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-rw-r--r--shell/e-sidebar.c397
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diff --git a/shell/e-sidebar.c b/shell/e-sidebar.c
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+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/* e-sidebar.c
+ *
+ * Copyright (C) 2003 Ettore Perazzoli
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Ettore Perazzoli <ettore@ximian.com>
+ */
+
+#include <config.h>
+
+#include "e-sidebar.h"
+
+#include "e-shell-marshal.h"
+
+#include <gal/util/e-util.h>
+
+#include <gtk/gtkhbox.h>
+#include <gtk/gtkimage.h>
+#include <gtk/gtklabel.h>
+#include <gtk/gtktogglebutton.h>
+
+
+#define PARENT_TYPE gtk_container_get_type ()
+static GtkContainerClass *parent_class = NULL;
+
+
+typedef struct {
+ GtkWidget *button_widget;
+ int id;
+} Button;
+
+struct _ESidebarPrivate {
+ GtkWidget *selection_widget;
+ GSList *buttons;
+
+ gboolean in_toggle;
+};
+
+
+enum {
+ BUTTON_SELECTED,
+ NUM_SIGNALS
+};
+
+static unsigned int signals[NUM_SIGNALS] = { 0 };
+
+
+#define PADDING 3
+
+
+/* Callbacks. */
+
+static void
+button_toggled_callback (GtkToggleButton *toggle_button,
+ ESidebar *sidebar)
+{
+ int id = 0;
+ GSList *p;
+
+ if (sidebar->priv->in_toggle)
+ return;
+
+ sidebar->priv->in_toggle = TRUE;
+
+ for (p = sidebar->priv->buttons; p != NULL; p = p->next) {
+ Button *button = p->data;
+
+ if (button->button_widget != toggle_button) {
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button->button_widget), FALSE);
+ } else {
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button->button_widget), TRUE);
+ id = button->id;
+ }
+ }
+
+ sidebar->priv->in_toggle = FALSE;
+
+ g_signal_emit (sidebar, signals[BUTTON_SELECTED], 0, id);
+}
+
+
+/* Utility functions. */
+
+static Button *
+button_new (GtkWidget *button_widget,
+ int id)
+{
+ Button *button = g_new (Button, 1);
+
+ button->button_widget = button_widget;
+ button->id = id;
+
+ g_object_ref (button_widget);
+
+ return button;
+}
+
+static void
+button_free (Button *button)
+{
+ g_object_unref (button->button_widget);
+ g_free (button);
+}
+
+
+/* Layout. */
+
+static void
+do_layout (ESidebar *sidebar)
+{
+ GtkAllocation *allocation = & GTK_WIDGET (sidebar)->allocation;
+ GSList *rows [g_slist_length (sidebar->priv->buttons)];
+ GSList *p;
+ int row_number;
+ int row_width;
+ int row_last;
+ int x, y;
+ int i;
+
+ /* (Yes, this code calls gtk_widget_size_request() an ungodly number of times, but it's not
+ like we care about performance here, and this makes the code simpler.) */
+
+ /* 1. Split the buttons into rows, depending on their width. */
+
+ row_number = 0;
+ rows [0] = NULL;
+ row_width = PADDING;
+ for (p = sidebar->priv->buttons; p != NULL; p = p->next) {
+ Button *button = p->data;
+ GtkRequisition requisition;
+
+ gtk_widget_size_request (GTK_WIDGET (button->button_widget), &requisition);
+
+ if (row_width + requisition.width + PADDING >= allocation->width
+ && rows [row_number] != NULL) {
+ row_number ++;
+ rows [row_number] = NULL;
+ row_width = PADDING;
+ }
+
+ row_width += requisition.width + PADDING;
+ rows [row_number] = g_slist_append (rows [row_number], button->button_widget);
+ }
+
+ row_last = row_number;
+
+ /* 2. Layout the buttons. */
+
+ y = allocation->y + allocation->height - PADDING - 1;
+ for (i = row_last; i >= 0; i --) {
+ int row_height = 0;
+
+ for (p = rows [i]; p != NULL; p = p->next) {
+ GtkRequisition requisition;
+
+ gtk_widget_size_request (GTK_WIDGET (p->data), &requisition);
+ row_height = MAX (row_height, requisition.height);
+ }
+
+ y -= row_height;
+ x = PADDING;
+ for (p = rows [i]; p != NULL; p = p->next) {
+ GtkRequisition requisition;
+ GtkAllocation child_allocation;
+
+ gtk_widget_size_request (GTK_WIDGET (p->data), &requisition);
+
+ child_allocation.x = x;
+ child_allocation.y = y;
+ child_allocation.width = requisition.width;
+ child_allocation.height = requisition.height;
+
+ gtk_widget_size_allocate (GTK_WIDGET (p->data), &child_allocation);
+
+ x += requisition.width + PADDING;
+ }
+
+ y -= PADDING;
+ }
+
+
+ /* 3. Place the selection widget. */
+
+ {
+ GtkAllocation child_allocation;
+
+ child_allocation.x = allocation->x + PADDING;
+ child_allocation.y = allocation->y + PADDING;
+ child_allocation.width = allocation->width - PADDING * 2;
+ child_allocation.height = y - allocation->y;
+
+ gtk_widget_size_allocate (sidebar->priv->selection_widget, & child_allocation);
+ }
+
+
+ /* 4. Free stuff */
+
+ for (i = 0; i <= row_last; i ++)
+ g_slist_free (rows [i]);
+}
+
+
+/* GtkContainer methods. */
+
+static void
+impl_forall (GtkContainer *container,
+ gboolean include_internals,
+ GtkCallback callback,
+ void *callback_data)
+{
+ ESidebar *sidebar = E_SIDEBAR (container);
+ GSList *p;
+
+ if (sidebar->priv->selection_widget != NULL)
+ (* callback) (sidebar->priv->selection_widget, callback_data);
+
+ for (p = sidebar->priv->buttons; p != NULL; p = p->next) {
+ GtkWidget *widget = ((Button *) p->data)->button_widget;
+ (* callback) (widget, callback_data);
+ }
+}
+
+
+/* GtkWidget methods. */
+
+static void
+impl_size_request (GtkWidget *widget,
+ GtkRequisition *requisition)
+{
+ ESidebar *sidebar = E_SIDEBAR (widget);
+ GSList *p;
+
+ if (sidebar->priv->selection_widget == NULL) {
+ requisition->width = 2 * PADDING;
+ requisition->height = 2 * PADDING;
+ } else {
+ gtk_widget_size_request (sidebar->priv->selection_widget, requisition);
+ requisition->width += 2 * PADDING;
+ requisition->height += 2 * PADDING;
+ }
+
+ for (p = sidebar->priv->buttons; p != NULL; p = p->next) {
+ Button *button = p->data;
+ GtkRequisition button_requisition;
+
+ gtk_widget_size_request (button->button_widget, &button_requisition);
+
+ requisition->width = MAX (requisition->width, button_requisition.width + 2 * PADDING);
+ requisition->height += button_requisition.height + PADDING;
+ }
+}
+
+static void
+impl_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ widget->allocation = *allocation;
+
+ do_layout (E_SIDEBAR (widget));
+}
+
+
+/* GObject methods. */
+
+static void
+impl_dispose (GObject *object)
+{
+ ESidebarPrivate *priv = E_SIDEBAR (object)->priv;
+
+ g_slist_foreach (priv->buttons, (GFunc) button_free, NULL);
+ g_slist_free (priv->buttons);
+ priv->buttons = NULL;
+
+ (* G_OBJECT_CLASS (parent_class)->dispose) (object);
+}
+
+static void
+impl_finalize (GObject *object)
+{
+ ESidebarPrivate *priv = E_SIDEBAR (object)->priv;
+
+ g_free (priv);
+
+ (* G_OBJECT_CLASS (parent_class)->finalize) (object);
+}
+
+
+/* Initialization. */
+
+static void
+class_init (ESidebarClass *class)
+{
+ GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+ GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+ container_class->forall = impl_forall;
+
+ widget_class->size_request = impl_size_request;
+ widget_class->size_allocate = impl_size_allocate;
+
+ object_class->dispose = impl_dispose;
+ object_class->finalize = impl_finalize;
+
+ parent_class = g_type_class_peek_parent (class);
+
+
+ signals[BUTTON_SELECTED]
+ = g_signal_new ("button_selected",
+ G_OBJECT_CLASS_TYPE (object_class),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (ESidebarClass, button_selected),
+ NULL, NULL,
+ e_shell_marshal_NONE__INT,
+ G_TYPE_NONE, 1,
+ G_TYPE_INT);
+}
+
+static void
+init (ESidebar *sidebar)
+{
+ ESidebarPrivate *priv;
+
+ GTK_WIDGET_SET_FLAGS (sidebar, GTK_NO_WINDOW);
+
+ priv = g_new0 (ESidebarPrivate, 1);
+ sidebar->priv = priv;
+}
+
+
+GtkWidget *
+e_sidebar_new (void)
+{
+ ESidebar *sidebar = g_object_new (e_sidebar_get_type (), NULL);
+
+ return GTK_WIDGET (sidebar);
+}
+
+
+void
+e_sidebar_set_selection_widget (ESidebar *sidebar, GtkWidget *widget)
+{
+ if (sidebar->priv->selection_widget != NULL)
+ gtk_widget_unparent (sidebar->priv->selection_widget);
+
+ sidebar->priv->selection_widget = widget;
+ gtk_widget_set_parent (widget, GTK_WIDGET (sidebar));
+
+ gtk_widget_queue_resize (GTK_WIDGET (sidebar));
+}
+
+
+void
+e_sidebar_add_button (ESidebar *sidebar,
+ const char *label,
+ GdkPixbuf *icon,
+ int id)
+{
+ GtkWidget *button_widget;
+ GtkWidget *hbox;
+ GtkWidget *icon_widget;
+ GtkWidget *label_widget;
+
+ button_widget = gtk_toggle_button_new ();
+ sidebar->priv->buttons = g_slist_append (sidebar->priv->buttons, button_new (button_widget, id));
+ gtk_widget_set_parent (button_widget, GTK_WIDGET (sidebar));
+
+ g_signal_connect (button_widget, "toggled", G_CALLBACK (button_toggled_callback), sidebar);
+
+ hbox = gtk_hbox_new (FALSE, 3);
+ icon_widget = gtk_image_new_from_pixbuf (icon);
+ label_widget = gtk_label_new (label);
+ gtk_box_pack_start (GTK_BOX (hbox), icon_widget, FALSE, TRUE, 0);
+ gtk_box_pack_start (GTK_BOX (hbox), label_widget, TRUE, TRUE, 0);
+ gtk_container_add (GTK_CONTAINER (button_widget), hbox);
+
+ gtk_widget_show_all (button_widget);
+
+ gtk_widget_queue_resize (GTK_WIDGET (sidebar));
+}
+
+
+E_MAKE_TYPE (e_sidebar, "ESidebar", ESidebar, class_init, init, PARENT_TYPE)