c - 使 GtkScrolledWindow 默认显示所有子项

Question

如何初始化 GtkScrolledWindow通过尽可能地增长来避免滚动条？

默认情况下它似乎越小越好。

演示代码(使用 SIGINT 退出):

#include <gtk/gtk.h>

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

    gtk_init(&argc, &argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

    sw = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
            GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_container_add(GTK_CONTAINER(window), sw);
    gtk_widget_show(sw);

    content = gtk_button_new_with_label("This is a very, very"
            "very very very very very very very very long text");
    gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw), content);
    gtk_widget_show(content);

    gtk_widget_show(window);
    gtk_main();

    return 0;
}

Answer 1

我认为这既有效又不是丑陋的 hack(很多):

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

    GtkRequisition size;
    GtkWidget* viewport;

    gtk_init(&argc, &argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

    sw = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw),
            GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_container_add(GTK_CONTAINER(window), sw);
    gtk_widget_show(sw);

    content = gtk_button_new_with_label("This is a very, very"
            "very very very very very very very very long text");
    gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw), content);
    gtk_widget_show(content);

    gtk_widget_show(window);

    viewport = gtk_widget_get_ancestor(content, GTK_TYPE_VIEWPORT);
    gtk_widget_size_request(viewport, &size);
    gtk_widget_set_size_request(sw, size.width, size.height);

    gtk_main();

    return 0;
}