using System;
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using UIKit;
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using System.IO;
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using Foundation;
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using CoreGraphics;
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using Shared.IO;
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namespace Shared
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{
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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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/// 滑块
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/// </summary>
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UIButton btnThum = new UIButton(new CGRect(0, 0, 24, 24)) { Enabled = false };
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/// <summary>
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/// 进度条颜色
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/// </summary>
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UIButton btnProgressColor = new UIButton(new CGRect(0, 0, 1, 0)) { Enabled = false };
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/// <summary>
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/// 背景进度条颜色
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/// </summary>
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UIButton btnBackgroundColor = new UIButton(new CGRect(0, 0, 1, 0)) { Enabled = false };
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MyVerticalSeekBar currentRealView;
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/// <summary>
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/// 构造函数
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/// </summary>
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public VerticalSeekBar()
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{
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currentRealView = new MyVerticalSeekBar(this) { };
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uiView = currentRealView;
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uiView.AddSubview(btnBackgroundColor);
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uiView.AddSubview(btnProgressColor);
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uiView.AddSubview(btnThum);
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}
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/// <summary>
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/// 生成圆形的滑动
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/// </summary>
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/// <returns>The image with color.</returns>
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/// <param name="color">Color.</param>
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UIImage createImageWithColor(UIColor color)
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{
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//设置长宽
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CGRect rect = new CGRect(0.0f, 0.0f, btnThum.Frame.Width, btnThum.Frame.Width);
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UIGraphics.BeginImageContext(rect.Size);
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var context = UIGraphics.GetCurrentContext();
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context.SetFillColor(color.CGColor);
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context.FillRect(rect);
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UIImage resultImage = UIGraphics.GetImageFromCurrentImageContext();
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UIGraphics.EndImageContext();
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// 开始一个Image的上下文
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UIGraphics.BeginImageContextWithOptions(resultImage.Size, false, 0.0f);
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// 添加圆角
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UIBezierPath.FromRoundedRect(rect, btnThum.Frame.Width / 2).AddClip();
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// 绘制图片
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resultImage.Draw(rect);
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// 接受绘制成功的图片
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resultImage = UIGraphics.GetImageFromCurrentImageContext();
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UIGraphics.EndImageContext();
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return resultImage;
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}
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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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/// 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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if (!IsCanRefresh)
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{
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return;
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}
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var frameBackgroundColor = btnBackgroundColor.Frame;
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frameBackgroundColor.Height = base.Height;
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btnBackgroundColor.Frame = frameBackgroundColor;
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}
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}
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/// <summary>
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/// 当前视图的宽度
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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 frameBtnFrame = btnThum.Frame;
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frameBtnFrame.X = (base.Width - btnThum.Frame.Width) / 2;
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btnThum.Frame = frameBtnFrame;
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var frameBackgroundColor = btnBackgroundColor.Frame;
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frameBackgroundColor.X = (base.Width - frameBackgroundColor.Width) / 2;
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btnBackgroundColor.Frame = frameBackgroundColor;
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var frameProgressColor = btnProgressColor.Frame;
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frameProgressColor.X = (base.Width - frameProgressColor.Width) / 2;
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btnProgressColor.Frame = frameProgressColor;
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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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nfloat validHeight
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{
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get {
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return uiView.Frame.Height - btnThum.Frame.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.Frame.Y) / 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.Frame;
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frameThum.Y = 1.0f*(Max - progress) / Max * validHeight;
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btnThum.Frame = frameThum;
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var frameProgress = btnProgressColor.Frame;
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frameProgress.Y = frameThum.Y + frameThum.Height / 2;
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frameProgress.Height = uiView.Frame.Height - frameProgress.Y;
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btnProgressColor.Frame = frameProgress;
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}
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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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int r = (byte)(progressColor / 256 / 256 % 256);
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int g = (byte)(progressColor / 256 % 256);
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int b = (byte)(progressColor % 256);
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int a = (byte)(progressColor / 256 / 256 / 256 % 256);
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btnProgressColor.BackgroundColor = UIKit.UIColor.FromRGBA(r, g, b, a);
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}
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}
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uint backgroundColor = 0xFFFFFFFF;
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/// <summary>
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/// 底部颜色
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/// </summary>
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/// <value>The color of the background.</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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int r = (byte)(backgroundColor / 256 / 256 % 256);
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int g = (byte)(backgroundColor / 256 % 256);
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int b = (byte)(backgroundColor % 256);
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int a = (byte)(backgroundColor / 256 / 256 / 256 % 256);
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btnBackgroundColor.BackgroundColor = UIKit.UIColor.FromRGBA(r, g, b, a);
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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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if (!IsCanRefresh)
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{
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return;
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}
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int r = (byte)(thumbColor / 256 / 256 % 256);
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int g = (byte)(thumbColor / 256 % 256);
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int b = (byte)(thumbColor % 256);
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int a = (byte)(thumbColor / 256 / 256 / 256 % 256);
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btnThum.SetBackgroundImage(createImageWithColor(UIColor.FromRGBA(r, g, b, a)), UIControlState.Disabled);
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}
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}
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internal override bool TouchEvent(EventActions e, CGPoint point)
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{
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switch (e)
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{
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case EventActions.Down:
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dateTime = DateTime.Now;
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setButtonLoaction(point.Y);
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break;
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case EventActions.Move:
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setButtonLoaction(point.Y);
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break;
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case EventActions.Cancel:
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case EventActions.Up:
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dateTime = DateTime.MinValue;
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setButtonLoaction(point.Y);
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break;
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}
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return base.TouchEvent(e,point);
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}
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int beforValue = 0;
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void setButtonLoaction(nfloat 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.Frame;
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frameThum.Y = y;
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btnThum.Frame = frameThum;
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var frameProgress = btnProgressColor.Frame;
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frameProgress.Y = frameThum.Y + frameThum.Height / 2;
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frameProgress.Height = uiView.Frame.Height - frameProgress.Y;
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btnProgressColor.Frame = 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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class MyVerticalSeekBar : UIView
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{
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[Weak] VerticalSeekBar view;
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public MyVerticalSeekBar(VerticalSeekBar view) {
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this.view = view;
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}
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public override UIView HitTest(CGPoint point, UIEvent uievent)
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{
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//如果点击是这个区域，不让其它视图执行事件
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if (PointInside(point, uievent))
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{
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return this;
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}
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return null;
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}
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nfloat startPointX;
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/// <summary>
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/// 点击开始
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/// </summary>
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/// <param name="touches">Touches.</param>
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/// <param name="evt">Evt.</param>
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public override void TouchesBegan(NSSet touches, UIEvent evt)
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{
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parentScrolled(false);
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var cgpoint = (touches.AnyObject as UITouch).LocationInView(this);
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startPointX = cgpoint.X;
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view?.TouchEvent(EventActions.Down, (touches.AnyObject as UITouch).LocationInView(this));
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}
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/// <summary>
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/// 移动
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/// </summary>
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/// <param name="touches">Touches.</param>
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/// <param name="evt">Evt.</param>
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public override void TouchesMoved(NSSet touches, UIEvent evt)
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{
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var cgpoint = (touches.AnyObject as UITouch).LocationInView(this);
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if (20 < Math.Abs(cgpoint.X - startPointX))
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{
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parentScrolled(true);
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}
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view?.TouchEvent(EventActions.Move, (touches.AnyObject as UITouch).LocationInView(this));
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}
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/// <summary>
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/// 点击弹起
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/// </summary>
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/// <param name="touches">Touches.</param>
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/// <param name="evt">Evt.</param>
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public override void TouchesEnded(NSSet touches, UIEvent evt)
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{
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parentScrolled(true);
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view?.TouchEvent(EventActions.Up, (touches.AnyObject as UITouch).LocationInView(this));
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}
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public override void TouchesCancelled(NSSet touches, UIEvent evt)
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{
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parentScrolled(true);
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view?.TouchEvent(EventActions.Cancel, (touches.AnyObject as UITouch).LocationInView(this));
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}
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/// <summary>
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/// 设置父视图是否可以滑动
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/// </summary>
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/// <param name="b">If set to <c>true</c> b.</param>
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void parentScrolled(bool b)
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{
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var tempParent = Superview;
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while (null != tempParent)
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{
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if (tempParent.GetType() == typeof(UIScrollView))
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{
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(tempParent as UIScrollView).ScrollEnabled = b;
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}
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tempParent = tempParent.Superview;
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}
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}
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}
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}
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}
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