Application: gvSIG desktop

package org.gvsig.labeling.gui.layerproperties;

import java.awt.Component;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JList;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.ScrollPaneConstants;

import org.gvsig.andami.ui.mdiManager.IWindow;

import org.gvsig.andami.ui.mdiManager.WindowInfo;

import org.gvsig.app.ApplicationLocator;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.i18n.Messages;

public class LabelExpressionEditorPanel extends JPanel implements

IWindow, ActionListener, MouseListener {

        private static final String CANCEL_ACTION = "CANCEL";

        private static final String ACCEPT_ACTION = "ACCEPT";

        private static final String ADDFIELD_ACTION = "ADD_FIELD";

        private String originalValue;

        private String value;

        private WindowInfo wInfo = null;

        private String[] fieldNames;

        private int[] fieldTypes;

        private JButton botCancel;

        private JButton botAccept;

        private JButton botAddField;

        private JScrollPane spExpression;

        private JTextArea txtExpression;

        private JScrollPane spFieldList;

        private JList lstFields;

        public LabelExpressionEditorPanel(FeatureAttributeDescriptor[] atts) {

                super();

                int n = atts.length;

                this.fieldNames = new String[n];

                this.fieldTypes = new int[n];

                for (int i=0; i<n; i++) {

                        this.fieldNames[i] = atts[i].getName();

                        this.fieldTypes[i] = atts[i].getType();

                }

                initialize();

        }

        private void initialize() {

                this.setLayout(new GridBagLayout());

                GridBagConstraints baseConst = new GridBagConstraints();

                baseConst.ipadx = 2;

                baseConst.ipady = 2;

                baseConst.anchor = baseConst.CENTER;

                baseConst.insets = new Insets(2,2,2,2);

                GridBagConstraints con;

                con = (GridBagConstraints) baseConst.clone();

                con.gridx = 0;

                con.gridy = 0;

                con.gridheight = 3;

                con.gridwidth = 2;

                con.fill = con.BOTH;

                con.weightx = 1;

                con.weighty = 1;

                this.add(getFieldListComposition(), con);

                con = (GridBagConstraints) baseConst.clone();

                con.gridx = 2;

                con.gridy = 2;

                con.fill = con.NONE;

                this.add(getBotAddField(), con);

                con.gridx = 0;

                con.gridy = 3;

                con.gridheight = 4;

                con.gridwidth = 5;

                con.fill = con.BOTH;

                con.weightx = 1;

                con.weighty = 1;

                this.add(getExpressionComposition(), con);

                con = (GridBagConstraints) baseConst.clone();

                con.gridx = 3;

                con.gridy = 8;

                con.fill = con.NONE;

                this.add(getBotAccept(), con);

                con = (GridBagConstraints) baseConst.clone();

                con.gridx = 4;

                con.gridy = 8;

                con.fill = con.NONE;

                this.add(getBotCancel(), con);

        }

        private JButton getBotCancel() {

                if (botCancel == null) {

                        botCancel = new JButton(Messages.getText("cancel"));

                        botCancel.setActionCommand(CANCEL_ACTION);

                        botCancel.addActionListener(this);

                }

                return botCancel;

        }

        private JButton getBotAccept() {

                if (botAccept == null) {

                        botAccept = new JButton(Messages.getText("accept"));

                        botAccept.setActionCommand(ACCEPT_ACTION);

                        botAccept.addActionListener(this);

                }

                return botAccept;

        }

        private Component getExpressionComposition() {

                if (spExpression == null) {

                        spExpression = new JScrollPane();

                        spExpression.setViewportView(getTxtExpression());

                        spExpression.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

                        spExpression.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

                        spExpression

                                        .setBorder(BorderFactory.createTitledBorder(

                                                        Messages.getText("expression")));

                }

                return spExpression;

        }

        private JTextArea getTxtExpression() {

                if (txtExpression == null){

                        txtExpression = new JTextArea();

                }

                return txtExpression;

        }

        public void setExpression(String expr){

                this.getTxtExpression().setText(expr);

        }

        public String getExpression(){

                return this.getTxtExpression().getText();

        }

        private JButton getBotAddField() {

                if (botAddField == null) {

                        botAddField = new JButton(Messages.getText("add_field"));

                        botAddField.setActionCommand(ADDFIELD_ACTION);

                        botAddField.addActionListener(this);

                }

                return botAddField;

        }

        private Component getFieldListComposition() {

                if (spFieldList == null){

                        spFieldList = new JScrollPane();

                        spFieldList.setViewportView(getLstFields());

                        spFieldList.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

                        spFieldList.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

                        spFieldList

                                        .setBorder(BorderFactory.createTitledBorder(

                                                        Messages.getText("fields")));

                }

                return spFieldList;

        }

        private JList getLstFields() {

                if (lstFields == null){

                        lstFields = new JList(this.fieldNames);

                        lstFields.addMouseListener(this);

                }

                return lstFields;

        }

        public WindowInfo getWindowInfo() {

                if (wInfo == null) {

                        wInfo = new WindowInfo(WindowInfo.RESIZABLE

                                        + WindowInfo.MODALDIALOG);

                        wInfo.setWidth(500);

                        wInfo.setHeight(400);

                        wInfo.setTitle(Messages.getText("expression"));

                }

                return wInfo;

        }

        public Object getWindowProfile() {

                return WindowInfo.EDITOR_PROFILE;

        }

        public void setValue(String value) {

                this.originalValue = value;

                this.value = value;

                this.setExpression(value);

        }

        public String getValue() {

                return this.value;

        }

        public void actionPerformed(ActionEvent e) {

                doAction(e.getActionCommand());

        }

        private void doAction(String action){

                if (action.equals(ADDFIELD_ACTION)){

                        JTextArea txt = getTxtExpression();

                        StringBuffer strb = new StringBuffer();

                        String str = txt.getText();

                        int sini = txt.getSelectionStart();

                        int send = txt.getSelectionEnd();

                        if (sini > 0){

                                strb.append(str.substring(0, sini));

                                str = str.substring(sini);

                        }

                        // strb.append('[');

                        strb.append((String)getLstFields().getSelectedValue());

                        // strb.append(']');

                        send = send -sini;

                        if (send > 0){

                                str = str.substring(send);

                        }

                        strb.append(str);

                        getTxtExpression().setText(strb.toString());

                } else {

                        // Accept or cancel

                        if (action.equals(ACCEPT_ACTION)){

                                this.value = getExpression();

                        } else {

                                this.value = this.originalValue;

                        }

                        ApplicationLocator.getManager().getUIManager().closeWindow(this);

                }

        }

        public void mouseClicked(MouseEvent e) {

                if (e.getSource() == getLstFields()){

                        if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() > 1){

                                doAction(ADDFIELD_ACTION);

                        }

                }

        }

        public void mouseEntered(MouseEvent e) {

                // Do nothing

        }

        public void mouseExited(MouseEvent e) {

                // Do nothing

        }

        public void mousePressed(MouseEvent e) {

                // Do nothing

        }

        public void mouseReleased(MouseEvent e) {

                // Do nothing

        }

}