added escape key handler (#461)

Added escape key handler for drawer2type

client/ui/controllers/pageController.cpp

@@ -77,7 +77,16 @@ void PageController::closeWindow()
 void PageController::keyPressEvent(Qt::Key key)
 {
     switch (key) {
-    case Qt::Key_Back: emit closePage();
+    case Qt::Key_Back:
+    case Qt::Key_Escape: {
+        if (m_drawerDepth) {
+            emit closeTopDrawer();
+            setDrawerDepth(getDrawerDepth() - 1);
+        } else {
+            emit escapePressed();
+        }
+        break;
+    }
     default: return;
     }
 }
@@ -132,3 +141,15 @@ void PageController::closeApplication()
 {
     qApp->quit();
 }
+
+void PageController::setDrawerDepth(const int depth)
+{
+    if (depth >= 0) {
+        m_drawerDepth = depth;
+    }
+}
+
+int PageController::getDrawerDepth()
+{
+    return m_drawerDepth;
+}

client/ui/controllers/pageController.h

@@ -87,6 +87,9 @@ public slots:
 
     void closeApplication();
 
+    void setDrawerDepth(const int depth);
+    int getDrawerDepth();
+
 signals:
     void goToPage(PageLoader::PageEnum page, bool slide = true);
     void goToStartPage();
@@ -105,7 +108,7 @@ signals:
     void showNotificationMessage(const QString &message);
 
     void showBusyIndicator(bool visible);
-    void enableTabBar(bool enabled);
+    void disableControls(bool disabled);
 
     void hideMainWindow();
     void raiseMainWindow();
@@ -113,12 +116,17 @@ signals:
     void showPassphraseRequestDrawer();
     void passphraseRequestDrawerClosed(QString passphrase);
 
+    void escapePressed();
+    void closeTopDrawer();
+
 private:
     QSharedPointer<ServersModel> m_serversModel;
 
     std::shared_ptr<Settings> m_settings;
 
     bool m_isTriggeredByConnectButton;
+
+    int m_drawerDepth;
 };
 
 #endif // PAGECONTROLLER_H