def draw_event(self):
rnd = random.Random()
if not self.isDrawn:
item = QtWidgets.QGraphicsEllipseItem(*self.get_params())
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsEllipseItem(*self.get_params())
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsEllipseItem(*self.get_params())
item.setStartAngle(90)
item.setSpanAngle(random.randrange(10, 100))
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsEllipseItem(*self.get_params())
item.setStartAngle(90 * 20)
item.setSpanAngle(random.randrange(10, 100) * 20)
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsRectItem(*self.get_params())
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsRectItem(*self.get_params())
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsLineItem()
item.setLine(
random.randrange(
0,
self.graphicsView.frameGeometry().width() - MAX_WIDTH),
random.randrange(
0,
self.graphicsView.frameGeometry().height() - MAX_HEIGHT),
random.randrange(
0,
self.graphicsView.frameGeometry().width() - MAX_WIDTH),
random.randrange(
0,
self.graphicsView.frameGeometry().height() - MAX_HEIGHT))
self.graphicsScene.addItem(item)
item = QtWidgets.QGraphicsLineItem()
item.setLine(
random.randrange(
0,
self.graphicsView.frameGeometry().width() - MAX_WIDTH),
random.randrange(
0,
self.graphicsView.frameGeometry().height() - MAX_HEIGHT),
random.randrange(
0,
self.graphicsView.frameGeometry().width() - MAX_WIDTH),
random.randrange(
0,
self.graphicsView.frameGeometry().height() - MAX_HEIGHT))
self.graphicsScene.addItem(item)
self.isDrawn = True
def add_node(self):
x = random.randint(-200, 200)
y = random.randint(-150, 150)
node = QtWidgets.QGraphicsEllipseItem(x, y, 10, 10)
node.setPen(self.node_pen)
node.setBrush(self.node_brush)
node.setFlag(QtWidgets.QGraphicsItem.ItemIsSelectable)
node.setFlag(QtWidgets.QGraphicsItem.ItemIsMovable)
node.setCursor(Qt.PointingHandCursor)
self.scene.addItem(node)
self.maybe_save = True
self.status_bar.showMessage(f"Added node at ({x}, {y})")
def create_possible_move_dots(self, from_coord):
possible_coords = [
move[3:] for move in
[move for move in self.allowed_moves if move[:2] == from_coord]
]
self.possible_move_dots = []
for coord in possible_coords:
position = self.square_at_coord[coord].boundingRect().center(
) - QtCore.QPointF(self.dot_size / 2, self.dot_size / 2)
dot = QtWidgets.QGraphicsEllipseItem(position.x(), position.y(),
self.dot_size, self.dot_size)
dot.setBrush(QtGui.QBrush(QtCore.Qt.green))
dot.setZValue(self.possible_move_dot_Z_value)
self.possible_move_dots.append(dot)
self.scene().addItem(dot)
def __init__(self, view):
super(PainterTool, self).__init__(view)
self._prec_pos = None
self._prec_size = None
self.is_editing_size = False
self._size = None
self.size = 5
# preview item used when modifying size
self.size_display_item = QtWidgets.QGraphicsEllipseItem()
self.size_display_item.setPen(QtGui.QColor("red"))
self.size_display_item.setZValue(99999)
self.view.scene.addItem(self.size_display_item)
self.update_cursor()
def setupScene(self):
self.m_scene.setSceneRect(-300, -200, 600, 460)
linearGrad = QtGui.QLinearGradient(QtCore.QPointF(-100, -100),
QtCore.QPointF(100, 100))
linearGrad.setColorAt(0, QtGui.QColor(255, 255, 255))
linearGrad.setColorAt(1, QtGui.QColor(192, 192, 255))
self.setBackgroundBrush(linearGrad)
radialGrad = QtGui.QRadialGradient(30, 30, 30)
radialGrad.setColorAt(0, QtCore.Qt.yellow)
radialGrad.setColorAt(0.2, QtCore.Qt.yellow)
radialGrad.setColorAt(1, QtCore.Qt.transparent)
pixmap = QtGui.QPixmap(60, 60)
pixmap.fill(QtCore.Qt.transparent)
painter = QtGui.QPainter(pixmap)
painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(radialGrad)
painter.drawEllipse(0, 0, 60, 60)
painter.end()
self.m_lightSource = self.m_scene.addPixmap(pixmap)
self.m_lightSource.setZValue(2)
for i in range(-2, 3):
for j in range(-2, 3):
if (i + j) & 1:
item = QtWidgets.QGraphicsEllipseItem(0, 0, 50, 50)
else:
item = QtWidgets.QGraphicsRectItem(0, 0, 50, 50)
item.setPen(QtGui.QPen(QtCore.Qt.black, 1))
item.setBrush(QtGui.QBrush(QtCore.Qt.white))
effect = QtWidgets.QGraphicsDropShadowEffect(self)
effect.setBlurRadius(8)
item.setGraphicsEffect(effect)
item.setZValue(1)
item.setPos(i * 80, j * 80)
self.m_scene.addItem(item)
self.m_items.append(item)
painter.drawPath(myPath)
def timerHandler():
increment = 15
blade1.setAngle(blade1.angle+increment)
blade2.setAngle(blade2.angle+increment)
blade3.setAngle(blade3.angle+increment)
view.viewport().repaint()
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
scene = QtWidgets.QGraphicsScene(QtCore.QRectF(-100, -100, 200, 200))
scene.addItem(QtWidgets.QGraphicsRectItem(scene.sceneRect()))
centerItem = QtWidgets.QGraphicsEllipseItem(QtCore.QRectF(-10, -10, 20, 20))
centerItem.setPen(QtGui.QPen(QtCore.Qt.darkBlue))
centerItem.setBrush(QtCore.Qt.green)
centerItem.setZValue(2)
scene.addItem(centerItem)
circle1 = QtWidgets.QGraphicsEllipseItem(QtCore.QRectF(-75, -75, 150, 150))
circle1.setPen(QtGui.QPen(QtCore.Qt.black))
circle1.setBrush(QtCore.Qt.NoBrush)
# scene.addItem(circle1)
blade1 = FanBlade()
scene.addItem(blade1)
blade2 = FanBlade(120)
scene.addItem(blade2)
def main(): app = QtWidgets.QApplication(sys.argv) margin = 10 scene = QtWidgets.QGraphicsScene(QtCore.QRectF(-200-margin/2, -200-margin/2, 400+margin, 400+margin)) rect = QtWidgets.QGraphicsRectItem(scene.sceneRect().adjusted(1, 1, -1, -1)) rect.setPen(QtGui.QPen(QtCore.Qt.red, 1)) # scene.addItem(rect) radius = 200 diameter = radius * 2 ellipseItem = QtWidgets.QGraphicsEllipseItem(QtCore.QRectF(-200, -200, diameter, diameter)) ellipseItem.setPen(QtGui.QPen(QtCore.Qt.darkBlue)) # ellipseItem.setBrush(QtCore.Qt.blue) scene.addItem(ellipseItem) origin = QtCore.QPointF(0, 0) p1 = None p2 = None angle = 270 line1 = None line2 = None conePath = QtGui.QPainterPath() def drawLine(): nonlocal p1 nonlocal angle nonlocal line1 nonlocal line2 nonlocal origin if p1 == None: angle2 = angle + 20 p1 = QtCore.QPointF(radius * math.cos(angle * math.pi / 180.0), radius * math.sin(angle * math.pi / 180.0)) p2 = QtCore.QPointF(radius * math.cos(angle2 * math.pi / 180.0), radius * math.sin(angle2 * math.pi / 180.0)) line1 = QtWidgets.QGraphicsLineItem(p1.x(), p1.y(), 0, 0) line2 = QtWidgets.QGraphicsLineItem(0, 0, p2.x(), p2.y()) # conePath.moveTo(line1) # conePath.lineTo(line2) # conePath.closeSubpath() # scene.addPath(conePath) scene.addItem(line1) scene.addItem(line2) else: scene.removeItem(line1) scene.removeItem(line2) # scene.removeItem(conePath) angle += 1 angle2 = angle + 20 p1 = QtCore.QPointF(radius * math.cos(angle * math.pi / 180.0), radius * math.sin(angle * math.pi / 180.0)) p2 = QtCore.QPointF(radius * math.cos(angle2 * math.pi / 180.0), radius * math.sin(angle2 * math.pi / 180.0)) line1 = QtWidgets.QGraphicsLineItem(p1.x(), p1.y(), 0, 0) line2 = QtWidgets.QGraphicsLineItem(0, 0, p2.x(), p2.y()) # conePath.moveTo(line1) # conePath.lineTo(line2) # conePath.closeSubpath() # scene.addPath(conePath) scene.addItem(line1) scene.addItem(line2) view = QtWidgets.QGraphicsView() view.setRenderHint(QtGui.QPainter.Antialiasing) view.setScene(scene) view.show() # drawLine() timer = QtCore.QTimer() timer.setInterval(100) timer.timeout.connect(drawLine) timer.start() sys.exit(app.exec_())
