DataView->GetTextAsync()).then([def, this, sender, e](String^ s)
+        {
+			// Get the lists we need to work with.
+			auto sourceList = (sender->Equals(TargetListView) ? _source : _target);
+			auto targetList = (sender->Equals(TargetListView) ? _target : _source);
+
+			// Remove item from other list
+			unsigned j;
+			if (sourceList->IndexOf(s, &j))
+			{
+				sourceList->RemoveAt(j);
+			}
+
+			// First we need to get the position in the List to drop to
+			auto listview = dynamic_cast<ListView^>(sender);
+			int index = -1;
+
+			// Determine which items in the list our pointer is inbetween.
+			for (int i = 0; i < listview->Items->Size; i++)
+			{
+				auto item = dynamic_cast<ListViewItem^>(listview->ContainerFromIndex(i));
+
+				auto p = e->GetPosition(item);
+
+				if (p.Y - item->ActualHeight < 0)
+				{
+					index = i;
+					break;
+				}
+			}
+
+			if (index < 0)
+			{
+				// We didn't find a transition point, so we're at the end of the list
+				targetList->Append(s);
+			}
+			else if (index < listview->Items->Size)
+			{
+				// Otherwise, insert at the provided index.
+				targetList->InsertAt(index, s);
+			}
+
+            e->AcceptedOperation = DataPackageOperation::Copy;
+            def->Complete();
+        });
+    }
+}

Samples/XamlDragAndDrop/cpp/Scenario4_MoveBetweenListView.xaml.h

@@ -0,0 +1,38 @@
+//*********************************************************
+//
+// Copyright (c) Microsoft. All rights reserved.
+// This code is licensed under the MIT License (MIT).
+// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
+// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
+// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
+//
+//*********************************************************
+
+#pragma once
+
+#include "Scenario4_MoveBetweenListView.g.h"
+#include "MainPage.xaml.h"
+
+namespace SDKTemplate
+{
+    /// <summary>
+    /// An empty page that can be used on its own or navigated to within a Frame.
+    /// </summary>
+    [Windows::Foundation::Metadata::WebHostHidden]
+    public ref class Scenario4_MoveBetweenListView sealed
+    {
+    public:
+        Scenario4_MoveBetweenListView();
+    private:
+        MainPage^ rootPage;
+
+        Platform::Collections::Vector<Platform::String^>^ GetSampleData();
+        Platform::Collections::Vector<Platform::String^>^ _source;
+        Platform::Collections::Vector<Platform::String^>^ _target;
+
+        void ListView_DragItemsStarting(Platform::Object^ sender, Windows::UI::Xaml::Controls::DragItemsStartingEventArgs^ e);
+        void ListView_DragOver(Platform::Object^ sender, Windows::UI::Xaml::DragEventArgs^ e);
+        void ListView_Drop(Platform::Object^ sender, Windows::UI::Xaml::DragEventArgs^ e);
+    };
+}