934 lines
No EOL
32 KiB
C#
934 lines
No EOL
32 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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using System.Windows.Forms;
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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 string m_Name;
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public int m_RangeFrom, m_RangeTo;
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public BarRegion(int rangeFrom, int rangeTo, string name)
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{
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m_RangeFrom = rangeFrom;
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m_RangeTo = rangeTo;
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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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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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// Overall related members
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private Color _backColor;
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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 Color _fontColor;
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private float _graphHeight;
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private float _graphWidth;
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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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// Legend related members
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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 string _longestTickValue = string.Empty; // Used to calculate max value width
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private float _maxLabelWidth;
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private float _maxTickValueWidth; // Used to calculate left offset of bar graph
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private float _maxValue; // = final tick value * tick count
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public BarRegion[] _regions;
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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 _totalHeight;
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private float _totalWidth;
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private float _xOrigin; // x position where graph starts drawing
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private string _xTitle, _yTitle;
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private float _yOrigin; // y position where graph starts drawing
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private float _yTickValue; // Value for each tick = _maxValue/_yTickCount
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public BarGraphRenderer()
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{
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AssignDefaultSettings();
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}
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public BarGraphRenderer(Color bgColor)
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{
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AssignDefaultSettings();
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BackgroundColor = bgColor;
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}
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public string FontFamily{ get; set; }
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public BarGraphRenderMode RenderMode{ get; set; }
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public Color BackgroundColor
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{
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set => _backColor = value;
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}
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public int BottomBuffer
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{
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set => _bottomBuffer = Convert.ToSingle(value);
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}
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public Color FontColor
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{
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set => _fontColor = value;
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}
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public int Height
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{
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get => Convert.ToInt32(_totalHeight);
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set => _totalHeight = Convert.ToSingle(value);
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}
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public int Width
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{
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get => Convert.ToInt32(_totalWidth);
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set => _totalWidth = Convert.ToSingle(value);
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}
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public bool ShowLegend{ get; set; }
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public bool ShowData{ get; set; }
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public int TopBuffer
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{
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set => _topBuffer = Convert.ToSingle(value);
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}
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public string VerticalLabel{ get; set; }
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public int VerticalTickCount{ get; set; }
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public void SetTitles(string xTitle, string yTitle)
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{
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_xTitle = xTitle;
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_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 = MakeShortLabel(labels[i]);
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// For now put 0.0 for start position and sweep size
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DataPoints.Add(new DataItem(shortLbl, labels[i], temp, 0.0f, 0.0f, GetColor(i)));
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// Find max value from data; this is only temporary _maxValue
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if (_maxValue < temp) _maxValue = temp;
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// Find the longest description
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if (ShowLegend)
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{
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string currentLbl = labels[i] + " (" + shortLbl + ")";
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float currentWidth = CalculateImgFontWidth(currentLbl, _legendFontSize, FontFamily);
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if (_maxLabelWidth < currentWidth)
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{
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_longestLabel = currentLbl;
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_maxLabelWidth = currentWidth;
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}
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}
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}
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CalculateTickAndMax();
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CalculateGraphDimension();
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CalculateBarWidth(DataPoints.Count, _graphWidth);
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CalculateSweepValues();
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}
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else
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{
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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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//
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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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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 (_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(FontFamily, _labelFontSize))
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{
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using (Brush textBrush = new SolidBrush(_fontColor))
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{
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using (Pen solidPen = new Pen(_fontColor))
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{
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using (Pen lightPen = new Pen(Color.FromArgb(128, _fontColor)))
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{
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float labelWidth = _barWidth + _spaceBtwBars;
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for (int i = 0; i < _regions.Length; ++i)
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{
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BarRegion reg = _regions[i];
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RectangleF rc = new RectangleF(_xOrigin + reg.m_RangeFrom * labelWidth, _yOrigin,
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(reg.m_RangeTo - reg.m_RangeFrom + 1) * labelWidth, _graphHeight);
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if (rc.X + rc.Width > _xOrigin + _graphWidth)
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rc.Width = _xOrigin + _graphWidth - rc.X;
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using (SolidBrush brsh = new SolidBrush(Color.FromArgb(48, GetColor(i))))
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{
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gfx.FillRectangle(brsh, rc);
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}
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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(_totalHeight);
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int width = Convert.ToInt32(_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(_backColor))
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{
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graph.FillRectangle(brsh, -1, -1, bmp.Width + 1, bmp.Height + 1);
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}
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DrawRegions(graph);
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DrawVerticalLabelArea(graph);
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DrawXLabelBack(graph);
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DrawBars(graph);
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DrawXLabelArea(graph);
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if (ShowLegend)
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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(_fontColor);
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valFont = new Font(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 (RenderMode == BarGraphRenderMode.Lines)
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linePoints = new PointF[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(_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 DataPoints)
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using (SolidBrush barBrush = new SolidBrush(item.ItemColor))
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{
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float itemY = _yOrigin + _graphHeight - item.SweepSize;
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if (RenderMode == BarGraphRenderMode.Lines)
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{
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linePoints[pointIndex++] = new PointF(_xOrigin + item.StartPos + _barWidth / 2, itemY);
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}
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else if (RenderMode == BarGraphRenderMode.Bars)
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{
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float ox = _xOrigin + item.StartPos;
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float oy = itemY;
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float ow = _barWidth;
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float oh = item.SweepSize;
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float of = 9.5f;
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PointF[] pts =
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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[] { pts[2], pts[3], pts[6], pts[5] });
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using (SolidBrush ltBrsh = new SolidBrush(ControlPaint.Light(item.ItemColor, 0.1f)))
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{
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graph.FillPolygon(ltBrsh, new[] { pts[0], pts[2], pts[5], pts[4] });
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}
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using (SolidBrush drkBrush = new SolidBrush(ControlPaint.Dark(item.ItemColor, 0.05f)))
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{
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graph.FillPolygon(drkBrush, new[] { pts[0], pts[1], pts[3], pts[2] });
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}
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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 (ShowData && i % _interval == 0)
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{
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float sectionWidth = _barWidth + _spaceBtwBars;
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float startX =
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_xOrigin + i * sectionWidth +
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sectionWidth / 2; // This draws the value on center of the bar
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float startY =
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itemY - 2f - valFont.Height; // Positioned on top of each bar by 2 pixels
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RectangleF recVal = new RectangleF(startX - sectionWidth * _interval / 2, startY,
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sectionWidth * _interval, valFont.Height);
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SizeF sz = graph.MeasureString(item.Value.ToString("#,###.##"), valFont, recVal.Size,
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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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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,
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recVal.Height);
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, whiteBrsh, rco,
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sfFormat);
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}
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, brsFont, recVal,
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sfFormat);
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}
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}
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i++;
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}
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if (RenderMode == BarGraphRenderMode.Lines)
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{
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if (linePoints.Length >= 2)
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using (Pen linePen = new Pen(Color.FromArgb(220, Color.Red), 2.5f))
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{
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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, _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],
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new PointF(linePoints[j].X, _yOrigin + _graphHeight));
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DataItem item = DataPoints[j];
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float itemY = _yOrigin + _graphHeight - item.SweepSize;
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// Draw data value
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if (ShowData && j % _interval == 0)
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{
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graph.FillEllipse(brsFont,
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new RectangleF(linePoints[j].X - 2.0f, linePoints[j].Y - 2.0f, 4.0f, 4.0f));
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float sectionWidth = _barWidth + _spaceBtwBars;
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float startX =
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_xOrigin + j * sectionWidth +
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sectionWidth / 2; // This draws the value on center of the bar
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float startY =
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itemY - 2f - valFont.Height; // Positioned on top of each bar by 2 pixels
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RectangleF recVal = new RectangleF(startX - sectionWidth * _interval / 2, startY,
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sectionWidth * _interval, valFont.Height);
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SizeF sz = graph.MeasureString(item.Value.ToString("#,###.##"), valFont, recVal.Size,
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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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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,
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recVal.Height);
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, whiteBrsh, rco,
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sfFormat);
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}
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graph.DrawString(item.Value.ToString("#,###.##"), valFont, brsFont, recVal,
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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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brsFont?.Dispose();
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valFont?.Dispose();
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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 = _yTitle == null ? 0.0f : 20.0f;
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try
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{
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brs = new SolidBrush(_fontColor);
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lblFormat = new StringFormat();
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pen = new Pen(_fontColor);
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if (_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(FontFamily, _labelFontSize + 4.0f);
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graph.DrawString(_yTitle, lblFont, brs, new RectangleF(0.0f, _yOrigin, 20.0f, _graphHeight), sfVLabel);
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lblFont.Dispose();
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}
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sfVLabel = new StringFormat();
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lblFormat.Alignment = StringAlignment.Far;
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lblFormat.FormatFlags |= StringFormatFlags.NoClip;
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// Draw vertical label at the top of y-axis and place it in the middle top of y-axis
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lblFont = new Font(FontFamily, _labelFontSize + 2.0f, FontStyle.Bold);
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RectangleF recVLabel =
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new RectangleF(0, _yOrigin - 2 * _spacer - lblFont.Height, _xOrigin * 2, lblFont.Height);
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sfVLabel.Alignment = StringAlignment.Center;
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sfVLabel.FormatFlags |= StringFormatFlags.NoClip;
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//graph.DrawRectangle(Pens.Black,Rectangle.Truncate(recVLabel));
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graph.DrawString(VerticalLabel, lblFont, brs, recVLabel, sfVLabel);
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lblFont.Dispose();
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lblFont = new Font(FontFamily, _labelFontSize);
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// Draw all tick values and tick marks
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using (Pen smallPen = new Pen(Color.FromArgb(96, _fontColor), 0.8f))
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{
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for (int i = 0; i < VerticalTickCount; i++)
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{
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float currentY = _topBuffer + i * _yTickValue / _scaleFactor; // Position for tick mark
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float labelY = currentY - lblFont.Height / 2; // Place label in the middle of tick
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RectangleF lblRec = new RectangleF(_spacer + fo - 6, labelY, _maxTickValueWidth, lblFont.Height);
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float currentTick = _maxValue - i * _yTickValue; // Calculate tick value from top to bottom
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graph.DrawString(currentTick.ToString("#,###.##"), lblFont, brs, lblRec,
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lblFormat); // Draw tick value
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graph.DrawLine(pen, _xOrigin, currentY, _xOrigin - 4.0f, currentY); // Draw tick mark
|
|
|
|
graph.DrawLine(smallPen, _xOrigin, currentY, _xOrigin + _graphWidth, currentY);
|
|
}
|
|
}
|
|
|
|
// Draw y axis
|
|
graph.DrawLine(pen, _xOrigin, _yOrigin, _xOrigin, _yOrigin + _graphHeight);
|
|
}
|
|
finally
|
|
{
|
|
lblFont?.Dispose();
|
|
brs?.Dispose();
|
|
lblFormat?.Dispose();
|
|
pen?.Dispose();
|
|
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(FontFamily, _labelFontSize);
|
|
brs = new SolidBrush(_fontColor);
|
|
lblFormat = new StringFormat();
|
|
pen = new Pen(_fontColor);
|
|
|
|
lblFormat.Alignment = StringAlignment.Center;
|
|
|
|
// Draw x axis
|
|
graph.DrawLine(pen, _xOrigin, _yOrigin + _graphHeight, _xOrigin + _graphWidth, _yOrigin + _graphHeight);
|
|
}
|
|
finally
|
|
{
|
|
lblFont?.Dispose();
|
|
brs?.Dispose();
|
|
lblFormat?.Dispose();
|
|
pen?.Dispose();
|
|
}
|
|
}
|
|
|
|
private void DrawXLabelArea(Graphics graph)
|
|
{
|
|
Font lblFont = null;
|
|
SolidBrush brs = null;
|
|
StringFormat lblFormat = null;
|
|
Pen pen = null;
|
|
|
|
try
|
|
{
|
|
brs = new SolidBrush(_fontColor);
|
|
pen = new Pen(_fontColor);
|
|
|
|
if (_xTitle != null)
|
|
{
|
|
lblFormat = new StringFormat();
|
|
lblFormat.Alignment = StringAlignment.Center;
|
|
lblFormat.LineAlignment = StringAlignment.Center;
|
|
// sfVLabel.FormatFlags=StringFormatFlags.DirectionVertical;
|
|
|
|
lblFont = new Font(FontFamily, _labelFontSize + 2.0f, FontStyle.Bold);
|
|
graph.DrawString(_xTitle, lblFont, brs,
|
|
new RectangleF(_xOrigin,
|
|
_yOrigin + _graphHeight + 14.0f + (RenderMode == BarGraphRenderMode.Bars ? 10.0f : 0.0f) +
|
|
(DataPoints.Count / _interval > 24 ? 16.0f : 0.0f), _graphWidth, 20.0f), lblFormat);
|
|
}
|
|
|
|
lblFont = new Font(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 (RenderMode == BarGraphRenderMode.Bars)
|
|
{
|
|
of = 10.0f;
|
|
|
|
// Draw x axis
|
|
graph.DrawLine(pen, _xOrigin + of, _yOrigin + _graphHeight + of, _xOrigin + _graphWidth + of,
|
|
_yOrigin + _graphHeight + of);
|
|
|
|
graph.DrawLine(pen, _xOrigin, _yOrigin + _graphHeight, _xOrigin + of, _yOrigin + _graphHeight + of);
|
|
graph.DrawLine(pen, _xOrigin + _graphWidth, _yOrigin + _graphHeight, _xOrigin + of + _graphWidth,
|
|
_yOrigin + _graphHeight + of);
|
|
}
|
|
|
|
float currentX;
|
|
float currentY = _yOrigin + _graphHeight + 2.0f; // All x labels are drawn 2 pixels below x-axis
|
|
float labelWidth = _barWidth + _spaceBtwBars; // Fits exactly below the bar
|
|
int i = 0;
|
|
|
|
// Draw x labels
|
|
foreach (DataItem item in DataPoints)
|
|
{
|
|
if (i % _interval == 0)
|
|
{
|
|
currentX = _xOrigin + i * labelWidth + of + labelWidth / 2;
|
|
RectangleF recLbl = new RectangleF(currentX - labelWidth * _interval / 2, currentY + of,
|
|
labelWidth * _interval, lblFont.Height * 2);
|
|
string lblString = ShowLegend ? item.Label : item.Description; // Decide what to show: short or long
|
|
|
|
graph.DrawString(lblString, lblFont, brs, recLbl, lblFormat);
|
|
}
|
|
|
|
i++;
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
lblFont?.Dispose();
|
|
brs?.Dispose();
|
|
lblFormat?.Dispose();
|
|
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(FontFamily, _legendFontSize);
|
|
brs = new SolidBrush(_fontColor);
|
|
lblFormat = new StringFormat();
|
|
pen = new Pen(_fontColor);
|
|
lblFormat.Alignment = StringAlignment.Near;
|
|
|
|
// Calculate Legend drawing start point
|
|
float startX = _xOrigin + _graphWidth + _graphLegendSpacer;
|
|
float startY = _yOrigin;
|
|
|
|
float xColorCode = startX + _spacer;
|
|
float xLegendText = xColorCode + _legendRectangleSize + _spacer;
|
|
float legendHeight = 0.0f;
|
|
for (int i = 0; i < DataPoints.Count; i++)
|
|
{
|
|
DataItem point = 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(DataPoints[i].ItemColor))
|
|
{
|
|
graph.FillRectangle(brsh, xColorCode, currentY + 3f, _legendRectangleSize, _legendRectangleSize);
|
|
}
|
|
}
|
|
|
|
// Draw legend border
|
|
graph.DrawRectangle(pen, startX, startY, _legendWidth, legendHeight + _spacer);
|
|
}
|
|
finally
|
|
{
|
|
lblFont?.Dispose();
|
|
brs?.Dispose();
|
|
lblFormat?.Dispose();
|
|
pen?.Dispose();
|
|
}
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method calculates all measurement aspects of the bar graph from the given data points
|
|
//
|
|
//*********************************************************************
|
|
|
|
private void CalculateGraphDimension()
|
|
{
|
|
FindLongestTickValue();
|
|
|
|
// Need to add another character for spacing; this is not used for drawing, just for calculation
|
|
_longestTickValue += "0";
|
|
//_maxTickValueWidth = CalculateImgFontWidth(_longestTickValue, _labelFontSize, FontFamily);
|
|
_maxTickValueWidth = 0.0f;
|
|
|
|
|
|
float currentTick;
|
|
string tickString;
|
|
for (int i = 0; i < VerticalTickCount; i++)
|
|
{
|
|
currentTick = _maxValue - i * _yTickValue;
|
|
tickString = currentTick.ToString("#,###.##");
|
|
|
|
float measured = CalculateImgFontWidth(tickString, _labelFontSize, FontFamily);
|
|
|
|
if (measured > _maxTickValueWidth)
|
|
_maxTickValueWidth = measured;
|
|
}
|
|
|
|
float leftOffset = _spacer + _maxTickValueWidth + (_yTitle == null ? 0.0f : 20.0f);
|
|
float rtOffset = 0.0f;
|
|
|
|
if (ShowLegend)
|
|
{
|
|
_legendWidth = _spacer + _legendRectangleSize + _spacer + _maxLabelWidth + _spacer;
|
|
rtOffset = _graphLegendSpacer + _legendWidth + _spacer;
|
|
}
|
|
else
|
|
{
|
|
rtOffset = _spacer; // Make graph in the middle
|
|
}
|
|
|
|
if (RenderMode == BarGraphRenderMode.Bars)
|
|
rtOffset += 10.0f;
|
|
|
|
rtOffset += 10.0f;
|
|
|
|
_graphHeight =
|
|
_totalHeight - _topBuffer - _bottomBuffer -
|
|
(_xTitle == null ? 0.0f : 20.0f); // Buffer spaces are used to print labels
|
|
_graphWidth = _totalWidth - leftOffset - rtOffset;
|
|
_xOrigin = leftOffset;
|
|
_yOrigin = _topBuffer;
|
|
|
|
// Once the correct _maxValue is determined, then calculate _scaleFactor
|
|
_scaleFactor = _maxValue / _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 < VerticalTickCount; i++)
|
|
{
|
|
currentTick = _maxValue - i * _yTickValue;
|
|
tickString = currentTick.ToString("#,###.##");
|
|
if (_longestTickValue.Length < tickString.Length)
|
|
_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
|
|
{
|
|
graph?.Dispose();
|
|
bmp?.Dispose();
|
|
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
|
|
_maxValue *= 1.1f;
|
|
|
|
if (_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(_maxValue)));
|
|
tempMax = Convert.ToSingle(Math.Ceiling(_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
|
|
_yTickValue = tempMax / VerticalTickCount;
|
|
double expTick = Convert.ToDouble(Math.Floor(Math.Log10(_yTickValue)));
|
|
_yTickValue = Convert.ToSingle(Math.Ceiling(_yTickValue / Math.Pow(10, expTick)) * Math.Pow(10, expTick));
|
|
|
|
// Re-calculate the max value with the new tick value
|
|
_maxValue = _yTickValue * VerticalTickCount;
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// 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 DataPoints)
|
|
{
|
|
// This implementation does not support negative value
|
|
if (item.Value >= 0) item.SweepSize = item.Value / _scaleFactor;
|
|
|
|
// (_spaceBtwBars/2) makes half white space for the first bar
|
|
item.StartPos = _spaceBtwBars / 2 + i * (_barWidth + _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
|
|
_barWidth = barGraphWidth / (dataCount * 2); // Each bar has 1 white space
|
|
//_barWidth =/* (float)Math.Floor(*/_barWidth/*)*/;
|
|
_spaceBtwBars = _barWidth;
|
|
}
|
|
|
|
//*********************************************************************
|
|
//
|
|
// This method assigns default value to the bar graph properties and is only
|
|
// called from BarGraph constructors
|
|
//
|
|
//*********************************************************************
|
|
|
|
private void AssignDefaultSettings()
|
|
{
|
|
// default values
|
|
_totalWidth = 680f;
|
|
_totalHeight = 450f;
|
|
FontFamily = "Verdana";
|
|
_backColor = Color.White;
|
|
_fontColor = Color.Black;
|
|
_topBuffer = 30f;
|
|
_bottomBuffer = 30f;
|
|
VerticalTickCount = 2;
|
|
ShowLegend = false;
|
|
ShowData = false;
|
|
}
|
|
}
|
|
} |