我有以下显示数据网格的 pyqt 代码。
我能够单击一个字母，打开一个文本输入框并成功将数据保存到网格并在终端中打印更新的数据。
我努力了update() and repaint()但他们什么也没做，并打电话给createLayout()方法抛出错误QLayout: Attempting to add QLayout "" to Widget "", which already has a layout
如何刷新网格/小部件/布局以显示新数据？
from PyQt5 import QtWidgets, QtCore, QtGui
import string
grid = [[["text", "GREEN"], 0, ["text", "RED"], 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0]]
BTN = """QPushButton{{font-weight: bold; color: {};
font-size: 14px; background-color: {};
border-width: 2px; border-radius: 100px}}"""
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
self.letter_count = dict(zip(string.ascii_uppercase, [x for x in range(26)]))
self.initUI()
self.createLayout()
self.center_widget()
def initUI(self):
p = self.palette()
gradient = QtGui.QLinearGradient(0, 0, 0, 400)
gradient.setColorAt(0.0, QtGui.QColor('#f1f1f1'))
gradient.setColorAt(1.0, QtGui.QColor('#00a1de'))
p.setBrush(QtGui.QPalette.Window, QtGui.QBrush(gradient))
self.setPalette(p)
def createLayout(self):
hlay = QtWidgets.QHBoxLayout(self)
frameL = QtWidgets.QFrame()
vlay = QtWidgets.QVBoxLayout(frameL)
frame = QtWidgets.QFrame()
frame.setObjectName("principal")
frame.setStyleSheet("#principal{border: 2px solid white;}")
hlay.addWidget(frameL)
hlay.addWidget(frame)
gridLayout = QtWidgets.QGridLayout(frame)
h = 60 # height
for i, row in enumerate(grid):
letter = "{}".format(string.ascii_uppercase[i])
frameButton = QtWidgets.QFrame()
frameButton.setFixedHeight(h)
frameButton.setContentsMargins(0, 0, 0, 0)
lay = QtWidgets.QVBoxLayout(frameButton)
button = QtWidgets.QPushButton(letter)
button.setCursor(QtGui.QCursor(QtCore.Qt.PointingHandCursor))
button.clicked.connect(lambda x, letter=letter: self.populate_row(letter)) # Every button click returns 'J'
lay.addWidget(button)
vlay.addWidget(frameButton)
for j, val in enumerate(row):
gridButton = QtWidgets.QPushButton()
gridButton.setFixedSize(h, h)
if isinstance(val, list):
gridButton.setText(val[0])
if val[1] == "GREEN":
gridButton.setStyleSheet(BTN.format('white', 'green'))
elif val[1] == "RED":
gridButton.setStyleSheet(BTN.format('white', 'red'))
else:
gridButton.setStyleSheet(BTN.format('black', 'white'))
gridButton.setText("{}".format(val))
gridLayout.addWidget(gridButton, i, j)
for ix in range(j + 1):
label = QtWidgets.QLabel("{}".format(ix + 1))
label.setAlignment(QtCore.Qt.AlignCenter)
gridLayout.addWidget(label, i + 1, ix)
vlay.addWidget(QtWidgets.QLabel())
def center_widget(self):
self.window().setGeometry(
QtWidgets.QStyle.alignedRect(
QtCore.Qt.LeftToRight,
QtCore.Qt.AlignCenter,
self.window().size(),
QtWidgets.QApplication.desktop().availableGeometry())
)
def populate_row(self, letter):
""" Populate the row from index 0 - end """
print(letter)
self.wi = QtWidgets.QWidget()
self.wi.resize(660, 360)
textBox = QtWidgets.QPlainTextEdit(self.wi)
Rbtn = QtWidgets.QPushButton('Add To Row')
Rbtn.clicked.connect(lambda: self.input_to_grid(textBox.toPlainText(), letter))
layout = QtWidgets.QVBoxLayout()
layout.addWidget(textBox)
layout.addWidget(Rbtn)
Rbtn.move(600, 300)
self.wi.setLayout(layout)
self.wi.show()
return self.wi
def input_to_grid(self, text, letter):
print(text, letter)
lst = text.split(' ')
for i, x in enumerate(lst):
self.add_to_grid((letter, i + 1), x)
print((letter, i + 1), x)
self.print_grid()
def add_to_grid(self, loc, item):
x, y = self.translate(loc)
grid[x][y] = [item]
def translate(self, loc):
for k, v in self.letter_count.items():
if loc[0].upper() == k:
x = v
y = int(loc[1]) - 1
return x, y
def print_grid(self):
""" Print the grid prettier than normal.. """
print('\n'.join(['\t'.join([str(c) for c in r]) for r in grid]))
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
