Source Code Cross Referenced for OrderedLayout.java in  » Web-Framework » Millstone » org » millstone » base » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » Millstone » org.millstone.base.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* *************************************************************************
002:         
003:                                        Millstone(TM) 
004:                           Open Sourced User Interface Library for
005:                               Internet Development with Java
006:
007:                     Millstone is a registered trademark of IT Mill Ltd
008:                          Copyright (C) 2000-2005 IT Mill Ltd
009:                             
010:         *************************************************************************
011:
012:           This library is free software; you can redistribute it and/or
013:           modify it under the terms of the GNU Lesser General Public
014:           license version 2.1 as published by the Free Software Foundation.
015:
016:           This library is distributed in the hope that it will be useful,
017:           but WITHOUT ANY WARRANTY; without even the implied warranty of
018:           MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
019:           Lesser General Public License for more details.
020:
021:           You should have received a copy of the GNU Lesser General Public
022:           License along with this library; if not, write to the Free Software
023:           Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
024:
025:         *************************************************************************
026:           
027:           For more information, contact:
028:           
029:           IT Mill Ltd                           phone: +358 2 4802 7180
030:           Ruukinkatu 2-4                        fax:  +358 2 4802 7181
031:           20540, Turku                          email: info@itmill.com
032:           Finland                               company www: www.itmill.com
033:           
034:           Primary source for MillStone information and releases: www.millstone.org
035:
036:         ********************************************************************** */
037:
038:        package org.millstone.base.ui;
039:
040:        import org.millstone.base.terminal.PaintTarget;
041:        import org.millstone.base.terminal.PaintException;
042:        import java.util.Iterator;
043:        import java.util.LinkedList;
044:
045:        /** Ordered layout.
046:         *
047:         * Ordered layout is a component container, which shows the subcomponents in the
048:         * order of their addition in specified orientation.
049:         *
050:         * @author IT Mill Ltd.
051:         * @version 3.1.1
052:         * @since 3.0
053:         */
054:        public class OrderedLayout extends AbstractComponentContainer implements 
055:                Layout {
056:
057:            /* Predefined orientations ***************************************** */
058:
059:            /** Components are to be layed out vertically. */
060:            public static int ORIENTATION_VERTICAL = 0;
061:            /** Components are to be layed out horizontally. */
062:            public static int ORIENTATION_HORIZONTAL = 1;
063:
064:            /** Custom layout slots containing the components */
065:            private LinkedList components = new LinkedList();
066:
067:            /** Orientation of the layout. */
068:            private int orientation;
069:
070:            /** Create a new ordered layout.
071:             * The order of the layout is ORIENTATION_VERTICAL.
072:             */
073:            public OrderedLayout() {
074:                orientation = ORIENTATION_VERTICAL;
075:            }
076:
077:            /** Create a new ordered layout.
078:             * The orientation of the layout is given as parameters.
079:             *
080:             * @param orientation Orientation of the layout.
081:             */
082:            public OrderedLayout(int orientation) {
083:                this .orientation = orientation;
084:            }
085:
086:            /** Get component UIDL tag.
087:             * @return Component UIDL tag as string.
088:             */
089:            public String getTag() {
090:                return "orderedlayout";
091:            }
092:
093:            /** Add a component into this container. The component is added to the
094:             * right or under the previous component.
095:             * @param c The component to be added.
096:             */
097:            public void addComponent(Component c) {
098:                components.add(c);
099:                super .addComponent(c);
100:                requestRepaint();
101:            }
102:
103:            /** Add a component into this container. The component is added to the
104:             * left or on top of the other components.
105:             * @param c The component to be added.
106:             */
107:            public void addComponentAsFirst(Component c) {
108:                components.addFirst(c);
109:                super .addComponent(c);
110:                requestRepaint();
111:            }
112:
113:            /** Add a component into indexed position in this container. 
114:             * @param c The component to be added.
115:             * @param index Index of the component position. 
116:             * The components currently in and after the position are shifted forwards.
117:             */
118:            public void addComponent(Component c, int index) {
119:                components.add(index, c);
120:                super .addComponent(c);
121:                requestRepaint();
122:            }
123:
124:            /** Remove a component from this container.
125:             * @param c The component to be removed.
126:             */
127:            public void removeComponent(Component c) {
128:                super .removeComponent(c);
129:                components.remove(c);
130:                requestRepaint();
131:            }
132:
133:            /** Get component container iterator for going trough all the components in
134:             * the container.
135:             * @return Iterator of the components inside the container.
136:             */
137:            public Iterator getComponentIterator() {
138:                return components.iterator();
139:            }
140:
141:            /** Paint the content of this component.
142:             * @param event PaintEvent.
143:             * @throws PaintException The paint operation failed.
144:             */
145:            public void paintContent(PaintTarget target) throws PaintException {
146:
147:                // Add the attributes: orientation 
148:                // note that the default values (b/vertival) are omitted
149:                if (orientation == ORIENTATION_HORIZONTAL)
150:                    target.addAttribute("orientation", "horizontal");
151:
152:                // Add all items in all the locations
153:                for (Iterator i = components.iterator(); i.hasNext();) {
154:                    Component c = (Component) i.next();
155:                    if (c != null) {
156:                        c.paint(target);
157:                    }
158:                }
159:            }
160:
161:            /** Get the orientation of the container.
162:             * @return Value of property orientation.
163:             */
164:            public int getOrientation() {
165:                return this .orientation;
166:            }
167:
168:            /** Set the orientation of the container.
169:             * @param orientation New value of property orientation.
170:             */
171:            public void setOrientation(int orientation) {
172:
173:                // Check the validity of the argument
174:                if (orientation < ORIENTATION_VERTICAL
175:                        || orientation > ORIENTATION_HORIZONTAL)
176:                    throw new IllegalArgumentException();
177:
178:                this .orientation = orientation;
179:            }
180:
181:            /* Documented in superclass */
182:            public void replaceComponent(Component oldComponent,
183:                    Component newComponent) {
184:
185:                // Get the locations            
186:                int oldLocation = -1;
187:                int newLocation = -1;
188:                int location = 0;
189:                for (Iterator i = components.iterator(); i.hasNext();) {
190:                    Component component = (Component) i.next();
191:
192:                    if (component == oldComponent)
193:                        oldLocation = location;
194:                    if (component == newComponent)
195:                        newLocation = location;
196:
197:                    location++;
198:                }
199:
200:                if (oldLocation == -1)
201:                    addComponent(newComponent);
202:                else if (newLocation == -1) {
203:                    removeComponent(oldComponent);
204:                    addComponent(newComponent, oldLocation);
205:                } else {
206:                    if (oldLocation > newLocation) {
207:                        components.remove(oldComponent);
208:                        components.add(newLocation, oldComponent);
209:                        components.remove(newComponent);
210:                        components.add(oldLocation, newComponent);
211:                    } else {
212:                        components.remove(newComponent);
213:                        components.add(oldLocation, newComponent);
214:                        components.remove(oldComponent);
215:                        components.add(newLocation, oldComponent);
216:                    }
217:
218:                    requestRepaint();
219:                }
220:            }
221:        }
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