feat+refactor: clean up ProgressWidget and add progress indicatior to

mod downloader

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/widgets/ProgressWidget.h

@@ -9,24 +9,48 @@ class Task;
 class QProgressBar;
 class QLabel;
 
-class ProgressWidget : public QWidget
-{
+class ProgressWidget : public QWidget {
     Q_OBJECT
-public:
-    explicit ProgressWidget(QWidget *parent = nullptr);
+   public:
+    explicit ProgressWidget(QWidget* parent = nullptr, bool show_label = true);
 
-public slots:
-    void start(std::shared_ptr<Task> task);
+    /** Whether to hide the widget automatically if it's watching no running task. */
+    void hideIfInactive(bool hide) { m_hide_if_inactive = hide; }
+
+    /** Reset the displayed progress to 0 */
+    void reset();
+
+    /** The text that shows up in the middle of the progress bar.
+     *  By default it's '%p%', with '%p' being the total progress in percentage.
+     */
+    void progressFormat(QString);
+
+   public slots:
+    /** Watch the progress of a task. */
+    void watch(Task* task);
+
+    /** Watch the progress of a task, and start it if needed */
+    void start(Task* task);
+
+    /** Blocking way of waiting for a task to finish. */
     bool exec(std::shared_ptr<Task> task);
 
-private slots:
+    /** Un-hide the widget if needed. */
+    void show();
+
+    /** Make the widget invisible. */
+    void hide();
+
+   private slots:
     void handleTaskFinish();
-    void handleTaskStatus(const QString &status);
+    void handleTaskStatus(const QString& status);
     void handleTaskProgress(qint64 current, qint64 total);
     void taskDestroyed();
 
-private:
-    QLabel *m_label;
-    QProgressBar *m_bar;
-    std::shared_ptr<Task> m_task;
+   private:
+    QLabel* m_label = nullptr;
+    QProgressBar* m_bar = nullptr;
+    Task* m_task = nullptr;
+
+    bool m_hide_if_inactive = false;
 };