Mercurial Repositories > eric / file comparison
comparison: Graphics/AssociationItem.py
Graphics/AssociationItem.py
- branch
- Py2 comp.
- changeset 3057
- 10516539f238
- parent 2525
- 8b507a9a2d40
- parent 2992
- dbdf27746da5
- child 3058
- 0a02c433f52d
equal
deleted
inserted
replaced
| 3056:9986ec0e559a | 3057:10516539f238 |
|---|---|
| 73 | 73 |
| 74 self.setFlag(QGraphicsItem.ItemIsMovable, False) | 74 self.setFlag(QGraphicsItem.ItemIsMovable, False) |
| 75 self.setFlag(QGraphicsItem.ItemIsSelectable, False) | 75 self.setFlag(QGraphicsItem.ItemIsSelectable, False) |
| 76 | 76 |
| 77 if topToBottom: | 77 if topToBottom: |
| 78 self.calculateEndingPoints = self.__calculateEndingPoints_topToBottom | 78 self.calculateEndingPoints = \ |
| 79 self.__calculateEndingPoints_topToBottom | |
| 79 else: | 80 else: |
| 80 ## self.calculateEndingPoints = self.__calculateEndingPoints_center | 81 ## self.calculateEndingPoints = self.__calculateEndingPoints_center |
| 81 self.calculateEndingPoints = self.__calculateEndingPoints_rectangle | 82 self.calculateEndingPoints = self.__calculateEndingPoints_rectangle |
| 82 | 83 |
| 83 self.itemA = itemA | 84 self.itemA = itemA |
| 93 self.itemA.addAssociation(self) | 94 self.itemA.addAssociation(self) |
| 94 self.itemB.addAssociation(self) | 95 self.itemB.addAssociation(self) |
| 95 | 96 |
| 96 def __mapRectFromItem(self, item): | 97 def __mapRectFromItem(self, item): |
| 97 """ | 98 """ |
| 98 Private method to map item's rectangle to this item's coordinate system. | 99 Private method to map item's rectangle to this item's coordinate |
| 100 system. | |
| 99 | 101 |
| 100 @param item reference to the item to be mapped (QGraphicsRectItem) | 102 @param item reference to the item to be mapped (QGraphicsRectItem) |
| 101 @return item's rectangle in local coordinates (QRectF) | 103 @return item's rectangle in local coordinates (QRectF) |
| 102 """ | 104 """ |
| 103 rect = item.rect() | 105 rect = item.rect() |
| 156 if startP.x() != -1 and startP.y() != -1 and \ | 158 if startP.x() != -1 and startP.y() != -1 and \ |
| 157 endP.x() != -1 and endP.y() != -1: | 159 endP.x() != -1 and endP.y() != -1: |
| 158 self.setPoints(startP.x(), startP.y(), endP.x(), endP.y()) | 160 self.setPoints(startP.x(), startP.y(), endP.x(), endP.y()) |
| 159 | 161 |
| 160 def __calculateEndingPoints_rectangle(self): | 162 def __calculateEndingPoints_rectangle(self): |
| 161 """ | 163 r""" |
| 162 Private method to calculate the ending points of the association item. | 164 Private method to calculate the ending points of the association item. |
| 163 | 165 |
| 164 The ending points are calculated by the following method. | 166 The ending points are calculated by the following method. |
| 165 | 167 |
| 166 For each item the diagram is divided in four Regions by its diagonals | 168 For each item the diagram is divided in four Regions by its diagonals |
| 185 To calculate the start point we have to find out in which | 187 To calculate the start point we have to find out in which |
| 186 region (defined by itemA's diagonals) is itemB's TopLeft corner | 188 region (defined by itemA's diagonals) is itemB's TopLeft corner |
| 187 (lets call it region M). After that the start point will be | 189 (lets call it region M). After that the start point will be |
| 188 the middle point of rectangle's side contained in region M. | 190 the middle point of rectangle's side contained in region M. |
| 189 | 191 |
| 190 To calculate the end point we repeat the above but in the opposite direction | 192 To calculate the end point we repeat the above but in the opposite |
| 191 (from itemB to itemA) | 193 direction (from itemB to itemA) |
| 192 """ | 194 """ |
| 193 if self.itemA is None or self.itemB is None: | 195 if self.itemA is None or self.itemB is None: |
| 194 return | 196 return |
| 195 | 197 |
| 196 self.prepareGeometryChange() | 198 self.prepareGeometryChange() |
| 237 | 239 |
| 238 self.__updateEndPoint(self.regionB, False) | 240 self.__updateEndPoint(self.regionB, False) |
| 239 | 241 |
| 240 def __findPointRegion(self, rect, posX, posY): | 242 def __findPointRegion(self, rect, posX, posY): |
| 241 """ | 243 """ |
| 242 Private method to find out, which region of rectangle rect contains the point | 244 Private method to find out, which region of rectangle rect contains |
| 243 (PosX, PosY) and returns the region number. | 245 the point (PosX, PosY) and returns the region number. |
| 244 | 246 |
| 245 @param rect rectangle to calculate the region for (QRectF) | 247 @param rect rectangle to calculate the region for (QRectF) |
| 246 @param posX x position of point (float) | 248 @param posX x position of point (float) |
| 247 @param posY y position of point (float) | 249 @param posY y position of point (float) |
| 248 @return the calculated region number<br /> | 250 @return the calculated region number<br /> |
| 350 else: | 352 else: |
| 351 self.setEndPoint(px, py) | 353 self.setEndPoint(px, py) |
| 352 | 354 |
| 353 def __findRectIntersectionPoint(self, item, p1, p2): | 355 def __findRectIntersectionPoint(self, item, p1, p2): |
| 354 """ | 356 """ |
| 355 Private method to find the intersetion point of a line with a rectangle. | 357 Private method to find the intersetion point of a line with a |
| 358 rectangle. | |
| 356 | 359 |
| 357 @param item item to check against | 360 @param item item to check against |
| 358 @param p1 first point of the line (QPointF) | 361 @param p1 first point of the line (QPointF) |
| 359 @param p2 second point of the line (QPointF) | 362 @param p2 second point of the line (QPointF) |
| 360 @return the intersection point (QPointF) | 363 @return the intersection point (QPointF) |
| 479 | 482 |
| 480 pt.setY((b2 - b1) / (slope1 - slope2)) | 483 pt.setY((b2 - b1) / (slope1 - slope2)) |
| 481 pt.setX(slope1 * pt.y() + b1) | 484 pt.setX(slope1 * pt.y() + b1) |
| 482 # the intersection point must be inside the segment (x1, y1) (x2, y2) | 485 # the intersection point must be inside the segment (x1, y1) (x2, y2) |
| 483 if x2 >= x1 and y2 >= y1: | 486 if x2 >= x1 and y2 >= y1: |
| 484 if not ((x1 <= pt.y() and pt.y() <= x2) and (y1 <= pt.x() and pt.x() <= y2)): | 487 if not ((x1 <= pt.y() and pt.y() <= x2) and |
| 488 (y1 <= pt.x() and pt.x() <= y2)): | |
| 485 pt.setX(-1.0) | 489 pt.setX(-1.0) |
| 486 pt.setY(-1.0) | 490 pt.setY(-1.0) |
| 487 elif x2 < x1 and y2 >= y1: | 491 elif x2 < x1 and y2 >= y1: |
| 488 if not ((x2 <= pt.y() and pt.y() <= x1) and (y1 <= pt.x() and pt.x() <= y2)): | 492 if not ((x2 <= pt.y() and pt.y() <= x1) and |
| 493 (y1 <= pt.x() and pt.x() <= y2)): | |
| 489 pt.setX(-1.0) | 494 pt.setX(-1.0) |
| 490 pt.setY(-1.0) | 495 pt.setY(-1.0) |
| 491 elif x2 >= x1 and y2 < y1: | 496 elif x2 >= x1 and y2 < y1: |
| 492 if not ((x1 <= pt.y() and pt.y() <= x2) and (y2 <= pt.x() and pt.x() <= y1)): | 497 if not ((x1 <= pt.y() and pt.y() <= x2) and |
| 498 (y2 <= pt.x() and pt.x() <= y1)): | |
| 493 pt.setX(-1.0) | 499 pt.setX(-1.0) |
| 494 pt.setY(-1.0) | 500 pt.setY(-1.0) |
| 495 else: | 501 else: |
| 496 if not ((x2 <= pt.y() and pt.y() <= x1) and (y2 <= pt.x() and pt.x() <= y1)): | 502 if not ((x2 <= pt.y() and pt.y() <= x1) and |
| 503 (y2 <= pt.x() and pt.x() <= y1)): | |
| 497 pt.setX(-1.0) | 504 pt.setX(-1.0) |
| 498 pt.setY(-1.0) | 505 pt.setY(-1.0) |
| 499 | 506 |
| 500 return pt | 507 return pt |
| 501 | 508 |
