McSubtaskDefInputPanel.java

package de.elatexam.editor.components.panels.tasks.mc;

import java.util.List;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.form.AjaxCheckBox;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.markup.html.form.IFormModelUpdateListener;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.form.validation.AbstractFormValidator;
import org.apache.wicket.markup.html.form.validation.IFormValidator;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.validation.validator.MinimumValidator;

import de.elatexam.editor.components.panels.tasks.SubtaskSpecificsInputPanel;
import de.elatexam.model.McSubTaskDef;
import de.elatexam.model.McSubTaskDef.McSubTaskDefAnswerDefinitionsItem;
import de.elatexam.model.McSubTaskDef.Type;

/**
 * @author Steffen Dienst
 * 
 */
public class McSubtaskDefInputPanel extends SubtaskSpecificsInputPanel<McSubTaskDef> implements IFormModelUpdateListener {
  private final MCAnswersInputPanel mcAnswers;
  final TextField<Integer> numanswersInput, minCorrectAnswers, maxCorrectAnswers;

  public McSubtaskDefInputPanel(final String id, final IModel<McSubTaskDef> model) {
    super(id, model);
    boolean showMoveButtons = model.getObject().isPreserveOrderOfAnswers();

    mcAnswers = new MCAnswersInputPanel("answers", new PropertyModel<List<McSubTaskDef.McSubTaskDefAnswerDefinitionsItem>>(model, "answerDefinitionsItems"), model.getObject().getCategory(), showMoveButtons);
    add(mcAnswers.setOutputMarkupId(true));

    add(new AjaxCheckBox("preserveOrderOfAnswers") {

      @Override
      protected void onUpdate(AjaxRequestTarget target) {
        mcAnswers.setMoveButtonsVisible(getModelObject());
        target.add(mcAnswers);
      }

    });
    numanswersInput = new TextField<Integer>("displayedAnswers");
    numanswersInput.add(new MinimumValidator<Integer>(1));
    add(numanswersInput);
    // TODO add validator (min<=max, min >0, max<=#answers)

    add(minCorrectAnswers = new TextField<Integer>("minCorrectAnswers"));
    minCorrectAnswers.add(new MinimumValidator<Integer>(1));
    add(maxCorrectAnswers = new TextField<Integer>("maxCorrectAnswers"));
  }

  /*
   * (non-Javadoc)
   * 
   * @see de.elatexam.editor.components.panels.tasks.SubtaskSpecificsInputPanel#getFormValidator()
   */
  @Override
  public IFormValidator getFormValidator() {
    return new AbstractFormValidator() {

      @Override
      public void validate(Form<?> form) {
        Integer numAnswers = numanswersInput.getConvertedInput();
        Integer min = minCorrectAnswers.getConvertedInput();
        Integer max = maxCorrectAnswers.getConvertedInput();
        if (min > numAnswers)
          minCorrectAnswers.error("Es gibt insgesamt nur " + numAnswers + " Antworten, Minimum muss also kleiner sein!");
        if (max > numAnswers)
          maxCorrectAnswers.error("Es gibt insgesamt nur " + numAnswers + " Antworten, Maximum muss also kleiner sein!");
        if (max < min)
          maxCorrectAnswers.error("Maximum ist kleiner als Minimum.");
      }

      @Override
      public FormComponent<?>[] getDependentFormComponents() {
        return new FormComponent<?>[] { numanswersInput, minCorrectAnswers, maxCorrectAnswers };
      }
    };
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.apache.wicket.markup.html.form.IFormModelUpdateListener#updateModel()
   */
  @Override
  public void updateModel() {
    // XXX make the mc a single choice taskdef iff there is just one correct answer
    McSubTaskDef mc = (McSubTaskDef) getDefaultModelObject();
    int correct = 0;
    for (McSubTaskDefAnswerDefinitionsItem answer : mc.getAnswerDefinitionsItems())
      if (answer.getItemCorrect() != null)
        correct++;
    if (correct == 1)
      mc.setCategory(Type.SINGLE_SELECT);
    else
      mc.setCategory(Type.MULTIPLE_SELECT);

  }

}