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maarztmaarzt
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Add widget for multiple choises
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‎src/main/java/net/imagej/ui/swing/widget/MultipleChoices.java‎

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package net.imagej.ui.swing.widget;
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import java.util.Set;
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/**
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* @author Matthais Arzt
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*/
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public interface MultipleChoices<T> {
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void setChoices(Iterable<T> choices, PrettyPrinter<T> prettyPrinter);
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boolean get(T choice);
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Set<T> get();
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void set(Set<T> selected);
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void set(T choice, boolean value);
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interface PrettyPrinter<T> {
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String toString(T value);
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}
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}

‎src/main/java/net/imagej/ui/swing/widget/SwingMultipleChoicesWidget.java‎

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package net.imagej.ui.swing.widget;
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import org.scijava.module.MethodCallException;
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import org.scijava.plugin.Plugin;
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import org.scijava.ui.swing.widget.SwingInputWidget;
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import org.scijava.widget.InputWidget;
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import org.scijava.widget.WidgetModel;
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import javax.swing.*;
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import java.awt.event.ActionEvent;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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/**
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* @author Matthias Arzt
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*/
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@Plugin(type = InputWidget.class)
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public class SwingMultipleChoicesWidget<T> extends SwingInputWidget<MultipleChoices<T>> {
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Map<JCheckBox, T> checkBoxes = new HashMap<>();
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MyMultipleChoices<T> result;
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@Override
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public void set(final WidgetModel model) {
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super.set(model);
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getComponent().setLayout(new BoxLayout(getComponent(), BoxLayout.PAGE_AXIS));
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result = new MyMultipleChoices<T>(this);
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get().setValue(result);
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try {
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model.getItem().initialize(model.getModule());
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model.getPanel().refresh();
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} catch (MethodCallException e) {
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e.printStackTrace();
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}
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}
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@Override
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protected void doRefresh() {
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checkBoxes.forEach((checkBox, choice) -> checkBox.setSelected(result.get(choice)));
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}
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@Override
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public MultipleChoices<T> getValue() {
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return result;
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}
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@Override
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public boolean supports(final WidgetModel model) {
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return model.isType(MultipleChoices.class);
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}
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private void setChoices(Iterable<T> choices, MultipleChoices.PrettyPrinter<T> prettyPrinter) {
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JPanel panel = getComponent();
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for(JCheckBox oldCheckBox : checkBoxes.keySet())
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panel.remove(oldCheckBox);
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checkBoxes.clear();
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result.get().clear();
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if(choices != null)
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for(T choice : choices) {
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String text = prettyPrinter.toString(choice);
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JCheckBox checkBox = new JCheckBox(text);
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checkBoxes.put(checkBox, choice);
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checkBox.addActionListener(e -> checkBoxChanged(e));
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panel.add(checkBox);
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}
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panel.revalidate();
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}
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private void checkBoxChanged(ActionEvent e) {
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JCheckBox source = (JCheckBox) e.getSource();
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T choice = checkBoxes.get(source);
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result.set(choice, source.isSelected());
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get().setValue(result);
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}
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static private class MyMultipleChoices<T> implements MultipleChoices<T> {
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final SwingMultipleChoicesWidget<T> widget;
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Set<T> selected;
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private MyMultipleChoices(SwingMultipleChoicesWidget<T> widget) {
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this.widget = widget;
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selected = new HashSet<T>();
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}
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@Override
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public void setChoices(Iterable<T> choices, PrettyPrinter<T> prettyPrinter) {
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widget.setChoices(choices, prettyPrinter);
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}
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@Override
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public boolean get(T value) {
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return selected.contains(value);
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}
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@Override
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public void set(T choice, boolean value) {
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if(value)
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selected.add(choice);
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else
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selected.remove(choice);
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}
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@Override
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public Set<T> get() {
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return selected;
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}
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@Override
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public void set(Set<T> s) {
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selected.clear();
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selected.addAll(s);
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}
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}
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}

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