namespace Yw.WinFrmUI
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{
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/// <summary>
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/// 步骤管理器
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/// </summary>
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public class WizardManager<T> : IWizardManager<T> where T : class, new()
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{
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/// <summary>
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///
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/// </summary>
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public WizardManager(T t)
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{
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_vm = t;
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}
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#region 事件
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/// <summary>
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/// 选择页面改变事件
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/// </summary>
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public event Action<IWizardPage<T>, int> SelectedPageChangedEvent;
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/// <summary>
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/// 选择页面状态改变事件
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/// </summary>
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public event Action<IWizardPage<T>, int> SelectedPageStateChangedEvent;
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#endregion
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#region 初始化
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/// <summary>
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/// 初始化管理器
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/// </summary>
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/// <param name="pages">步骤页面数组</param>
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public virtual void InitialManager(IWizardPage<T>[] pages)
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{
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_pages = pages;
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if (_pages != null && _pages.Length > 0)
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{
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_isInitialize = true;
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foreach (var page in _pages)
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{
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page.PageStateChangedEvent += () =>
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{
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if (page == this.SelectedPage)
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{
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TriggerSelectedPageStateChangedEvent();
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}
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};
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}
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_selectedIndex = 0;
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this.SelectedPage.InitialPage(_vm);
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TriggerSelectedPageChangedEvent();
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}
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else
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{
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_isInitialize = false;
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}
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}
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/// <summary>
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/// 步骤页面数组
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/// </summary>
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protected IWizardPage<T>[] _pages;
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/// <summary>
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/// 是否初始化
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/// </summary>
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protected bool _isInitialize = false;
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/// <summary>
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/// vm对象
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/// </summary>
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protected readonly T _vm = null;
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#endregion
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#region 选择
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/// <summary>
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/// 选择页面
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/// </summary>
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public virtual IWizardPage<T> SelectedPage
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{
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get
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{
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if (_isInitialize)
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{
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return _pages[this.SelectedIndex];
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}
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return default;
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}
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}
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/// <summary>
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/// 选择索引
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/// </summary>
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public virtual int SelectedIndex
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{
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get { return _selectedIndex; }
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}
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/// <summary>
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/// 选择索引
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/// </summary>
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protected int _selectedIndex;
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#endregion
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#region 操作
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/// <summary>
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/// 上一步
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/// </summary>
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public virtual bool Prev()
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{
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if (!_isInitialize)
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{
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return false;
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}
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if (!this.SelectedPage.AllowPrev)
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{
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return false;
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}
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if (this.SelectedPage.CanPrev())
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{
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--_selectedIndex;
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this.SelectedPage.InitialPage(_vm);
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TriggerSelectedPageChangedEvent();
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return true;
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}
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return false;
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}
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/// <summary>
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/// 下一步
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/// </summary>
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public virtual bool Next()
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{
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if (!_isInitialize)
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{
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return false;
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}
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if (!this.SelectedPage.AllowNext)
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{
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return false;
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}
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if (this.SelectedPage.CanNext())
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{
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++_selectedIndex;
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this.SelectedPage.InitialPage(_vm);
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TriggerSelectedPageChangedEvent();
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return true;
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}
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return false;
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}
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/// <summary>
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/// 取消
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/// </summary>
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public virtual bool Cancel()
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{
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if (!_isInitialize)
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{
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return false;
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}
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if (!this.SelectedPage.AllowCancel)
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{
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return false;
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}
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if (this.SelectedPage.CanCancel())
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{
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return true;
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}
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return false;
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}
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/// <summary>
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/// 完成
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/// </summary>
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public virtual bool Complete()
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{
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if (!_isInitialize)
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{
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return false;
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}
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if (!this.SelectedPage.AllowComplete)
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{
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return false;
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}
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if (this.SelectedPage.CanComplete())
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{
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return true;
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}
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return false;
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}
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#endregion
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#region 方法
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/// <summary>
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/// 触发选择页面改变事件
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/// </summary>
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protected void TriggerSelectedPageChangedEvent()
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{
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this.SelectedPageChangedEvent?.Invoke(this.SelectedPage, this.SelectedIndex);
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}
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/// <summary>
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/// 触发选择页面状态改变事件
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/// </summary>
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protected void TriggerSelectedPageStateChangedEvent()
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{
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this.SelectedPageStateChangedEvent?.Invoke(this.SelectedPage, this.SelectedIndex);
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}
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#endregion
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}
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}
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