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[gtk] signal handle

2009-02-14 23:25:47| 分类： gui_X | 标签： |举报 |字号大中小订阅

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对于点[x]按钮关闭窗口，点了一个 button，gtk中都会转换为起自己的 signal 反馈给 app。对于 signal handler，标准的声明：
static gboolean handler(GtkWidget *, ..., gpointer data);
不同的 handler，中间 ... 的内容不同。

"delete_event" 就是在点[x]按钮时，发送的信号。

=============================
#include <gtk/gtk.h>

static void destroy(GtkWidget*, gpointer);
static gboolean delete_event(GtkWidget*, GdkEvent*, gpointer);

int
main(int argc, char *argv[])
{
   GtkWidget *window, *label;

   gtk_init(&argc, &argv);

   window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_title(GTK_WINDOW(window), "Hello world");
   gtk_container_set_border_width(GTK_CONTAINER(window), 50);
   gtk_widget_set_size_request(window, 200, 100);

   g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(destroy), NULL);
   g_signal_connect(G_OBJECT(window), "delete_event", G_CALLBACK(delete_event), NULL);

   label = gtk_label_new("Hello World Too!");
   gtk_label_set_selectable(GTK_LABEL(label), FALSE);

   gtk_container_add(GTK_CONTAINER(window), label);
   gtk_widget_show_all(window);

   gtk_main();
   return 0;
}

static void
destroy(GtkWidget *window, gpointer data)
{
   gtk_main_quit();
}

static gboolean
delete_event(GtkWidget *window, GdkEvent *event, gpointer data)
{
   return FALSE;
}

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