实现按下鼠标左键拖动窗口


  1. 加入事件:
    gtk_widget_add_events(window, GDK_BUTTON_PRESS_MASK);
    
  2. 关联信号与button按下的事件:
    g_signal_connect(G_OBJECT(window), "button-press-event", G_CALLBACK(window_drag), NULL);
    
  3. 窗口拖动事件的实现:

    gboolean window_drag(GtkWidget *widget, GdkEventButton *event, GdkWindowEdge edge)
    {
     if (event->button == 1)
     {
         gtk_window_begin_move_drag(GTK_WINDOW(gtk_widget_get_toplevel(widget)), event->button, event->
    x_root, event->y_root, event->time);
     }
    
     return FALSE;
    

使窗口不能移出桌面最左边,在标题栏显示当前窗口的位置坐标


  1. 关联信号与事件:
    g_signal_connect(G_OBJECT(window), "configure-event", G_CALLBACK(window_move), NULL);
    
  2. 窗口移动事件的实现:
    gboolean window_move(GtkWidget *widget, GdkEvent *event, gpointer data)
    {
     gint x, y;
     gchar buf[10] = {0};
     x = event->configure.x;
     y = event->configure.y;
     if (x <= 0)//如果窗口超出桌面最左边框
     {
         x = 0;
         gtk_window_move(GTK_WINDOW(widget), x, y);
     }
     sprintf(buf, "%d,%d", x, y);
     gtk_window_set_title(GTK_WINDOW(widget), buf);
     return TRUE;
    }
    
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