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maarztmaarzt
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Add widget for mutable choises
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‎src/main/java/net/imagej/ui/swing/widget/MutableChoices.java‎

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package net.imagej.ui.swing.widget;
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/**
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* @author Matthias Arzt
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*/
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public interface MutableChoices<T> {
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T get();
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default void setChoices(Iterable<T> choices) { setChoices(choices, v -> v.toString()); }
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void setChoices(Iterable<T> choices, PrettyPrinter<T> printer);
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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/SwingMutableChoicesWidget.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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/**
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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 SwingMutableChoicesWidget<T> extends SwingInputWidget<MutableChoices<T>> {
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private JComboBox<ComboBoxItem<T>> comboBox;
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private DefaultComboBoxModel<ComboBoxItem<T>> comboBoxModel;
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private MyMutableChoices<T> value;
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@Override
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protected void doRefresh() {
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comboBox.setSelectedItem(value.value);
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}
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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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initializeTableComboBox();
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initializeMutableChoices(model);
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}
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private void initializeTableComboBox() {
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comboBoxModel = new DefaultComboBoxModel<>();
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comboBox = new JComboBox<>(comboBoxModel);
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comboBox.addActionListener(e -> updateSelection());
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getComponent().add(comboBox);
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}
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private void initializeMutableChoices(WidgetModel model) {
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value = new MyMutableChoices<>(this);
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model.setValue(value);
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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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private void updateSelection() {
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get().setValue(getValue());
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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(MutableChoices.class);
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}
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@Override
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public MutableChoices<T> getValue() {
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ComboBoxItem<T> selectedItem = (ComboBoxItem<T>) comboBox.getSelectedItem();
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value.value = (selectedItem != null) ? selectedItem.get() : null;
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return value;
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}
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public void setChoices(Iterable<T> choices, MutableChoices.PrettyPrinter printer) {
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comboBoxModel.removeAllElements();
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if(! get().getItem().isRequired())
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comboBoxModel.addElement(new ComboBoxItem<T>("", null));
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for(T choice : choices)
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comboBoxModel.addElement(new ComboBoxItem<T>(printer.toString(choice), choice));
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}
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static private class MyMutableChoices<T> implements MutableChoices<T> {
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SwingMutableChoicesWidget<T> widget;
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private T value;
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private Iterable<T> choices;
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MyMutableChoices(SwingMutableChoicesWidget<T> widget) {
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this.widget = widget;
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}
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void detach() {
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widget = null;
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}
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@Override
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public void setChoices(Iterable<T> choices, PrettyPrinter<T> printer) {
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if (widget != null)
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widget.setChoices(choices, printer);
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}
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@Override
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public T get() {
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return value;
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}
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}
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static private class ComboBoxItem<E> {
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final String label;
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final E value;
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ComboBoxItem(String label, E value) {
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this.label = label;
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this.value = value;
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}
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@Override
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public String toString() { return label; }
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public E get() { return value; }
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}
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}

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