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using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
namespace MaterialDesignThemes.Wpf
{
[TemplateVisualState(GroupName = "CommonStates", Name = TemplateStateNormal)]
[TemplateVisualState(GroupName = "CommonStates", Name = TemplateStateMousePressed)]
[TemplateVisualState(GroupName = "CommonStates", Name = TemplateStateMouseOut)]
public class Ripple : ContentControl
{
public const string TemplateStateNormal = "Normal";
public const string TemplateStateMousePressed = "MousePressed";
public const string TemplateStateMouseOut = "MouseOut";
private static readonly HashSet<Ripple> PressedInstances = new HashSet<Ripple>();
static Ripple()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(Ripple), new FrameworkPropertyMetadata(typeof(Ripple)));
EventManager.RegisterClassHandler(typeof(ContentControl), Mouse.PreviewMouseUpEvent, new MouseButtonEventHandler(MouseButtonEventHandler), true);
EventManager.RegisterClassHandler(typeof(ContentControl), Mouse.MouseMoveEvent, new MouseEventHandler(MouseMouveEventHandler), true);
EventManager.RegisterClassHandler(typeof(Popup), Mouse.PreviewMouseUpEvent, new MouseButtonEventHandler(MouseButtonEventHandler), true);
EventManager.RegisterClassHandler(typeof(Popup), Mouse.MouseMoveEvent, new MouseEventHandler(MouseMouveEventHandler), true);
}
public Ripple()
{
SizeChanged += OnSizeChanged;
}
private static void MouseButtonEventHandler(object sender, MouseButtonEventArgs e)
{
foreach (var ripple in PressedInstances)
{
// adjust the transition scale time according to the current animated scale
var scaleTrans = ripple.Template.FindName("ScaleTransform", ripple) as ScaleTransform;
if (scaleTrans != null)
{
double currentScale = scaleTrans.ScaleX;
var newTime = TimeSpan.FromMilliseconds(300 * (1.0 - currentScale));
// change the scale animation according to the current scale
var scaleXKeyFrame = ripple.Template.FindName("MousePressedToNormalScaleXKeyFrame", ripple) as EasingDoubleKeyFrame;
if (scaleXKeyFrame != null)
{
scaleXKeyFrame.KeyTime = KeyTime.FromTimeSpan(newTime);
}
var scaleYKeyFrame = ripple.Template.FindName("MousePressedToNormalScaleYKeyFrame", ripple) as EasingDoubleKeyFrame;
if (scaleYKeyFrame != null)
{
scaleYKeyFrame.KeyTime = KeyTime.FromTimeSpan(newTime);
}
}
VisualStateManager.GoToState(ripple, TemplateStateNormal, true);
}
PressedInstances.Clear();
}
protected override void OnTouchLeave(TouchEventArgs e)
{
foreach (var ripple in PressedInstances.ToList())
{
var relativePosition = e.GetTouchPoint(ripple).Position;
if (relativePosition.X < 0
|| relativePosition.Y < 0
|| relativePosition.X >= ripple.ActualWidth
|| relativePosition.Y >= ripple.ActualHeight)
{
VisualStateManager.GoToState(ripple, TemplateStateMouseOut, true);
PressedInstances.Remove(ripple);
}
}
}
private static void MouseMouveEventHandler(object sender, MouseEventArgs e)
{
foreach (var ripple in PressedInstances.ToList())
{
var relativePosition = Mouse.GetPosition(ripple);
if (relativePosition.X < 0
|| relativePosition.Y < 0
|| relativePosition.X >= ripple.ActualWidth
|| relativePosition.Y >= ripple.ActualHeight)
{
VisualStateManager.GoToState(ripple, TemplateStateMouseOut, true);
PressedInstances.Remove(ripple);
}
}
}
public static readonly DependencyProperty FeedbackProperty = DependencyProperty.Register(
nameof(Feedback), typeof(Brush), typeof(Ripple), new PropertyMetadata(default(Brush)));
public Brush Feedback
{
get { return (Brush)GetValue(FeedbackProperty); }
set { SetValue(FeedbackProperty, value); }
}
protected override void OnPreviewTouchDown(TouchEventArgs e)
{
var point = e.GetTouchPoint(this);
if (RippleAssist.GetIsCentered(this))
{
var innerContent = (Content as FrameworkElement);
if (innerContent != null)
{
var position = innerContent.TransformToAncestor(this)
.Transform(new Point(0, 0));
RippleX = position.X + innerContent.ActualWidth / 2 - RippleSize / 2;
RippleY = position.Y + innerContent.ActualHeight / 2 - RippleSize / 2;
}
else
{
RippleX = ActualWidth / 2 - RippleSize / 2;
RippleY = ActualHeight / 2 - RippleSize / 2;
}
}
else
{
RippleX = point.Position.X - RippleSize / 2;
RippleY = point.Position.Y - RippleSize / 2;
}
if (!RippleAssist.GetIsDisabled(this))
{
VisualStateManager.GoToState(this, TemplateStateNormal, false);
VisualStateManager.GoToState(this, TemplateStateMousePressed, true);
PressedInstances.Add(this);
}
base.OnPreviewTouchDown(e);
}
protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
{
var point = e.GetPosition(this);
if (RippleAssist.GetIsCentered(this))
{
var innerContent = (Content as FrameworkElement);
if (innerContent != null)
{
var position = innerContent.TransformToAncestor(this)
.Transform(new Point(0, 0));
RippleX = position.X + innerContent.ActualWidth / 2 - RippleSize / 2;
RippleY = position.Y + innerContent.ActualHeight / 2 - RippleSize / 2;
}
else
{
RippleX = ActualWidth / 2 - RippleSize / 2;
RippleY = ActualHeight / 2 - RippleSize / 2;
}
}
else
{
RippleX = point.X - RippleSize / 2;
RippleY = point.Y - RippleSize / 2;
}
if (!RippleAssist.GetIsDisabled(this))
{
VisualStateManager.GoToState(this, TemplateStateNormal, false);
VisualStateManager.GoToState(this, TemplateStateMousePressed, true);
PressedInstances.Add(this);
}
base.OnPreviewMouseLeftButtonDown(e);
}
private static readonly DependencyPropertyKey RippleSizePropertyKey =
DependencyProperty.RegisterReadOnly(
"RippleSize", typeof(double), typeof(Ripple),
new PropertyMetadata(default(double)));
public static readonly DependencyProperty RippleSizeProperty =
RippleSizePropertyKey.DependencyProperty;
public double RippleSize
{
get { return (double)GetValue(RippleSizeProperty); }
private set { SetValue(RippleSizePropertyKey, value); }
}
private static readonly DependencyPropertyKey RippleXPropertyKey =
DependencyProperty.RegisterReadOnly(
"RippleX", typeof(double), typeof(Ripple),
new PropertyMetadata(default(double)));
public static readonly DependencyProperty RippleXProperty =
RippleXPropertyKey.DependencyProperty;
public double RippleX
{
get { return (double)GetValue(RippleXProperty); }
private set { SetValue(RippleXPropertyKey, value); }
}
private static readonly DependencyPropertyKey RippleYPropertyKey =
DependencyProperty.RegisterReadOnly(
"RippleY", typeof(double), typeof(Ripple),
new PropertyMetadata(default(double)));
public static readonly DependencyProperty RippleYProperty =
RippleYPropertyKey.DependencyProperty;
public double RippleY
{
get { return (double)GetValue(RippleYProperty); }
private set { SetValue(RippleYPropertyKey, value); }
}
/// <summary>
/// The DependencyProperty for the RecognizesAccessKey property.
/// Default Value: false
/// </summary>
public static readonly DependencyProperty RecognizesAccessKeyProperty =
DependencyProperty.Register(
nameof(RecognizesAccessKey), typeof(bool), typeof(Ripple),
new PropertyMetadata(default(bool)));
/// <summary>
/// Determine if Ripple should use AccessText in its style
/// </summary>
public bool RecognizesAccessKey
{
get { return (bool)GetValue(RecognizesAccessKeyProperty); }
set { SetValue(RecognizesAccessKeyProperty, value); }
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
VisualStateManager.GoToState(this, TemplateStateNormal, false);
}
private void OnSizeChanged(object sender, SizeChangedEventArgs sizeChangedEventArgs)
{
var innerContent = (Content as FrameworkElement);
double width, height;
if (RippleAssist.GetIsCentered(this) && innerContent != null)
{
width = innerContent.ActualWidth;
height = innerContent.ActualHeight;
}
else
{
width = sizeChangedEventArgs.NewSize.Width;
height = sizeChangedEventArgs.NewSize.Height;
}
var radius = Math.Sqrt(Math.Pow(width, 2) + Math.Pow(height, 2));
RippleSize = 2 * radius * RippleAssist.GetRippleSizeMultiplier(this);
}
}
}
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