using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Shared.Phone
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{
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/// <summary>
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/// 做成一个上下可以滑动的列表控件,有刷新功能(它会调整高度,无桌布)
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/// </summary>
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public class VerticalListRefreshControl : VerticalRefreshLayout
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{
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#region ■ 变量声明___________________________
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/// <summary>
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/// 行之间的间距
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/// </summary>
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public int rowSpace = 0;
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/// <summary>
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/// 最大高度
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/// </summary>
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private int maxHeight = -1;
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/// <summary>
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/// 一个没什么用的东西
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/// </summary>
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private FrameLayout frameBackTemp = null;
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/// <summary>
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/// 自定义的获取子控件个数
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/// </summary>
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public new int ChildrenCount
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{
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get
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{
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int count = base.ChildrenCount;
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if (frameBackTemp != null && frameBackTemp.Parent != null)
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{
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count--;
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}
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return count < 0 ? 0 : count;
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}
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}
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#endregion
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#region ■ 初始化_____________________________
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/// <summary>
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/// 做成一个上下可以滑动的列表控件,有刷新功能(它会调整高度,无桌布)
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/// </summary>
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/// <param name="i_rowSpace">行之间的间距(这个值是与行控件绑定一起使用的)</param>
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public VerticalListRefreshControl(int i_rowSpace = 0)
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{
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this.rowSpace = Application.GetRealHeight(i_rowSpace);
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this.VerticalScrollBarEnabled = false;
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#if iOS
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//自动偏移取消
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if (UIKit.UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
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{
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(this.uiView as UIKit.UIScrollView).ContentInsetAdjustmentBehavior = UIKit.UIScrollViewContentInsetAdjustmentBehavior.Never;
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}
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#endif
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}
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#endregion
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#region ■ 添加子控件_________________________
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/// <summary>
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/// 添加子控件(FrameRowControl,RowLayoutControl会改变高度)
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/// </summary>
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/// <param name="view"></param>
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public override void AddChidren(View view)
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{
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base.AddChidren(view);
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if (view is FrameRowControl || view is RowLayoutControl)
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{
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if (rowSpace > 0)
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{
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view.Height += rowSpace;
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}
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}
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if (maxHeight == -1)
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{
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maxHeight = this.Height;
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}
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}
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#endregion
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#region ■ 调整真实高度_______________________
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/// <summary>
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/// 还原高度
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/// </summary>
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public void RecoverHeight()
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{
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if (this.maxHeight != -1)
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{
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this.Height = this.maxHeight;
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#if iOS
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this.ReLocation();
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#endif
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}
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}
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/// <summary>
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/// 调整控件真实高度(只针对行控件都是相同高度的,高度只会减少,不会增加)
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/// </summary>
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/// <param name="bottomSpace">底部空白间距(真实值)</param>
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/// <param name="addSpace">当真实高度超过原有高度时,是否添加空白</param>
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public void AdjustRealHeight(int bottomSpace, bool addSpace = true)
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{
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int count = this.ChildrenCount;
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if (count <= 0)
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{
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frameBackTemp?.RemoveFromParent();
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frameBackTemp = null;
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if (maxHeight != -1)
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{
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//还原为最大高度
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this.Height = maxHeight;
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#if iOS
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this.ReLocation();
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#endif
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}
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return;
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}
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//调整列表控件的高度
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var realHeight = count * this.GetChildren(0).Height + bottomSpace;
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if (realHeight < this.Height)
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{
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frameBackTemp?.RemoveFromParent();
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frameBackTemp = null;
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//缩小控件高度
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this.Height = realHeight;
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#if iOS
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this.ReLocation();
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#endif
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}
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else if (addSpace == true && bottomSpace > 0 && realHeight > this.maxHeight)
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{
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frameBackTemp?.RemoveFromParent();
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frameBackTemp = new FrameLayout();
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frameBackTemp.Height = bottomSpace;
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this.AddChidren(frameBackTemp);
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}
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}
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/// <summary>
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/// 针对底部点击按钮,调整控件真实高度
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/// </summary>
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/// <param name="bottomSpace">底部空白间距(真实值,如果列表控件真实高度没有超过时,使用此值)</param>
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/// <param name="correctionsValue">Y轴补正值(真实值,列表控件不在bodyFramelayout的时候使用)</param>
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public void AdjustRealHeightByBottomButton(int bottomSpace, int correctionsValue = 0)
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{
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if (this.ChildrenCount == 0)
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{
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frameBackTemp?.RemoveFromParent();
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frameBackTemp = null;
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if (maxHeight != -1)
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{
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//还原为最大高度
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this.Height = maxHeight;
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#if iOS
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this.ReLocation();
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#endif
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}
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return;
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}
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var realHeight = this.ChildrenCount * this.GetChildren(0).Height + this.Y + correctionsValue;
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var btnTemp = new BottomClickButton();
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if (btnTemp.Yaxis >= realHeight)
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{
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//没有超过
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this.AdjustRealHeight(bottomSpace);
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return;
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}
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//超过时,重置至最大
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this.RecoverHeight();
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//添加临时控件,直至可以滑动超过底部按钮
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frameBackTemp?.RemoveFromParent();
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frameBackTemp = new FrameLayout();
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frameBackTemp.Height = HdlControlResourse.BodyFrameHeight - btnTemp.Yaxis + bottomSpace;
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this.AddChidren(frameBackTemp);
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}
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#endregion
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#region ■ 一般方法___________________________
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/// <summary>
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/// 控件移除
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/// </summary>
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public override void RemoveFromParent()
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{
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if (this.Parent != null)
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{
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base.RemoveFromParent();
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}
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}
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/// <summary>
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/// ☆☆移除全部控件☆☆
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/// </summary>
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public override void RemoveAll()
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{
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if (this.Parent != null)
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{
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base.RemoveAll();
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}
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}
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#endregion
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}
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}
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