private void UpdateDialBitmap()
{
//Generate new bitmap for dial. Should only be called when some property of the dial is changed.
DialBitmap = new Bitmap((int)DialRadius * 2, (int)DialRadius * 2);
Graphics g = Graphics.FromImage(DialBitmap);
RectangleF rect = new RectangleF(0, 0, DialRadius * 2, DialRadius * 2);
Brush myBrush = new SolidBrush(DialColor);
g.FillEllipse(myBrush, rect);
//Draw Grid
if (isGridEnabled)
{
Pen myPen = new Pen(Color.Black);
g.DrawLine(myPen, new Point((int)DialRadius, 0), new PointF((int)DialRadius, DialRadius * 2));
g.DrawLine(myPen, new Point(0, (int)DialRadius), new PointF(DialRadius * 2, (int)DialRadius));
}
if (m_numberMarker != null)
{
// Draw number markers for gauge.
m_numberMarker.Offset = new PointF(DialRadius, DialRadius);
m_numberMarker.Draw(g, this.m_centerPoint);
}
if (m_tickMarker != null)
{
m_tickMarker.Offset = new PointF(DialRadius, DialRadius);
m_tickMarker.Draw(g, this.m_centerPoint);
}
}
private void drawBackGround(Graphics gfx)
{
gfx.SmoothingMode = SmoothingMode.HighQuality;
gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
gfx.FillRectangle(new SolidBrush(BackColor), ClientRectangle);
Brush myBrush;
Pen myPen;
/* TODO : Arc and background Ellipse should be made into gaugeElements. */
/* Draw outer border. */
if (m_isBorderEnabled)
{
m_Border.Draw(gfx, this.CenterPoint);
}
/* If enabled, draw background ellipse. */
if (m_isBackGroundEllipseEnabled)
{
float radius = m_backGroundEllipseRadius;
if (m_isBorderEnabled)
{
radius -= m_Border.BorderWidth;
}
if (radius > 0)
{
RectangleF rect = new RectangleF(CenterPoint.X - radius, CenterPoint.Y - radius, 2 * radius, 2 * radius);
myBrush = new SolidBrush(m_backGroundEllipseColor);
gfx.FillEllipse(myBrush, rect);
if (isGridEnabled)
{
//Draw helper grid.
myPen = new Pen(Color.Red);
gfx.DrawLine(myPen, new Point((int)CenterPoint.X, 0), new Point((int)CenterPoint.X, Height));
gfx.DrawLine(myPen, new Point(0, (int)CenterPoint.Y), new Point(Width, (int)CenterPoint.Y));
}
}
}
//Draw markers
foreach (GaugeMarker m in m_markerList)
{
m.Draw(gfx, this.CenterPoint);
}
//Draw tick marker collection.
foreach (GaugeTickMarker m in m_TickMarkerCollection)
{
m.Draw(gfx, this.CenterPoint);
}
//Draw default number marker.
mainNumberMarker.Draw(gfx, this.CenterPoint);
/* Draw the arc */
if (m_isArcEnabled)
{
if (m_arcRadius > 0)
{
myPen = new Pen(m_arcColor, m_arcWidth);
gfx.DrawArc(myPen, new RectangleF(CenterPoint.X - m_arcRadius, CenterPoint.Y - m_arcRadius, 2 * m_arcRadius, 2 * m_arcRadius), m_arcStartAngle, (m_arcEndAngle - m_arcStartAngle));
}
}
//Draw custom text fields.
foreach (GaugeLabel label in m_CustomTextCollection)
{
label.Draw(gfx, this.CenterPoint);
}
}