fix #176,dont hide tooltip when hovering same task

plasmoid/contents/ui/TaskDelegate.qml

@@ -1036,8 +1036,8 @@ MouseArea{
             repeat: false
 
             onTriggered: {
-                if(mainItemContainer.containsMouse){
-                    //     console.log("Hovered Timer....");
+                if(mainItemContainer.containsMouse && toolTipDelegate.parentTask !== mainItemContainer){
+                    //console.log("Hovered Timer....");
                     mainItemContainer.preparePreviewWindow(false);
                     windowsPreviewDlg.show();
                     //windowsPreviewDlg.visible = true;

plasmoid/contents/ui/main.qml

@@ -220,31 +220,38 @@ Item {
                 //it is used to unblock dock hiding
                 root.signalDraggingState(false);
             }
+            //console.log("on hide event called...");
             visible = false;
-            //activeItem = null;
+            activeItem = null;
+
             initializePreviewComponent.createObject(windowsPreviewDlg);
         }
 
         function show(){
-            //used to initialize windows previews buffers
-            visible = false;
-            var tasks = icList.contentItem.children;
+            //console.log("preview show called...");
+            if (activeItem !== toolTipDelegate.parentTask) {
+                //used to initialize windows previews buffers
+                visible = false;
+
+                var tasks = icList.contentItem.children;
+
+                for(var i=0; i<tasks.length; ++i){
+                    var task = tasks[i];
 
-            for(var i=0; i<tasks.length; ++i){
-                var task = tasks[i];
+                    if(task && task.isActive){
+                        activeItem = task;
+                        break;
+                    }
+                }
 
-                if(task && task.isActive){
-                    activeItem = task;
-                    break;
+                if (latteDock) {
+                    //it is used to block dock hiding
+                    root.signalDraggingState(true);
                 }
-            }
 
-            if (latteDock) {
-                //it is used to block dock hiding
-                root.signalDraggingState(true);
+                activeItem = toolTipDelegate.parentTask;
+                visible = true;
             }
-
-            visible = true;
         }
     }