PIKApp/libpikawidgets/pikaunitcombobox.c

231 lines
6.2 KiB
C
Raw Permalink Normal View History

2023-09-26 00:35:21 +02:00
/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1999 Peter Mattis and Spencer Kimball
*
* pikaunitcombobox.c
* Copyright (C) 2004, 2008 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 "pikawidgetstypes.h"
#include "pikaunitcombobox.h"
#include "pikaunitstore.h"
/**
* SECTION: pikaunitcombobox
* @title: PikaUnitComboBox
* @short_description: A #GtkComboBox to select a #PikaUnit.
* @see_also: #PikaUnit, #PikaUnitStore
*
* #PikaUnitComboBox selects units stored in a #PikaUnitStore.
**/
static void pika_unit_combo_box_popup_shown (PikaUnitComboBox *widget);
static void pika_unit_combo_box_constructed (GObject *object);
G_DEFINE_TYPE (PikaUnitComboBox, pika_unit_combo_box, GTK_TYPE_COMBO_BOX)
#define parent_class pika_unit_combo_box_parent_class
static void
pika_unit_combo_box_class_init (PikaUnitComboBoxClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = pika_unit_combo_box_constructed;
}
static void
pika_unit_combo_box_init (PikaUnitComboBox *combo)
{
g_signal_connect (combo, "notify::popup-shown",
G_CALLBACK (pika_unit_combo_box_popup_shown),
NULL);
}
static void
pika_unit_combo_box_constructed (GObject *object)
{
PikaUnitComboBox *combo = PIKA_UNIT_COMBO_BOX (object);
G_OBJECT_CLASS (parent_class)->constructed (object);
pika_unit_combo_box_popup_shown (combo);
}
static void
pika_unit_combo_box_popup_shown (PikaUnitComboBox *widget)
{
PikaUnitStore *store;
gboolean shown;
GtkCellRenderer *cell;
g_object_get (widget,
"model", &store,
"popup-shown", &shown,
NULL);
if (store)
{
if (shown)
_pika_unit_store_sync_units (store);
g_object_unref (store);
}
gtk_cell_layout_clear (GTK_CELL_LAYOUT (widget));
cell = gtk_cell_renderer_text_new ();
if (shown)
{
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (widget), cell, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (widget), cell,
"text", PIKA_UNIT_STORE_UNIT_LONG_FORMAT,
NULL);
/* XXX This is ugly but it seems that GtkComboBox won't resize its popup
* menu when the contents changes (it only resizes the main "chosen item"
* area). We force a redraw by popping down then up after a contents
* change.
*/
g_signal_handlers_disconnect_by_func (widget,
G_CALLBACK (pika_unit_combo_box_popup_shown),
NULL);
gtk_combo_box_popdown (GTK_COMBO_BOX (widget));
gtk_combo_box_popup (GTK_COMBO_BOX (widget));
g_signal_connect (widget, "notify::popup-shown",
G_CALLBACK (pika_unit_combo_box_popup_shown),
NULL);
}
else
{
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (widget), cell, FALSE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (widget), cell,
"text", PIKA_UNIT_STORE_UNIT_SHORT_FORMAT,
NULL);
}
}
/**
* pika_unit_combo_box_new:
*
* Returns: a new #PikaUnitComboBox.
**/
GtkWidget *
pika_unit_combo_box_new (void)
{
GtkWidget *combo_box;
PikaUnitStore *store;
store = pika_unit_store_new (0);
combo_box = g_object_new (PIKA_TYPE_UNIT_COMBO_BOX,
"model", store,
"id-column", PIKA_UNIT_STORE_UNIT_LONG_FORMAT,
NULL);
g_object_unref (store);
return combo_box;
}
/**
* pika_unit_combo_box_new_with_model:
* @model: a #PikaUnitStore
*
* Returns: a new #PikaUnitComboBox.
**/
GtkWidget *
pika_unit_combo_box_new_with_model (PikaUnitStore *model)
{
return g_object_new (PIKA_TYPE_UNIT_COMBO_BOX,
"model", model,
"id-column", PIKA_UNIT_STORE_UNIT_LONG_FORMAT,
NULL);
}
/**
* pika_unit_combo_box_get_active:
* @combo: a #PikaUnitComboBox
*
* Returns the #PikaUnit currently selected in the combo box.
*
* Returns: (transfer none): The selected #PikaUnit.
**/
PikaUnit
pika_unit_combo_box_get_active (PikaUnitComboBox *combo)
{
GtkTreeIter iter;
gint unit;
g_return_val_if_fail (PIKA_IS_UNIT_COMBO_BOX (combo), -1);
gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo), &iter);
gtk_tree_model_get (gtk_combo_box_get_model (GTK_COMBO_BOX (combo)), &iter,
PIKA_UNIT_STORE_UNIT, &unit,
-1);
return (PikaUnit) unit;
}
/**
* pika_unit_combo_box_set_active:
* @combo: a #PikaUnitComboBox
* @unit: a #PikaUnit
*
* Sets @unit as the currently selected #PikaUnit on @combo.
**/
void
pika_unit_combo_box_set_active (PikaUnitComboBox *combo,
PikaUnit unit)
{
GtkTreeModel *model;
GtkTreeIter iter;
gboolean iter_valid;
g_return_if_fail (PIKA_IS_UNIT_COMBO_BOX (combo));
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo));
_pika_unit_store_sync_units (PIKA_UNIT_STORE (model));
for (iter_valid = gtk_tree_model_get_iter_first (model, &iter);
iter_valid;
iter_valid = gtk_tree_model_iter_next (model, &iter))
{
gint iter_unit;
gtk_tree_model_get (model, &iter,
PIKA_UNIT_STORE_UNIT, &iter_unit,
-1);
if (unit == (PikaUnit) iter_unit)
{
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo), &iter);
break;
}
}
}