path: root/e-util/e-cell-renderer-color.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-cell-renderer-color.c
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU Lesser 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 Lesser 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.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-cell-renderer-color.h"

#include <string.h>
#include <glib/gi18n-lib.h>

#define E_CELL_RENDERER_COLOR_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_CELL_RENDERER_COLOR, ECellRendererColorPrivate))

enum {
    PROP_0,
    PROP_COLOR
};

struct _ECellRendererColorPrivate {
    GdkColor *color;
};

G_DEFINE_TYPE (
    ECellRendererColor,
    e_cell_renderer_color,
    GTK_TYPE_CELL_RENDERER)

static void
cell_renderer_color_get_size (GtkCellRenderer *cell,
                              GtkWidget *widget,
                              const GdkRectangle *cell_area,
                              gint *x_offset,
                              gint *y_offset,
                              gint *width,
                              gint *height)
{
    gint color_width  = 16;
    gint color_height = 16;
    gint calc_width;
    gint calc_height;
    gfloat xalign;
    gfloat yalign;
    guint xpad;
    guint ypad;

    g_object_get (
        cell, "xalign", &xalign, "yalign", &yalign,
        "xpad", &xpad, "ypad", &ypad, NULL);

    calc_width  = (gint) xpad * 2 + color_width;
    calc_height = (gint) ypad * 2 + color_height;

    if (cell_area && color_width > 0 && color_height > 0) {
        if (x_offset) {
            *x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
                    (1.0 - xalign) : xalign) *
                    (cell_area->width - calc_width));
            *x_offset = MAX (*x_offset, 0);
        }

        if (y_offset) {
            *y_offset =(yalign *
                (cell_area->height - calc_height));
            *y_offset = MAX (*y_offset, 0);
        }
    } else {
        if (x_offset) *x_offset = 0;
        if (y_offset) *y_offset = 0;
    }

    if (width)
        *width = calc_width;

    if (height)
        *height = calc_height;
}

static void
cell_renderer_color_render (GtkCellRenderer *cell,
                            cairo_t *cr,
                            GtkWidget *widget,
                            const GdkRectangle *background_area,
                            const GdkRectangle *cell_area,
                            GtkCellRendererState flags)
{
    ECellRendererColorPrivate *priv;
    GdkRectangle pix_rect;
    GdkRectangle draw_rect;
    GdkRGBA rgba;
    guint xpad;
    guint ypad;

    priv = E_CELL_RENDERER_COLOR_GET_PRIVATE (cell);

    if (priv->color == NULL)
        return;

    cell_renderer_color_get_size (
        cell, widget, cell_area,
        &pix_rect.x, &pix_rect.y,
        &pix_rect.width, &pix_rect.height);

    g_object_get (cell, "xpad", &xpad, "ypad", &ypad, NULL);

    pix_rect.x += cell_area->x + xpad;
    pix_rect.y += cell_area->y + ypad;
    pix_rect.width  -= xpad * 2;
    pix_rect.height -= ypad * 2;

    if (!gdk_rectangle_intersect (cell_area, &pix_rect, &draw_rect))
        return;

    rgba.red = priv->color->red / 65535.0;
    rgba.green = priv->color->green / 65535.0;
    rgba.blue = priv->color->blue / 65535.0;
    rgba.alpha = 1.0;

    gdk_cairo_set_source_rgba (cr, &rgba);
    cairo_rectangle (cr, pix_rect.x, pix_rect.y, draw_rect.width, draw_rect.height);

    cairo_fill (cr);
}

static void
cell_renderer_color_set_property (GObject *object,
                                  guint property_id,
                                  const GValue *value,
                                  GParamSpec *pspec)
{
    ECellRendererColorPrivate *priv;

    priv = E_CELL_RENDERER_COLOR_GET_PRIVATE (object);

    switch (property_id) {
        case PROP_COLOR:
            if (priv->color != NULL)
                gdk_color_free (priv->color);
            priv->color = g_value_dup_boxed (value);
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cell_renderer_color_get_property (GObject *object,
                                  guint property_id,
                                  GValue *value,
                                  GParamSpec *pspec)
{
    ECellRendererColorPrivate *priv;

    priv = E_CELL_RENDERER_COLOR_GET_PRIVATE (object);

    switch (property_id) {
        case PROP_COLOR:
            g_value_set_boxed (value, priv->color);
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cell_renderer_color_finalize (GObject *object)
{
    ECellRendererColorPrivate *priv;

    priv = E_CELL_RENDERER_COLOR_GET_PRIVATE (object);

    if (priv->color != NULL)
        gdk_color_free (priv->color);

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

static void
e_cell_renderer_color_class_init (ECellRendererColorClass *class)
{
    GObjectClass *object_class;
    GtkCellRendererClass *cell_class;

    g_type_class_add_private (class, sizeof (ECellRendererColorPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = cell_renderer_color_set_property;
    object_class->get_property = cell_renderer_color_get_property;
    object_class->finalize = cell_renderer_color_finalize;

    cell_class = GTK_CELL_RENDERER_CLASS (class);
    cell_class->get_size = cell_renderer_color_get_size;
    cell_class->render = cell_renderer_color_render;

    g_object_class_install_property (
        object_class,
        PROP_COLOR,
        g_param_spec_boxed (
            "color",
            "Color Info",
            "The color to render",
            GDK_TYPE_COLOR,
            G_PARAM_READWRITE));
}

static void
e_cell_renderer_color_init (ECellRendererColor *cellcolor)
{
    cellcolor->priv = E_CELL_RENDERER_COLOR_GET_PRIVATE (cellcolor);

    g_object_set (cellcolor, "xpad", 4, NULL);
}

/**
 * e_cell_renderer_color_new:
 *
 * Since: 2.22
 **/
GtkCellRenderer *
e_cell_renderer_color_new (void)
{
    return g_object_new (E_TYPE_CELL_RENDERER_COLOR, NULL);
}