CombinedCollectionInputFieldImpl.java example

Explorer
jo-widgets-master
/*
 * Copyright (c) 2011, Michael Grossmann, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package org.jowidgets.impl.widgets.composed;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.jowidgets.api.widgets.IComposite;
import org.jowidgets.api.widgets.IInputControl;
import org.jowidgets.api.widgets.descriptor.ICombinedCollectionInputFieldDescriptor;
import org.jowidgets.common.color.IColorConstant;
import org.jowidgets.common.widgets.controller.IInputListener;
import org.jowidgets.common.widgets.layout.MigLayoutDescriptor;
import org.jowidgets.tools.layout.MigLayoutFactory;
import org.jowidgets.tools.widgets.wrapper.ControlWrapper;
import org.jowidgets.validation.IValidationConditionListener;
import org.jowidgets.validation.IValidationResult;
import org.jowidgets.validation.IValidator;

public class CombinedCollectionInputFieldImpl<ELEMENT_TYPE> extends ControlWrapper implements
        IInputControl<Collection<ELEMENT_TYPE>> {

    private final IInputControl<ELEMENT_TYPE> elementControl;
    private final IInputControl<Collection<ELEMENT_TYPE>> collectionControl;
    private final IInputListener inputListener;

    private boolean editable;

    @SuppressWarnings("unchecked")
    public CombinedCollectionInputFieldImpl(
        final IComposite composite,
        final ICombinedCollectionInputFieldDescriptor<ELEMENT_TYPE> setup) {
        super(composite);

        composite.setLayout(new MigLayoutDescriptor("hidemode 3", "0[grow, 0::]0", "0[grow, 0::]0"));

        this.elementControl = composite.add(setup.getElementTypeControlCreator(), MigLayoutFactory.GROWING_CELL_CONSTRAINTS);
        this.collectionControl = (IInputControl<Collection<ELEMENT_TYPE>>) composite.add(
                setup.getCollectionTypeControlCreator(),
                MigLayoutFactory.GROWING_CELL_CONSTRAINTS);

        collectionControl.setVisible(false);

        this.inputListener = new IInputListener() {
            @Override
            public void inputChanged() {
                if (elementControl.getValue() != null) {
                    final List<ELEMENT_TYPE> singletonList = Collections.singletonList(elementControl.getValue());
                    collectionControl.setValue(singletonList);
                }
                else {
                    collectionControl.setValue(null);
                }
            }
        };

        elementControl.addInputListener(inputListener);

        this.editable = setup.isEditable();
        if (!setup.isEditable()) {
            setEditable(false);
        }
    }

    @Override
    protected IComposite getWidget() {
        return (IComposite) super.getWidget();
    }

    @Override
    public void addValidator(final IValidator<Collection<ELEMENT_TYPE>> validator) {
        collectionControl.addValidator(validator);
    }

    @Override
    public boolean hasModifications() {
        return collectionControl.hasModifications() || elementControl.hasModifications();
    }

    @Override
    public void resetModificationState() {
        collectionControl.resetModificationState();
        elementControl.resetModificationState();
    }

    @Override
    public void setValue(final Collection<ELEMENT_TYPE> value) {
        elementControl.removeInputListener(inputListener);

        collectionControl.setValue(value);
        if (value != null && value.size() == 1) {
            elementControl.setValue(value.iterator().next());
            checkVisibility(false);
        }
        if (value == null || value.size() == 0) {
            elementControl.setValue(null);
            checkVisibility(false);
        }
        else if (value != null && value.size() > 1) {
            checkVisibility(true);
        }

        elementControl.addInputListener(inputListener);
    }

    private void checkVisibility(final boolean collection) {
        if (collection && !collectionControl.isVisible()) {
            switchVisibility();
        }
        else if (!collection && collectionControl.isVisible()) {
            switchVisibility();
        }
    }

    private void switchVisibility() {
        getWidget().layoutBegin();
        collectionControl.setVisible(!collectionControl.isVisible());
        elementControl.setVisible(!elementControl.isVisible());
        getWidget().layoutEnd();
    }

    @Override
    public Collection<ELEMENT_TYPE> getValue() {
        return collectionControl.getValue();
    }

    @Override
    public IValidationResult validate() {
        return collectionControl.validate().withResult(elementControl.validate());
    }

    @Override
    public void addValidationConditionListener(final IValidationConditionListener listener) {
        collectionControl.addValidationConditionListener(listener);
        elementControl.addValidationConditionListener(listener);
    }

    @Override
    public void removeValidationConditionListener(final IValidationConditionListener listener) {
        collectionControl.removeValidationConditionListener(listener);
        elementControl.removeValidationConditionListener(listener);
    }

    @Override
    public void setEditable(final boolean editable) {
        this.editable = editable;
        collectionControl.setEditable(editable);
        elementControl.setEditable(editable);
    }

    @Override
    public boolean isEditable() {
        return editable;
    }

    @Override
    public void setEnabled(final boolean enabled) {
        collectionControl.setEnabled(enabled);
        elementControl.setEnabled(enabled);
    }

    @Override
    public void addInputListener(final IInputListener listener) {
        collectionControl.addInputListener(listener);
        elementControl.addInputListener(listener);
    }

    @Override
    public void removeInputListener(final IInputListener listener) {
        collectionControl.removeInputListener(listener);
        elementControl.removeInputListener(listener);
    }

    @Override
    public void setToolTipText(final String toolTip) {
        collectionControl.setToolTipText(toolTip);
        elementControl.setToolTipText(toolTip);
    }

    @Override
    public void setForegroundColor(final IColorConstant colorValue) {
        collectionControl.setForegroundColor(colorValue);
        elementControl.setForegroundColor(colorValue);
    }

    @Override
    public void setBackgroundColor(final IColorConstant colorValue) {
        collectionControl.setBackgroundColor(colorValue);
        elementControl.setBackgroundColor(colorValue);
    }
}