private void Draw()
{
StringBuilder sb = new StringBuilder();
byte[][] defaultColourScheme;
int nClassesValue = 3;
string colourSchemeComboBoxSelection = colourSchemeComboBox.SelectedValue.ToString();
if (!_datasetModel.IsColourQualitative)
{
ComboBoxItem nClassesComboBoxSelection = (ComboBoxItem)numDataClassesComboBox.SelectedValue;
nClassesValue = int.Parse(nClassesComboBoxSelection.Content.ToString());
defaultColourScheme = _colourScheme.GetRGBColours(colourSchemeComboBoxSelection, nClassesValue);
}
else
{
_distinctCategories = _datasetModel.Dataset.Select(o => o[_colourValueIndex]).Distinct().ToList();
nClassesValue = _distinctCategories.Count();
defaultColourScheme = _colourScheme.GetRGBColours(colourSchemeComboBoxSelection, nClassesValue);
}
foreach (string[] row in _datasetModel.Dataset)
{
ParallelCoordsPolyline line = new ParallelCoordsPolyline();
line.ColourValue = row[_colourValueIndex];
sb.AppendLine(row[_idIndex]);
// Apply line colour
if (_datasetModel.IsColourQualitative)
{
int index = _distinctCategories.IndexOf(row[_colourValueIndex]);
line.LineColour = defaultColourScheme[index];
}
else
{
double colourValue = double.Parse(row[_colourValueIndex]);
double linearTransform = (colourValue - _datasetModel.ColourMinMax[0]) /
(_datasetModel.ColourMinMax[1] - _datasetModel.ColourMinMax[0]) * (nClassesValue - 1);
int colourIndex = (int)Math.Truncate(linearTransform);
line.LineColour = defaultColourScheme[colourIndex];
}
PointCollection points = new PointCollection();
double[] dataValues = new double[_axesIndexes.Length];
for (int i = 0; i < _axesIndexes.Length; i++)
{
// get value for the axis
double val = double.Parse(row[_axesIndexes[i]]);
dataValues[i] = val;
// get max/min values for the axis
string axisTitle = _datasetModel.ColumnHeadings[_axesIndexes[i]];
double[] minMax = _datasetModel.GetAxisMinMaxValues(axisTitle);
// get normalised value (between 0 and 1) and multiply
// by screen height to convert it into a screen coordinate
double yCoord = NormaliseValue(val, minMax[1], minMax[0]) * _canvasHeight;
double xCoord = _xSeparation * i;
points.Add(new Point(xCoord, yCoord));
sb.Append(_datasetModel.ColumnHeadings[_axesIndexes[i]]);
sb.Append(": ");
sb.AppendLine(val.ToString());
}
// colour value tooltip text
// check to see if the colour value is already an axis
if (Array.IndexOf(this.Axes, this.ColourValue) < 0)
{
// colour value is not an axis, add to the tooltip text
sb.Append(_datasetModel.ColumnHeadings[_colourValueIndex]);
sb.Append(": ");
sb.Append(row[_colourValueIndex]);
}
line.Details = sb.ToString();
sb.Clear();
line.PolylinePoints = points;
line.DataValues = dataValues;
_polylines.Add(line);
canvas.Children.Add(line);
}
// Assign event handlers at the end so events are not fired during initialisation
numDataClassesComboBox.SelectionChanged += numDataClassesComboBox_SelectionChanged;
colourSchemeTypeComboBox.SelectionChanged += colourSchemeTypeComboBox_SelectionChanged;
colourSchemeComboBox.SelectionChanged += colourSchemeComboBox_SelectionChanged;
}
private void Draw()
{
StringBuilder sb = new StringBuilder();
byte[][] defaultColourScheme;
int nClassesValue = 3;
string colourSchemeComboBoxSelection = colourSchemeComboBox.SelectedValue.ToString();
if (!_datasetModel.IsColourQualitative)
{
ComboBoxItem nClassesComboBoxSelection = (ComboBoxItem)numDataClassesComboBox.SelectedValue;
nClassesValue = int.Parse(nClassesComboBoxSelection.Content.ToString());
defaultColourScheme = _colourScheme.GetRGBColours(colourSchemeComboBoxSelection, nClassesValue);
}
else
{
_distinctCategories = _datasetModel.Dataset.Select(o => o[_colourValueIndex]).Distinct().ToList();
nClassesValue = _distinctCategories.Count();
defaultColourScheme = _colourScheme.GetRGBColours(colourSchemeComboBoxSelection, nClassesValue);
}
foreach (string[] row in _datasetModel.Dataset)
{
ParallelCoordsPolyline line = new ParallelCoordsPolyline();
line.ColourValue = row[_colourValueIndex];
sb.AppendLine(row[_idIndex]);
// Apply line colour
if (_datasetModel.IsColourQualitative)
{
int index = _distinctCategories.IndexOf(row[_colourValueIndex]);
line.LineColour = defaultColourScheme[index];
}
else
{
double colourValue = double.Parse(row[_colourValueIndex]);
double linearTransform = (colourValue - _datasetModel.ColourMinMax[0]) /
(_datasetModel.ColourMinMax[1] - _datasetModel.ColourMinMax[0]) * (nClassesValue - 1);
int colourIndex = (int)Math.Truncate(linearTransform);
line.LineColour = defaultColourScheme[colourIndex];
}
PointCollection points = new PointCollection();
double[] dataValues = new double[_axesIndexes.Length];
for (int i = 0; i < _axesIndexes.Length; i++)
{
// get value for the axis
double val = double.Parse(row[_axesIndexes[i]]);
dataValues[i] = val;
// get max/min values for the axis
string axisTitle = _datasetModel.ColumnHeadings[_axesIndexes[i]];
double[] minMax = _datasetModel.GetAxisMinMaxValues(axisTitle);
// get normalised value (between 0 and 1) and multiply
// by screen height to convert it into a screen coordinate
double yCoord = NormaliseValue(val, minMax[1], minMax[0]) * _canvasHeight;
double xCoord = _xSeparation * i;
points.Add(new Point(xCoord, yCoord));
sb.Append(_datasetModel.ColumnHeadings[_axesIndexes[i]]);
sb.Append(": ");
sb.AppendLine(val.ToString());
}
// colour value tooltip text
// check to see if the colour value is already an axis
if (Array.IndexOf(this.Axes, this.ColourValue) < 0)
{
// colour value is not an axis, add to the tooltip text
sb.Append(_datasetModel.ColumnHeadings[_colourValueIndex]);
sb.Append(": ");
sb.Append(row[_colourValueIndex]);
}
line.Details = sb.ToString();
sb.Clear();
line.PolylinePoints = points;
line.DataValues = dataValues;
_polylines.Add(line);
canvas.Children.Add(line);
}
// Assign event handlers at the end so events are not fired during initialisation
numDataClassesComboBox.SelectionChanged += numDataClassesComboBox_SelectionChanged;
colourSchemeTypeComboBox.SelectionChanged += colourSchemeTypeComboBox_SelectionChanged;
colourSchemeComboBox.SelectionChanged += colourSchemeComboBox_SelectionChanged;
}