Question

我有一个带有菜单的主窗口，它打开另一个窗口。此辅助窗口有一个关闭按钮。该按钮点击了连接的信号。我的问题是我不知道如何关闭/销毁该父窗口。我尝试过gtk_widget_destroy，但是因为窗口不是小部件而出现错误....我没有找到任何破坏父窗口的函数....

请问有人给我指路吗？提前谢谢。

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确定。我发布了一段代码。当我执行程序时，单击“打开窗口”按钮。打开一个新窗口，单击“关闭”按钮。如果我点击“关闭”按钮我在终端中得到下一个错误：（Windows：13801）：Gtk-CRITICAL **：gtk_widget_destroy：断言`GTK_IS_WIDGET（小部件）'失败

代码是：

#include <stdlib.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

void open_window(GtkWidget *widget, gpointer window);
void close_window(GtkWidget *widget, gpointer window);

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

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Windows");
    gtk_window_set_default_size(GTK_WINDOW(window), 230, 150);
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);

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

    button = gtk_button_new_with_label("Open window");

    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(open_window), 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;

}


void open_window(GtkWidget *widget, gpointer window)
{
    GtkBuilder *builder;
    GtkWidget *secondWindow = NULL;

    builder = gtk_builder_new ();
    gtk_builder_add_from_file (builder, "secondWindow.glade", NULL);

    secondWindow = GTK_WIDGET (gtk_builder_get_object (builder, "secondWindow"));

    gtk_builder_connect_signals (builder, NULL);

    g_object_unref (G_OBJECT (builder));

    gtk_window_set_modal(GTK_WINDOW(secondWindow), TRUE);
    gtk_widget_show_all(secondWindow);
}

void close_window(GtkWidget *widget, gpointer window)
{
    gtk_widget_destroy(GTK_WIDGET(window));
}

在文件“secondWindow.glade”中定义了一个窗口，一个表格和一个放在表格中间单元格中的按钮。此外，它还定义了一个名为“close_window”的“clicked”事件按钮的句柄。

如果有人想要执行它，请链接到glade文件：https://sites.google.com/site/marvalsiteimages/secondWindow.glade

我希望这可以帮助你理解我的问题。 Thansk。

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基于响应的最终代码：

void open_window(GtkWidget *widget, gpointer window)
{
    GtkBuilder *builder;
    GtkWidget *secondWindow = NULL;
    GtkWidget *closeButton = NULL;

    builder = gtk_builder_new ();
    gtk_builder_add_from_file (builder, "secondWindow.glade", NULL);

    secondWindow = GTK_WIDGET (gtk_builder_get_object (builder, "secondWindow"));
    closeButton = GTK_WIDGET (gtk_builder_get_object (builder, "closeWindowButton"));

    g_signal_connect (G_OBJECT (closeButton),
                      "clicked",
                      G_CALLBACK (close_window),
                      G_OBJECT (secondWindow)); // here is the magic: the callback will get the window to close

    g_object_unref (G_OBJECT (builder));

    gtk_window_set_modal(GTK_WINDOW(secondWindow), TRUE);
    gtk_widget_show_all(secondWindow);
}

Answer 1

您的问题是第二个窗口按钮的“单击”信号是从空档文件连接的。但是信号处理程序需要一个指向窗口的指针来销毁它。这是通过信号回调的“user_data”参数传递的。

一种方法是将第二个窗口作为Glade中的user_data参数传递（看一下这个Glade tutorial），但是参数应该是一个指针，我不知道怎么能用林间空地做。编辑：只需在glade中单击与此信号关联的用户数据字段，弹出窗口将允许您选择要传递给信号处理程序的对象。只需选择“secondWindow”对象即可。

另一种方法是从glade文件中删除信号处理，并手动连接代码中的单击信号，将指针作为用户数据传递给第二个窗口：

void open_window(GtkWidget *widget, gpointer window)
{
    GtkBuilder *builder;
    GtkWidget *secondWindow = NULL;
    GtkWidget *closeButton = NULL;

    builder = gtk_builder_new ();
    gtk_builder_add_from_file (builder, "secondWindow.glade", NULL);

    secondWindow = GTK_WIDGET (gtk_builder_get_object (builder, "secondWindow"));
    closeButton = GTK_WIDGET (gtk_builder_get_object (builder, "closeWindowButton"));

    g_signal_connect (G_OBJECT (closeButton),
        "clicked",
        G_CALLBACK (close_window),
        G_OBJECT (secondWindow)); // here is the magic: the callback will get the window to close

    g_object_unref (G_OBJECT (builder));

    gtk_window_set_modal(GTK_WINDOW(secondWindow), TRUE);
    gtk_widget_show_all(secondWindow);
}

gtk - 关闭窗口表单，带有C中的按钮

1 个答案: