/*
 * Copyright (c) 2012, Michael Grossmann
 * 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.spi.impl.swt.common.widgets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Scale;
import org.jowidgets.common.types.Orientation;
import org.jowidgets.spi.impl.swt.common.image.SwtImageRegistry;
import org.jowidgets.spi.widgets.ISliderSpi;
import org.jowidgets.spi.widgets.setup.ISliderSetupSpi;
import org.jowidgets.util.Assert;

public final class SliderImpl extends AbstractInputControl implements ISliderSpi {

    private final Orientation orientation;

    public SliderImpl(final Object parentUiReference, final ISliderSetupSpi setup, final SwtImageRegistry imageRegistry) {
        super(new Scale((Composite) parentUiReference, getStyle(setup)), imageRegistry);

        this.orientation = setup.getOrientation();

        final Scale scale = getUiReference();

        scale.setMaximum(setup.getMaximum());
        scale.setMinimum(setup.getMinimum());
        scale.setSelection(setup.getMinimum());
        scale.setPageIncrement(setup.getTickSpacing());
        scale.setToolTipText(setup.getToolTipText());

        scale.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(final SelectionEvent e) {
                fireInputChanged(getSelection());
            }
        });
    }

    @Override
    public Scale getUiReference() {
        return (Scale) super.getUiReference();
    }

    private static int getStyle(final ISliderSetupSpi setup) {
        Assert.paramNotNull(setup.getOrientation(), "setup.getOrientation()");
        int result = SWT.NONE;
        if (setup.getOrientation() == Orientation.HORIZONTAL) {
            result = result | SWT.HORIZONTAL;
        }
        else if (setup.getOrientation() == Orientation.VERTICAL) {
            result = result | SWT.VERTICAL;
        }
        else {
            throw new IllegalArgumentException("The orientation '" + setup.getOrientation() + "' is not supported");
        }
        return result;
    }

    @Override
    public void setEditable(final boolean editable) {
        getUiReference().setEnabled(editable);
    }

    @Override
    public int getSelection() {
        if (orientation == Orientation.HORIZONTAL) {
            return getUiReference().getSelection();
        }
        else {
            return getUiReference().getMaximum() - getUiReference().getSelection();
        }
    }

    @Override
    public void setSelection(final int value) {
        if (orientation == Orientation.HORIZONTAL) {
            getUiReference().setSelection(value);
        }
        else {
            getUiReference().setSelection(getUiReference().getMaximum() - value);
        }
        fireInputChanged(getSelection());
    }

}