mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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129 lines
4.9 KiB
C
129 lines
4.9 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, int response_id)
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{
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gtk_window_destroy (GTK_WINDOW (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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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 *expander;
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GtkWidget *label;
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GtkWidget *sw;
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GtkWidget *tv;
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GtkTextBuffer *buffer;
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GtkTextIter start;
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GtkTextIter end;
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GtkTextTag *tag;
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GdkPaintable *paintable;
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if (!window)
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{
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toplevel = GTK_WIDGET (gtk_widget_get_root (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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label = gtk_widget_get_last_child (area);
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gtk_label_set_wrap (GTK_LABEL (label), FALSE);
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gtk_widget_set_vexpand (label, FALSE);
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expander = gtk_expander_new ("Details:");
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gtk_widget_set_vexpand (expander, TRUE);
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sw = gtk_scrolled_window_new ();
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gtk_scrolled_window_set_min_content_height (GTK_SCROLLED_WINDOW (sw), 100);
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gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
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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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gtk_scrolled_window_set_propagate_natural_height (GTK_SCROLLED_WINDOW (sw), TRUE);
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gtk_widget_set_vexpand (sw, TRUE);
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tv = gtk_text_view_new ();
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g_object_set (tv,
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"left-margin", 10,
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"right-margin", 10,
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"top-margin", 10,
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"bottom-margin", 10,
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NULL);
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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_cursor_visible (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_view_set_pixels_above_lines (GTK_TEXT_VIEW (tv), 2);
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gtk_text_view_set_pixels_below_lines (GTK_TEXT_VIEW (tv), 2);
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gtk_text_buffer_set_text (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.\n"
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"Do it already!\n", -1);
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gtk_text_buffer_get_end_iter (buffer, &start);
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paintable = GDK_PAINTABLE (gdk_texture_new_from_resource ("/cursors/images/gtk_logo_cursor.png"));
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gtk_text_buffer_insert_paintable (buffer, &start, paintable);
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g_object_unref (paintable);
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gtk_text_iter_backward_char (&start);
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gtk_text_buffer_get_end_iter (buffer, &end);
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tag = gtk_text_buffer_create_tag (buffer, NULL,
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"pixels-above-lines", 200,
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"justification", GTK_JUSTIFY_RIGHT,
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NULL);
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gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), tv);
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gtk_expander_set_child (GTK_EXPANDER (expander), sw);
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gtk_box_append (GTK_BOX (area), 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 (window);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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