private bool IsZoomEnable(DataRect rect)
{
bool res = true;
if (IsHorizontalNavigationEnabled)
{
double e_max = Math.Log(Math.Max(Math.Abs(rect.XMax), Math.Abs(rect.XMin)), 2);
double log = Math.Log(rect.Width, 2);
res = log > e_max - 40;
}
if (IsVerticalNavigationEnabled)
{
double e_max = Math.Log(Math.Max(Math.Abs(rect.YMax), Math.Abs(rect.YMin)), 2);
double log = Math.Log(rect.Height, 2);
res = res && log > e_max - 40;
}
return(res);
}
/// <summary>
/// Sets plot rectangle for current instance of <see cref="PlotBase"/>
/// </summary>
/// <param name="plotRect">plot rectangle value that would be set for current instance of <see cref="PlotBase"/></param>
/// <param name="fromAutoFit">Identifies that it is internal call</param>
protected void SetPlotRect(DataRect plotRect, bool fromAutoFit)
{
IsInternalChange = true;
EnumAll(p =>
{
p.PlotOriginX = plotRect.XMin;
p.PlotOriginY = plotRect.YMin;
p.PlotWidth = plotRect.Width;
p.PlotHeight = plotRect.Height;
if (!fromAutoFit)
{
p.IsAutoFitEnabled = false;
p.InvalidateMeasure();
}
});
IsInternalChange = false;
}
/// <summary>
/// Positions child elements and determines a size for a <see cref="Figure"/>.
/// </summary>
/// <param name="finalSize">The final area within the parent that Figure should use to arrange itself and its children.</param>
/// <returns>The actual size used.</returns>
protected override Size ArrangeOverride(Size finalSize)
{
finalSize.Width = Math.Min(finalSize.Width, DesiredSize.Width);
finalSize.Height = Math.Min(finalSize.Height, DesiredSize.Height);
// Arranging child elements
foreach (UIElement elt in Children)
{
Image img = elt as Image;
if (img != null)
{
Batch batch = img.Tag as Batch;
if (batch != null && batch.Image == elt) // Special algorithm for snapshot image
{
DataRect plotRect = batch.PlotRect;
var newLT = new Point(LeftFromX(plotRect.XMin), TopFromY(plotRect.YMax));
var newRB = new Point(LeftFromX(plotRect.XMax), TopFromY(plotRect.YMin));
batch.Image.Arrange(new Rect(newLT.X, newLT.Y, newRB.X - newLT.X, newRB.Y - newLT.Y));
}
else
{
elt.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
}
}
else
{
elt.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
}
}
if (ClipToBounds)
{
Clip = new RectangleGeometry
{
Rect = new Rect(new Point(0, 0), finalSize)
}
}
;
else
{
Clip = null;
}
return(finalSize);
}
private void OnTaskCompleted(RenderResult r, RenderTaskState state)
{
if (r != null && !state.IsCanceled)
{
WriteableBitmap wr = new WriteableBitmap((int)r.Output.Width, (int)r.Output.Height, 96, 96, PixelFormats.Bgra32, null);
// Calculate the number of bytes per pixel.
int bytesPerPixel = (wr.Format.BitsPerPixel + 7) / 8;
// Stride is bytes per pixel times the number of pixels.
// Stride is the byte width of a single rectangle row.
int stride = wr.PixelWidth * bytesPerPixel;
wr.WritePixels(new Int32Rect(0, 0, wr.PixelWidth, wr.PixelHeight), r.Image, stride, 0);
outputImage.Source = wr;
Canvas.SetLeft(outputImage, r.Output.Left);
Canvas.SetTop(outputImage, r.Output.Top);
imageCartesianRect = r.Visible;
imageSize = new Size(r.Output.Width, r.Output.Height);
outputImage.RenderTransform = null;
}
RaiseTaskCompletion(state.Id);
runningTasks.Remove(state);
while (tasks.Count > 1)
{
long id = tasks.Dequeue();
RaiseTaskCompletion(id);
}
if (tasks.Count > 0 && runningTasks.Count < maxTasks)
{
EnqueueTask(tasks.Dequeue());
}
InvalidateMeasure();
}
/// <summary>Performs array resize and subset with linear interpolation</summary>
/// <param name="width">Result width</param>
/// <param name="height">Result height</param>
/// <param name="rect">Range of coordinates for entire data</param>
/// <param name="x">Coordinates of x points (length of array must be <paramref name="width"/></param>
/// <param name="y">Coordinates of y points (length of array must be <paramref name="height"/></param>
/// <param name="data">Source data array</param>
/// <param name="missingValue">Missing value or NaN if no missing value</param>
/// <returns>Resulting array with size <paramref name="width"/> * <paramref name="height"/></returns>
public static double[,] Filter(int width, int height, DataRect rect,
double[] x, double[] y, double[,] data, double missingValue)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (x == null)
{
throw new ArgumentNullException("x");
}
if (y == null)
{
throw new ArgumentNullException("y");
}
// Check preconditions
if (x.Length != data.GetLength(0))
{
throw new ArgumentException("Size of x and data arrays does not match");
}
if (y.Length != data.GetLength(1))
{
throw new ArgumentException("Size of y and data arrays does not match");
}
// Prepare filters
int[] hp, vp, hi, vi;
double[] ha, va, hw, vw;
PrepareFilterTables(width, rect.XMin, rect.XMax, x, out hp, out hi, out ha, out hw);
PrepareFilterTables(height, rect.YMin, rect.YMax, y, out vp, out vi, out va, out vw);
// Prepare arrays
double[,] r = new double[width, height];
bool hasMissingValue = !Double.IsNaN(missingValue);
double offset = 0;
if (hasMissingValue && missingValue == 0)
{
offset = -1;
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
r[i, j] = offset;
}
}
}
// Do filtering
int hpLen = hp.Length;
int vpLen = vp.Length;
for (int i = 0; i < hpLen; i++)
{
int px = hp[i];
int i0 = hi[i];
for (int j = 0; j < vpLen; j++)
{
int py = vp[j];
if (hasMissingValue && r[px, py] == missingValue)
{
continue;
}
int j0 = vi[j];
if (hasMissingValue &&
(data[i0, j0] == missingValue ||
data[i0 + 1, j0] == missingValue ||
data[i0, j0 + 1] == missingValue ||
data[i0 + 1, j0 + 1] == missingValue))
{
r[px, py] = missingValue;
}
else
{
double v0 = ha[i] * data[i0, j0] + (1 - ha[i]) * data[i0 + 1, j0];
double v1 = ha[i] * data[i0, j0 + 1] + (1 - ha[i]) * data[i0 + 1, j0 + 1];
double v = va[j] * v0 + (1 - va[j]) * v1;
r[px, py] += v * hw[i] * vw[j];
}
}
}
// Offset data if needed
if (offset != 0)
{
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
if (r[i, j] != missingValue)
{
r[i, j] -= offset;
}
}
}
}
return(r);
}
/// <summary>
/// Builds heatmap from specified data, grid, missing value, visibleRect and palette.
/// </summary>
/// <param name="data">2D array with data to plot</param>
/// <param name="missingValue">Missing value. Heatmap will have transparent regions at missing value.</param>
/// <param name="palette">Palette to translate numeric values to colors</param>
/// <param name="range">Min and max values in <paramref name="data"/> array</param>
/// <param name="rect">Heatmap rectangle screen coordinates</param>
/// <param name="screen">Plot rectaneg screen coordinates</param>
static public int[] BuildHeatMap(Rect screen, DataRect rect, double[] x, double[] y, double[,] data,
double missingValue, IPalette palette, Range range)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (x == null)
{
throw new ArgumentNullException("x");
}
if (y == null)
{
throw new ArgumentNullException("y");
}
if (palette == null)
{
throw new ArgumentNullException("palette");
}
int pixelWidth = (int)screen.Width;
int pixelHeight = (int)screen.Height;
int[] pixels = new int[pixelWidth * pixelHeight];
double doubleMissingValue = missingValue;
UInt32[] paletteColors = new uint[512];
if (!palette.IsNormalized)
{
range = palette.Range;
}
for (int i = 0; i < 512; i++)
{
Color c;
if (palette.IsNormalized)
{
c = palette.GetColor((double)i / 511.0);
}
else
{
c = palette.GetColor(range.Min + i * (range.Max - range.Min) / 511.0);
}
paletteColors[i] = (((uint)(c.A)) << 24) | (((uint)c.R) << 16) | (((uint)c.G) << 8) | c.B;
}
int xdimRank = x.Length;
int ydimRank = y.Length;
int xdataRank = data.GetLength(0);
int ydataRank = data.GetLength(1);
double factor = (range.Max != range.Min) ? (1.0 / (range.Max - range.Min)) : 0.0;
if (xdataRank == xdimRank && ydataRank == ydimRank)
{
double[,] v = null;
v = Filter(pixelWidth, pixelHeight, rect, x, y, data, doubleMissingValue);
if (palette.IsNormalized)
{
if (Double.IsNaN(doubleMissingValue))
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = v[i, pixelHeight - j - 1];
if (!Double.IsNaN(vv))
{
double v01 = (vv - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
else
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = v[i, pixelHeight - j - 1];
if (vv != doubleMissingValue)
{
double v01 = (vv - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
}
else // Palette is absolute
{
if (Double.IsNaN(doubleMissingValue))
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = v[i, pixelHeight - j - 1];
if (!Double.IsNaN(vv))
{
double v01 = (Math.Max(range.Min, Math.Min(range.Max, vv)) - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
else
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = v[i, pixelHeight - j - 1];
if (vv != doubleMissingValue)
{
double v01 = (Math.Max(range.Min, Math.Min(range.Max, vv)) - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
}
}
else if ((xdataRank + 1) == xdimRank && (ydataRank + 1) == ydimRank)
{
// Prepare arrays
int[] xPixelDistrib;
int[] yPixelDistrib;
xPixelDistrib = CreatePixelToDataMap(pixelWidth, Math.Max(x[0], rect.XMin), Math.Min(x[x.Length - 1], rect.XMax), x);
yPixelDistrib = CreatePixelToDataMap(pixelHeight, Math.Max(y[0], rect.YMin), Math.Min(y[y.Length - 1], rect.YMax), y);
if (palette.IsNormalized)
{
if (Double.IsNaN(doubleMissingValue))
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = data[xPixelDistrib[i], yPixelDistrib[pixelHeight - j - 1]];
if (!Double.IsNaN(vv))
{
double v01 = (vv - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
else
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = data[xPixelDistrib[i], yPixelDistrib[pixelHeight - j - 1]];
if (vv != doubleMissingValue)
{
double v01 = (vv - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
}
else // Palette is absolute
{
if (Double.IsNaN(doubleMissingValue))
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = data[xPixelDistrib[i], yPixelDistrib[pixelHeight - j - 1]];
if (!Double.IsNaN(vv))
{
double v01 = (Math.Max(range.Min, Math.Min(range.Max, vv)) - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
else
{
for (int j = 0, k = 0; j < pixelHeight; j++)
{
for (int i = 0; i < pixelWidth; i++, k++)
{
double vv = data[xPixelDistrib[i], yPixelDistrib[pixelHeight - j - 1]];
if (vv != doubleMissingValue)
{
double v01 = (Math.Max(range.Min, Math.Min(range.Max, vv)) - range.Min) * factor;
pixels[k] = (int)paletteColors[((uint)(511 * v01)) & 0x1FF];
}
}
}
}
}
}
else
{
throw new ArgumentException("Size of x,y and data arrays does not match conditions");
}
return(pixels);
}
/// <summary>
/// Initializes new instance of RenderTaskState class from given coordinate tranform.
/// </summary>
public RenderTaskState(DataRect actualPlotRect, Size screenSize)
{
ScreenSize = screenSize;
ActualPlotRect = actualPlotRect;
}
/// <summary>
/// Initializes new instance of RenderResult class form given parameters.
/// </summary>
/// <param name="image">Array of image pixels.</param>
/// <param name="visible">Visible rect for graph.</param>
/// <param name="offset">Image start offset.</param>
/// <param name="width">Image width.</param>
/// <param name="height">image height.</param>
public RenderResult(int[] image, DataRect visible, Point offset, double width, double height)
{
this.visible = visible;
this.output = new Rect(offset, new Size(width, height));
this.image = image;
}
/// <summary>
/// Measures the size in layout required for child elements and determines a size for a <see cref="Figure"/>.
/// </summary>
/// <param name="availableSize">The available size that this element can give to child elements. Infinity can be specified as a value to indicate that the element will size to whatever content is available.</param>
/// <returns>The size that this element determines it needs during layout, based on its calculations of child element sizes.</returns>
protected override Size MeasureOverride(Size availableSize)
{
// Update number of batches
SyncMarkerViewModels();
int batchCount = (int)Math.Ceiling(models.Count / (double)MarkersBatchSize);
while (batches.Count < batchCount)
{
var b = new Batch();
batches.Add(b);
Children.Add(b.Image);
Children.Add(b.Panel);
// Ensure inner plots have the same data transforms
b.Panel.SetBinding(PlotBase.XDataTransformProperty,
new Binding("XDataTransform")
{
Source = this
});
b.Panel.SetBinding(PlotBase.YDataTransformProperty,
new Binding("YDataTransform")
{
Source = this
});
}
availableSize = PerformAsMaster(availableSize);
// Request redraw of all batches if transform is changed
if (ScaleX != prevScaleX || ScaleY != prevScaleY || OffsetX != prevOffsetX || OffsetY != prevOffsetY)
{
prevScaleX = ScaleX;
prevScaleY = ScaleY;
prevOffsetX = OffsetX;
prevOffsetY = OffsetY;
idleTask.Start();
plotVersion++;
foreach (var b in batches)
{
b.ChangedProperties = null; // Update all properties
b.Panel.Visibility = System.Windows.Visibility.Collapsed;
b.Image.Visibility = System.Windows.Visibility.Visible;
}
}
foreach (UIElement elt in Children)
{
Image img = elt as Image;
if (img != null)
{
Batch batch = img.Tag as Batch;
if (batch != null && batch.Image == elt) // Special algorithm for snapshot image
{
DataRect plotRect = batch.PlotRect;
var newLT = new Point(LeftFromX(plotRect.XMin), TopFromY(plotRect.YMax));
var newRB = new Point(LeftFromX(plotRect.XMax), TopFromY(plotRect.YMin));
batch.Image.Measure(new Size(newRB.X - newLT.X, newRB.Y - newLT.Y));
}
else
{
elt.Measure(availableSize);
}
}
else
{
elt.Measure(availableSize);
}
}
return(availableSize);
}
/// <summary>
/// Sets plot rectangle for current instance of <see cref="PlotBase"/>
/// </summary>
/// <param name="plotRect">plot rectangle value that would be set for current instance of <see cref="PlotBase"/></param>
public void SetPlotRect(DataRect plotRect)
{
SetPlotRect(plotRect, false);
}
/// <summary>
/// Measures the size in layout required for child elements and determines a size for the Figure.
/// </summary>
/// <param name="availableSize">The available size that this element can give to child elements. Infinity can be specified as a value to indicate that the element will size to whatever content is available.</param>
/// <returns>The size that this element determines it needs during layout, based on its calculations of child element sizes.</returns>
protected override Size MeasureOverride(Size availableSize)
{
// Assuming we are master panel
var topElts = Children.Cast <UIElement>().Where(elt => GetPlacement(elt) == Placement.Top);
var bottomElts = Children.Cast <UIElement>().Where(elt => GetPlacement(elt) == Placement.Bottom);
var centerElts = Children.Cast <UIElement>().Where(elt => GetPlacement(elt) == Placement.Center);
var rightElts = Children.Cast <UIElement>().Where(elt => GetPlacement(elt) == Placement.Right);
var leftElts = Children.Cast <UIElement>().Where(elt => GetPlacement(elt) == Placement.Left);
DataRect desiredRect;
if (IsAutoFitEnabled)
{
desiredRect = AggregateBounds();
if (desiredRect.IsEmpty)
{
desiredRect = new DataRect(0, 0, 1, 1);
}
SetPlotRect(desiredRect, true);
}
else // resize
{
desiredRect = PlotRect;
}
//First Iteration: Measuring top and bottom slots,
//then meassuring left and right with top and bottom output values
// Create transform for first iteration
if (double.IsNaN(availableSize.Width) || double.IsNaN(availableSize.Height) ||
double.IsInfinity(availableSize.Width) || double.IsInfinity(availableSize.Height))
{
availableSize = new Size(100, 100);
}
Fit(desiredRect, availableSize);
// Measure top and bottom slots
double topBottomWidth = 0;
double topBottomHeight = 0;
topHeight = 0;
bottomHeight = 0;
foreach (var elt in topElts)
{
elt.Measure(availableSize);
var ds = elt.DesiredSize;
topBottomWidth = Math.Max(topBottomWidth, ds.Width);
topHeight += ds.Height;
}
topBottomHeight += topHeight;
foreach (var elt in bottomElts)
{
elt.Measure(availableSize);
var ds = elt.DesiredSize;
topBottomWidth = Math.Max(topBottomWidth, ds.Width);
bottomHeight += ds.Height;
}
topBottomHeight += bottomHeight;
// Measure left and right slots
double leftRightWidth = 0;
double leftRightHeight = 0;
leftWidth = 0;
rightWidth = 0;
foreach (var elt in leftElts)
{
elt.Measure(availableSize);
var ds = elt.DesiredSize;
leftRightHeight = Math.Max(leftRightHeight, ds.Height);
leftWidth += ds.Width;
}
leftRightWidth += leftWidth;
foreach (var elt in rightElts)
{
elt.Measure(availableSize);
var ds = elt.DesiredSize;
leftRightHeight = Math.Max(leftRightHeight, ds.Height);
rightWidth += ds.Width;
}
leftRightWidth += rightWidth;
//Measure center elements
Size availCenterSize = new Size(Math.Max(0, availableSize.Width - leftRightWidth), Math.Max(0, availableSize.Height - topBottomHeight));
Fit(desiredRect, availCenterSize);
foreach (var elt in centerElts)
{
elt.Measure(availCenterSize);
}
// Remeasure top and bottom slots
double topBottomWidth2 = 0;
double topBottomHeight2 = 0;
topHeight2 = 0;
bottomHeight2 = 0;
foreach (var elt in topElts)
{
elt.Measure(new Size(availCenterSize.Width, elt.DesiredSize.Height));
var ds = elt.DesiredSize;
topBottomWidth2 = Math.Max(topBottomWidth2, ds.Width);
topHeight2 += ds.Height;
}
topBottomHeight2 += topHeight2;
foreach (var elt in bottomElts)
{
elt.Measure(new Size(availCenterSize.Width, elt.DesiredSize.Height));
var ds = elt.DesiredSize;
topBottomWidth2 = Math.Max(topBottomWidth2, ds.Width);
bottomHeight2 += ds.Height;
}
topBottomHeight2 += bottomHeight2;
//Scaling elements of their new meassured height it not equal to first
if (bottomHeight2 > bottomHeight)
{
ScaleTransform transform = new ScaleTransform {
ScaleY = bottomHeight / bottomHeight2
};
foreach (var elt in bottomElts)
{
elt.RenderTransform = transform;
}
}
if (topHeight2 > topHeight)
{
ScaleTransform transform = new ScaleTransform {
ScaleY = topHeight / topHeight2
};
foreach (var elt in topElts)
{
elt.RenderTransform = transform;
}
}
// ReMeasure left and right slots
double leftRightWidth2 = 0;
double leftRightHeight2 = 0;
leftWidth2 = 0;
rightWidth2 = 0;
foreach (var elt in leftElts)
{
elt.Measure(new Size(elt.DesiredSize.Width, availCenterSize.Height));
var ds = elt.DesiredSize;
leftRightHeight2 = Math.Max(leftRightHeight2, ds.Height);
leftWidth2 += ds.Width;
}
leftRightWidth2 += leftWidth2;
foreach (var elt in rightElts)
{
elt.Measure(new Size(elt.DesiredSize.Width, availCenterSize.Height));
var ds = elt.DesiredSize;
leftRightHeight2 = Math.Max(leftRightHeight2, ds.Height);
rightWidth2 += ds.Width;
}
leftRightWidth2 += rightWidth2;
//Scaling elements of their new meassured height it not equal to first
if (leftWidth2 > leftWidth)
{
ScaleTransform transform = new ScaleTransform {
ScaleX = leftWidth / leftWidth2
};
foreach (var elt in leftElts)
{
elt.RenderTransform = transform;
}
}
if (rightWidth2 > rightWidth)
{
ScaleTransform transform = new ScaleTransform {
ScaleX = rightWidth / rightWidth2
};
foreach (var elt in rightElts)
{
elt.RenderTransform = transform;
}
}
centerSize = availCenterSize;
return(new Size(availCenterSize.Width + leftRightWidth, availCenterSize.Height + topBottomHeight));
}
/// <summary>
/// Updates current instance of <see cref="DataRect"/> with minimal DataRect which will contain current DataRect and specified DataRect
/// </summary>
/// <param name="rect">DataRect, which will be used for surrond of current instance of <see cref="DataRect"/></param>
public void Surround(DataRect rect)
{
this.x.Surround(rect.X);
this.y.Surround(rect.Y);
}
/// <summary>
/// Renders frame and returns it as a render result.
/// </summary>
/// <param name="state">Render task state for rendering frame.</param>
/// <returns>Render result of rendered frame.</returns>
protected override RenderResult RenderFrame(RenderTaskState state)
{
if (state == null)
{
throw new ArgumentNullException("state");
}
if (!state.Bounds.IsEmpty && !state.IsCanceled && data != null)
{
//DataRect dataRect = new DataRect(state.Transform.Visible);
//Rect output = state.Transform.Screen;
DataRect dataRect = state.ActualPlotRect;
DataRect output = new DataRect(0, 0, state.ScreenSize.Width, state.ScreenSize.Height);
DataRect bounds = state.Bounds;
if (dataRect.XMin >= bounds.XMax || dataRect.XMax <= bounds.XMin ||
dataRect.YMin >= bounds.YMax || dataRect.YMax <= bounds.YMin)
{
return(null);
}
double left = 0;
double xmin = dataRect.XMin;
double scale = output.Width / dataRect.Width;
if (xmin < bounds.XMin)
{
left = (bounds.XMin - dataRect.XMin) * scale;
xmin = bounds.XMin;
}
double width = output.Width - left;
double xmax = dataRect.XMax;
if (xmax > bounds.XMax)
{
width -= (dataRect.XMax - bounds.XMax) * scale;
xmax = bounds.XMax;
}
scale = output.Height / dataRect.Height;
double top = 0;
double ymax = dataRect.YMax;
if (ymax > bounds.YMax)
{
top = (dataRect.YMax - bounds.YMax) * scale;
ymax = bounds.YMax;
}
double height = output.Height - top;
double ymin = dataRect.YMin;
if (ymin < bounds.YMin)
{
height -= (bounds.YMin - dataRect.YMin) * scale;
ymin = bounds.YMin;
}
if (xmin < bounds.XMin)
{
xmin = bounds.XMin;
}
if (xmax > bounds.XMax)
{
xmax = bounds.XMax;
}
if (ymin < bounds.YMin)
{
ymin = bounds.YMin;
}
if (ymax > bounds.YMax)
{
ymax = bounds.YMax;
}
DataRect visibleData = new DataRect(xmin, ymin, xmax, ymax);
// Capture data to local variable
double[,] localData;
double[] localX, localY;
long localDataVersion;
IPalette localPalette;
double localMV;
Range localDataRange;
bool getMaxMin = false;
lock (locker)
{
localData = data;
localX = xArr;
localY = yArr;
localDataVersion = dataVersion;
localPalette = palette;
localMV = missingValue;
localDataRange = dataRange;
if (palette.IsNormalized && dataVersion != dataRangeVersion)
{
getMaxMin = true;
}
}
if (getMaxMin)
{
localDataRange = Double.IsNaN(missingValue) ?
HeatmapBuilder.GetMaxMin(data) :
HeatmapBuilder.GetMaxMin(data, missingValue);
lock (locker)
{
if (dataVersion == localDataVersion)
{
dataRangeVersion = dataVersion;
dataRange = localDataRange;
}
else
{
return(null); // New data was passed to Plot method so this render task is obsolete
}
}
}
if (paletteRangeUpdateRequired)
{
Dispatcher.BeginInvoke(new Action <long>(UpdatePaletteRange), localDataVersion);
}
return(new RenderResult(HeatmapBuilder.BuildHeatMap(new Rect(0, 0, width, height),
visibleData, localX, localY, localData, localMV, localPalette, localDataRange), visibleData, new Point(left, top), width, height));
}
else
{
return(null);
}
}