问题描述
我正在尝试对QtableWidget进行放大/缩小效果。 这样做我必须变 是Qfont对象的self.myfont和是int的self.table_size。
def zoomin(self):
fontsize = self.myfont.pointSize() + 1
if fontsize < 1:
fontsize = 1
self.myfont.setPointSize(fontsize)
self.table_size += 5
if self.table_size < 1:
self.table_size = 1
print(self.table_size,fontsize)
self.redrawCMLayout()
def zoomout(self):
fontsize = self.myfont.pointSize() - 1
if fontsize < 1:
fontsize = 1
self.myfont.setPointSize(fontsize)
self.table_size -= 5
if self.table_size < 1:
self.table_size = 1
print(self.table_size,fontsize)
self.redrawCMLayout()
这会更改我的两个变量。
然后我用
重画QtableWidget
self.tableWidget = QTableWidget()
self.tableWidget.verticalHeader().setDefaultSectionSize(self.table_size)
self.tableWidget.horizontalHeader().setDefaultSectionSize(self.table_size)
self.tableWidget.horizontalHeader().setFixedHeight(self.table_size)
self.tableWidget.verticalHeader().setFixedWidth(self.table_size)
self.tableWidget.horizontalHeader().setSectionResizeMode(QHeaderView.Fixed)
self.tableWidget.verticalHeader().setSectionResizeMode(QHeaderView.Fixed)
self.tableWidget.horizontalHeader().setFont(self.myfont)
self.tableWidget.verticalHeader().setFont(self.myfont)
当我放大时，效果很好
但是当我缩小时，水平标题宽度不再与垂直高度匹配。
我如何强迫它们即使宽度和高度很小也能使单元格平方？
这是MRE
import sys
import os
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
class ExampleWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.setMinimumSize(QSize(440,240))
self.setwindowTitle("PyQt5 Textarea example")
self.myarray = [[4,2,1],[6,3,7],[4,8],[3,1,0]]
self.myfont = QFont()
self.myfont.setPointSize(10)
self.table_size = 35
self.centralWidget = QWidget()
self.setCentralWidget(self.centralWidget)
self.gridCM = QHBoxLayout()
self.update_CMLayout()
zoomin = QAction('zoomin',self)
zoomin.setShortcut('Ctrl+shift+Z')
zoomin.setToolTip('Redo')
zoomin.triggered.connect(self.zoomin)
zoomout = QAction( 'zoomout',self)
zoomout.setShortcut('Ctrl+shift+Z')
zoomout.setToolTip('Redo')
zoomout.triggered.connect(self.zoomout)
# toolbar
toolbar = self.addToolBar('')
toolbar.addAction(zoomin)
toolbar.addAction(zoomout)
self.centralWidget.setLayout(self.gridCM)
def update_CMLayout(self):
print('update_CMLayout')
#self.gridCM = QHBoxLayout()
self.grid3_layout = qgroupbox('Connectivity Matrix')
grid3 = qgridLayout()
self.grid3_layout.setLayout(grid3)
self.tableWidget = QTableWidget()
self.tableWidget.horizontalHeader().setFont(self.myfont)
self.tableWidget.verticalHeader().setFont(self.myfont)
self.tableWidget.verticalHeader().setDefaultSectionSize(self.table_size)
self.tableWidget.horizontalHeader().setDefaultSectionSize(self.table_size)
self.tableWidget.horizontalHeader().setFixedHeight(self.table_size)
self.tableWidget.verticalHeader().setFixedWidth(self.table_size)
self.tableWidget.horizontalHeader().setSectionResizeMode(QHeaderView.Fixed)
self.tableWidget.verticalHeader().setSectionResizeMode(QHeaderView.Fixed)
line = len(self.myarray)
column = len(self.myarray[0])
self.tableWidget.setRowCount(line)
self.tableWidget.setColumnCount(column)
for c in range(column):
for l in range(line):
item = QTableWidgetItem(str(self.myarray[c][l]))
item.setFont(self.myfont)
item.setSizeHint(QSize(self.table_size,self.table_size))
self.tableWidget.setItem(c,l,item)
grid3.addWidget(self.tableWidget,1)
self.gridCM.insertWidget(0,self.grid3_layout)
def zoomin(self):
fontsize = self.myfont.pointSize() + 1
if fontsize < 1:
fontsize = 1
self.myfont.setPointSize(fontsize)
self.table_size += 5
if self.table_size < 1:
self.table_size = 1
print(self.table_size,fontsize)
self.redrawCMLayout()
def redrawCMLayout(self):
self.gridCM.removeWidget(self.grid3_layout)
self.grid3_layout.deleteLater()
self.grid3_layout = None
self.tableWidget.deleteLater()
self.tableWidget = None
self.update_CMLayout()
# self.layout_Main.insertItem(2,self.gridCM)
if __name__ == "__main__":
app = QApplication(sys.argv)
app.setStyle("Windows")
mainWin = ExampleWindow()
mainWin.show()
sys.exit( app.exec_() )
解决方法
您必须将setMinimumSectionSize设置为0。另一方面，与其删除并创建元素，不如重用它：
class Delegate(QStyledItemDelegate):
def sizeHint(self,option,index):
s = QStyledItemDelegate.sizeHint(self,index)
return max(s.width(),s.height()) * QSize(1,1)
class ExampleWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.myfont = QFont()
self.myfont.setPointSize(10)
self.setMinimumSize(QSize(440,240))
self.setWindowTitle("PyQt5 Textarea example")
self.myarray = [[4,2,1],[6,3,7],[4,8],[3,1,0]]
self.centralWidget = QWidget()
self.setCentralWidget(self.centralWidget)
self.gridCM = QHBoxLayout(self.centralWidget)
zoomin = QAction("zoomin",self)
zoomin.setShortcut("Ctrl+shift+Z")
zoomin.setToolTip("Redo")
zoomin.triggered.connect(self.zoomin)
zoomout = QAction("zoomout",self)
zoomout.setShortcut("Ctrl+shift+Z")
zoomout.setToolTip("Redo")
zoomout.triggered.connect(self.zoomout)
# toolbar
toolbar = self.addToolBar("")
toolbar.addAction(zoomin)
toolbar.addAction(zoomout)
self.grid3_layout = QGroupBox("Connectivity Matrix")
grid3 = QGridLayout()
self.grid3_layout.setLayout(grid3)
self.gridCM.insertWidget(0,self.grid3_layout)
self.tableWidget = QTableWidget()
grid3.addWidget(self.tableWidget,1)
line = len(self.myarray)
column = len(self.myarray[0])
self.tableWidget.setRowCount(line)
self.tableWidget.setColumnCount(column)
self.delegate = Delegate()
self.tableWidget.setItemDelegate(self.delegate)
for c,row in enumerate(self.myarray):
for r,e in enumerate(row):
item = QTableWidgetItem(str(e))
self.tableWidget.setItem(r,c,item)
for header in (
self.tableWidget.horizontalHeader(),self.tableWidget.verticalHeader(),):
header.setSectionResizeMode(QHeaderView.ResizeToContents)
header.setMinimumSectionSize(0)
self.update_font()
def zoomin(self):
self.myfont.setPointSize(self.myfont.pointSize() + 1)
self.update_font()
def zoomout(self):
if self.myfont.pointSize() > 1:
self.myfont.setPointSize(self.myfont.pointSize() - 1)
self.update_font()
def update_font(self):
self.tableWidget.setFont(self.myfont)