fix #1005,add timer to fix freeze

--make less intrusive the repositioning
of the screen edge ghost windows

app/dock/screenedgeghostwindow.cpp

@@ -24,6 +24,7 @@
 #include <QDebug>
 #include <QSurfaceFormat>
 #include <QQuickView>
+#include <QTimer>
 
 #include <KWayland/Client/plasmashell.h>
 #include <KWayland/Client/surface.h>
@@ -45,16 +46,21 @@ ScreenEdgeGhostWindow::ScreenEdgeGhostWindow(DockView *view) :
              | Qt::NoDropShadowWindowHint
              | Qt::WindowDoesNotAcceptFocus);
 
-    connect(this, &QQuickView::xChanged, this, &ScreenEdgeGhostWindow::fixGeometry);
+    m_fixGeometryTimer.setSingleShot(true);
-    connect(this, &QQuickView::yChanged, this, &ScreenEdgeGhostWindow::fixGeometry);
+    m_fixGeometryTimer.setInterval(500);
-    connect(this, &QQuickView::widthChanged, this, &ScreenEdgeGhostWindow::fixGeometry);
+    connect(&m_fixGeometryTimer, &QTimer::timeout, this, &ScreenEdgeGhostWindow::fixGeometry);
-    connect(this, &QQuickView::heightChanged, this, &ScreenEdgeGhostWindow::fixGeometry);
+
+    connect(this, &QQuickView::xChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
+    connect(this, &QQuickView::yChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
+    connect(this, &QQuickView::widthChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
+    connect(this, &QQuickView::heightChanged, this, &ScreenEdgeGhostWindow::startGeometryTimer);
 
     connect(m_dockView, &DockView::absGeometryChanged, this, &ScreenEdgeGhostWindow::updateGeometry);
     connect(m_dockView, &DockView::screenGeometryChanged, this, &ScreenEdgeGhostWindow::updateGeometry);
     connect(m_dockView, &DockView::locationChanged, this, &ScreenEdgeGhostWindow::updateGeometry);
     connect(m_dockView, &QQuickView::screenChanged, this, [this]() {
         setScreen(m_dockView->screen());
+        updateGeometry();
     });
 
 
@@ -169,6 +175,11 @@ void ScreenEdgeGhostWindow::fixGeometry()
     }
 }
 
+void ScreenEdgeGhostWindow::startGeometryTimer()
+{
+    m_fixGeometryTimer.start();
+}
+
 void ScreenEdgeGhostWindow::setupWaylandIntegration()
 {
     if (m_shellSurface || !KWindowSystem::isPlatformWayland() || !m_dockView || !m_dockView->containment()) {

app/dock/screenedgeghostwindow.h

@@ -22,6 +22,7 @@
 
 #include <QObject>
 #include <QQuickView>
+#include <QTimer>
 
 namespace KWayland {
 namespace Client {
@@ -75,6 +76,7 @@ protected:
     bool event(QEvent *ev) override;
 
 private slots:
+    void startGeometryTimer();
     void updateGeometry();
     void fixGeometry();
 
@@ -85,6 +87,8 @@ private:
     bool m_inDelete{false};
     QRect m_calculatedGeometry;
 
+    QTimer m_fixGeometryTimer;
+
     DockView *m_dockView{nullptr};
 
     KWayland::Client::PlasmaShellSurface *m_shellSurface{nullptr};