def rotatePolygon(self,polygon,degree=0,position=[0,0]): theta = math.radians(degree) cosang,sinang = math.cos(theta),math.sin(theta) n = len(polygon) cx = sum(p.x() for p in polygon)/n cy = sum(p.y() for p in polygon)/n rotatePolygon = QPolygon() for p in polygon: tx,ty = p.x()-cx,p.y()-cy rotatePolygon.append(QtCore.QPoint(tx*cosang+ty*sinang+cx+position[0],-tx*sinang+ty*cosang+cy+position[1])) return rotatePolygon
def paintEvent(self, event): QWidget.paintEvent(self, event) width, height = self.width(), self.height() polygon = QPolygon() for i, rate in enumerate(self.loads): x = width - i * self.pointDistance y = height - rate * height if x < self.boxWidth: break polygon.append(QPoint(x, y)) painter = QPainter(self) pen = QPen() pen.setColor(Qt.darkGreen) painter.setPen(pen) painter.setRenderHint(QPainter.Antialiasing, True) #画网格 painter.setOpacity(0.5) gridSize = self.pointDistance * 4 deltaX = (width - self.boxWidth) % gridSize + self.boxWidth deltaY = height % gridSize for i in range(int(width / gridSize)): x = deltaX + gridSize * i painter.drawLine(x, 0, x, height) for j in range(int(height / gridSize)): y = j * gridSize + deltaY painter.drawLine(self.boxWidth, y, width, y) #画折线 pen.setColor(Qt.darkCyan) pen.setWidth(2) painter.setPen(pen) painter.setOpacity(1) painter.drawPolyline(polygon) #画展示框 if len(self.loads) > 0: rate = self.loads[0] else: rate = 1.0 rect1 = QRect(4, height * 0.05, self.boxWidth - 9, height * 0.7) rect2 = QRect(4, height * 0.8, self.boxWidth - 9, height * 0.2) centerX = int(rect1.width() / 2) + 1 pen.setWidth(1) for i in range(rect1.height()): if i % 4 == 0: continue if (rect1.height() - i) / rect1.height() > rate: pen.setColor(Qt.darkGreen) else: pen.setColor(Qt.green) painter.setPen(pen) for j in range(rect1.width()): if centerX - 1 <= j <= centerX + 1: continue painter.drawPoint(rect1.x() + j, rect1.y() + i) pen.setColor(Qt.black) painter.setPen(pen) painter.drawText(rect2, Qt.AlignHCenter | Qt.AlignVCenter, str(int(rate * 100)) + "%")