本文整理汇总了Python中pyqtcore.QVector.first方法的典型用法代码示例。如果您正苦于以下问题:Python QVector.first方法的具体用法?Python QVector.first怎么用?Python QVector.first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pyqtcore.QVector
的用法示例。
在下文中一共展示了QVector.first方法的2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: Zoomable
# 需要导入模块: from pyqtcore import QVector [as 别名]
# 或者: from pyqtcore.QVector import first [as 别名]
class Zoomable(QObject):
scaleChanged = pyqtSignal(float)
def __init__(self, parent = None):
super().__init__(parent)
self.mScale = 1
self.mZoomFactors = QVector()
self.mGestureStartScale = 0
self.mComboBox = None
self.mComboRegExp = QRegExp("^\\s*(\\d+)\\s*%?\\s*$")
self.mComboValidator = None
for i in range(zoomFactorCount):
self.mZoomFactors.append(zoomFactors[i])
def setScale(self, scale):
if (scale == self.mScale):
return
self.mScale = scale
self.syncComboBox()
self.scaleChanged.emit(self.mScale)
def scale(self):
return self.mScale
def canZoomIn(self):
return self.mScale < self.mZoomFactors.last()
def canZoomOut(self):
return self.mScale > self.mZoomFactors.first()
##
# Changes the current scale based on the given mouse wheel \a delta.
#
# For convenience, the delta is assumed to be in the same units as
# QWheelEvent.delta, which is the distance that the wheel is rotated,
# in eighths of a degree.
##
def handleWheelDelta(self, delta):
if (delta <= -120):
self.zoomOut()
elif (delta >= 120):
self.zoomIn()
else:
# We're dealing with a finer-resolution mouse. Allow it to have finer
# control over the zoom level.
factor = 1 + 0.3 * qAbs(delta / 8 / 15)
if (delta < 0):
factor = 1 / factor
scale = qBound(self.mZoomFactors.first(),
self.mScale * factor,
self.mZoomFactors.back())
# Round to at most four digits after the decimal point
self.setScale(math.floor(scale * 10000 + 0.5) / 10000)
##
# Changes the current scale based on the given pinch gesture.
##
def handlePinchGesture(self, pinch):
if (not (pinch.changeFlags() & QPinchGesture.ScaleFactorChanged)):
return
x = pinch.state()
if x==Qt.NoGesture:
pass
elif x==Qt.GestureStarted:
self.mGestureStartScale = self.mScale
# fall through
elif x==Qt.GestureUpdated:
factor = pinch.scaleFactor()
scale = qBound(self.mZoomFactors.first(),
self.mGestureStartScale * factor,
self.mZoomFactors.back())
self.setScale(math.floor(scale * 10000 + 0.5) / 10000)
elif x==Qt.GestureFinished:
pass
elif x==Qt.GestureCanceled:
pass
##
# Returns whether images should be smoothly transformed when drawn at the
# current scale. This is the case when the scale is not 1 and smaller than
# 2.
##
def smoothTransform(self):
return self.mScale != 1.0 and self.mScale < 2.0
def setZoomFactors(self, factors):
self.mZoomFactors = factors
def connectToComboBox(self, comboBox):
if (self.mComboBox):
self.mComboBox.disconnect()
if (self.mComboBox.lineEdit()):
self.mComboBox.lineEdit().disconnect()
self.mComboBox.setValidator(None)
self.mComboBox = comboBox
if type(comboBox) is QComboBox:
self.mComboBox.clear()
for scale in self.mZoomFactors:
#.........这里部分代码省略.........
示例2: ObjectSelectionTool
# 需要导入模块: from pyqtcore import QVector [as 别名]
# 或者: from pyqtcore.QVector import first [as 别名]
#.........这里部分代码省略.........
self.mapScene().setSelectedObjectItems(QSet())
elif x==Action.Selecting:
self.updateSelection(event.scenePos(), event.modifiers())
self.mapScene().removeItem(self.mSelectionRectangle)
self.mAction = Action.NoAction
elif x==Action.Moving:
self.finishMoving(event.scenePos())
elif x==Action.Rotating:
self.finishRotating(event.scenePos())
elif x==Action.Resizing:
self.finishResizing(event.scenePos())
self.mMousePressed = False
self.mClickedObjectItem = None
self.mClickedRotateHandle = None
self.mClickedResizeHandle = None
self.refreshCursor()
def modifiersChanged(self, modifiers):
self.mModifiers = modifiers
self.refreshCursor()
def languageChanged(self):
self.setName(self.tr("Select Objects"))
self.setShortcut(QKeySequence(self.tr("S")))
def updateHandles(self):
if (self.mAction == Action.Moving or self.mAction == Action.Rotating or self.mAction == Action.Resizing):
return
objects = self.mapDocument().selectedObjects()
showHandles = objects.size() > 0
if (showHandles):
renderer = self.mapDocument().renderer()
boundingRect = objectBounds(objects.first(), renderer, objectTransform(objects.first(), renderer))
for i in range(1, objects.size()):
object = objects.at(i)
boundingRect |= objectBounds(object, renderer, objectTransform(object, renderer))
topLeft = boundingRect.topLeft()
topRight = boundingRect.topRight()
bottomLeft = boundingRect.bottomLeft()
bottomRight = boundingRect.bottomRight()
center = boundingRect.center()
handleRotation = 0
# If there is only one object selected, align to its orientation.
if (objects.size() == 1):
object = objects.first()
handleRotation = object.rotation()
if (resizeInPixelSpace(object)):
bounds = pixelBounds(object)
transform = QTransform(objectTransform(object, renderer))
topLeft = transform.map(renderer.pixelToScreenCoords_(bounds.topLeft()))
topRight = transform.map(renderer.pixelToScreenCoords_(bounds.topRight()))
bottomLeft = transform.map(renderer.pixelToScreenCoords_(bounds.bottomLeft()))
bottomRight = transform.map(renderer.pixelToScreenCoords_(bounds.bottomRight()))
center = transform.map(renderer.pixelToScreenCoords_(bounds.center()))
# Ugly hack to make handles appear nicer in this case
if (self.mapDocument().map().orientation() == Map.Orientation.Isometric):
handleRotation += 45
else:
bounds = objectBounds(object, renderer, QTransform())
transform = QTransform(objectTransform(object, renderer))
topLeft = transform.map(bounds.topLeft())
topRight = transform.map(bounds.topRight())
bottomLeft = transform.map(bounds.bottomLeft())
bottomRight = transform.map(bounds.bottomRight())