364 lines
10 KiB
C
364 lines
10 KiB
C
/*
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* Copyright (C) 2013 - 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-column-combo.h"
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#include "../vn-list-model.h"
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static void vn_column_combo_model_holder_init (DbModelHolderInterface * iface);
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G_DEFINE_TYPE_WITH_CODE (VnColumnCombo, vn_column_combo, VN_TYPE_COLUMN,
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G_IMPLEMENT_INTERFACE (DB_TYPE_MODEL_HOLDER,
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vn_column_combo_model_holder_init)
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);
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VnColumn * vn_column_combo_new ()
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{
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return g_object_new (VN_TYPE_COLUMN_COMBO, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void vn_column_combo_set_value (VnColumnCombo * self, GtkTreeModel * model,
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GtkTreeIter * tree_iter, GObject * cell, 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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{
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DbIter iter;
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if (gvn_value_is_null (value))
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g_object_set_property (cell, "text", value);
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else if (db_model_search_value (self->model, self->index_column, &iter, value))
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g_object_set_property (cell, "text",
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db_model_get_value (self->model, &iter, self->show_column, NULL));
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}
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}
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/*
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* Restores the focus to the tree view after its edition.
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*/
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static void vn_column_combo_restore_focus (VnColumnCombo * self)
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{
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gtk_widget_grab_focus
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(gtk_tree_view_column_get_tree_view (GTK_TREE_VIEW_COLUMN (self)));
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}
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/*
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* Sets the value of the entry to an empty string if a null value is selected.
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*/
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static gchar * vn_column_combo_on_format_entry_text (GtkComboBox * combo,
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gchar * path, VnColumnCombo * self)
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{
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gchar * str;
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GtkTreeIter iter;
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gtk_tree_model_get_iter_from_string (self->tree, &iter, path);
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gtk_tree_model_get (self->tree, &iter, self->show_column, &str, -1);
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return str ? str : g_strdup ("");
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}
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/*
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* Sets the autocompletion functionality to the cell being edited.
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*/
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static void vn_column_combo_on_editing_started (GtkCellRenderer * cell,
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GtkCellEditable * cell_editable, const gchar * path, VnColumnCombo * self)
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{
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GtkEntry * entry;
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if (!GTK_IS_COMBO_BOX (cell_editable) || !self->tree)
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return;
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entry = GTK_ENTRY (gtk_bin_get_child (GTK_BIN (cell_editable)));
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// Each edition uses a new cell_editable.
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if (self->cell_editable)
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{
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g_signal_handlers_disconnect_by_func (self->cell_editable,
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vn_column_combo_on_format_entry_text, self);
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g_object_unref (self->cell_editable);
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}
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if (!self->completion_ready)
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{
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gtk_entry_completion_set_model (self->completion, self->tree);
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gtk_entry_completion_set_text_column (self->completion, self->show_column);
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gtk_entry_completion_set_minimum_key_length (self->completion, 1);
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self->completion_ready = TRUE;
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g_signal_connect_swapped (cell_editable, "editing-done",
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G_CALLBACK (vn_column_combo_restore_focus), self);
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self->cell_editable = g_object_ref (cell_editable);
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}
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gtk_entry_set_completion (entry, self->completion);
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g_signal_connect (cell_editable, "format-entry-text",
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G_CALLBACK (vn_column_combo_on_format_entry_text), self);
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self->cell_editable = g_object_ref (cell_editable);
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}
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/*
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* When the text is edited using an entry, tries to set its underlying value.
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*/
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static void vn_column_combo_on_edited (GtkCellRendererText * renderer,
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gchar * path, gchar * new_text, VnColumnCombo * self)
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{
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DbIter iter;
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GValue value = G_VALUE_INIT;
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if (!g_strcmp0 (new_text, ""))
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{
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g_value_init (&value, GVN_TYPE_NULL);
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VN_COLUMN_GET_CLASS (self)->value_changed (VN_COLUMN (self), path, &value);
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}
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else
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{
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gvn_value_new_with_content (&value, G_TYPE_STRING, new_text);
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if (db_model_search_value (self->model, self->show_column, &iter, &value))
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{
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const GValue * val;
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if ((val = db_model_get_value (self->model, &iter, self->index_column, NULL)))
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VN_COLUMN_GET_CLASS (self)->value_changed (VN_COLUMN (self), path, val);
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}
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}
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g_value_unset (&value);
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vn_column_combo_restore_focus (self);
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}
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static void vn_column_combo_set_editable (VnColumnCombo * self, gboolean editable)
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{
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VnColumn * parent = VN_COLUMN (self);
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if (editable)
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{
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g_signal_connect (parent->cell, "editing-started",
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G_CALLBACK (vn_column_combo_on_editing_started), self);
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g_signal_connect (parent->cell, "edited",
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G_CALLBACK (vn_column_combo_on_edited), self);
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g_signal_connect_swapped (parent->cell, "editing-canceled",
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G_CALLBACK (vn_column_combo_restore_focus), self);
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if (!self->completion)
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self->completion = gtk_entry_completion_new ();
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}
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else
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{
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g_signal_handlers_disconnect_by_data (parent->cell, self);
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if (self->cell_editable)
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g_signal_handlers_disconnect_by_data (self->cell_editable, self);
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if (self->completion)
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g_clear_object (&self->completion);
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self->completion_ready = FALSE;
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self->cell_editable = NULL;
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}
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g_object_set (parent->cell, "editable", editable, NULL);
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}
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static void vn_column_combo_set_null (VnColumnCombo * self, gboolean null)
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{
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if (vn_column_get_model (VN_COLUMN (self)) && self->model)
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vn_list_model_use_null_row (VN_LIST_MODEL (self->tree), null);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++ DbModelHolder implementation
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static void vn_column_combo_model_changed (VnColumnCombo * self)
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{
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if (self->model)
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{
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vn_list_model_use_null_row (VN_LIST_MODEL (self->tree), VN_COLUMN (self)->null);
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if (self->sort_column >= 0)
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gtk_tree_view_column_set_sort_column_id (
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GTK_TREE_VIEW_COLUMN (self), self->sort_column);
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}
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}
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static void vn_column_combo_on_status_changed (DbModel * model,
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DbModelStatus status, VnColumnCombo * self)
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{
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if (status == DB_MODEL_STATUS_READY)
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{
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g_object_set (VN_COLUMN (self)->cell, "model", self->tree, NULL);
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vn_list_model_use_null_row (VN_LIST_MODEL (self->tree), VN_COLUMN (self)->null);
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}
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else
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g_object_set (VN_COLUMN (self)->cell, "model", NULL, NULL);
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}
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static void vn_column_combo_set_model (VnColumnCombo * self, DbModel * model)
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{
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g_return_if_fail (!model || DB_IS_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_column_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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if (self->completion_ready)
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gtk_entry_completion_set_model (self->completion, NULL);
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}
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if (model)
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{
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self->model = g_object_ref (model);
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self->tree = GTK_TREE_MODEL (vn_list_model_new (model));
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g_signal_connect (model, "status-changed",
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G_CALLBACK (vn_column_combo_on_status_changed), self);
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if (self->completion_ready)
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gtk_entry_completion_set_model (self->completion, self->tree);
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}
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}
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static DbModel * vn_column_combo_get_model (VnColumnCombo * self)
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{
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return self->model;
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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_SORT_COLUMN
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,PROP_MODEL
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};
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static void vn_column_combo_set_property (VnColumnCombo * self, guint id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (id)
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{
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case PROP_INDEX_COLUMN:
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self->index_column = g_value_get_uint (value);
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break;
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case PROP_SHOW_COLUMN:
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self->show_column = g_value_get_uint (value);
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g_object_set (VN_COLUMN (self)->cell, "text-column", self->show_column,
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NULL);
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break;
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case PROP_SORT_COLUMN:
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self->sort_column = g_value_get_int (value);
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break;
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case PROP_MODEL:
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vn_column_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, id, pspec);
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}
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}
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static void vn_column_combo_get_property (VnColumnCombo * self, guint id,
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GValue * value, GParamSpec * pspec)
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{
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switch (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_SORT_COLUMN:
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g_value_set_int (value, self->sort_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, id, pspec);
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}
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Class
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static void vn_column_combo_init (VnColumnCombo * self)
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{
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GtkCellRenderer * cell = gtk_cell_renderer_combo_new ();
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self->model = NULL;
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self->tree = NULL;
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self->completion = NULL;
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self->completion_ready = FALSE;
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self->cell_editable = NULL;
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VN_COLUMN_GET_CLASS (self)->set_renderer (VN_COLUMN (self), cell);
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}
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static void vn_column_combo_finalize (VnColumnCombo * self)
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{
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vn_column_combo_set_model (self, NULL);
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if (self->completion)
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g_object_unref (self->completion);
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G_OBJECT_CLASS (vn_column_combo_parent_class)->finalize (G_OBJECT (self));
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}
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static void vn_column_combo_class_init (VnColumnComboClass * klass)
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{
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GObjectClass * k = G_OBJECT_CLASS (klass);
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k->finalize = (GObjectFinalizeFunc) vn_column_combo_finalize;
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k->set_property = (GObjectSetPropertyFunc) vn_column_combo_set_property;
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k->get_property = (GObjectGetPropertyFunc) vn_column_combo_get_property;
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VN_COLUMN_CLASS (klass)->set_value = (VnColumnSetValueFunc) vn_column_combo_set_value;
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VN_COLUMN_CLASS (klass)->set_editable = (VnColumnSetEditableFunc) vn_column_combo_set_editable;
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VN_COLUMN_CLASS (klass)->set_null = (VnColumnSetNullFunc) vn_column_combo_set_null;
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VN_COLUMN_CLASS (klass)->model_changed = (VnColumnModelChangedFunc) vn_column_combo_model_changed;
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g_object_class_override_property (k, PROP_MODEL, "data-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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g_object_class_install_property (k, PROP_SORT_COLUMN,
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g_param_spec_int ("sort-column"
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,_("Sort column")
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,_("The field number of the Grid model used to sort the column")
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,-1, 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_column_combo_model_holder_init (DbModelHolderInterface * iface)
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{
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iface->get_model = (DbModelHolderGetModelFunc) vn_column_combo_get_model;
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iface->set_model = (DbModelHolderSetModelFunc) vn_column_combo_set_model;
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}
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