add new code for generic select next/previous row ops in a treeview
git-svn-id: svn://localhost/ardour2/branches/3.0@7849 d708f5d6-7413-0410-9779-e7cbd77b26cf
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libs/gtkmm2ext/gtkmm2ext/treeutils.h
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38
libs/gtkmm2ext/gtkmm2ext/treeutils.h
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/*
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Copyright (C) 2010 Paul Davis
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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 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __libgtkmm2ext_treeutils_h__
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#define __libgtkmm2ext_treeutils_h__
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#include <gtkmm/treeview.h>
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#include <gtkmm/treemodel.h>
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#include <gtkmm/treeselection.h>
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#include <gtkmm/treepath.h>
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#include <gtkmm/treeiter.h>
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namespace Gtkmm2ext {
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void treeview_select_one (Glib::RefPtr<Gtk::TreeSelection> selection, Glib::RefPtr<Gtk::TreeModel> model, Gtk::TreeView& view,
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Gtk::TreeIter iter, Gtk::TreePath path, Gtk::TreeViewColumn* col);
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void treeview_select_previous (Gtk::TreeView& view, Glib::RefPtr<Gtk::TreeModel> model, Gtk::TreeViewColumn* col);
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void treeview_select_next (Gtk::TreeView& view, Glib::RefPtr<Gtk::TreeModel> model, Gtk::TreeViewColumn* col);
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}
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#endif /* __libgtkmm2ext_treeutils_h__ */
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libs/gtkmm2ext/treeutils.cc
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224
libs/gtkmm2ext/treeutils.cc
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/*
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Copyright (C) 2010 Paul Davis
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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 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "gtkmm2ext/treeutils.h"
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using namespace Glib;
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using namespace Gtk;
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void
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Gtkmm2ext::treeview_select_one (RefPtr<TreeSelection> selection, RefPtr<TreeModel> model, TreeView& view,
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TreeIter iter, TreePath path, TreeViewColumn* col)
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{
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if (!view.row_expanded (path)) {
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// cerr << "!! selecting a row that isn't expanded! " << path.to_string() << endl;
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}
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selection->unselect_all ();
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view.set_cursor (path, *col, true);
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}
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void
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Gtkmm2ext::treeview_select_previous (TreeView& view, RefPtr<TreeModel> model, TreeViewColumn* col)
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{
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RefPtr<TreeSelection> selection = view.get_selection();
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TreeView::Selection::ListHandle_Path rows = selection->get_selected_rows ();
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if (selection->count_selected_rows() == 0 || !col || model->children().size() < 2) {
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return;
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}
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TreeView::Selection::ListHandle_Path::iterator i = rows.begin();
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TreeModel::Path start = *i;
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TreePath prev = start;
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TreeIter iter;
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iter = model->get_iter (prev);
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if (iter == model->children().begin()) {
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/* at the start, go to the end */
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TreeIter x = iter;
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while (iter != model->children().end()) {
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x = iter;
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iter++;
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}
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/* "x" is now an iterator for the last row */
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iter = x;
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prev = model->get_path (iter);
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} else {
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prev.prev();
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}
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if (prev == start) {
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/* can't go back, go up */
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if (!prev.empty()) {
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prev.up ();
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}
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}
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iter = model->get_iter (prev);
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if (iter) {
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treeview_select_one (selection, model, view, iter, prev, col);
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} else {
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/* can't move to previous, so restart at selected and move up the tree */
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prev = start;
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prev.up ();
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if (!prev.empty()) {
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iter = model->get_iter (prev);
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if (!iter) {
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/* can't move up the tree*/
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return;
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} else {
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/* moved up from child to parent, now move to ??? */
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prev.prev();
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}
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iter = model->get_iter (prev);
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}
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if (iter) {
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treeview_select_one (selection, model, view, iter, prev, col);
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} else {
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/* we could not forward, so wrap around to the first row */
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/* grr: no nice way to get an iter for the
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last row, because there is no operator--
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for TreeIter
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*/
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TreeIter x = model->children().begin();
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TreeIter px = x;
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while (x != model->children().end()) {
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px = x;
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x++;
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}
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prev = model->get_path (px);
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treeview_select_one (selection, model, view, px, prev, col);
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}
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}
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}
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void
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Gtkmm2ext::treeview_select_next (TreeView& view, RefPtr<TreeModel> model, TreeViewColumn* col)
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{
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RefPtr<TreeSelection> selection = view.get_selection();
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TreeView::Selection::ListHandle_Path rows = selection->get_selected_rows ();
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if (selection->count_selected_rows() == 0 || !col || model->children().size() < 2) {
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return;
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}
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/* start with the last selected row, not the first */
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TreeView::Selection::ListHandle_Path::iterator i = rows.begin();
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TreeView::Selection::ListHandle_Path::iterator p = i;
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/* get the last selected row */
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while (i != rows.end()) {
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p = i;
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++i;
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}
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TreeModel::Path start = *p;
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TreePath next = start;
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TreeIter iter;
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/* if the row we intend to start from has children but it is not expanded,
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do not try to go down.
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*/
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iter = model->get_iter (start);
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TreeRow row = (*iter);
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bool down_allowed = true;
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if (!row.children().empty()) {
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TreePath tp = model->get_path (iter);
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if (!view.row_expanded (tp)) {
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down_allowed = false;
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}
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}
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start = next;
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if (down_allowed) {
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next.down ();
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TreeIter iter = model->get_iter (next);
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if (!iter) {
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/* can't go down, so move to next */
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next = start;
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next.next ();
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}
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} else {
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next.next ();
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}
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iter = model->get_iter (next);
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if (iter) {
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treeview_select_one (selection, model, view, iter, next, col);
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} else {
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/* can't move down/next, so restart at selected and move up the tree */
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next = start;
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next.up ();
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if (!next.empty()) {
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iter = model->get_iter (next);
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if (!iter) {
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/* can't move up the tree*/
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return;
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} else {
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/* moved up from child to parent, now move to next */
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next.next();
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}
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iter = model->get_iter (next);
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}
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if (iter) {
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treeview_select_one (selection, model, view, iter, next, col);
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} else {
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/* we could not forward, so wrap around to the first row */
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next = model->get_path (model->children().begin());
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treeview_select_one (selection, model, view, model->children().begin(), next, col);
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}
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}
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}
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@ -50,6 +50,7 @@ gtkmm2ext_sources = [
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'stateful_button.cc',
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'tearoff.cc',
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'textviewer.cc',
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'treeutils.cc',
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'utils.cc',
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'version.cc',
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'window_title.cc'
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