using System;
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using Android.Content;
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using Android.Views;
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using Android.Views.Animations;
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namespace Shared
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{
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public class SwipeLayout:ViewGroup
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{
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AndroidSwipeLayout androidSwipeLayout;
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uint lineColor = 0x62818181;
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/// <summary>
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/// 背景颜色
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/// </summary>
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/// <value>The color of the background.</value>
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public virtual uint LineColor
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{
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get
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{
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return lineColor;
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}
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set
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{
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lineColor = value;
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byte a, r, g, b;
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a = (byte)(lineColor / 256 / 256 / 256 % 256);
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r = (byte)(lineColor / 256 / 256 % 256);
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g = (byte)(lineColor / 256 % 256);
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b = (byte)(lineColor % 256);
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lineLinearLayout.SetBackgroundColor(Android.Graphics.Color.Argb(a, r, g, b));
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}
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}
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/// <summary>
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/// 宽度设置或读取
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/// </summary>
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/// <value>The width.</value>
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public override int Width
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{
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get
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{
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return base.Width;
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}
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set
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{
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base.Width = value;
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if (!IsCanRefresh)
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{
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return;
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}
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var layoutParameters = androidSwipeLayout.LayoutParameters;
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layoutParameters.Width = Width;
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androidSwipeLayout.LayoutParameters = layoutParameters;
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}
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}
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/// <summary>
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/// 视图高度
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/// </summary>
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/// <value>The height.</value>
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public override int Height
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{
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get
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{
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return base.Height;
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}
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set
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{
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base.Height = value;
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if (!IsCanRefresh)
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{
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return;
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}
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var layoutParameters = androidSwipeLayout.LayoutParameters;
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layoutParameters.Height = Height;
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androidSwipeLayout.LayoutParameters = layoutParameters;
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}
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}
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Android.Widget.LinearLayout leftLinarLayout;
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Android.Widget.LinearLayout rightLinarLayout;
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Android.Widget.LinearLayout lineLinearLayout;
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/// <summary>
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/// 在滑动事件下，可显示隐藏些自定义视图
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/// </summary>
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public SwipeLayout()
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{
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viewGroup = new Android.Widget.FrameLayout(Application.Activity);
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androidSwipeLayout = new AndroidSwipeLayout(Application.Activity, this);
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realViewGroup = androidSwipeLayout;
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leftLinarLayout = new Android.Widget.LinearLayout(Application.Activity) { Orientation = Android.Widget.Orientation.Horizontal, Alpha = 0.0f };
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rightLinarLayout = new Android.Widget.LinearLayout(Application.Activity) { Orientation = Android.Widget.Orientation.Horizontal, Alpha = 0.0f };
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lineLinearLayout = new Android.Widget.LinearLayout(Application.Activity);
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LineColor = lineColor;
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viewGroup.AddView(leftLinarLayout, new Android.Views.ViewGroup.LayoutParams(Android.Views.ViewGroup.LayoutParams.WrapContent, Android.Views.ViewGroup.LayoutParams.MatchParent));
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viewGroup.AddView(rightLinarLayout, new Android.Views.ViewGroup.LayoutParams(Android.Views.ViewGroup.LayoutParams.WrapContent, Android.Views.ViewGroup.LayoutParams.MatchParent));
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viewGroup.AddView(androidSwipeLayout, new Android.Views.ViewGroup.LayoutParams(Android.Views.ViewGroup.LayoutParams.MatchParent, Android.Views.ViewGroup.LayoutParams.MatchParent));
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viewGroup.AddView(lineLinearLayout, new Android.Widget.FrameLayout.LayoutParams(Android.Views.ViewGroup.LayoutParams.MatchParent, DensityUtil.Dip2Px(1), Android.Views.GravityFlags.Bottom));
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}
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void openLeftMenu()
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{
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hideRightMenu();
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if (leftLinarLayout.ChildCount == 0)
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return;
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Android.Widget.FrameLayout.LayoutParams lp = (Android.Widget.FrameLayout.LayoutParams)androidSwipeLayout.LayoutParameters;
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lp.LeftMargin = leftLinarLayout.LayoutParameters.Width;
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androidSwipeLayout.LayoutParameters = lp;
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leftLinarLayout.Alpha = 1.0f;
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leftLinarLayout.ClearAnimation();
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leftLinarLayout.Animation = new TranslateAnimation(
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Dimension.RelativeToSelf, 0.1f,
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Dimension.RelativeToSelf, 0,
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Dimension.RelativeToSelf, 0,
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Dimension.RelativeToSelf, 0);
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leftLinarLayout.Animation.Duration = 200;
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leftLinarLayout.Animation.StartNow();
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}
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void hideLeftMenu()
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{
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Android.Widget.FrameLayout.LayoutParams lp = (Android.Widget.FrameLayout.LayoutParams)androidSwipeLayout.LayoutParameters;
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lp.LeftMargin = 0;
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androidSwipeLayout.LayoutParameters = lp;
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leftLinarLayout.Alpha = 0.0f;
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}
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void openRightMenu()
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{
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hideLeftMenu();
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if (rightLinarLayout.ChildCount == 0)
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return;
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Android.Widget.FrameLayout.LayoutParams lp = (Android.Widget.FrameLayout.LayoutParams)androidSwipeLayout.LayoutParameters;
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lp.LeftMargin = -rightLinarLayout.LayoutParameters.Width;
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androidSwipeLayout.LayoutParameters = lp;
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rightLinarLayout.Alpha = 1.0f;
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if (rightLinarLayout.Animation == null)
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{
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rightLinarLayout.Animation = new TranslateAnimation(
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Dimension.RelativeToSelf, -0.1f,
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Dimension.RelativeToSelf, 0.0f,
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Dimension.RelativeToSelf, 0,
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Dimension.RelativeToSelf, 0);
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rightLinarLayout.Animation.Duration = 200;
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}
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rightLinarLayout.Animation.Reset();
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rightLinarLayout.Animation.StartNow();
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}
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void hideRightMenu()
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{
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Android.Widget.FrameLayout.LayoutParams lp = (Android.Widget.FrameLayout.LayoutParams)androidSwipeLayout.LayoutParameters;
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lp.LeftMargin = 0;
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androidSwipeLayout.LayoutParameters = lp;
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rightLinarLayout.Alpha = 0.0f;
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}
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/// <summary>
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/// 子视图的宽度
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/// </summary>
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int subViewWidth = 100;
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/// <summary>
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/// 增加左边视图
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/// </summary>
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/// <param name="view">View.</param>
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public void AddLeftView(View view)
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{
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leftLinarLayout.AddView(view.AndroidView, new Android.Views.ViewGroup.LayoutParams(DensityUtil.Dip2Px(subViewWidth), androidSwipeLayout.LayoutParameters.Height));
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leftLinarLayout.LayoutParameters.Width = leftLinarLayout.ChildCount * DensityUtil.Dip2Px(subViewWidth);
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view.Parent = this;
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view.Width = DensityUtil.Dip2Px(subViewWidth);
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view.Height = androidSwipeLayout.LayoutParameters.Height;
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}
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/// <summary>
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/// 增加右边视图
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/// </summary>
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/// <param name="view">View.</param>
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public void AddRightView(View view)
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{
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rightLinarLayout.AddView(view.AndroidView, new Android.Views.ViewGroup.LayoutParams(DensityUtil.Dip2Px(subViewWidth), androidSwipeLayout.LayoutParameters.Height));
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rightLinarLayout.LayoutParameters.Width = rightLinarLayout.ChildCount * DensityUtil.Dip2Px(subViewWidth);
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((Android.Widget.FrameLayout.LayoutParams)rightLinarLayout.LayoutParameters).LeftMargin = androidSwipeLayout.LayoutParameters.Width - rightLinarLayout.LayoutParameters.Width;
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view.Parent = this;
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view.Width = DensityUtil.Dip2Px(subViewWidth);
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view.Height = androidSwipeLayout.LayoutParameters.Height;
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}
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internal class AndroidSwipeLayout : Android.Widget.FrameLayout, GestureDetector.IOnGestureListener
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{
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/// <summary>
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/// 左右滑动的最短距离
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/// </summary>
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int distance = 100;
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/// <summary>
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/// 左右滑动的最小速度
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/// </summary>
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int velocity = 200;
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bool isFling;
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/// <summary>
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/// 手势对象
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/// </summary>
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GestureDetector mGesture;
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SwipeLayout swipeLayout;
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public AndroidSwipeLayout(Context context, SwipeLayout swipeLayout)
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: base(context)
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{
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this.swipeLayout = swipeLayout;
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mGesture = new GestureDetector(context, this);
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}
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public override bool OnTouchEvent(MotionEvent e)
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{
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if (Shared.AndroidView.IsLive(this) && !isFling)
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swipeLayout.TouchEvent(e);
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return true;
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}
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public override bool OnInterceptTouchEvent(MotionEvent ev)
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{
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if (!Shared.AndroidView.IsLive(this))
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{
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return false;
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}
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mGesture.OnTouchEvent(ev);
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//如果是滑动，就拦截事件，后面的事件是由自己的TouchEvent处理，子控件会收到取消事件，如果是快速滑动，事件也是自己处理
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if (isFling)
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{
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return true;
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}
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//如果是滑动这里也会返回True
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return base.OnInterceptTouchEvent(ev);
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}
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/// <summary>
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/// 设置所有父视图禁止拦截事件
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/// </summary>
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/// <param name="b">如果设置True表示不要拦截，如果设置为False表示可以拦截</param>
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void requestParentDisallowInterceptTouchEvent(bool b)
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{
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var tempParent = Parent;
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while (tempParent != null)
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{ //告诉父类不要拦截这个视图的事件
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tempParent.RequestDisallowInterceptTouchEvent(b);
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tempParent = tempParent.Parent;
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}
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}
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public bool OnDown(MotionEvent e)
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{
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isFling = false;
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return false;
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}
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public bool OnFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
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{
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// e1：第1个ACTION_DOWN MotionEvent
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// e2：最后一个ACTION_MOVE MotionEvent
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// velocityX：X轴上的移动速度（像素/秒）
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// velocityY：Y轴上的移动速度（像素/秒）
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// 向左滑
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if (e1.GetX() - e2.GetX() > distance
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&& Math.Abs(velocityX) > velocity)
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{
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isFling = true;
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swipeLayout.openRightMenu();
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}
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// 向右滑
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if (e2.GetX() - e1.GetX() > distance
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&& Math.Abs(velocityX) > velocity)
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{
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isFling = true;
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swipeLayout.openLeftMenu();
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}
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//迅速滑动，并松开
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return false;
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}
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public void OnLongPress(MotionEvent e)
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{
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Shared.HDLUtils.WriteLine("OnLongPress:长按不放");
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}
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public bool OnScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)
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{
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Shared.HDLUtils.WriteLine("OnScroll:在屏幕上滑动");
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return false;
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}
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public void OnShowPress(MotionEvent e)
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{
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Shared.HDLUtils.WriteLine("OnShowPress:手指按下一段时间，还没到长按");
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}
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public bool OnSingleTapUp(MotionEvent e)
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{
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if(!isFling){
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swipeLayout.hideLeftMenu();
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swipeLayout.hideRightMenu();
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}
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Shared.HDLUtils.WriteLine("OnSingleTapUp:手指弹起");
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return false;
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}
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}
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}
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}
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