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20 #ifndef __EditableExpression__
21 #define __EditableExpression__
void setExpr(const std::string &expr)
Set's expressions and parses it into "control editable form".
Factors a SeExpr into an editable expression with controls (i.e. value boxes, curve boxes)
Editable * operator[](const int i)
Access an editable parameter.
std::vector< Editable * > Editables
void cleanup()
clean memeory
size_t size() const
Return the count of editable parameters.
bool controlsMatch(const EditableExpression &other) const
Check if the other editable expression has editables that all match i.e. the controls are same.
const std::vector< std::string > & getVariables() const
Get list of commentsø
void updateString(const EditableExpression &other)
Update the string refered to into the controls (this is only valid if controlsmatch)
std::string getEditedExpr() const
Return a reconstructed expression using all the editable's current values.
std::vector< std::string > _variables
std::vector< Editable * > _editables
</pre >< h3 > Binding our variable reference</h3 > If we now tried to use the variable would still not be found by our expressions To make it bindable we need to override the resolveVar() function as follows</pre >< h3 > Variable setting</h3 > Next we need to make a way of setting the variable As the controlling code will use the expression it will repeatedly alternate between setting the independent variables that are used and calling evaluate(). What it has to do depends very much on the application. In this case we only need to set the independent variable x as</pre >< h2 > Evaluating expressions</h2 > Evaluating an expression is pretty easy But before we can do that we need to make an instance< pre > GrapherExpr expr("x+x^2")