swingformbuilder.java

CRMS客户关系管理系统(JAVA版）,这是一个客户关系管理系统。

    /* CRMS, customer relationship management system
    Copyright (C) 2003  Service To Youth Council

    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 2 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    For further information contact the SYC ICT department on [e-mail]
    98 Kermode Street
    North Adelaide
    South Australia
    SA 5006 
    [phone]
    */
/*
 * FormBuilder.java
 *
 * Created on 11 April 2003, 07:02
 */

package crms.form;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import mseries.Calendar.*;
import mseries.ui.*;

/**
 *
 * @author  dmurphy
 */
public class SwingFormBuilder {
    
    private FormPanel panel = null;
    private static SwingFormBuilder _instance = null;
    
    /** Creates a new instance of FormBuilder */
    private SwingFormBuilder() {
    }
    
    public static SwingFormBuilder getInstance() {
        if (_instance == null) {
            _instance = new SwingFormBuilder();
        }
        return _instance;
    }
    
    public FormPanel buildForm ( Form form ) {
        
        panel = new FormPanel();
        panel.setForm(form);
        
        panel.setLayout(new BorderLayout());
        
        if (form.getTitle() != null) {
            JPanel titlePanel = new JPanel(new BorderLayout());
            JLabel label = new JLabel(form.getTitle());

            label.setBackground(Color.WHITE);
            label.setHorizontalAlignment(JLabel.CENTER);
            
            titlePanel.add(label, BorderLayout.CENTER);
            titlePanel.setBackground(Color.WHITE);
            
            panel.add( titlePanel, BorderLayout.NORTH);
        }
        
        JPanel bodyPanel = new JPanel();
        bodyPanel.setLayout(new GridBagLayout());
        bodyPanel.setBackground(Color.WHITE);
        for (int i=0; i < form.getFieldCount(); i++ ) {
            FormField field = form.getField(i);
        
            Component widget = getWidgetForField(field, panel);
            bodyPanel.add( widget, getGridBagConstraints(field));

        }
        
        panel.add(bodyPanel, BorderLayout.CENTER);
        
        return panel;
    }

    public GridBagConstraints getGridBagConstraints(FormField field) {
     
        int ipadx = 0;
        int ipady = 0;
        
        if (field.getType() == FieldType.TEXTAREA) {
            ipadx = 45;
            ipady = 44;
        }
        
        GridBagConstraints cons = new GridBagConstraints(
            field.getLocation().getX(),
            field.getLocation().getY(), 
            field.getLocation().getWidth(),
            field.getLocation().getHeight(),
            0.0,
            0.0,
            GridBagConstraints.CENTER,
            GridBagConstraints.HORIZONTAL, 
            new Insets(5,10,0,0),
            ipadx,
            ipady);
        
        return cons;
    }
    
    public Component getWidgetForField( FormField field, FormPanel panel ) {
        
        FieldType type = field.getType();
        
        if (type == FieldType.SUBMIT_BUTTON ||
            type == FieldType.RESET_BUTTON ||
            type == FieldType.CANCEL_BUTTON) {
            
            JButton button = new JButton(field.getText());
            
            if (type == FieldType.SUBMIT_BUTTON) {
                button.addActionListener( new ActionListener() {
                    public void actionPerformed(ActionEvent ev) {
                        submitClicked(ev);
                    }
                });
            } else if (type == FieldType.RESET_BUTTON) {
                button.addActionListener( new ActionListener() {
                    public void actionPerformed(ActionEvent ev) {
                        resetClicked(ev);
                    }
                });
            } else if (type == FieldType.CANCEL_BUTTON) {
                button.addActionListener(  new ActionListener() {
                    public void actionPerformed(ActionEvent ev) {
                        cancelClicked(ev);
                    }
                });
            }
            panel.addWidget(field.getName(), button);
            return button;
            
        } else if (type == FieldType.CHECKBOX) {
            
            JCheckBox checkBox = new JCheckBox();
            final String fieldName = field.getName();
            checkBox.addItemListener( new ItemListener() {
                public void itemStateChanged(ItemEvent e) {
                    if (e.getStateChange() == ItemEvent.SELECTED) {
                        checkBoxChanged(fieldName, true);
                    } else {
                        checkBoxChanged(fieldName, false);
                    }
                }
            });
            panel.addWidget(field.getName(), checkBox);
            return checkBox;
            
        } else if (type == FieldType.DATE) {
            MDateEntryField dateField = new MDateEntryField();
            MDefaultPullDownConstraints c = new MDefaultPullDownConstraints();
            c.firstDay = java.util.Calendar.MONDAY;
            dateField.setConstraints(c);
            MSimpleDateFormat dateFormat = new MSimpleDateFormat("d MMMM, yyyy");
            dateField.setDateFormatter(dateFormat);
            
            panel.addWidget(field.getName(), dateField);
            return dateField;
            
        } else if (type == FieldType.DROPDOWN_LIST) {
            
            DefaultComboBoxModel model = new DefaultComboBoxModel();
            String defaultOption = field.getDefaultOption();

            FieldOption def = null;
            
            for (int i=0; i < field.getOptionCount(); i++) {
                FieldOption option = field.getOption(i);
                model.addElement(option);
                if (option.getCode().equals(defaultOption)) {
                    def = option;
                }
            }
            JComboBox combo = new JComboBox(model);
            model.setSelectedItem(def);
            panel.addWidget(field.getName(), combo);
            
            return combo;
            
        } else if (type == FieldType.LABEL) {
            
            JLabel label = new JLabel(field.getText());
            panel.addWidget(field.getName(), label);
            return label;
            
        } else if (type == FieldType.TEXTAREA) {
            
            int width = field.getInternalSize().getWidth();
            
            if (width < 1) {
                width = 20;
            }
            
            int height = field.getInternalSize().getHeight();
            
            if (height < 1) {
                height = 4;
            }
            
            JTextArea textArea = new JTextArea(width, height);
            textArea.setText(field.getText());

            JScrollPane scrollPane = new JScrollPane(textArea);
            panel.addWidget(field.getName(), textArea);
            return scrollPane;
            
        } else if (type == FieldType.TEXTFIELD) {
            JTextField textField = new JTextField();
            
            int width = field.getInternalSize().getWidth();
            
            if (width < 1) {
                width = 20;
            }
            
            textField.setColumns(width);
            textField.setText(field.getText());
            
            panel.addWidget(field.getName(), textField);
            return textField;
            
        } else if (type == FieldType.TIME) {
            MDateSpinner timeField = new MDateSpinner();

            timeField.setFormatter(new MSimpleDateFormat("h:mm a"));
            panel.addWidget(field.getName(), timeField);
            return timeField;
        }
        
        return null;
    }
    
    public void submitClicked(ActionEvent ev) {
        panel.submitButtonClicked(ev);
    }
    
    public void resetClicked(ActionEvent ev) {
        panel.resetButtonClicked(ev);
    }
    
    public void cancelClicked(ActionEvent ev) {
        panel.cancelButtonClicked(ev);
    }
    
    public void checkBoxChanged(String fieldName, boolean value) {
        panel.getResult().setFieldValue(fieldName, String.valueOf(value));
    }
}