Application: gvSIG desktop » Library: org.gvsig.tools

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package org.gvsig.tools.swing.impl;

import java.awt.BorderLayout;

import java.awt.Component;

import java.awt.Cursor;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.beans.PropertyChangeEvent;

import javax.swing.BorderFactory;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JComponent;

import javax.swing.JPanel;

import javax.swing.JSpinner;

import javax.swing.text.JTextComponent;

import org.apache.commons.lang3.StringUtils;

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

import org.gvsig.tools.swing.icontheme.IconTheme;

import org.gvsig.tools.swing.icontheme.IconThemeManager;

import org.gvsig.tools.swing.impl.pickercontroller.nullablespinner.NullableEditor;

/**

 *

 * @author jjdelcerro

 */

public class ClearButtonUtils {

    private static final String CLEAR_BUTTON_NAME = "ClearButton";

    private static ImageIcon getIcon(String name) {

        IconThemeManager iconThemeManager = ToolsSwingLocator.getIconThemeManager();

        IconTheme theme = iconThemeManager.getCurrent();

        ImageIcon icon = theme.get(name);

        return icon;

    }

    public static boolean hasClearButton(final JComponent component) {

        final JTextComponent text = getTextComponent(component);

        for (Component aComponent : text.getComponents()) {

            if( aComponent instanceof JButton && 

                    StringUtils.equalsIgnoreCase(CLEAR_BUTTON_NAME, aComponent.getName()) ) {

                return true;

            }

        }

        return false;

    }

    public static void addClearButton(final JComponent component) {

        addClearButton(component, null);

    }

    private static class ClearButtonPanel extends JPanel {

    }

    public static void addClearButton(final JComponent component, final ActionListener action) {

        final JTextComponent text = getTextComponent(component);

        if( text == null ) {

            return;

        }

        JPanel panel = null;

        JButton btnClear = null;

        for (Component aComponent : text.getComponents()) {

            if (aComponent instanceof ClearButtonPanel ) {

                panel = (JPanel) aComponent;

                btnClear = (JButton) panel.getComponent(0);

                for (ActionListener l : btnClear.getActionListeners()) {

                    btnClear.removeActionListener(l);

                }

            }

        }

        if( btnClear==null ) {

            panel = new ClearButtonPanel();

            btnClear = new JButton(getIcon("picker-cleartext"));

            panel.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));

            btnClear.setFocusable(false);

            btnClear.setBorderPainted(false);

            btnClear.setBorder(BorderFactory.createEmptyBorder(0, 1, 0, 2));

            btnClear.setBorderPainted(false);

            btnClear.setFocusPainted(false);

            btnClear.setContentAreaFilled(false);

            btnClear.setOpaque(false);

            btnClear.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));

            btnClear.setName(CLEAR_BUTTON_NAME);

            panel.setOpaque(false);

            panel.setLayout(new BorderLayout());

            panel.add(btnClear, BorderLayout.NORTH);

            text.setLayout(new BorderLayout());

            text.add(panel, BorderLayout.EAST);

//            try {

//                Insets originalMargin = text.getMargin();

//                text.setMargin(

//                    new Insets(

//                            originalMargin.top, 

//                            originalMargin.left, 

//                            originalMargin.bottom, 

//                            panel.getPreferredSize().width

//                    )

//                );

//            } catch(Exception ex) {

//                ex.getCause(); // To allow set break points

//                // Ignore exceptions

//            }

            JButton button = btnClear;

            text.addPropertyChangeListener((PropertyChangeEvent evt) -> {

                if (evt == null) {

                    return;

                }

                if (evt.getPropertyName().equalsIgnoreCase("enabled")) {

                    boolean enabled = text.isEnabled();

                    button.setEnabled(enabled);

                } else if (evt.getPropertyName().equalsIgnoreCase("editable")) {

                    boolean editable = text.isEditable();

                    button.setEnabled(editable);

                }

            });

        }

        if (action == null) {

            btnClear.addActionListener((ActionEvent e) -> {

                if(component instanceof JComboBox){

                    ((JComboBox)component).setSelectedIndex(-1);

                } else {

                    text.setText("");

                }

            });

        } else {

            btnClear.addActionListener(action);

        }

    }

    public static void removeClearButton(final JComponent component) {

        final JTextComponent text = getTextComponent(component);

        for (Component aComponent : text.getComponents()) {

            if (aComponent instanceof ClearButtonPanel ) {

                JPanel panel = (JPanel) aComponent;

                JButton btnClear = (JButton) panel.getComponent(0);

                for (ActionListener l : btnClear.getActionListeners()) {

                    btnClear.removeActionListener(l);

                }

                text.remove(panel);

                return;

            }

        }

    }

    public static JTextComponent getTextComponent(JComponent x) {

        if( x instanceof JTextComponent ) {

            return (JTextComponent) x;

        }

        if( x instanceof JComboBox ) {

            Component  xx = ((JComboBox)x).getEditor().getEditorComponent();

            if( xx instanceof JTextComponent ) {

                return (JTextComponent) xx;

            }

            return null;

        }

        if( x instanceof JSpinner ) {

            JComponent editor = ((JSpinner) x).getEditor();

            if( editor instanceof NullableEditor) {

                return ((NullableEditor) editor).getTextField();

            }

            if( editor instanceof JSpinner.DefaultEditor ) {

                return ((JSpinner.DefaultEditor) editor).getTextField();

            }

        }

        return null;

    }

}