path: root/widgets/misc/e-icon-entry.c

/*
 *  e-icon-entry.c
 *
 *  Author: Johnny Jacob <jjohnny@novell.com>
 *
 *  Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 *  Copyright (C) 2003, 2004, 2005  Christian Persch
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the
 *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 *  Adapted and modified from gtk+ code:
 *
 *  Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *  Modified by the GTK+ Team and others 1997-2005.  See the AUTHORS
 *  file in the gtk+ distribution for a list of people on the GTK+ Team.
 *  See the ChangeLog in the gtk+ distribution files for a list of changes.
 *  These files are distributed with GTK+ at ftp://ftp.gtk.org/pub/gtk/.
 *
 */

#include "e-icon-entry.h"

#define E_ICON_ENTRY_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_ICON_ENTRY, EIconEntryPrivate))

struct _EIconEntryPrivate {
    GtkWidget *entry;
    GtkWidget *hbox;
};

static gpointer parent_class;

static void
icon_entry_proxy_set_cursor (GtkWidget *widget,
                             GdkEventCrossing *event)
{
    if (event->type == GDK_ENTER_NOTIFY) {
        GdkCursor *cursor;

        cursor = gdk_cursor_new (GDK_HAND1);
        gdk_window_set_cursor (widget->window, cursor);
        gdk_cursor_unref (cursor);
    } else
        gdk_window_set_cursor (widget->window, NULL);
}

static GtkWidget *
icon_entry_create_proxy (GtkAction *action)
{
    GtkWidget *proxy;
    GtkWidget *widget;

    proxy = gtk_event_box_new ();
    gtk_event_box_set_visible_window (GTK_EVENT_BOX (proxy), FALSE);
    gtk_container_set_border_width (GTK_CONTAINER (proxy), 2);
    gtk_action_connect_proxy (action, proxy);

    widget = gtk_action_create_icon (action, GTK_ICON_SIZE_MENU);
    gtk_container_add (GTK_CONTAINER (proxy), widget);
    gtk_widget_show (widget);

    g_signal_connect_swapped (
        proxy, "button-press-event",
        G_CALLBACK (gtk_action_activate), action);
    g_signal_connect_after (
        proxy, "enter-notify-event",
        G_CALLBACK (icon_entry_proxy_set_cursor), NULL);
    g_signal_connect_after (
        proxy, "leave-notify-event",
        G_CALLBACK (icon_entry_proxy_set_cursor), NULL);

    return proxy;
}
static gboolean
icon_entry_focus_change_cb (GtkWidget *widget,
                    GdkEventFocus *event,
                    GtkWidget *entry)
{
    gtk_widget_queue_draw (entry);

    return FALSE;
}

static void
icon_entry_get_borders (GtkWidget *widget,
            GtkWidget *entry,
            gint *xborder,
            gint *yborder)
{
    gint focus_width;
    gboolean interior_focus;

    g_return_if_fail (entry->style != NULL);

    gtk_widget_style_get (
        entry, "focus-line-width", &focus_width,
        "interior-focus", &interior_focus, NULL);

    *xborder = entry->style->xthickness;
    *yborder = entry->style->ythickness;

    if (!interior_focus) {
        *xborder += focus_width;
        *yborder += focus_width;
    }
}

static void
icon_entry_paint (GtkWidget *widget,
               GdkEventExpose *event)
{
    EIconEntry *entry = E_ICON_ENTRY (widget);
    GtkWidget *entry_widget = entry->priv->entry;
    int x = 0, y = 0, width, height, focus_width;
    gboolean interior_focus;

    gtk_widget_style_get (entry_widget,
                  "interior-focus", &interior_focus,
                  "focus-line-width", &focus_width,
                  NULL);

    gdk_drawable_get_size (widget->window, &width, &height);

    if (GTK_WIDGET_HAS_FOCUS (entry_widget) && !interior_focus)
    {
        x += focus_width;
        y += focus_width;
        width -= 2 * focus_width;
        height -= 2 * focus_width;
    }

    gtk_paint_flat_box (entry_widget->style, widget->window,
                GTK_WIDGET_STATE (entry_widget), GTK_SHADOW_NONE,
                NULL, entry_widget, "entry_bg",
                /* FIXME: was 0, 0 in gtk_entry_expose, but I think this is correct: */
                x, y, width, height);

    gtk_paint_shadow (entry_widget->style, widget->window,
              GTK_STATE_NORMAL, GTK_SHADOW_IN,
              NULL, entry_widget, "entry",
              x, y, width, height);

    if (GTK_WIDGET_HAS_FOCUS (entry_widget) && !interior_focus)
    {
        x -= focus_width;
        y -= focus_width;
        width += 2 * focus_width;
        height += 2 * focus_width;

        gtk_paint_focus (entry_widget->style, widget->window,
                 GTK_WIDGET_STATE (entry_widget),
                 NULL, entry_widget, "entry",
                 /* FIXME: was 0, 0 in gtk_entry_draw_frame, but I think this is correct: */
                 x, y, width, height);
    }
}

static void
icon_entry_dispose (GObject *object)
{
    EIconEntryPrivate *priv;

    priv = E_ICON_ENTRY_GET_PRIVATE (object);

    if (priv->entry != NULL) {
        g_object_unref (priv->entry);
        priv->entry = NULL;
    }

    if (priv->hbox != NULL) {
        g_object_unref (priv->hbox);
        priv->hbox = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (parent_class)->dispose (object);
}

static void
icon_entry_realize (GtkWidget *widget)
{
    GdkWindowAttr attributes;
    gint attributes_mask;
    gint border_width;

    GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);

    border_width = GTK_CONTAINER (widget)->border_width;

    attributes.x = widget->allocation.x + border_width;
    attributes.y = widget->allocation.y + border_width;
    attributes.width = widget->allocation.width - 2 * border_width;
    attributes.height = widget->allocation.height - 2 * border_width;
    attributes.window_type = GDK_WINDOW_CHILD;
    attributes.event_mask = gtk_widget_get_events (widget)
                | GDK_EXPOSURE_MASK;

    attributes.visual = gtk_widget_get_visual (widget);
    attributes.colormap = gtk_widget_get_colormap (widget);
    attributes.wclass = GDK_INPUT_OUTPUT;
    attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;

    widget->window = gdk_window_new (
        gtk_widget_get_parent_window (widget),
        &attributes, attributes_mask);

    gdk_window_set_user_data (widget->window, widget);

    widget->style = gtk_style_attach (widget->style, widget->window);

    gtk_style_set_background (
        widget->style, widget->window, GTK_STATE_NORMAL);
}

static void
icon_entry_size_request (GtkWidget *widget,
                         GtkRequisition *requisition)
{
    EIconEntryPrivate *priv;
    GtkContainer *container;
    GtkWidget *child;
    gint xborder, yborder;

    priv = E_ICON_ENTRY_GET_PRIVATE (widget);
    container = GTK_CONTAINER (widget);

    requisition->width = container->border_width * 2;
    requisition->height = container->border_width * 2;

    gtk_widget_ensure_style (priv->entry);
    icon_entry_get_borders (widget, priv->entry, &xborder, &yborder);

    child = GTK_BIN (widget)->child;
    if (GTK_WIDGET_VISIBLE (child)) {
        GtkRequisition child_requisition;

        gtk_widget_size_request (child, &child_requisition);
        requisition->width += child_requisition.width;
        requisition->height += child_requisition.height;
    }

    requisition->width += 2 * xborder;
    requisition->height += 2 * yborder;
}

static void
icon_entry_size_allocate (GtkWidget *widget,
                          GtkAllocation *allocation)
{
    EIconEntryPrivate *priv;
    GtkContainer *container;
    GtkAllocation child_allocation;
    gint xborder, yborder;
    gint width, height;

    priv = E_ICON_ENTRY_GET_PRIVATE (widget);
    container = GTK_CONTAINER (widget);

    widget->allocation = *allocation;

    icon_entry_get_borders (widget, priv->entry, &xborder, &yborder);

    if (GTK_WIDGET_REALIZED (widget)) {
        width = allocation->width - container->border_width * 2;
        height = allocation->height - container->border_width * 2;

        child_allocation.x = container->border_width;
        child_allocation.y = container->border_width;
        child_allocation.width = MAX (width, 0);
        child_allocation.height = MAX (height, 0);

        gdk_window_move_resize (
            widget->window,
            allocation->x + child_allocation.x,
            allocation->y + child_allocation.y,
            child_allocation.width,
            child_allocation.height);
    }

    width = allocation->width - (container->border_width + xborder) * 2;
    height = allocation->height - (container->border_width + yborder) * 2;

    child_allocation.x = container->border_width + xborder;
    child_allocation.y = container->border_width + yborder;
    child_allocation.width = MAX (width, 0);
    child_allocation.height = MAX (height, 0);

    gtk_widget_size_allocate (GTK_BIN (widget)->child, &child_allocation);
}

static gboolean
icon_entry_expose (GtkWidget *widget,
                   GdkEventExpose *event)
{
    if (GTK_WIDGET_DRAWABLE (widget) && event->window == widget->window)
        icon_entry_paint (widget, event);

    /* Chain up to parent's expose() method. */
    return GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
}

static void
icon_entry_class_init (EIconEntryClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EIconEntryPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->dispose = icon_entry_dispose;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->realize = icon_entry_realize;
    widget_class->size_request = icon_entry_size_request;
    widget_class->size_allocate = icon_entry_size_allocate;
    widget_class->expose_event = icon_entry_expose;
}

static void
icon_entry_init (EIconEntry *icon_entry)
{
    GtkWidget *widget;
    GtkWidget *container;

    icon_entry->priv = E_ICON_ENTRY_GET_PRIVATE (icon_entry);

    GTK_WIDGET_UNSET_FLAGS (icon_entry, GTK_NO_WINDOW);

    widget = gtk_hbox_new (FALSE, 0);
    gtk_container_add (GTK_CONTAINER (icon_entry), widget);
    icon_entry->priv->hbox = g_object_ref (widget);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_entry_new ();
    gtk_entry_set_has_frame (GTK_ENTRY (widget), FALSE);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    icon_entry->priv->entry = g_object_ref (widget);
    gtk_widget_show (widget);

    /* We need to queue a redraw when focus changes, to comply with
     * themes (like Clearlooks) which draw focused and unfocused
     * entries differently. */
    g_signal_connect_after (
        widget, "focus-in-event",
        G_CALLBACK (icon_entry_focus_change_cb), icon_entry);
    g_signal_connect_after (
        widget, "focus-out-event",
        G_CALLBACK (icon_entry_focus_change_cb), icon_entry);
}

GType
e_icon_entry_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0))
    {
        static const GTypeInfo type_info = {
            sizeof (EIconEntryClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) icon_entry_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EIconEntry),
            0,     /* n_preallocs */
            (GInstanceInitFunc) icon_entry_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            GTK_TYPE_BIN, "EIconEntry", &type_info, 0);
    }

    return type;
}

GtkWidget *
e_icon_entry_new (void)
{
    return GTK_WIDGET (g_object_new (E_TYPE_ICON_ENTRY, NULL));
}

GtkWidget *
e_icon_entry_get_entry (EIconEntry *icon_entry)
{
    g_return_val_if_fail (E_IS_ICON_ENTRY (icon_entry), NULL);

    return icon_entry->priv->entry;
}

void
e_icon_entry_add_action_start (EIconEntry *icon_entry,
                               GtkAction *action)
{
    GtkWidget *proxy;
    GtkBox *box;

    g_return_if_fail (E_IS_ICON_ENTRY (icon_entry));
    g_return_if_fail (GTK_IS_ACTION (action));

    box = GTK_BOX (icon_entry->priv->hbox);
    proxy = icon_entry_create_proxy (action);
    gtk_box_pack_start (box, proxy, FALSE, FALSE, 2);
    gtk_box_reorder_child (box, proxy, 0);
}

void
e_icon_entry_add_action_end (EIconEntry *icon_entry,
                             GtkAction *action)
{
    GtkWidget *proxy;
    GtkBox *box;

    g_return_if_fail (E_IS_ICON_ENTRY (icon_entry));
    g_return_if_fail (GTK_IS_ACTION (action));

    box = GTK_BOX (icon_entry->priv->hbox);
    proxy = icon_entry_create_proxy (action);
    gtk_box_pack_end (box, proxy, FALSE, FALSE, 2);
}