a very primitive dashboard

right now we have a single view, that gets brought to front and the wallpaper made translucent.
probably it will eventually need splitting the walppaper and the widgets in two separate views, but needs a more complex logic

src/shell/desktopview.cpp

@@ -81,6 +81,33 @@ void DesktopView::setFillScreen(bool fillScreen)
     emit fillScreenChanged();
 }
 
+void DesktopView::setDashboardShown(bool shown)
+{
+    if (shown) {
+        if (m_stayBehind) {
+            KWindowSystem::setType(winId(), NET::Normal);
+        }
+        raise();
+        KWindowSystem::raiseWindow(winId());
+        
+        QObject *wpGraphicObject = containment()->property("wallpaperGraphicsObject").value<QObject *>();
+        if (wpGraphicObject) {
+            wpGraphicObject->setProperty("opacity", 0.3);
+        }
+    } else {
+        if (m_stayBehind) {
+            KWindowSystem::setType(winId(), NET::Desktop);
+        }
+        lower();
+        KWindowSystem::lowerWindow(winId());
+
+        QObject *wpGraphicObject = containment()->property("wallpaperGraphicsObject").value<QObject *>();
+        if (wpGraphicObject) {
+            wpGraphicObject->setProperty("opacity", 1);
+        }
+    }
+}
+
 /*
 void DesktopView::showConfigurationInterface(Plasma::Applet *applet)
 {

src/shell/desktopview.h

@@ -42,6 +42,8 @@ public:
     bool fillScreen() const;
     void setFillScreen(bool fillScreen);
 
+    void setDashboardShown(bool shown);
+
 protected Q_SLOTS:
     /**
      * It will be called when the configuration is requested

src/shell/qmlpackages/desktop/contents/views/Desktop.qml

@@ -24,7 +24,7 @@ import org.kde.plasma.core 2.0 as PlasmaCore
 
 Rectangle {
     id: root
-    color: "black"
+    color: Qt.rgba(0, 0, 0, 0.2)
     width: 1024
     height: 768
 

src/shell/shellcorona.cpp

@@ -98,9 +98,10 @@ ShellCorona::ShellCorona(QObject *parent)
 
     QAction *dashboardAction = actions()->add<QAction>("show dashboard");
     QObject::connect(dashboardAction, &QAction::triggered,
-                     this, &ShellCorona::toggleDashboard);
+                     this, &ShellCorona::setDashboardShown);
     dashboardAction->setText(i18n("Show Dashboard"));
     dashboardAction->setAutoRepeat(true);
+    dashboardAction->setCheckable(true);
     dashboardAction->setIcon(QIcon::fromTheme("dashboard-show"));
     dashboardAction->setData(Plasma::Types::ControlAction);
     dashboardAction->setShortcut(QKeySequence("ctrl+f12"));
@@ -428,9 +429,18 @@ void ShellCorona::syncAppConfig()
     applicationConfig()->sync();
 }
 
-void ShellCorona::toggleDashboard()
+void ShellCorona::setDashboardShown(bool show)
 {
     qDebug() << "TODO: Toggling dashboard view";
+
+    QAction *dashboardAction = actions()->action("show dashboard");
+
+    if (dashboardAction) {
+        dashboardAction->setText(show ? i18n("Hide Dashboard") : i18n("Show Dashboard"));
+    }
+    foreach (DesktopView *view, d->views) {
+        view->setDashboardShown(show);
+    }
 }
 
 void ShellCorona::printScriptError(const QString &error)

src/shell/shellcorona.h

@@ -120,7 +120,7 @@ private Q_SLOTS:
     void handleContainmentAdded(Plasma::Containment *c);
     void showWidgetExplorer();
     void syncAppConfig();
-    void toggleDashboard();
+    void setDashboardShown(bool show);
 
 private:
     class Private;