1 files changed, 244 insertions, 0 deletions
diff --git a/general/WinHEC 2017 Lab/Toaster Support App/App/CustomCapability/cpp/DeviceList.cpp b/general/WinHEC 2017 Lab/Toaster Support App/App/CustomCapability/cpp/DeviceList.cpp
new file mode 100644
index 00000000..cb3a7a8e
--- /dev/null
+++ b/general/WinHEC 2017 Lab/Toaster Support App/App/CustomCapability/cpp/DeviceList.cpp
@@ -0,0 +1,244 @@
+#include "pch.h"
+#include "DeviceList.h"
+#include "MainPage.xaml.h"
+#include "App.xaml.h"
+
+using namespace SDKTemplate;
+
+using namespace Platform;
+using namespace Platform::Collections;
+using namespace Windows::ApplicationModel;
+using namespace Windows::Devices::Enumeration;
+using namespace Windows::Devices::Custom;
+using namespace Windows::Foundation;
+using namespace Windows::UI::Core;
+using namespace Windows::UI::Xaml;
+using namespace Windows::UI::Xaml::Documents;
+
+DeviceList^ DeviceList::_Current = nullptr;
+
+DeviceList^ DeviceList::Current::get()
+{
+    if (DeviceList::_Current == nullptr) 
+    {
+        DeviceList::_Current = ref new DeviceList();
+    }
+    return DeviceList::_Current;
+}
+
+DeviceList::DeviceList() : m_WatcherStarted(false), m_WatcherSuspended(false)
+{
+    m_Fx2Watcher = nullptr;
+    m_List = ref new Vector<DeviceListEntry^>();
+    InitDeviceWatcher();
+
+    // Register for app suspend/resume handlers
+    App::Current->Suspending += ref new SuspendingEventHandler(this, &DeviceList::SuspendDeviceWatcher);
+    App::Current->Resuming += ref new EventHandler<Object^>(this, &DeviceList::ResumeDeviceWatcher);
+}
+
+void DeviceList::InitDeviceWatcher()
+{
+    // Define the selector to enumerate all of the fx2 device interface class instances.
+    // Use the DeviceInterfaceGuid provided by the driver (Fx2Driver, in this case).
+    auto selector = CustomDevice::GetDeviceSelector(Fx2Driver::DeviceInterfaceGuid);
+
+    // Set of properties to retrieve
+    auto properties = ref new Vector<String^>({ "System.Devices.DeviceInstanceId" });
+
+    // Create a device watcher to look for instances of the fx2 device interface.
+    m_Fx2Watcher = DeviceInformation::CreateWatcher(selector, properties);
+
+    m_Fx2Watcher->Added += ref new TypedEventHandler<DeviceWatcher^, DeviceInformation^>(this, &DeviceList::OnFx2Added);
+    m_Fx2Watcher->Removed += ref new TypedEventHandler<DeviceWatcher^, DeviceInformationUpdate^>(this, &DeviceList::OnFx2Removed);
+    m_Fx2Watcher->EnumerationCompleted += ref new TypedEventHandler<DeviceWatcher^, Object^>(this, &DeviceList::OnFx2EnumerationComplete);
+}
+
+void DeviceList::StartFx2Watcher() 
+{
+    MainPage::Current->NotifyUser("starting device watcher", NotifyType::StatusMessage);
+
+    std::for_each(
+        begin(m_List),
+        end(m_List),
+        [](DeviceListEntry^ Entry) {
+        Entry->Matched = false;
+    });
+
+    WatcherStarted = true;
+    m_Fx2Watcher->Start();
+}
+
+void DeviceList::StopFx2Watcher() 
+{
+    MainPage::Current->NotifyUser("stopping fx2 watcher", NotifyType::StatusMessage);
+    m_Fx2Watcher->Stop();
+    WatcherStarted = false;
+}
+
+void DeviceList::CreateBooleanTable(
+    InlineCollection^ Table,
+    const Platform::Array<bool>^ NewValues,
+    const Platform::Array<bool>^ OldValues,
+    String^ /* IndexTitle */,
+    String^ /* ValueTitle */,
+    String^ TrueValue,
+    String^ FalseValue)
+{
+    Table->Clear();
+
+    for (int i = 0; i < (int)NewValues->Length; i += 1) 
+    {
+        auto line = ref new Span();
+        auto block = ref new Run();
+        block->Text = (i + 1).ToString();
+        line->Inlines->Append(block);
+
+        block = ref new Run();
+        block->Text = "    ";
+        line->Inlines->Append(block);
+
+        block = ref new Run();
+        block->Text = NewValues[i] ? TrueValue : FalseValue;
+
+        if ((OldValues != nullptr) && (OldValues[i] != NewValues[i])) 
+        {
+            auto bold = ref new Bold();
+            bold->Inlines->Append(block);
+            line->Inlines->Append(bold);
+        }
+        else 
+        {
+            line->Inlines->Append(block);
+        }
+
+        line->Inlines->Append(ref new LineBreak());
+
+        Table->Append(line);
+    }
+}
+
+DeviceListEntry^ DeviceList::FindDevice(String^ Id)
+{
+    auto i = std::find_if(
+        begin(m_List),
+        end(m_List),
+        [Id](DeviceListEntry^ e) {return e->Id == Id; });
+
+    if (i == end(m_List)) 
+    {
+        return nullptr;
+    }
+    else 
+    {
+        return *i;
+    }
+}
+
+void DeviceList::OnFx2Added(DeviceWatcher ^ /* Sender */, DeviceInformation^ DevInterface)
+{
+    MainPage::Current->Dispatcher->RunAsync(
+        CoreDispatcherPriority::Normal,
+        ref new DispatchedHandler(
+            [this, DevInterface]()->void 
+    {
+        MainPage::Current->NotifyUser("OnFx2Added: " + DevInterface->Id, NotifyType::StatusMessage);
+
+        // search the device list for a device with a matching interface ID
+        auto match = FindDevice(DevInterface->Id);
+
+        // If we found a match then mark it as verified and return
+        if (match != nullptr) 
+        {
+            match->Matched = true;
+            return;
+        }
+
+        // Create a new elemetn for this device interface, and queue up the query of its
+        // device information
+        match = ref new DeviceListEntry(DevInterface);
+
+        // Add the new element to the end of the list of devices
+        m_List->Append(match);
+    }));
+}
+
+void DeviceList::OnFx2Removed(DeviceWatcher ^ /* Sender */, DeviceInformationUpdate^ DevInterface)
+{
+    auto deviceId = DevInterface->Id;
+
+    MainPage::Current->Dispatcher->RunAsync(
+        CoreDispatcherPriority::Normal,
+        ref new DispatchedHandler(
+            [this, deviceId]() 
+    {
+        MainPage::Current->NotifyUser("OnFx2Removed: " + deviceId, NotifyType::StatusMessage);
+
+        // Search the list of devices for one with a matching ID.  Move the matched 
+        // item to the end of the list.
+        auto i = std::remove_if(
+            begin(m_List),
+            end(m_List),
+            [deviceId](DeviceListEntry^ e) {return e->Id == deviceId; });
+
+        // if there's no match return.
+        if (i == end(m_List)) 
+        {
+            return;
+        }
+
+        // Remove the last item from the list.
+        MainPage::Current->NotifyUser("OnFx2Removed: " + deviceId + " removed", NotifyType::StatusMessage);
+        m_List->RemoveAtEnd();
+    }));
+}
+
+void DeviceList::OnFx2EnumerationComplete(DeviceWatcher ^ /* Sender */, Object ^ /* o */)
+{
+    MainPage::Current->Dispatcher->RunAsync(
+        CoreDispatcherPriority::Normal,
+        ref new DispatchedHandler(
+            [this]() 
+    {
+        MainPage::Current->NotifyUser("OnFx2EnumerationComplete", NotifyType::StatusMessage);
+
+        DeviceList^ me = this;
+
+        // Move all the unmatched elements to the end of the list
+        auto i = std::remove_if(
+            begin(m_List),
+            end(m_List),
+            [](DeviceListEntry^ e) { return e->Matched == false; });
+
+        // Determine the number of unmatched entries
+        auto unmatchedCount = end(m_List) - i;
+
+        while (unmatchedCount > 0) 
+        {
+            m_List->RemoveAtEnd();
+            unmatchedCount -= 1;
+        }
+    }));
+}
+
+void DeviceList::SuspendDeviceWatcher(Object^, SuspendingEventArgs^)
+{
+    if (WatcherStarted) 
+    {
+        m_WatcherSuspended = true;
+        StopFx2Watcher();
+    }
+    else 
+    {
+        m_WatcherSuspended = false;
+    }
+}
+
+void DeviceList::ResumeDeviceWatcher(Object^, Object^)
+{
+    if (m_WatcherSuspended) 
+    {
+        m_WatcherSuspended = false;
+        StartFx2Watcher();
+    }
+}