QGraphicsView 开始时大小错误
QGraphicsView wrong size at start
我有一个问题,我制作了一个内部有 2 个矩形的 QGraphicsView。我希望它们在我调整对话框大小时也能调整大小,所以我重写了一个对话框 class。它有效,但在开始时我有错误大小的矩形
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QGraphicsScene, QGraphicsEllipseItem
import sys
# Redéfinition de dialog pour utiliser resize event
class MyDialog (QtWidgets.QDialog) :
def resizeEvent(self, event):
print("resize")
#print(view.sceneRect())
view.fitInView(scene.sceneRect(), QtCore.Qt.KeepAspectRatio) ######## I DONT KNOW WHY THIS LINE MAKE THE VIEW TOO SMALL AT START
QtWidgets.QDialog.resizeEvent(self, event)
#view.fitInView(rectangle)
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(556, 580)
self.verticalLayout = QtWidgets.QVBoxLayout(Dialog)
self.verticalLayout.setObjectName("verticalLayout")
self.graphicsView = QtWidgets.QGraphicsView(Dialog)
self.graphicsView.setObjectName("graphicsView")
self.verticalLayout.addWidget(self.graphicsView)
global view
view = self.graphicsView
triangle = QtWidgets.QGraphicsRectItem(10,10,200,200)
rectangle = QtWidgets.QGraphicsRectItem(100,100,200,200)
global scene
scene = QtWidgets.QGraphicsScene()
scene.addItem(rectangle)
scene.addItem(triangle)
self.graphicsView.setScene(scene)
#self.graphicsView.fitInView(scene.sceneRect(), QtCore.Qt.KeepAspectRatio)
#view.fitInView(scene.sceneRect(), QtCore.Qt.KeepAspectRatio)
self.graphicsView_2 = QtWidgets.QGraphicsView(Dialog)
self.graphicsView_2.setObjectName("graphicsView_2")
self.verticalLayout.addWidget(self.graphicsView_2)
self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
self.buttonBox.setObjectName("buttonBox")
self.verticalLayout.addWidget(self.buttonBox)
self.retranslateUi(Dialog)
self.buttonBox.accepted.connect(Dialog.accept)
self.buttonBox.rejected.connect(Dialog.reject)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = MyDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
当我启动 QDialog 时它看起来像这样
当我调整 window 的大小时,我希望它看起来像
注意:建议不要修改 Qt Designer 生成的代码,因此要使我的答案生效,您必须使用 pyuic5 重新生成文件:pyuic5 your_file.ui -o gui.py -x
.
所以fitInView方法使用了一些属性直到它使QGraphicsView可见才更新,所以解决方法是验证它是否可见:
main.py
from PyQt5 import QtCore, QtGui, QtWidgets
from gui import Ui_Dialog
class MyDialog(QtWidgets.QDialog, Ui_Dialog):
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
triangle = QtWidgets.QGraphicsRectItem(10, 10, 200, 200)
rectangle = QtWidgets.QGraphicsRectItem(100, 100, 200, 200)
scene = QtWidgets.QGraphicsScene()
scene.addItem(rectangle)
scene.addItem(triangle)
self.graphicsView.setScene(scene)
def resizeEvent(self, event):
if self.isVisible():
self.graphicsView.fitInView(
self.graphicsView.scene().sceneRect(), QtCore.Qt.KeepAspectRatio
)
super().resizeEvent(event)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MyDialog()
w.show()
sys.exit(app.exec_())
我有一个问题,我制作了一个内部有 2 个矩形的 QGraphicsView。我希望它们在我调整对话框大小时也能调整大小,所以我重写了一个对话框 class。它有效,但在开始时我有错误大小的矩形
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QGraphicsScene, QGraphicsEllipseItem
import sys
# Redéfinition de dialog pour utiliser resize event
class MyDialog (QtWidgets.QDialog) :
def resizeEvent(self, event):
print("resize")
#print(view.sceneRect())
view.fitInView(scene.sceneRect(), QtCore.Qt.KeepAspectRatio) ######## I DONT KNOW WHY THIS LINE MAKE THE VIEW TOO SMALL AT START
QtWidgets.QDialog.resizeEvent(self, event)
#view.fitInView(rectangle)
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(556, 580)
self.verticalLayout = QtWidgets.QVBoxLayout(Dialog)
self.verticalLayout.setObjectName("verticalLayout")
self.graphicsView = QtWidgets.QGraphicsView(Dialog)
self.graphicsView.setObjectName("graphicsView")
self.verticalLayout.addWidget(self.graphicsView)
global view
view = self.graphicsView
triangle = QtWidgets.QGraphicsRectItem(10,10,200,200)
rectangle = QtWidgets.QGraphicsRectItem(100,100,200,200)
global scene
scene = QtWidgets.QGraphicsScene()
scene.addItem(rectangle)
scene.addItem(triangle)
self.graphicsView.setScene(scene)
#self.graphicsView.fitInView(scene.sceneRect(), QtCore.Qt.KeepAspectRatio)
#view.fitInView(scene.sceneRect(), QtCore.Qt.KeepAspectRatio)
self.graphicsView_2 = QtWidgets.QGraphicsView(Dialog)
self.graphicsView_2.setObjectName("graphicsView_2")
self.verticalLayout.addWidget(self.graphicsView_2)
self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
self.buttonBox.setObjectName("buttonBox")
self.verticalLayout.addWidget(self.buttonBox)
self.retranslateUi(Dialog)
self.buttonBox.accepted.connect(Dialog.accept)
self.buttonBox.rejected.connect(Dialog.reject)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = MyDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
当我启动 QDialog 时它看起来像这样
当我调整 window 的大小时,我希望它看起来像
注意:建议不要修改 Qt Designer 生成的代码,因此要使我的答案生效,您必须使用 pyuic5 重新生成文件:pyuic5 your_file.ui -o gui.py -x
.
所以fitInView方法使用了一些属性直到它使QGraphicsView可见才更新,所以解决方法是验证它是否可见:
main.py
from PyQt5 import QtCore, QtGui, QtWidgets
from gui import Ui_Dialog
class MyDialog(QtWidgets.QDialog, Ui_Dialog):
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
triangle = QtWidgets.QGraphicsRectItem(10, 10, 200, 200)
rectangle = QtWidgets.QGraphicsRectItem(100, 100, 200, 200)
scene = QtWidgets.QGraphicsScene()
scene.addItem(rectangle)
scene.addItem(triangle)
self.graphicsView.setScene(scene)
def resizeEvent(self, event):
if self.isVisible():
self.graphicsView.fitInView(
self.graphicsView.scene().sceneRect(), QtCore.Qt.KeepAspectRatio
)
super().resizeEvent(event)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MyDialog()
w.show()
sys.exit(app.exec_())