void SetRanges(CalcRange xRange, CalcRange yRange, string zRangeText)
{
// Refreshes display as side effect
var newRanges = string.Format(CultureInfo.InvariantCulture, "{0:G8}..{1:G8}; {2:G8}..{3:G8}; {4}",
xRange.Lo, xRange.Hi, yRange.Lo, yRange.Hi, zRangeText);
Trace.WriteLine(newRanges);
cbRanges.Text = newRanges;
}
private void Zoom(double ratio)
{
if (_outState != null)
{
string zRange = _outState.ZRange.RangeExpr?.Range.SourceText.ToString() ?? "";
CalcRange newX = _outState.XRange.ZoomedBy(ratio);
CalcRange newY = _outState.YRange.ZoomedBy(ratio);
SetRanges(newX, newY, zRange);
}
}
private void picPanel_MouseDown(object sender, MouseEventArgs e)
{
if (_outState != null)
{
_dragging = graphPanel.Capture = (e.Button == MouseButtons.Left);
_dragStartPoint = e.Location;
_originalRanges = cbRanges.Text;
_originalXRange = _outState.XRange;
_originalYRange = _outState.YRange;
_originalZRange = _outState.ZRange.RangeExpr?.Range.SourceText.ToString() ?? "";
}
}
private void picPanel_MouseMove(object sender, MouseEventArgs e)
{
if (_dragging)
{
lblMouseOver.Visible = false;
CalcRange newX = _originalXRange.DraggedBy(e.Location.X - _dragStartPoint.X);
CalcRange newY = _originalYRange.DraggedBy(-(e.Location.Y - _dragStartPoint.Y));
SetRanges(newX, newY, _originalZRange);
}
else
{
lblMouseOver.Text = _outState?.GetMouseOverText(e.Location) ?? "";
lblMouseOver.Visible = lblMouseOver.Text.Length != 0;
}
}
public abstract CalculatorCore WithXRange(CalcRange newValue);
public static CalculatorCore New(LNode expr, Dictionary <Symbol, LNode> vars, CalcRange xRange, CalcRange yRange)
{
// Find out if the expression uses the variable "y" (or is an equation with '=' or '==')
// As an (unnecessary) side effect, this throws if an unreferenced var is used
bool isEquation = expr.Calls(CodeSymbols.Assign, 2) || expr.Calls(CodeSymbols.Eq, 2), usesY = false;
if (!isEquation)
{
LNode zero = LNode.Literal((double)0);
Func <Symbol, double> lookup = null;
lookup = name => name == sy_x || (usesY |= name == sy_y) ? 0 : Eval(vars[name], lookup);
Eval(expr, lookup);
}
if (isEquation || usesY)
{
return(new Calculator3D(expr, vars, xRange, yRange));
}
else
{
return(new Calculator2D(expr, vars, xRange));
}
}
public Calculator3D WithYRange(CalcRange newValue)
{
return(new Calculator3D(Expr, Vars, XRange, newValue));
}
public override CalculatorCore WithXRange(CalcRange newValue)
{
return(new Calculator3D(Expr, Vars, newValue, YRange));
}
// Base class constructor and fields
public CalculatorCore(LNode Expr, Dictionary <Symbol, LNode> Vars, CalcRange XRange)
{
this.Expr = Expr;
this.Vars = Vars;
this.XRange = XRange;
}
public Calculator3D(LNode Expr, Dictionary <Symbol, LNode> Vars, CalcRange XRange, CalcRange YRange)
: base(Expr, Vars, XRange)
{
this.YRange = YRange;
}
public Calculator2D(LNode Expr, Dictionary <Symbol, LNode> Vars, CalcRange XRange)
: base(Expr, Vars, XRange)
{
}