本文整理汇总了Python中PyQt4.QtCore.qAbs方法的典型用法代码示例。如果您正苦于以下问题：Python QtCore.qAbs方法的具体用法？Python QtCore.qAbs怎么用？Python QtCore.qAbs使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PyQt4.QtCore的用法示例。
在下文中一共展示了QtCore.qAbs方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: timerEvent
# 需要导入模块: from PyQt4 import QtCore [as 别名]
# 或者: from PyQt4.QtCore import qAbs [as 别名]
def timerEvent(self):
# Don't move too far away.
lineToCenter = QtCore.QLineF(QtCore.QPointF(0, 0), self.mapFromScene(0, 0))
if lineToCenter.length() > 150:
angleToCenter = math.acos(lineToCenter.dx() / lineToCenter.length())
if lineToCenter.dy() < 0:
angleToCenter = Mouse.TwoPi - angleToCenter;
angleToCenter = Mouse.normalizeAngle((Mouse.Pi - angleToCenter) + Mouse.Pi / 2)
if angleToCenter < Mouse.Pi and angleToCenter > Mouse.Pi / 4:
# Rotate left.
self.angle += [-0.25, 0.25][self.angle < -Mouse.Pi / 2]
elif angleToCenter >= Mouse.Pi and angleToCenter < (Mouse.Pi + Mouse.Pi / 2 + Mouse.Pi / 4):
# Rotate right.
self.angle += [-0.25, 0.25][self.angle < Mouse.Pi / 2]
elif math.sin(self.angle) < 0:
self.angle += 0.25
elif math.sin(self.angle) > 0:
self.angle -= 0.25
# Try not to crash with any other mice.
dangerMice = self.scene().items(QtGui.QPolygonF([self.mapToScene(0, 0),
self.mapToScene(-30, -50),
self.mapToScene(30, -50)]))
for item in dangerMice:
if item is self:
continue
lineToMouse = QtCore.QLineF(QtCore.QPointF(0, 0), self.mapFromItem(item, 0, 0))
angleToMouse = math.acos(lineToMouse.dx() / lineToMouse.length())
if lineToMouse.dy() < 0:
angleToMouse = Mouse.TwoPi - angleToMouse
angleToMouse = Mouse.normalizeAngle((Mouse.Pi - angleToMouse) + Mouse.Pi / 2)
if angleToMouse >= 0 and angleToMouse < Mouse.Pi / 2:
# Rotate right.
self.angle += 0.5
elif angleToMouse <= Mouse.TwoPi and angleToMouse > (Mouse.TwoPi - Mouse.Pi / 2):
# Rotate left.
self.angle -= 0.5
# Add some random movement.
if len(dangerMice) > 1 and (QtCore.qrand() % 10) == 0:
if QtCore.qrand() % 1:
self.angle += (QtCore.qrand() % 100) / 500.0
else:
self.angle -= (QtCore.qrand() % 100) / 500.0
self.speed += (-50 + QtCore.qrand() % 100) / 100.0
dx = math.sin(self.angle) * 10
self.mouseEyeDirection = [dx / 5, 0.0][QtCore.qAbs(dx / 5) < 1]
self.rotate(dx)
self.setPos(self.mapToParent(0, -(3 + math.sin(self.speed) * 3)))示例2: calculateForces
# 需要导入模块: from PyQt4 import QtCore [as 别名]
# 或者: from PyQt4.QtCore import qAbs [as 别名]
def calculateForces(self):
"""
Calculate the forces to determine movement of the arrange action.
"""
if not self.scene() or self.scene().mouseGrabberItem() is self:
self.newPos = self.pos()
return
# Sum up all forces pushing this item away.
xvel = 0.0
yvel = 0.0
for item in self.scene().items():
if not isinstance(item, Node):
continue
line = QtCore.QLineF(self.mapFromItem(item, 0, 0), QtCore.QPointF(0, 0))
dx = line.dx()
dy = line.dy()
l = 2.0 * (dx * dx + dy * dy)
if l > 0:
xvel += (dx * 150.0) / l
yvel += (dy * 150.0) / l
# Now subtract all forces pulling items together.
weight = (len(self.edgeList) + 1) * 50.0
for edge in self.edgeList:
if edge.sourceNode() is self:
pos = self.mapFromItem(edge.destNode(), 0, 0)
else:
pos = self.mapFromItem(edge.sourceNode(), 0, 0)
xvel += pos.x() / weight
yvel += pos.y() / weight
if QtCore.qAbs(xvel) < 0.1 and QtCore.qAbs(yvel) < 0.1:
xvel = yvel = 0.0
sceneRect = self.scene().sceneRect()
self.newPos = self.pos() + QtCore.QPointF(xvel, yvel)
self.newPos.setX(min(max(self.newPos.x(), sceneRect.left() + 10), sceneRect.right() - 10))
self.newPos.setY(min(max(self.newPos.y(), sceneRect.top() + 10), sceneRect.bottom() - 10))示例3: calculateForces
# 需要导入模块: from PyQt4 import QtCore [as 别名]
# 或者: from PyQt4.QtCore import qAbs [as 别名]
def calculateForces(self):
if not self.scene() or self.scene().mouseGrabberItem() is self:
self.newPos = self.pos()
return
# Sum up all forces pushing this item away.
xvel = 0.0
yvel = 0.0
for item in self.scene().items():
if not isinstance(item, Node):
continue
line = QtCore.QLineF(self.mapFromItem(item, 0, 0),
QtCore.QPointF(0, 0))
dx = line.dx()
dy = line.dy()
l = 2.0 * (dx * dx + dy * dy)
if l > 0 and l < self.okLength:
xvel += (dx * self.targetDx) / l
yvel += (dy * self.targetDy) / l
# and pushing from wall
dd = self.scene().width()/2 - QtCore.qAbs(self.x()) + 10
if QtCore.qAbs(dd) > 0 and QtCore.qAbs(dd) < self.targetDx:
xvel += -self.x() / dd
dd = self.scene().height()/2 - QtCore.qAbs(self.y()) + 10
if QtCore.qAbs(dd) > 0 and QtCore.qAbs(dd) < self.targetDy:
yvel += -self.y() / dd
# Now subtract all forces pulling items together.
weight = (len(self.edgeList) + 1) * 10.0
for edge in self.edgeList:
if edge.sourceNode() is self:
pos = self.mapFromItem(edge.destNode(), 0, 0)
else:
pos = self.mapFromItem(edge.sourceNode(), 0, 0)
xvel += pos.x() / weight
yvel += pos.y() / weight
if QtCore.qAbs(xvel) < self.epsilon and QtCore.qAbs(yvel) < self.epsilon:
xvel = yvel = 0.0
sceneRect = self.scene().sceneRect()
self.newPos = self.pos() + QtCore.QPointF(xvel, yvel)
self.newPos.setX(min(max(self.newPos.x(), sceneRect.left() + 10), sceneRect.right() - 10))
self.newPos.setY(min(max(self.newPos.y(), sceneRect.top() + 10), sceneRect.bottom() - 10))