306 lines
7.9 KiB
C
306 lines
7.9 KiB
C
/*
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* Copyright (C) 2012 - Juan Ferrer Toribio
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "vn-combo.h"
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#include "../vn-grid-model.h"
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#include <db/db.h>
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/**
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* SECTION:vn-combo
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* @Short_description: a combo box widget
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* @Title: VnCombo
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* @See_also: #VnField
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* @Image: combo.png
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*
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* A combo box widget to select from a list of items, selected from a
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* database.
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*/
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static void vn_combo_model_holder_interface_init (DbModelHolderInterface * iface);
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G_DEFINE_TYPE_WITH_CODE (VnCombo, vn_combo, VN_TYPE_FIELD,
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G_IMPLEMENT_INTERFACE (DB_TYPE_MODEL_HOLDER,
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vn_combo_model_holder_interface_init)
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);
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/**
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* vn_combo_new:
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* @model: the model used by combo box
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*
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* Creates a new #VnCombo
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*
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* Return value: a #VnCombo
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**/
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VnField * vn_combo_new (DbModel * model)
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{
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return g_object_new (VN_TYPE_COMBO, "model", model, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void vn_combo_on_changed (GtkComboBox * combo, VnCombo * self)
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{
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GtkTreeIter iter;
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GValue value = G_VALUE_INIT;
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if (gtk_combo_box_get_active_iter (combo, &iter))
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gtk_tree_model_get_value (self->tree, &iter, self->index_column, &value);
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else
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g_value_init (&value, GVN_TYPE_NULL);
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VN_FIELD_GET_CLASS (self)->value_changed (VN_FIELD (self), &value);
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g_value_unset (&value);
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}
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static void vn_combo_on_model_ready (VnCombo * self, const GValue * value)
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{
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DbIter iter;
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g_signal_handlers_block_by_func (self->combo,
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vn_combo_on_changed, self);
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if (!gvn_value_is_null (value)
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&& db_model_search_value (self->model, self->index_column, &iter, value))
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{
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GtkTreeIter tree_iter;
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vn_gtk_tree_iter_from_db_iter (&tree_iter, &iter);
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gtk_combo_box_set_active_iter (self->combo, &tree_iter);
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}
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else
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gtk_combo_box_set_active_iter (self->combo, NULL);
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g_signal_handlers_unblock_by_func (self->combo,
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vn_combo_on_changed, self);
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}
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static void vn_combo_set_value (VnCombo * self, const GValue * value)
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{
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if (self->model && db_model_get_status (self->model) == DB_MODEL_STATUS_READY)
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vn_combo_on_model_ready (self, value);
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}
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static void vn_combo_on_status_changed (DbModel * model, DbModelStatus status, VnCombo * self)
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{
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if (status == DB_MODEL_STATUS_READY)
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{
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gtk_combo_box_set_model (self->combo, self->tree);
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vn_combo_on_model_ready (self, gvn_param_get_value (GVN_PARAM (self)));
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db_model_use_null_row (model, vn_field_get_null (VN_FIELD (self)));
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}
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else
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gtk_combo_box_set_model (self->combo, NULL);
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}
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static DbModel * vn_combo_get_model (VnCombo * self)
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{
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return self->model;
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}
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static void vn_combo_set_model (VnCombo * self, DbModel * model)
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{
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g_return_if_fail (VN_IS_COMBO (self));
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g_return_if_fail (DB_IS_MODEL (model) || !model);
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if (self->model)
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{
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g_signal_handlers_disconnect_by_func (self->model,
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vn_combo_on_status_changed, self);
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g_clear_object (&self->model);
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g_clear_object (&self->tree);
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}
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if (model)
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{
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self->tree = GTK_TREE_MODEL (vn_grid_model_new (model));
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self->model = g_object_ref (model);
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g_signal_connect (model, "status-changed",
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G_CALLBACK (vn_combo_on_status_changed), self);
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vn_combo_on_status_changed (model,
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db_model_get_status (model), self);
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}
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Public
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/**
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* vn_combo_get_index_column:
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* @self: a #VnCombo
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*
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* Gets the combo column index.
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*
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* Return value: the column
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**/
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guint vn_combo_get_index_column (VnCombo * self)
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{
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g_return_val_if_fail (VN_IS_COMBO (self), 0);
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return self->index_column;
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}
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/**
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* vn_combo_set_index_column:
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* @self: a #VnCombo
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* @column: the column
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*
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* Sets the column index used by combo.
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**/
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void vn_combo_set_index_column (VnCombo * self, guint column)
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{
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g_return_if_fail (VN_IS_COMBO (self));
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self->index_column = column;
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vn_combo_set_value (self, gvn_param_get_value (GVN_PARAM (self)));
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}
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/**
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* vn_combo_get_show_column:
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* @self: a #VnCombo
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*
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* Gets the column shown by combo.
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*
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* Return value: the column
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**/
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guint vn_combo_get_show_column (VnCombo * self)
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{
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g_return_val_if_fail (VN_IS_COMBO (self), 0);
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return self->show_column;
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}
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/**
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* vn_combo_set_show_column:
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* @self: a #VnCombo
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* @column: the column
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*
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* Sets the column shown by combo.
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**/
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void vn_combo_set_show_column (VnCombo * self, guint column)
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{
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g_return_if_fail (VN_IS_COMBO (self));
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self->show_column = column;
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gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (self->combo), self->cell);
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gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (self->combo),
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self->cell, "text", (gint) self->show_column);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties
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enum
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{
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PROP_INDEX_COLUMN = 1
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,PROP_SHOW_COLUMN
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,PROP_MODEL
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};
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static void vn_combo_set_property (VnCombo * self, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (property_id)
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{
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case PROP_INDEX_COLUMN:
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vn_combo_set_index_column (self, g_value_get_uint (value));
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break;
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case PROP_SHOW_COLUMN:
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vn_combo_set_show_column (self, g_value_get_uint (value));
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break;
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case PROP_MODEL:
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vn_combo_set_model (self, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec);
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}
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}
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static void vn_combo_get_property (VnCombo * self, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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switch (property_id)
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{
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case PROP_INDEX_COLUMN:
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g_value_set_uint (value, self->index_column);
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break;
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case PROP_SHOW_COLUMN:
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g_value_set_uint (value, self->show_column);
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break;
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case PROP_MODEL:
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g_value_set_object (value, self->model);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec);
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}
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Class
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static void vn_combo_init (VnCombo * self)
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{
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self->tree = NULL;
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self->model = NULL;
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self->combo = GTK_COMBO_BOX (gtk_combo_box_new ());
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g_signal_connect (self->combo, "changed",
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G_CALLBACK (vn_combo_on_changed), self);
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gtk_container_add (GTK_CONTAINER (self), GTK_WIDGET (self->combo));
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self->cell = gtk_cell_renderer_text_new ();
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gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (self->combo), self->cell, TRUE);
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VN_FIELD_GET_CLASS (self)->set_widget (VN_FIELD (self),
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GTK_WIDGET (self->combo));
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}
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static void vn_combo_finalize (VnCombo * self)
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{
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vn_combo_set_model (self, NULL);
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G_OBJECT_CLASS (vn_combo_parent_class)->finalize (G_OBJECT (self));
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}
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static void vn_combo_class_init (VnComboClass * klass)
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{
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GObjectClass * k = G_OBJECT_CLASS (klass);
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k->finalize = (GObjectFinalizeFunc) vn_combo_finalize;
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k->set_property = (GObjectSetPropertyFunc) vn_combo_set_property;
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k->get_property = (GObjectGetPropertyFunc) vn_combo_get_property;
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VN_FIELD_CLASS (klass)->set_value = (VnFieldSetValueFunc) vn_combo_set_value;
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g_object_class_override_property (k, PROP_MODEL, "model");
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g_object_class_install_property (k, PROP_INDEX_COLUMN,
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g_param_spec_uint ("index-column"
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,_("Index column")
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,_("The column index of the model")
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,0, 255, 0
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,G_PARAM_CONSTRUCT | G_PARAM_READWRITE
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));
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g_object_class_install_property (k, PROP_SHOW_COLUMN,
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g_param_spec_uint ("show-column"
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,_("Show column")
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,_("The column of the model shown by combo")
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,0, 255, 1
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,G_PARAM_CONSTRUCT | G_PARAM_READWRITE
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));
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}
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static void vn_combo_model_holder_interface_init (DbModelHolderInterface * iface)
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{
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iface->get_model = (DbModelHolderGetModelFunc) vn_combo_get_model;
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iface->set_model = (DbModelHolderSetModelFunc) vn_combo_set_model;
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}
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