Source Code Cross Referenced for IAbstractContext.java in  » GIS » udig-1.1 » net » refractions » udig » project » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » udig 1.1 » net.refractions.udig.project 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    uDig - User Friendly Desktop Internet GIS client
003:         *    http://udig.refractions.net
004:         *    (C) 2004, Refractions Research Inc.
005:         *
006:         *    This library is free software; you can redistribute it and/or
007:         *    modify it under the terms of the GNU Lesser General Public
008:         *    License as published by the Free Software Foundation;
009:         *    version 2.1 of the License.
010:         *
011:         *    This library is distributed in the hope that it will be useful,
012:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         *    Lesser General Public License for more details.
015:         *
016:         */
017:        package net.refractions.udig.project;
018:
019:        import java.awt.Dimension;
020:        import java.awt.Point;
021:        import java.awt.Rectangle;
022:        import java.awt.Shape;
023:        import java.awt.geom.AffineTransform;
024:        import java.io.IOException;
025:        import java.util.List;
026:
027:        import net.refractions.udig.project.render.IRenderManager;
028:        import net.refractions.udig.project.render.IViewportModel;
029:        import net.refractions.udig.project.render.displayAdapter.IMapDisplay;
030:
031:        import org.geotools.feature.FeatureCollection;
032:        import org.geotools.geometry.jts.ReferencedEnvelope;
033:        import org.opengis.referencing.crs.CoordinateReferenceSystem;
034:        import org.opengis.referencing.operation.MathTransform2D;
035:
036:        import com.vividsolutions.jts.geom.Coordinate;
037:        import com.vividsolutions.jts.geom.Envelope;
038:        import com.vividsolutions.jts.geom.Geometry;
039:
040:        /**
041:         * Provides access to contextual information.
042:         * <p>
043:         * Toolkits are used by extensions to access Map and Project information. A Toolkit should never be
044:         * instantiated by a developer. The framework provides Toolkits to extensions.
045:         * </p>
046:         * <p>
047:         * Responsibilities:
048:         * <ul>
049:         * <li>Provide access to the objects that an extension can use for its operations.</li>
050:         * <li>Provide convenience methods for extension developers to use.</li>
051:         * <li>Provide a consistent interface for extensions which will not easily change in future
052:         * versions</li>
053:         * </ul>
054:         * </p>
055:         * 
056:         * @author Jesse
057:         * @since 0.5
058:         */
059:        public interface IAbstractContext {
060:
061:            /**
062:             * The map's viewport model.
063:             * <p>
064:             * Convenience for getMap().getViewportModel().
065:             * </p>
066:             * <p>
067:             * Called to obtain current viewport bounds and crs.
068:             * </p>
069:             * 
070:             * @return The Viewportmodel for the map.
071:             * @see IViewportModel
072:             */
073:            IViewportModel getViewportModel();
074:
075:            /**
076:             * The map's edit manager.
077:             * <p>
078:             * Convenience for getMap().getEditManager().
079:             * </p>
080:             * <p>
081:             * Called to obtain the currently editable feature.
082:             * </p>
083:             * 
084:             * @return The map's edit manager.
085:             * @see IEditManager
086:             */
087:            IEditManager getEditManager();
088:
089:            /**
090:             * The map's render manager
091:             * <p>
092:             * Convenience for getMap().getRenderManager().
093:             * </p>
094:             * <p>
095:             * Called to refresh the current display.
096:             * </p>
097:             * 
098:             * @return The RenderManager for the map.
099:             * @see IRenderManager
100:             */
101:            IRenderManager getRenderManager();
102:
103:            /**
104:             * The map's display object.
105:             * <p>
106:             * Convenience for getMap().getRenderManager().getMapDisplay().
107:             * </p>
108:             * <p>
109:             * Called to obtain the height and width of the display.
110:             * </p>
111:             * 
112:             * @return The IMapDisplay for the map.
113:             * @see IMapDisplay
114:             */
115:            IMapDisplay getMapDisplay();
116:
117:            /**
118:             * The context's map.
119:             * <p>
120:             * The Map data object.
121:             * </p>
122:             * 
123:             * @return The context's map.
124:             * @see IMap
125:             */
126:            IMap getMap();
127:
128:            /**
129:             * The map's containing Project.
130:             * <p>
131:             * Convenience for getMap().getProject().
132:             * </p>
133:             * <p>
134:             * Contains all the {@linkplain IProjectElements} in the project.
135:             * </p>
136:             * 
137:             * @return The containing Project of the map.
138:             * @see IProject
139:             */
140:            IProject getProject();
141:
142:            /**
143:             * Gets up the affine transform that will transform from the world to screen. A convenience
144:             * method.
145:             * 
146:             * @return a transform that maps from real world coordinates to the screen
147:             */
148:            AffineTransform worldToScreenTransform();
149:
150:            /**
151:             * Returns the pixel on the screen for a given coordinate in world space. A convenience method.
152:             * 
153:             * @param coord A coordinate in world space.
154:             * @return The pixel on the screen that the world coordinate is drawn on.
155:             */
156:            Point worldToPixel(Coordinate coord);
157:
158:            /**
159:             * Converts a coordinate expressed on the device space back to real world coordinates A
160:             * convenience method.
161:             * 
162:             * @param x horizontal coordinate on device space
163:             * @param y vertical coordinate on device space
164:             * @return The correspondent real world coordinate
165:             */
166:            Coordinate pixelToWorld(int x, int y);
167:
168:            /**
169:             * Creates an Envelope that is close, error to slightly larger, to the Rectangle when it is
170:             * transformed into world coordinates.
171:             * 
172:             * @param rectangle
173:             * @return
174:             */
175:            public ReferencedEnvelope worldBounds(Rectangle rectangle);
176:
177:            /**
178:             * Creates a MathTransform that will transform from the screen CRS to the world CRS.
179:             * 
180:             * @return
181:             */
182:            public MathTransform2D worldToScreenMathTransform();
183:
184:            /**
185:             * Returns the size of a pixel in world units. A convenience method.
186:             * 
187:             * @return the size of a pixel in world units.
188:             */
189:            Coordinate getPixelSize();
190:
191:            /**
192:             * Returns a world bounding box the size of a pixel at the location corresponding to the point
193:             * on the screen. A convenience method.
194:             * 
195:             * @return the size of a pixel in world units.
196:             */
197:            Envelope getPixelBoundingBox(Point screenLocation);
198:
199:            /**
200:             * Returns a world bounding box the scalefactor * (size of a pixel) at the location
201:             * corresponding to the point on the screen. A convenience method.
202:             * <p>
203:             * XXX: Can we make this a ReferencedEnvelope?
204:             * </p>
205:             * 
206:             * @return the size of a pixel in world units.
207:             */
208:            ReferencedEnvelope getBoundingBox(Point screenLocation,
209:                    int scalefactor);
210:
211:            /**
212:             * CoordinateReferenceSystem of the map.
213:             * 
214:             * @return getViewportModel().getCRS();
215:             */
216:            CoordinateReferenceSystem getCRS();
217:
218:            /**
219:             * Transform the provided envelope to a java 2d shape (in screen coordiantes).
220:             * 
221:             * @param box
222:             * @return
223:             */
224:            Shape toShape(ReferencedEnvelope envelope);
225:
226:            /**
227:             * Returns the currently Selected Layer
228:             * 
229:             * @return the currently Selected Layer
230:             */
231:            public ILayer getSelectedLayer();
232:
233:            /**
234:             * Transform the provided geometry to a java 2d shape (in screen coordiantes).
235:             * 
236:             * @param box
237:             * @return
238:             */
239:            Shape toShape(Geometry geometry, CoordinateReferenceSystem crs);
240:
241:            /**
242:             * Returns all the features that intersect with the bounding box.
243:             * 
244:             * @param source The featuresource to get features from.
245:             * @param bbox The bounding box that acts as a filter.  Must be in map coordinates.
246:             * @return all the features that intersect with the bounding box.
247:             */
248:            FeatureCollection getFeaturesInBbox(ILayer layer, Envelope bbox)
249:                    throws IOException;
250:
251:            /**
252:             * Returns the list of layers in the current map.
253:             * 
254:             * @return The list of layers in the current map.
255:             */
256:            List<ILayer> getMapLayers();
257:
258:            /**
259:             * Makes a deep copy of this object, if necessary.
260:             * This is an alternative to clone since I hate clone, it is too hard to implement.
261:             *
262:             * @return a new copy of this object.  
263:             */
264:            public IAbstractContext copy();
265:
266:            /**
267:             * Transforms the coordinate from the bounding box (bbox) to the area defined by the rectangle it starts at 0,0.  A simple
268:             * Affine transform is used and the y-axis is flipped since it is assumed the bbox is a world bbox and the Rectangle
269:             * is a cartesian like on the screen.
270:             *
271:             * @param bbox The from area
272:             * @param displaySize the to area
273:             * @param coordinate the coordinate to transform.
274:             * @return the point that the coordiante transforms to.
275:             */
276:            Point tranformCoordinate(Envelope bbox, Dimension displaySize,
277:                    Coordinate coordinate);
278:
279:        }
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