/// <summary>
/// Renders a graph using this renderer
/// </summary>
public void Render( IGraphCanvas graphics, GraphTransform transform, IGraph2dSource data, PointF cursorDataPt, bool enabled )
{
Graph2dSourceUniformValue uniformData = ( Graph2dSourceUniformValue )data;
if ( uniformData.FixedAxis == Graph2dSourceUniformValue.Axis.X )
{
float dataX = transform.DataToScreen( new PointF( uniformData.Value, 0 ) ).X;
// TODO: Need to
if ( Math.Abs( cursorDataPt.X - uniformData.Value ) < transform.ScreenToDataXScale * Graph2dUniformValueController.ScreenSelectionTolerance )
{
graphics.DrawLine( s_HighlightPen, dataX, transform.DrawBounds.Top, dataX, transform.DrawBounds.Bottom );
}
graphics.DrawLine( m_Pen, dataX, transform.DrawBounds.Top, dataX, transform.DrawBounds.Bottom );
}
else
{
float dataY = transform.DataToScreen( new PointF( 0, uniformData.Value ) ).Y;
if ( Math.Abs( cursorDataPt.Y - uniformData.Value ) < transform.ScreenToDataYScale * Graph2dUniformValueController.ScreenSelectionTolerance )
{
graphics.DrawLine( s_HighlightPen, transform.DrawBounds.Left, dataY, transform.DrawBounds.Right, dataY );
}
graphics.DrawLine( m_Pen, transform.DrawBounds.Left, dataY, transform.DrawBounds.Right, dataY );
}
}
/// <summary>
/// Draws a grid
/// </summary>
public static void DrawGrid( IGraphCanvas graphics, Pen pen, Pen zeroPen, Rectangle drawBounds, RectangleF dataBounds, float cellDataWidth, float cellDataHeight )
{
float dataX = ( int )( dataBounds.Left / cellDataWidth ) * cellDataWidth;
float dataY = ( int )( dataBounds.Top / cellDataHeight ) * cellDataHeight;
int widthInCells = ( int )( dataBounds.Width / cellDataWidth ) + 1;
int heightInCells = ( int )( dataBounds.Height / cellDataHeight ) + 1;
for ( int cellX = 0; cellX < widthInCells; ++cellX )
{
Pen drawPen = ( Math.Abs( dataX ) < 0.001f ) ? zeroPen : pen;
float drawX = ( ( ( dataX - dataBounds.Left ) / dataBounds.Width ) * drawBounds.Width ) + drawBounds.Left;
graphics.DrawLine( drawPen, drawX, drawBounds.Bottom, drawX, drawBounds.Top );
dataX += cellDataWidth;
}
for ( int cellY = 0; cellY < heightInCells; ++cellY )
{
Pen drawPen = ( Math.Abs( dataY ) < 0.001f ) ? zeroPen : pen;
float drawY = InvY( ( ( ( dataY - dataBounds.Top ) / dataBounds.Height ) * drawBounds.Height ) + drawBounds.Top, drawBounds );
graphics.DrawLine( drawPen, drawBounds.Left, drawY, drawBounds.Right, drawY );
dataY += cellDataHeight;
}
}
/// <summary>
/// Renders graph data
/// </summary>
/// <param name="graphics">Graphics object to render into</param>
/// <param name="transform">Graph view transform</param>
/// <param name="data">Data to render</param>
/// <param name="cursorDataPt">Position of the mouse cursor in data space</param>
/// <param name="enabled">The enabled state of the graph control</param>
public virtual void Render( IGraphCanvas graphics, GraphTransform transform, IGraph2dSource data, PointF cursorDataPt, bool enabled )
{
IGraphX2dSource eval = ( IGraphX2dSource )data;
Pen pen = ( enabled && !data.Disabled ) ? m_Pen : s_DisabledPen;
Pen shadowPen = null;
if ( !data.Disabled )
{
if ( data.Selected )
{
shadowPen = s_SelectedPen;
}
else if ( data.Highlighted )
{
shadowPen = s_HighlightedPen;
}
}
float dataX = transform.DataBounds.Left;
float dataXInc = transform.DataBounds.Width / transform.DrawBounds.Width;
Point lastPt = transform.DataToScreen( new PointF( dataX, eval.Evaluate( dataX ) ) ) ;
dataX += dataXInc;
for ( int drawX = 1; drawX < transform.DrawBounds.Width; ++drawX, dataX += dataXInc )
{
Point pt = transform.DataToScreen( new PointF( dataX, eval.Evaluate( dataX ) ) );
graphics.DrawLine( pen, lastPt.X, lastPt.Y, pt.X, pt.Y );
if ( enabled && shadowPen != null )
{
graphics.DrawLine( shadowPen, lastPt.X, lastPt.Y + 1, pt.X, pt.Y + 1 );
graphics.DrawLine( shadowPen, lastPt.X, lastPt.Y - 1, pt.X, pt.Y - 1 );
}
lastPt = pt;
}
}
/// <summary>
/// Draws a graph line
/// </summary>
private static void DrawGraphLine( IGraphCanvas graphics, Pen pen, Pen shadowPen, bool enabled, Point lastPt, Point pt )
{
graphics.DrawLine( pen, pt.X, pt.Y, lastPt.X, lastPt.Y );
if ( enabled && shadowPen != null )
{
graphics.DrawLine( shadowPen, lastPt.X, lastPt.Y + 1, pt.X, pt.Y + 1 );
graphics.DrawLine( shadowPen, lastPt.X, lastPt.Y - 1, pt.X, pt.Y - 1 );
}
}