improve adding applets through dragging responsive

--fix all events identifications from DragMove and
DragExit etc. in containment::qml part and all drags
flags are calculated only at DragEnter! This fixes
the DragMove signaling and all DragMove signals are
sent correctly.
It needs to be fixed also for Tasks plasmoid because
every time the mouse hovers the Tasks Plasmoid then
the DragMove signals are NOT SENT as they should.

app/view/view.cpp

@@ -1084,7 +1084,9 @@ bool View::event(QEvent *e)
                 emit mouseReleased(mouseEvent->pos(), mouseEvent->button());
             }
             break;
-
+       /* case QEvent::DragMove:
+            qDebug() << "DRAG MOVING>>>>>>";
+            break;*/
         case QEvent::PlatformSurface:
             if (auto pe = dynamic_cast<QPlatformSurfaceEvent *>(e)) {
                 switch (pe->surfaceEventType()) {

containment/package/contents/ui/main.qml

@@ -100,6 +100,11 @@ DragDrop.DropArea {
     property bool blurEnabled: plasmoid.configuration.blurEnabled && (!forceTransparentPanel || forcePanelForBusyBackground)
 
     property bool confirmedDragEntered: false
+    property bool dragIsTask: false
+    property bool dragIsSeparator: false
+    property bool dragIsLatteTasks: false
+    property bool dragOnlyLaunchers: false
+
     property bool containsOnlyPlasmaTasks: false //this is flag to indicate when from tasks only a plasma based one is found
     property bool dockContainsMouse: latteView && latteView.visibility ? latteView.visibility.containsMouse : false
 
@@ -661,26 +666,39 @@ DragDrop.DropArea {
     }
 
     onDragEnter: {
-        if (plasmoid.immutable || dockIsHidden || visibilityManager.inSlidingIn || visibilityManager.inSlidingOut) {
+        var isTask = event !== undefined
-            event.ignore();
+                && event.mimeData !== undefined
-            return;
+                && event.mimeData.formats !== undefined
-        }
+                && event.mimeData.formats.indexOf("application/x-orgkdeplasmataskmanager_taskbuttonitem") >= 0;
+
+        var isSeparator = event !== undefined
+                && event.mimeData !== undefined
+                && ( latteView.mimeContainsPlasmoid(event.mimeData, "audoban.applet.separator")
+                    || latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.separator") );
+
+        var isLatteTasks = event !== undefined
+                && event.mimeData !== undefined
+                && latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.plasmoid");
 
-        if (event.mimeData.formats.indexOf("application/x-orgkdeplasmataskmanager_taskbuttonitem") >= 0) {
+        dragIsTask = isTask;
+        dragIsSeparator = isSeparator;
+        dragIsLatteTasks = isLatteTasks;
+
+        if (dragIsTask || plasmoid.immutable || dockIsHidden || visibilityManager.inSlidingIn || visibilityManager.inSlidingOut) {
+            event.ignore();
             return;
         }
 
         if (latteApplet) {
-            if (latteApplet.launchersDrop(event)) {
+            dragOnlyLaunchers = latteApplet.launchersDrop(event);
+
+            if (dragOnlyLaunchers) {
                 root.addLaunchersMessage = true;
                 if (root.addLaunchersInTaskManager) {
                     return;
                 }
             } else {
-                var isSeparator = ( latteView.mimeContainsPlasmoid(event.mimeData, "audoban.applet.separator")
+                if (dragIsSeparator && root.latteAppletContainer.containsPos(event)) {
-                                   || latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.separator") );
-
-                if (isSeparator && root.latteAppletContainer.containsPos(event)) {
                     confirmedDragEntered = true
                     dndSpacer.opacity = 0;
                     dndSpacer.parent = root;
@@ -694,29 +712,25 @@ DragDrop.DropArea {
             slotAnimationsNeedLength(1);
         }
 
-        if (!latteApplet || (latteApplet && !latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.plasmoid"))) {
+        if (!latteApplet || (latteApplet && !dragIsLatteTasks)) {
             LayoutManager.insertAtCoordinates2(dndSpacer, event.x, event.y)
             dndSpacer.opacity = 1;
         }
     }
 
     onDragMove: {
-        if (event.mimeData.formats.indexOf("application/x-orgkdeplasmataskmanager_taskbuttonitem") >= 0
+        if (dragIsTask) {
-                || dockIsHidden || visibilityManager.inSlidingIn || visibilityManager.inSlidingOut) {
             return;
         }
 
         if (latteApplet) {
-            if (latteApplet.launchersDrop(event)) {
+            if (dragOnlyLaunchers) {
                 root.addLaunchersMessage = true;
                 if (root.addLaunchersInTaskManager) {
                     return;
                 }
             } else {
-                var isSeparator = ( latteView.mimeContainsPlasmoid(event.mimeData, "audoban.applet.separator")
+                if (dragIsSeparator && root.latteAppletContainer.containsPos(event)) {
-                                   || latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.separator") );
-
-                if (isSeparator && root.latteAppletContainer.containsPos(event)) {
                     confirmedDragEntered = true
                     dndSpacer.opacity = 0;
                     dndSpacer.parent = root;
@@ -725,13 +739,17 @@ DragDrop.DropArea {
             }
         }
 
-        if (!latteApplet || (latteApplet && !latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.plasmoid"))) {
+        if (!latteApplet || (latteApplet && !dragIsLatteTasks)) {
             LayoutManager.insertAtCoordinates2(dndSpacer, event.x, event.y)
             dndSpacer.opacity = 1;
         }
     }
 
     onDragLeave: {
+        dragIsTask = false;
+        dragIsSeparator = false;
+        dragIsLatteTasks = false;
+        dragOnlyLaunchers = false;
 
         if (confirmedDragEntered) {
             slotAnimationsNeedLength(-1);
@@ -744,17 +762,15 @@ DragDrop.DropArea {
     }
 
     onDrop: {
-        if (dockIsHidden || visibilityManager.inSlidingIn || visibilityManager.inSlidingOut) {
+        if (dragIsTask || dockIsHidden || visibilityManager.inSlidingIn || visibilityManager.inSlidingOut) {
             return;
         }
 
-        if (event.mimeData.formats.indexOf("application/x-orgkdeplasmataskmanager_taskbuttonitem") < 0) {
+        if (latteApplet && dragOnlyLaunchers && root.addLaunchersInTaskManager) {
-            if (latteApplet && latteApplet.launchersDrop(event) && root.addLaunchersInTaskManager) {
+            latteApplet.launchersDropped(event.mimeData.urls);
-                latteApplet.launchersDropped(event.mimeData.urls);
+        } else if (!latteApplet || (latteApplet && !dragIsLatteTasks)) {
-            } else if (!latteApplet || (latteApplet && !latteView.mimeContainsPlasmoid(event.mimeData, "org.kde.latte.plasmoid"))) {
+            plasmoid.processMimeData(event.mimeData, event.x, event.y);
-                plasmoid.processMimeData(event.mimeData, event.x, event.y);
+            event.accept(event.proposedAction);
-                event.accept(event.proposedAction);
-            }
         }
 
         if (confirmedDragEntered) {