-/* -*- 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;

- GtkWidget *label;

- GtkWidget *icon;

- GtkWidget *hbox;

- int id;

-} Button;

-

-struct _ESidebarPrivate {

- ESidebarMode mode;

-

- GtkWidget *selection_widget;

- GSList *buttons;

-

- gboolean in_toggle;

-};

-

-

-enum {

- BUTTON_SELECTED,

- NUM_SIGNALS

-};

-

-static unsigned int signals[NUM_SIGNALS] = { 0 };

-

-

-#define H_PADDING 6

-#define V_PADDING 6

-

-

-/* Utility functions. */

-

-static Button *

-button_new (GtkWidget *button_widget, GtkWidget *label, GtkWidget *icon,

- GtkWidget *hbox, int id)

-{

- Button *button = g_new (Button, 1);

-

- button->button_widget = button_widget;

- button->label = label;

- button->icon = icon;

- button->hbox = hbox;

- button->id = id;

-

- g_object_ref (button_widget);

- g_object_ref (label);

- g_object_ref (icon);

- g_object_ref (hbox);

-

- return button;

-}

-

-static void

-button_free (Button *button)

-{

- g_object_unref (button->button_widget);

- g_object_unref (button->label);

- g_object_unref (button->icon);

- g_object_unref (button->hbox);

- g_free (button);

-}

-

-static void

-update_buttons (ESidebar *sidebar, int new_selected_id)

-{

- GSList *p;

-

- sidebar->priv->in_toggle = TRUE;

-

- for (p = sidebar->priv->buttons; p != NULL; p = p->next) {

- Button *button = p->data;

-

- if (button->id == new_selected_id)

- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button->button_widget), TRUE);

- else

- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button->button_widget), FALSE);

- }

-

- sidebar->priv->in_toggle = FALSE;

-}

-

-

-/* 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 != GTK_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);

-}

-

-

-/* Layout. */

-

-static int

-layout_buttons (ESidebar *sidebar)

-{

- GtkAllocation *allocation = & GTK_WIDGET (sidebar)->allocation;

- gboolean icons_only = (sidebar->priv->mode == E_SIDEBAR_MODE_ICON);

- int num_btns = g_slist_length (sidebar->priv->buttons), btns_per_row;

- GSList **rows, *p;

- Button *button;

- int row_number;

- int max_btn_width = 0, max_btn_height = 0;

- int row_last;

- int x, y;

- int i;

-

- y = allocation->y + allocation->height - V_PADDING - 1;

-

- if (num_btns == 0)

- return y;

-

- /* Figure out the max width and height */

- for (p = sidebar->priv->buttons; p != NULL; p = p->next) {

- GtkRequisition requisition;

-

- button = p->data;

- gtk_widget_size_request (GTK_WIDGET (button->button_widget), &requisition);

-

- max_btn_height = MAX (max_btn_height, requisition.height);

- max_btn_width = MAX (max_btn_width, requisition.width);

- }

-

- /* Figure out how many rows and columns we'll use. */

- btns_per_row = allocation->width / (max_btn_width + H_PADDING);

- if (!icons_only) {

- /* If using text buttons, we want to try to have a

- * completely filled-in grid, but if we can't, we want

- * the odd row to have just a single button.

- */

- while (num_btns % btns_per_row > 1)

- btns_per_row--;

- }

-

- /* Assign buttons to rows */

- rows = g_new0 (GSList *, num_btns / btns_per_row + 1);

-

- if (!icons_only && num_btns % btns_per_row != 0) {

- button = sidebar->priv->buttons->data;

- rows [0] = g_slist_append (rows [0], button->button_widget);

-

- p = sidebar->priv->buttons->next;

- row_number = p ? 1 : 0;

- } else {

- p = sidebar->priv->buttons;

- row_number = 0;

- }

-

- for (; p != NULL; p = p->next) {

- button = p->data;

-

- if (g_slist_length (rows [row_number]) == btns_per_row)

- row_number ++;

-

- rows [row_number] = g_slist_append (rows [row_number], button->button_widget);

- }

-

- row_last = row_number;

-

- /* Layout the buttons. */

- for (i = row_last; i >= 0; i --) {

- int len, extra_width;

-

- y -= max_btn_height;

- x = H_PADDING + allocation->x;

- len = g_slist_length (rows[i]);

- if (sidebar->priv->mode == E_SIDEBAR_MODE_TEXT)

- extra_width = (allocation->width - (len * max_btn_width ) - (len * H_PADDING)) / len;

- else

- extra_width = 0;

- for (p = rows [i]; p != NULL; p = p->next) {

- GtkAllocation child_allocation;

-

- child_allocation.x = x;

- child_allocation.y = y;

- child_allocation.width = max_btn_width + extra_width;

- child_allocation.height = max_btn_height;

-

- gtk_widget_size_allocate (GTK_WIDGET (p->data), &child_allocation);

-

- x += child_allocation.width + H_PADDING;

- }

-

- y -= V_PADDING;

- }

-

- for (i = 0; i <= row_last; i ++)

- g_slist_free (rows [i]);

- g_free (rows);

-

- return y;

-}

-

-static void

-do_layout (ESidebar *sidebar)

-{

- GtkAllocation *allocation = & GTK_WIDGET (sidebar)->allocation;

- GtkAllocation child_allocation;

- int y;

-

- y = layout_buttons (sidebar);

-

- /* Place the selection widget. */

- child_allocation.x = allocation->x;

- child_allocation.y = allocation->y;

- child_allocation.width = allocation->width;

- child_allocation.height = y - allocation->y;

-

- gtk_widget_size_allocate (sidebar->priv->selection_widget, & child_allocation);

-}

-

-

-/* 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);

- }

-}

-

-static void

-impl_remove (GtkContainer *container,

- GtkWidget *widget)

-{

- ESidebar *sidebar = E_SIDEBAR (container);

- GSList *p;

-

- if (widget == sidebar->priv->selection_widget) {

- e_sidebar_set_selection_widget (sidebar, NULL);

- return;

- }

-

- for (p = sidebar->priv->buttons; p != NULL; p = p->next) {

- GtkWidget *button_widget = ((Button *) p->data)->button_widget;

-

- if (button_widget == widget) {

- gtk_widget_unparent (button_widget);

- sidebar->priv->buttons = g_slist_remove_link (sidebar->priv->buttons, p);

- gtk_widget_queue_resize (GTK_WIDGET (sidebar));

- break;

- }

- }

-}

-

-

-/* 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 * H_PADDING;

- requisition->height = 2 * V_PADDING;

- } else {

- gtk_widget_size_request (sidebar->priv->selection_widget, requisition);

- }

-

- 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 * H_PADDING);

- requisition->height += button_requisition.height + V_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;

- container_class->remove = impl_remove;

-

- 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;

-

- priv->mode = E_SIDEBAR_MODE_TEXT;

-}

-

-

-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;

-

- if (widget != NULL)

- 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 ();

- g_signal_connect (button_widget, "toggled", G_CALLBACK (button_toggled_callback), sidebar);

-

- hbox = gtk_hbox_new (FALSE, 3);

- gtk_container_set_border_width (GTK_CONTAINER (hbox), 2);

- icon_widget = gtk_image_new_from_pixbuf (icon);

- label_widget = gtk_label_new (label);

- gtk_misc_set_alignment (GTK_MISC (label_widget), 0.0, 0.5);

- gtk_box_pack_start (GTK_BOX (hbox), icon_widget, sidebar->priv->mode == E_SIDEBAR_MODE_ICON, TRUE, 0);

- gtk_box_pack_start (GTK_BOX (hbox), label_widget, TRUE, TRUE, 0);

- gtk_container_add (GTK_CONTAINER (button_widget), hbox);

-

- sidebar->priv->buttons = g_slist_append (sidebar->priv->buttons, button_new (button_widget, label_widget, icon_widget, hbox, id));

- gtk_widget_set_parent (button_widget, GTK_WIDGET (sidebar));

-

- if (sidebar->priv->mode == E_SIDEBAR_MODE_ICON)

- gtk_container_remove (GTK_CONTAINER (hbox), label_widget);

-

- gtk_widget_queue_resize (GTK_WIDGET (sidebar));

-}

-

-

-void

-e_sidebar_select_button (ESidebar *sidebar, int id)

-{

- update_buttons (sidebar, id);

-

- g_signal_emit (sidebar, signals[BUTTON_SELECTED], 0, id);

-}

-

-ESidebarMode

-e_sidebar_get_mode (ESidebar *sidebar)

-{

- return sidebar->priv->mode;

-}

-

-void

-e_sidebar_set_mode (ESidebar *sidebar, ESidebarMode mode)

-{

- GSList *p;

-

- if (sidebar->priv->mode == mode)

- return;

-

- for (p = sidebar->priv->buttons; p != NULL; p = p->next) {

- Button *button = p->data;

-

- switch (mode) {

- case E_SIDEBAR_MODE_TEXT:

- gtk_box_pack_start (GTK_BOX (button->hbox), button->label, TRUE, TRUE, 0);

- gtk_container_child_set (GTK_CONTAINER (button->hbox), button->icon,

- "expand", FALSE,

- NULL);

- break;

- case E_SIDEBAR_MODE_ICON:

- gtk_container_remove (GTK_CONTAINER (button->hbox), button->label);

- gtk_container_child_set (GTK_CONTAINER (button->hbox), button->icon,

- "expand", TRUE,

- NULL);

- break;

- default:

- g_assert_not_reached ();

- return;

- }

- }

-

- sidebar->priv->mode = mode;

-

- gtk_widget_queue_resize (GTK_WIDGET (sidebar));

-}

-

-

-E_MAKE_TYPE (e_sidebar, "ESidebar", ESidebar, class_init, init, PARENT_TYPE)