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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="Loading.xaml.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// Interaction logic for Loading.xaml
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.Controls
{
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Threading;
/// <summary>
/// Interaction logic for Loading.xaml
/// </summary>
public partial class Loading : UserControl
{
#region Fields
/// <summary>
/// Step
/// </summary>
private const double Step = Math.PI * 2 / 10.0;
/// <summary>
/// Timer for the spinning effect.
/// </summary>
private readonly DispatcherTimer timer;
#endregion
#region Constructors
/// <summary>
/// Initializes a new instance of the <see cref="Loading"/> class.
/// </summary>
public Loading()
{
InitializeComponent();
IsVisibleChanged += OnVisibleChanged;
this.timer = new DispatcherTimer(DispatcherPriority.ContextIdle, Dispatcher)
{
Interval = new TimeSpan(0, 0, 0, 0, 75)
};
}
#endregion
/// <summary>
/// Sets the position.
/// </summary>
/// <param name="ellipse">The ellipse.</param>
/// <param name="offset">The offset.</param>
/// <param name="posOffSet">The pos off set.</param>
/// <param name="step">The step to change.</param>
private static void SetPosition(DependencyObject ellipse, double offset, double posOffSet, double step)
{
ellipse.SetValue(Canvas.LeftProperty, 50 + (Math.Sin(offset + (posOffSet * step)) * 50));
ellipse.SetValue(Canvas.TopProperty, 50 + (Math.Cos(offset + (posOffSet * step)) * 50));
}
/// <summary>
/// Starts this instance.
/// </summary>
private void Start()
{
this.timer.Tick += this.OnTick;
this.timer.Start();
}
/// <summary>
/// Stops this instance.
/// </summary>
private void Stop()
{
this.timer.Stop();
this.timer.Tick -= this.OnTick;
}
/// <summary>
/// Run the Animation
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void OnTick(object sender, EventArgs e)
{
this.rotate.Angle = (this.rotate.Angle + 36) % 360;
}
/// <summary>
/// Start and Stop the effect when the visibility changes
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void OnVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
if ((bool)e.NewValue)
{
Start();
}
else
{
Stop();
}
}
/// <summary>
/// Setup the Canvas
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void CanvasLoaded(object sender, RoutedEventArgs e)
{
SetPosition(this.circle0, Math.PI, 0.0, Step);
SetPosition(this.circle1, Math.PI, 1.0, Step);
SetPosition(this.circle2, Math.PI, 2.0, Step);
SetPosition(this.circle3, Math.PI, 3.0, Step);
SetPosition(this.circle4, Math.PI, 4.0, Step);
SetPosition(this.circle5, Math.PI, 5.0, Step);
SetPosition(this.circle6, Math.PI, 6.0, Step);
SetPosition(this.circle7, Math.PI, 7.0, Step);
SetPosition(this.circle8, Math.PI, 8.0, Step);
}
/// <summary>
/// Stop when we unload this canvas
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void CanvasUnloaded(object sender, RoutedEventArgs e)
{
Stop();
}
}
}
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