如何解决[GTK4][C] 动作应该如何与菜单项连接?
我正在用 C 语言编写一个使用 GTK4 的应用程序。我试图将一些操作与菜单项联系起来,但这些项是非活动的,即它们在出现时不可点击。我不知道解决此问题的方法,因此不胜感激。
部分代码如下。
#include <gtk/gtk.h>
int main(int argc,char **argv)
{
int status;
application = gtk_application_new("gtk.example",G_APPLICATION_FLAGS_NONE);
g_signal_connect_swapped(application,"active" G_CALL_BACK(create_window),application);
status = g_application_run(G_APPLICATION(application),argc,argv);
g_object_unref(application);
return status;
}
void create_window(GtkApplication *application)
{
GMenu *menubar;
GMenu *menu;
GMenuItem *item;
window = gtk_application_window_new(application);
gtk_window_set_application(GTK_WINDOW(window),application);
const GActionEntry entries[] =
{
{"close",quit}
};
g_action_map_add_action_entries(G_ACTION_MAP(application),entries,G_N_ELEMENTS(entries),NULL);
menubar = g_menu_new();
menu = g_menu_new();
item = g_menu_item_new("Close","app.close");
g_menu_append_item(menu,item);
g_object_unref(item);
g_menu_append_submenu(menubar,"File",G_MENU_MODEL(menu));
g_object_unref(menu);
gtk_application_set_menubar(application,G_MENU_MODEL(menubar));
gtk_application_window_set_show_menubar(GTK_APPLICATION_WINDOW(window),TRUE);
gtk_window_present(GTK_WINDOW(window));
}
static void quit(GSimpleAction *action,GVariant *parameter,gpointer data)
{
g_print("You choose close action\n");
}
我得到的结果如下。关闭不可点击。
解决方法
你的代码有很多问题,我不知道应该从哪里开始。
无论如何,主要问题(但不是唯一的)就在这里:
const GActionEntry entries[] =
{
{"close",quit}
};
应该是这样的:
const GActionEntry entries[] =
{
{"close",quit,NULL,{ 0,0 } }
};
这是一个工作程序:
#include <gtk/gtk.h>
void create_window ( GtkApplication *application );
static void quit ( GSimpleAction *action,GVariant *parameter,gpointer data );
int main ( int argc,char **argv )
{
GtkApplication *application;
int status;
/// ***
application = gtk_application_new ( "gtk.example",G_APPLICATION_FLAGS_NONE );
g_signal_connect_swapped ( application,"activate",G_CALLBACK ( create_window ),application );
/// ***
status = g_application_run ( G_APPLICATION ( application ),argc,argv );
g_object_unref ( application );
return status;
}
void create_window ( GtkApplication *application )
{
GtkWidget *window;
GMenu *menubar;
GMenu *menu;
GMenuItem *item;
/// ***
window = gtk_application_window_new ( application );
gtk_window_set_application ( GTK_WINDOW ( window ),application );
/// ***
const GActionEntry entries[] =
{
{"close",0 } }
};
/// **
g_action_map_add_action_entries ( G_ACTION_MAP ( application ),entries,G_N_ELEMENTS ( entries ),NULL );
/// ***
menubar = g_menu_new();
menu = g_menu_new();
item = g_menu_item_new ( "Close","app.close" );
/// ***
g_menu_append_item ( menu,item );
g_object_unref ( item );
/// ***
g_menu_append_submenu ( menubar,"File",G_MENU_MODEL ( menu ) );
g_object_unref ( menu );
/// ***
gtk_application_set_menubar ( application,G_MENU_MODEL ( menubar ) );
gtk_application_window_set_show_menubar ( GTK_APPLICATION_WINDOW ( window ),TRUE );
/// ***
gtk_window_present ( GTK_WINDOW ( window ) );
}
static void quit ( GSimpleAction *action,G_GNUC_UNUSED GVariant *parameter,G_GNUC_UNUSED gpointer data )
{
g_print ( "You choose `%s` action\n",g_action_get_name ( G_ACTION( action ) ) );
}
我强烈建议您to check these Videos。
顺便说一下,没有 active
信号,您需要 activate
代替。
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