Mercurial Repositories > eric / file comparison
comparison: E5Graphics/E5ArrowItem.py
E5Graphics/E5ArrowItem.py
- changeset 1112
- 8a7d1b9d18db
- parent 945
- 8cd4d08fa9f6
- child 1131
- 7781e396c903
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| 1109:9552b5e16a07 | 1112:8a7d1b9d18db |
|---|---|
| 5 | 5 |
| 6 """ | 6 """ |
| 7 Module implementing a graphics item subclass for an arrow. | 7 Module implementing a graphics item subclass for an arrow. |
| 8 """ | 8 """ |
| 9 | 9 |
| 10 from math import * | 10 import math |
| 11 | 11 |
| 12 from PyQt4.QtCore import * | 12 from PyQt4.QtCore import QPointF, QRectF, QSizeF, QLineF, Qt |
| 13 from PyQt4.QtGui import * | 13 from PyQt4.QtGui import QAbstractGraphicsShapeItem, QGraphicsItem, QStyle, QPen, QPolygonF |
| 14 | 14 |
| 15 NormalArrow = 1 | 15 NormalArrow = 1 |
| 16 WideArrow = 2 | 16 WideArrow = 2 |
| 17 | 17 |
| 18 ArrowheadAngleFactor = 0.26179938779914941 # 0.5 * atan(sqrt(3.0) / 3.0) | 18 ArrowheadAngleFactor = 0.26179938779914941 # 0.5 * math.atan(math.sqrt(3.0) / 3.0) |
| 19 | 19 |
| 20 | 20 |
| 21 class E5ArrowItem(QAbstractGraphicsShapeItem): | 21 class E5ArrowItem(QAbstractGraphicsShapeItem): |
| 22 """ | 22 """ |
| 23 Class implementing an arrow graphics item subclass. | 23 Class implementing an arrow graphics item subclass. |
| 111 painter.setPen(QPen(Qt.black, width, Qt.SolidLine, Qt.FlatCap, Qt.MiterJoin)) | 111 painter.setPen(QPen(Qt.black, width, Qt.SolidLine, Qt.FlatCap, Qt.MiterJoin)) |
| 112 painter.drawLine(line) | 112 painter.drawLine(line) |
| 113 | 113 |
| 114 # draw the arrow head | 114 # draw the arrow head |
| 115 arrowAngle = self._type * ArrowheadAngleFactor | 115 arrowAngle = self._type * ArrowheadAngleFactor |
| 116 slope = atan2(line.dy(), line.dx()) | 116 slope = math.atan2(line.dy(), line.dx()) |
| 117 | 117 |
| 118 # Calculate left arrow point | 118 # Calculate left arrow point |
| 119 arrowSlope = slope + arrowAngle | 119 arrowSlope = slope + arrowAngle |
| 120 a1 = QPointF(self._end.x() - self._halfLength * cos(arrowSlope), | 120 a1 = QPointF(self._end.x() - self._halfLength * math.cos(arrowSlope), |
| 121 self._end.y() - self._halfLength * sin(arrowSlope)) | 121 self._end.y() - self._halfLength * math.sin(arrowSlope)) |
| 122 | 122 |
| 123 # Calculate right arrow point | 123 # Calculate right arrow point |
| 124 arrowSlope = slope - arrowAngle | 124 arrowSlope = slope - arrowAngle |
| 125 a2 = QPointF(self._end.x() - self._halfLength * cos(arrowSlope), | 125 a2 = QPointF(self._end.x() - self._halfLength * math.cos(arrowSlope), |
| 126 self._end.y() - self._halfLength * sin(arrowSlope)) | 126 self._end.y() - self._halfLength * math.sin(arrowSlope)) |
| 127 | 127 |
| 128 if self._filled: | 128 if self._filled: |
| 129 painter.setBrush(Qt.black) | 129 painter.setBrush(Qt.black) |
| 130 else: | 130 else: |
| 131 painter.setBrush(Qt.white) | 131 painter.setBrush(Qt.white) |
