private void UpdateLabelTexture()
{
if (labelImage != null)
{
if (labelFont == null)
{
var emSize = Font.SizeInPoints * (labelImage.Height * LabelFontScale) / Font.Height;
labelFont = new Font(Font.FontFamily, emSize);
}
labelImage.SetZero();
using (var labelBitmap = new Bitmap(labelImage.Width, labelImage.Height, labelImage.WidthStep, System.Drawing.Imaging.PixelFormat.Format32bppArgb, labelImage.ImageData))
using (var graphics = Graphics.FromImage(labelBitmap))
using (var regionBrush = new SolidBrush(Color.FromArgb(FillOpacity, Color.Red)))
using (var selectedBrush = new SolidBrush(Color.FromArgb(FillOpacity, Color.LimeGreen)))
using (var format = new StringFormat())
{
graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
graphics.SmoothingMode = SmoothingMode.AntiAlias;
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
for (int i = 0; i < regions.Count; i++)
{
var rect = RegionRectangle(regions[i]);
var brush = i == selectedRoi ? selectedBrush : regionBrush;
graphics.FillEllipse(brush, rect);
graphics.DrawString(i.ToString(CultureInfo.InvariantCulture), labelFont, Brushes.White, rect, format);
}
}
labelTexture.Update(labelImage);
}
}
protected virtual void SetImage(IplImage image)
{
MakeCurrent();
texture.Update(image, ImageScale);
Canvas.Invalidate();
canvasInvalidated = true;
}
protected override void ShowMashup(IList <object> values)
{
base.ShowMashup(values);
visualizerCanvas.MakeCurrent();
if (VisualizerImage != null)
{
imageTexture.Update(VisualizerImage);
}
visualizerCanvas.Canvas.Invalidate();
}
protected virtual void ShowMashup(IList <object> values)
{
drawnValues = values;
foreach (var mashupValue in values.Zip(EnumerableMashup(this, Mashups.Select(xs => (DialogTypeVisualizer)xs.Visualizer)), (value, visualizer) => new { value, visualizer }))
{
mashupValue.visualizer.Show(mashupValue.value);
}
visualizerCanvas.MakeCurrent();
if (visualizerImage != null)
{
imageTexture.Update(visualizerImage);
}
visualizerCanvas.Canvas.Invalidate();
}