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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace RealTimeGraphEx.FastGraphs
{
public class RealTimeGraphExLineErase : RealTimeGraphExLineScroll, INotifyPropertyChanged
{
#region Cross Thread Fields
protected Color _markerColor;
protected bool _showMarker;
protected bool _endReached;
protected int _currentReplaceIndex;
protected bool _enableMarkerPosition;
protected double lastVirtualValue;
protected int lastMaxPoints;
#endregion
#region Properties
/// <summary>
/// Gets or sets the graph marker color.
/// </summary>
public Color MarkerColor
{
get { return (Color)GetValue(MarkerColorProperty); }
set { SetValue(MarkerColorProperty, value); }
}
public static readonly DependencyProperty MarkerColorProperty =
DependencyProperty.Register("MarkerBrush", typeof(Color), typeof(RealTimeGraphExLineErase), new PropertyMetadata(Colors.Red, new PropertyChangedCallback(CrossModelChanged)));
/// <summary>
/// Gets or sets whether to display the marker on the graph.
/// </summary>
public bool ShowMarker
{
get { return (bool)GetValue(ShowMarkerProperty); }
set { SetValue(ShowMarkerProperty, value); }
}
public static readonly DependencyProperty ShowMarkerProperty =
DependencyProperty.Register("ShowMarker", typeof(bool), typeof(RealTimeGraphExLineErase), new PropertyMetadata(true, new PropertyChangedCallback(CrossModelChanged)));
/// <summary>
/// Gets or sets a value indicating whether to enable the MarkerPosition property to be updated. (Affects performance).
/// </summary>
public bool EnableMarkerPosition
{
get { return (bool)GetValue(EnableMarkerPositionProperty); }
set { SetValue(EnableMarkerPositionProperty, value); }
}
public static readonly DependencyProperty EnableMarkerPositionProperty =
DependencyProperty.Register("EnableMarkerPosition", typeof(bool), typeof(RealTimeGraphExLineErase), new PropertyMetadata(false, new PropertyChangedCallback(CrossModelChanged)));
/// <summary>
/// Gets the current marker position on the graph.
/// </summary>
private Point markerPosition;
public Point MarkerPosition
{
private get { return markerPosition; }
set { markerPosition = value; RaisePropertyChanged("MarkerPosition"); }
}
#endregion
#region Constructors
public RealTimeGraphExLineErase()
: base()
{
}
#endregion
#region Override Method
protected override void OnSetCrossThreadFields()
{
base.OnSetCrossThreadFields();
this.Dispatcher.Invoke(() =>
{
_markerColor = MarkerColor;
_showMarker = ShowMarker;
_enableMarkerPosition = EnableMarkerPosition;
if (lastMaxPoints > _maxPoints && graphPolygon.Count > (lastMaxPoints - _maxPoints))
{
graphPolygon.RemoveFromStart(lastMaxPoints - _maxPoints);
}
lastMaxPoints = _maxPoints;
}, System.Windows.Threading.DispatcherPriority.Send);
}
protected internal override void OnRenderGraph()
{
if (_graphController != null && _graphController.dataSeries != null && _graphController.dataSeries.Points != null && _graphController.dataSeries.Points.Count > 0 && _width > 1 && _height > 1)
{
var points = _graphController.dataSeries.Points.GetAndClearAllPoints();
if (!_isPaused)
{
for (int i = 0; i < points.Count; i++) //Match
{
double value = points[i];
NormalizeValue(ref value);
lastVirtualValue = value;
if (graphPolygon.Count > _maxPoints)
{
graphPolygon.Replace(value, _currentReplaceIndex++);
for (int k = 0; k < _markers.Count; k++)
{
if (_markers[k] == _currentReplaceIndex)
{
_markers.RemoveAt(k);
k--;
}
}
}
else
{
graphPolygon.Add(value);
}
xValueCounter += _scaleFactor;
if (_currentReplaceIndex == graphPolygon.Count - 1)
{
xValueCounter = 0;
_currentReplaceIndex = 0;
}
}
}
updateCounter++;
if (updateCounter >= 1)
{
updateCounter = 0;
if (!_disableRendering)
{
WriteableBitmap bmp = BitmapFactory.New((int)_mainWidth, (int)_mainHeight);
bmp.Clear(Colors.Transparent);
OnDrawVisuals(bmp);
bmp.Freeze();
img.Dispatcher.BeginInvoke(new Action(() =>
{
img.Source = bmp;
}), System.Windows.Threading.DispatcherPriority.Send);
}
}
}
}
protected override void OnDrawVisuals(WriteableBitmap bmp)
{
if (_graphController == null) return;
Color stroke = _graphController.dataSeries.GetStrokeColor() != null ? _graphController.dataSeries.GetStrokeColor().Value : _stroke;
Color fill = _graphController.dataSeries.GetFillColor() != null ? _graphController.dataSeries.GetFillColor().Value : _fill;
double scale = GetPolygonScaleFactor();
double currentWidth = _endReached ? _width : xValueCounter;
if (_fillGraph) //Fill Graph
{
bmp.FillPolygon(graphPolygon.ToPolygonPointsFill(_offSetX, _offSetY, _mainWidth, _mainHeight, scale, ConvertYToImageYFliped), fill);
}
DrawPolyline(bmp, graphPolygon.ToPolygonPoints(_offSetX, _offSetY, scale, ConvertYToImageYFliped), stroke);
//Draw marker
if (_showMarker)
{
if (_currentReplaceIndex > 0)
{
try
{
double x = (((_currentReplaceIndex - 1) * scale) + _offSetX);
bmp.DrawLine((int)x, 0, (int)x, (int)_mainHeight, _markerColor);
}
catch
{
Debug.WriteLine("[RealTimeGraphExLineErase] [OnDrawVisuals] Error on drawing marker!");
}
}
}
for (int j = 0; j < _markers.Count; j++)
{
int x = (int)(((_markers[j] - 1) * scale) + _offSetX);
bmp.DrawLine(x, 0, x, (int)_mainHeight, Colors.Silver);
}
if (_enableMarkerPosition)
{
MarkerPosition = new Point((_currentReplaceIndex * scale) + _offSetX, ConvertYToImageYFliped(lastVirtualValue) + _offSetY);
}
}
protected override void OnClearGraph()
{
base.OnClearGraph();
_currentReplaceIndex = 0;
_endReached = false;
MarkerPosition = new Point(0, 0);
}
protected override void OnPushMarker()
{
if (_currentReplaceIndex != 0)
{
_markers.Add(_currentReplaceIndex);
}
}
#endregion
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
public void RaisePropertyChanged(String propName)
{
this.Dispatcher.Invoke(() =>
{
if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propName));
});
}
#endregion
}
}
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