support dialogs/background for dock settings wins

--use a different shadows manager for dialogs such as
dock settings window through the Latte::Corona class.
The new shadow manager is responsible to draw
"dialogs/background" shadows for windows instead of
the PanelShadows original class which is responsible
to draw "widgets/background" shadows

app/lattecorona.cpp

@@ -96,7 +96,8 @@ Corona::Corona(bool defaultLayoutOnStartup, QString layoutNameOnStartUp, int use
       m_globalShortcuts(new GlobalShortcuts(this)),
       m_plasmaScreenPool(new PlasmaExtended::ScreenPool(this)),
       m_themeExtended(new PlasmaExtended::Theme(KSharedConfig::openConfig(), this)),
-      m_layoutsManager(new Layouts::Manager(this))
+      m_layoutsManager(new Layouts::Manager(this)),
+      m_dialogShadows(new PanelShadows(this, QStringLiteral("dialogs/background")))
 {
     //! create the window manager
 
@@ -184,6 +185,7 @@ Corona::~Corona()
     m_layoutsManager->unload();
 
     m_wm->deleteLater();
+    m_dialogShadows->deleteLater();
     m_globalShortcuts->deleteLater();
     m_layoutsManager->deleteLater();
     m_screenPool->deleteLater();
@@ -403,6 +405,11 @@ KActivities::Consumer *Corona::activitiesConsumer() const
     return m_activityConsumer;
 }
 
+PanelShadows *Corona::dialogShadows() const
+{
+    return m_dialogShadows;
+}
+
 GlobalShortcuts *Corona::globalShortcuts() const
 {
     return m_globalShortcuts;

app/lattecorona.h

@@ -24,6 +24,7 @@
 // local
 #include "plasma/quick/configview.h"
 #include "layout/storage.h"
+#include "view/panelshadows_p.h"
 #include "../liblatte2/types.h"
 
 // Qt
@@ -137,6 +138,8 @@ public:
 
     WindowSystem::AbstractWindowInterface *wm() const;
 
+    PanelShadows *dialogShadows() const;
+
     //! these functions are used from context menu through containmentactions
     void switchToLayout(QString layout);
     void showSettingsWindow(int page);
@@ -219,6 +222,8 @@ private:
 
     WindowSystem::AbstractWindowInterface *m_wm{nullptr};
 
+    PanelShadows *m_dialogShadows{nullptr};
+
     KWayland::Client::PlasmaShell *m_waylandCorona{nullptr};
 
     friend class GlobalShortcuts;

app/view/settings/primaryconfigview.cpp

@@ -130,6 +130,8 @@ PrimaryConfigView::~PrimaryConfigView()
 {
     qDebug() << "ConfigView deleting ...";
 
+    m_corona->dialogShadows()->removeWindow(this);
+
     m_corona->wm()->unregisterIgnoredWindow(KWindowSystem::isPlatformX11() ? winId() : m_waylandWindowId);
 
     deleteSecondaryWindow();
@@ -149,7 +151,7 @@ void PrimaryConfigView::init()
 
     setDefaultAlphaBuffer(true);
     setColor(Qt::transparent);
-    PanelShadows::self()->addWindow(this);
+    m_corona->dialogShadows()->addWindow(this);
     rootContext()->setContextProperty(QStringLiteral("latteView"), m_latteView);
     rootContext()->setContextProperty(QStringLiteral("shortcutsEngine"), m_corona->globalShortcuts()->shortcutsTracker());
     rootContext()->setContextProperty(QStringLiteral("viewConfig"), this);
@@ -692,7 +694,7 @@ void PrimaryConfigView::updateEnabledBorders()
     if (m_enabledBorders != borders) {
         m_enabledBorders = borders;
 
-        PanelShadows::self()->addWindow(this, m_enabledBorders);
+        m_corona->dialogShadows()->addWindow(this, m_enabledBorders);
 
         emit enabledBordersChanged();
     }

app/view/settings/secondaryconfigview.cpp

@@ -112,6 +112,8 @@ SecondaryConfigView::~SecondaryConfigView()
 {
     qDebug() << "SecDockConfigView deleting ...";
 
+    m_corona->dialogShadows()->removeWindow(this);
+
     m_corona->wm()->unregisterIgnoredWindow(KWindowSystem::isPlatformX11() ? winId() : m_waylandWindowId);
 
     for (const auto &var : connections) {
@@ -125,7 +127,7 @@ void SecondaryConfigView::init()
 
     setDefaultAlphaBuffer(true);
     setColor(Qt::transparent);
-    PanelShadows::self()->addWindow(this);
+    m_corona->dialogShadows()->addWindow(this);
     rootContext()->setContextProperty(QStringLiteral("latteView"), m_latteView);
     rootContext()->setContextProperty(QStringLiteral("viewConfig"), this);
     rootContext()->setContextProperty(QStringLiteral("plasmoid"), m_latteView->containment()->property("_plasma_graphicObject").value<QObject *>());
@@ -438,7 +440,7 @@ void SecondaryConfigView::updateEnabledBorders()
     if (m_enabledBorders != borders) {
         m_enabledBorders = borders;
 
-        PanelShadows::self()->addWindow(this, m_enabledBorders);
+        m_corona->dialogShadows()->addWindow(this, m_enabledBorders);
 
         emit enabledBordersChanged();
     }

shell/package/contents/configuration/LatteDockConfiguration.qml

@@ -125,7 +125,7 @@ FocusScope {
 
     PlasmaCore.FrameSvgItem{
         anchors.fill: parent
-        imagePath: "widgets/panel-background"
+        imagePath: "dialogs/background"
         enabledBorders: viewConfig.enabledBorders
     }
 

shell/package/contents/configuration/LatteDockSecondaryConfiguration.qml

@@ -51,7 +51,7 @@ FocusScope {
 
     PlasmaCore.FrameSvgItem{
         anchors.fill: parent
-        imagePath: "widgets/panel-background"
+        imagePath: "dialogs/background"
         enabledBorders: viewConfig.enabledBorders
     }