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  • Committer: Nick Dedekind
  • Date: 2016-08-25 14:43:02 UTC
  • Revision ID: nick.dedekind@canonical.com-20160825144302-9gzc6c8y0ne0f9j7
menus ui

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src/Ubuntu/Components/Private/1.3/MenuNavigator.qml
 
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/*
 
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 * Copyright 2016 Canonical Ltd.
 
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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 Lesser General Public License as published by
 
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 * the Free Software Foundation; version 3.
 
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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 Lesser General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU Lesser 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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 * Author: Nick Dedekind <nick.dedekind@canonical.com>
 
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 */
 
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import QtQuick 2.4
 
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QtObject {
 
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    id: root
 
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    // items to navigate through
 
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    property QtObject model
 
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    signal select(int index)
 
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    function selectNext(currentIndex) {
 
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        var delegate;
 
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        var newIndex = 0;
 
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        if (currentIndex === -1 && model.count > 0) {
 
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            while (model.count > newIndex) {
 
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                delegate = model.get(newIndex);
 
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                if (!!delegate["enabled"]) {
 
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                    select(newIndex);
 
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                    break;
 
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                }
 
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                newIndex++;
 
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            }
 
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        } else if (currentIndex !== -1 && model.count > 1) {
 
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            var startIndex = (currentIndex + 1) % model.count;
 
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            newIndex = startIndex;
 
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            do {
 
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                delegate = model.get(newIndex);
 
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                if (!!delegate["enabled"]) {
 
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                    select(newIndex);
 
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                    break;
 
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                }
 
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                newIndex = (newIndex + 1) % model.count;
 
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            } while (newIndex !== startIndex)
 
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        }
 
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    }
 
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    function selectPrevious(currentIndex) {
 
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        var delegate;
 
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        var newIndex = model.count-1;
 
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        if (currentIndex === -1 && model.count > 0) {
 
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            while (model.count > newIndex) {
 
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                delegate = model.get(newIndex);
 
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                if (!!delegate["enabled"]) {
 
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                    select(newIndex);
 
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                    break;
 
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                }
 
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                newIndex--;
 
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            }
 
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        } else if (currentIndex !== -1 && model.count > 1) {
 
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            var startIndex = currentIndex - 1;
 
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            newIndex = startIndex;
 
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            do {
 
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                if (newIndex < 0) {
 
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                    newIndex = model.count - 1;
 
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                }
 
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                delegate = model.get(newIndex);
 
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                if (!!delegate["enabled"]) {
 
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                    select(newIndex);
 
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                    break;
 
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                }
 
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                newIndex--;
 
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            } while (newIndex !== startIndex)
 
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        }
 
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    }
 
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}
 
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