From 958cda81a79b376847dd0aa21e2c896217560aad Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Tue, 14 Jan 2020 01:25:29 +0800
Subject: [PATCH] add basic codes

---
 .../UserControl/Controls/PinBoxDemoCtl.xaml   |   6 +-
 .../Controls/Input/PinBox.cs                  | 219 +++++++++++++++++-
 .../Themes/Styles/Base/PinBoxBaseStyle.xaml   |  15 +-
 3 files changed, 236 insertions(+), 4 deletions(-)

diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/PinBoxDemoCtl.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/PinBoxDemoCtl.xaml
index 77c4a6f4..d5175cbc 100644
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/PinBoxDemoCtl.xaml
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/PinBoxDemoCtl.xaml
@@ -1,7 +1,9 @@
 <UserControl x:Class="HandyControlDemo.UserControl.PinBoxDemoCtl"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:userControl="clr-namespace:HandyControlDemo.UserControl"
+             xmlns:hc="https://handyorg.github.io/handycontrol"
              Background="{DynamicResource RegionBrush}">
-    <userControl:UnderConstruction/>
+    <hc:TransitioningContentControl>
+        <hc:PinBox Length="6"/>
+    </hc:TransitioningContentControl>
 </UserControl>
diff --git a/src/Shared/HandyControl_Shared/Controls/Input/PinBox.cs b/src/Shared/HandyControl_Shared/Controls/Input/PinBox.cs
index 86634976..addf3612 100644
--- a/src/Shared/HandyControl_Shared/Controls/Input/PinBox.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Input/PinBox.cs
@@ -1,9 +1,226 @@
-using System.Windows.Controls;
+using System;
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using HandyControl.Data;
+using HandyControl.Tools;
 
 namespace HandyControl.Controls
 {
+    [TemplatePart(Name = ElementPanel, Type = typeof(Panel))]
     public class PinBox : Control
     {
+        private const string ElementPanel = "PART_Panel";
 
+        private static readonly object MinLength = 4;
+
+        private Panel _panel;
+
+        private int _inputIndex;
+
+        private bool _changed;
+
+        private RoutedEventHandler _passwordBoxsGotFocusEventHandler;
+
+        private RoutedEventHandler _passwordBoxsPasswordChangedEventHandler;
+
+        public PinBox()
+        {
+            Loaded += PinBox_Loaded;
+            Unloaded += PinBox_Unloaded;
+        }
+
+        private void PinBox_Unloaded(object sender, RoutedEventArgs e)
+        {
+            RemoveHandler(System.Windows.Controls.PasswordBox.PasswordChangedEvent, _passwordBoxsPasswordChangedEventHandler);
+            RemoveHandler(GotFocusEvent, _passwordBoxsGotFocusEventHandler);
+            
+            Loaded -= PinBox_Loaded;
+            Unloaded -= PinBox_Unloaded;
+        }
+
+        private void PinBox_Loaded(object sender, RoutedEventArgs e)
+        {
+            _passwordBoxsPasswordChangedEventHandler = PasswordBoxsPasswordChanged;
+            AddHandler(System.Windows.Controls.PasswordBox.PasswordChangedEvent, _passwordBoxsPasswordChangedEventHandler);
+            
+            _passwordBoxsGotFocusEventHandler = PasswordBoxsGotFocus;
+            AddHandler(GotFocusEvent, _passwordBoxsGotFocusEventHandler);
+        }
+
+        private void PasswordBoxsPasswordChanged(object sender, RoutedEventArgs e)
+        {
+            if (e.OriginalSource is System.Windows.Controls.PasswordBox passwordBox)
+            {
+                if (passwordBox.Password.Length > 0)
+                {
+                    if (++_inputIndex >= Length)
+                    {
+                        _inputIndex = Length - 1;
+
+                        if (_panel.Children.OfType<System.Windows.Controls.PasswordBox>()
+                            .All(item => item.Password.Any()))
+                        {
+                            FocusManager.SetFocusedElement(this, null);
+                            Keyboard.ClearFocus();
+                            RaiseEvent(new RoutedEventArgs(CompletedEvent, this));
+                        }
+                        return;
+                    }
+                }
+                else
+                {
+                    if (--_inputIndex < 0)
+                    {
+                        _inputIndex = 0;
+                        return;
+                    }
+                }
+
+                _changed = true;
+                FocusManager.SetFocusedElement(this, _panel.Children[_inputIndex]);
+            }
+        }
+
+        private void PasswordBoxsGotFocus(object sender, RoutedEventArgs e)
+        {
+            if (e.OriginalSource is System.Windows.Controls.PasswordBox passwordBox)
+            {
+                _inputIndex = _panel.Children.IndexOf(passwordBox);
+            }
+        }
+
+        protected override void OnPreviewKeyDown(KeyEventArgs e)
+        {
+            base.OnPreviewKeyUp(e);
+
+            if (e.Key == Key.Left)
+            {
+                if (--_inputIndex < 0)
+                {
+                    _inputIndex = 0;
+                    return;
+                }
+
+                FocusManager.SetFocusedElement(this, _panel.Children[_inputIndex]);
+            }
+            else if (e.Key == Key.Right)
+            {
+                if (++_inputIndex >= Length)
+                {
+                    _inputIndex = Length - 1;
+                    return;
+                }
+
+                FocusManager.SetFocusedElement(this, _panel.Children[_inputIndex]);
+            }
+        }
+
+        protected override void OnPreviewKeyUp(KeyEventArgs e)
+        {
+            base.OnPreviewKeyUp(e);
+
+            if (_changed)
+            {
+                _changed = false;
+                return;
+            }
+
+            if (e.Key == Key.Delete || e.Key == Key.Back)
+            {
+                if (--_inputIndex < 0)
+                {
+                    _inputIndex = 0;
+                    return;
+                }
+
+                FocusManager.SetFocusedElement(this, _panel.Children[_inputIndex]);
+            }
+        }
+
+        public static readonly DependencyProperty LengthProperty = DependencyProperty.Register(
+            "Length", typeof(int), typeof(PinBox), new PropertyMetadata(MinLength, null, CoerceLength), ValidateHelper.IsInRangeOfPosInt);
+
+        private static object CoerceLength(DependencyObject d, object basevalue) => (int)basevalue < 4 ? MinLength : basevalue;
+
+        public int Length
+        {
+            get => (int) GetValue(LengthProperty);
+            set => SetValue(LengthProperty, value);
+        }
+
+        public static readonly DependencyProperty ItemMarginProperty = DependencyProperty.Register(
+            "ItemMargin", typeof(Thickness), typeof(PinBox), new PropertyMetadata(default(Thickness)));
+
+        public Thickness ItemMargin
+        {
+            get => (Thickness) GetValue(ItemMarginProperty);
+            set => SetValue(ItemMarginProperty, value);
+        }
+
+        public static readonly DependencyProperty ItemWidthProperty = DependencyProperty.Register(
+            "ItemWidth", typeof(double), typeof(PinBox), new PropertyMetadata(ValueBoxes.Double0Box));
+
+        public double ItemWidth
+        {
+            get => (double) GetValue(ItemWidthProperty);
+            set => SetValue(ItemWidthProperty, value);
+        }
+
+        public static readonly DependencyProperty ItemHeightProperty = DependencyProperty.Register(
+            "ItemHeight", typeof(double), typeof(PinBox), new PropertyMetadata(ValueBoxes.Double0Box));
+
+        public double ItemHeight
+        {
+            get => (double) GetValue(ItemHeightProperty);
+            set => SetValue(ItemHeightProperty, value);
+        }
+
+        public static readonly RoutedEvent CompletedEvent =
+            EventManager.RegisterRoutedEvent("Completed", RoutingStrategy.Bubble,
+                typeof(EventHandler), typeof(PinBox));
+
+        public event EventHandler Completed
+        {
+            add => AddHandler(CompletedEvent, value);
+            remove => RemoveHandler(CompletedEvent, value);
+        }
+
+        private void UpdateItems()
+        {
+            _panel.Children.Clear();
+            var length = Length;
+
+            for (var i = 0; i < length; i++)
+            {
+                _panel.Children.Add(CreatePasswordBox());
+            }
+        }
+
+        private System.Windows.Controls.PasswordBox CreatePasswordBox()
+        {
+            return new System.Windows.Controls.PasswordBox
+            {
+                MaxLength = 1,
+                HorizontalContentAlignment = HorizontalAlignment.Center,
+                VerticalAlignment = VerticalAlignment.Center,
+                Margin = ItemMargin,
+                Width = ItemWidth,
+                Height = ItemHeight,
+                Padding = new Thickness()
+            };
+        }
+
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+
+            _panel = GetTemplateChild(ElementPanel) as Panel;
+            if (_panel != null)
+            {
+                UpdateItems();
+            }
+        }
     }
 }
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/PinBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/PinBoxBaseStyle.xaml
index 98d80b3f..a81214d7 100644
--- a/src/Shared/HandyControl_Shared/Themes/Styles/Base/PinBoxBaseStyle.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/PinBoxBaseStyle.xaml
@@ -2,8 +2,21 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:controls="clr-namespace:HandyControl.Controls">
 
-    <Style x:Key="PinBoxBaseStyle" TargetType="controls:PinBox">
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="../../Basic/Sizes.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
 
+    <Style x:Key="PinBoxBaseStyle" TargetType="controls:PinBox">
+        <Setter Property="ItemMargin" Value="4,0"/>
+        <Setter Property="ItemWidth" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="ItemHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="controls:PinBox">
+                    <UniformGrid Name="PART_Panel" Columns="{TemplateBinding Length}" Rows="1"/>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
     </Style>
 
 </ResourceDictionary>
\ No newline at end of file