Source Code Cross Referenced for AbstractDriverPanel.java in  » GIS » openjump » com » vividsolutions » jump » workbench » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » openjump » com.vividsolutions.jump.workbench.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI 
003:         * for visualizing and manipulating spatial features with geometry and attributes.
004:         *
005:         * Copyright (C) 2003 Vivid Solutions
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License
009:         * as published by the Free Software Foundation; either version 2
010:         * of the License, or (at your option) any later version.
011:         * 
012:         * This program is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015:         * GNU General Public License for more details.
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * along with this program; if not, write to the Free Software
019:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
020:         * 
021:         * For more information, contact:
022:         *
023:         * Vivid Solutions
024:         * Suite #1A
025:         * 2328 Government Street
026:         * Victoria BC  V8T 5G5
027:         * Canada
028:         *
029:         * (250)385-6040
030:         * www.vividsolutions.com
031:         */
032:
033:        package com.vividsolutions.jump.workbench.ui;
034:
035:        import java.awt.BorderLayout;
036:        import java.awt.event.ActionListener;
037:
038:        import javax.swing.JPanel;
039:
040:        import com.vividsolutions.jts.util.Assert;
041:
042:        /**
043:         * UI for AbstractDrivers. Must supply OK and Cancel buttons (for example, using
044:         * OKCancelPanel).
045:         */
046:
047:        //JBuilder displays this component as a "Red Bean". There's a trick to
048:        //displaying it -- see test.AbstractDriverPanelProxy and
049:        //http://www.visi.com/~gyles19/fom-serve/cache/97.html. [Jon Aquino]
050:        public abstract class AbstractDriverPanel extends JPanel {
051:            BorderLayout borderLayout = new BorderLayout();
052:
053:            public AbstractDriverPanel() {
054:                //Don't let JBuilder create a jbInit method and call it here.
055:                //It will cause a tricky bug:
056:                //  1. The subclass' jbInit will be called
057:                //  2. A NullPointerException will occur because the subclass' jbInit
058:                //     will perform operations on instance variables that have not yet been
059:                //     initialized.
060:                //[Jon Aquino]
061:            }
062:
063:            /**
064:             * Adds an ActionListener that should be notified when the user presses
065:             * this panel's OK or Cancel button.
066:             */
067:            public abstract void addActionListener(ActionListener l);
068:
069:            public abstract void removeActionListener(ActionListener l);
070:
071:            public abstract boolean wasOKPressed();
072:
073:            public boolean isInputValid() {
074:                return null == getValidationError();
075:            }
076:
077:            /**
078:             * Attempts to restore as many panel values as possible to a previous state,
079:             * to save the user some typing. Subclasses overriding this method should
080:             * call the superclass method first.
081:             * @param cache not null
082:             */
083:            public void setCache(DriverPanelCache cache) {
084:                Assert.isTrue(cache != null);
085:            }
086:
087:            /**
088:             * Returns the current panel values. Subclasses overriding this method should
089:             * call the superclass method first. DriverDialog takes care of merging
090:             * the returned cache with the original cache.
091:             */
092:            public DriverPanelCache getCache() {
093:                return new DriverPanelCache();
094:            }
095:
096:            /**
097:             * @return null if there are no validation errors; otherwise, an error message
098:             */
099:            public String getValidationError() {
100:                return null;
101:            }
102:        }
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