<html><head><link rel=stylesheet href=style.css></head><body><div class=SourcePanel style='font-size:12'><pre style='background-color:white'>
<font color= "blue">using</font> System;
<font color= "blue">using</font> System.Drawing;
<font color= "blue">using</font> System.Collections;
<font color= "blue">using</font> System.Drawing.Imaging;
<font color= "blue">using</font> System.Drawing.Drawing2D;
<font color= "blue"></font>
<font color= "blue">namespace</font> ASPNET.StarterKit.Chart
<font color= "blue"></font>{
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // BarGraph Class</font>
<font color= "green"> //</font>
<font color= "green"> // This class uses GDI+ to render Bar Chart.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> public class</font> BarGraph : Chart
<font color= "blue"> </font>{
<font color= "blue"> private const </font>float _graphLegendSpacer = 15F;
<font color= "blue"> private const </font>int _labelFontSize = 7;
<font color= "blue"> private const </font>int _legendFontSize = 9;
<font color= "blue"> private const </font>float _legendRectangleSize = 10F;
<font color= "blue"> private const </font>float _spacer = 5F;
<font color= "blue"></font>
<font color= "green"> // Overall related members</font>
<font color= "blue"> private </font>Color _backColor;
<font color= "blue"> private </font>string _fontFamily;
<font color= "blue"> private </font>string _longestTickValue = string.Empty; // Used to calculate max value width
<font color= "blue"> private </font>float _maxTickValueWidth; // Used to calculate left offset of bar graph
<font color= "blue"> private </font>float _totalHeight;
<font color= "blue"> private </font>float _totalWidth;
<font color= "blue"> </font>
<font color= "green"> // Graph related members</font>
<font color= "blue"> private </font>float _barWidth;
<font color= "blue"> private </font>float _bottomBuffer; // Space from bottom to x axis
<font color= "blue"> private </font>bool _displayBarData;
<font color= "blue"> private </font>Color _fontColor;
<font color= "blue"> private </font>float _graphHeight;
<font color= "blue"> private </font>float _graphWidth;
<font color= "blue"> private </font>float _maxValue = 0.0f; // = final tick value * tick count
<font color= "blue"> private </font>float _scaleFactor; // = _maxValue / _graphHeight
<font color= "blue"> private </font>float _spaceBtwBars; // For now same as _barWidth
<font color= "blue"> private </font>float _topBuffer; // Space from top to the top of y axis
<font color= "blue"> private </font>float _xOrigin; // x position where graph starts drawing
<font color= "blue"> private </font>float _yOrigin; // y position where graph starts drawing
<font color= "blue"> private </font>string _yLabel;
<font color= "blue"> private </font>int _yTickCount;
<font color= "blue"> private </font>float _yTickValue; // Value for each tick = _maxValue/_yTickCount
<font color= "blue"></font>
<font color= "green"> // Legend related members</font>
<font color= "blue"> private </font>bool _displayLegend;
<font color= "blue"> private </font>float _legendWidth;
<font color= "blue"> private </font>string _longestLabel = string.Empty; // Used to calculate legend width
<font color= "blue"> private </font>float _maxLabelWidth = 0.0f;
<font color= "blue"></font>
<font color= "blue"> public </font>string FontFamily {
<font color= "blue"> </font>get{ return _fontFamily; }
<font color= "blue"> </font>set{ _fontFamily = value; }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>Color BackgroundColor {
<font color= "blue"> </font>set{ _backColor = value; }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>int BottomBuffer {
<font color= "blue"> set</font> { _bottomBuffer = Convert.ToSingle(value); }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>Color FontColor {
<font color= "blue"> </font>set{ _fontColor = value; }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>int Height {
<font color= "blue"> </font>get{ return Convert.ToInt32(_totalHeight); }
<font color= "blue"> </font>set{ _totalHeight = Convert.ToSingle(value); }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>int Width {
<font color= "blue"> </font>get{ return Convert.ToInt32(_totalWidth); }
<font color= "blue"> </font>set{ _totalWidth = Convert.ToSingle(value); }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>bool ShowLegend {
<font color= "blue"> </font>get{ return _displayLegend; }
<font color= "blue"> </font>set{ _displayLegend = value; }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>bool ShowData {
<font color= "blue"> </font>get{ return _displayBarData; }
<font color= "blue"> </font>set{ _displayBarData = value; }
<font color= "blue"> </font>}
<font color= "blue"> public </font>int TopBuffer {
<font color= "blue"> set</font> { _topBuffer = Convert.ToSingle(value); }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>string VerticalLabel {
<font color= "blue"> </font>get{ return _yLabel; }
<font color= "blue"> </font>set{ _yLabel = value; }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>int VerticalTickCount {
<font color= "blue"> </font>get{ return _yTickCount; }
<font color= "blue"> </font>set{ _yTickCount = value; }
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>BarGraph()
<font color= "blue"> </font>{
<font color= "blue"> </font>AssignDefaultSettings();
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> public </font>BarGraph(Color bgColor)
<font color= "blue"> </font>{
<font color= "blue"> </font>AssignDefaultSettings();
<font color= "blue"> </font>BackgroundColor = bgColor;
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method collects all data points and calculate all the necessary dimensions </font>
<font color= "green"> // to draw the bar graph. It is the method called before invoking the Draw() method.</font>
<font color= "green"> // labels is the x values.</font>
<font color= "green"> // values is the y values.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> public void</font> CollectDataPoints(string[] labels, string[] values)
<font color= "blue"> </font>{
<font color= "blue"></font><font color= "blue"> if </font>(labels.Length == values.Length) <font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "blue"> </font>for(int i=0; i<labels.Length; i++)
<font color= "blue"> </font>{
<font color= "blue"> </font>float temp = Convert.ToSingle(values[i]);
<font color= "blue"> </font>string shortLbl = MakeShortLabel(labels[i]);
<font color= "blue"></font>
<font color= "green"> // For now put 0.0 for start position and sweep size</font>
<font color= "blue"> </font>DataPoints.Add(new ChartItem(shortLbl, labels[i], temp, 0.0f, 0.0f, GetColor(i)));
<font color= "blue"> </font>
<font color= "green"> // Find max value from data; this is only temporary _maxValue</font>
<font color= "blue"></font><font color= "blue"> if </font>(_maxValue < temp) _maxValue = temp;<font color= "blue"></font>
<font color= "blue"></font>
<font color= "green"> // Find the longest description</font>
<font color= "blue"></font><font color= "blue"> if </font>(_displayLegend) <font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "blue"> </font>string currentLbl = labels[i] + " (" + shortLbl + ")";
<font color= "blue"> </font>float currentWidth = CalculateImgFontWidth(currentLbl, _legendFontSize, FontFamily);
<font color= "blue"></font><font color= "blue"> if</font>(_maxLabelWidth < currentWidth)<font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "blue"> </font>_longestLabel = currentLbl;
<font color= "blue"> </font>_maxLabelWidth = currentWidth;
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "blue"> </font>CalculateTickAndMax();
<font color= "blue"> </font>CalculateGraphDimension();
<font color= "blue"> </font>CalculateBarWidth(DataPoints.Count, _graphWidth);
<font color= "blue"> </font>CalculateSweepValues();
<font color= "blue"> </font>}
<font color= "blue"></font><font color= "blue"> else</font><font color= "blue"></font>
<font color= "blue"> </font>throw new Exception("X data count is different from Y data count");
<font color= "blue"> </font>}
<font color= "blue"> </font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // Same as above; called when user doesn't care about the x values</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> public void</font> CollectDataPoints(string[] values)
<font color= "blue"> </font>{
<font color= "blue"> </font>string[] labels = values;
<font color= "blue"> </font>CollectDataPoints(labels, values);
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method returns a bar graph bitmap to the calling function. It is called after </font>
<font color= "green"> // all dimensions and data points are calculated.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> public </font>override Bitmap Draw()
<font color= "blue"> </font>{
<font color= "blue"> </font>int height = Convert.ToInt32(_totalHeight);
<font color= "blue"> </font>int width = Convert.ToInt32(_totalWidth);
<font color= "blue"></font>
<font color= "blue"> </font>Bitmap bmp = new Bitmap(width, height);
<font color= "blue"> </font>Graphics graph = Graphics.FromImage(bmp);
<font color= "blue"> </font>graph.CompositingQuality = CompositingQuality.HighQuality;
<font color= "blue"> </font>graph.SmoothingMode = SmoothingMode.AntiAlias;
<font color= "blue"></font>
<font color= "green"> // Set the background: need to draw one pixel larger than the bitmap to cover all area</font>
<font color= "blue"> </font>graph.FillRectangle(new SolidBrush(_backColor), -1, -1, bmp.Width+1, bmp.Height+1);
<font color= "blue"></font>
<font color= "blue"> </font>DrawVerticalLabelArea(graph);
<font color= "blue"> </font>DrawBars(graph);
<font color= "blue"> </font>DrawXLabelArea(graph);
<font color= "blue"></font><font color= "blue"> if </font>(_displayLegend) DrawLegend(graph);<font color= "blue"></font>
<font color= "blue"></font>
<font color= "blue"> </font>graph.Dispose();
<font color= "blue"></font>
<font color= "blue"> return</font> bmp;
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method draws all the bars for the graph.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> DrawBars(Graphics graph)
<font color= "blue"> </font>{
<font color= "blue"> </font>SolidBrush brsFont = new SolidBrush(_fontColor);
<font color= "blue"> </font>Font valFont = new Font(_fontFamily, _labelFontSize);
<font color= "blue"> </font>StringFormat sfFormat = new StringFormat();
<font color= "blue"> </font>sfFormat.Alignment = StringAlignment.Center;
<font color= "blue"> </font>int i = 0;
<font color= "blue"></font>
<font color= "green"> // Draw bars and the value above each bar</font>
<font color= "blue"> </font>foreach(ChartItem item in DataPoints)
<font color= "blue"> </font>{
<font color= "blue"> </font>SolidBrush barBrush = new SolidBrush(item.ItemColor);
<font color= "blue"> </font>float itemY = _yOrigin + _graphHeight - item.SweepSize;
<font color= "blue"></font>
<font color= "green"> // When drawing, all position is relative to (_xOrigin, _yOrigin)</font>
<font color= "blue"> </font>graph.FillRectangle(barBrush, _xOrigin + item.StartPos, itemY, _barWidth, item.SweepSize);
<font color= "blue"></font>
<font color= "green"> // Draw data value</font>
<font color= "blue"></font><font color= "blue"> if </font>(_displayBarData)<font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "blue"> </font>float startX = _xOrigin + (i * (_barWidth + _spaceBtwBars)); // This draws the value on center of the bar
<font color= "blue"> </font>float startY = itemY - 2f - valFont.Height; // Positioned on top of each bar by 2 pixels
<font color= "blue"> </font>RectangleF recVal = new RectangleF(startX, startY, _barWidth + _spaceBtwBars, valFont.Height);
<font color= "blue"> </font>graph.DrawString(item.Value.ToString("#,###.##"), valFont, brsFont, recVal, sfFormat);
<font color= "blue"> </font>}
<font color= "blue"> </font>i++;
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method draws the y label, tick marks, tick values, and the y axis.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> DrawVerticalLabelArea(Graphics graph)
<font color= "blue"> </font>{
<font color= "blue"> </font>Font lblFont = new Font(_fontFamily, _labelFontSize);
<font color= "blue"> </font>SolidBrush brs = new SolidBrush(_fontColor);
<font color= "blue"> </font>StringFormat lblFormat = new StringFormat();
<font color= "blue"> </font>lblFormat.Alignment = StringAlignment.Near;
<font color= "blue"> </font>Pen pen = new Pen(_fontColor);
<font color= "blue"></font>
<font color= "green"> // Draw vertical label at the top of y-axis and place it in the middle top of y-axis</font>
<font color= "blue"> </font>RectangleF recVLabel = new RectangleF(0f, _yOrigin-2*_spacer-lblFont.Height, _xOrigin*2, lblFont.Height);
<font color= "blue"> </font>StringFormat sfVLabel = new StringFormat();
<font color= "blue"> </font>sfVLabel.Alignment = StringAlignment.Center;
<font color= "blue"> </font>graph.DrawString(_yLabel, lblFont, brs, recVLabel, sfVLabel);
<font color= "blue"></font>
<font color= "green"> // Draw all tick values and tick marks</font>
<font color= "blue"> for</font> (int i=0; i<_yTickCount; i++)
<font color= "blue"> </font>{
<font color= "blue"> </font>float currentY = _topBuffer + (i * _yTickValue/_scaleFactor); // Position for tick mark
<font color= "blue"> </font>float labelY = currentY-lblFont.Height/2; // Place label in the middle of tick
<font color= "blue"> </font>RectangleF lblRec = new RectangleF(_spacer, labelY, _maxTickValueWidth, lblFont.Height);
<font color= "blue"> </font>float currentTick = _maxValue - i*_yTickValue; // Calculate tick value from top to bottom
<font color= "blue"></font>
<font color= "blue"> </font>graph.DrawString(currentTick.ToString("#,###.##"), lblFont, brs, lblRec, lblFormat); // Draw tick value
<font color= "blue"> </font>graph.DrawLine(pen, _xOrigin, currentY, _xOrigin - 4.0f, currentY); // Draw tick mark
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> // Draw y axis</font>
<font color= "blue"> </font>graph.DrawLine(pen, _xOrigin, _yOrigin, _xOrigin, _yOrigin + _graphHeight);
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method draws x axis and all x labels</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> DrawXLabelArea(Graphics graph)
<font color= "blue"> </font>{
<font color= "blue"> </font>Font lblFont = new Font(_fontFamily, _labelFontSize);
<font color= "blue"> </font>SolidBrush brs = new SolidBrush(_fontColor);
<font color= "blue"> </font>StringFormat lblFormat = new StringFormat();
<font color= "blue"> </font>lblFormat.Alignment = StringAlignment.Center;
<font color= "blue"> </font>Pen pen = new Pen(_fontColor);
<font color= "blue"></font>
<font color= "green"> // Draw x axis</font>
<font color= "blue"> </font>graph.DrawLine(pen, _xOrigin, _yOrigin + _graphHeight, _xOrigin + _graphWidth, _yOrigin + _graphHeight);
<font color= "blue"></font>
<font color= "blue"> </font>float currentX;
<font color= "blue"> </font>float currentY = _yOrigin + _graphHeight + 2.0f; // All x labels are drawn 2 pixels below x-axis
<font color= "blue"> </font>float labelWidth = _barWidth + _spaceBtwBars; // Fits exactly below the bar
<font color= "blue"> </font>int i = 0;
<font color= "blue"></font>
<font color= "green"> // Draw x labels</font>
<font color= "blue"> </font>foreach(ChartItem item in DataPoints)
<font color= "blue"> </font>{
<font color= "blue"> </font>currentX = _xOrigin + (i * labelWidth);
<font color= "blue"> </font>RectangleF recLbl = new RectangleF(currentX, currentY, labelWidth, lblFont.Height);
<font color= "blue"> </font>string lblString = _displayLegend ? item.Label : item.Description; // Decide what to show: short or long
<font color= "blue"></font>
<font color= "blue"> </font>graph.DrawString(lblString, lblFont, brs, recLbl, lblFormat);
<font color= "blue"> </font>i++;
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method determines where to place the legend box.</font>
<font color= "green"> // It draws the legend border, legend description, and legend color code.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> DrawLegend(Graphics graph)
<font color= "blue"> </font>{
<font color= "blue"> </font>Font lblFont = new Font(_fontFamily, _legendFontSize);
<font color= "blue"> </font>SolidBrush brs = new SolidBrush(_fontColor);
<font color= "blue"> </font>StringFormat lblFormat = new StringFormat();
<font color= "blue"> </font>lblFormat.Alignment = StringAlignment.Near;
<font color= "blue"> </font>Pen pen = new Pen(_fontColor);
<font color= "blue"></font>
<font color= "green"> // Calculate Legend drawing start point</font>
<font color= "blue"> </font>float startX = _xOrigin + _graphWidth + _graphLegendSpacer;
<font color= "blue"> </font>float startY = _yOrigin;
<font color= "blue"></font>
<font color= "blue"> </font>float xColorCode = startX + _spacer;
<font color= "blue"> </font>float xLegendText = xColorCode + _legendRectangleSize + _spacer;
<font color= "blue"> </font>float legendHeight = 0.0f;
<font color= "blue"> </font>for(int i=0; i<DataPoints.Count; i++)
<font color= "blue"> </font>{
<font color= "blue"> </font>ChartItem point = DataPoints[i];
<font color= "blue"> </font>string text = point.Description + " (" + point.Label + ")";
<font color= "blue"> </font>float currentY = startY + _spacer + (i * (lblFont.Height + _spacer));
<font color= "blue"> </font>legendHeight += lblFont.Height + _spacer;
<font color= "blue"></font>
<font color= "green"> // Draw legend description</font>
<font color= "blue"> </font>graph.DrawString(text, lblFont, brs, xLegendText, currentY, lblFormat);
<font color= "blue"></font>
<font color= "green"> // Draw color code</font>
<font color= "blue"> </font>graph.FillRectangle(new SolidBrush(DataPoints[i].ItemColor), xColorCode, currentY + 3f, _legendRectangleSize, _legendRectangleSize);
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> // Draw legend border</font>
<font color= "blue"> </font>graph.DrawRectangle(pen, startX, startY, _legendWidth, legendHeight + _spacer);
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method calculates all measurement aspects of the bar graph from the given data points</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> CalculateGraphDimension()
<font color= "blue"> </font>{
<font color= "blue"> </font>FindLongestTickValue();
<font color= "blue"> </font>
<font color= "green"> // Need to add another character for spacing; this is not used for drawing, just for calculation</font>
<font color= "blue"> </font>_longestTickValue += "0";
<font color= "blue"> </font>_maxTickValueWidth = CalculateImgFontWidth(_longestTickValue, _labelFontSize, FontFamily);
<font color= "blue"> </font>float leftOffset = _spacer + _maxTickValueWidth;
<font color= "blue"> </font>float rtOffset = 0.0f;
<font color= "blue"></font>
<font color= "blue"></font><font color= "blue"> if </font>(_displayLegend) <font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "blue"> </font>_legendWidth = _spacer + _legendRectangleSize + _spacer + _maxLabelWidth + _spacer;
<font color= "blue"> </font>rtOffset = _graphLegendSpacer + _legendWidth + _spacer;
<font color= "blue"> </font>}
<font color= "blue"></font><font color= "blue"> else</font><font color= "blue"></font>
<font color= "blue"> </font>rtOffset = _spacer; // Make graph in the middle
<font color= "blue"></font>
<font color= "blue"> </font>_graphHeight = _totalHeight - _topBuffer - _bottomBuffer; // Buffer spaces are used to print labels
<font color= "blue"> </font>_graphWidth = _totalWidth - leftOffset - rtOffset;
<font color= "blue"> </font>_xOrigin = leftOffset;
<font color= "blue"> </font>_yOrigin = _topBuffer;
<font color= "blue"></font>
<font color= "green"> // Once the correct _maxValue is determined, then calculate _scaleFactor</font>
<font color= "blue"> </font>_scaleFactor = _maxValue / _graphHeight;
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method determines the longest tick value from the given data points.</font>
<font color= "green"> // The result is needed to calculate the correct graph dimension.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> FindLongestTickValue()
<font color= "blue"> </font>{
<font color= "blue"> </font>float currentTick;
<font color= "blue"> </font>string tickString;
<font color= "blue"> for</font> (int i=0; i<_yTickCount; i++)
<font color= "blue"> </font>{
<font color= "blue"> </font>currentTick = _maxValue - i*_yTickValue;
<font color= "blue"> </font>tickString = currentTick.ToString("#,###.##");
<font color= "blue"></font><font color= "blue"> if </font>(_longestTickValue.Length < tickString.Length)<font color= "blue"></font>
<font color= "blue"> </font>_longestTickValue = tickString;
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method calculates the image width in pixel for a given text</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private </font>float CalculateImgFontWidth(string text, int size, string family)
<font color= "blue"> </font>{
<font color= "blue"> </font>Bitmap bmp = null;
<font color= "blue"> </font>Graphics graph =null;
<font color= "blue"> </font>Font font = new Font(family, size);
<font color= "blue"></font>
<font color= "green"> // Calculate the size of the string.</font>
<font color= "blue"> </font>bmp = new Bitmap(1,1,PixelFormat.Format32bppArgb);
<font color= "blue"> </font>graph = Graphics.FromImage(bmp);
<font color= "blue"> </font>SizeF oSize = graph.MeasureString(text, font);
<font color= "blue"> </font>
<font color= "blue"> </font>graph.Dispose();
<font color= "blue"> </font>bmp.Dispose();
<font color= "blue"></font>
<font color= "blue"> return</font> oSize.Width;
<font color= "blue"> </font>}
<font color= "blue"> </font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method creates abbreviation from long description; used for making legend</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private </font>string MakeShortLabel(string text)
<font color= "blue"> </font>{
<font color= "blue"> </font>string label = text;
<font color= "blue"></font><font color= "blue"> if </font>(text.Length > 2) <font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "blue"> </font>int midPostition = Convert.ToInt32(Math.Floor(text.Length/2));
<font color= "blue"> </font>label = text.Substring(0,1) + text.Substring(midPostition, 1) + text.Substring(text.Length-1,1);
<font color= "blue"> </font>}
<font color= "blue"> return</font> label;
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method calculates the max value and each tick mark value for the bar graph.</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> CalculateTickAndMax()
<font color= "blue"> </font>{
<font color= "blue"> </font>float tempMax = 0.0f;
<font color= "blue"></font>
<font color= "green"> // Give graph some head room first about 10% of current max</font>
<font color= "blue"> </font>_maxValue *= 1.1f;
<font color= "blue"></font>
<font color= "blue"></font><font color= "blue"> if </font>(_maxValue != 0.0f)<font color= "blue"></font>
<font color= "blue"> </font>{
<font color= "green"> // Find a rounded value nearest to the current max value</font>
<font color= "green"> // Calculate this max first to give enough space to draw value on each bar</font>
<font color= "blue"> </font>double exp = Convert.ToDouble(Math.Floor(Math.Log10(_maxValue)));
<font color= "blue"> </font>tempMax = Convert.ToSingle(Math.Ceiling(_maxValue / Math.Pow(10, exp)) * Math.Pow(10, exp));
<font color= "blue"> </font>}
<font color= "blue"></font><font color= "blue"> else</font><font color= "blue"></font>
<font color= "blue"> </font>tempMax = 1.0f;
<font color= "blue"></font>
<font color= "green"> // Once max value is calculated, tick value can be determined; tick value should be a whole number</font>
<font color= "blue"> </font>_yTickValue = tempMax / _yTickCount;
<font color= "blue"> </font>double expTick = Convert.ToDouble(Math.Floor(Math.Log10(_yTickValue)));
<font color= "blue"> </font>_yTickValue = Convert.ToSingle(Math.Ceiling(_yTickValue / Math.Pow(10, expTick)) * Math.Pow(10, expTick));
<font color= "blue"></font>
<font color= "green"> // Re-calculate the max value with the new tick value</font>
<font color= "blue"> </font>_maxValue = _yTickValue * _yTickCount;
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method calculates the height for each bar in the graph</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> CalculateSweepValues()
<font color= "blue"> </font>{
<font color= "green"> // Called when all values and scale factor are known</font>
<font color= "green"> // All values calculated here are relative from (_xOrigin, _yOrigin)</font>
<font color= "blue"> </font>int i = 0;
<font color= "blue"> </font>foreach(ChartItem item in DataPoints)
<font color= "blue"> </font>{
<font color= "green"> // This implementation does not support negative value</font>
<font color= "blue"></font><font color= "blue"> if </font>(item.Value >= 0) item.SweepSize = item.Value/_scaleFactor;<font color= "blue"></font>
<font color= "blue"> </font>
<font color= "green"> // (_spaceBtwBars/2) makes half white space for the first bar</font>
<font color= "blue"> </font>item.StartPos = (_spaceBtwBars/2) + i * (_barWidth+_spaceBtwBars);
<font color= "blue"> </font>i++;
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method calculates the width for each bar in the graph</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> CalculateBarWidth(int dataCount, float barGraphWidth)
<font color= "blue"> </font>{
<font color= "green"> // White space between each bar is the same as bar width itself</font>
<font color= "blue"> </font>_barWidth = barGraphWidth / (dataCount * 2); // Each bar has 1 white space
<font color= "blue"> </font>_spaceBtwBars = _barWidth;
<font color= "blue"> </font>}
<font color= "blue"></font>
<font color= "green"> //*********************************************************************</font>
<font color= "green"> //</font>
<font color= "green"> // This method assigns default value to the bar graph properties and is only </font>
<font color= "green"> // called from BarGraph constructors</font>
<font color= "green"> //</font>
<font color= "green"> //*********************************************************************</font>
<font color= "blue"></font>
<font color= "blue"> private void</font> AssignDefaultSettings()
<font color= "blue"> </font>{
<font color= "green"> // default values</font>
<font color= "blue"> </font>_totalWidth = 700f;
<font color= "blue"> </font>_totalHeight = 450f;
<font color= "blue"> </font>_fontFamily = "Verdana";
<font color= "blue"> </font>_backColor = Color.White;
<font color= "blue"> </font>_fontColor = Color.Black;
<font color= "blue"> </font>_topBuffer = 30f;
<font color= "blue"> </font>_bottomBuffer = 30f;
<font color= "blue"> </font>_yTickCount = 2;
<font color= "blue"> </font>_displayLegend = false;
<font color= "blue"> </font>_displayBarData = false;
<font color= "blue"> </font>}
<font color= "blue"> </font>}
<font color= "blue"></font>}
</pre>
Submit an article or tip