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|---|---|---|
| 1 | /* | |
| 2 | * Copyright (c) 2005, the JUNG Project and the Regents of the University | |
| 3 | * of California | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * This software is open-source under the BSD license; see either | |
| 7 | * "license.txt" or | |
| 8 | * http://jung.sourceforge.net/license.txt for a description. | |
| 9 | * Created on Mar 8, 2005 | |
| 10 | * | |
| 11 | */ | |
| 12 | package edu.uci.ics.jung.visualization.control; | |
| 13 | ||
| 14 | import java.awt.Color; | |
| 15 | import java.awt.Cursor; | |
| 16 | import java.awt.Graphics; | |
| 17 | import java.awt.Graphics2D; | |
| 18 | import java.awt.Point; | |
| 19 | import java.awt.event.InputEvent; | |
| 20 | import java.awt.event.MouseEvent; | |
| 21 | import java.awt.event.MouseListener; | |
| 22 | import java.awt.event.MouseMotionListener; | |
| 23 | import java.awt.geom.Point2D; | |
| 24 | import java.awt.geom.Rectangle2D; | |
| 25 | import java.util.ConcurrentModificationException; | |
| 26 | import java.util.Iterator; | |
| 27 | ||
| 28 | import javax.swing.JComponent; | |
| 29 | ||
| 30 | import edu.uci.ics.jung.graph.Edge; | |
| 31 | import edu.uci.ics.jung.graph.Vertex; | |
| 32 | import edu.uci.ics.jung.visualization.Layout; | |
| 33 | import edu.uci.ics.jung.visualization.PickSupport; | |
| 34 | import edu.uci.ics.jung.visualization.PickedState; | |
| 35 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
| 36 | import edu.uci.ics.jung.visualization.VisualizationViewer.Paintable; | |
| 37 | ||
| 38 | /** | |
| 39 | * PickingGraphMousePlugin supports the picking of graph elements | |
| 40 | * with the mouse. MouseButtonOne picks a single vertex | |
| 41 | * or edge, and MouseButtonTwo adds to the set of selected Vertices | |
| 42 | * or Edges. If a Vertex is selected and the mouse is dragged while | |
| 43 | * on the selected Vertex, then that Vertex will be repositioned to | |
| 44 | * follow the mouse until the button is released. | |
| 45 | * | |
| 46 | * @author Tom Nelson | |
| 47 | */ | |
| 48 | public class PickingGraphMousePlugin extends AbstractGraphMousePlugin | |
| 49 | implements MouseListener, MouseMotionListener { | |
| 50 | ||
| 51 | /** | |
| 52 | * the picked Vertex, if any | |
| 53 | */ | |
| 54 | protected Vertex vertex; | |
| 55 | ||
| 56 | /** | |
| 57 | * the picked Edge, if any | |
| 58 | */ | |
| 59 | protected Edge edge; | |
| 60 | ||
| 61 | /** | |
| 62 | * the x distance from the picked vertex center to the mouse point | |
| 63 | */ | |
| 64 | protected double offsetx; | |
| 65 | ||
| 66 | /** | |
| 67 | * the y distance from the picked vertex center to the mouse point | |
| 68 | */ | |
| 69 | protected double offsety; | |
| 70 | ||
| 71 | /** | |
| 72 | * controls whether the Vertices may be moved with the mouse | |
| 73 | */ | |
| 74 | protected boolean locked; | |
| 75 | ||
| 76 | /** | |
| 77 | * additional modifiers for the action of adding to an existing | |
| 78 | * selection | |
| 79 | */ | |
| 80 | protected int addToSelectionModifiers; | |
| 81 | ||
| 82 | /** | |
| 83 | * used to draw a rectangle to contain picked vertices | |
| 84 | */ | |
| 85 | 0 | protected Rectangle2D rect = new Rectangle2D.Float(); |
| 86 | ||
| 87 | /** | |
| 88 | * the Paintable for the lens picking rectangle | |
| 89 | */ | |
| 90 | protected Paintable lensPaintable; | |
| 91 | ||
| 92 | /** | |
| 93 | * color for the picking rectangle | |
| 94 | */ | |
| 95 | 0 | protected Color lensColor = Color.cyan; |
| 96 | ||
| 97 | /** | |
| 98 | * create an instance with default settings | |
| 99 | */ | |
| 100 | public PickingGraphMousePlugin() { | |
| 101 | 0 | this(InputEvent.BUTTON1_MASK, InputEvent.BUTTON1_MASK | InputEvent.SHIFT_MASK); |
| 102 | 0 | } |
| 103 | ||
| 104 | /** | |
| 105 | * create an instance with overides | |
| 106 | * @param selectionModifiers for primary selection | |
| 107 | * @param addToSelectionModifiers for additional selection | |
| 108 | */ | |
| 109 | public PickingGraphMousePlugin(int selectionModifiers, int addToSelectionModifiers) { | |
| 110 | 0 | super(selectionModifiers); |
| 111 | 0 | this.addToSelectionModifiers = addToSelectionModifiers; |
| 112 | 0 | this.lensPaintable = new LensPaintable(); |
| 113 | 0 | this.cursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR); |
| 114 | 0 | } |
| 115 | ||
| 116 | /** | |
| 117 | * @return Returns the lensColor. | |
| 118 | */ | |
| 119 | public Color getLensColor() { | |
| 120 | 0 | return lensColor; |
| 121 | } | |
| 122 | ||
| 123 | /** | |
| 124 | * @param lensColor The lensColor to set. | |
| 125 | */ | |
| 126 | public void setLensColor(Color lensColor) { | |
| 127 | 0 | this.lensColor = lensColor; |
| 128 | 0 | } |
| 129 | ||
| 130 | /** | |
| 131 | * a Paintable to draw the rectangle used to pick multiple | |
| 132 | * Vertices | |
| 133 | * @author Tom Nelson - RABA Technologies | |
| 134 | * | |
| 135 | */ | |
| 136 | class LensPaintable implements Paintable { | |
| 137 | ||
| 138 | public void paint(Graphics g) { | |
| 139 | Color oldColor = g.getColor(); | |
| 140 | g.setColor(lensColor); | |
| 141 | ((Graphics2D)g).draw(rect); | |
| 142 | g.setColor(oldColor); | |
| 143 | } | |
| 144 | ||
| 145 | public boolean useTransform() { | |
| 146 | return false; | |
| 147 | } | |
| 148 | } | |
| 149 | ||
| 150 | /** | |
| 151 | * For primary modifiers (default, MouseButton1): | |
| 152 | * pick a single Vertex or Edge that | |
| 153 | * is under the mouse pointer. If no Vertex or edge is under | |
| 154 | * the pointer, unselect all picked Vertices and edges, and | |
| 155 | * set up to draw a rectangle for multiple selection | |
| 156 | * of contained Vertices. | |
| 157 | * For additional selection (default Shift+MouseButton1): | |
| 158 | * Add to the selection, a single Vertex or Edge that is | |
| 159 | * under the mouse pointer. If a previously picked Vertex | |
| 160 | * or Edge is under the pointer, it is un-picked. | |
| 161 | * If no vertex or Edge is under the pointer, set up | |
| 162 | * to draw a multiple selection rectangle (as above) | |
| 163 | * but do not unpick previously picked elements. | |
| 164 | * | |
| 165 | * @param e the event | |
| 166 | */ | |
| 167 | public void mousePressed(MouseEvent e) { | |
| 168 | 0 | down = e.getPoint(); |
| 169 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 170 | 0 | PickSupport pickSupport = vv.getPickSupport(); |
| 171 | 0 | PickedState pickedState = vv.getPickedState(); |
| 172 | 0 | if(pickSupport != null && pickedState != null) { |
| 173 | 0 | Layout layout = vv.getGraphLayout(); |
| 174 | 0 | if(e.getModifiers() == modifiers) { |
| 175 | 0 | vv.addPostRenderPaintable(lensPaintable); |
| 176 | 0 | rect.setFrameFromDiagonal(down,down); |
| 177 | // p is the screen point for the mouse event | |
| 178 | 0 | Point2D p = e.getPoint(); |
| 179 | // take away the view transform | |
| 180 | 0 | Point2D ip = vv.inverseViewTransform(p); |
| 181 | ||
| 182 | 0 | vertex = pickSupport.getVertex(ip.getX(), ip.getY()); |
| 183 | 0 | if(vertex != null) { |
| 184 | 0 | if(pickedState.isPicked(vertex) == false) { |
| 185 | 0 | pickedState.clearPickedVertices(); |
| 186 | 0 | pickedState.pick(vertex, true); |
| 187 | } | |
| 188 | // layout.getLocation applies the layout transformer so | |
| 189 | // q is transformed by the layout transformer only | |
| 190 | 0 | Point2D q = layout.getLocation(vertex); |
| 191 | // transform the mouse point to graph coordinate system | |
| 192 | 0 | Point2D gp = vv.inverseLayoutTransform(ip); |
| 193 | ||
| 194 | 0 | offsetx = (float) (gp.getX()-q.getX()); |
| 195 | 0 | offsety = (float) (gp.getY()-q.getY()); |
| 196 | 0 | } else if((edge = pickSupport.getEdge(ip.getX(), ip.getY())) != null) { |
| 197 | 0 | pickedState.clearPickedEdges(); |
| 198 | 0 | pickedState.pick(edge, true); |
| 199 | } else { | |
| 200 | 0 | pickedState.clearPickedEdges(); |
| 201 | 0 | pickedState.clearPickedVertices(); |
| 202 | } | |
| 203 | ||
| 204 | 0 | } else if(e.getModifiers() == addToSelectionModifiers) { |
| 205 | 0 | vv.addPostRenderPaintable(lensPaintable); |
| 206 | 0 | rect.setFrameFromDiagonal(down,down); |
| 207 | 0 | Point2D p = e.getPoint(); |
| 208 | // remove view transform | |
| 209 | 0 | Point2D ip = vv.inverseViewTransform(p); |
| 210 | 0 | vertex = pickSupport.getVertex(ip.getX(), ip.getY()); |
| 211 | 0 | if(vertex != null) { |
| 212 | 0 | boolean wasThere = pickedState.pick(vertex, !pickedState.isPicked(vertex)); |
| 213 | 0 | if(wasThere) { |
| 214 | 0 | vertex = null; |
| 215 | } else { | |
| 216 | ||
| 217 | // layout.getLocation applies the layout transformer so | |
| 218 | // q is transformed by the layout transformer only | |
| 219 | 0 | Point2D q = layout.getLocation(vertex); |
| 220 | // translate mouse point to graph coord system | |
| 221 | 0 | Point2D gp = vv.inverseLayoutTransform(ip); |
| 222 | ||
| 223 | 0 | offsetx = (float) (gp.getX()-q.getX()); |
| 224 | 0 | offsety = (float) (gp.getY()-q.getY()); |
| 225 | } | |
| 226 | 0 | } else if((edge = pickSupport.getEdge(ip.getX(), ip.getY())) != null) { |
| 227 | 0 | pickedState.pick(edge, !pickedState.isPicked(edge)); |
| 228 | } | |
| 229 | } | |
| 230 | } | |
| 231 | 0 | if(vertex != null) e.consume(); |
| 232 | 0 | } |
| 233 | ||
| 234 | /** | |
| 235 | * If the mouse is dragging a rectangle, pick the | |
| 236 | * Vertices contained in that rectangle | |
| 237 | * | |
| 238 | * clean up settings from mousePressed | |
| 239 | */ | |
| 240 | public void mouseReleased(MouseEvent e) { | |
| 241 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 242 | 0 | if(e.getModifiers() == modifiers) { |
| 243 | 0 | if(down != null) { |
| 244 | 0 | Point2D out = e.getPoint(); |
| 245 | 0 | if(vertex == null && heyThatsTooClose(down, out, 5) == false) { |
| 246 | 0 | pickContainedVertices(vv, true); |
| 247 | } | |
| 248 | } | |
| 249 | 0 | } else if(e.getModifiers() == this.addToSelectionModifiers) { |
| 250 | 0 | if(down != null) { |
| 251 | 0 | Point2D out = e.getPoint(); |
| 252 | 0 | if(vertex == null && heyThatsTooClose(down,out,5) == false) { |
| 253 | 0 | pickContainedVertices(vv, false); |
| 254 | } | |
| 255 | } | |
| 256 | } | |
| 257 | 0 | down = null; |
| 258 | 0 | vertex = null; |
| 259 | 0 | edge = null; |
| 260 | 0 | rect.setFrame(0,0,0,0); |
| 261 | 0 | vv.removePostRenderPaintable(lensPaintable); |
| 262 | 0 | } |
| 263 | ||
| 264 | /** | |
| 265 | * If the mouse is over a picked vertex, drag all picked | |
| 266 | * vertices with the mouse. | |
| 267 | * If the mouse is not over a Vertex, draw the rectangle | |
| 268 | * to select multiple Vertices | |
| 269 | * | |
| 270 | */ | |
| 271 | public void mouseDragged(MouseEvent e) { | |
| 272 | 0 | if(locked == false) { |
| 273 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 274 | 0 | if(vertex != null) { |
| 275 | 0 | Point p = e.getPoint(); |
| 276 | 0 | Point2D graphPoint = vv.inverseTransform(p); |
| 277 | 0 | Point2D graphDown = vv.inverseTransform(down); |
| 278 | 0 | Layout layout = vv.getGraphLayout(); |
| 279 | 0 | double dx = graphPoint.getX()-graphDown.getX(); |
| 280 | 0 | double dy = graphPoint.getY()-graphDown.getY(); |
| 281 | 0 | PickedState ps = vv.getPickedState(); |
| 282 | ||
| 283 | 0 | for(Iterator iterator=ps.getPickedVertices().iterator(); iterator.hasNext(); ) { |
| 284 | 0 | Vertex v = (Vertex)iterator.next(); |
| 285 | 0 | Point2D vp = layout.getLocation(v); |
| 286 | 0 | layout.forceMove(v, vp.getX()+dx, vp.getY()+dy); |
| 287 | } | |
| 288 | 0 | down = p; |
| 289 | ||
| 290 | } else { | |
| 291 | 0 | Point2D out = e.getPoint(); |
| 292 | 0 | if(e.getModifiers() == this.addToSelectionModifiers || |
| 293 | e.getModifiers() == modifiers) { | |
| 294 | 0 | rect.setFrameFromDiagonal(down,out); |
| 295 | } | |
| 296 | } | |
| 297 | 0 | if(vertex != null) e.consume(); |
| 298 | } | |
| 299 | 0 | } |
| 300 | ||
| 301 | /** | |
| 302 | * rejects picking if the rectangle is too small, like | |
| 303 | * if the user meant to select one vertex but moved the | |
| 304 | * mouse slightly | |
| 305 | * @param p | |
| 306 | * @param q | |
| 307 | * @param min | |
| 308 | * @return | |
| 309 | */ | |
| 310 | private boolean heyThatsTooClose(Point2D p, Point2D q, double min) { | |
| 311 | 0 | return Math.abs(p.getX()-q.getX()) < min && |
| 312 | Math.abs(p.getY()-q.getY()) < min; | |
| 313 | } | |
| 314 | ||
| 315 | /** | |
| 316 | * pick the vertices inside the rectangle | |
| 317 | * | |
| 318 | */ | |
| 319 | protected void pickContainedVertices(VisualizationViewer vv, boolean clear) { | |
| 320 | ||
| 321 | 0 | Layout layout = vv.getGraphLayout(); |
| 322 | 0 | PickedState pickedState = vv.getPickedState(); |
| 323 | 0 | if(pickedState != null) { |
| 324 | 0 | if(clear) { |
| 325 | 0 | pickedState.clearPickedVertices(); |
| 326 | } | |
| 327 | while(true) { | |
| 328 | try { | |
| 329 | 0 | for (Iterator iter=layout.getGraph().getVertices().iterator(); iter.hasNext(); ) { |
| 330 | 0 | Vertex v = (Vertex) iter.next(); |
| 331 | 0 | if(rect.contains(vv.transform(layout.getLocation(v)))) { |
| 332 | 0 | pickedState.pick(v, true); |
| 333 | } | |
| 334 | } | |
| 335 | 0 | break; |
| 336 | 0 | } catch(ConcurrentModificationException cme) {} |
| 337 | } | |
| 338 | } | |
| 339 | 0 | } |
| 340 | ||
| 341 | public void mouseClicked(MouseEvent e) { | |
| 342 | 0 | } |
| 343 | ||
| 344 | public void mouseEntered(MouseEvent e) { | |
| 345 | 0 | JComponent c = (JComponent)e.getSource(); |
| 346 | 0 | c.setCursor(cursor); |
| 347 | 0 | } |
| 348 | ||
| 349 | public void mouseExited(MouseEvent e) { | |
| 350 | 0 | JComponent c = (JComponent)e.getSource(); |
| 351 | 0 | c.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR)); |
| 352 | 0 | } |
| 353 | ||
| 354 | public void mouseMoved(MouseEvent e) { | |
| 355 | 0 | } |
| 356 | ||
| 357 | /** | |
| 358 | * @return Returns the locked. | |
| 359 | */ | |
| 360 | public boolean isLocked() { | |
| 361 | 0 | return locked; |
| 362 | } | |
| 363 | ||
| 364 | /** | |
| 365 | * @param locked The locked to set. | |
| 366 | */ | |
| 367 | public void setLocked(boolean locked) { | |
| 368 | 0 | this.locked = locked; |
| 369 | 0 | } |
| 370 | } |
|
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