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.expressionevaluator.swing.impl.dynformfield;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import javax.swing.JButton;

import javax.swing.JPanel;

import javax.swing.text.JTextComponent;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.Expression;

import org.gvsig.expressionevaluator.ExpressionUtils;

import org.gvsig.expressionevaluator.swing.ExpressionEvaluatorSwingLocator;

import org.gvsig.expressionevaluator.swing.ExpressionEvaluatorSwingManager;

import org.gvsig.expressionevaluator.swing.ExpressionPickerController;

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.JDynFormFieldFactory;

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

public class JDynFormFieldExpression extends AbstractJDynFormField implements JDynFormField, FocusListener {

    protected Expression assignedValue = null;

    protected Expression currentValue = null;

    protected JTextComponent jtext = null;

    protected JButton btnBuilder = null;

    protected JButton btnHistory = null;

    protected JButton btnBookmarks = null;

    protected boolean readonly = false;

    private ExpressionPickerController pickerController;

    public JDynFormFieldExpression(

            DynFormSPIManager serviceManager, 

            DynFormSPIManager.ComponentsFactory componentsFactory,

            JDynFormFieldFactory factory, 

            DynFormFieldDefinition definition,

            Object value

            ) {

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

        this.assignedValue = (Expression) value;

    }

    @Override

    public void setReadOnly(boolean readonly) {

        super.setReadOnly(readonly);

        if (this.contents != null) {

            if (this.readonly) {

                this.pickerController.setEditable(false);

            } else {

                this.pickerController.setEditable(true);

            }

        }

    }

    @Override

    public Object getAssignedValue() {

        return this.assignedValue;

    }

    @Override

    public void initComponent() {

        this.contents = new JPanel();

        this.jtext = this.getComponentsFactory().getJTextField(this.getDefinition(), null);

        this.jtext.addFocusListener(this);

        this.btnBuilder = this.getComponentsFactory().getJButton(this.getDefinition(), null);

        this.btnHistory = this.getComponentsFactory().getJButton(this.getDefinition(), "History");

        this.btnBookmarks = this.getComponentsFactory().getJButton(this.getDefinition(), "Bookmarks");

        ExpressionEvaluatorSwingManager expressionSwingManager = ExpressionEvaluatorSwingLocator.getManager();

        this.pickerController = expressionSwingManager.createExpressionPickerController(

                jtext, 

                btnBuilder, 

                btnHistory, 

                btnBookmarks

        );

        if (this.readonly) {

            this.pickerController.setEditable(false);

        } else {

            this.pickerController.setEditable(true);

        }

        if( !this.getComponentsFactory().containsJTextField(this.getDefinition(), null) ) {

            this.createLayout();

        }

        this.setValue(this.assignedValue);

    }

    private void createLayout() {

        java.awt.GridBagConstraints gridBagConstraints;

        java.awt.GridBagLayout layout = new java.awt.GridBagLayout();

//        layout.columnWidths = new int[] {0, 5, 0, 5, 0, 5, 0};

//        layout.rowHeights = new int[] {0};

        this.contents.setLayout(layout);

        gridBagConstraints = new java.awt.GridBagConstraints();

        gridBagConstraints.gridx = 0;

        gridBagConstraints.gridy = 0;

        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;

        gridBagConstraints.weightx = 0.5;

        this.contents.add(this.jtext, gridBagConstraints);

        if( this.btnBuilder!= null ) {

            gridBagConstraints = new java.awt.GridBagConstraints();

            gridBagConstraints.gridx = 2;

            gridBagConstraints.gridy = 0;

            this.contents.add(this.btnBuilder, gridBagConstraints);

        }

        if( this.btnHistory!= null ) {

            gridBagConstraints = new java.awt.GridBagConstraints();

            gridBagConstraints.gridx = 4;

            gridBagConstraints.gridy = 0;

            this.contents.add(this.btnHistory, gridBagConstraints);

        }

        if( this.btnBookmarks!= null ) {

            gridBagConstraints = new java.awt.GridBagConstraints();

            gridBagConstraints.gridx = 6;

            gridBagConstraints.gridy = 0;

            this.contents.add(this.btnBookmarks, gridBagConstraints);        

        }

    }

    private void fireFieldChangedEventIfChanged(Expression previous) {

        if (previous == null) {

            if (this.currentValue == null) {

                return;

            }

            this.fireFieldChangedEvent();

            return;

        }

        if (this.currentValue == null) {

            this.fireFieldChangedEvent();

            return;

        }

        if ( StringUtils.equalsIgnoreCase(previous.getPhrase(),this.currentValue.getPhrase())) {

            this.fireFieldChangedEvent();

        }

    }

    @Override

    public void setValue(Object value) {

        Expression previous = this.currentValue;

        if( value instanceof CharSequence ) {

            value = ExpressionUtils.createExpression(value.toString());

        }

        if (value != null && !(value instanceof Expression)) {

            LOGGER.info("setValue invoked with non File value (" + value.toString() + ").");

            return;

        }

        this.pickerController.set(null);

        this.assignedValue = (Expression) value;

        this.currentValue = this.assignedValue;

        this.fireFieldChangedEventIfChanged(previous);

    }

    @Override

    public Object getValue() {

        return this.pickerController.get();

    }

    @Override

    public boolean hasValidValue() {

        return true;

    }

    @Override

    public void focusGained(FocusEvent arg0) {

        fireFieldEnterEvent();

        this.problemIndicator().restore();

    }

    @Override

    public void focusLost(FocusEvent arg0) {

        fireFieldExitEvent();

    }

    @Override

    public void clear() {

        this.pickerController.set(null);

    }

}