void Term(out ClLinearExpression e)
{
e = null; ClLinearExpression e1;
Factor(out e);
while (la.kind == 8 || la.kind == 9)
{
if (la.kind == 8)
{
Get();
Factor(out e1);
e = Cl.Times(e, e1);
}
else
{
Get();
Factor(out e1);
e = Cl.Divide(e, e1);
}
}
}
protected ClVariable GetCompositeVariableFromViewAndAttribute(T view, LayoutAttribute attribute)
{
if (HasVariableForViewAndAttribute(view, attribute))
{
return(GetVariableFromViewAndAttribute(view, attribute));
}
switch (attribute)
{
case LayoutAttribute.Width:
{
var leftVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Left);
var rightVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Right);
var widthExpression = Cl.Minus(
new ClLinearExpression(rightVar),
new ClLinearExpression(leftVar)
);
var widthVariable = new ClVariable(viewEngine.GetViewName(view) + ".Width");
solver.AddConstraint(new ClLinearEquation(
widthVariable,
widthExpression,
ClStrength.Required
));
AddVariableForViewAndAttribute(view, attribute, widthVariable);
return(widthVariable);
}
case LayoutAttribute.Height:
{
var topVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Top);
var bottomVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Bottom);
var heightExpression = Cl.Minus(
new ClLinearExpression(bottomVar),
new ClLinearExpression(topVar)
);
var heightVariable = new ClVariable(viewEngine.GetViewName(view) + ".Height");
solver.AddConstraint(new ClLinearEquation(
heightVariable,
heightExpression,
ClStrength.Required
));
solver.AddConstraint(new ClLinearInequality(
heightVariable,
Cl.Operator.GreaterThanOrEqualTo,
new ClLinearExpression(0)
));
AddVariableForViewAndAttribute(view, attribute, heightVariable);
return(heightVariable);
}
case LayoutAttribute.CenterX:
{
var leftVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Left);
var rightVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Right);
var centerXExpression = Cl.Plus(
Cl.Divide(new ClLinearExpression(leftVar), new ClLinearExpression(2)),
Cl.Divide(new ClLinearExpression(rightVar), new ClLinearExpression(2))
);
var centerXVariable = new ClVariable(viewEngine.GetViewName(view) + ".CenterX");
solver.AddConstraint(new ClLinearEquation(
centerXVariable,
centerXExpression,
ClStrength.Required
));
AddVariableForViewAndAttribute(view, attribute, centerXVariable);
return(centerXVariable);
}
case LayoutAttribute.CenterY:
{
var topVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Top);
var bottomVar = GetVariableFromViewAndAttribute(view, LayoutAttribute.Bottom);
var centerYExpression = Cl.Plus(
Cl.Divide(new ClLinearExpression(topVar), new ClLinearExpression(2)),
Cl.Divide(new ClLinearExpression(bottomVar), new ClLinearExpression(2))
);
var centerYVariable = new ClVariable(viewEngine.GetViewName(view) + ".CenterY");
solver.AddConstraint(new ClLinearEquation(
centerYVariable,
centerYExpression,
ClStrength.Required
));
AddVariableForViewAndAttribute(view, attribute, centerYVariable);
return(centerYVariable);
}
}
return(null);
}
