fix(taskManager):解决初次加载图标重叠和icon报错问题

widgets/ukui-task-manager/plugin/qml/main.qml

@@ -145,10 +145,4 @@ WidgetItem {
             }
         }
     }
-    Component.onCompleted: {
-        // init
-        if (Widget.globalConfig.mergeIcons === undefined) {
-            Widget.globalConfig.mergeIcons = 0;
-        }
-    }
 }

widgets/ukui-task-manager/qml/TaskManager.qml

@@ -102,13 +102,14 @@ DropArea {
             property bool useSingleItem: taskItemView.isMergeStatus || (CurrentWinIdList ? CurrentWinIdList.length < 1 : true)
             //非合并状态下激活预览图时 对应的winId
             property var singleWinId: []
+            property bool iconNeedsUpdate: true
 
             width: taskItemView.isHorizontal ? taskItemLoader.width : taskItemView.width
             height: taskItemView.isHorizontal ? taskItemView.height : taskItemLoader.height
             visible: DelegateModel.inItems || !isDragStatus
 
             onIconChanged: {
-                generateDragImage();
+                iconNeedsUpdate = true;
             }
 
             function generateDragImage() {
@@ -195,7 +196,12 @@ DropArea {
                 }
 
                 // 为拖拽截图
-                // onPressed: parent.generateDragImage();
+                onPressed:  {
+                    if (iconNeedsUpdate) {
+                        parent.generateDragImage();
+                        iconNeedsUpdate = false;
+                    }
+                }
                 drag.target: mouseArea
                 drag.onActiveChanged: {
                     taskItemListRoot.requestThumbnailView(false, null);
@@ -400,7 +406,11 @@ DropArea {
         // contentWidth: childrenRect.width
         // width: childrenRect.width
         // height: parent.height
-        property bool isMergeStatus: (Widget.globalConfig.mergeIcons === 0)
+
+        property bool isMergeStatus: {
+            var status = Widget.globalConfig.mergeIcons;
+            return (status === undefined) || (status === 0) ;
+        }
         property bool isHorizontal: orientation === ListView.Horizontal
         property real taskItemSize: isHorizontal ? taskItemView.height : taskItemView.width
         clip: true
@@ -426,6 +436,19 @@ DropArea {
             updateIconGeometryTimer.restart();
         }
 
+        function updateIconState() {
+            for (let i = 0; i < taskItemDelegateModel.count; ++i) {
+                taskItemView.itemAtIndex(i).iconNeedsUpdate = true;
+            }
+        }
+
+        Component.onCompleted: {
+            Platform.Theme.iconThemeChanged.connect(updateIconState);
+            if (Widget.globalConfig.mergeIcons === undefined) {
+                Widget.globalConfig.mergeIcons = 0;
+            }
+        }
+
         Timer {
             id: updateIconGeometryTimer
             interval: 500