using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Shared.Phone.UserCenter
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{
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/// <summary>
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/// 这是一个特殊的FrameLayout，添加子控件时，可以指定重置大小
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/// </summary>
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public class SpecialFrameLayout : FrameLayout
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{
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/// <summary>
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/// 下面的子控件的底部距离底部边界的距离
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/// </summary>
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public int bottomSpace = 0;
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/// <summary>
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/// 这是一个特殊的FrameLayout，添加子控件时，可以指定重置大小
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/// </summary>
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/// <param name="i_Width">宽度</param>
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/// <param name="i_Height">高度</param>
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/// <param name="i_bottomSpace">
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/// <para>最下面的子控件的底部距离底部边界的距离，当子控件的底部超过边界时，控件会扩大</para>
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/// <para>这是一个理论值，控件内部会计算它的真实值</para>
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/// </param>
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/// <param name="real">是否计算真实值</param>
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public SpecialFrameLayout(int i_Width, int i_Height, int i_bottomSpace, bool real = true)
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{
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this.bottomSpace = Application.GetRealHeight(i_bottomSpace);
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if (real == true)
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{
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i_Width = Application.GetRealWidth(i_Width);
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i_Height = Application.GetRealHeight(i_Height);
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}
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this.Height = i_Height;
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this.Width = i_Width;
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}
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/// <summary>
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/// 这是一个特殊的FrameLayout，添加子控件时，可以指定重置大小
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/// </summary>
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/// <param name="i_Height">高度</param>
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/// <param name="i_bottomSpace">
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/// <para>最下面的子控件的底部距离底部边界的距离，当子控件的底部超过边界时，控件会扩大</para>
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/// <para>这是一个理论值，控件内部会计算它的真实值</para>
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/// </param>
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/// <param name="real">是否计算真实值</param>
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public SpecialFrameLayout(int i_Height, int i_bottomSpace, bool real = true)
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{
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this.bottomSpace = Application.GetRealHeight(i_bottomSpace);
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if (real == true)
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{
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i_Height = Application.GetRealHeight(i_Height);
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}
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this.Height = i_Height;
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this.Width = Application.CurrentWidth;
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}
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/// <summary>
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/// 添加子控件
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/// </summary>
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/// <param name="view"></param>
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/// <param name="heightAutoMode">高度变更模式</param>
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public void AddChidren(View view, HeightAutoMode heightAutoMode = HeightAutoMode.None)
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{
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base.AddChidren(view);
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//增加当前高度
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if (heightAutoMode == HeightAutoMode.IncreaseOnly)
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{
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//根据增加模式，调整当前控件高度
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this.IncreaseHeightByMode(view);
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//重置控件的位置
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this.ResetGravity(false);
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}
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//自动调整当前高度
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else if (heightAutoMode == HeightAutoMode.AutoOnly)
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{
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//根据自动模式，调整当前控件高度
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this.AutoHeightByMode(view);
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//重置控件的位置
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this.ResetGravity(false);
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}
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//增加当前高度(含全部父容器)
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else if (heightAutoMode == HeightAutoMode.IncreaseAll)
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{
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//根据增加模式，调整当前控件高度
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this.IncreaseHeightByMode(view);
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//根据自动模式，调整全部父容器的高度
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this.IncreaseParentHeightByMode();
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//重置控件的位置
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this.ResetGravity(true);
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}
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//自动调整当前高度(含全部父容器)
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else if (heightAutoMode == HeightAutoMode.AutoAll)
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{
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//根据自动模式，调整当前控件高度
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this.AutoHeightByMode(view);
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//根据自动模式，调整全部父容器的高度
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this.AutoParentHeightByMode();
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//重置控件的位置
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this.ResetGravity(true);
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}
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}
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/// <summary>
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/// 根据增加模式，增加当前控件高度
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/// </summary>
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/// <param name="view">进行判定的子控件对象</param>
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public void IncreaseHeightByMode(View view)
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{
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if (view == null)
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{
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//获取容器下最底部的控件
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view = this.GetLastView(this);
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}
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if (view == null)
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{
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return;
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}
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//计算最小高度
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int minHeight = view.Bottom + this.bottomSpace;
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if (minHeight <= this.Height)
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{
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//不需要调整高度
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return;
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}
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//调整高度
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this.Height = minHeight;
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if (this.Gravity != Gravity.Frame)
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{
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this.Gravity = this.Gravity;
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}
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//如果父容器高度变更，则重置全部子控件的位置
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this.ResetChildrenGravity();
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}
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/// <summary>
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/// 根据增加模式，增加当前控件的父容器的高度
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/// </summary>
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public void IncreaseParentHeightByMode()
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{
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View parentView = this.Parent;
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while (parentView != null)
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{
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if ((parentView is SpecialFrameLayout) == false)
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{
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parentView = parentView.Parent;
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continue;
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}
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SpecialFrameLayout layout = (SpecialFrameLayout)parentView;
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//根据增加模式，调整当前控件高度
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layout.IncreaseHeightByMode(null);
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//下一个父容器
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parentView = parentView.Parent;
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}
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}
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/// <summary>
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/// 根据自动模式，调整当前控件高度
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/// </summary>
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/// <param name="view">进行判定的子控件对象</param>
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public void AutoHeightByMode(View view)
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{
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if (view == null)
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{
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//获取容器下最底部的控件
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view = this.GetLastView(this);
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}
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if (view == null)
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{
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return;
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}
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//计算自动高度
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int autoHeight = view.Bottom + this.bottomSpace;
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if (autoHeight == this.Height)
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{
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//不需要调整高度
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return;
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}
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//调整高度
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this.Height = autoHeight;
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//如果父容器高度变更，则重置全部子控件的位置
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this.ResetChildrenGravity();
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}
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/// <summary>
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/// 根据自动模式，调整全部父容器的高度
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/// </summary>
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public void AutoParentHeightByMode()
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{
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View parentView = this.Parent;
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while (parentView != null)
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{
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if ((parentView is SpecialFrameLayout) == false)
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{
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parentView = parentView.Parent;
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continue;
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}
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SpecialFrameLayout layout = (SpecialFrameLayout)parentView;
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//根据自动模式，调整当前控件高度
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layout.AutoHeightByMode(null);
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//下一个父容器
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parentView = parentView.Parent;
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}
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}
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/// <summary>
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/// 获取容器下最底部的控件
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/// </summary>
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/// <param name="specialFrameLayout"></param>
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/// <returns></returns>
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private View GetLastView(SpecialFrameLayout specialFrameLayout)
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{
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if (specialFrameLayout.ChildrenCount == 0)
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{
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return null;
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}
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View lastView = specialFrameLayout.GetChildren(0);
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for (int i = 1; ; i++)
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{
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View view = specialFrameLayout.GetChildren(i);
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if (view == null)
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{
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break;
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}
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if (lastView.Bottom < view.Bottom)
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{
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lastView = view;
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}
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}
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return lastView;
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}
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/// <summary>
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/// 重置全部子控件的位置
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/// </summary>
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private void ResetChildrenGravity()
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{
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for (int i = 0; ; i++)
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{
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View view = this.GetChildren(i);
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if (view == null)
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{
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break;
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}
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//重置子控件的位置
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if (view.Gravity != Gravity.Frame)
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{
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view.Gravity = view.Gravity;
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}
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}
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}
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/// <summary>
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/// 重置控件的位置
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/// </summary>
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/// <param name="resetParent">是否重置全部父容器</param>
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private void ResetGravity(bool resetParent)
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{
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//重置控件的位置
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if (this.Gravity != Gravity.Frame)
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{
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this.Gravity = this.Gravity;
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}
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if (resetParent == false)
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{
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return;
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}
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View parentView = this.Parent;
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while (parentView != null)
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{
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if ((parentView is SpecialFrameLayout) == false)
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{
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parentView = parentView.Parent;
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continue;
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}
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//重置控件的位置
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if (parentView.Gravity != Gravity.Frame)
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{
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parentView.Gravity = parentView.Gravity;
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}
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//下一个父容器
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parentView = parentView.Parent;
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}
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}
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}
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}
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