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gtk2/gtk/gtkcellrenderertoggle.c
Rui Matos 70970146ca cellrenderertoggle: Use the cell renderer's state flags as a base for rendering 
This allows us to pick the underlying widget's state flags that we don't
explicitly set here.
2011-12-19 19:21:15 +00:00

550 lines
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/* gtkcellrenderertoggle.c
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* 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 "config.h"
#include <stdlib.h>
#include "gtkcellrenderertoggle.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtktreeprivate.h"
#include "a11y/gtkbooleancellaccessible.h"
/**
* SECTION:gtkcellrenderertoggle
* @Short_description: Renders a toggle button in a cell
* @Title: GtkCellRendererToggle
*
* #GtkCellRendererToggle renders a toggle button in a cell. The
* button is drawn as a radio or a checkbutton, depending on the
* #GtkCellRendererToggle:radio property.
* When activated, it emits the #GtkCellRendererToggle::toggled signal.
*/
static void gtk_cell_renderer_toggle_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_toggle_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void gtk_cell_renderer_toggle_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
static gboolean gtk_cell_renderer_toggle_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
enum {
TOGGLED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_ACTIVATABLE,
PROP_ACTIVE,
PROP_RADIO,
PROP_INCONSISTENT,
PROP_INDICATOR_SIZE
};
#define TOGGLE_WIDTH 16
static guint toggle_cell_signals[LAST_SIGNAL] = { 0 };
struct _GtkCellRendererTogglePrivate
{
gint indicator_size;
guint active : 1;
guint activatable : 1;
guint inconsistent : 1;
guint radio : 1;
};
G_DEFINE_TYPE (GtkCellRendererToggle, gtk_cell_renderer_toggle, GTK_TYPE_CELL_RENDERER)
static void
gtk_cell_renderer_toggle_init (GtkCellRendererToggle *celltoggle)
{
GtkCellRendererTogglePrivate *priv;
celltoggle->priv = G_TYPE_INSTANCE_GET_PRIVATE (celltoggle,
GTK_TYPE_CELL_RENDERER_TOGGLE,
GtkCellRendererTogglePrivate);
priv = celltoggle->priv;
priv->activatable = TRUE;
priv->active = FALSE;
priv->radio = FALSE;
g_object_set (celltoggle, "mode", GTK_CELL_RENDERER_MODE_ACTIVATABLE, NULL);
gtk_cell_renderer_set_padding (GTK_CELL_RENDERER (celltoggle), 2, 2);
priv->indicator_size = TOGGLE_WIDTH;
priv->inconsistent = FALSE;
}
static void
gtk_cell_renderer_toggle_class_init (GtkCellRendererToggleClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
object_class->get_property = gtk_cell_renderer_toggle_get_property;
object_class->set_property = gtk_cell_renderer_toggle_set_property;
cell_class->get_size = gtk_cell_renderer_toggle_get_size;
cell_class->render = gtk_cell_renderer_toggle_render;
cell_class->activate = gtk_cell_renderer_toggle_activate;
g_object_class_install_property (object_class,
PROP_ACTIVE,
g_param_spec_boolean ("active",
P_("Toggle state"),
P_("The toggle state of the button"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_INCONSISTENT,
g_param_spec_boolean ("inconsistent",
P_("Inconsistent state"),
P_("The inconsistent state of the button"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_ACTIVATABLE,
g_param_spec_boolean ("activatable",
P_("Activatable"),
P_("The toggle button can be activated"),
TRUE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_RADIO,
g_param_spec_boolean ("radio",
P_("Radio state"),
P_("Draw the toggle button as a radio button"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_INDICATOR_SIZE,
g_param_spec_int ("indicator-size",
P_("Indicator size"),
P_("Size of check or radio indicator"),
0,
G_MAXINT,
TOGGLE_WIDTH,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererToggle::toggled:
* @cell_renderer: the object which received the signal
* @path: string representation of #GtkTreePath describing the
* event location
*
* The ::toggled signal is emitted when the cell is toggled.
**/
toggle_cell_signals[TOGGLED] =
g_signal_new (I_("toggled"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCellRendererToggleClass, toggled),
NULL, NULL,
_gtk_marshal_VOID__STRING,
G_TYPE_NONE, 1,
G_TYPE_STRING);
g_type_class_add_private (object_class, sizeof (GtkCellRendererTogglePrivate));
_gtk_cell_renderer_class_set_accessible_type (cell_class, GTK_TYPE_BOOLEAN_CELL_ACCESSIBLE);
}
static void
gtk_cell_renderer_toggle_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererToggle *celltoggle = GTK_CELL_RENDERER_TOGGLE (object);
GtkCellRendererTogglePrivate *priv = celltoggle->priv;
switch (param_id)
{
case PROP_ACTIVE:
g_value_set_boolean (value, priv->active);
break;
case PROP_INCONSISTENT:
g_value_set_boolean (value, priv->inconsistent);
break;
case PROP_ACTIVATABLE:
g_value_set_boolean (value, priv->activatable);
break;
case PROP_RADIO:
g_value_set_boolean (value, priv->radio);
break;
case PROP_INDICATOR_SIZE:
g_value_set_int (value, priv->indicator_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_toggle_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRendererToggle *celltoggle = GTK_CELL_RENDERER_TOGGLE (object);
GtkCellRendererTogglePrivate *priv = celltoggle->priv;
switch (param_id)
{
case PROP_ACTIVE:
priv->active = g_value_get_boolean (value);
break;
case PROP_INCONSISTENT:
priv->inconsistent = g_value_get_boolean (value);
break;
case PROP_ACTIVATABLE:
priv->activatable = g_value_get_boolean (value);
break;
case PROP_RADIO:
priv->radio = g_value_get_boolean (value);
break;
case PROP_INDICATOR_SIZE:
priv->indicator_size = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
/**
* gtk_cell_renderer_toggle_new:
*
* Creates a new #GtkCellRendererToggle. Adjust rendering
* parameters using object properties. Object properties can be set
* globally (with g_object_set()). Also, with #GtkTreeViewColumn, you
* can bind a property to a value in a #GtkTreeModel. For example, you
* can bind the "active" property on the cell renderer to a boolean value
* in the model, thus causing the check button to reflect the state of
* the model.
*
* Return value: the new cell renderer
**/
GtkCellRenderer *
gtk_cell_renderer_toggle_new (void)
{
return g_object_new (GTK_TYPE_CELL_RENDERER_TOGGLE, NULL);
}
static void
gtk_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GtkCellRendererTogglePrivate *priv;
gint calc_width;
gint calc_height;
gint xpad, ypad;
priv = GTK_CELL_RENDERER_TOGGLE (cell)->priv;
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
calc_width = xpad * 2 + priv->indicator_size;
calc_height = ypad * 2 + priv->indicator_size;
if (width)
*width = calc_width;
if (height)
*height = calc_height;
if (cell_area)
{
gfloat xalign, yalign;
gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
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;
}
}
static void
gtk_cell_renderer_toggle_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererToggle *celltoggle = GTK_CELL_RENDERER_TOGGLE (cell);
GtkCellRendererTogglePrivate *priv = celltoggle->priv;
GtkStyleContext *context;
gint width, height;
gint x_offset, y_offset;
gint xpad, ypad;
GtkStateFlags state;
context = gtk_widget_get_style_context (widget);
gtk_cell_renderer_toggle_get_size (cell, widget, cell_area,
&x_offset, &y_offset,
&width, &height);
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
width -= xpad * 2;
height -= ypad * 2;
if (width <= 0 || height <= 0)
return;
state = gtk_cell_renderer_get_state (cell, widget, flags);
if (!priv->activatable)
state |= GTK_STATE_FLAG_INSENSITIVE;
state &= ~(GTK_STATE_FLAG_INCONSISTENT | GTK_STATE_FLAG_ACTIVE);
if (priv->inconsistent)
state |= GTK_STATE_FLAG_INCONSISTENT;
else if (priv->active)
state |= GTK_STATE_FLAG_ACTIVE;
cairo_save (cr);
gdk_cairo_rectangle (cr, cell_area);
cairo_clip (cr);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
if (priv->radio)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RADIO);
gtk_render_option (context, cr,
cell_area->x + x_offset + xpad,
cell_area->y + y_offset + ypad,
width, height);
}
else
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_CHECK);
gtk_render_check (context, cr,
cell_area->x + x_offset + xpad,
cell_area->y + y_offset + ypad,
width, height);
}
gtk_style_context_restore (context);
cairo_restore (cr);
}
static gint
gtk_cell_renderer_toggle_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererTogglePrivate *priv;
GtkCellRendererToggle *celltoggle;
celltoggle = GTK_CELL_RENDERER_TOGGLE (cell);
priv = celltoggle->priv;
if (priv->activatable)
{
g_signal_emit (cell, toggle_cell_signals[TOGGLED], 0, path);
return TRUE;
}
return FALSE;
}
/**
* gtk_cell_renderer_toggle_set_radio:
* @toggle: a #GtkCellRendererToggle
* @radio: %TRUE to make the toggle look like a radio button
*
* If @radio is %TRUE, the cell renderer renders a radio toggle
* (i.e. a toggle in a group of mutually-exclusive toggles).
* If %FALSE, it renders a check toggle (a standalone boolean option).
* This can be set globally for the cell renderer, or changed just
* before rendering each cell in the model (for #GtkTreeView, you set
* up a per-row setting using #GtkTreeViewColumn to associate model
* columns with cell renderer properties).
**/
void
gtk_cell_renderer_toggle_set_radio (GtkCellRendererToggle *toggle,
gboolean radio)
{
GtkCellRendererTogglePrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (toggle));
priv = toggle->priv;
priv->radio = radio;
}
/**
* gtk_cell_renderer_toggle_get_radio:
* @toggle: a #GtkCellRendererToggle
*
* Returns whether we're rendering radio toggles rather than checkboxes.
*
* Return value: %TRUE if we're rendering radio toggles rather than checkboxes
**/
gboolean
gtk_cell_renderer_toggle_get_radio (GtkCellRendererToggle *toggle)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (toggle), FALSE);
return toggle->priv->radio;
}
/**
* gtk_cell_renderer_toggle_get_active:
* @toggle: a #GtkCellRendererToggle
*
* Returns whether the cell renderer is active. See
* gtk_cell_renderer_toggle_set_active().
*
* Return value: %TRUE if the cell renderer is active.
**/
gboolean
gtk_cell_renderer_toggle_get_active (GtkCellRendererToggle *toggle)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (toggle), FALSE);
return toggle->priv->active;
}
/**
* gtk_cell_renderer_toggle_set_active:
* @toggle: a #GtkCellRendererToggle.
* @setting: the value to set.
*
* Activates or deactivates a cell renderer.
**/
void
gtk_cell_renderer_toggle_set_active (GtkCellRendererToggle *toggle,
gboolean setting)
{
g_return_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (toggle));
g_object_set (toggle, "active", setting ? TRUE : FALSE, NULL);
}
/**
* gtk_cell_renderer_toggle_get_activatable:
* @toggle: a #GtkCellRendererToggle
*
* Returns whether the cell renderer is activatable. See
* gtk_cell_renderer_toggle_set_activatable().
*
* Return value: %TRUE if the cell renderer is activatable.
*
* Since: 2.18
**/
gboolean
gtk_cell_renderer_toggle_get_activatable (GtkCellRendererToggle *toggle)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (toggle), FALSE);
return toggle->priv->activatable;
}
/**
* gtk_cell_renderer_toggle_set_activatable:
* @toggle: a #GtkCellRendererToggle.
* @setting: the value to set.
*
* Makes the cell renderer activatable.
*
* Since: 2.18
**/
void
gtk_cell_renderer_toggle_set_activatable (GtkCellRendererToggle *toggle,
gboolean setting)
{
GtkCellRendererTogglePrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER_TOGGLE (toggle));
priv = toggle->priv;
if (priv->activatable != setting)
{
priv->activatable = setting ? TRUE : FALSE;
g_object_notify (G_OBJECT (toggle), "activatable");
}
}
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