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/*
Copyright (C) 2010 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iostream>
#include "gtkmm2ext/treeutils.h"
using namespace Glib;
using namespace Gtk;
void
Gtkmm2ext::treeview_select_one (RefPtr<TreeSelection> selection, RefPtr<TreeModel> /*model*/, TreeView& view,
TreeIter /*iter*/, TreePath path, TreeViewColumn* col)
{
if (!view.row_expanded (path)) {
// cerr << "!! selecting a row that isn't expanded! " << path.to_string() << endl;
}
selection->unselect_all ();
view.set_cursor (path, *col, true);
}
void
Gtkmm2ext::treeview_select_previous (TreeView& view, RefPtr<TreeModel> model, TreeViewColumn* col)
{
RefPtr<TreeSelection> selection = view.get_selection();
TreeView::Selection::ListHandle_Path rows = selection->get_selected_rows ();
if (selection->count_selected_rows() == 0 || !col || model->children().size() < 2) {
return;
}
TreeView::Selection::ListHandle_Path::iterator i = rows.begin();
TreeModel::Path start = *i;
TreePath prev = start;
TreeIter iter;
iter = model->get_iter (prev);
if (iter == model->children().begin()) {
/* at the start, go to the end */
TreeIter x = iter;
while (iter != model->children().end()) {
x = iter;
iter++;
}
/* "x" is now an iterator for the last row */
iter = x;
prev = model->get_path (iter);
} else {
prev.prev();
}
if (prev == start) {
/* can't go back, go up */
if (!prev.empty()) {
prev.up ();
}
}
iter = model->get_iter (prev);
if (iter) {
treeview_select_one (selection, model, view, iter, prev, col);
} else {
/* can't move to previous, so restart at selected and move up the tree */
prev = start;
prev.up ();
if (!prev.empty()) {
iter = model->get_iter (prev);
if (!iter) {
/* can't move up the tree*/
return;
} else {
/* moved up from child to parent, now move to ??? */
prev.prev();
}
iter = model->get_iter (prev);
}
if (iter) {
treeview_select_one (selection, model, view, iter, prev, col);
} else {
/* we could not forward, so wrap around to the first row */
/* grr: no nice way to get an iter for the
last row, because there is no operator--
for TreeIter
*/
TreeIter x = model->children().begin();
TreeIter px = x;
while (x != model->children().end()) {
px = x;
x++;
}
prev = model->get_path (px);
treeview_select_one (selection, model, view, px, prev, col);
}
}
}
void
Gtkmm2ext::treeview_select_next (TreeView& view, RefPtr<TreeModel> model, TreeViewColumn* col)
{
RefPtr<TreeSelection> selection = view.get_selection();
TreeView::Selection::ListHandle_Path rows = selection->get_selected_rows ();
if (selection->count_selected_rows() == 0 || !col || model->children().size() < 2) {
return;
}
/* start with the last selected row, not the first */
TreeView::Selection::ListHandle_Path::iterator i = rows.begin();
TreeView::Selection::ListHandle_Path::iterator p = i;
/* get the last selected row */
while (i != rows.end()) {
p = i;
++i;
}
TreeModel::Path start = *p;
TreePath next = start;
TreeIter iter;
/* if the row we intend to start from has children but it is not expanded,
do not try to go down.
*/
iter = model->get_iter (start);
TreeRow row = (*iter);
bool down_allowed = false;
if (!row.children().empty()) {
TreePath tp = model->get_path (iter);
if (!view.row_expanded (tp)) {
down_allowed = false;
} else {
down_allowed = true;
}
}
start = next;
if (down_allowed) {
next.down ();
TreeIter iter = model->get_iter (next);
if (!iter) {
/* can't go down, so move to next */
next = start;
next.next ();
}
} else {
next.next ();
}
iter = model->get_iter (next);
if (iter) {
treeview_select_one (selection, model, view, iter, next, col);
} else {
/* can't move down/next, so restart at selected and move up the tree */
next = start;
next.up ();
if (!next.empty()) {
iter = model->get_iter (next);
if (!iter) {
/* can't move up the tree*/
return;
} else {
/* moved up from child to parent, now move to next */
next.next();
}
iter = model->get_iter (next);
}
if (iter) {
treeview_select_one (selection, model, view, iter, next, col);
} else {
/* we could not forward, so wrap around to the first row */
next = model->get_path (model->children().begin());
treeview_select_one (selection, model, view, model->children().begin(), next, col);
}
}
}
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