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PIKApp/libpikawidgets/pikacellrenderercolor.c

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/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* pikacellrenderercolor.c
* Copyright (C) 2004,2007 Sven Neuman <sven1@gimp.org>
*
* 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 3 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 Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "pikawidgetstypes.h"
#include "pikacairo-utils.h"
#include "pikacellrenderercolor.h"
/**
* SECTION: pikacellrenderercolor
* @title: PikaCellRendererColor
* @short_description: A #GtkCellRenderer to display a #PikaRGB color.
*
* A #GtkCellRenderer to display a #PikaRGB color.
**/
#define DEFAULT_ICON_SIZE GTK_ICON_SIZE_MENU
enum
{
PROP_0,
PROP_COLOR,
PROP_OPAQUE,
PROP_SIZE
};
struct _PikaCellRendererColorPrivate
{
PikaRGB color;
gboolean opaque;
GtkIconSize size;
gint border;
};
#define GET_PRIVATE(obj) (((PikaCellRendererColor *) (obj))->priv)
static void pika_cell_renderer_color_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void pika_cell_renderer_color_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void pika_cell_renderer_color_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *rectangle,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void pika_cell_renderer_color_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
G_DEFINE_TYPE_WITH_PRIVATE (PikaCellRendererColor, pika_cell_renderer_color,
GTK_TYPE_CELL_RENDERER)
#define parent_class pika_cell_renderer_color_parent_class
static void
pika_cell_renderer_color_class_init (PikaCellRendererColorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
object_class->get_property = pika_cell_renderer_color_get_property;
object_class->set_property = pika_cell_renderer_color_set_property;
cell_class->get_size = pika_cell_renderer_color_get_size;
cell_class->render = pika_cell_renderer_color_render;
g_object_class_install_property (object_class, PROP_COLOR,
g_param_spec_boxed ("color",
"Color",
"The displayed color",
PIKA_TYPE_RGB,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_OPAQUE,
g_param_spec_boolean ("opaque",
"Opaque",
"Whether to show transparency",
TRUE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_SIZE,
g_param_spec_int ("icon-size",
"Icon Size",
"The cell's size",
0, G_MAXINT,
DEFAULT_ICON_SIZE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
pika_cell_renderer_color_init (PikaCellRendererColor *cell)
{
cell->priv = pika_cell_renderer_color_get_instance_private (cell);
pika_rgba_set (&cell->priv->color, 0.0, 0.0, 0.0, 1.0);
}
static void
pika_cell_renderer_color_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
PikaCellRendererColorPrivate *private = GET_PRIVATE (object);
switch (param_id)
{
case PROP_COLOR:
g_value_set_boxed (value, &private->color);
break;
case PROP_OPAQUE:
g_value_set_boolean (value, private->opaque);
break;
case PROP_SIZE:
g_value_set_int (value, private->size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
pika_cell_renderer_color_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
PikaCellRendererColorPrivate *private = GET_PRIVATE (object);
PikaRGB *color;
switch (param_id)
{
case PROP_COLOR:
color = g_value_get_boxed (value);
private->color = *color;
break;
case PROP_OPAQUE:
private->opaque = g_value_get_boolean (value);
break;
case PROP_SIZE:
private->size = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
pika_cell_renderer_color_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
PikaCellRendererColorPrivate *private = GET_PRIVATE (cell);
gint calc_width;
gint calc_height;
gfloat xalign;
gfloat yalign;
gint xpad;
gint ypad;
gtk_icon_size_lookup (private->size, &calc_width, &calc_height);
gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
if (cell_area && calc_width > 0 && calc_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) + xpad;
}
if (y_offset)
{
*y_offset = (yalign * (cell_area->height - calc_height));
*y_offset = MAX (*y_offset, 0) + ypad;
}
}
else
{
if (x_offset)
*x_offset = 0;
if (y_offset)
*y_offset = 0;
}
if (width)
*width = calc_width + 2 * xpad;
if (height)
*height = calc_height + 2 * ypad;
}
static void
pika_cell_renderer_color_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
PikaCellRendererColorPrivate *private = GET_PRIVATE (cell);
GdkRectangle rect;
gint xpad;
gint ypad;
pika_cell_renderer_color_get_size (cell, widget, cell_area,
&rect.x,
&rect.y,
&rect.width,
&rect.height);
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
rect.x += cell_area->x + xpad;
rect.y += cell_area->y + ypad;
rect.width -= 2 * xpad;
rect.height -= 2 * ypad;
if (rect.width > 2 && rect.height > 2)
{
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkStateFlags state;
GdkRGBA color;
cairo_rectangle (cr,
rect.x + 1, rect.y + 1,
rect.width - 2, rect.height - 2);
pika_cairo_set_source_rgb (cr, &private->color);
cairo_fill (cr);
if (! private->opaque && private->color.a < 1.0)
{
cairo_pattern_t *pattern;
cairo_move_to (cr, rect.x + 1, rect.y + rect.height - 1);
cairo_line_to (cr, rect.x + rect.width - 1, rect.y + rect.height - 1);
cairo_line_to (cr, rect.x + rect.width - 1, rect.y + 1);
cairo_close_path (cr);
pattern = pika_cairo_checkerboard_create (cr,
PIKA_CHECK_SIZE_SM,
NULL, NULL);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_fill_preserve (cr);
pika_cairo_set_source_rgba (cr, &private->color);
cairo_fill (cr);
}
/* draw border */
cairo_rectangle (cr,
rect.x + 0.5, rect.y + 0.5,
rect.width - 1, rect.height - 1);
state = gtk_cell_renderer_get_state (cell, widget, flags);
cairo_set_line_width (cr, 1);
gtk_style_context_get_color (context, state, &color);
gdk_cairo_set_source_rgba (cr, &color);
cairo_stroke (cr);
}
}
/**
* pika_cell_renderer_color_new:
*
* Creates a #GtkCellRenderer that displays a color.
*
* Returns: a new #PikaCellRendererColor
*
* Since: 2.2
**/
GtkCellRenderer *
pika_cell_renderer_color_new (void)
{
return g_object_new (PIKA_TYPE_CELL_RENDERER_COLOR, NULL);
}
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