【发布时间】：2019-11-02 12:00:36
【问题描述】：
我为板子的可视化编写了一些代码，但我在初始化时遇到了问题。我想从头到尾生成充满木板的视图（是否显示在第三张图片上）。我尝试使用许多 Qt5 方法但没有结果（我是 Qt5 的初学者）。第一次调整大小后视图看起来很完美。
我不知道我在初始化时做错了什么。
就在 .show() 之后：
失焦后（我转写这个问题）：
如何修复此代码以使其在初始化时工作 - 我是 Qt5 的第 1 级（初学者）和编程的第 7 级。也许它需要非常简单的改变。
这是 Python 3.8/Qt5 的工作代码：
import logging
import sys
import typing
from PyQt5 import QtCore, QtGui
from PyQt5.QtCore import QSize, QPoint, Qt, QRect, QMargins
from PyQt5.QtGui import QFont, QPaintEvent, QPainter, QBrush, QColor, QPen
from PyQt5.QtWidgets import QApplication, QWidget, QGridLayout, QSizePolicy, QVBoxLayout, QHBoxLayout, QGraphicsWidget, \
QGraphicsScene, QGraphicsView, QGraphicsGridLayout, QStyleOptionGraphicsItem, QGraphicsSceneMouseEvent
class Application(QApplication):
pass
class SquareWidget(QGraphicsWidget):
def __init__(self, color):
super().__init__()
if color:
self.color = QtCore.Qt.white
else:
self.color = QtCore.Qt.black
def paint(self, painter: QtGui.QPainter, option: QStyleOptionGraphicsItem, widget: typing.Optional[QWidget] = ...) -> None:
painter.fillRect(option.rect, self.color)
class BoardContainer(QGraphicsWidget):
def __init__(self):
super().__init__()
logging.debug('size is %s for %s.', self.size(), self.__class__.__name__)
grid = QGraphicsGridLayout()
grid.setSpacing(0)
grid.setContentsMargins(0, 0, 0, 0)
self.setLayout(grid)
for row in range(8):
for column in range(8):
square_widget = SquareWidget((row + column) % 2)
grid.addItem(square_widget, row, column)
class BoardScene(QGraphicsScene):
def __init__(self):
super().__init__()
self.board_container = board_container = BoardContainer()
self.addItem(board_container)
class BoardView(QGraphicsView):
def __init__(self):
super().__init__()
logging.debug('size is %s for %s.', self.size(), self.__class__.__name__)
scene = BoardScene()
self.setScene(scene)
# no frame
self.setFrameShape(0)
# transparent background
# self.setStyleSheet('QGraphicsView {background: transparent;}')
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
def resizeEvent(self, event: QtGui.QResizeEvent) -> None:
super().resizeEvent(event)
self.fitInView(self.scene().board_container, Qt.KeepAspectRatio)
class BoardWidget(QWidget):
def __init__(self):
super().__init__()
logging.debug('size is %s for %s.', self.size(), self.__class__.__name__)
grid = QGridLayout()
board_view = BoardView()
grid.addWidget(board_view, 0, 0)
self.setLayout(grid)
def main():
# show exceptions
def excepthook(cls, exception, traceback):
sys.__excepthook__(cls, exception, traceback)
sys.excepthook = excepthook
logging.basicConfig(level=logging.DEBUG)
app = Application(sys.argv)
app.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling, True)
default_font = QFont()
default_font.setPointSize(12)
app.setFont(default_font)
board_widget = BoardWidget()
board_widget.setMinimumSize(640, 640)
board_widget.show()
sys.exit(app.exec())
if __name__ == '__main__':
main()
【问题讨论】：
标签： python python-3.x pyqt5 qt5