Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java @ 3023:e19ff9086035
Avoid collisions between line labels.
flys-artifacts/trunk@4590 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
|---|---|
| date | Tue, 05 Jun 2012 15:03:11 +0000 |
| parents | fb07f936b5ad |
| children | 5642a83420f2 |
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| 3022:705d2058b682 | 3023:e19ff9086035 |
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| 17 | 17 |
| 18 /** | 18 /** |
| 19 * True if \param hotspot collides with a Entity in \param entities. | 19 * True if \param hotspot collides with a Entity in \param entities. |
| 20 * @param hotspot Shape to compare against other shapes (bounds only). | 20 * @param hotspot Shape to compare against other shapes (bounds only). |
| 21 * @param entities entities against which to compare shape. | 21 * @param entities entities against which to compare shape. |
| 22 * @param true if a collision (non-zero intersection) exists between | 22 * @param exclusiveEntityClass If not null, consider only entities of |
| 23 * given class. | |
| 24 * @return true if a collision (non-zero intersection) exists between | |
| 23 * shapes. | 25 * shapes. |
| 24 */ | 26 */ |
| 25 public static boolean collides(Shape hotspot, EntityCollection entities) { | 27 public static boolean collides(Shape hotspot, EntityCollection entities, |
| 28 Class exclusiveEntityClass) { | |
| 26 if (entities == null) return false; | 29 if (entities == null) return false; |
| 27 | 30 |
| 28 Rectangle2D hotspotBox = hotspot.getBounds2D(); | 31 Rectangle2D hotspotBox = hotspot.getBounds2D(); |
| 29 | 32 |
| 30 for (Iterator i = entities.iterator(); i.hasNext(); ) { | 33 for (Iterator i = entities.iterator(); i.hasNext(); ) { |
| 31 Object next = i.next(); | 34 Object next = i.next(); |
| 32 ChartEntity entity = (ChartEntity) next; | 35 ChartEntity entity = (ChartEntity) next; |
| 33 if (entity.getArea().intersects(hotspotBox)) { | 36 if (exclusiveEntityClass == null |
| 34 // Found collision, early stop. | 37 || exclusiveEntityClass.isInstance(entity)) |
| 35 return true; | 38 { |
| 39 if (entity.getArea().intersects(hotspotBox)) { | |
| 40 // Found collision, early stop. | |
| 41 return true; | |
| 42 } | |
| 36 } | 43 } |
| 37 } | 44 } |
| 38 | 45 |
| 39 return false; | 46 return false; |
| 40 } | 47 } |