using System;
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using Android.Widget;
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using Android.Content;
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using Android.Graphics;
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using Android.Views;
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using Android.Util;
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using Android.Runtime;
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namespace Shared
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{
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//已经全面检查了代码
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/// <summary>
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/// 位置布局
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/// </summary>
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public class VerticalSeekBar : View
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{
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/// <summary>
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/// 当前视图
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/// </summary>
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/// <value>The android horizonetal seek bar.</value>
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VerticalSeekBarAndroidFrameLayout verticalSeekBarAndroidFrameLayout
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{
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get
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{
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return AndroidView as VerticalSeekBarAndroidFrameLayout;
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}
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set
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{
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AndroidView = value;
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}
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}
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Android.Widget.ImageView btnBackgroundColor;
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/// <summary>
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/// 显示进度控件
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/// </summary>
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Android.Widget.ImageView btnProgressColor;
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/// <summary>
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/// 滑块
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/// </summary>
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Android.Widget.ImageView btnThum;
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/// <summary>
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/// 当前实例
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/// </summary>
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public VerticalSeekBar()
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{
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verticalSeekBarAndroidFrameLayout = new VerticalSeekBarAndroidFrameLayout(Application.Activity, this);
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btnBackgroundColor = new Android.Widget.ImageView(Application.Activity);
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verticalSeekBarAndroidFrameLayout.AddView(btnBackgroundColor, new Android.Widget.FrameLayout.LayoutParams(DensityUtil.Dip2Px(1), 0, GravityFlags.CenterHorizontal));
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btnProgressColor = new Android.Widget.ImageView(Application.Activity);
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verticalSeekBarAndroidFrameLayout.AddView(btnProgressColor, new Android.Widget.FrameLayout.LayoutParams(DensityUtil.Dip2Px(1), 0, GravityFlags.CenterHorizontal));
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btnThum = new Android.Widget.ImageView(Application.Activity);
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verticalSeekBarAndroidFrameLayout.AddView(btnThum, new Android.Widget.FrameLayout.LayoutParams(DensityUtil.Dip2Px(24), DensityUtil.Dip2Px(24), GravityFlags.CenterHorizontal));
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}
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internal override bool TouchEvent(MotionEvent e)
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{
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switch (e.Action)
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{
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case MotionEventActions.Down:
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dateTime = DateTime.Now;
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setButtonLoaction((int)e.GetY());
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break;
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case MotionEventActions.Move:
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setButtonLoaction((int)e.GetY());
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break;
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case MotionEventActions.Cancel:
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case MotionEventActions.Up:
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dateTime = DateTime.MinValue;
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setButtonLoaction((int)e.GetY());
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break;
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}
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return base.TouchEvent(e);
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}
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/// <summary>
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/// 当前视图的高度
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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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var frameBackgroundColor = btnBackgroundColor.LayoutParameters as Android.Widget.FrameLayout.LayoutParams;
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frameBackgroundColor.Height = base.Height;
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btnBackgroundColor.LayoutParameters = frameBackgroundColor;
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}
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}
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DateTime dateTime;
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/// <summary>
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/// 进度变化事件
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/// </summary>
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public Action<View, int> ProgressChanged;
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int max = 100;
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/// <summary>
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/// 最大值
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/// </summary>
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/// <value>The max.</value>
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public int Max
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{
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get
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{
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return max;
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}
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set
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{
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max = value;
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}
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}
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bool isCanScrolled = true;
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/// <summary>
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/// 是否允许滑动滑块
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/// </summary>
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/// <value><c>true</c> if is can scrolled; otherwise, <c>false</c>.</value>
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public bool IsCanScrolled
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{
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get
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{
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return isCanScrolled;
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}
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set
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{
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isCanScrolled = value;
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}
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}
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int validHeight
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{
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get
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{
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return AndroidView.Height - btnThum.Height;
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}
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}
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//2019-08-29 改100毫秒
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public int DelayTime = 100;
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//防止跳动，延时显示状态
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DateTime delayDateTime = DateTime.MinValue;
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int progress;
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/// <summary>
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/// 当前进度
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/// </summary>
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/// <value>The progress.</value>
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public int Progress
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{
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get
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{
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return (int)(Max * (validHeight - btnThum.Top) / validHeight);
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}
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set
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{
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progress = value;
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if (!IsCanRefresh)
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{
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return;
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}
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//发送命令后3000毫秒内不更新状态，防止跳动
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if ((DateTime.Now - delayDateTime).TotalMilliseconds < DelayTime)
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{
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return;
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}
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if (Max < progress)
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{
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progress = Max;
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}
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var frameThum = btnThum.LayoutParameters as Android.Widget.FrameLayout.LayoutParams;
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frameThum.TopMargin = (int)(1.0f * (Max - progress) / Max * validHeight);
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btnThum.LayoutParameters = frameThum;
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var frameProgress = btnProgressColor.LayoutParameters as Android.Widget.FrameLayout.LayoutParams;
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frameProgress.TopMargin = frameThum.TopMargin + frameThum.Height / 2;
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frameProgress.Height = AndroidView.LayoutParameters.Height - frameProgress.TopMargin;
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btnProgressColor.LayoutParameters = frameProgress;
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}
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}
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/// <summary>
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/// 刷新当前对象
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/// </summary>
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public override void Refresh()
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{
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base.Refresh();
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ProgressColor = progressColor;
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BackgroundColor = BackgroundColor;
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ThumbColor = thumbColor;
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Progress = progress;
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}
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/// <summary>
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/// 滑动休眠时间
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/// </summary>
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public int SleepTime = 0;
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uint progressColor = 0x99000099;
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/// <summary>
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/// 进度视图颜色
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/// </summary>
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/// <value>The color of the progress.</value>
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public uint ProgressColor
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{
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get
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{
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return progressColor;
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}
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set
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{
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progressColor = value;
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if (!IsCanRefresh)
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{
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return;
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}
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byte r, g, b, a;
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r = (byte)(progressColor / 256 / 256 % 256);
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g = (byte)(progressColor / 256 % 256);
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b = (byte)(progressColor % 256);
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a = (byte)(progressColor / 256 / 256 / 256 % 256);
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btnProgressColor.SetBackgroundColor(Android.Graphics.Color.Argb(a, r, g, b));
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}
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}
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uint backgroundColor=0xFFFFFFFF;
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/// <summary>
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/// 进度视图颜色
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/// </summary>
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/// <value>The color of the progress.</value>
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public new uint BackgroundColor
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{
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get
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{
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return backgroundColor;
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}
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set
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{
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backgroundColor = value;
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if (!IsCanRefresh)
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{
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return;
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}
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byte r, g, b, a;
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r = (byte)(backgroundColor / 256 / 256 % 256);
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g = (byte)(backgroundColor / 256 % 256);
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b = (byte)(backgroundColor % 256);
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a = (byte)(backgroundColor / 256 / 256 / 256 % 256);
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btnBackgroundColor.SetBackgroundColor(Android.Graphics.Color.Argb(a, r, g, b));
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}
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}
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uint thumbColor = 0xFFFFFFFF;
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/// <summary>
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/// 滑块颜色
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/// </summary>
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/// <value>The color of the background.</value>
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public uint ThumbColor
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{
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get
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{
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return thumbColor;
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}
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set
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{
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thumbColor = value;
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var gradientDrawable = new Android.Graphics.Drawables.GradientDrawable();
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gradientDrawable.SetCornerRadius(DensityUtil.Dip2Px(12));
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byte r, g, b, a;
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r = (byte)(thumbColor / 256 / 256 % 256);
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g = (byte)(thumbColor / 256 % 256);
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b = (byte)(thumbColor % 256);
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a = (byte)(thumbColor / 256 / 256 / 256 % 256);
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gradientDrawable.SetColor(Android.Graphics.Color.Argb(a, r, g, b).ToArgb());
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btnThum.Background = gradientDrawable;
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}
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}
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int beforValue = 0;
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//将图片移动到点击的位置
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void setButtonLoaction(int y)
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{
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if (!IsCanScrolled)
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{
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return;
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}
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delayDateTime = DateTime.Now;
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if (y < 0)
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{
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y = 0;
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}
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if (validHeight < y)
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{
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y = validHeight;
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}
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var frameThum = btnThum.LayoutParameters as Android.Widget.FrameLayout.LayoutParams;
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frameThum.TopMargin = y;
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btnThum.LayoutParameters = frameThum;
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var frameProgress = btnProgressColor.LayoutParameters as Android.Widget.FrameLayout.LayoutParams;
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frameProgress.TopMargin = frameThum.TopMargin + frameThum.Height / 2;
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frameProgress.Height = AndroidView.LayoutParameters.Height - frameProgress.TopMargin;
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btnProgressColor.LayoutParameters = frameProgress;
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if (dateTime == DateTime.MinValue)
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{
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if (ProgressChanged != null && beforValue != Progress)
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{
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dateTime = DateTime.Now;
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delayDateTime = DateTime.Now;
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ProgressChanged(this, beforValue = Progress);
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}
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}
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else
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{
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//变化大于500毫秒的时候才通知
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if (SleepTime < (DateTime.Now - dateTime).TotalMilliseconds)
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{
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dateTime = DateTime.Now;
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delayDateTime = DateTime.Now;
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if (ProgressChanged != null && beforValue != Progress)
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{
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ProgressChanged(this, beforValue = Progress);
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}
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}
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}
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}
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/// <summary>
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/// 需要重写的视图
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/// </summary>
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class VerticalSeekBarAndroidFrameLayout : Android.Widget.FrameLayout
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{
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View _view;
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public VerticalSeekBarAndroidFrameLayout(Context context, View view)
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: base(context)
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{
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_view = view;
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Touch += (sender, e) =>
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{
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if (_view != null)
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{
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_view.TouchEvent(e.Event);
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}
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};
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}
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/// <summary>
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/// 所有事件本视图全部消化，不通知给子视图
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/// </summary>
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/// <returns><c>true</c>事件已经处理<c>false</c>需要父视图处理</returns>
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/// <param name="ev">Ev.</param>
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public override bool OnInterceptTouchEvent(MotionEvent ev)
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{
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//不需要子视图处理事件，所有的事件自己处理
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return true;
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}
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float startPointX;
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/// <summary>
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/// 执行OnInterceptTouchEvent和OnTouchEvent
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/// </summary>
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/// <returns><c>true</c>事件已经处理<c>false</c>事件没有处理</returns>
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/// <param name="e">E.</param>
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public override bool DispatchTouchEvent(MotionEvent e)
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{
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switch (e.Action)
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{
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case MotionEventActions.Down:
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startPointX = e.RawX;
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requestParentDisallowInterceptTouchEvent(true);
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break;
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case MotionEventActions.Move:
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if (20 < Math.Abs(e.RawX - startPointX))
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{
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requestParentDisallowInterceptTouchEvent(false);
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}
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break;
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case MotionEventActions.Up:
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case MotionEventActions.Cancel:
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requestParentDisallowInterceptTouchEvent(false);
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break;
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}
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return base.DispatchTouchEvent(e);
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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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}
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}
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}
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