970 lines
41 KiB
C#
970 lines
41 KiB
C#
using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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namespace Server.Engines.Reports
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{
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// Modified from MS sample
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//*********************************************************************
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//
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// BarGraph Class
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//
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// This class uses GDI+ to render Bar Chart.
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//
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//*********************************************************************
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public class BarRegion
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{
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public int m_RangeFrom, m_RangeTo;
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public string m_Name;
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public BarRegion(int rangeFrom, int rangeTo, string name)
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{
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this.m_RangeFrom = rangeFrom;
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this.m_RangeTo = rangeTo;
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this.m_Name = name;
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}
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}
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public class BarGraphRenderer : ChartRenderer
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{
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public BarRegion[] _regions;
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//*********************************************************************
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//
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// This method draws all the bars for the graph.
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//
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//*********************************************************************
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public int _interval;
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private const float _graphLegendSpacer = 15F;
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private const float _labelFontSize = 7f;
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private const int _legendFontSize = 9;
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private const float _legendRectangleSize = 10F;
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private const float _spacer = 5F;
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private BarGraphRenderMode _renderMode;
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// Overall related members
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private Color _backColor;
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private string _fontFamily;
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private string _longestTickValue = string.Empty;// Used to calculate max value width
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private float _maxTickValueWidth;// Used to calculate left offset of bar graph
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private float _totalHeight;
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private float _totalWidth;
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// Graph related members
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private float _barWidth;
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private float _bottomBuffer;// Space from bottom to x axis
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private bool _displayBarData;
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private Color _fontColor;
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private float _graphHeight;
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private float _graphWidth;
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private float _maxValue = 0.0f;// = final tick value * tick count
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private float _scaleFactor;// = _maxValue / _graphHeight
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private float _spaceBtwBars;// For now same as _barWidth
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private float _topBuffer;// Space from top to the top of y axis
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private float _xOrigin;// x position where graph starts drawing
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private float _yOrigin;// y position where graph starts drawing
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private string _yLabel;
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private int _yTickCount;
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private float _yTickValue;// Value for each tick = _maxValue/_yTickCount
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// Legend related members
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private bool _displayLegend;
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private float _legendWidth;
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private string _longestLabel = string.Empty;// Used to calculate legend width
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private float _maxLabelWidth = 0.0f;
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private string _xTitle, _yTitle;
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public BarGraphRenderer()
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{
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this.AssignDefaultSettings();
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}
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public BarGraphRenderer(Color bgColor)
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{
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this.AssignDefaultSettings();
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this.BackgroundColor = bgColor;
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}
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public string FontFamily
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{
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get
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{
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return this._fontFamily;
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}
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set
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{
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this._fontFamily = value;
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}
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}
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public BarGraphRenderMode RenderMode
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{
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get
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{
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return this._renderMode;
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}
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set
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{
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this._renderMode = value;
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}
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}
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public Color BackgroundColor
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{
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set
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{
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this._backColor = value;
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}
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}
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public int BottomBuffer
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{
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set
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{
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this._bottomBuffer = Convert.ToSingle(value);
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}
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}
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public Color FontColor
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{
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set
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{
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this._fontColor = value;
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}
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}
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public int Height
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{
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get
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{
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return Convert.ToInt32(this._totalHeight);
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}
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set
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{
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this._totalHeight = Convert.ToSingle(value);
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}
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}
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public int Width
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{
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get
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{
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return Convert.ToInt32(this._totalWidth);
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}
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set
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{
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this._totalWidth = Convert.ToSingle(value);
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}
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}
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public bool ShowLegend
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{
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get
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{
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return this._displayLegend;
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}
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set
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{
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this._displayLegend = value;
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}
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}
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public bool ShowData
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{
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get
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{
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return this._displayBarData;
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}
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set
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{
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this._displayBarData = value;
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}
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}
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public int TopBuffer
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{
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set
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{
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this._topBuffer = Convert.ToSingle(value);
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}
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}
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public string VerticalLabel
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{
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get
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{
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return this._yLabel;
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}
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set
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{
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this._yLabel = value;
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}
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}
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public int VerticalTickCount
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{
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get
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{
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return this._yTickCount;
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}
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set
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{
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this._yTickCount = value;
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}
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}
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public void SetTitles(string xTitle, string yTitle)
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{
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this._xTitle = xTitle;
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this._yTitle = yTitle;
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}
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//*********************************************************************
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//
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// This method collects all data points and calculate all the necessary dimensions
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// to draw the bar graph. It is the method called before invoking the Draw() method.
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// labels is the x values.
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// values is the y values.
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//
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//*********************************************************************
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public void CollectDataPoints(string[] labels, string[] values)
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{
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if (labels.Length == values.Length)
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{
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for (int i = 0; i < labels.Length; i++)
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{
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float temp = Convert.ToSingle(values[i]);
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string shortLbl = this.MakeShortLabel(labels[i]);
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// For now put 0.0 for start position and sweep size
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this.DataPoints.Add(new DataItem(shortLbl, labels[i], temp, 0.0f, 0.0f, this.GetColor(i)));
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// Find max value from data; this is only temporary _maxValue
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if (this._maxValue < temp)
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this._maxValue = temp;
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// Find the longest description
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if (this._displayLegend)
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{
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string currentLbl = labels[i] + " (" + shortLbl + ")";
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float currentWidth = this.CalculateImgFontWidth(currentLbl, _legendFontSize, this.FontFamily);
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if (this._maxLabelWidth < currentWidth)
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{
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this._longestLabel = currentLbl;
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this._maxLabelWidth = currentWidth;
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}
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}
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}
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this.CalculateTickAndMax();
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this.CalculateGraphDimension();
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this.CalculateBarWidth(this.DataPoints.Count, this._graphWidth);
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this.CalculateSweepValues();
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}
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else
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throw new Exception("X data count is different from Y data count");
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}
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//*********************************************************************
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//
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// Same as above; called when user doesn't care about the x values
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//
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//*********************************************************************
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public void CollectDataPoints(string[] values)
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{
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string[] labels = values;
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this.CollectDataPoints(labels, values);
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}
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public void DrawRegions(Graphics gfx)
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{
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if (this._regions == null)
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return;
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using (StringFormat textFormat = new StringFormat())
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{
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textFormat.Alignment = StringAlignment.Center;
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textFormat.LineAlignment = StringAlignment.Center;
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using (Font font = new Font(this._fontFamily, _labelFontSize))
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{
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using (Brush textBrush = new SolidBrush(this._fontColor))
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{
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using (Pen solidPen = new Pen(this._fontColor))
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{
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using (Pen lightPen = new Pen(Color.FromArgb(128, this._fontColor)))
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{
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float labelWidth = this._barWidth + this._spaceBtwBars;
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for (int i = 0; i < this._regions.Length; ++i)
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{
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BarRegion reg = this._regions[i];
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RectangleF rc = new RectangleF(this._xOrigin + (reg.m_RangeFrom * labelWidth), this._yOrigin, (reg.m_RangeTo - reg.m_RangeFrom + 1) * labelWidth, this._graphHeight);
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if (rc.X + rc.Width > this._xOrigin + this._graphWidth)
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rc.Width = this._xOrigin + this._graphWidth - rc.X;
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using (SolidBrush brsh = new SolidBrush(Color.FromArgb(48, this.GetColor(i))))
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gfx.FillRectangle(brsh, rc);
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rc.Offset((rc.Width - 200.0f) * 0.5f, -16.0f);
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rc.Width = 200.0f;
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rc.Height = 20.0f;
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gfx.DrawString(reg.m_Name, font, textBrush, rc, textFormat);
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}
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}
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}
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}
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}
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}
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}
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//*********************************************************************
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//
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// This method returns a bar graph bitmap to the calling function. It is called after
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// all dimensions and data points are calculated.
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//
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//*********************************************************************
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public override Bitmap Draw()
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{
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int height = Convert.ToInt32(this._totalHeight);
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int width = Convert.ToInt32(this._totalWidth);
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Bitmap bmp = new Bitmap(width, height);
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using (Graphics graph = Graphics.FromImage(bmp))
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{
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graph.CompositingQuality = CompositingQuality.HighQuality;
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graph.SmoothingMode = SmoothingMode.AntiAlias;
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using (SolidBrush brsh = new SolidBrush(this._backColor))
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graph.FillRectangle(brsh, -1, -1, bmp.Width + 1, bmp.Height + 1);
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this.DrawRegions(graph);
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this.DrawVerticalLabelArea(graph);
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this.DrawXLabelBack(graph);
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this.DrawBars(graph);
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this.DrawXLabelArea(graph);
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if (this._displayLegend)
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this.DrawLegend(graph);
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}
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return bmp;
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}
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private void DrawBars(Graphics graph)
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{
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SolidBrush brsFont = null;
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Font valFont = null;
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StringFormat sfFormat = null;
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try
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{
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brsFont = new SolidBrush(this._fontColor);
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valFont = new Font(this._fontFamily, _labelFontSize);
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sfFormat = new StringFormat();
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sfFormat.Alignment = StringAlignment.Center;
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int i = 0;
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PointF[] linePoints = null;
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if (this._renderMode == BarGraphRenderMode.Lines)
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linePoints = new PointF[this.DataPoints.Count];
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int pointIndex = 0;
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// Draw bars and the value above each bar
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using (Pen pen = new Pen(this._fontColor,0.15f))
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{
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using (SolidBrush whiteBrsh = new SolidBrush(Color.FromArgb(128, Color.White)))
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{
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foreach (DataItem item in this.DataPoints)
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{
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using (SolidBrush barBrush = new SolidBrush(item.ItemColor))
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{
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float itemY = this._yOrigin + this._graphHeight - item.SweepSize;
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if (this._renderMode == BarGraphRenderMode.Lines)
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{
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linePoints[pointIndex++] = new PointF(this._xOrigin + item.StartPos + (this._barWidth / 2), itemY);
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}
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else if (this._renderMode == BarGraphRenderMode.Bars)
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{
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float ox = this._xOrigin + item.StartPos;
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float oy = itemY;
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float ow = this._barWidth;
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float oh = item.SweepSize;
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float of = 9.5f;
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PointF[] pts = new PointF[]
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{
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new PointF(ox, oy),
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new PointF(ox + ow, oy),
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new PointF(ox + of, oy + of),
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new PointF(ox + of + ow, oy + of),
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new PointF(ox, oy + oh),
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new PointF(ox + of, oy + of + oh),
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new PointF(ox + of + ow, oy + of + oh)
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};
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graph.FillPolygon(barBrush, new PointF[] { pts[2], pts[3], pts[6], pts[5] });
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using (SolidBrush ltBrsh = new SolidBrush(System.Windows.Forms.ControlPaint.Light(item.ItemColor, 0.1f)))
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graph.FillPolygon(ltBrsh, new PointF[] { pts[0], pts[2], pts[5], pts[4] });
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using (SolidBrush drkBrush = new SolidBrush(System.Windows.Forms.ControlPaint.Dark(item.ItemColor, 0.05f)))
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graph.FillPolygon(drkBrush, new PointF[] { pts[0], pts[1], pts[3], pts[2] });
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graph.DrawLine(pen, pts[0], pts[1]);
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graph.DrawLine(pen, pts[0], pts[2]);
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graph.DrawLine(pen, pts[1], pts[3]);
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graph.DrawLine(pen, pts[2], pts[3]);
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graph.DrawLine(pen, pts[2], pts[5]);
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graph.DrawLine(pen, pts[0], pts[4]);
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graph.DrawLine(pen, pts[4], pts[5]);
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graph.DrawLine(pen, pts[5], pts[6]);
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graph.DrawLine(pen, pts[3], pts[6]);
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// Draw data value
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if (this._displayBarData && (i % this._interval) == 0)
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{
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float sectionWidth = (this._barWidth + this._spaceBtwBars);
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float startX = this._xOrigin + (i * sectionWidth) + (sectionWidth / 2); // This draws the value on center of the bar
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float startY = itemY - 2f - valFont.Height; // Positioned on top of each bar by 2 pixels
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RectangleF recVal = new RectangleF(startX - ((sectionWidth * this._interval) / 2), startY, sectionWidth * this._interval, valFont.Height);
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SizeF sz = graph.MeasureString(item.Value.ToString("#,###.##"), valFont, recVal.Size, sfFormat);
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//using ( SolidBrush brsh = new SolidBrush( Color.FromArgb( 180, 255, 255, 255 ) ) )
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// graph.FillRectangle( brsh, new RectangleF(recVal.X+((recVal.Width-sz.Width)/2),recVal.Y+((recVal.Height-sz.Height)/2),sz.Width+4,sz.Height) );
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//graph.DrawString(item.Value.ToString("#,###.##"), valFont, brsFont, recVal, sfFormat);
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for (int box = -1; box <= 1; ++box)
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{
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for (int boy = -1; boy <= 1; ++boy)
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{
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if (box == 0 && boy == 0)
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continue;
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RectangleF rco = new RectangleF(recVal.X + box, recVal.Y + boy, recVal.Width, recVal.Height);
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, whiteBrsh, rco, sfFormat);
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}
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}
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, brsFont, recVal, sfFormat);
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}
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}
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i++;
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}
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}
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if (this._renderMode == BarGraphRenderMode.Lines)
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{
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if (linePoints.Length >= 2)
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{
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using (Pen linePen = new Pen(Color.FromArgb(220, Color.Red), 2.5f))
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graph.DrawCurve(linePen, linePoints, 0.5f);
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}
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using (Pen linePen = new Pen(Color.FromArgb(40, this._fontColor), 0.8f))
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{
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for (int j = 0; j < linePoints.Length; ++j)
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{
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graph.DrawLine(linePen, linePoints[j], new PointF(linePoints[j].X, this._yOrigin + this._graphHeight));
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DataItem item = this.DataPoints[j];
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float itemY = this._yOrigin + this._graphHeight - item.SweepSize;
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// Draw data value
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if (this._displayBarData && (j % this._interval) == 0)
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{
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graph.FillEllipse(brsFont, new RectangleF(linePoints[j].X - 2.0f, linePoints[j].Y - 2.0f, 4.0f, 4.0f));
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float sectionWidth = (this._barWidth + this._spaceBtwBars);
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float startX = this._xOrigin + (j * sectionWidth) + (sectionWidth / 2); // This draws the value on center of the bar
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float startY = itemY - 2f - valFont.Height; // Positioned on top of each bar by 2 pixels
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RectangleF recVal = new RectangleF(startX - ((sectionWidth * this._interval) / 2), startY, sectionWidth * this._interval, valFont.Height);
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SizeF sz = graph.MeasureString(item.Value.ToString("#,###.##"), valFont, recVal.Size, sfFormat);
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//using ( SolidBrush brsh = new SolidBrush( Color.FromArgb( 48, 255, 255, 255 ) ) )
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// graph.FillRectangle( brsh, new RectangleF(recVal.X+((recVal.Width-sz.Width)/2),recVal.Y+((recVal.Height-sz.Height)/2),sz.Width+4,sz.Height) );
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for (int box = -1; box <= 1; ++box)
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{
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for (int boy = -1; boy <= 1; ++boy)
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{
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if (box == 0 && boy == 0)
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continue;
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RectangleF rco = new RectangleF(recVal.X + box, recVal.Y + boy, recVal.Width, recVal.Height);
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, whiteBrsh, rco, sfFormat);
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}
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}
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, brsFont, recVal, sfFormat);
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}
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}
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}
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}
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}
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}
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}
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finally
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{
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if (brsFont != null)
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brsFont.Dispose();
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if (valFont != null)
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valFont.Dispose();
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if (sfFormat != null)
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sfFormat.Dispose();
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}
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}
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//*********************************************************************
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//
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// This method draws the y label, tick marks, tick values, and the y axis.
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//
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//*********************************************************************
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private void DrawVerticalLabelArea(Graphics graph)
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{
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Font lblFont = null;
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SolidBrush brs = null;
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StringFormat lblFormat = null;
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Pen pen = null;
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StringFormat sfVLabel = null;
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float fo = (this._yTitle == null ? 0.0f : 20.0f);
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try
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{
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brs = new SolidBrush(this._fontColor);
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lblFormat = new StringFormat();
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pen = new Pen(this._fontColor);
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if (this._yTitle != null)
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{
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sfVLabel = new StringFormat();
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sfVLabel.Alignment = StringAlignment.Center;
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sfVLabel.LineAlignment = StringAlignment.Center;
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sfVLabel.FormatFlags = StringFormatFlags.DirectionVertical;
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|
|
lblFont = new Font(this._fontFamily, _labelFontSize + 4.0f);
|
|
graph.DrawString(this._yTitle, lblFont, brs, new RectangleF(0.0f, this._yOrigin, 20.0f, this._graphHeight), sfVLabel);
|
|
lblFont.Dispose();
|
|
}
|
|
|
|
sfVLabel = new StringFormat();
|
|
lblFormat.Alignment = StringAlignment.Far;
|
|
lblFormat.FormatFlags |= StringFormatFlags.NoClip;
|
|
|
|
// Draw vertical label at the top of y-axis and place it in the middle top of y-axis
|
|
lblFont = new Font(this._fontFamily, _labelFontSize + 2.0f,FontStyle.Bold);
|
|
RectangleF recVLabel = new RectangleF(0, this._yOrigin - 2 * _spacer - lblFont.Height, this._xOrigin * 2, lblFont.Height);
|
|
sfVLabel.Alignment = StringAlignment.Center;
|
|
sfVLabel.FormatFlags |= StringFormatFlags.NoClip;
|
|
//graph.DrawRectangle(Pens.Black,Rectangle.Truncate(recVLabel));
|
|
graph.DrawString(this._yLabel, lblFont, brs, recVLabel, sfVLabel);
|
|
lblFont.Dispose();
|
|
|
|
lblFont = new Font(this._fontFamily, _labelFontSize);
|
|
// Draw all tick values and tick marks
|
|
using (Pen smallPen = new Pen(Color.FromArgb(96, this._fontColor),0.8f))
|
|
{
|
|
for (int i = 0; i < this._yTickCount; i++)
|
|
{
|
|
float currentY = this._topBuffer + (i * this._yTickValue / this._scaleFactor); // Position for tick mark
|
|
float labelY = currentY - lblFont.Height / 2; // Place label in the middle of tick
|
|
RectangleF lblRec = new RectangleF(_spacer + fo - 6, labelY, this._maxTickValueWidth, lblFont.Height);
|
|
|
|
float currentTick = this._maxValue - i * this._yTickValue; // Calculate tick value from top to bottom
|
|
graph.DrawString(currentTick.ToString("#,###.##"), lblFont, brs, lblRec, lblFormat); // Draw tick value
|
|
graph.DrawLine(pen, this._xOrigin, currentY, this._xOrigin - 4.0f, currentY); // Draw tick mark
|
|
|
|
graph.DrawLine(smallPen, this._xOrigin, currentY, this._xOrigin + this._graphWidth, currentY);
|
|
}
|
|
}
|
|
|
|
// Draw y axis
|
|
graph.DrawLine(pen, this._xOrigin, this._yOrigin, this._xOrigin, this._yOrigin + this._graphHeight);
|
|
}
|
|
finally
|
|
{
|
|
if (lblFont != null)
|
|
lblFont.Dispose();
|
|
if (brs != null)
|
|
brs.Dispose();
|
|
if (lblFormat != null)
|
|
lblFormat.Dispose();
|
|
if (pen != null)
|
|
pen.Dispose();
|
|
if (sfVLabel != null)
|
|
sfVLabel.Dispose();
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method draws x axis and all x labels
|
|
//
|
|
//*********************************************************************
|
|
private void DrawXLabelBack(Graphics graph)
|
|
{
|
|
Font lblFont = null;
|
|
SolidBrush brs = null;
|
|
StringFormat lblFormat = null;
|
|
Pen pen = null;
|
|
|
|
try
|
|
{
|
|
lblFont = new Font(this._fontFamily, _labelFontSize);
|
|
brs = new SolidBrush(this._fontColor);
|
|
lblFormat = new StringFormat();
|
|
pen = new Pen(this._fontColor);
|
|
|
|
lblFormat.Alignment = StringAlignment.Center;
|
|
|
|
// Draw x axis
|
|
graph.DrawLine(pen, this._xOrigin, this._yOrigin + this._graphHeight, this._xOrigin + this._graphWidth, this._yOrigin + this._graphHeight);
|
|
}
|
|
finally
|
|
{
|
|
if (lblFont != null)
|
|
lblFont.Dispose();
|
|
if (brs != null)
|
|
brs.Dispose();
|
|
if (lblFormat != null)
|
|
lblFormat.Dispose();
|
|
if (pen != null)
|
|
pen.Dispose();
|
|
}
|
|
}
|
|
|
|
private void DrawXLabelArea(Graphics graph)
|
|
{
|
|
Font lblFont = null;
|
|
SolidBrush brs = null;
|
|
StringFormat lblFormat = null;
|
|
Pen pen = null;
|
|
|
|
try
|
|
{
|
|
brs = new SolidBrush(this._fontColor);
|
|
pen = new Pen(this._fontColor);
|
|
|
|
if (this._xTitle != null)
|
|
{
|
|
lblFormat = new StringFormat();
|
|
lblFormat.Alignment = StringAlignment.Center;
|
|
lblFormat.LineAlignment = StringAlignment.Center;
|
|
// sfVLabel.FormatFlags=StringFormatFlags.DirectionVertical;
|
|
|
|
lblFont = new Font(this._fontFamily, _labelFontSize + 2.0f, FontStyle.Bold);
|
|
graph.DrawString(this._xTitle, lblFont, brs, new RectangleF(this._xOrigin, this._yOrigin + this._graphHeight + 14.0f + (this._renderMode == BarGraphRenderMode.Bars ? 10.0f : 0.0f) + ((this.DataPoints.Count / this._interval) > 24 ? 16.0f : 0.0f), this._graphWidth, 20.0f), lblFormat);
|
|
}
|
|
|
|
lblFont = new Font(this._fontFamily, _labelFontSize);
|
|
lblFormat = new StringFormat();
|
|
lblFormat.Alignment = StringAlignment.Center;
|
|
lblFormat.FormatFlags |= StringFormatFlags.NoClip;
|
|
lblFormat.Trimming = StringTrimming.None;
|
|
//lblFormat.FormatFlags |= StringFormatFlags.NoWrap;
|
|
|
|
float of = 0.0f;
|
|
|
|
if (this._renderMode == BarGraphRenderMode.Bars)
|
|
{
|
|
of = 10.0f;
|
|
|
|
// Draw x axis
|
|
graph.DrawLine(pen, this._xOrigin + of, this._yOrigin + this._graphHeight + of, this._xOrigin + this._graphWidth + of, this._yOrigin + this._graphHeight + of);
|
|
|
|
graph.DrawLine(pen, this._xOrigin, this._yOrigin + this._graphHeight, this._xOrigin + of, this._yOrigin + this._graphHeight + of);
|
|
graph.DrawLine(pen, this._xOrigin + this._graphWidth, this._yOrigin + this._graphHeight, this._xOrigin + of + this._graphWidth, this._yOrigin + this._graphHeight + of);
|
|
}
|
|
|
|
float currentX;
|
|
float currentY = this._yOrigin + this._graphHeight + 2.0f; // All x labels are drawn 2 pixels below x-axis
|
|
float labelWidth = this._barWidth + this._spaceBtwBars; // Fits exactly below the bar
|
|
int i = 0;
|
|
|
|
// Draw x labels
|
|
foreach (DataItem item in this.DataPoints)
|
|
{
|
|
if ((i % this._interval) == 0)
|
|
{
|
|
currentX = this._xOrigin + (i * labelWidth) + of + (labelWidth / 2);
|
|
RectangleF recLbl = new RectangleF(currentX - ((labelWidth * this._interval) / 2), currentY + of, labelWidth * this._interval, lblFont.Height * 2);
|
|
string lblString = this._displayLegend ? item.Label : item.Description; // Decide what to show: short or long
|
|
|
|
graph.DrawString(lblString, lblFont, brs, recLbl, lblFormat);
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (lblFont != null)
|
|
lblFont.Dispose();
|
|
if (brs != null)
|
|
brs.Dispose();
|
|
if (lblFormat != null)
|
|
lblFormat.Dispose();
|
|
if (pen != null)
|
|
pen.Dispose();
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method determines where to place the legend box.
|
|
// It draws the legend border, legend description, and legend color code.
|
|
//
|
|
//*********************************************************************
|
|
private void DrawLegend(Graphics graph)
|
|
{
|
|
Font lblFont = null;
|
|
SolidBrush brs = null;
|
|
StringFormat lblFormat = null;
|
|
Pen pen = null;
|
|
|
|
try
|
|
{
|
|
lblFont = new Font(this._fontFamily, _legendFontSize);
|
|
brs = new SolidBrush(this._fontColor);
|
|
lblFormat = new StringFormat();
|
|
pen = new Pen(this._fontColor);
|
|
lblFormat.Alignment = StringAlignment.Near;
|
|
|
|
// Calculate Legend drawing start point
|
|
float startX = this._xOrigin + this._graphWidth + _graphLegendSpacer;
|
|
float startY = this._yOrigin;
|
|
|
|
float xColorCode = startX + _spacer;
|
|
float xLegendText = xColorCode + _legendRectangleSize + _spacer;
|
|
float legendHeight = 0.0f;
|
|
for (int i = 0; i < this.DataPoints.Count; i++)
|
|
{
|
|
DataItem point = this.DataPoints[i];
|
|
string text = point.Description + " (" + point.Label + ")";
|
|
float currentY = startY + _spacer + (i * (lblFont.Height + _spacer));
|
|
legendHeight += lblFont.Height + _spacer;
|
|
|
|
// Draw legend description
|
|
graph.DrawString(text, lblFont, brs, xLegendText, currentY, lblFormat);
|
|
|
|
// Draw color code
|
|
using (SolidBrush brsh = new SolidBrush(this.DataPoints[i].ItemColor))
|
|
graph.FillRectangle(brsh, xColorCode, currentY + 3f, _legendRectangleSize, _legendRectangleSize);
|
|
}
|
|
|
|
// Draw legend border
|
|
graph.DrawRectangle(pen, startX, startY, this._legendWidth, legendHeight + _spacer);
|
|
}
|
|
finally
|
|
{
|
|
if (lblFont != null)
|
|
lblFont.Dispose();
|
|
if (brs != null)
|
|
brs.Dispose();
|
|
if (lblFormat != null)
|
|
lblFormat.Dispose();
|
|
if (pen != null)
|
|
pen.Dispose();
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method calculates all measurement aspects of the bar graph from the given data points
|
|
//
|
|
//*********************************************************************
|
|
private void CalculateGraphDimension()
|
|
{
|
|
this.FindLongestTickValue();
|
|
|
|
// Need to add another character for spacing; this is not used for drawing, just for calculation
|
|
this._longestTickValue += "0";
|
|
//_maxTickValueWidth = CalculateImgFontWidth(_longestTickValue, _labelFontSize, FontFamily);
|
|
this._maxTickValueWidth = 0.0f;
|
|
|
|
float currentTick;
|
|
string tickString;
|
|
for (int i = 0; i < this._yTickCount; i++)
|
|
{
|
|
currentTick = this._maxValue - i * this._yTickValue;
|
|
tickString = currentTick.ToString("#,###.##");
|
|
|
|
float measured = this.CalculateImgFontWidth(tickString, _labelFontSize, this.FontFamily);
|
|
|
|
if (measured > this._maxTickValueWidth)
|
|
this._maxTickValueWidth = measured;
|
|
}
|
|
|
|
float leftOffset = _spacer + this._maxTickValueWidth + (this._yTitle == null ? 0.0f : 20.0f);
|
|
float rtOffset = 0.0f;
|
|
|
|
if (this._displayLegend)
|
|
{
|
|
this._legendWidth = _spacer + _legendRectangleSize + _spacer + this._maxLabelWidth + _spacer;
|
|
rtOffset = _graphLegendSpacer + this._legendWidth + _spacer;
|
|
}
|
|
else
|
|
rtOffset = _spacer; // Make graph in the middle
|
|
|
|
if (this._renderMode == BarGraphRenderMode.Bars)
|
|
rtOffset += 10.0f;
|
|
|
|
rtOffset += 10.0f;
|
|
|
|
this._graphHeight = this._totalHeight - this._topBuffer - this._bottomBuffer - (this._xTitle == null ? 0.0f : 20.0f); // Buffer spaces are used to print labels
|
|
this._graphWidth = this._totalWidth - leftOffset - rtOffset;
|
|
this._xOrigin = leftOffset;
|
|
this._yOrigin = this._topBuffer;
|
|
|
|
// Once the correct _maxValue is determined, then calculate _scaleFactor
|
|
this._scaleFactor = this._maxValue / this._graphHeight;
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method determines the longest tick value from the given data points.
|
|
// The result is needed to calculate the correct graph dimension.
|
|
//
|
|
//*********************************************************************
|
|
private void FindLongestTickValue()
|
|
{
|
|
float currentTick;
|
|
string tickString;
|
|
for (int i = 0; i < this._yTickCount; i++)
|
|
{
|
|
currentTick = this._maxValue - i * this._yTickValue;
|
|
tickString = currentTick.ToString("#,###.##");
|
|
if (this._longestTickValue.Length < tickString.Length)
|
|
this._longestTickValue = tickString;
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method calculates the image width in pixel for a given text
|
|
//
|
|
//*********************************************************************
|
|
private float CalculateImgFontWidth(string text, float size, string family)
|
|
{
|
|
Bitmap bmp = null;
|
|
Graphics graph = null;
|
|
Font font = null;
|
|
|
|
try
|
|
{
|
|
font = new Font(family, size);
|
|
|
|
// Calculate the size of the string.
|
|
bmp = new Bitmap(1,1,PixelFormat.Format32bppArgb);
|
|
graph = Graphics.FromImage(bmp);
|
|
SizeF oSize = graph.MeasureString(text, font);
|
|
oSize.Width = 4 + (float)Math.Ceiling(oSize.Width);
|
|
|
|
return oSize.Width;
|
|
}
|
|
finally
|
|
{
|
|
if (graph != null)
|
|
graph.Dispose();
|
|
if (bmp != null)
|
|
bmp.Dispose();
|
|
if (font != null)
|
|
font.Dispose();
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method creates abbreviation from long description; used for making legend
|
|
//
|
|
//*********************************************************************
|
|
private string MakeShortLabel(string text)
|
|
{
|
|
string label = text;
|
|
if (text.Length > 2)
|
|
{
|
|
int midPostition = Convert.ToInt32(Math.Floor(text.Length / 2.0));
|
|
label = text.Substring(0, 1) + text.Substring(midPostition, 1) + text.Substring(text.Length - 1, 1);
|
|
}
|
|
return label;
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method calculates the max value and each tick mark value for the bar graph.
|
|
//
|
|
//*********************************************************************
|
|
private void CalculateTickAndMax()
|
|
{
|
|
float tempMax = 0.0f;
|
|
|
|
// Give graph some head room first about 10% of current max
|
|
this._maxValue *= 1.1f;
|
|
|
|
if (this._maxValue != 0.0f)
|
|
{
|
|
// Find a rounded value nearest to the current max value
|
|
// Calculate this max first to give enough space to draw value on each bar
|
|
double exp = Convert.ToDouble(Math.Floor(Math.Log10(this._maxValue)));
|
|
tempMax = Convert.ToSingle(Math.Ceiling(this._maxValue / Math.Pow(10, exp)) * Math.Pow(10, exp));
|
|
}
|
|
else
|
|
tempMax = 1.0f;
|
|
|
|
// Once max value is calculated, tick value can be determined; tick value should be a whole number
|
|
this._yTickValue = tempMax / this._yTickCount;
|
|
double expTick = Convert.ToDouble(Math.Floor(Math.Log10(this._yTickValue)));
|
|
this._yTickValue = Convert.ToSingle(Math.Ceiling(this._yTickValue / Math.Pow(10, expTick)) * Math.Pow(10, expTick));
|
|
|
|
// Re-calculate the max value with the new tick value
|
|
this._maxValue = this._yTickValue * this._yTickCount;
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method calculates the height for each bar in the graph
|
|
//
|
|
//*********************************************************************
|
|
private void CalculateSweepValues()
|
|
{
|
|
// Called when all values and scale factor are known
|
|
// All values calculated here are relative from (_xOrigin, _yOrigin)
|
|
int i = 0;
|
|
foreach (DataItem item in this.DataPoints)
|
|
{
|
|
// This implementation does not support negative value
|
|
if (item.Value >= 0)
|
|
item.SweepSize = item.Value / this._scaleFactor;
|
|
|
|
// (_spaceBtwBars/2) makes half white space for the first bar
|
|
item.StartPos = (this._spaceBtwBars / 2) + i * (this._barWidth + this._spaceBtwBars);
|
|
i++;
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method calculates the width for each bar in the graph
|
|
//
|
|
//*********************************************************************
|
|
private void CalculateBarWidth(int dataCount, float barGraphWidth)
|
|
{
|
|
// White space between each bar is the same as bar width itself
|
|
this._barWidth = barGraphWidth / (dataCount * 2); // Each bar has 1 white space
|
|
//_barWidth =/* (float)Math.Floor(*/_barWidth/*)*/;
|
|
this._spaceBtwBars = this._barWidth;
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method assigns default value to the bar graph properties and is only
|
|
// called from BarGraph constructors
|
|
//
|
|
//*********************************************************************
|
|
private void AssignDefaultSettings()
|
|
{
|
|
// default values
|
|
this._totalWidth = 680f;
|
|
this._totalHeight = 450f;
|
|
this._fontFamily = "Verdana";
|
|
this._backColor = Color.White;
|
|
this._fontColor = Color.Black;
|
|
this._topBuffer = 30f;
|
|
this._bottomBuffer = 30f;
|
|
this._yTickCount = 2;
|
|
this._displayLegend = false;
|
|
this._displayBarData = false;
|
|
}
|
|
}
|
|
} |