src/libgdl/gdl-dock-item-button-image.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * gdl-dock-item-button-image.c
 *
 * Author: Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "gdl-dock-item-button-image.h"

#include <math.h>

#define ICON_SIZE 12

G_DEFINE_TYPE (GdlDockItemButtonImage,
               gdl_dock_item_button_image,
               GTK_TYPE_WIDGET);

static gint
gdl_dock_item_button_image_expose (GtkWidget      *widget,
                                   GdkEventExpose *event)
{
    GdlDockItemButtonImage *button_image;
    GtkStyle *style;
    GdkColor *color;

    g_return_val_if_fail (widget != NULL, 0);
    button_image = GDL_DOCK_ITEM_BUTTON_IMAGE (widget);

    cairo_t *cr = gdk_cairo_create (event->window);
    cairo_translate (cr, event->area.x, event->area.y);

    /* Set up the pen */
    cairo_set_line_width(cr, 1.0);

    style = gtk_widget_get_style (widget);
    g_return_val_if_fail (style != NULL, 0);
    color = &style->fg[GTK_STATE_NORMAL];
    cairo_set_source_rgba(cr, color->red / 65535.0,
        color->green / 65535.0, color->blue / 65535.0, 0.55);

    /* Draw the icon border */
    cairo_move_to (cr, 10.5, 2.5);
    cairo_arc (cr, 10.5, 4.5, 2, -0.5 * M_PI, 0);
    cairo_line_to (cr, 12.5, 10.5);
    cairo_arc (cr, 10.5, 10.5, 2, 0, 0.5 * M_PI);
    cairo_line_to (cr, 4.5, 12.5);
    cairo_arc (cr, 4.5, 10.5, 2, 0.5 * M_PI, M_PI);
    cairo_line_to (cr, 2.5, 4.5);
    cairo_arc (cr, 4.5, 4.5, 2, M_PI, 1.5 * M_PI);
    cairo_close_path (cr);

    cairo_stroke (cr);

    /* Draw the icon */
    cairo_new_path (cr);

    switch(button_image->image_type) {
    case GDL_DOCK_ITEM_BUTTON_IMAGE_CLOSE:
        cairo_move_to (cr, 4.0, 5.5);
        cairo_line_to (cr, 4.0, 5.5);
        cairo_line_to (cr, 6.0, 7.5);
        cairo_line_to (cr, 4.0, 9.5);
        cairo_line_to (cr, 5.5, 11.0);
        cairo_line_to (cr, 7.5, 9.0);
        cairo_line_to (cr, 9.5, 11.0);
        cairo_line_to (cr, 11.0, 9.5);
        cairo_line_to (cr, 9.0, 7.5);
        cairo_line_to (cr, 11.0, 5.5);
        cairo_line_to (cr, 9.5, 4.0);
        cairo_line_to (cr, 7.5, 6.0);
        cairo_line_to (cr, 5.5, 4.0);
        cairo_close_path (cr);
        break;

    case GDL_DOCK_ITEM_BUTTON_IMAGE_ICONIFY:
        if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL) {
            cairo_move_to (cr, 4.5, 7.5);
            cairo_line_to (cr, 10.0, 4.75);
            cairo_line_to (cr, 10.0, 10.25);
            cairo_close_path (cr);
        } else {
            cairo_move_to (cr, 10.5, 7.5);
            cairo_line_to (cr, 5, 4.75);
            cairo_line_to (cr, 5, 10.25);
            cairo_close_path (cr);
        }
        break;

    default:
        break;
    }

    cairo_fill (cr);

    /* Finish up */
    cairo_destroy (cr);

    return 0;
}

static void
gdl_dock_item_button_image_init (
    GdlDockItemButtonImage *button_image)
{
    gtk_widget_set_has_window (GTK_WIDGET (button_image), FALSE);
}

static void
gdl_dock_item_button_image_size_request (GtkWidget      *widget,
                                         GtkRequisition *requisition)
{
    g_return_if_fail (GDL_IS_DOCK_ITEM_BUTTON_IMAGE (widget));
    g_return_if_fail (requisition != NULL);

    requisition->width = ICON_SIZE;
    requisition->height = ICON_SIZE;
}

static void
gdl_dock_item_button_image_class_init (
    GdlDockItemButtonImageClass *klass)
{
    //GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
    //GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (klass);
    GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

    widget_class->expose_event =
        gdl_dock_item_button_image_expose;
    widget_class->size_request =
        gdl_dock_item_button_image_size_request;
}

/* ----- Public interface ----- */

/**
 * gdl_dock_item_button_image_new:
 * @image_type: Specifies what type of image the widget should
 * display
 *
 * Creates a new GDL dock button image object.
 * Returns: The newly created dock item button image widget.
 **/
GtkWidget*
gdl_dock_item_button_image_new (GdlDockItemButtonImageType image_type)
{
    GdlDockItemButtonImage *button_image = g_object_new (
        GDL_TYPE_DOCK_ITEM_BUTTON_IMAGE, NULL);
    button_image->image_type = image_type;

    return GTK_WIDGET (button_image);
}