Question

这里总共100％编码noob。我正在试验GTK +和C，我正在尝试创建一个基本窗口，上面有一个图像。

这是我的（可能是令人讨厌的）代码：

#include <gtk/gtk.h>


int main( int argc, char *argv[])
{
  GtkWidget *window;
  GtkWidget *fixed;
  GtkWidget *button;
  GtkImage *image;

  gtk_init(&argc, &argv);

  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title(GTK_WINDOW(window), "GtkButton");
  gtk_window_set_default_size(GTK_WINDOW(window), 640, 480);
  gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);

  fixed = gtk_fixed_new();
  gtk_container_add(GTK_CONTAINER(window), fixed);

  image = gtk_image_new();
  gtk_image_set_from_file(GTK_IMAGE(image),"/home/testbed/Downloads/efnbxw.jpg");

  gtk_fixed_put(GTK_FIXED(fixed), button, 50, 50);
  gtk_widget_set_size_request(button, 80, 35);

  g_signal_connect(G_OBJECT(button), "clicked",
      G_CALLBACK(gtk_main_quit), G_OBJECT(window));

  g_signal_connect_swapped(G_OBJECT(window), "destroy",
      G_CALLBACK(gtk_main_quit), NULL);

  gtk_widget_show_all(window);

  gtk_main();

  return 0;
}

我做错了什么？

废弃上述代码，这完全不正确

#include <gtk/gtk.h>

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

    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), 230, 150);
    gtk_window_set_title(GTK_WINDOW(window), "Image");
    gtk_window_set_resizable(GTK_WINDOW(window), FALSE);

    gtk_container_set_border_width(GTK_CONTAINER(window), 2);

    image = gtk_image_new_from_file("/home/testbed/Downloads/efnbxw.jpg");
    gtk_container_add(GTK_CONTAINER(window), image);

    g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
    gtk_widget_show_all(window);
    gtk_main();

    return 0;
}

^^继承我的新代码。它使用我选择的图像编译并显示一个窗口。

这里的任何人都可以帮我编码，以便在点击图片时关闭应用程序吗？

Answer 1

图像窗口小部件是不捕获事件的窗口小部件之一（因为它们没有自己的窗口）。您可以将这些小部件放在事件框小部件中，并启用按钮按下等事件的捕获。试试这个修改版本的更新。

#include <gtk/gtk.h>

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

    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), 230, 150);
    gtk_window_set_title(GTK_WINDOW(window), "Image");
    gtk_window_set_resizable(GTK_WINDOW(window), FALSE);

    gtk_container_set_border_width(GTK_CONTAINER(window), 2);

    image = gtk_image_new_from_file("/home/testbed/Downloads/efnbxw.jpg");
    //gtk_container_add(GTK_CONTAINER(window), image);

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

    GtkWidget* eventBox = gtk_event_box_new();
    gtk_container_add(GTK_CONTAINER(window), eventBox);

    // Capture button presses.                                                                                                                     
    gtk_widget_add_events (eventBox, GDK_BUTTON_PRESS_MASK);
    g_signal_connect(G_OBJECT(eventBox), "button-press-event", G_CALLBACK(gtk_main_quit), NULL);
    gtk_container_add(GTK_CONTAINER(eventBox), image);

    gtk_widget_show_all(window);
    gtk_main();

    return 0;
}

Answer 2

分段错误意味着您正在访问超出程序中定义的边界的内存位置。从上面的代码中我假设您的一个指针导致问题..

GTK +分段错误

2 个答案: