MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Muchinfo.DataPager/Base/MuchinfoPagerNavigationButton.cs

using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Threading;

namespace Muchinfo.DataPager.Base
{
    public class MuchinfoPagerNavigationButton : Button
    {
        public static readonly DependencyProperty HoverDelayProperty;
        public static readonly DependencyProperty CornerRadiusProperty;
        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public static readonly DependencyProperty InnerCornerRadiusProperty;
        public static readonly DependencyProperty IsBackgroundVisibleProperty;
        public static readonly RoutedEvent ActivateEvent;
        public static readonly RoutedEvent HoverEvent;
        private DispatcherTimer hoverTimer;
        public event EventHandler<MuchinfoRoutedEventArgs> Activate
        {
            add
            {
                base.AddHandler(MuchinfoPagerNavigationButton.ActivateEvent, value);
            }
            remove
            {
                base.RemoveHandler(MuchinfoPagerNavigationButton.ActivateEvent, value);
            }
        }
        [Browsable(false)]
        public event EventHandler<MuchinfoRoutedEventArgs> Hover
        {
            add
            {
                base.AddHandler(MuchinfoPagerNavigationButton.HoverEvent, value);
            }
            remove
            {
                base.RemoveHandler(MuchinfoPagerNavigationButton.HoverEvent, value);
            }
        }
        [Browsable(false)]
        public TimeSpan HoverDelay
        {
            get
            {
                return (TimeSpan)base.GetValue(MuchinfoPagerNavigationButton.HoverDelayProperty);
            }
            set
            {
                base.SetValue(MuchinfoPagerNavigationButton.HoverDelayProperty, value);
            }
        }
        public CornerRadius CornerRadius
        {
            get
            {
                return (CornerRadius)base.GetValue(MuchinfoPagerNavigationButton.CornerRadiusProperty);
            }
            set
            {
                base.SetValue(MuchinfoPagerNavigationButton.CornerRadiusProperty, value);
            }
        }
        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public CornerRadius InnerCornerRadius
        {
            get
            {
                return (CornerRadius)base.GetValue(MuchinfoPagerNavigationButton.InnerCornerRadiusProperty);
            }
            set
            {
                base.SetValue(MuchinfoPagerNavigationButton.InnerCornerRadiusProperty, value);
            }
        }
        [Browsable(false)]
        public bool IsBackgroundVisible
        {
            get
            {
                return (bool)base.GetValue(MuchinfoPagerNavigationButton.IsBackgroundVisibleProperty);
            }
            set
            {
                base.SetValue(MuchinfoPagerNavigationButton.IsBackgroundVisibleProperty, value);
            }
        }
        static MuchinfoPagerNavigationButton()
        {
            MuchinfoPagerNavigationButton.HoverDelayProperty = DependencyProperty.Register("HoverDelay", typeof(TimeSpan), typeof(MuchinfoPagerNavigationButton), new PropertyMetadata(TimeSpan.Zero, new PropertyChangedCallback(MuchinfoPagerNavigationButton.OnHoverDelayChanged)));
            MuchinfoPagerNavigationButton.CornerRadiusProperty = DependencyProperty.Register("CornerRadius", typeof(CornerRadius), typeof(MuchinfoPagerNavigationButton), new PropertyMetadata(new PropertyChangedCallback(MuchinfoPagerNavigationButton.OnCornerRadiusChanged)));
            MuchinfoPagerNavigationButton.InnerCornerRadiusProperty = DependencyProperty.Register("InnerCornerRadius", typeof(CornerRadius), typeof(MuchinfoPagerNavigationButton), new PropertyMetadata());
            MuchinfoPagerNavigationButton.IsBackgroundVisibleProperty = DependencyProperty.Register("IsBackgroundVisible", typeof(bool), typeof(MuchinfoPagerNavigationButton), new PropertyMetadata(true, new PropertyChangedCallback(MuchinfoPagerNavigationButton.OnIsBackgroundVisiblePropertyChanged)));
            MuchinfoPagerNavigationButton.ActivateEvent = EventManager.RegisterRoutedEvent("Activate", RoutingStrategy.Bubble, typeof(EventHandler<MuchinfoRoutedEventArgs>), typeof(MuchinfoPagerNavigationButton));
            MuchinfoPagerNavigationButton.HoverEvent = EventManager.RegisterRoutedEvent("Hover", RoutingStrategy.Bubble, typeof(EventHandler<MuchinfoRoutedEventArgs>), typeof(MuchinfoPagerNavigationButton));
            FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(MuchinfoPagerNavigationButton), new FrameworkPropertyMetadata(typeof(MuchinfoPagerNavigationButton)));
        }
        public MuchinfoPagerNavigationButton()
        {
            //TelerikLicense.Verify(this);
        }
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            this.UpdateVisualStates(false);
            this.UpdateBackgroundVisibility();
        }
        internal static MuchinfoRoutedEventArgs RaiseRadRoutedEvent(RoutedEvent routedEvent, UIElement source)
        {
            MuchinfoRoutedEventArgs radRoutedEventArgs = new MuchinfoRoutedEventArgs(routedEvent, source);
            source.RaiseEvent(radRoutedEventArgs);
            return radRoutedEventArgs;
        }
        internal static bool HasChildOf(DependencyObject parent, DependencyObject child, bool skipParent)
        {
            if (parent == null || child == null)
            {
                return false;
            }
            if (!skipParent && parent == child)
            {
                return true;
            }
            FrameworkElement frameworkElement = child as FrameworkElement;
            DependencyObject parent2 = VisualTreeHelper.GetParent(child);
            if (parent2 == null && frameworkElement != null)
            {
                parent2 = frameworkElement.Parent;
            }
            return MuchinfoPagerNavigationButton.HasChildOf(parent, parent2, false);
        }
        internal virtual void UpdateVisualStates(bool useTransitions)
        {
            if (!base.IsEnabled)
            {
                this.GoToState("Disabled", useTransitions);
            }
            else
            {
                if (base.IsPressed)
                {
                    this.GoToState("Pressed", useTransitions);
                }
                else
                {
                    if (base.IsMouseOver)
                    {
                        this.GoToState("MouseOver", useTransitions);
                    }
                    else
                    {
                        this.GoToState("Normal", useTransitions);
                    }
                }
            }
            if (base.IsFocused && base.IsEnabled)
            {
                this.GoToState("Focused", useTransitions);
                return;
            }
            this.GoToState("Unfocused", useTransitions);
        }
        internal virtual void UpdateBackgroundVisibility()
        {
            if (this.IsBackgroundVisible || base.IsMouseOver || base.IsPressed)
            {
                this.GoToState("BackgroundVisible", false);
            }
            else
            {
                this.GoToState("BackgroundHidden", false);
            }
            if (this.IsBackgroundVisible)
            {
                this.GoToState("BackgroundIsVisible", false);
                return;
            }
            this.GoToState("BackgroundIsHidden", false);
        }
        internal bool GoToState(string stateName, bool useTransitions)
        {
            return VisualStateManager.GoToState(this, stateName, useTransitions);
        }
        internal void OnClickInternal()
        {
            this.OnClick();
        }
        protected internal virtual void OnActivate()
        {
            base.RaiseEvent(new MuchinfoRoutedEventArgs(MuchinfoPagerNavigationButton.ActivateEvent, this));
        }
        protected internal virtual void OnHover()
        {
            base.RaiseEvent(new MuchinfoRoutedEventArgs(MuchinfoPagerNavigationButton.HoverEvent, this));
        }
        protected override void OnClick()
        {
            base.OnClick();
            this.OnActivate();
            //TraceMonitor.TrackAtomicFeature(this, "Click");
        }
        protected override void OnLostFocus(RoutedEventArgs e)
        {
            base.OnLostFocus(e);
            this.UpdateBackgroundVisibility();
        }
        protected override void OnGotFocus(RoutedEventArgs e)
        {
            base.OnGotFocus(e);
            this.UpdateBackgroundVisibility();
        }

        protected override void OnMouseEnter(MouseEventArgs e)
        {
            base.OnMouseEnter(e);
            this.HoverTimerStart();
            this.UpdateBackgroundVisibility();
        }
        protected override void OnMouseLeave(MouseEventArgs e)
        {
            this.HoverTimerStop();
            base.OnMouseLeave(e);
            this.UpdateBackgroundVisibility();
        }
        protected override void OnMouseMove(MouseEventArgs e)
        {
            this.HoverTimerRestart();
            base.OnMouseMove(e);
        }
        protected override void OnKeyDown(KeyEventArgs e)
        {
            base.OnKeyDown(e);
        }
        private static void OnHoverDelayChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MuchinfoPagerNavigationButton radButton = d as MuchinfoPagerNavigationButton;
            if (radButton != null)
            {
                radButton.HoverTimerApplyState(true);
            }
        }
        private static void OnCornerRadiusChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MuchinfoPagerNavigationButton radButton = d as MuchinfoPagerNavigationButton;
            CornerRadius cornerRadius = (CornerRadius)e.NewValue;
            if (radButton != null)
            {
                radButton.InnerCornerRadius = new CornerRadius(Math.Max(0.0, cornerRadius.TopLeft - 1.0), Math.Max(0.0, cornerRadius.TopRight - 1.0), Math.Max(0.0, cornerRadius.BottomRight - 1.0), Math.Max(0.0, cornerRadius.BottomLeft - 1.0));
            }
        }
        private static void OnIsBackgroundVisiblePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MuchinfoPagerNavigationButton radButton = d as MuchinfoPagerNavigationButton;
            if (radButton != null)
            {
                radButton.UpdateBackgroundVisibility();
            }
        }
        private void OnHoverTimerTick(object sender, EventArgs e)
        {
            this.HoverTimerStop();
            this.OnHover();
        }
        private void HoverTimerDestroy()
        {
            if (this.hoverTimer != null)
            {
                this.hoverTimer.Stop();
                this.hoverTimer.Tick -= new EventHandler(this.OnHoverTimerTick);
                this.hoverTimer = null;
            }
        }
        private void HoverTimerStart()
        {
            if (this.HoverTimerApplyState(false))
            {
                this.hoverTimer.Start();
            }
        }
        private void HoverTimerStop()
        {
            if (this.HoverTimerApplyState(false))
            {
                this.hoverTimer.Stop();
            }
        }
        private void HoverTimerRestart()
        {
            if (this.HoverTimerApplyState(false))
            {
                this.hoverTimer.Start();
            }
        }
        private bool HoverTimerApplyState(bool applyAction)
        {
            double totalMilliseconds = this.HoverDelay.TotalMilliseconds;
            if (totalMilliseconds > 0.0)
            {
                if (this.hoverTimer == null)
                {
                    this.hoverTimer = new DispatcherTimer();
                    this.hoverTimer.Tick += new EventHandler(this.OnHoverTimerTick);
                }
                if (totalMilliseconds != this.hoverTimer.Interval.TotalMilliseconds)
                {
                    this.hoverTimer.Interval = this.HoverDelay;
                }
                if (applyAction)
                {
                    if (base.IsMouseOver)
                    {
                        this.HoverTimerStart();
                    }
                    else
                    {
                        this.HoverTimerStop();
                    }
                }
            }
            else
            {
                this.HoverTimerDestroy();
            }
            return this.hoverTimer != null;
        }
    }
}