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gtk3/gtk/gtkcellrenderercombo.c

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/* GtkCellRendererCombo
* 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.
*/
#include "config.h"
#include <string.h>
#include "gtkintl.h"
#include "gtkbin.h"
#include "gtkentry.h"
#include "gtkcelllayout.h"
#include "gtkcellrenderercombo.h"
#include "gtkcellrenderertext.h"
#include "gtkcombobox.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
/**
* SECTION:gtkcellrenderercombo
* @Short_description: Renders a combobox in a cell
* @Title: GtkCellRendererCombo
*
* #GtkCellRendererCombo renders text in a cell like #GtkCellRendererText from
* which it is derived. But while #GtkCellRendererText offers a simple entry to
* edit the text, #GtkCellRendererCombo offers a #GtkComboBox or #GtkComboBoxEntry
* widget to edit the text. The values to display in the combo box are taken from
* the tree model specified in the #GtkCellRendererCombo:model property.
*
* The combo cell renderer takes care of adding a text cell renderer to the combo
* box and sets it to display the column specified by its
* #GtkCellRendererCombo:text-column property. Further properties of the comnbo box
* can be set in a handler for the #GtkCellRenderer::editing-started signal.
*
* The #GtkCellRendererCombo cell renderer was added in GTK+ 2.6.
*/
struct _GtkCellRendererComboPrivate
{
GtkTreeModel *model;
GtkWidget *combo;
gboolean has_entry;
gint text_column;
gulong focus_out_id;
};
static void gtk_cell_renderer_combo_class_init (GtkCellRendererComboClass *klass);
static void gtk_cell_renderer_combo_init (GtkCellRendererCombo *self);
static void gtk_cell_renderer_combo_finalize (GObject *object);
static void gtk_cell_renderer_combo_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_combo_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static GtkCellEditable *gtk_cell_renderer_combo_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_MODEL,
PROP_TEXT_COLUMN,
PROP_HAS_ENTRY
};
enum {
CHANGED,
LAST_SIGNAL
};
static guint cell_renderer_combo_signals[LAST_SIGNAL] = { 0, };
#define GTK_CELL_RENDERER_COMBO_PATH "gtk-cell-renderer-combo-path"
G_DEFINE_TYPE (GtkCellRendererCombo, gtk_cell_renderer_combo, GTK_TYPE_CELL_RENDERER_TEXT)
static void
gtk_cell_renderer_combo_class_init (GtkCellRendererComboClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
object_class->finalize = gtk_cell_renderer_combo_finalize;
object_class->get_property = gtk_cell_renderer_combo_get_property;
object_class->set_property = gtk_cell_renderer_combo_set_property;
cell_class->start_editing = gtk_cell_renderer_combo_start_editing;
/**
* GtkCellRendererCombo:model:
*
* Holds a tree model containing the possible values for the combo box.
* Use the text_column property to specify the column holding the values.
*
* Since: 2.6
*/
g_object_class_install_property (object_class,
PROP_MODEL,
g_param_spec_object ("model",
P_("Model"),
P_("The model containing the possible values for the combo box"),
GTK_TYPE_TREE_MODEL,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererCombo:text-column:
*
* Specifies the model column which holds the possible values for the
* combo box.
*
* Note that this refers to the model specified in the model property,
* <emphasis>not</emphasis> the model backing the tree view to which
* this cell renderer is attached.
*
* #GtkCellRendererCombo automatically adds a text cell renderer for
* this column to its combo box.
*
* Since: 2.6
*/
g_object_class_install_property (object_class,
PROP_TEXT_COLUMN,
g_param_spec_int ("text-column",
P_("Text Column"),
P_("A column in the data source model to get the strings from"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererCombo:has-entry:
*
* If %TRUE, the cell renderer will include an entry and allow to enter
* values other than the ones in the popup list.
*
* Since: 2.6
*/
g_object_class_install_property (object_class,
PROP_HAS_ENTRY,
g_param_spec_boolean ("has-entry",
P_("Has Entry"),
P_("If FALSE, don't allow to enter strings other than the chosen ones"),
TRUE,
GTK_PARAM_READWRITE));
/**
* GtkCellRendererCombo::changed:
* @combo: the object on which the signal is emitted
* @path_string: a string of the path identifying the edited cell
* (relative to the tree view model)
* @new_iter: the new iter selected in the combo box
* (relative to the combo box model)
*
* This signal is emitted each time after the user selected an item in
* the combo box, either by using the mouse or the arrow keys. Contrary
* to GtkComboBox, GtkCellRendererCombo::changed is not emitted for
* changes made to a selected item in the entry. The argument @new_iter
* corresponds to the newly selected item in the combo box and it is relative
* to the GtkTreeModel set via the model property on GtkCellRendererCombo.
*
* Note that as soon as you change the model displayed in the tree view,
* the tree view will immediately cease the editing operating. This
* means that you most probably want to refrain from changing the model
* until the combo cell renderer emits the edited or editing_canceled signal.
*
* Since: 2.14
*/
cell_renderer_combo_signals[CHANGED] =
g_signal_new (I_("changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
_gtk_marshal_VOID__STRING_BOXED,
G_TYPE_NONE, 2,
G_TYPE_STRING,
GTK_TYPE_TREE_ITER);
g_type_class_add_private (klass, sizeof (GtkCellRendererComboPrivate));
}
static void
gtk_cell_renderer_combo_init (GtkCellRendererCombo *self)
{
GtkCellRendererComboPrivate *priv;
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GTK_TYPE_CELL_RENDERER_COMBO,
GtkCellRendererComboPrivate);
priv = self->priv;
priv->model = NULL;
priv->text_column = -1;
priv->has_entry = TRUE;
priv->focus_out_id = 0;
}
/**
* gtk_cell_renderer_combo_new:
*
* Creates a new #GtkCellRendererCombo.
* Adjust how text is drawn 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 "text" property
* on the cell renderer to a string value in the model, thus rendering
* a different string in each row of the #GtkTreeView.
*
* Returns: the new cell renderer
*
* Since: 2.6
*/
GtkCellRenderer *
gtk_cell_renderer_combo_new (void)
{
return g_object_new (GTK_TYPE_CELL_RENDERER_COMBO, NULL);
}
static void
gtk_cell_renderer_combo_finalize (GObject *object)
{
GtkCellRendererCombo *cell = GTK_CELL_RENDERER_COMBO (object);
GtkCellRendererComboPrivate *priv = cell->priv;
if (priv->model)
{
g_object_unref (priv->model);
priv->model = NULL;
}
G_OBJECT_CLASS (gtk_cell_renderer_combo_parent_class)->finalize (object);
}
static void
gtk_cell_renderer_combo_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererCombo *cell = GTK_CELL_RENDERER_COMBO (object);
GtkCellRendererComboPrivate *priv = cell->priv;
switch (prop_id)
{
case PROP_MODEL:
g_value_set_object (value, priv->model);
break;
case PROP_TEXT_COLUMN:
g_value_set_int (value, priv->text_column);
break;
case PROP_HAS_ENTRY:
g_value_set_boolean (value, priv->has_entry);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_cell_renderer_combo_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRendererCombo *cell = GTK_CELL_RENDERER_COMBO (object);
GtkCellRendererComboPrivate *priv = cell->priv;
switch (prop_id)
{
case PROP_MODEL:
{
if (priv->model)
g_object_unref (priv->model);
priv->model = GTK_TREE_MODEL (g_value_get_object (value));
if (priv->model)
g_object_ref (priv->model);
break;
}
case PROP_TEXT_COLUMN:
priv->text_column = g_value_get_int (value);
break;
case PROP_HAS_ENTRY:
priv->has_entry = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_cell_renderer_combo_changed (GtkComboBox *combo,
gpointer data)
{
GtkTreeIter iter;
GtkCellRendererCombo *cell;
cell = GTK_CELL_RENDERER_COMBO (data);
if (gtk_combo_box_get_active_iter (combo, &iter))
{
const char *path;
path = g_object_get_data (G_OBJECT (combo), GTK_CELL_RENDERER_COMBO_PATH);
g_signal_emit (cell, cell_renderer_combo_signals[CHANGED], 0,
path, &iter);
}
}
static void
gtk_cell_renderer_combo_editing_done (GtkCellEditable *combo,
gpointer data)
{
const gchar *path;
gchar *new_text = NULL;
GtkTreeModel *model;
GtkTreeIter iter;
GtkCellRendererCombo *cell;
GtkEntry *entry;
gboolean canceled;
GtkCellRendererComboPrivate *priv;
cell = GTK_CELL_RENDERER_COMBO (data);
priv = cell->priv;
if (priv->focus_out_id > 0)
{
g_signal_handler_disconnect (combo, priv->focus_out_id);
priv->focus_out_id = 0;
}
g_object_get (combo,
"editing-canceled", &canceled,
NULL);
gtk_cell_renderer_stop_editing (GTK_CELL_RENDERER (data), canceled);
if (canceled)
{
priv->combo = NULL;
return;
}
if (gtk_combo_box_get_has_entry (GTK_COMBO_BOX (combo)))
{
entry = GTK_ENTRY (gtk_bin_get_child (GTK_BIN (combo)));
new_text = g_strdup (gtk_entry_get_text (entry));
}
else
{
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo));
if (model
&& gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo), &iter))
gtk_tree_model_get (model, &iter, priv->text_column, &new_text, -1);
}
path = g_object_get_data (G_OBJECT (combo), GTK_CELL_RENDERER_COMBO_PATH);
g_signal_emit_by_name (cell, "edited", path, new_text);
priv->combo = NULL;
g_free (new_text);
}
static gboolean
gtk_cell_renderer_combo_focus_out_event (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
gtk_cell_renderer_combo_editing_done (GTK_CELL_EDITABLE (widget), data);
return FALSE;
}
typedef struct
{
GtkCellRendererCombo *cell;
gboolean found;
GtkTreeIter iter;
} SearchData;
static gboolean
find_text (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer data)
{
GtkCellRendererComboPrivate *priv;
SearchData *search_data = (SearchData *)data;
gchar *text, *cell_text;
priv = search_data->cell->priv;
gtk_tree_model_get (model, iter, priv->text_column, &text, -1);
g_object_get (GTK_CELL_RENDERER_TEXT (search_data->cell),
"text", &cell_text,
NULL);
if (text && cell_text && g_strcmp0 (text, cell_text) == 0)
{
search_data->iter = *iter;
search_data->found = TRUE;
}
g_free (cell_text);
g_free (text);
return search_data->found;
}
static GtkCellEditable *
gtk_cell_renderer_combo_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererCombo *cell_combo;
GtkCellRendererText *cell_text;
GtkWidget *combo;
SearchData search_data;
GtkCellRendererComboPrivate *priv;
gboolean editable;
gchar *text;
cell_text = GTK_CELL_RENDERER_TEXT (cell);
g_object_get (cell_text, "editable", &editable, NULL);
if (editable == FALSE)
return NULL;
cell_combo = GTK_CELL_RENDERER_COMBO (cell);
priv = cell_combo->priv;
if (priv->text_column < 0)
return NULL;
if (priv->has_entry)
{
combo = g_object_new (GTK_TYPE_COMBO_BOX, "has-entry", TRUE, NULL);
if (priv->model)
gtk_combo_box_set_model (GTK_COMBO_BOX (combo), priv->model);
gtk_combo_box_set_entry_text_column (GTK_COMBO_BOX (combo),
priv->text_column);
g_object_get (cell_text, "text", &text, NULL);
if (text)
gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (combo))),
text);
g_free (text);
}
else
{
cell = gtk_cell_renderer_text_new ();
combo = gtk_combo_box_new ();
if (priv->model)
gtk_combo_box_set_model (GTK_COMBO_BOX (combo), priv->model);
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), cell, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo),
cell, "text", priv->text_column,
NULL);
/* determine the current value */
if (priv->model)
{
search_data.cell = cell_combo;
search_data.found = FALSE;
gtk_tree_model_foreach (priv->model, find_text, &search_data);
if (search_data.found)
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo),
&(search_data.iter));
}
}
g_object_set (combo, "has-frame", FALSE, NULL);
g_object_set_data_full (G_OBJECT (combo),
I_(GTK_CELL_RENDERER_COMBO_PATH),
g_strdup (path), g_free);
gtk_widget_show (combo);
g_signal_connect (GTK_CELL_EDITABLE (combo), "editing-done",
G_CALLBACK (gtk_cell_renderer_combo_editing_done),
cell_combo);
g_signal_connect (GTK_CELL_EDITABLE (combo), "changed",
G_CALLBACK (gtk_cell_renderer_combo_changed),
cell_combo);
priv->focus_out_id = g_signal_connect (combo, "focus-out-event",
G_CALLBACK (gtk_cell_renderer_combo_focus_out_event),
cell_combo);
priv->combo = combo;
return GTK_CELL_EDITABLE (combo);
}
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