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gimp/libgimpwidgets/gimpcellrenderertoggle.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcellrenderertoggle.c
* Copyright (C) 2003-2004 Sven Neumann <sven@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 <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "gimpwidgetstypes.h"
#include "gimpwidgetsmarshal.h"
#include "gimpcellrenderertoggle.h"
/**
* SECTION: gimpcellrenderertoggle
* @title: GimpCellRendererToggle
* @short_description: A #GtkCellRendererToggle that displays icons instead
* of a checkbox.
*
* A #GtkCellRendererToggle that displays icons instead of a checkbox.
**/
#define DEFAULT_ICON_SIZE 16
enum
{
CLICKED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_ICON_NAME,
PROP_ICON_SIZE,
PROP_OVERRIDE_BACKGROUND
};
struct _GimpCellRendererTogglePrivate
{
gchar *icon_name;
gint icon_size;
gboolean override_background;
GdkPixbuf *pixbuf;
};
#define GET_PRIVATE(obj) (((GimpCellRendererToggle *) (obj))->priv)
static void gimp_cell_renderer_toggle_finalize (GObject *object);
static void gimp_cell_renderer_toggle_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gimp_cell_renderer_toggle_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *rectangle,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void gimp_cell_renderer_toggle_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
static gboolean gimp_cell_renderer_toggle_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
static void gimp_cell_renderer_toggle_create_pixbuf (GimpCellRendererToggle *toggle,
GtkWidget *widget);
G_DEFINE_TYPE_WITH_PRIVATE (GimpCellRendererToggle, gimp_cell_renderer_toggle,
GTK_TYPE_CELL_RENDERER_TOGGLE)
#define parent_class gimp_cell_renderer_toggle_parent_class
static guint toggle_cell_signals[LAST_SIGNAL] = { 0 };
static void
gimp_cell_renderer_toggle_class_init (GimpCellRendererToggleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
toggle_cell_signals[CLICKED] =
g_signal_new ("clicked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpCellRendererToggleClass, clicked),
NULL, NULL,
_gimp_widgets_marshal_VOID__STRING_FLAGS,
G_TYPE_NONE, 2,
G_TYPE_STRING,
GDK_TYPE_MODIFIER_TYPE);
object_class->finalize = gimp_cell_renderer_toggle_finalize;
object_class->get_property = gimp_cell_renderer_toggle_get_property;
object_class->set_property = gimp_cell_renderer_toggle_set_property;
cell_class->get_size = gimp_cell_renderer_toggle_get_size;
cell_class->render = gimp_cell_renderer_toggle_render;
cell_class->activate = gimp_cell_renderer_toggle_activate;
g_object_class_install_property (object_class, PROP_ICON_NAME,
g_param_spec_string ("icon-name",
"Icon Name",
"The icon to display",
NULL,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_ICON_SIZE,
g_param_spec_int ("icon-size",
"Icon Size",
"The desired icon size to use in pixel (before applying scaling factor)",
0, G_MAXINT,
DEFAULT_ICON_SIZE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_OVERRIDE_BACKGROUND,
g_param_spec_boolean ("override-background",
"Override Background",
"Draw the background if the row is selected",
FALSE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
gimp_cell_renderer_toggle_init (GimpCellRendererToggle *toggle)
{
toggle->priv = gimp_cell_renderer_toggle_get_instance_private (toggle);
}
static void
gimp_cell_renderer_toggle_finalize (GObject *object)
{
GimpCellRendererTogglePrivate *priv = GET_PRIVATE (object);
g_clear_pointer (&priv->icon_name, g_free);
g_clear_object (&priv->pixbuf);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_cell_renderer_toggle_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GimpCellRendererTogglePrivate *priv = GET_PRIVATE (object);
switch (param_id)
{
case PROP_ICON_NAME:
g_value_set_string (value, priv->icon_name);
break;
case PROP_ICON_SIZE:
g_value_set_int (value, priv->icon_size);
break;
case PROP_OVERRIDE_BACKGROUND:
g_value_set_boolean (value, priv->override_background);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gimp_cell_renderer_toggle_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCellRendererTogglePrivate *priv = GET_PRIVATE (object);
switch (param_id)
{
case PROP_ICON_NAME:
if (priv->icon_name)
g_free (priv->icon_name);
priv->icon_name = g_value_dup_string (value);
break;
case PROP_ICON_SIZE:
priv->icon_size = g_value_get_int (value);
break;
case PROP_OVERRIDE_BACKGROUND:
priv->override_background = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
g_clear_object (&priv->pixbuf);
}
static void
gimp_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GimpCellRendererToggle *toggle = GIMP_CELL_RENDERER_TOGGLE (cell);
GimpCellRendererTogglePrivate *priv = GET_PRIVATE (cell);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder border;
gint scale_factor;
gint calc_width;
gint calc_height;
gint pixbuf_width;
gint pixbuf_height;
gfloat xalign;
gfloat yalign;
gint xpad;
gint ypad;
scale_factor = gtk_widget_get_scale_factor (widget);
if (! priv->icon_name)
{
GTK_CELL_RENDERER_CLASS (parent_class)->get_size (cell,
widget,
cell_area,
x_offset, y_offset,
width, height);
return;
}
gtk_style_context_save (context);
gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
if (! priv->pixbuf)
gimp_cell_renderer_toggle_create_pixbuf (toggle, widget);
pixbuf_width = gdk_pixbuf_get_width (priv->pixbuf);
pixbuf_height = gdk_pixbuf_get_height (priv->pixbuf);
/* The pixbuf size may be bigger than the logical size. */
calc_width = pixbuf_width / scale_factor + (gint) xpad * 2;
calc_height = pixbuf_height / scale_factor + (gint) ypad * 2;
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
gtk_style_context_get_border (context, 0, &border);
calc_width += border.left + border.right;
calc_height += border.top + border.bottom;
if (width)
*width = calc_width;
if (height)
*height = calc_height;
if (cell_area)
{
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);
}
}
gtk_style_context_restore (context);
}
static void
gimp_cell_renderer_toggle_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GimpCellRendererTogglePrivate *priv = GET_PRIVATE (cell);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GdkRectangle toggle_rect;
GtkStateFlags state;
gboolean active;
gint scale_factor;
gint xpad;
gint ypad;
scale_factor = gtk_widget_get_scale_factor (widget);
if (! priv->icon_name)
{
GTK_CELL_RENDERER_CLASS (parent_class)->render (cell, cr, widget,
background_area,
cell_area,
flags);
return;
}
if ((flags & GTK_CELL_RENDERER_SELECTED) &&
priv->override_background)
{
gboolean background_set;
g_object_get (cell,
"cell-background-set", &background_set,
NULL);
if (background_set)
{
GdkRGBA *color;
g_object_get (cell,
"cell-background-rgba", &color,
NULL);
gdk_cairo_rectangle (cr, background_area);
gdk_cairo_set_source_rgba (cr, color);
cairo_fill (cr);
gdk_rgba_free (color);
}
}
gimp_cell_renderer_toggle_get_size (cell, widget, cell_area,
&toggle_rect.x,
&toggle_rect.y,
&toggle_rect.width,
&toggle_rect.height);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
gtk_style_context_add_class (context, "toggle-icon");
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
toggle_rect.x += cell_area->x + xpad;
toggle_rect.y += cell_area->y + ypad;
toggle_rect.width -= xpad * 2;
toggle_rect.height -= ypad * 2;
if (toggle_rect.width <= 0 || toggle_rect.height <= 0)
return;
state = gtk_cell_renderer_get_state (cell, widget, flags);
active =
gtk_cell_renderer_toggle_get_active (GTK_CELL_RENDERER_TOGGLE (cell));
if (active)
{
gtk_style_context_add_class (context, "visible");
state |= GTK_STATE_FLAG_ACTIVE;
}
if (! gtk_cell_renderer_toggle_get_activatable (GTK_CELL_RENDERER_TOGGLE (cell)))
state |= GTK_STATE_FLAG_INSENSITIVE;
gtk_style_context_set_state (context, state);
if (state & GTK_STATE_FLAG_PRELIGHT)
gtk_render_frame (context, cr,
toggle_rect.x, toggle_rect.y,
toggle_rect.width, toggle_rect.height);
if (active)
{
GtkBorder border;
gboolean inconsistent;
gtk_style_context_get_border (context, 0, &border);
toggle_rect.x += border.left;
toggle_rect.x *= scale_factor;
toggle_rect.y += border.top;
toggle_rect.y *= scale_factor;
toggle_rect.width -= border.left + border.right;
toggle_rect.height -= border.top + border.bottom;
/* For high DPI displays, pixbuf size is bigger than logical size. */
cairo_scale (cr, (gdouble) 1.0 / scale_factor, (gdouble) 1.0 / scale_factor);
gdk_cairo_set_source_pixbuf (cr, priv->pixbuf,
toggle_rect.x, toggle_rect.y);
cairo_paint (cr);
g_object_get (cell,
"inconsistent", &inconsistent,
NULL);
if (inconsistent)
{
GdkRGBA color;
gtk_style_context_get_color (context, state, &color);
gdk_cairo_set_source_rgba (cr, &color);
cairo_set_line_width (cr, scale_factor * 1.5);
cairo_move_to (cr,
toggle_rect.x + scale_factor * (toggle_rect.width - 1),
toggle_rect.y + scale_factor);
cairo_line_to (cr,
toggle_rect.x + scale_factor,
toggle_rect.y + scale_factor * (toggle_rect.height - 1));
cairo_stroke (cr);
}
}
gtk_style_context_restore (context);
}
static gboolean
gimp_cell_renderer_toggle_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererToggle *toggle = GTK_CELL_RENDERER_TOGGLE (cell);
if (gtk_cell_renderer_toggle_get_activatable (toggle))
{
GdkModifierType state = 0;
if (event && ((GdkEventAny *) event)->type == GDK_BUTTON_PRESS)
state = ((GdkEventButton *) event)->state;
gimp_cell_renderer_toggle_clicked (GIMP_CELL_RENDERER_TOGGLE (cell),
path, state);
return TRUE;
}
return FALSE;
}
static void
gimp_cell_renderer_toggle_create_pixbuf (GimpCellRendererToggle *toggle,
GtkWidget *widget)
{
GimpCellRendererTogglePrivate *priv = GET_PRIVATE (toggle);
g_clear_object (&priv->pixbuf);
if (priv->icon_name)
{
GdkPixbuf *pixbuf;
GdkScreen *screen;
GtkIconTheme *icon_theme;
GtkIconInfo *icon_info;
gchar *icon_name;
gint scale_factor;
scale_factor = gtk_widget_get_scale_factor (widget);
screen = gtk_widget_get_screen (widget);
icon_theme = gtk_icon_theme_get_for_screen (screen);
/* Look for symbolic and fallback to color icon. */
icon_name = g_strdup_printf ("%s-symbolic", priv->icon_name);
icon_info = gtk_icon_theme_lookup_icon_for_scale (icon_theme, icon_name,
priv->icon_size, scale_factor,
GTK_ICON_LOOKUP_GENERIC_FALLBACK);
g_free (icon_name);
if (! icon_info)
{
icon_info = gtk_icon_theme_lookup_icon_for_scale (icon_theme, "image-missing",
priv->icon_size, scale_factor,
GTK_ICON_LOOKUP_GENERIC_FALLBACK |
GTK_ICON_LOOKUP_USE_BUILTIN);
}
g_return_if_fail (icon_info != NULL);
pixbuf = gtk_icon_info_load_symbolic_for_context (icon_info,
gtk_widget_get_style_context (widget),
NULL, NULL);
priv->pixbuf = pixbuf;
g_object_unref (icon_info);
}
}
/**
* gimp_cell_renderer_toggle_new:
* @icon_name: the icon name of the icon to use for the active state
*
* Creates a custom version of the #GtkCellRendererToggle. Instead of
* showing the standard toggle button, it shows a named icon if the
* cell is active and no icon otherwise. This cell renderer is for
* example used in the Layers treeview to indicate and control the
* layer's visibility by showing %GIMP_STOCK_VISIBLE.
*
* Returns: a new #GimpCellRendererToggle
*
* Since: 2.2
**/
GtkCellRenderer *
gimp_cell_renderer_toggle_new (const gchar *icon_name)
{
return g_object_new (GIMP_TYPE_CELL_RENDERER_TOGGLE,
"icon-name", icon_name,
NULL);
}
/**
* gimp_cell_renderer_toggle_clicked:
* @cell: a #GimpCellRendererToggle
* @path: the path to the clicked row
* @state: the modifier state
*
* Emits the "clicked" signal from a #GimpCellRendererToggle.
*
* Since: 2.2
**/
void
gimp_cell_renderer_toggle_clicked (GimpCellRendererToggle *cell,
const gchar *path,
GdkModifierType state)
{
g_return_if_fail (GIMP_IS_CELL_RENDERER_TOGGLE (cell));
g_return_if_fail (path != NULL);
g_signal_emit (cell, toggle_cell_signals[CLICKED], 0, path, state);
}
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