单击gtk_drawing_area时,我正在尝试显示信息对话框窗口。
以下是我正在使用的代码:
#include <cairo.h>
#include <gtk/gtk.h>
void show_dialog_window(GtkWidget *widget, gpointer window) {
GtkWidget *dialog;
dialog = gtk_message_dialog_new(GTK_WINDOW(window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
"Hello dialog!");
gtk_window_set_title(GTK_WINDOW(dialog), "Information");
gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
}
int main(int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *darea;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
gtk_window_set_default_size(GTK_WINDOW(window), 400, 300);
gtk_window_set_title(GTK_WINDOW(window), "Click me to show an Info_Dialog");
darea = gtk_drawing_area_new();
gtk_container_add(GTK_CONTAINER(window), darea);
gtk_widget_add_events(window, GDK_BUTTON_PRESS_MASK);
g_signal_connect(window, "destroy",
G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(window, "button-press-event",
G_CALLBACK(show_dialog_window), (gpointer) window);
gtk_widget_show_all(window);
gtk_main();
return 0;
}
当我使用 gcc dialog.c pkg-config --cflags gtk+-3.0 --libs --libs cairo
命令编译并运行此代码时,-lm -o dialog&amp;&amp; ./dialog 我在终端上收到以下信息:
分段错误(核心转储)
关于我做错了什么的任何建议?
答案 0 :(得分:2)
问题在于回调函数。您正在使用以下原型:
void user_function(GtkWidget *widget, gpointer window)
它应该是,如API reference:
中所述gboolean user_function(GtkWidget *widget, GdkEvent *event, gpointer user_data)
调整你的回调,它应该是这样的:
gboolean show_dialog_window(GtkWidget *widget, GdkEvent *event, gpointer window) {
GtkWidget *dialog;
dialog = gtk_message_dialog_new(GTK_WINDOW(window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
"Hello dialog!");
gtk_window_set_title(GTK_WINDOW(dialog), "Information");
gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
return TRUE;
}
返回TRUE
将停止信号传播。
更改后,程序应该可以正常工作。您可以访问event
中的事件信息,例如按下了哪个按钮等