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gtk2/gtk/gtkcellrendererspin.c
Matthias Clasen feece3c0bb Move gtkstyle and gtkrc to deprecated/ 
This required a somewhat more substantial include reshuffling.
Some typedefs have been moved to gtkiconfactory.h and to
gtksettings.h.
2011-11-02 01:15:21 -04:00

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/* GtkCellRendererSpin
* Copyright (C) 2004 Lorenzo Gil Sanchez
*
* 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 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
* Lesser 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors: Lorenzo Gil Sanchez <lgs@sicem.biz>
* Carlos Garnacho Parro <carlosg@gnome.org>
*/
#include "config.h"
#include "gtkcellrendererspin.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtkspinbutton.h"
/**
* SECTION:gtkcellrendererspin
* @Short_description: Renders a spin button in a cell
* @Title: GtkCellRendererSpin
* @See_also: #GtkCellRendererText, #GtkSpinButton
*
* #GtkCellRendererSpin renders text in a cell like #GtkCellRendererText from
* which it is derived. But while #GtkCellRendererText offers a simple entry to
* edit the text, #GtkCellRendererSpin offers a #GtkSpinButton widget. Of course,
* that means that the text has to be parseable as a floating point number.
*
* The range of the spinbutton is taken from the adjustment property of the
* cell renderer, which can be set explicitly or mapped to a column in the
* tree model, like all properties of cell renders. #GtkCellRendererSpin
* also has properties for the #GtkCellRendererSpin:climb-rate and the number
* of #GtkCellRendererSpin:digits to display. Other #GtkSpinButton properties
* can be set in a handler for the #GtkCellRenderer::editing-started signal.
*
* The #GtkCellRendererSpin cell renderer was added in GTK+ 2.10.
*/
struct _GtkCellRendererSpinPrivate
{
GtkAdjustment *adjustment;
gdouble climb_rate;
guint digits;
};
static void gtk_cell_renderer_spin_finalize (GObject *object);
static void gtk_cell_renderer_spin_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *spec);
static void gtk_cell_renderer_spin_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *spec);
static GtkCellEditable * gtk_cell_renderer_spin_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
enum {
PROP_0,
PROP_ADJUSTMENT,
PROP_CLIMB_RATE,
PROP_DIGITS
};
#define GTK_CELL_RENDERER_SPIN_PATH "gtk-cell-renderer-spin-path"
G_DEFINE_TYPE (GtkCellRendererSpin, gtk_cell_renderer_spin, GTK_TYPE_CELL_RENDERER_TEXT)
static void
gtk_cell_renderer_spin_class_init (GtkCellRendererSpinClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
object_class->finalize = gtk_cell_renderer_spin_finalize;
object_class->get_property = gtk_cell_renderer_spin_get_property;
object_class->set_property = gtk_cell_renderer_spin_set_property;
cell_class->start_editing = gtk_cell_renderer_spin_start_editing;
/**
* GtkCellRendererSpin:adjustment:
*
* The adjustment that holds the value of the spinbutton.
* This must be non-%NULL for the cell renderer to be editable.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_ADJUSTMENT,
g_param_spec_object ("adjustment",
P_("Adjustment"),
P_("The adjustment that holds the value of the spin button"),
GTK_TYPE_ADJUSTMENT,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererSpin:climb-rate:
*
* The acceleration rate when you hold down a button.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_CLIMB_RATE,
g_param_spec_double ("climb-rate",
P_("Climb rate"),
P_("The acceleration rate when you hold down a button"),
0.0, G_MAXDOUBLE, 0.0,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererSpin:digits:
*
* The number of decimal places to display.
*
* Since: 2.10
*/
g_object_class_install_property (object_class,
PROP_DIGITS,
g_param_spec_uint ("digits",
P_("Digits"),
P_("The number of decimal places to display"),
0, 20, 0,
GTK_PARAM_READWRITE));
g_type_class_add_private (object_class, sizeof (GtkCellRendererSpinPrivate));
}
static void
gtk_cell_renderer_spin_init (GtkCellRendererSpin *self)
{
GtkCellRendererSpinPrivate *priv;
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GTK_TYPE_CELL_RENDERER_SPIN,
GtkCellRendererSpinPrivate);
priv = self->priv;
priv->adjustment = NULL;
priv->climb_rate = 0.0;
priv->digits = 0;
}
static void
gtk_cell_renderer_spin_finalize (GObject *object)
{
GtkCellRendererSpinPrivate *priv;
priv = GTK_CELL_RENDERER_SPIN (object)->priv;
if (priv && priv->adjustment)
g_object_unref (priv->adjustment);
G_OBJECT_CLASS (gtk_cell_renderer_spin_parent_class)->finalize (object);
}
static void
gtk_cell_renderer_spin_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererSpin *renderer;
GtkCellRendererSpinPrivate *priv;
renderer = GTK_CELL_RENDERER_SPIN (object);
priv = renderer->priv;
switch (prop_id)
{
case PROP_ADJUSTMENT:
g_value_set_object (value, priv->adjustment);
break;
case PROP_CLIMB_RATE:
g_value_set_double (value, priv->climb_rate);
break;
case PROP_DIGITS:
g_value_set_uint (value, priv->digits);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_cell_renderer_spin_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRendererSpin *renderer;
GtkCellRendererSpinPrivate *priv;
GObject *obj;
renderer = GTK_CELL_RENDERER_SPIN (object);
priv = renderer->priv;
switch (prop_id)
{
case PROP_ADJUSTMENT:
obj = g_value_get_object (value);
if (priv->adjustment)
{
g_object_unref (priv->adjustment);
priv->adjustment = NULL;
}
if (obj)
priv->adjustment = g_object_ref_sink (obj);
break;
case PROP_CLIMB_RATE:
priv->climb_rate = g_value_get_double (value);
break;
case PROP_DIGITS:
priv->digits = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gtk_cell_renderer_spin_focus_out_event (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
const gchar *path;
const gchar *new_text;
gboolean canceled;
g_object_get (widget,
"editing-canceled", &canceled,
NULL);
g_signal_handlers_disconnect_by_func (widget,
gtk_cell_renderer_spin_focus_out_event,
data);
gtk_cell_renderer_stop_editing (GTK_CELL_RENDERER (data), canceled);
if (!canceled)
{
path = g_object_get_data (G_OBJECT (widget), GTK_CELL_RENDERER_SPIN_PATH);
new_text = gtk_entry_get_text (GTK_ENTRY (widget));
g_signal_emit_by_name (data, "edited", path, new_text);
}
return FALSE;
}
static gboolean
gtk_cell_renderer_spin_key_press_event (GtkWidget *widget,
GdkEventKey *event,
gpointer data)
{
if (event->state == 0)
{
if (event->keyval == GDK_KEY_Up)
{
gtk_spin_button_spin (GTK_SPIN_BUTTON (widget), GTK_SPIN_STEP_FORWARD, 1);
return TRUE;
}
else if (event->keyval == GDK_KEY_Down)
{
gtk_spin_button_spin (GTK_SPIN_BUTTON (widget), GTK_SPIN_STEP_BACKWARD, 1);
return TRUE;
}
}
return FALSE;
}
static gboolean
gtk_cell_renderer_spin_button_press_event (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
/* Block 2BUTTON and 3BUTTON here, so that they won't be eaten
* by tree view.
*/
if (event->type == GDK_2BUTTON_PRESS
|| event->type == GDK_3BUTTON_PRESS)
return TRUE;
return FALSE;
}
static GtkCellEditable *
gtk_cell_renderer_spin_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererSpinPrivate *priv;
GtkCellRendererText *cell_text;
GtkWidget *spin;
gboolean editable;
gchar *text;
cell_text = GTK_CELL_RENDERER_TEXT (cell);
priv = GTK_CELL_RENDERER_SPIN (cell)->priv;
g_object_get (cell_text, "editable", &editable, NULL);
if (!editable)
return NULL;
if (!priv->adjustment)
return NULL;
spin = gtk_spin_button_new (priv->adjustment,
priv->climb_rate, priv->digits);
g_signal_connect (spin, "button-press-event",
G_CALLBACK (gtk_cell_renderer_spin_button_press_event),
NULL);
g_object_get (cell_text, "text", &text, NULL);
if (text)
{
gtk_spin_button_set_value (GTK_SPIN_BUTTON (spin),
g_strtod (text, NULL));
g_free (text);
}
g_object_set_data_full (G_OBJECT (spin), GTK_CELL_RENDERER_SPIN_PATH,
g_strdup (path), g_free);
g_signal_connect (G_OBJECT (spin), "focus-out-event",
G_CALLBACK (gtk_cell_renderer_spin_focus_out_event),
cell);
g_signal_connect (G_OBJECT (spin), "key-press-event",
G_CALLBACK (gtk_cell_renderer_spin_key_press_event),
cell);
gtk_widget_show (spin);
return GTK_CELL_EDITABLE (spin);
}
/**
* gtk_cell_renderer_spin_new:
*
* Creates a new #GtkCellRendererSpin.
*
* Returns: a new #GtkCellRendererSpin
*
* Since: 2.10
*/
GtkCellRenderer *
gtk_cell_renderer_spin_new (void)
{
return g_object_new (GTK_TYPE_CELL_RENDERER_SPIN, NULL);
}
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