object ISeries.GetLegendItemImageSource(int index, ref C1.Chart._Size imageSize)
{
if (ShowCustomIcons)
{
imageSize.Width = 60;
imageSize.Height = 60;
SmartPhoneVendor vendor = ViewModel.SmartPhoneVendors.ElementAt(index);
if (vendor.ImageSource is BitmapImage)
{
// replace the BitmapImage with a new ImageSource wrapped in the legend item color
SolidColorBrush brush = new SolidColorBrush(vendor.Color);
vendor.ImageSource = makeLegendImageSource(vendor.ImageSource, brush, imageSize);
}
// Try and keep the original size of the logo bitmaps, but reduce their size if the chart window
// is too small to display the bitmaps properly.
double boundsHeight = ParentControl.ArrangeBounds.Height - 50;
double divadj = (boundsHeight > 800) ? 13 : 25;
double fracHeight = boundsHeight / divadj;
if (fracHeight < imageSize.Height)
{
imageSize.Width = imageSize.Height = fracHeight;
}
return(vendor.ImageSource);
}
else
{
return(null);
}
}
object ISeries.GetLegendItemImageSource(int index, ref C1.Chart._Size imageSize)
{
if (ShowCustomIcons)
{
// Original images/logos are all 50x50 pixels.
// Here they are replaced with new images where a 5 pixel border is added
// around the logos.
imageSize.Height = 60;
imageSize.Width = 60;
SmartPhoneVendor vendor = vendors.ElementAt(index);
if (vendor.Image != null && vendor.Image.Width != 60)
{
Bitmap bmp = new Bitmap(60, 60);
using (SolidBrush sb = new SolidBrush(vendor.Color))
{
using (Graphics g = Graphics.FromImage(bmp))
{
Rectangle r = new Rectangle(0, 0, (int)imageSize.Width, (int)imageSize.Height);
using (Pen p = new Pen(sb))
{
g.DrawRectangle(p, r);
}
g.FillRectangle(sb, r);
Point ci = new Point((int)(0.5 * (imageSize.Width - vendor.Image.Width)),
(int)(0.5 * (imageSize.Height - vendor.Image.Height)));
g.DrawImage(vendor.Image, ci);
}
}
vendor.Image = bmp;
}
// Try and keep the original size of the logo bitmaps, but reduce their size if the chart window
// is too small to display the bitmaps properly.
Size bounds = this.Chart.ClientSize;
double divadj = (bounds.Height > 800) ? 12 : 25;
double fracHeight = bounds.Height / divadj;
if (fracHeight < imageSize.Height)
{
imageSize.Width = imageSize.Height = fracHeight;
}
return(vendor.Image);
}
return(null);
}
object ISeries.GetLegendItemImageSource(int index, ref C1.Chart._Size imageSize)
{
if (ShowCustomIcons)
{
var bounds = Windows.UI.ViewManagement.ApplicationView.
GetForCurrentView().VisibleBounds;
double divadj = bounds.Height > 900 ? 15 : 35;
double fracHeight = bounds.Height / divadj;
imageSize.Width = imageSize.Height = fracHeight < 60 ? fracHeight : 60;
SmartPhoneVendor vendor = SampleViewModel.SmartPhoneVendors.ElementAt(index);
return(vendor.ImageSource);
}
else
{
return(null);
}
}