gdk_window_get_pointer用来获取鼠标指针的坐标gdk_pointer_grab函数用来让一个窗口独占指针gdk_pointer_is_grabbed函数用来判断鼠标是否被独占了gdk_pointer_ungrab用来取消对鼠标指针的独占==========================================================在程序中改变鼠标指针的方法GdkCursor* cursor;cursor = gdk_cursor_new(GDK_CLOCK);gdk_window_set_cursor(window, cursor);gdk_cursor_destroy(cursor);注意：一旦将鼠标连接到窗口，就可以将其销毁
