--- /dev/null
+/*
+ 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.
+
+*/
+
+#ifndef __libgtkmm2ext_treeutils_h__
+#define __libgtkmm2ext_treeutils_h__
+
+#include <gtkmm/treeview.h>
+#include <gtkmm/treemodel.h>
+#include <gtkmm/treeselection.h>
+#include <gtkmm/treepath.h>
+#include <gtkmm/treeiter.h>
+
+namespace Gtkmm2ext {
+
+ void treeview_select_one (Glib::RefPtr<Gtk::TreeSelection> selection, Glib::RefPtr<Gtk::TreeModel> model, Gtk::TreeView& view,
+ Gtk::TreeIter iter, Gtk::TreePath path, Gtk::TreeViewColumn* col);
+ void treeview_select_previous (Gtk::TreeView& view, Glib::RefPtr<Gtk::TreeModel> model, Gtk::TreeViewColumn* col);
+ void treeview_select_next (Gtk::TreeView& view, Glib::RefPtr<Gtk::TreeModel> model, Gtk::TreeViewColumn* col);
+}
+
+#endif /* __libgtkmm2ext_treeutils_h__ */
+
--- /dev/null
+/*
+ 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 "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 = true;
+
+ if (!row.children().empty()) {
+ TreePath tp = model->get_path (iter);
+
+ if (!view.row_expanded (tp)) {
+ down_allowed = false;
+ }
+ }
+
+ 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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