fun：添加Loading窗口。

Gui/Form/Loading.h

@@ -0,0 +1,45 @@
+#ifndef LOADINGDIALOG_H
+#define LOADINGDIALOG_H
+
+#include <QDialog>
+#include <QGraphicsDropShadowEffect>
+#include <QLabel>
+#include <QMovie>
+#include <QPainter>
+#include <QPushButton>
+#define USER_CANCEL -1
+
+// LoadingDialog 改造来源：https://blog.csdn.net/weixin_42105886/article/details/114665272
+class LoadingDialog : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit LoadingDialog(QWidget* parent = nullptr);
+    ~LoadingDialog();
+    // 设置提示文本
+    void setTipsText(QString strTipsText);
+    // 设置是否显示取消等待按钮
+    void setCanCancel(bool bCanCancel);
+    // 移动到指定窗口中间显示
+    void moveToCenter(QWidget* pParent);
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+    void initUi();
+    
+Q_SIGNALS:
+    void cancelWaiting();
+
+private slots:
+    void cancelBtnClicked();
+
+private:
+    QFrame* m_pCenterFrame;
+    QLabel* m_pMovieLabel;
+    QMovie* m_pLoadingMovie;
+    QLabel* m_pTipsLabel;
+    QPushButton* m_pCancelBtn;
+};
+#endif   // LOADINGDIALOG_H