QuickLook/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/Converters.cs

// Copyright © 2017 Paddy Xu
// 
// This file is part of QuickLook program.
// 
// 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 3 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, see <http://www.gnu.org/licenses/>.

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace QuickLook.Plugin.VideoViewer
{
    public sealed class TimeTickToShortStringConverter : DependencyObject, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null)
                return "00:00";

            var v = TimeSpan.FromTicks((long) value);

            var s = string.Empty;
            if (v.Hours > 0)
                s += $"{v.Hours:D2}:";

            s += $"{v.Minutes:D2}:{v.Seconds:D2}";

            return s;
        }

        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public sealed class VolumeToIconConverter : DependencyObject, IValueConverter
    {
        private static readonly string[] Volumes = {"\xE74F", "\xE993", "\xE994", "\xE995"};

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null)
                return Volumes[0];

            var v = (double) value;
            if (Math.Abs(v) < 0.01)
                return Volumes[0];

            v = Math.Min(v, 1);

            return Volumes[1 + (int) (v / 0.34)];
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}