protected override void OnRefresh()
{
CustomGauge customGauge = Visual as CustomGauge; // ----------BG plate
CustomNeedle customNeedle = Visual as CustomNeedle; // ----- needle
if (customNeedle != null) // needle
{
_imageRect.X = customNeedle.Width * customGauge.Needle_PosX;;
_imageRect.Y = customNeedle.Height * customGauge.Needle_PosY;;
_image = ConfigManager.ImageManager.LoadImage(customNeedle.KnobImage);
_imageRect.Height = customGauge.Height * customGauge.Needle_Scale;
_imageRect.Width = (_image.Width * (customGauge.Height / _image.Height)) * customGauge.Needle_Scale; // uniform image based on Height
_brush = new ImageBrush(_image);
_center = new Point(customGauge.Width * customGauge.Needle_PivotX, customGauge.Height * customGauge.Needle_PivotY); // calculate rotation point
_punto = new Point((customNeedle.Width * customGauge.Needle_PivotX) + 1, customNeedle.Height * customGauge.Needle_PivotY);
}
else
{
_image = null;
_brush = null;
}
if (customGauge != null) // plate
{
_bgplate_imageRect.Width = customNeedle.Width;
_bgplate_imageRect.Height = customNeedle.Height;
_bgplate_image = ConfigManager.ImageManager.LoadImage(customGauge.BGPlateImage);
}
else
{
_bgplate_image = null;
_brush = null;
}
}
protected override void OnRender(System.Windows.Media.DrawingContext drawingContext)
{
_scopeBrush = new SolidColorBrush(Color.FromRgb(255, 0, 0));
Pen _scopePen = new Pen(_scopeBrush, 1d);
CustomNeedle customNeedle = Visual as CustomNeedle;
if (customNeedle != null)
{
drawingContext.DrawImage(_bgplate_image, _bgplate_imageRect);
drawingContext.PushTransform(new RotateTransform(customNeedle.KnobRotation, _center.X, _center.Y));
drawingContext.DrawImage(_image, _imageRect);
drawingContext.DrawLine(_scopePen, _center, _punto); //draw rotation point for reference
drawingContext.Pop();
}
}