WPF实现LED数字效果展示

贴代码

public class DigitalMeter : Canvas{private int numDigits;static DigitalMeter(){DefaultStyleKeyProperty.OverrideMetadata(typeof(DigitalMeter), new FrameworkPropertyMetadata(typeof(DigitalMeter)));}public DigitalMeter(){UpdateControls();}public static readonly DependencyProperty FormatStringProperty =DependencyProperty.Register("FormatString", typeof(string), typeof(DigitalMeter), new PropertyMetadata("000.00", OnLayoutPropertyChanged));public string FormatString{get { return (string)GetValue(FormatStringProperty); }set { SetValue(FormatStringProperty, value); }}public static readonly DependencyProperty BackColorProperty =DependencyProperty.Register("BackColor", typeof(Color), typeof(DigitalMeter), new PropertyMetadata(Color.FromArgb(0, 0, 0, 0), OnColorPropertyChanged));public Color BackColor{get { return (Color)GetValue(BackColorProperty); }set{SetValue(BackColorProperty, value);}}public static readonly DependencyProperty ForeColorProperty =DependencyProperty.Register("ForeColor", typeof(Color), typeof(DigitalMeter), new PropertyMetadata(Color.FromRgb(255, 0, 0), OnColorPropertyChanged));public Color ForeColor{get { return (Color)GetValue(ForeColorProperty); }set { SetValue(ForeColorProperty, value); }}public static readonly DependencyProperty SignedProperty =DependencyProperty.Register("Signed", typeof(bool), typeof(DigitalMeter), new PropertyMetadata(false, OnLayoutPropertyChanged));public bool Signed{get { return (bool)GetValue(SignedProperty); }set { SetValue(SignedProperty, value); }}public static readonly DependencyProperty ValueProperty =DependencyProperty.Register("Value", typeof(double), typeof(DigitalMeter), new PropertyMetadata(default(double), OnValuePropertyChanged));public double Value{get { return (double)GetValue(ValueProperty); }set { SetValue(ValueProperty, value); }}private static void OnLayoutPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e){var meters = d as DigitalMeter;if (meters == null)return;meters.UpdateControls();}private static void OnColorPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e){var meters = d as DigitalMeter;if (meters == null || meters.Children.Count < 1)return;foreach (var child in meters.Children){var disp = child as DigitalDisplay;if (disp == null)continue;disp.BackColor =
meters.BackColor;disp.ForeColor =
meters.ForeColor;}}private static void OnValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e){var meters = d as DigitalMeter;if (meters == null)return;var str = meters.Value.ToString(meters.FormatString);str = str.Replace(".", string.Empty);str = str.Replace(",", string.Empty);var sign = false;if (str[0] == '-'){sign = true;str = str.TrimStart(new[] { '-' });}if (str.Length > meters.numDigits){foreach (var child in meters.Children){var disp = child as DigitalDisplay;if (disp != null) disp.Value = 'E';}return;}int idx;for (idx = str.Length - 1; idx >= 0; idx--){var id = idx;if (meters.Signed)id++;var disp = meters.Children[id] as DigitalDisplay;if (disp != null) disp.Value = Convert.ToInt32(str[idx].ToString(CultureInfo.InvariantCulture));}var s = meters.Children[0] as DigitalDisplay;if (s != null && s.Name.Equals("digit_sign", StringComparison.CurrentCulture)){if (sign)s.Value = '-';elses.Value = -1;}}/// <summary>/// Update the controls of the meter/// </summary>private void UpdateControls(){string strFormat = FormatString;var count = strFormat.Length;var seps = new[] { '.', ',' };var sepIndex = strFormat.IndexOfAny(seps);if (sepIndex > 0){count--;numDigits = count;}numDigits = count;Children.Clear();if (Signed){var disp = new DigitalDisplay { Name = "digit_sign", Value = -1, BackColor = BackColor, ForeColor =
ForeColor };Children.Add(disp);}for (var idx = 0; idx < count; idx++){var disp = new DigitalDisplay { Name = "digit_" + idx, BackColor = BackColor, ForeColor =
ForeColor };if (sepIndex - 1 == idx)disp.ShowDot = true;Children.Add(disp);}RepositionControls();}/// <summary>/// Reposition of the digital displaies/// </summary>private void RepositionControls(){if (Children.Count <= 0)return;var digitW = RenderSize.Width / Children.Count;var signFind = false;foreach (var disp in Children){var d = disp as DigitalDisplay;if (d == null)continue;var idDigit = 0;if (d.Name.Contains("digit_sign")){signFind = true;}else{if (d.Name.Contains("digit_")){var s = d.Name.Remove(0, 6);idDigit = Convert.ToInt32(s);if (signFind)idDigit++;}}d.Width = digitW;d.Height = RenderSize.Height;SetLeft(d, idDigit * (digitW -
0.5));SetTop(d, 0);}OnValuePropertyChanged(this, new DependencyPropertyChangedEventArgs(ValueProperty, 0,
Value));}protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo){base.OnRenderSizeChanged(sizeInfo);RepositionControls();}}

public class DigitalDisplay : FrameworkElement{#region Constantspublic const int WIDTH_PIXEL = 11;public const int HEIGHT_PIXELS = 18;#endregion#region Constructorsstatic DigitalDisplay(){DefaultStyleKeyProperty.OverrideMetadata(typeof(DigitalDisplay), new FrameworkPropertyMetadata(typeof(DigitalDisplay)));CreateSegmetsData();CreateDefPointsCoordinates();CreateSegmentsValuesList();}#endregion#region Private Variables/// <summary>/// Segments data array/// </summary>private static readonly SegmentDictionary Segments = new SegmentDictionary();/// <summary>/// Defaults points coordinates/// </summary>private static readonly PointsList DefPoints = new PointsList();/// <summary>/// Segments list of a value/// </summary>private static readonly SegmentsValueDictionary ValuesSegments = new SegmentsValueDictionary();#endregion#region Dependency Propertiesprivate static void OnDisplayPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e){var digital = d as DigitalDisplay;if (digital != null)digital.InvalidateVisual();}public static readonly DependencyProperty ValueProperty =DependencyProperty.Register("Value", typeof(int), typeof(DigitalDisplay), new PropertyMetadata(0, OnDisplayPropertyChanged));public int Value{get { return (int)GetValue(ValueProperty); }set{SetValue(ValueProperty, value);}}public static readonly DependencyProperty ShowDotProperty =DependencyProperty.Register("ShowDot", typeof(bool), typeof(DigitalDisplay), new PropertyMetadata(false, OnDisplayPropertyChanged));public bool ShowDot{get { return (bool)GetValue(ShowDotProperty); }set { SetValue(ShowDotProperty, value); }}public static readonly DependencyProperty ForeColorProperty =DependencyProperty.Register("ForeColor", typeof(Color), typeof(DigitalDisplay), new PropertyMetadata(Color.FromRgb(255, 0, 0), OnDisplayPropertyChanged));public Color ForeColor{get { return (Color)GetValue(ForeColorProperty); }set { SetValue(ForeColorProperty, value); }}public static readonly DependencyProperty BackColorProperty =DependencyProperty.Register("BackColor", typeof(Color), typeof(DigitalDisplay), new PropertyMetadata(Color.FromRgb(0, 0, 0), OnDisplayPropertyChanged));public Color BackColor{get { return (Color)GetValue(BackColorProperty); }set { SetValue(BackColorProperty, value); }}#endregion#region Static Methods/// <summary>/// Creation of the default points list of the/// all segments/// </summary>private static void CreateDefPointsCoordinates(){var pt = new Point(3F, 1F);DefPoints.Add(pt);pt = new Point(8F, 1F);DefPoints.Add(pt);pt = new Point(9F, 2F);DefPoints.Add(pt);pt = new Point(10F, 3F);DefPoints.Add(pt);pt = new Point(10F, 8F);DefPoints.Add(pt);pt = new Point(9F, 9F);DefPoints.Add(pt);pt = new Point(10F, 10F);DefPoints.Add(pt);pt = new Point(10F, 15F);DefPoints.Add(pt);pt = new Point(9F, 16F);DefPoints.Add(pt);pt = new Point(8F, 17F);DefPoints.Add(pt);pt = new Point(3F, 17F);DefPoints.Add(pt);pt = new Point(2F, 16F);DefPoints.Add(pt);pt = new Point(1F, 15F);DefPoints.Add(pt);pt = new Point(1F, 10F);DefPoints.Add(pt);pt = new Point(2F, 9F);DefPoints.Add(pt);pt = new Point(1F, 8F);DefPoints.Add(pt);pt = new Point(1F, 3F);DefPoints.Add(pt);pt = new Point(2F, 2F);DefPoints.Add(pt);pt = new Point(3F, 3F);DefPoints.Add(pt);pt = new Point(8F, 3F);DefPoints.Add(pt);pt = new Point(8F, 8F);DefPoints.Add(pt);pt = new Point(8F, 10F);DefPoints.Add(pt);pt = new Point(8F, 15F);DefPoints.Add(pt);pt = new Point(3F, 15F);DefPoints.Add(pt);pt = new Point(3F, 10F);DefPoints.Add(pt);pt = new Point(3F, 8F);DefPoints.Add(pt);}/// <summary>/// Create the dictionary of the/// segment coordinates/// </summary>private static void CreateSegmetsData(){Segments.Clear();var s = new Segment();s.PointsIndexs[0] = 0;s.PointsIndexs[1] = 1;s.PointsIndexs[2] = 2;s.PointsIndexs[3] = 19;s.PointsIndexs[4] = 18;s.PointsIndexs[5] = 17;Segments.Add('A', s);s = new Segment();s.PointsIndexs[0] = 2;s.PointsIndexs[1] = 3;s.PointsIndexs[2] = 4;s.PointsIndexs[3] = 5;s.PointsIndexs[4] = 20;s.PointsIndexs[5] = 19;Segments.Add('B', s);s = new Segment();s.PointsIndexs[0] = 6;s.PointsIndexs[1] = 7;s.PointsIndexs[2] = 8;s.PointsIndexs[3] = 22;s.PointsIndexs[4] = 21;s.PointsIndexs[5] = 5;Segments.Add('C', s);s = new Segment();s.PointsIndexs[0] = 9;s.PointsIndexs[1] = 10;s.PointsIndexs[2] = 11;s.PointsIndexs[3] = 23;s.PointsIndexs[4] = 22;s.PointsIndexs[5] = 8;Segments.Add('D', s);s = new Segment();s.PointsIndexs[0] = 12;s.PointsIndexs[1] = 13;s.PointsIndexs[2] = 14;s.PointsIndexs[3] = 24;s.PointsIndexs[4] = 23;s.PointsIndexs[5] = 11;Segments.Add('E', s);s = new Segment();s.PointsIndexs[0] = 15;s.PointsIndexs[1] = 16;s.PointsIndexs[2] = 17;s.PointsIndexs[3] = 18;s.PointsIndexs[4] = 25;s.PointsIndexs[5] = 14;Segments.Add('F', s);s = new Segment();s.PointsIndexs[0] = 25;s.PointsIndexs[1] = 20;s.PointsIndexs[2] = 5;s.PointsIndexs[3] = 21;s.PointsIndexs[4] = 24;s.PointsIndexs[5] = 14;Segments.Add('G', s);}/// <summary>/// Create the dictionary of the segments/// for the number values/// </summary>private static void CreateSegmentsValuesList(){var list = new SegmentsList { 'A', 'B', 'C', 'D', 'E', 'F' };ValuesSegments.Add(0, list);list = new SegmentsList { 'B', 'C' };ValuesSegments.Add(1, list);list = new SegmentsList { 'A', 'B', 'G', 'E', 'D' };ValuesSegments.Add(2, list);list = new SegmentsList { 'A', 'B', 'G', 'C', 'D' };ValuesSegments.Add(3, list);list = new SegmentsList { 'F', 'G', 'B', 'C' };ValuesSegments.Add(4, list);list = new SegmentsList { 'A', 'F', 'G', 'C', 'D' };ValuesSegments.Add(5, list);list = new SegmentsList { 'A', 'F', 'G', 'C', 'D', 'E' };ValuesSegments.Add(6, list);list = new SegmentsList { 'A', 'B', 'C' };ValuesSegments.Add(7, list);list = new SegmentsList { 'A', 'B', 'C', 'D', 'E', 'F', 'G' };ValuesSegments.Add(8, list);list = new SegmentsList { 'A', 'B', 'C', 'D', 'F', 'G' };ValuesSegments.Add(9, list);list = new SegmentsList { 'G' };ValuesSegments.Add('-', list);list = new SegmentsList { 'A', 'D', 'E', 'F', 'G' };ValuesSegments.Add('E', list);}#endregion#region Override Render Logicprotected override void OnRender(DrawingContext drawingContext){double rappW = ActualWidth / WIDTH_PIXEL;double rappH = ActualHeight / HEIGHT_PIXELS;var dotLocation = new Point{X = DefPoints[7].X * rappW,Y = DefPoints[8].Y * rappH +
0.5 * rappH,};var dotRadiusX = rappW * .8;var dotRadiusY = rappH * .8;var pth = new StreamGeometry();using (var sc = pth.Open()){foreach (Segment seg in Segments.Values){for (var idx = 0; idx < seg.PointsIndexs.Length; idx++){var tmpPoint =
DefPoints[seg.PointsIndexs[idx]];if (idx == 0)sc.BeginFigure(new Point(tmpPoint.X * rappW,
tmpPoint.Y * rappH), true, true);elsesc.LineTo(new Point(tmpPoint.X * rappW,
tmpPoint.Y * rappH), false, false);}}}pth.Freeze();drawingContext.DrawRectangle(new SolidColorBrush(BackColor), null, new Rect(0, 0, ActualWidth,
ActualHeight));var offColor = ForeColor;offColor.A = 50;var offBrush = new SolidColorBrush(offColor);drawingContext.DrawGeometry(offBrush, null, pth);drawingContext.DrawEllipse(offBrush, null, dotLocation, dotRadiusX, dotRadiusY);if (ValuesSegments.Contains(Value)){var pth2 = new StreamGeometry();var list = ValuesSegments[Value];using (var sc = pth2.Open()){foreach (var ch in list){var seg = Segments[ch];if (seg == null)continue;for (var idx = 0; idx <
seg.PointsIndexs.Length; idx++){var tmpPoint =
DefPoints[seg.PointsIndexs[idx]];if (idx == 0)sc.BeginFigure(new Point(tmpPoint.X * rappW,
tmpPoint.Y * rappH), true, true);elsesc.LineTo(new Point(tmpPoint.X * rappW,
tmpPoint.Y * rappH), false, false);}}}pth2.Freeze();var onBrush = new SolidColorBrush(ForeColor);drawingContext.DrawGeometry(onBrush, null, pth2);if (ShowDot)drawingContext.DrawEllipse(onBrush, null, dotLocation, dotRadiusX, dotRadiusY);}}#endregion}#region Classes Used By DigitalDisplay/// <summary>/// Dictionary for the segment associated/// to the number/// </summary>public class SegmentDictionary : DictionaryBase{public Segment this[char ch]{set{if (Dictionary.Contains(ch) == false)Add(ch, value);elseDictionary[ch] = value;}get{if (Dictionary.Contains(ch) == false)return null;return (Segment)Dictionary[ch];}}public void Add(char ch, Segment seg){if (Contains(ch) == false)Dictionary.Add(ch, seg);elsethis[ch] = seg;}public bool Contains(char ch){return Dictionary.Contains(ch);}public ICollection Values{get { return Dictionary.Values; }}public ICollection Keys{get { return Dictionary.Keys; }}}/// <summary>/// Class for the segment data/// </summary>public class Segment{private readonly int[] points = new int[6];public int[] PointsIndexs{get { return points; }}}/// <summary>/// Points list/// </summary>public class PointsList : List<Point>{}/// <summary>/// Segments list/// </summary>public class SegmentsList : List<char>{}/// <summary>/// Dictionary for value to segments/// </summary>public class SegmentsValueDictionary : DictionaryBase{public SegmentsList this[int num]{set{if (Dictionary.Contains(num) == false)Add(num, value);elseDictionary[num] = value;}get{if (Dictionary.Contains(num) == false)return null;return (SegmentsList)Dictionary[num];}}public void Add(int num, SegmentsList seg){if (Contains(num) == false)Dictionary.Add(num, seg);elsethis[num] = seg;}public bool Contains(int ch){return Dictionary.Contains(ch);}public ICollection Values{get { return Dictionary.Values; }}public ICollection Keys{get { return Dictionary.Keys; }}}#endregion

使用

  <local:DigitalMeter   Grid.Row="3" Grid.Column="1" Value="34" BackColor="Black" ForeColor="Gold" FormatString="00.0" Signed="True" Margin="3"/>

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WPF实现LED数字效果展示

贴代码

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