QLGuiVisitor.java

package nl.uva.bromance.QL.gui;

import javafx.scene.layout.VBox;
import nl.uva.bromance.QL.ast.QLNode;
import nl.uva.bromance.QL.ast.QLNodeVisitorInterface;
import nl.uva.bromance.QL.ast.nodes.Calculation;
import nl.uva.bromance.QL.ast.nodes.Form;
import nl.uva.bromance.QL.ast.nodes.Question;
import nl.uva.bromance.QL.ast.nodes.Questionnaire;
import nl.uva.bromance.QL.controlstructures.Else;
import nl.uva.bromance.QL.controlstructures.If;
import nl.uva.bromance.QL.controlstructures.IfSequence;
import nl.uva.bromance.QL.expressions.unary.Primitive;
import nl.uva.bromance.QL.expressions.unary.Variable;
import nl.uva.bromance.QL.typechecking.SymbolTable;
import nl.uva.bromance.QL.typechecking.SymbolTableBuilderVisitor;
import java.util.ArrayList;
import java.util.Map;

class QLGuiVisitor implements QLNodeVisitorInterface
{
    VBox questionArea = null;
    Map<String, Primitive> answerMap;
    QLGUI qlGui;
    SymbolTable symbolTable = new SymbolTable();
    private boolean showQuestions = true;
    private Boolean evaluateElse = false;

    public QLGuiVisitor(VBox questionArea, Map<String, Primitive> answerMap, QLGUI qlGui, QLNode root)
    {
        this.questionArea = questionArea;
        this.answerMap = answerMap;
        this.qlGui = qlGui;
        this.symbolTable = new SymbolTableBuilderVisitor().build(root, new ArrayList<>());
    }
    @Override
    public void visit(QLNode qlNode) {

    }

    @Override
    public void visit(Form form)
    {
        javafx.scene.control.Label label = new javafx.scene.control.Label(form.getIdentifier());
        label.getStyleClass().add("formHeader");
        questionArea.getChildren().add(label);
    }

    @Override
    public void visit(Question question)
    {
        if (showQuestions)
        {
            javafx.scene.control.Label label = new javafx.scene.control.Label(question.getText());
            label.getStyleClass().add("question");
            Primitive questionPrimitive = answerMap.get(question.getIdentifier());
            questionArea.getChildren().add(label);
            questionPrimitive.drawQuestion(questionArea, qlGui);
        }
    }

    @Override
    public void visit(Questionnaire questionnaire)
    {
    }

    @Override
    public void visit(IfSequence sequence)
    {
        showQuestions = true;
    }

    @Override
    public void visit(If _if)
    {
        showQuestions = _if.evaluate(symbolTable).getValue();
        evaluateElse = !showQuestions;
    }

    @Override
    public void exit(If _f)
    {
        showQuestions = false;
    }

    @Override
    public void visit(Else _else)
    {
        if(evaluateElse)
            showQuestions = true;

        evaluateElse = false;

    }

    @Override
    public void exit(IfSequence sequence)
    {
        showQuestions = true;
    }

    @Override
    public void visit(Calculation calc)
    {
    }

    @Override
    public void visit(Variable var)
    {
    }

    @Override
    public void visit()
    {
    }
}