QuickLook/QuickLook/ViewerWindow.xaml.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.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using QuickLook.Controls;
using QuickLook.Helpers;
using QuickLook.Plugin;

namespace QuickLook
{
    /// <summary>
    ///     Interaction logic for ViewerWindow.xaml
    /// </summary>
    public partial class ViewerWindow : MainWindowBase
    {
        private string _path;
        private bool _restoreForDragMove;

        internal ViewerWindow()
        {
            // this object should be initialized before loading UI components, because many of which are binding to it.
            ContextObject = new ContextObject();

            InitializeComponent();

            FontFamily = new FontFamily(TranslationHelper.GetString("UI_FontFamily", failsafe: "Segoe UI"));

            windowCaptionContainer.MouseLeftButtonDown += WindowDragMoveStart;
            windowCaptionContainer.MouseMove += WindowDragMoving;
            windowCaptionContainer.MouseLeftButtonUp += WindowDragMoveEnd;

            windowFrameContainer.PreviewMouseMove += ShowWindowCaptionContainer;

            buttonTop.Click += (sender, e) =>
            {
                Topmost = !Topmost;
                buttonTop.Tag = Topmost ? "Top" : "Auto";
            };

            buttonPin.Click += (sender, e) =>
            {
                if (Pinned)
                    return;

                Pinned = true;
                buttonPin.Tag = "Pin";
                ViewWindowManager.GetInstance().ForgetCurrentWindow();
            };

            buttonCloseWindow.Click += (sender, e) =>
            {
                if (Pinned)
                    BeginClose();
                else
                    ViewWindowManager.GetInstance().ClosePreview();
            };

            buttonOpenWith.Click += (sender, e) =>
            {
                if (Pinned)
                    RunAndClose();
                else
                    ViewWindowManager.GetInstance().RunAndClosePreview();
            };

            buttonWindowStatus.Click += (sender, e) =>
                WindowState = WindowState == WindowState.Maximized ? WindowState.Normal : WindowState.Maximized;

            buttonShare.Click += Share;
        }

        private void ShowWindowCaptionContainer(object sender, MouseEventArgs e)
        {
            var show = (Storyboard) windowCaptionContainer.FindResource("ShowCaptionContainerStoryboard");

            if (windowCaptionContainer.Opacity == 0 || windowCaptionContainer.Opacity == 1)
                show.Begin();
        }

        private void AutoHideCaptionContainer(object sender, EventArgs e)
        {
            if (!ContextObject.TitlebarAutoHide)
                return;

            if (!ContextObject.TitlebarOverlap)
                return;

            if (windowCaptionContainer.IsMouseOver)
                return;

            var hide = (Storyboard) windowCaptionContainer.FindResource("HideCaptionContainerStoryboard");

            hide.Begin();
        }

        private void WindowDragMoveEnd(object sender, MouseButtonEventArgs e)
        {
            _restoreForDragMove = false;
        }

        private void WindowDragMoving(object sender, MouseEventArgs e)
        {
            if (e.LeftButton != MouseButtonState.Pressed)
                return;
            if (!_restoreForDragMove)
                return;
            _restoreForDragMove = false;

            var scale = DpiHelper.GetCurrentScaleFactor();
            var point = PointToScreen(e.MouseDevice.GetPosition(this));
            point.X /= scale.Horizontal;
            point.Y /= scale.Vertical;

            var monitor = WindowHelper.GetCurrentWindowRect();
            var precentLeft = (point.X - monitor.Left) / monitor.Width;
            var precentTop = (point.Y - monitor.Top) / monitor.Height;

            Left = point.X - RestoreBounds.Width * precentLeft;
            Top = point.Y - RestoreBounds.Height * precentTop;

            WindowState = WindowState.Normal;

            if (e.LeftButton == MouseButtonState.Pressed)
                DragMove();
        }

        private void WindowDragMoveStart(object sender, MouseButtonEventArgs e)
        {
            if (e.ClickCount == 2)
            {
                if (ResizeMode != ResizeMode.CanResize &&
                    ResizeMode != ResizeMode.CanResizeWithGrip)
                    return;

                WindowState = WindowState == WindowState.Maximized
                    ? WindowState.Normal
                    : WindowState.Maximized;
            }
            else
            {
                _restoreForDragMove = WindowState == WindowState.Maximized;
                if (e.LeftButton == MouseButtonState.Pressed)
                    DragMove();
            }
        }
    }
}