/// <summary>
/// Determines the shape type and Coords values for this GraphObj
/// </summary>
override public void GetCoords(PaneBase pane, Graphics g, float scaleFactor,
out string shape, out string coords)
{
// transform the x,y location from the user-defined
// coordinate frame to the screen pixel location
RectangleF pixRect = Location.TransformRect(pane);
Matrix matrix = new Matrix();
if (pixRect.Right == 0)
{
pixRect.Width = 1;
}
float angle = (float)Math.Atan((pixRect.Top - pixRect.Bottom) /
(pixRect.Left - pixRect.Right));
matrix.Rotate(angle, MatrixOrder.Prepend);
// Move the coordinate system to local coordinates
// of this text object (that is, at the specified
// x,y location)
matrix.Translate(-pixRect.Left, -pixRect.Top, MatrixOrder.Prepend);
PointF[] pts = new PointF[4];
pts[0] = new PointF(0, 3);
pts[1] = new PointF(pixRect.Width, 3);
pts[2] = new PointF(pixRect.Width, -3);
pts[3] = new PointF(0, -3);
matrix.TransformPoints(pts);
shape = "poly";
coords = String.Format("{0:f0},{1:f0},{2:f0},{3:f0},{4:f0},{5:f0},{6:f0},{7:f0},",
pts[0].X, pts[0].Y, pts[1].X, pts[1].Y,
pts[2].X, pts[2].Y, pts[3].X, pts[3].Y);
}
/// <summary>
/// Determines the shape type and Coords values for this GraphObj
/// </summary>
override public void GetCoords(PaneBase pane, Graphics g, float scaleFactor,
out string shape, out string coords)
{
// transform the x,y location from the user-defined
// coordinate frame to the screen pixel location
RectangleF pixRect = Location.TransformRect(pane);
shape = "rect";
coords = String.Format("{0:f0},{1:f0},{2:f0},{3:f0}",
pixRect.Left, pixRect.Top, pixRect.Right, pixRect.Bottom);
}
/// <summary>
/// Determine if the specified screen point lies inside the bounding box of this
/// <see cref="BoxObj"/>.
/// </summary>
/// <param name="pt">The screen point, in pixels</param>
/// <param name="pane">
/// A reference to the <see cref="PaneBase"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <returns>true if the point lies in the bounding box, false otherwise</returns>
override public bool PointInBox(PointF pt, PaneBase pane, Graphics g, float scaleFactor)
{
if (!base.PointInBox(pt, pane, g, scaleFactor))
{
return(false);
}
// transform the x,y location from the user-defined
// coordinate frame to the screen pixel location
RectangleF pixRect = Location.TransformRect(pane);
return(pixRect.Contains(pt));
}
/// <summary>
/// Determine if the specified screen point lies inside the bounding box of this
/// <see cref="BoxObj"/>.
/// </summary>
/// <param name="pt">The screen point, in pixels</param>
/// <param name="pane">
/// A reference to the <see cref="PaneBase"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <returns>true if the point lies in the bounding box, false otherwise</returns>
override public bool PointInBox(PointF pt, PaneBase pane, Graphics g, float scaleFactor)
{
if (!base.PointInBox(pt, pane, g, scaleFactor))
{
return(false);
}
// transform the x,y location from the user-defined
// coordinate frame to the screen pixel location
RectangleF pixRect = Location.TransformRect(pane);
using (GraphicsPath path = new GraphicsPath())
{
path.AddEllipse(pixRect);
return(path.IsVisible(pt));
}
}
/// <summary>
/// Render this object to the specified <see cref="Graphics"/> device
/// This method is normally only called by the Draw method
/// of the parent <see cref="GraphObjList"/> collection object.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="PaneBase"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
override public void Draw(Graphics g, PaneBase pane, float scaleFactor)
{
if (_image != null)
{
// Convert the rectangle coordinates from the user coordinate system
// to the screen coordinate system
RectangleF tmpRect = Location.TransformRect(pane);
if (_isScaled)
{
g.DrawImage(_image, tmpRect);
}
else
{
Region clip = g.Clip;
g.SetClip(tmpRect);
g.DrawImageUnscaled(_image, Rectangle.Round(tmpRect));
g.SetClip(clip, CombineMode.Replace);
//g.DrawImageUnscaledAndClipped( image, Rectangle.Round( tmpRect ) );
}
}
}