1 files changed, 397 insertions, 0 deletions
diff --git a/shell/e-sidebar.c b/shell/e-sidebar.c
new file mode 100644
index 0000000000..1f6df8c451
--- /dev/null
+++ b/shell/e-sidebar.c
@@ -0,0 +1,397 @@
+/* -*- 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)