added backnavigation and qrc

LenaPi/models/NavigationItemModel.cpp

@@ -3,9 +3,10 @@
 #include <QDir>
 #include <QFile>
 
-NavigationItemModel::NavigationItemModel(QObject *parent) : QObject(parent)
+NavigationItemModel::NavigationItemModel(QObject *parent) : QObject(parent),
+    mImageSource("qrc:/default_image"),
+    mParentItem(qobject_cast<NavigationItemModel*>(parent))
 {
-    ///@todo init imageSource with defaul image from qrc
 }
 
 QString NavigationItemModel::getImageSource() const
@@ -57,7 +58,7 @@ void NavigationItemModel::setCircleDelegate(bool value)
 
 bool NavigationItemModel::isRoot() const
 {
-    return mParentItem;
+    return !mParentItem;
 }
 
 NavigationItemModel *NavigationItemModel::getParentItem()
@@ -75,6 +76,16 @@ QList<NavigationItemModel *> NavigationItemModel::getChildren()
     return mChildren;
 }
 
+QList<NavigationItemModel *> NavigationItemModel::getSiblings()
+{
+    if(isRoot()){
+        return QList<NavigationItemModel*>();
+    } else{
+        return mParentItem->getChildren();
+    }
+
+}
+
 void NavigationItemModel::appendChild(NavigationItemModel *item)
 {
     item->setParent(this);

LenaPi/models/NavigationItemModel.h

@@ -32,6 +32,8 @@ public:
     bool hasChildren() const;
     QList<NavigationItemModel *> getChildren();
 
+    QList<NavigationItemModel *> getSiblings();
+
     void appendChild(NavigationItemModel* item);
     void clearChildren();
 
@@ -43,7 +45,7 @@ private:
     bool mIsCircleDelegate = false;
 
     QList<NavigationItemModel*> mChildren = QList<NavigationItemModel*>();
-    NavigationItemModel* mParentItem = nullptr;
+    NavigationItemModel* mParentItem;
 };
 
 #endif // NAVIGATIONITEMMODEL_H

LenaPi/models/NavigationListModel.cpp

@@ -18,5 +18,27 @@ void NavigationListModel::setModelItems(QList<NavigationItemModel *> list)
     for(const auto& item : list){
         mItems.append(item);
     }
+
+    if(mItems.isEmpty()){
+        mIsBackVisible = false;
+    } else{
+        mIsBackVisible = !list.at(0)->getParentItem()->isRoot();
+    }
+
     emit modelItemsChanged();
 }
+
+bool NavigationListModel::isBackVisible()
+{
+    return mIsBackVisible;
+}
+
+void NavigationListModel::navigateBack()
+{
+    if(!mIsBackVisible || mItems.isEmpty()) return;
+
+    auto item = qobject_cast<NavigationItemModel*>(mItems.at(0));
+    if(!item || item->getParentItem()->isRoot()) return;
+
+    setModelItems(item->getParentItem()->getSiblings());
+}

LenaPi/models/NavigationListModel.h

@@ -9,6 +9,7 @@ class NavigationListModel : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(QList<QObject*> pModelItems READ getModelItems NOTIFY modelItemsChanged)
+    Q_PROPERTY(bool pIsBackVisible READ isBackVisible NOTIFY modelItemsChanged)
 
 signals:
     void modelItemsChanged();
@@ -19,8 +20,13 @@ public:
     QList<QObject*> getModelItems();
     void setModelItems(QList<NavigationItemModel*> list);
 
+    bool isBackVisible();
+
+    Q_INVOKABLE void navigateBack();
+
 private:
     QList<QObject*> mItems;
+    bool mIsBackVisible = false;
 };
 
 #endif // NAVIGATIONLISTMODEL_H