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using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Input;
namespace MediaBrowser.UI.Controls
{
/// <summary>
/// Provides a base class for all Windows
/// </summary>
public abstract class BaseWindow : Window, INotifyPropertyChanged
{
/// <summary>
/// Occurs when [property changed].
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Called when [property changed].
/// </summary>
/// <param name="info">The info.</param>
public void OnPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
/// <summary>
/// The _content scale
/// </summary>
private double _contentScale = 1;
/// <summary>
/// Gets the content scale.
/// </summary>
/// <value>The content scale.</value>
public double ContentScale
{
get { return _contentScale; }
private set
{
_contentScale = value;
OnPropertyChanged("ContentScale");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="BaseWindow" /> class.
/// </summary>
protected BaseWindow()
: base()
{
SizeChanged += MainWindow_SizeChanged;
Loaded += BaseWindowLoaded;
}
/// <summary>
/// Bases the window loaded.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="RoutedEventArgs" /> instance containing the event data.</param>
void BaseWindowLoaded(object sender, RoutedEventArgs e)
{
OnLoaded();
}
/// <summary>
/// Called when [loaded].
/// </summary>
protected virtual void OnLoaded()
{
MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
/// <summary>
/// Handles the SizeChanged event of the MainWindow control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="SizeChangedEventArgs" /> instance containing the event data.</param>
void MainWindow_SizeChanged(object sender, SizeChangedEventArgs e)
{
ContentScale = e.NewSize.Height / 1080;
}
/// <summary>
/// Called when [browser back].
/// </summary>
protected virtual void OnBrowserBack()
{
}
/// <summary>
/// Called when [browser forward].
/// </summary>
protected virtual void OnBrowserForward()
{
}
/// <summary>
/// Invoked when an unhandled <see cref="E:System.Windows.Input.Keyboard.PreviewKeyDown" /> attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.
/// </summary>
/// <param name="e">The <see cref="T:System.Windows.Input.KeyEventArgs" /> that contains the event data.</param>
protected override void OnPreviewKeyDown(KeyEventArgs e)
{
if (IsBackPress(e))
{
e.Handled = true;
if (!e.IsRepeat)
{
OnBrowserBack();
}
}
else if (IsForwardPress(e))
{
e.Handled = true;
if (!e.IsRepeat)
{
OnBrowserForward();
}
}
base.OnPreviewKeyDown(e);
}
/// <summary>
/// Determines if a keypress should be treated as a backward press
/// </summary>
/// <param name="e">The <see cref="KeyEventArgs" /> instance containing the event data.</param>
/// <returns><c>true</c> if [is back press] [the specified e]; otherwise, <c>false</c>.</returns>
private bool IsBackPress(KeyEventArgs e)
{
if (e.Key == Key.Escape)
{
return true;
}
if (e.Key == Key.BrowserBack || e.Key == Key.Back)
{
return true;
}
if (e.SystemKey == Key.Left && e.KeyboardDevice.Modifiers.HasFlag(ModifierKeys.Alt))
{
return true;
}
return false;
}
/// <summary>
/// Determines if a keypress should be treated as a forward press
/// </summary>
/// <param name="e">The <see cref="KeyEventArgs" /> instance containing the event data.</param>
/// <returns><c>true</c> if [is forward press] [the specified e]; otherwise, <c>false</c>.</returns>
private bool IsForwardPress(KeyEventArgs e)
{
if (e.Key == Key.BrowserForward)
{
return true;
}
if (e.SystemKey == Key.RightAlt && e.KeyboardDevice.Modifiers.HasFlag(ModifierKeys.Alt))
{
return true;
}
return false;
}
}
}
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