Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free Software

 * Foundation; either version 3 of the License, or (at your option) any later

 * version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more

 * details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program; if not, write to the Free Software Foundation, Inc., 51

 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us at info AT

 * gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.featureform.swing.impl.dynformfield.ImageFile;

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import java.util.Objects;

import javax.swing.JComponent;

import javax.swing.JPanel;

import org.gvsig.imageviewer.ImageViewer;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dynform.DynFormFieldDefinition;

import org.gvsig.tools.dynform.JDynFormField;

import org.gvsig.tools.dynform.spi.DynFormSPIManager;

import org.gvsig.tools.dynform.spi.dynformfield.AbstractJDynFormField;

import org.gvsig.tools.dynform.spi.dynformfield.JDynFormFieldFactory;

import org.gvsig.tools.dynobject.Tags;

import org.gvsig.tools.swing.api.ToolsSwingLocator;

import org.gvsig.tools.swing.api.SimpleImage;

import org.gvsig.tools.util.ToolsUtilLocator;

public abstract class AbstractJDynFormFieldImage<T> extends AbstractJDynFormField implements JDynFormField, FocusListener {

    protected T assignedValue = null;

    protected T currentValue = null;

    protected boolean readonly = false;

    private ImageViewer imageViewer;

    private int fieldHeight;

    @SuppressWarnings("OverridableMethodCallInConstructor")

    public AbstractJDynFormFieldImage(

            DynFormSPIManager serviceManager,

            DynFormSPIManager.ComponentsFactory componentsFactory,

            JDynFormFieldFactory factory,

            DynFormFieldDefinition definition,

            Object value

    ) {

        super(serviceManager, componentsFactory, factory, definition, value);

        this.assignedValue = (T) value;

    }

    @Override

    public void loadDefaultValuesFromTags(Tags tags) {

        super.loadDefaultValuesFromTags(tags);

        this.fieldHeight = tags.getInt(DynFormSPIManager.TAG_DYNFORM_HEIGHT,200);

    }

    @Override

    public void setReadOnly(boolean readonly) {

        super.setReadOnly(readonly);

        if (this.contents != null) {

            this.contents.setEnabled(!readonly);

        }

    }

    @Override

    public Object getAssignedValue() {

        return this.assignedValue;

    }

    @Override

    public void initComponent() {

        this.initImageViewer();

        this.setValue(this.assignedValue);

    }

    protected void initImageViewer() {

        this.contents = new JPanel();

        this.contents.setLayout(new BorderLayout(2, 0));

        this.imageViewer = ToolsUtilLocator.getImageViewerManager().createImageViewer();

        JComponent jimageViewer = this.imageViewer.asJComponent();

        jimageViewer.setPreferredSize(new Dimension(300, this.fieldHeight));

        jimageViewer.setSize(300,this.fieldHeight);

        this.contents.add(jimageViewer, BorderLayout.CENTER);

        this.contents.setVisible(true);

    }

    @Override

    public boolean hasValidValue() {

        return true;

    }

    protected void fireFieldChangedEventIfChanged(T previous) {

        if (!Objects.equals(this.currentValue, previous)) {

            this.fireFieldChangedEvent();

        }

    }

    @Override

    public void focusGained(FocusEvent arg0) {

        fireFieldEnterEvent();

        this.problemIndicator().restore();

    }

    @Override

    public void focusLost(FocusEvent arg0) {

        fireFieldExitEvent();

    }

    @Override

    public void clear() {

        this.currentValue = null;

        this.updateImage(this.currentValue);

    }

    protected void updateImage(Object value) {

        if (value == null) {

            this.imageViewer.clean();

            return;

        }

        try {

            SimpleImage image = ToolsSwingLocator.getToolsSwingManager()

                    .createSimpleImage(value);

            this.imageViewer.setImage(image.getBufferedImage());

        } catch (Exception ex) {

            this.problemIndicator().set("Can't load image");

        }

    }

    @Override

    public double getResizeWeight() {

        Tags tags = this.getDefinition().getTags();

        if( !tags.has(DynFormSPIManager.TAG_DYNFORM_RESIZEWEIGHT) ) {

            return 1.0;

        }

        int resizeWeight = tags.getInt(DynFormSPIManager.TAG_DYNFORM_RESIZEWEIGHT, 0);

        if( resizeWeight<1 ) {

            return 0;

        }

        if( resizeWeight>100 ) {

            return 1;

        }

        return resizeWeight / 100.0;

    }

    @Override

    public abstract Object getValue();

    @Override

    public abstract void setValue(Object value);

}