104 lines
2.7 KiB
C#
104 lines
2.7 KiB
C#
/*
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* Copyright (c) 2017 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System.Windows;
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using System.Windows.Input;
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using System.Windows.Interop;
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using System.Windows.Media;
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using SafeExamBrowser.Contracts.UserInterface;
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namespace SafeExamBrowser.UserInterface
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{
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public partial class Taskbar : Window, ITaskbar
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{
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public Taskbar()
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{
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InitializeComponent();
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Loaded += Taskbar_Loaded;
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}
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private void Taskbar_Loaded(object sender, RoutedEventArgs e)
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{
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Width = SystemParameters.WorkArea.Right;
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Left = SystemParameters.WorkArea.Right - Width;
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Top = SystemParameters.WorkArea.Bottom;
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}
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public void AddButton(ITaskbarButton button)
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{
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if (button is UIElement)
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{
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ApplicationStackPanel.Children.Add(button as UIElement);
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}
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}
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public void AddNotification(ITaskbarNotification button)
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{
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if (button is UIElement)
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{
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NotificationWrapPanel.Children.Add(button as UIElement);
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}
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}
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public int GetAbsoluteHeight()
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{
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// WPF works with device-independent pixels. The following code is required
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// to get the real height of the taskbar (in absolute, device-specific pixels).
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// Source: https://stackoverflow.com/questions/3286175/how-do-i-convert-a-wpf-size-to-physical-pixels
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Matrix transformToDevice;
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var source = PresentationSource.FromVisual(this);
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if (source != null)
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{
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transformToDevice = source.CompositionTarget.TransformToDevice;
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}
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else
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{
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using (var newSource = new HwndSource(new HwndSourceParameters()))
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{
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transformToDevice = newSource.CompositionTarget.TransformToDevice;
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}
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}
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return (int) transformToDevice.Transform((Vector) new Size(Width, Height)).Y;
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}
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private void ApplicationScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
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{
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var scrollAmount = 20;
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if (ApplicationScrollViewer.IsMouseOver)
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{
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if (e.Delta < 0)
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{
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if (ApplicationScrollViewer.HorizontalOffset + scrollAmount > 0)
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{
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ApplicationScrollViewer.ScrollToHorizontalOffset(ApplicationScrollViewer.HorizontalOffset + scrollAmount);
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}
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else
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{
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ApplicationScrollViewer.ScrollToLeftEnd();
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}
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}
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else
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{
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if (ApplicationScrollViewer.ExtentWidth > ApplicationScrollViewer.HorizontalOffset - scrollAmount)
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{
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ApplicationScrollViewer.ScrollToHorizontalOffset(ApplicationScrollViewer.HorizontalOffset - scrollAmount);
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}
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else
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{
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ApplicationScrollViewer.ScrollToRightEnd();
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}
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}
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}
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}
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}
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}
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