用GtkButton发出“clicked”信号传递GtkNotebook参数,以在回调函数中调用gtk_notebook_remove_page函数,出错
GLib-GObject-WARNING **: invalid cast from 'GtkButton' to 'GtkNotebook'
源码:
button=gtk_button_new_with_label("tab_os");
119 g_signal_connect_swapped(GTK_OBJECT(button),"clicked",G_CALLBACK(tab_po),notebook);
120 gtk_table_attach_defaults(GTK_TABLE(table),button,2,3,1,2);
回调函数:
void tab_po(GtkWidget*widget,gpointer notebook)
24 {
25 gtk_notebook_set_tab_pos(GTK_NOTEBOOK(notebook),GTK_POS_BOTTOM);
26 }
用GtkButton发出“clicked”信号传递GtkNotebook参数,以在回调函数中调用gtk_notebook_remove_page函数,出错
1 #include
2 #include
3 GtkWidget*entry;
4 void notebook_remove(GtkWidget*button,gpointer notebook)
5 {
6 gint page;
7 gchar buffer[20];
8 page=gtk_notebook_get_current_page(GTK_NOTEBOOK(notebook));
9 snprintf(buffer,20,"It is the %dth page",page);
10 gtk_entry_set_text(GTK_ENTRY(entry),buffer);
11 gtk_notebook_remove_page(GTK_NOTEBOOK(notebook),page);
12 }
13 int main(int argc,char**argv)
14 {
15 GtkWidget*window;
16 GtkWidget*tabel;
17 GtkWidget*notebook;
18 GtkWidget*button;
19 GtkWidget*label;
20 gchar bufferl[40];
21 gint i;
22 gtk_init(&argc,&argv);
23 window=gtk_dialog_new();
24 gtk_window_set_default_size(GTK_WINDOW(window),600,200);
25 notebook=gtk_notebook_new();
26 for(i=0;ivbox),notebook,FALSE,FALSE,0);
33 entry=gtk_entry_new();
34 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(window)->vbox),entry,FALSE,FALSE,0);
35 gtk_entry_set_text(GTK_ENTRY(entry),"Nothing happens");
36 button=gtk_button_new_with_mnemonic("remove");
37 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(window)->action_area),button,FALSE,FALSE,0);
38 g_signal_connect_swapped(GTK_OBJECT(button),"clicked",G_CALLBACK(notebook_remove),notebook);
39 button=gtk_button_new_with_label("close app");
40 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(window)->action_area),button,FALSE,FALSE,0);
41 g_signal_connect(GTK_OBJECT(button),"clicked",G_CALLBACK(gtk_main_quit),NULL);
42 gtk_widget_show_all(window);
43 gtk_main();
44 return 0;
45 }
46
gtk+图形编程的时候出现的错误,怎么破?invalid cast
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1条回答 默认 最新
- threenewbee 2015-09-24 15:39关注
人家需要一个notebook,你传了一个button,检查下你的函数参数,传错了。
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