mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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609e04ddcf
Clean up the code of many examples in minor ways, fix some memory leaks, and avoid the use of dialogs where a regular toplevel works just as well.
103 lines
3.9 KiB
C
103 lines
3.9 KiB
C
/* Expander
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*
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* GtkExpander allows to provide additional content that is initially hidden.
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* This is also known as "disclosure triangle".
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*
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* This example also shows how to make the window resizable only if the expander
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* is expanded.
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*/
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#include <glib/gi18n.h>
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#include <gtk/gtk.h>
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static GtkWidget *window = NULL;
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static void
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response_cb (GtkDialog *dialog, gint response_id)
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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static void
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expander_cb (GtkExpander *expander, GParamSpec *pspec, GtkWindow *dialog)
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{
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gtk_window_set_resizable (dialog, gtk_expander_get_expanded (expander));
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}
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static void
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do_not_expand (GtkWidget *child, gpointer data)
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{
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gtk_container_child_set (GTK_CONTAINER (gtk_widget_get_parent (child)), child,
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"expand", FALSE, "fill", FALSE, NULL);
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}
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GtkWidget *
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do_expander (GtkWidget *do_widget)
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{
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GtkWidget *toplevel;
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GtkWidget *area;
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GtkWidget *box;
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GtkWidget *expander;
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GtkWidget *sw;
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GtkWidget *tv;
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GtkTextBuffer *buffer;
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if (!window)
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{
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toplevel = gtk_widget_get_toplevel (do_widget);
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window = gtk_message_dialog_new_with_markup (GTK_WINDOW (toplevel),
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0,
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GTK_MESSAGE_ERROR,
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GTK_BUTTONS_CLOSE,
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"<big><b>%s</b></big>",
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"Something went wrong");
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gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (window),
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"Here are some more details "
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"but not the full story.");
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area = gtk_message_dialog_get_message_area (GTK_MESSAGE_DIALOG (window));
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box = gtk_widget_get_parent (area);
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gtk_container_child_set (GTK_CONTAINER (gtk_widget_get_parent (box)), box,
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"expand", TRUE, "fill", TRUE, NULL);
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gtk_container_foreach (GTK_CONTAINER (area), do_not_expand, NULL);
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expander = gtk_expander_new ("Details:");
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sw = gtk_scrolled_window_new (NULL, NULL);
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gtk_scrolled_window_set_min_content_height (GTK_SCROLLED_WINDOW (sw), 100);
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gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
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GTK_POLICY_NEVER,
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GTK_POLICY_AUTOMATIC);
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tv = gtk_text_view_new ();
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (tv));
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gtk_text_view_set_editable (GTK_TEXT_VIEW (tv), FALSE);
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gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (tv), GTK_WRAP_WORD);
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gtk_text_buffer_set_text (GTK_TEXT_BUFFER (buffer),
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"Finally, the full story with all details. "
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"And all the inside information, including "
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"error codes, etc etc. Pages of information, "
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"you might have to scroll down to read it all, "
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"or even resize the window - it works !\n"
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"A second paragraph will contain even more "
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"innuendo, just to make you scroll down or "
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"resize the window. Do it already !", -1);
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gtk_container_add (GTK_CONTAINER (sw), tv);
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gtk_container_add (GTK_CONTAINER (expander), sw);
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gtk_box_pack_end (GTK_BOX (area), expander, TRUE, TRUE, 0);
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gtk_widget_show_all (expander);
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g_signal_connect (expander, "notify::expanded",
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G_CALLBACK (expander_cb), window);
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g_signal_connect (window, "response", G_CALLBACK (response_cb), NULL);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show_all (window);
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else
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gtk_widget_destroy (window);
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return window;
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}
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