GTK+写一个截图的程序但遇到一点问题

Question

GtkWidget *main_window = gtk_window_new(GTK_WINDOW_TOP);
.....省略中间
GtkDrawable *src;
src = GDK_DRAWABLE(main_window); //运行时这里显示invalid cast from `GtkWindow' to `GdkDrawable'
GdkPixbuf *pbuf = gdk_pixbuf_get_from_drawable(NULL,src,NULL,0,0,0,0,100,100);  //Source drawable has no colormap; either pass in a colormap, or set the colormap on the drawable with gdk_drawable_set_colormap()
这里传进去colormap也会说colormap深度不同之类的.用gdk_drawable_set_colormap()也没有效果.

到底该怎么解决这个问题呢?

Answer 1

呵呵,好了,原来GtkWidget需要传成GtkWindow(gtk_widget_get_window)
http://stackoverflow.com/questio ... with-assertion-fail
我搜了很久哦