/// <summary>
/// Low-level draw method used by other rendering methods.
/// </summary>
/// <param name="visitor">the draw visitor</param>
/// <param name="bounds">a bound rendering element</param>
/// <param name="zoom">if the diagram is zoomed at all</param>
/// <param name="viewBounds">the view bounds - the root will be centered in the bounds</param>
protected void Draw(IDrawVisitor visitor, double zoom, Bounds bounds, Rect viewBounds)
{
var modelScale = zoom * model.GetScale();
var zoomToFit = Math.Min(viewBounds.Width / (bounds.Width * modelScale), viewBounds.Height / (bounds.Height * modelScale));
var transform = Matrix.Identity;
// setup up transform
transform.TranslatePrepend(viewBounds.CenterX(), viewBounds.CenterY());
transform.ScalePrepend(modelScale, -modelScale);
// default is shrink only unless specified
if (model.GetFitToScreen() || zoomToFit < 1)
{
transform.ScalePrepend(zoomToFit, zoomToFit);
}
transform.TranslatePrepend(-(bounds.MinX + bounds.MaxX) / 2, -(bounds.MinY + bounds.MaxY) / 2);
// not always needed
var fontManager = new WPFFontManager
{
Zoom = zoomToFit
};
visitor.RendererModel = model;
visitor.FontManager = fontManager;
visitor.Visit(bounds.Root, new MatrixTransform(transform));
}
private double CalcFitting(double margin, double padding, Dimensions required, string fmt)
{
if (dimensions == Dimensions.Automatic)
{
return(1); // no fitting
}
var targetDim = dimensions;
targetDim = targetDim.Add(-2 * margin, -2 * margin).Add(-((nCol - 1) * padding), -((nRow - 1) * padding));
double resize = Math.Min(targetDim.width / required.width,
targetDim.height / required.height);
if (resize > 1 && !model.GetFitToScreen())
{
resize = 1;
}
return(resize);
}
private double CalcFitting(double margin, double padding, Dimensions mainRequired, Dimensions sideRequired,
Dimensions titleRequired,
double firstRowHeight, string fmt)
{
if (dimensions == Dimensions.Automatic)
{
return(1); // no fitting
}
var nSideCol = xOffsetSide.Length - 1;
var nSideRow = yOffsetSide.Length - 1;
// need padding in calculation
var mainCompOffset = sideRequired.height > 0 ? sideRequired.height + (nSideRow * padding) - (firstRowHeight / 2) : 0;
if (mainCompOffset < 0)
{
mainCompOffset = 0;
}
Dimensions required = mainRequired.Add(sideRequired.width, mainCompOffset)
.Add(0, Math.Max(0, titleRequired.height));
// We take out the padding height of the side components but in reality
// some of it overlaps, since reactions are normally wider then they are
// tall we won't normally bit fitting by this parameter. If do fit by this
// parameter we might make the depiction smaller then it needs to be but thats
// better than cutting bits off
var targetDim = dimensions;
targetDim = targetDim.Add(-2 * margin, -2 * margin)
.Add(-((nCol - 1) * padding), -((nRow - 1) * padding))
.Add(-(nSideCol - 1) * padding, -(nSideRow - 1) * padding)
.Add(0, titleRequired.height > 0 ? -padding : 0);
var resize = Math.Min(targetDim.width / required.width,
targetDim.height / required.height);
if (resize > 1 && !model.GetFitToScreen())
{
resize = 1;
}
return(resize);
}
