Python PySide2.QtCore类代码示例

    def paint(self, painter, option=None, widget=None):
        if self.validateImage():
            wasSmoothPixmapTransform = painter.testRenderHint(QtGui.QPainter.SmoothPixmapTransform)
            painter.setRenderHint(QtGui.QPainter.SmoothPixmapTransform)

            if Colors.noRescale:
                # Let the painter scale the image for us.  This may degrade
                # both quality and performance.
                if self.sharedImage.image is not None:
                    painter.drawImage(self.pos(), self.sharedImage.image)
                else:
                    painter.drawPixmap(self.pos(), self.sharedImage.pixmap)
            else:
                m = painter.worldMatrix()
                painter.setWorldMatrix(QtGui.QMatrix())

                x = m.dx()
                y = m.dy()
                if self.noSubPixeling:
                    x = QtCore.qRound(x)
                    y = QtCore.qRound(y)

                if self.sharedImage.image is not None:
                    painter.drawImage(QtCore.QPointF(x, y),
                            self.sharedImage.image)
                else:
                    painter.drawPixmap(QtCore.QPointF(x, y),
                            self.sharedImage.pixmap)

            if not wasSmoothPixmapTransform:
                painter.setRenderHint(QtGui.QPainter.SmoothPixmapTransform,
                        False)

    def setRange(self, minValue, maxValue):
        if minValue < 0 or maxValue > 99 or minValue > maxValue:
            QtCore.qWarning("LCDRange::setRange(%d, %d)\n"
                    "\tRange must be 0..99\n"
                    "\tand minValue must not be greater than maxValue" % (minValue, maxValue))
            return

        self.slider.setRange(minValue, maxValue)

    def drawBackgroundToPixmap(self):
        r = self.scene.sceneRect()
        self.background = QtGui.QPixmap(QtCore.qRound(r.width()),
                QtCore.qRound(r.height()))
        self.background.fill(QtCore.Qt.black)
        painter = QtGui.QPainter(self.background)

        bg = QtGui.QImage(':/images/demobg.png')
        painter.drawImage(0, 0, bg)

    def __init__(self):
        super(ColorItem, self).__init__()

        self.color = QtGui.QColor(QtCore.qrand() % 256, QtCore.qrand() % 256,
                QtCore.qrand() % 256)

        self.setToolTip(
            "QColor(%d, %d, %d)\nClick and drag this color onto the robot!" %
              (self.color.red(), self.color.green(), self.color.blue())
        )
        self.setCursor(QtCore.Qt.OpenHandCursor)

    def mouseMoveEvent(self, event):
        if QtCore.QLineF(QtCore.QPointF(event.screenPos()), QtCore.QPointF(event.buttonDownScreenPos(QtCore.Qt.LeftButton))).length() < QtWidgets.QApplication.startDragDistance():
            return

        drag = QtGui.QDrag(event.widget())
        mime = QtCore.QMimeData()
        drag.setMimeData(mime)

        ColorItem.n += 1
        if ColorItem.n > 2 and QtCore.qrand() % 3 == 0:
            image = QtGui.QImage(':/images/head.png')
            mime.setImageData(image)
            drag.setPixmap(QtGui.QPixmap.fromImage(image).scaled(30,40))
            drag.setHotSpot(QtCore.QPoint(15, 30))
        else:
            mime.setColorData(self.color)
            mime.setText("#%02x%02x%02x" % (self.color.red(), self.color.green(), self.color.blue()))

            pixmap = QtGui.QPixmap(34, 34)
            pixmap.fill(QtCore.Qt.white)

            painter = QtGui.QPainter(pixmap)
            painter.translate(15, 15)
            painter.setRenderHint(QtGui.QPainter.Antialiasing)
            self.paint(painter, None, None)
            painter.end()

            pixmap.setMask(pixmap.createHeuristicMask())

            drag.setPixmap(pixmap)
            drag.setHotSpot(QtCore.QPoint(15, 20))

        drag.exec_()
        self.setCursor(QtCore.Qt.OpenHandCursor)

def _pyside():
    from PySide import (
        QtGui,
        QtCore,
        QtNetwork,
        QtXml,
        QtHelp,
        QtUiTools,
        __version__
    )

    QtWidgets = QtGui

    Qt.__binding__ = "PySide"
    Qt.__qt_version__ = QtCore.qVersion()
    Qt.__binding_version__ = __version__
    QtCompat.load_ui = lambda fname: QtUiTools.QUiLoader().load(fname)
    QtCompat.setSectionResizeMode = QtGui.QHeaderView.setResizeMode
    QtCompat.translate = (
        lambda context, sourceText, disambiguation, n:
        QtCore.QCoreApplication.translate(context,
                                          sourceText,
                                          disambiguation,
                                          QtCore.QCoreApplication.CodecForTr,
                                          n))
    return QtCore, QtGui, QtWidgets, QtNetwork, QtXml, QtHelp

    def shotRect(self):
        gravity = 4.0

        time = self.timerCount / 40.0
        velocity = self.shootForce
        radians = self.shootAngle * 3.14159265 / 180

        velx = velocity * math.cos(radians)
        vely = velocity * math.sin(radians)
        x0 = (CannonField.barrelRect.right() + 5) * math.cos(radians)
        y0 = (CannonField.barrelRect.right() + 5) * math.sin(radians)
        x = x0 + velx * time
        y = y0 + vely * time - 0.5 * gravity * time * time

        result = QtCore.QRect(0, 0, 6, 6)
        result.moveCenter(QtCore.QPoint(QtCore.qRound(x), self.height() - 1 - QtCore.qRound(y)))
        return result

    def __init__(self):
        super(Mouse, self).__init__()

        self.angle = 0.0
        self.speed = 0.0
        self.mouseEyeDirection = 0.0
        self.color = QtGui.QColor(QtCore.qrand() % 256, QtCore.qrand() % 256,
                QtCore.qrand() % 256)

        self.rotate(QtCore.qrand() % (360 * 16))

        # In the C++ version of this example, this class is also derived from
        # QObject in order to receive timer events.  PyQt does not support
        # deriving from more than one wrapped class so we just create an
        # explicit timer instead.
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.timerEvent)
        self.timer.start(1000 / 33)

 def mouseMoveEvent(self, event):
     if not self.barrelPressed:
         return
     pos = event.pos()
     if pos.x() <= 0:
         pos.setX(1)
     if pos.y() >= self.height():
         pos.setY(self.height() - 1)
     rad = math.atan((float(self.rect().bottom()) - pos.y()) / pos.x())
     self.setAngle(QtCore.qRound(rad * 180 / 3.14159265))

    def keyPressEvent(self, event):
        key = event.key()

        if key == QtCore.Qt.Key_Up:
            self.centerNode.moveBy(0, -20)
        elif key == QtCore.Qt.Key_Down:
            self.centerNode.moveBy(0, 20)
        elif key == QtCore.Qt.Key_Left:
            self.centerNode.moveBy(-20, 0)
        elif key == QtCore.Qt.Key_Right:
            self.centerNode.moveBy(20, 0)
        elif key == QtCore.Qt.Key_Plus:
            self.scaleView(1.2)
        elif key == QtCore.Qt.Key_Minus:
            self.scaleView(1 / 1.2)
        elif key == QtCore.Qt.Key_Space or key == QtCore.Qt.Key_Enter:
            for item in self.scene().items():
                if isinstance(item, Node):
                    item.setPos(-150 + QtCore.qrand() % 300, -150 + QtCore.qrand() % 300)
        else:
            QtGui.QGraphicsView.keyPressEvent(self, event)

    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:
                xvel += (dx * 150.0) / l
                yvel += (dy * 150.0) / l

        # 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) < 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))

    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)))

def _pyside2():
    from PySide2 import (
        QtWidgets,
        QtGui,
        QtCore,
        QtNetwork,
        QtXml,
        QtHelp,
        QtUiTools,
        __version__
    )

    Qt.__binding__ = "PySide2"
    Qt.__qt_version__ = QtCore.qVersion()
    Qt.__binding_version__ = __version__
    QtCompat.load_ui = lambda fname: QtUiTools.QUiLoader().load(fname)
    QtCompat.setSectionResizeMode = QtWidgets.QHeaderView.setSectionResizeMode
    QtCompat.translate = QtCore.QCoreApplication.translate

    return QtCore, QtGui, QtWidgets, QtNetwork, QtXml, QtHelp

    # Values.
    for i, item in enumerate(items):
        # Ellipse.
        ellipseState.assignProperty(item, 'pos',
                QtCore.QPointF(math.cos((i / 63.0) * 6.28) * 250,
                        math.sin((i / 63.0) * 6.28) * 250))

        # Figure 8.
        figure8State.assignProperty(item, 'pos',
                QtCore.QPointF(math.sin((i / 63.0) * 6.28) * 250,
                        math.sin(((i * 2)/63.0) * 6.28) * 250))

        # Random.
        randomState.assignProperty(item, 'pos',
                QtCore.QPointF(-250 + QtCore.qrand() % 500,
                        -250 + QtCore.qrand() % 500))

        # Tiled.
        tiledState.assignProperty(item, 'pos',
                QtCore.QPointF(((i % 8) - 4) * kineticPix.width() + kineticPix.width() / 2,
                        ((i // 8) - 4) * kineticPix.height() + kineticPix.height() / 2))

        # Centered.
        centeredState.assignProperty(item, 'pos', QtCore.QPointF())

    # Ui.
    view = View(scene)
    view.setWindowTitle("Animated Tiles")
    view.setViewportUpdateMode(QtGui.QGraphicsView.BoundingRectViewportUpdate)
    view.setBackgroundBrush(QtGui.QBrush(bgPix))

        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)))


if __name__ == '__main__':

    import sys

    MouseCount = 7

    app = QtGui.QApplication(sys.argv)
    QtCore.qsrand(QtCore.QTime(0,0,0).secsTo(QtCore.QTime.currentTime()))

    scene = QtGui.QGraphicsScene()
    scene.setSceneRect(-300, -300, 600, 600)
    scene.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)

    for i in range(MouseCount):
        mouse = Mouse()
        mouse.setPos(math.sin((i * 6.28) / MouseCount) * 200,
                     math.cos((i * 6.28) / MouseCount) * 200)
        scene.addItem(mouse)

    view = QtGui.QGraphicsView(scene)
    view.setRenderHint(QtGui.QPainter.Antialiasing)
    view.setBackgroundBrush(QtGui.QBrush(QtGui.QPixmap(':/images/cheese.jpg')))
    view.setCacheMode(QtGui.QGraphicsView.CacheBackground)