feat: implement real-time trash file count monitoring

1. Replace static trash tip text with dynamic file count property
2. Add QFileSystemWatcher to monitor trash directory changes
3. Create setupTrashWatcher method to initialize directory monitoring
4. Define TRASH_FILES_PATH constant for consistent trash path usage
5. Add trashFilesCountChanged signal to notify UI of updates
6. Ensure trash directory exists before setting up watcher

feat: 实现实时回收站文件数量监控

1. 将静态回收站提示文本替换为动态文件计数属性
2. 添加 QFileSystemWatcher 监控回收站目录变化
3. 创建 setupTrashWatcher 方法初始化目录监控
4. 定义 TRASH_FILES_PATH 常量确保回收站路径一致性
5. 添加 trashFilesCountChanged 信号通知 UI 更新
6. 在设置监控器前确保回收站目录存在

PMS: BUG-336825

Author: wjyrich

panels/dock/taskmanager/package/AppItem.qml

@@ -369,7 +369,7 @@ Item {
 
         PanelToolTip {
             id: toolTip
-            text: root.itemId === "dde-trash" ? root.name + "-" + taskmanager.Applet.getTrashTipText() : root.name
+            text: root.itemId === "dde-trash" ? root.name + "-" + taskmanager.Applet.trashFilesCount : root.name
             toolTipX: DockPanelPositioner.x
             toolTipY: DockPanelPositioner.y
         }

panels/dock/taskmanager/taskmanager.cpp

@@ -38,6 +38,7 @@
 Q_LOGGING_CATEGORY(taskManagerLog, "dde.shell.dock.taskmanager", QtDebugMsg)
 
 #define Settings TaskManagerSettings::instance()
+#define TRASH_FILES_PATH (QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/Trash/files")
 
 #define DESKTOPFILEFACTORY DesktopfileParserFactory<    \
                             DesktopFileAMParser,        \
@@ -76,9 +77,11 @@ TaskManager::TaskManager(QObject *parent)
     : DContainment(parent)
     , AbstractTaskManagerInterface(nullptr)
     , m_windowFullscreen(false)
+    , m_trashWatcher(nullptr)
 {
     connect(Settings, &TaskManagerSettings::allowedForceQuitChanged, this, &TaskManager::allowedForceQuitChanged);
     connect(Settings, &TaskManagerSettings::windowSplitChanged, this, &TaskManager::windowSplitChanged);
+    setupTrashWatcher();
 }
 
 bool TaskManager::load()
@@ -427,11 +430,10 @@ void TaskManager::saveDockElementsOrder(const QStringList &appIds)
     TaskManagerSettings::instance()->setDockedElements(newDockedElements);
 }
 
-QString TaskManager::getTrashTipText()
+QString TaskManager::trashFilesCount()
 {
     int fileCount = 0;
-    QString trashPath = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/Trash/files";
-    QDir trashDir(trashPath);
+    QDir trashDir(TRASH_FILES_PATH);
 
     if (trashDir.exists()) {
         QStringList entries = trashDir.entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);
@@ -455,6 +457,19 @@ void TaskManager::modifyOpacityChanged()
     }
 }
 
+void TaskManager::setupTrashWatcher()
+{
+    QDir trashDir(TRASH_FILES_PATH);
+    
+    if (!trashDir.exists()) {
+        trashDir.mkpath(TRASH_FILES_PATH);
+    }
+    m_trashWatcher = new QFileSystemWatcher(this);
+    m_trashWatcher->addPath(TRASH_FILES_PATH);
+    connect(m_trashWatcher, &QFileSystemWatcher::directoryChanged, 
+            this, &TaskManager::trashFilesCountChanged);
+}
+
 D_APPLET_CLASS(TaskManager)
 }
 

panels/dock/taskmanager/taskmanager.h

@@ -13,6 +13,7 @@
 #include "hoverpreviewproxymodel.h"
 
 #include <QPointer>
+#include <QFileSystemWatcher>
 
 namespace dock {
 class AppItem;
@@ -25,6 +26,7 @@ class TaskManager : public DS_NAMESPACE::DContainment, public AbstractTaskManage
     Q_PROPERTY(bool windowSplit READ windowSplit NOTIFY windowSplitChanged)
     Q_PROPERTY(bool windowFullscreen READ windowFullscreen NOTIFY windowFullscreenChanged)
     Q_PROPERTY(bool allowForceQuit READ allowForceQuit NOTIFY allowedForceQuitChanged)
+    Q_PROPERTY(QString trashFilesCount READ trashFilesCount NOTIFY trashFilesCountChanged)
 
 public:
     enum Roles {
@@ -95,16 +97,18 @@ class TaskManager : public DS_NAMESPACE::DContainment, public AbstractTaskManage
 
     Q_INVOKABLE void activateWindow(uint32_t windowID);
     Q_INVOKABLE void saveDockElementsOrder(const QStringList &appIds);
-    Q_INVOKABLE QString getTrashTipText();
+    Q_INVOKABLE QString trashFilesCount();
 
 private:
     void moveFilesToTrash(const QStringList& urls);
+    void setupTrashWatcher();
 
 Q_SIGNALS:
     void dataModelChanged();
     void windowSplitChanged();
     void windowFullscreenChanged(bool);
     void allowedForceQuitChanged();
+    void trashFilesCountChanged();
 
 private Q_SLOTS:
     void handleWindowAdded(QPointer<AbstractWindow> window);
@@ -117,6 +121,7 @@ private Q_SLOTS:
     DockGlobalElementModel *m_dockGlobalElementModel = nullptr;
     DockItemModel *m_itemModel = nullptr;
     HoverPreviewProxyModel *m_hoverPreviewModel = nullptr;
+    QFileSystemWatcher *m_trashWatcher = nullptr;
 };
 
 }