就像标题所说的那样，我正在尝试在现有的 QGraphicsView 中绘图。我使用 QT Designer 生成的窗口，我想在 QGraphicsView 内绘制一个 16x16 正方形的矩阵。
这是我目前拥有的代码:
窗口:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.8.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(911, 567)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(20, 10, 301, 31))
font = QtGui.QFont()
font.setPointSize(12)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setObjectName("label")
self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
self.groupBox.setGeometry(QtCore.QRect(620, 40, 271, 91))
font = QtGui.QFont()
font.setBold(True)
font.setWeight(75)
self.groupBox.setFont(font)
self.groupBox.setObjectName("groupBox")
self.rdtest = QtWidgets.QRadioButton(self.groupBox)
self.rdtest.setGeometry(QtCore.QRect(60, 60, 101, 22))
self.rdtest.setObjectName("rdtest")
self.rdtrain = QtWidgets.QRadioButton(self.groupBox)
self.rdtrain.setGeometry(QtCore.QRect(60, 30, 101, 22))
self.rdtrain.setObjectName("rdtrain")
self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)
self.graphicsView.setGeometry(QtCore.QRect(10, 40, 601, 411))
self.graphicsView.setObjectName("graphicsView")
self.clear = QtWidgets.QPushButton(self.centralwidget)
self.clear.setGeometry(QtCore.QRect(10, 470, 88, 29))
self.clear.setObjectName("clear")
self.trainNewInput = QtWidgets.QPushButton(self.centralwidget)
self.trainNewInput.setGeometry(QtCore.QRect(500, 470, 111, 29))
self.trainNewInput.setObjectName("trainNewInput")
self.trainbox = QtWidgets.QGroupBox(self.centralwidget)
self.trainbox.setGeometry(QtCore.QRect(620, 150, 271, 171))
font = QtGui.QFont()
font.setBold(True)
font.setWeight(75)
self.trainbox.setFont(font)
self.trainbox.setObjectName("trainbox")
self.vtrain = QtWidgets.QLineEdit(self.trainbox)
self.vtrain.setGeometry(QtCore.QRect(100, 70, 101, 29))
self.vtrain.setObjectName("vtrain")
self.label_2 = QtWidgets.QLabel(self.trainbox)
self.label_2.setGeometry(QtCore.QRect(40, 70, 56, 31))
font = QtGui.QFont()
font.setBold(True)
font.setWeight(75)
self.label_2.setFont(font)
self.label_2.setObjectName("label_2")
self.trainDefault = QtWidgets.QPushButton(self.trainbox)
self.trainDefault.setGeometry(QtCore.QRect(40, 30, 161, 29))
self.trainDefault.setObjectName("trainDefault")
self.output = QtWidgets.QLabel(self.trainbox)
self.output.setGeometry(QtCore.QRect(10, 130, 271, 17))
self.output.setText("")
self.output.setObjectName("output")
self.output_2 = QtWidgets.QLabel(self.trainbox)
self.output_2.setGeometry(QtCore.QRect(10, 150, 271, 17))
self.output_2.setText("")
self.output_2.setObjectName("output_2")
self.testbox = QtWidgets.QGroupBox(self.centralwidget)
self.testbox.setGeometry(QtCore.QRect(620, 330, 271, 171))
font = QtGui.QFont()
font.setBold(True)
font.setWeight(75)
self.testbox.setFont(font)
self.testbox.setObjectName("testbox")
self.pushButton = QtWidgets.QPushButton(self.testbox)
self.pushButton.setGeometry(QtCore.QRect(50, 40, 161, 29))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 911, 23))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "RNA: Numeros "))
self.groupBox.setTitle(_translate("MainWindow", "Opciones:"))
self.rdtest.setText(_translate("MainWindow", "Test"))
self.rdtrain.setText(_translate("MainWindow", "Train"))
self.clear.setText(_translate("MainWindow", "Clear"))
self.trainNewInput.setText(_translate("MainWindow", "Train new Input"))
self.trainbox.setTitle(_translate("MainWindow", "Train:"))
self.label_2.setText(_translate("MainWindow", "% Test:"))
self.trainDefault.setText(_translate("MainWindow", "Train Default Data"))
self.testbox.setTitle(_translate("MainWindow", "Test:"))
self.pushButton.setText(_translate("MainWindow", "Start Test"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
逻辑类，我想在其中创建一个从窗口绘制 QGraphicsView 的方法:
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QGraphicsScene
from PyQt5.QtCore import (QLineF, QPointF, QRectF, Qt)
from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtWidgets import (QApplication, QGraphicsView, QGraphicsScene, QGraphicsItem,
QGridLayout, QVBoxLayout, QHBoxLayout,
QLabel, QLineEdit, QPushButton)
from window import Ui_MainWindow
from RNA import NumberIA
train = []
train_r = []
test = []
test_r = []
class MyFirstGuiProgram(Ui_MainWindow):
def __init__(self, dialog):
Ui_MainWindow.__init__(self)
self.setupUi(dialog)
self.rdtrain.setChecked(True)
# Connect "add" button with a custom function (addInputTextToListbox)
self.clear.clicked.connect(self.addInputTextToListbox)
self.trainDefault.clicked.connect(self.t_DefaultData)
self.rdtest.clicked.connect(self.enableTest)
self.rdtrain.clicked.connect(self.enableTrain)
def enableTest(self):
self.trainbox.setEnabled(False)
self.trainNewInput.setEnabled(False)
self.testbox.setEnabled(True)
def drawSomething(self):
tes = "f"
def enableTrain(self):
self.trainbox.setEnabled(True)
self.trainNewInput.setEnabled(True)
self.testbox.setEnabled(False)
def addInputTextToListbox(self):
print("Hello world!!!")
def t_DefaultData(self):
ann = NumberIA()
t = self.vtrain.text()
print("Training data: ", t)
global train
global train_r
global test
global test_r
train, train_r, test, test_r = ann.read_file(float(t))
self.output.setText("Train complete...")
ann.crear_red(train, train_r)
accuracy, matrix = ann.probar_red(test, test_r)
self.output_2.setText("Accuracy: " + str(accuracy * 100) + "%")
print("Matris de Confusion:")
print('\n'.join([''.join(['{:4}'.format(item) for item in row])
for row in matrix]))
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = MyFirstGuiProgram(MainWindow)
MainWindow.show()
MainWindow.setWindowTitle("RNA: Inteligencia Artificial 2")
ui.enableTrain()
sys.exit(app.exec_())
我似乎无法在网上找到有关如何执行此操作的示例，我找到的示例对我来说很模糊，似乎无法弄清楚。
最佳答案
我建议你继承QMainWindow并实现Ui_MainWindow接口(interface)，要在QGraphicsView中绘制你必须使用QGraphicsScene，并使用它的方法，在本例中使用 addRect()。
from PyQt5 import QtCore, QtGui, QtWidgets
class MyFirstGuiProgram(QtWidgets.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
QtWidgets.QMainWindow.__init__(self, parent=parent)
self.setupUi(self)
scene = QtWidgets.QGraphicsScene()
self.graphicsView.setScene(scene)
pen = QtGui.QPen(QtCore.Qt.green)
side = 20
for i in range(16):
for j in range(16):
r = QtCore.QRectF(QtCore.QPointF(i*side, j*side), QtCore.QSizeF(side, side))
scene.addRect(r, pen)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = MyFirstGuiProgram()
w.show()
sys.exit(app.exec_())
关于python - 如何在现有的 QGraphicsVIew 中绘图？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44193227/