com.totsp.gwittir.client.validator.PopupValidationFeedback.java Source code

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Here is the source code for com.totsp.gwittir.client.validator.PopupValidationFeedback.java

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/*
 * PopupValidationFeedback.java
 *
 * Created on July 16, 2007, 7:29 PM
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package com.totsp.gwittir.client.validator;

import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;
import com.totsp.gwittir.client.beans.SourcesPropertyChangeEvents;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.HashMap;

/**
 *
 * @author <a href="mailto:cooper@screaming-penguin.com">Robert "kebernet" Cooper</a>
 */
public class PopupValidationFeedback extends AbstractValidationFeedback {
    public static final int LEFT = 1;
    public static final int TOP = 2;
    public static final int RIGHT = 3;
    public static final int BOTTOM = 4;
    final HashMap popups = new HashMap();
    final HashMap listeners = new HashMap();
    private int position;

    /** Creates a new instance of PopupValidationFeedback */
    public PopupValidationFeedback(int position) {
        this.position = position;
    }

    public void handleException(Object source, ValidationException exception) {
        final Widget w = (Widget) source;
        final PopupPanel p = new PopupPanel(false);
        popups.put(source, p);
        p.setStyleName("gwittir-ValidationPopup");
        p.setWidget(new Label(this.getMessage(exception)));
        p.setPopupPosition(-5000, -5000);
        p.show();
        if (this.position == BOTTOM) {
            p.setPopupPosition(w.getAbsoluteLeft(), w.getAbsoluteTop() + w.getOffsetHeight());
        } else if (this.position == RIGHT) {
            p.setPopupPosition(w.getAbsoluteLeft() + w.getOffsetWidth(), w.getAbsoluteTop());
        } else if (this.position == LEFT) {
            p.setPopupPosition(w.getAbsoluteLeft() - p.getOffsetWidth(), w.getAbsoluteTop());
        } else if (this.position == TOP) {
            p.setPopupPosition(w.getAbsoluteLeft(), w.getAbsoluteTop() - p.getOffsetHeight());
        }
        if (w instanceof SourcesPropertyChangeEvents) {
            GWT.log("is PCE", null);
            PropertyChangeListener attachListener = new PropertyChangeListener() {
                public void propertyChange(PropertyChangeEvent propertyChangeEvent) {
                    if (((Boolean) propertyChangeEvent.getNewValue()).booleanValue()) {
                        p.setVisible(true);
                    } else {
                        p.setVisible(false);
                    }
                }

            };
            listeners.put(w, attachListener);
            ((SourcesPropertyChangeEvents) w).addPropertyChangeListener("attached", attachListener);
            ((SourcesPropertyChangeEvents) w).addPropertyChangeListener("visible", attachListener);
        }
    }

    public void resolve(Object source) {
        PopupPanel p = (PopupPanel) popups.get(source);
        if (p != null) {
            p.hide();
            popups.remove(source);
            if (listeners.containsKey(source)) {
                try {
                    ((SourcesPropertyChangeEvents) source).removePropertyChangeListener("attach",
                            (PropertyChangeListener) listeners.remove(source));
                    ((SourcesPropertyChangeEvents) source).removePropertyChangeListener("visible",
                            (PropertyChangeListener) listeners.remove(source));

                } catch (RuntimeException re) {
                    re.printStackTrace();
                }
            }
        }
    }

}