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@ -0,0 +1,455 @@
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using System.ComponentModel;
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using System.Windows;
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namespace DownKyi.CustomControl
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{
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public class CustomPagerViewModel : INotifyPropertyChanged
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{
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public CustomPagerViewModel(int current, int count)
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{
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Current = current;
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Count = count;
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SetView();
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}
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public event PropertyChangedEventHandler PropertyChanged;
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// Current修改的回调
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public delegate void CurrentChangedHandler(int current);
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public event CurrentChangedHandler CurrentChanged;
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protected virtual void OnCurrentChanged(int current)
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{
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CurrentChanged?.Invoke(current);
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}
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// Count修改的回调
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public delegate void CountChangedHandler(int count);
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public event CountChangedHandler CountChanged;
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protected virtual void OnCountChanged(int count)
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{
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CountChanged?.Invoke(count);
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}
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#region 绑定属性
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private Visibility visibility;
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public Visibility Visibility
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{
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get { return visibility; }
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set
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{
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visibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Visibility"));
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}
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}
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private int count;
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public int Count
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{
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get
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{
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return count;
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}
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set
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{
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if (value < Current || value < 1)
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{
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//throw new Exception("数值不在允许的范围内。");
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System.Console.WriteLine(value.ToString());
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}
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else
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{
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count = value;
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if (count == 1) { Visibility = Visibility.Hidden; }
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else { Visibility = Visibility.Visible; }
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//SetView();
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OnCountChanged(count);
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Count"));
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}
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}
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}
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private int current;
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public int Current
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{
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get
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{
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if (current < 1) { current = 1; }
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return current;
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}
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set
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{
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if (Count > 0 && (value > Count || value < 1))
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{
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//throw new Exception("数值不在允许的范围内。");
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}
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else
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{
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current = value;
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//SetView();
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OnCurrentChanged(current);
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Current"));
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}
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}
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}
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private int first;
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public int First
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{
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get { return first; }
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set
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{
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first = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("First"));
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}
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}
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private int previousSecond;
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public int PreviousSecond
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{
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get { return previousSecond; }
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set
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{
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previousSecond = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("PreviousSecond"));
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}
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}
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private int previousFirst;
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public int PreviousFirst
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{
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get { return previousFirst; }
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set
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{
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previousFirst = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("PreviousFirst"));
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}
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}
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private int nextFirst;
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public int NextFirst
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{
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get { return nextFirst; }
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set
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{
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nextFirst = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("NextFirst"));
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}
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}
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private int nextSecond;
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public int NextSecond
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{
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get { return nextSecond; }
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set
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{
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nextSecond = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("NextSecond"));
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}
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}
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// 控制Current左边的控件
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private Visibility previousVisibility;
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public Visibility PreviousVisibility
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{
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get { return previousVisibility; }
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set
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{
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previousVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("PreviousVisibility"));
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}
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}
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private Visibility firstVisibility;
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public Visibility FirstVisibility
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{
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get { return firstVisibility; }
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set
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{
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firstVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("FirstVisibility"));
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}
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}
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private Visibility leftJumpVisibility;
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public Visibility LeftJumpVisibility
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{
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get { return leftJumpVisibility; }
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set
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{
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leftJumpVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("LeftJumpVisibility"));
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}
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}
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private Visibility previousSecondVisibility;
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public Visibility PreviousSecondVisibility
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{
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get { return previousSecondVisibility; }
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set
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{
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previousSecondVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("PreviousSecondVisibility"));
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}
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}
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private Visibility previousFirstVisibility;
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public Visibility PreviousFirstVisibility
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{
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get { return previousFirstVisibility; }
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set
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{
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previousFirstVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("PreviousFirstVisibility"));
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}
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}
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// 控制Current右边的控件
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private Visibility nextFirstVisibility;
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public Visibility NextFirstVisibility
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{
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get { return nextFirstVisibility; }
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set
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{
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nextFirstVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("NextFirstVisibility"));
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}
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}
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private Visibility nextSecondVisibility;
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public Visibility NextSecondVisibility
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{
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get { return nextSecondVisibility; }
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set
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{
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nextSecondVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("NextSecondVisibility"));
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}
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}
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private Visibility rightJumpVisibility;
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public Visibility RightJumpVisibility
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{
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get { return rightJumpVisibility; }
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set
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{
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rightJumpVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("RightJumpVisibility"));
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}
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}
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private Visibility lastVisibility;
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public Visibility LastVisibility
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{
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get { return lastVisibility; }
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set
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{
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lastVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("LastVisibility"));
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}
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}
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private Visibility nextVisibility;
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public Visibility NextVisibility
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{
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get { return nextVisibility; }
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set
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{
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nextVisibility = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("NextVisibility"));
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}
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}
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#endregion
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private MyDelegateCommand previousCommand;
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public MyDelegateCommand PreviousCommand => previousCommand ?? (previousCommand = new MyDelegateCommand(PreviousExecuted));
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public void PreviousExecuted(object obj)
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{
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Current -= 1;
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SetView();
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}
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private MyDelegateCommand firstCommand;
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public MyDelegateCommand FirstCommand => firstCommand ?? (firstCommand = new MyDelegateCommand(FirstExecuted));
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public void FirstExecuted(object obj)
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{
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Current = 1;
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SetView();
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}
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private MyDelegateCommand previousSecondCommand;
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public MyDelegateCommand PreviousSecondCommand => previousSecondCommand ?? (previousSecondCommand = new MyDelegateCommand(PreviousSecondExecuted));
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public void PreviousSecondExecuted(object obj)
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{
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Current -= 2;
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SetView();
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}
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private MyDelegateCommand previousFirstCommand;
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public MyDelegateCommand PreviousFirstCommand => previousFirstCommand ?? (previousFirstCommand = new MyDelegateCommand(PreviousFirstExecuted));
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public void PreviousFirstExecuted(object obj)
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{
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Current -= 1;
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SetView();
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}
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private MyDelegateCommand nextFirstCommand;
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public MyDelegateCommand NextFirstCommand => nextFirstCommand ?? (nextFirstCommand = new MyDelegateCommand(NextFirstExecuted));
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public void NextFirstExecuted(object obj)
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{
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Current += 1;
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SetView();
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}
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private MyDelegateCommand nextSecondCommand;
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public MyDelegateCommand NextSecondCommand => nextSecondCommand ?? (nextSecondCommand = new MyDelegateCommand(NextSecondExecuted));
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public void NextSecondExecuted(object obj)
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{
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Current += 2;
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SetView();
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}
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private MyDelegateCommand lastCommand;
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public MyDelegateCommand LastCommand => lastCommand ?? (lastCommand = new MyDelegateCommand(LastExecuted));
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public void LastExecuted(object obj)
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{
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Current = Count;
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SetView();
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}
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private MyDelegateCommand nextCommand;
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public MyDelegateCommand NextCommand => nextCommand ?? (nextCommand = new MyDelegateCommand(NextExecuted));
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public void NextExecuted(object obj)
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{
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Current += 1;
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SetView();
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}
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/// <summary>
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/// 控制显示，暴力实现，以后重构
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/// </summary>
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private void SetView()
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{
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First = 1;
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PreviousSecond = Current - 2;
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PreviousFirst = Current - 1;
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NextFirst = Current + 1;
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NextSecond = Current + 2;
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// 控制Current左边的控件
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if (Current == 1)
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{
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PreviousVisibility = Visibility.Collapsed;
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FirstVisibility = Visibility.Collapsed;
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LeftJumpVisibility = Visibility.Collapsed;
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PreviousSecondVisibility = Visibility.Collapsed;
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PreviousFirstVisibility = Visibility.Collapsed;
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}
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else if (Current == 2)
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{
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PreviousVisibility = Visibility.Visible;
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FirstVisibility = Visibility.Collapsed;
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LeftJumpVisibility = Visibility.Collapsed;
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PreviousSecondVisibility = Visibility.Collapsed;
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PreviousFirstVisibility = Visibility.Visible;
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}
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else if (Current == 3)
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{
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PreviousVisibility = Visibility.Visible;
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FirstVisibility = Visibility.Collapsed;
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LeftJumpVisibility = Visibility.Collapsed;
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PreviousSecondVisibility = Visibility.Visible;
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PreviousFirstVisibility = Visibility.Visible;
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}
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else if (Current == 4)
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{
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|
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PreviousVisibility = Visibility.Visible;
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|
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FirstVisibility = Visibility.Visible;
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LeftJumpVisibility = Visibility.Collapsed;
|
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PreviousSecondVisibility = Visibility.Visible;
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PreviousFirstVisibility = Visibility.Visible;
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}
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else
|
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|
|
{
|
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|
|
PreviousVisibility = Visibility.Visible;
|
|
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|
|
FirstVisibility = Visibility.Visible;
|
|
|
|
|
LeftJumpVisibility = Visibility.Visible;
|
|
|
|
|
PreviousSecondVisibility = Visibility.Visible;
|
|
|
|
|
PreviousFirstVisibility = Visibility.Visible;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 控制Current右边的控件
|
|
|
|
|
if (Current == Count)
|
|
|
|
|
{
|
|
|
|
|
NextFirstVisibility = Visibility.Collapsed;
|
|
|
|
|
NextSecondVisibility = Visibility.Collapsed;
|
|
|
|
|
RightJumpVisibility = Visibility.Collapsed;
|
|
|
|
|
LastVisibility = Visibility.Collapsed;
|
|
|
|
|
NextVisibility = Visibility.Collapsed;
|
|
|
|
|
}
|
|
|
|
|
else if (Current == Count - 1)
|
|
|
|
|
{
|
|
|
|
|
NextFirstVisibility = Visibility.Visible;
|
|
|
|
|
NextSecondVisibility = Visibility.Collapsed;
|
|
|
|
|
RightJumpVisibility = Visibility.Collapsed;
|
|
|
|
|
LastVisibility = Visibility.Collapsed;
|
|
|
|
|
NextVisibility = Visibility.Visible;
|
|
|
|
|
}
|
|
|
|
|
else if (Current == Count - 2)
|
|
|
|
|
{
|
|
|
|
|
NextFirstVisibility = Visibility.Visible;
|
|
|
|
|
NextSecondVisibility = Visibility.Visible;
|
|
|
|
|
RightJumpVisibility = Visibility.Collapsed;
|
|
|
|
|
LastVisibility = Visibility.Collapsed;
|
|
|
|
|
NextVisibility = Visibility.Visible;
|
|
|
|
|
}
|
|
|
|
|
else if (Current == Count - 3)
|
|
|
|
|
{
|
|
|
|
|
NextFirstVisibility = Visibility.Visible;
|
|
|
|
|
NextSecondVisibility = Visibility.Visible;
|
|
|
|
|
RightJumpVisibility = Visibility.Collapsed;
|
|
|
|
|
LastVisibility = Visibility.Visible;
|
|
|
|
|
NextVisibility = Visibility.Visible;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
NextFirstVisibility = Visibility.Visible;
|
|
|
|
|
NextSecondVisibility = Visibility.Visible;
|
|
|
|
|
RightJumpVisibility = Visibility.Visible;
|
|
|
|
|
LastVisibility = Visibility.Visible;
|
|
|
|
|
NextVisibility = Visibility.Visible;
|
|
|
|
|
}
|
|
|
|
|
}
|
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|
}
|
|
|
|
|
}
|
croire
3 years ago