新增无边框透明背景窗体

bgdemo/widget.h

@@ -0,0 +1,25 @@
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include <QWidget>
+
+namespace Ui {
+class Widget;
+}
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit Widget(QWidget *parent = 0);
+    ~Widget();
+
+protected:
+    bool eventFilter(QObject *watched, QEvent *evt);
+
+private:
+    Ui::Widget *ui;
+};
+
+#endif // WIDGET_H