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);
}
protected Variable GetCompositeVariableFromViewAndAttribute(T view, LayoutAttribute attribute, Variable leftVar, Variable rightVar, Variable topVar, Variable bottomVar)
{
switch (attribute)
{
case LayoutAttribute.Width:
{
var widthExpression = kiwi.kiwi.__minus__(
rightVar,
leftVar
);
var widthVariable = new Variable(viewEngine.GetViewName(view) + ".Width");
solver.addConstraint(new Constraint(
kiwi.kiwi.__minus__(widthVariable, widthExpression),
RelationalOperator.OP_EQ,
kiwi.kiwi.required));
AddVariableForViewAndAttribute(view, attribute, widthVariable);
return(widthVariable);
}
case LayoutAttribute.Height:
{
var heightExpression = kiwi.kiwi.__minus__(
bottomVar,
topVar
);
var heightVariable = new Variable(viewEngine.GetViewName(view) + ".Height");
solver.addConstraint(new Constraint(
kiwi.kiwi.__minus__(heightVariable, heightExpression),
RelationalOperator.OP_EQ,
kiwi.kiwi.required));
AddVariableForViewAndAttribute(view, attribute, heightVariable);
return(heightVariable);
}
case LayoutAttribute.CenterX:
{
var centerXExpression = kiwi.kiwi.__plus__(
kiwi.kiwi.__div__(leftVar, 2),
kiwi.kiwi.__div__(rightVar, 2)
);
var centerXVariable = new Variable(viewEngine.GetViewName(view) + ".CenterX");
solver.addConstraint(new Constraint(
kiwi.kiwi.__minus__(centerXVariable, centerXExpression),
RelationalOperator.OP_EQ,
kiwi.kiwi.required
));
AddVariableForViewAndAttribute(view, attribute, centerXVariable);
return(centerXVariable);
}
case LayoutAttribute.CenterY:
{
var centerYExpression = kiwi.kiwi.__plus__(
kiwi.kiwi.__div__(topVar, 2),
kiwi.kiwi.__div__(bottomVar, 2)
);
var centerYVariable = new Variable(viewEngine.GetViewName(view) + ".CenterY");
solver.addConstraint(new Constraint(
kiwi.kiwi.__minus__(centerYVariable, centerYExpression),
RelationalOperator.OP_EQ,
kiwi.kiwi.required
));
AddVariableForViewAndAttribute(view, attribute, centerYVariable);
return(centerYVariable);
}
}
return(null);
}
