Add AppModel and AppView for loading apps and modify BoxArtManager to return QUrls for QML

app/app.pro

@@ -58,7 +58,8 @@ SOURCES += \
     streaming/session.cpp \
     streaming/audio.cpp \
     streaming/video.cpp \
-    gui/computermodel.cpp
+    gui/computermodel.cpp \
+    gui/appmodel.cpp
 
 HEADERS += \
     utils.h \
@@ -70,7 +71,8 @@ HEADERS += \
     settings/streamingpreferences.h \
     streaming/input.hpp \
     streaming/session.hpp \
-    gui/computermodel.h
+    gui/computermodel.h \
+    gui/appmodel.h
 
 RESOURCES += \
     resources.qrc \

app/backend/boxartmanager.cpp

@@ -7,8 +7,7 @@
 BoxArtManager::BoxArtManager(QObject *parent) :
     QObject(parent),
     m_BoxArtDir(
-        QStandardPaths::writableLocation(QStandardPaths::CacheLocation) + "/boxart"),
-    m_PlaceholderImage(":/res/no_app_image.png")
+        QStandardPaths::writableLocation(QStandardPaths::CacheLocation) + "/boxart")
 {
     if (!m_BoxArtDir.exists()) {
         m_BoxArtDir.mkpath(".");
@@ -32,16 +31,12 @@ BoxArtManager::getFilePathForBoxArt(NvComputer* computer, int appId)
     return dir.filePath(QString::number(appId) + ".png");
 }
 
-QImage BoxArtManager::loadBoxArt(NvComputer* computer, NvApp& app)
+QUrl BoxArtManager::loadBoxArt(NvComputer* computer, NvApp& app)
 {
     // Try to open the cached file
-    QFile cacheFile(getFilePathForBoxArt(computer, app.id));
-    if (cacheFile.open(QFile::ReadOnly)) {
-        // Return what we have if it's a valid image
-        QImage image = QImageReader(&cacheFile).read();
-        if (!image.isNull()) {
-            return image;
-        }
+    QString cacheFilePath = getFilePathForBoxArt(computer, app.id);
+    if (QFile::exists(cacheFilePath)) {
+        return QUrl::fromLocalFile(cacheFilePath);
     }
 
     // If we get here, we need to fetch asynchronously.
@@ -51,18 +46,22 @@ QImage BoxArtManager::loadBoxArt(NvComputer* computer, NvApp& app)
 
     // Return the placeholder then we can notify the caller
     // later when the real image is ready.
-    return m_PlaceholderImage;
+    return QUrl("qrc:/res/no_app_image.png");
 }
 
-void BoxArtManager::handleBoxArtLoadComplete(NvComputer* computer, NvApp app, QImage image)
+void BoxArtManager::handleBoxArtLoadComplete(NvComputer* computer, NvApp app, QUrl image)
 {
+    if (image.isEmpty()) {
+        image = QUrl("qrc:/res/no_app_image.png");
+    }
     emit boxArtLoadComplete(computer, app, image);
 }
 
-QImage BoxArtManager::loadBoxArtFromNetwork(NvComputer* computer, int appId)
+QUrl BoxArtManager::loadBoxArtFromNetwork(NvComputer* computer, int appId)
 {
     NvHTTP http(computer->activeAddress);
 
+    QString cachePath = getFilePathForBoxArt(computer, appId);
     QImage image;
     try {
         image = http.getBoxArt(appId);
@@ -70,8 +69,10 @@ QImage BoxArtManager::loadBoxArtFromNetwork(NvComputer* computer, int appId)
 
     // Cache the box art on disk if it loaded
     if (!image.isNull()) {
-        image.save(getFilePathForBoxArt(computer, appId));
+        if (image.save(cachePath)) {
+            return QUrl::fromLocalFile(cachePath);
+        }
     }
 
-    return image;
+    return QUrl();
 }

app/backend/boxartmanager.h

@@ -15,28 +15,27 @@ class BoxArtManager : public QObject
 public:
     explicit BoxArtManager(QObject *parent = nullptr);
 
-    QImage
+    QUrl
     loadBoxArt(NvComputer* computer, NvApp& app);
 
 signals:
     void
-    boxArtLoadComplete(NvComputer* computer, NvApp app, QImage image);
+    boxArtLoadComplete(NvComputer* computer, NvApp app, QUrl image);
 
 public slots:
 
 private slots:
     void
-    handleBoxArtLoadComplete(NvComputer* computer, NvApp app, QImage image);
+    handleBoxArtLoadComplete(NvComputer* computer, NvApp app, QUrl image);
 
 private:
-    QImage
+    QUrl
     loadBoxArtFromNetwork(NvComputer* computer, int appId);
 
     QString
     getFilePathForBoxArt(NvComputer* computer, int appId);
 
     QDir m_BoxArtDir;
-    QImage m_PlaceholderImage;
 };
 
 class NetworkBoxArtLoadTask : public QObject, public QRunnable
@@ -49,18 +48,18 @@ public:
           m_Computer(computer),
           m_App(app)
     {
-        connect(this, SIGNAL(boxArtFetchCompleted(NvComputer*,NvApp,QImage)),
-                boxArtManager, SLOT(handleBoxArtLoadComplete(NvComputer*,NvApp,QImage)));
+        connect(this, SIGNAL(boxArtFetchCompleted(NvComputer*,NvApp,QUrl)),
+                boxArtManager, SLOT(handleBoxArtLoadComplete(NvComputer*,NvApp,QUrl)));
     }
 
 signals:
-    void boxArtFetchCompleted(NvComputer* computer, NvApp app, QImage image);
+    void boxArtFetchCompleted(NvComputer* computer, NvApp app, QUrl image);
 
 private:
     void run()
     {
-        QImage image = m_Bam->loadBoxArtFromNetwork(m_Computer, m_App.id);
-        if (image.isNull()) {
+        QUrl image = m_Bam->loadBoxArtFromNetwork(m_Computer, m_App.id);
+        if (image.isEmpty()) {
             // Give it another shot if it fails once
             image = m_Bam->loadBoxArtFromNetwork(m_Computer, m_App.id);
         }

app/gui/AppView.qml

@@ -0,0 +1,59 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.2
+
+import AppModel 1.0
+
+GridView {
+    property int computerIndex
+
+    anchors.fill: parent
+    anchors.leftMargin: 5
+    anchors.topMargin: 5
+    anchors.rightMargin: 5
+    anchors.bottomMargin: 5
+    cellWidth: 225; cellHeight: 350;
+    focus: true
+
+    function createModel()
+    {
+        var model = Qt.createQmlObject('import AppModel 1.0; AppModel {}', parent, "")
+        model.initialize(computerIndex)
+        return model
+    }
+
+    model: createModel()
+
+    delegate: Item {
+        width: 200; height: 300;
+
+        Image {
+            id: appIcon
+            anchors.horizontalCenter: parent.horizontalCenter;
+            source: model.boxart
+            sourceSize {
+                width: 150
+                height: 200
+            }
+        }
+
+        Text {
+            id: appNameText
+            text: model.name
+            color: "white"
+
+            width: parent.width
+            height: 100
+            anchors.top: appIcon.bottom
+            font.pointSize: 26
+            horizontalAlignment: Text.AlignHCenter
+            wrapMode: Text.Wrap
+        }
+
+        MouseArea {
+            anchors.fill: parent
+            onClicked: {
+                parent.GridView.view.currentIndex = index
+            }
+        }
+    }
+}

app/gui/appmodel.cpp

@@ -0,0 +1,124 @@
+#include "appmodel.h"
+
+AppModel::AppModel(QObject *parent)
+    : QAbstractListModel(parent)
+{
+    connect(&m_ComputerManager, &ComputerManager::computerStateChanged,
+            this, &AppModel::handleComputerStateChanged);
+    connect(&m_BoxArtManager, &BoxArtManager::boxArtLoadComplete,
+            this, &AppModel::handleBoxArtLoaded);
+}
+
+void AppModel::initialize(int computerIndex)
+{
+    Q_ASSERT(computerIndex < m_ComputerManager.getComputers().count());
+    m_Computer = m_ComputerManager.getComputers().at(computerIndex);
+    m_Apps = m_Computer->appList;
+    m_CurrentGameId = m_Computer->currentGameId;
+
+    m_ComputerManager.startPolling();
+}
+
+int AppModel::rowCount(const QModelIndex &parent) const
+{
+    // For list models only the root node (an invalid parent) should return the list's size. For all
+    // other (valid) parents, rowCount() should return 0 so that it does not become a tree model.
+    if (parent.isValid())
+        return 0;
+
+    return m_Apps.count();
+}
+
+QVariant AppModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return QVariant();
+
+    Q_ASSERT(index.row() < m_Apps.count());
+    NvApp app = m_Apps.at(index.row());
+
+    switch (role)
+    {
+    case NameRole:
+        return app.name;
+    case RunningRole:
+        return m_Computer->currentGameId == app.id;
+    case BoxArtRole:
+        // FIXME: const-correctness
+        return const_cast<BoxArtManager&>(m_BoxArtManager).loadBoxArt(m_Computer, app);
+    default:
+        return QVariant();
+    }
+}
+
+QHash<int, QByteArray> AppModel::roleNames() const
+{
+    QHash<int, QByteArray> names;
+
+    names[NameRole] = "name";
+    names[RunningRole] = "running";
+    names[BoxArtRole] = "boxart";
+
+    return names;
+}
+
+void AppModel::handleComputerStateChanged(NvComputer* computer)
+{
+    // Ignore updates for computers that aren't ours
+    if (computer != m_Computer) {
+        return;
+    }
+
+    // First, process additions/removals from the app list. This
+    // is required because the new game may now be running, so
+    // we can't check that first.
+    if (computer->appList != m_Apps) {
+        // Just reset the whole thing if the list changes
+        beginResetModel();
+        m_Apps = computer->appList;
+        m_CurrentGameId = computer->currentGameId;
+        endResetModel();
+        return;
+    }
+
+    // Finally, process changes to the active app
+    if (computer->currentGameId != m_CurrentGameId) {
+        // First, invalidate the running state of newly running game
+        for (int i = 0; i < m_Apps.count(); i++) {
+            if (m_Apps[i].id == computer->currentGameId) {
+                emit dataChanged(createIndex(i, 0),
+                                 createIndex(i, 0),
+                                 QVector<int>() << RunningRole);
+                break;
+            }
+        }
+
+        // Next, invalidate the running state of the old game (if it exists)
+        if (m_CurrentGameId != 0) {
+            for (int i = 0; i < m_Apps.count(); i++) {
+                if (m_Apps[i].id == m_CurrentGameId) {
+                    emit dataChanged(createIndex(i, 0),
+                                     createIndex(i, 0),
+                                     QVector<int>() << RunningRole);
+                    break;
+                }
+            }
+        }
+
+        // Now update our internal state
+        m_CurrentGameId = m_Computer->currentGameId;
+    }
+}
+
+void AppModel::handleBoxArtLoaded(NvComputer* computer, NvApp app, QUrl /* image */)
+{
+    Q_ASSERT(computer == m_Computer);
+
+    int index = m_Apps.indexOf(app);
+    Q_ASSERT(index >= 0);
+
+    // Let our view know the box art data has changed for this app
+    emit dataChanged(createIndex(index, 0),
+                     createIndex(index, 0),
+                     QVector<int>() << BoxArtRole);
+}

app/gui/appmodel.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include "backend/boxartmanager.h"
+#include "backend/computermanager.h"
+
+#include <QAbstractListModel>
+
+class AppModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+    enum Roles
+    {
+        NameRole = Qt::UserRole,
+        RunningRole,
+        BoxArtRole
+    };
+
+public:
+    explicit AppModel(QObject *parent = nullptr);
+
+    // Must be called before any QAbstractListModel functions
+    Q_INVOKABLE void initialize(int computerIndex);
+
+    QVariant data(const QModelIndex &index, int role) const override;
+
+    int rowCount(const QModelIndex &parent) const override;
+
+    virtual QHash<int, QByteArray> roleNames() const override;
+
+private slots:
+    void handleComputerStateChanged(NvComputer* computer);
+
+    void handleBoxArtLoaded(NvComputer* computer, NvApp app, QUrl image);
+
+private:
+    NvComputer* m_Computer;
+    BoxArtManager m_BoxArtManager;
+    ComputerManager m_ComputerManager;
+    QVector<NvApp> m_Apps;
+    int m_CurrentGameId;
+};

app/main.cpp

@@ -2,6 +2,7 @@
 #include <QQmlApplicationEngine>
 
 #include "gui/computermodel.h"
+#include "gui/appmodel.h"
 
 // Don't let SDL hook our main function, since Qt is already
 // doing the same thing
@@ -28,6 +29,7 @@ int main(int argc, char *argv[])
 
     // Register our C++ types for QML
     qmlRegisterType<ComputerModel>("ComputerModel", 1, 0, "ComputerModel");
+    qmlRegisterType<AppModel>("AppModel", 1, 0, "AppModel");
 
     // Load the main.qml file
     QQmlApplicationEngine engine;

app/qml.qrc

@@ -5,5 +5,6 @@
         <file>gui/PcView.qml</file>
         <file>gui/ic_tv_white_48px.svg</file>
         <file>gui/ic_add_to_queue_white_48px.svg</file>
+        <file>gui/AppView.qml</file>
     </qresource>
 </RCC>