我没有找到答案，所以我想问一下如何设置旋转原点。例如，我将旋转的原点设置为 [200,200]，并且我想在偏移发生之前和之后保留旋转的原点。我试过setTransformOriginPoint但它不起作用，它仍然需要 [0,0] 作为旋转的原点。谢谢。
例子：
from PySide2 import QtCore, QtGui, QtWidgets
from PySide2.QtCore import QRectF, QPointF
from PySide2.QtGui import QImage, QPen, Qt
from PySide2.QtWidgets import QMainWindow, QGraphicsItem, QApplication, QGridLayout, QHBoxLayout, QLineEdit, QPushButton
import cv2
import sys
import numpy as np
class MainWindow(QMainWindow):
def __init__(self, parent=None):
QMainWindow.__init__(self, parent)
self.setWindowTitle('Transform')
self.setFixedHeight(800)
self.setFixedWidth(1200)
self.main_widget = QtWidgets.QWidget(self)
self.main_widget.setFocus()
self.setCentralWidget(self.main_widget)
self.view = GraphicsView(self)
self.setPicture()
self.setLayoutFce()
self.action()
self.setRect()
def setLayoutFce(self):
self.butt = QPushButton('OK')
self.qlineedit1 = QLineEdit()
self.qlineedit1.setPlaceholderText('Transl. X')
self.qlineedit2 = QLineEdit()
self.qlineedit2.setPlaceholderText('Transl. Y')
self.qlineedit3 = QLineEdit()
self.qlineedit3.setPlaceholderText('Rotation')
self.hlay = QHBoxLayout(self.main_widget)
self.grid = QGridLayout()
self.hlay.addLayout(self.grid, 2)
self.hlay.addWidget(self.view, 8)
self.grid.addWidget(self.butt,1,1)
self.grid.addWidget(self.qlineedit1,1,2)
self.grid.addWidget(self.qlineedit2,1,3)
self.grid.addWidget(self.qlineedit3,1,4)
def action(self):
self.butt.clicked.connect(self.button)
def setRect(self):
print('button 1')
self.copyPctrImage = self.picture.copy()
cv2.circle(self.copyPctrImage, (200, 200), 3, (150, 0, 150), 3)
cv2.putText(self.copyPctrImage, 'Origin Point',(220,220), cv2.FONT_HERSHEY_PLAIN, 1, (0,0,255,2))
rgbObrImage = cv2.cvtColor(self.copyPctrImage, cv2.COLOR_BGR2RGB)
qObrImage = QImage(rgbObrImage.data, rgbObrImage.shape[1], rgbObrImage.shape[0], QImage.Format_RGB888)
self.view.setPhoto(QtGui.QPixmap(qObrImage))
a = 100
b = 200
xAxis = 200
yAxis = 200
penColor = QPen(QtGui.QColor(255, 150, 0))
penColor.setWidth(4)
self.objektRect = RectItem(QRectF(xAxis - int(a / 2), yAxis - int(b / 2), a, b))
self.objektRect.setPen(penColor)
self.view._graphicsScene.addItem(self.objektRect)
def setPicture(self):
height = 1000
width = 1000
self.picture = np.zeros((height, width, 3), np.uint8)
self.picture[::] = (255, 0, 0)
rgbObrImage = cv2.cvtColor(self.picture, cv2.COLOR_BGR2RGB)
qObrImage = QImage(rgbObrImage.data, rgbObrImage.shape[1], rgbObrImage.shape[0], QImage.Format_RGB888)
self.view.setPhoto(QtGui.QPixmap(qObrImage))
def button(self):
a = 100
b = 200
xAxis = 200
yAxis = 200
for itemRect in self.view._graphicsScene.items():
if itemRect.__class__.__name__ == 'RectItem':
print('RectItem')
posx = int(self.qlineedit1.text())
posy = int(self.qlineedit2.text())
rot = int(self.qlineedit3.text())
for i in range(0,10):
if rot:
rot += i
transform = QtGui.QTransform()
itemRect.setTransformOriginPoint(QPointF(xAxis, yAxis))
transform.translate(posx, posy).rotate(float(rot),axis=Qt.ZAxis)
#transform.rotate(rot)
#transform.rotate(rot).translate(posx, posy)
itemRect.setTransform(transform)
cv2.waitKey(1000)
class GraphicsView(QtWidgets.QGraphicsView):
def __init__(self, parent):
super(GraphicsView, self).__init__(parent)
self.val_zoom = 0
self.val_empty = True
self._graphicsScene = QtWidgets.QGraphicsScene(self)
self._mapaPixmap = QtWidgets.QGraphicsPixmapItem()
self._graphicsScene.addItem(self._mapaPixmap)
self.setScene(self._graphicsScene)
self.setTransformationAnchor(QtWidgets.QGraphicsView.AnchorUnderMouse)
self.setResizeAnchor(QtWidgets.QGraphicsView.AnchorUnderMouse)
# self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
# self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setBackgroundBrush(QtGui.QBrush(QtGui.QColor(30, 30, 30)))
self.setFrameShape(QtWidgets.QFrame.NoFrame)
def nactenaMapa(self):
return not self.val_empty
def fitWindow(self, scale=True):
rect = QtCore.QRectF(self._mapaPixmap.pixmap().rect())
if not rect.isNull():
self.setSceneRect(rect)
if self.nactenaMapa():
unity = self.transform().mapRect(QtCore.QRectF(0, 0, 1, 1))
self.scale(1 / unity.width(), 1 / unity.height())
viewrect = self.viewport().rect()
scenerect = self.transform().mapRect(rect)
factor = min(viewrect.width() / scenerect.width(),
viewrect.height() / scenerect.height())
self.scale(factor, factor)
self.val_zoom = 0
def setPhoto(self, pixmap=None):
self.val_zoom = 0
if pixmap and not pixmap.isNull():
self.val_empty = False
self.setDragMode(QtWidgets.QGraphicsView.ScrollHandDrag)
self._mapaPixmap.setPixmap(pixmap)
else:
self.val_empty = True
self.setDragMode(QtWidgets.QGraphicsView.NoDrag)
self._mapaPixmap.setPixmap(QtGui.QPixmap())
def wheelEvent(self, event):
if self.nactenaMapa():
if event.angleDelta().y() > 0:
factor = 1.25
self.val_zoom += 1
else:
factor = 0.8
self.val_zoom -= 1
if self.val_zoom > 0:
self.scale(factor, factor)
elif self.val_zoom == 0:
self.fitWindow()
else:
self.val_zoom = 0
def toggleDragMode(self):
if self.dragMode() == QtWidgets.QGraphicsView.ScrollHandDrag:
self.setDragMode(QtWidgets.QGraphicsView.NoDrag)
elif not self._mapaPixmap.pixmap().isNull():
self.setDragMode(QtWidgets.QGraphicsView.ScrollHandDrag)
def mousePressEvent(self, event):
if self._mapaPixmap.isUnderMouse():
self.souradniceMys.emit(self.mapToScene(event.pos()).toPoint())
super(GraphicsView, self).mousePressEvent(event)
class RectItem(QtWidgets.QGraphicsRectItem):
def paint(self, painter, option, widget=None):
super(RectItem, self).paint(painter, option, widget)
painter.save()
#painter.setRenderHint(QtGui.QPainter.Antialiasing)
#painter.setBrush(QtCore.Qt.red)
#painter.drawEllipse(option.rect)
painter.setPen(QPen(QtGui.QColor(255,255,0)))
self.setFlag(QGraphicsItem.ItemIsSelectable, True)
#painter.drawRect(option.rect)
#path = QtGui.QPainterPath()
#path.addRoundedRect(QtCore.QRect(50,50,200,100), 20,20)
#path.addRect(QtCore.QRect(200,50,50,50))
#path.addRect(QtCore.QRect(50,100,50,50))
#painter.drawPath(path.simplified())
painter.restore()
if __name__ == '__main__':
app = QApplication(sys.argv)
wd = MainWindow()
wd.show()
sys.exit(app.exec_())