show configuration windows only for one view

-- for each layout only one dock should show its configuration windows
otherwise we could reach a point that because a settings window
is below another Latte View its options are not reachable

app/layout/layout.h

@@ -27,6 +27,7 @@
 // Qt
 #include <QObject>
 #include <QPointer>
+#include <QQuickView>
 #include <QScreen>
 
 // KDE
@@ -205,6 +206,9 @@ signals:
     void preferredViewForShortcutsChanged(Latte::View *view);
     void preferredForShortcutsTouchedChanged();
 
+    //! used from ConfigView(s) in order to be informed which is one should be shown
+    void configViewCreated(QQuickView *configView);
+
 private slots:
     void loadConfig();
     void saveConfig();

app/view/settings/primaryconfigview.cpp

@@ -26,6 +26,7 @@
 #include "../view.h"
 #include "../../lattecorona.h"
 #include "../../layoutmanager.h"
+#include "../../layout/layout.h"
 #include "../../settings/universalsettings.h"
 #include "../../shortcuts/globalshortcuts.h"
 #include "../../shortcuts/shortcutstracker.h"
@@ -94,6 +95,10 @@ PrimaryConfigView::PrimaryConfigView(Plasma::Containment *containment, Latte::Vi
     if (m_corona) {
         connections << connect(m_corona, &Latte::Corona::raiseViewsTemporaryChanged, this, &PrimaryConfigView::raiseDocksTemporaryChanged);
     }
+
+    if (m_latteView->managedLayout()) {
+        emit m_latteView->managedLayout()->configViewCreated(this);
+    }
 }
 
 PrimaryConfigView::~PrimaryConfigView()

app/view/view.cpp

@@ -758,12 +758,13 @@ void View::setManagedLayout(Layout *layout)
         });
 
         connectionsManagedLayout[0] = connect(m_managedLayout, &Layout::preferredViewForShortcutsChanged, this, &View::preferredViewForShortcutsChangedSlot);
+        connectionsManagedLayout[1] = connect(m_managedLayout, &Latte::Layout::configViewCreated, this, &View::configViewCreated);
     }
 
     Latte::Corona *latteCorona = qobject_cast<Latte::Corona *>(this->corona());
 
     if (latteCorona->layoutManager()->memoryUsage() == Types::MultipleLayouts) {
-        connectionsManagedLayout[1] = connect(latteCorona->activitiesConsumer(), &KActivities::Consumer::runningActivitiesChanged, this, [&]() {
+        connectionsManagedLayout[2] = connect(latteCorona->activitiesConsumer(), &KActivities::Consumer::runningActivitiesChanged, this, [&]() {
             if (m_managedLayout && m_visibility) {
                 qDebug() << "DOCK VIEW FROM LAYOUT (runningActivitiesChanged) ::: " << m_managedLayout->name()
                          << " - activities: " << m_managedLayout->appliedActivities();
@@ -772,14 +773,14 @@ void View::setManagedLayout(Layout *layout)
             }
         });
 
-        connectionsManagedLayout[2] = connect(m_managedLayout, &Layout::activitiesChanged, this, [&]() {
+        connectionsManagedLayout[3] = connect(m_managedLayout, &Layout::activitiesChanged, this, [&]() {
             if (m_managedLayout) {
                 applyActivitiesToWindows();
                 emit activitiesChanged();
             }
         });
 
-        connectionsManagedLayout[3] = connect(latteCorona->layoutManager(), &LayoutManager::layoutsChanged, this, [&]() {
+        connectionsManagedLayout[4] = connect(latteCorona->layoutManager(), &LayoutManager::layoutsChanged, this, [&]() {
             if (m_managedLayout) {
                 applyActivitiesToWindows();
                 emit activitiesChanged();
@@ -788,7 +789,7 @@ void View::setManagedLayout(Layout *layout)
 
         //!IMPORTANT!!! ::: This fixes a bug when closing an Activity all docks from all Activities are
         //! disappearing! With this they reappear!!!
-        connectionsManagedLayout[4] = connect(this, &QWindow::visibleChanged, this, [&]() {
+        connectionsManagedLayout[5] = connect(this, &QWindow::visibleChanged, this, [&]() {
             if (!isVisible() && m_managedLayout) {
                 QTimer::singleShot(100, [this]() {
                     if (m_managedLayout && containment() && !containment()->destroyed()) {
@@ -850,6 +851,16 @@ void View::setBlockHiding(bool block)
     }
 }
 
+void View::configViewCreated(QQuickView *configView)
+{
+    if (m_configView && m_configView!=configView) {
+        //! for each layout only one dock should show its configuration windows
+        //! otherwise we could reach a point that because a settings window
+        //! is below another Latte View its options are not reachable
+        m_configView->deleteLater();
+    }
+}
+
 void View::hideWindowsForSlidingOut()
 {
     setBlockHiding(false);

app/view/view.h

@@ -257,6 +257,7 @@ signals:
 
 private slots:
     void availableScreenRectChanged();
+    void configViewCreated(QQuickView *configView);
     void hideWindowsForSlidingOut();
     void preferredViewForShortcutsChangedSlot(Latte::View *view);
     void statusChanged(Plasma::Types::ItemStatus);
@@ -304,7 +305,7 @@ private:
     QPointer<ViewPart::WindowsTracker> m_windowsTracker;
 
     //! Connections to release and bound for the managed layout
-    std::array<QMetaObject::Connection, 5> connectionsManagedLayout;
+    std::array<QMetaObject::Connection, 6> connectionsManagedLayout;
 
     KWayland::Client::PlasmaShellSurface *m_shellSurface{nullptr};
 };