1
我的程序是用Python3.5和PyQt5编写的。我在我的类中添加了一些自定义小部件到QTableWidget的方法。当我从类内部调用函数并且更改QTablewidget的cellwidgets时，但是当我从另一个自定义类调用它时，它不会更改小部件。我检查了项目和索引的变化，但新的cellwidgets没有显示。问题是什么？ 这是我的代码：QTablewidget在PyQt5中不显示新的cellWidgets
class mainmenupage(QWidget):
elist = []
def __init__(self):
#the main window widget features
self.setObjectName("mainpage")
self.resize(800, 480)
sizePolicy = QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.sizePolicy().hasHeightForWidth())
self.setSizePolicy(sizePolicy)
self.setMinimumSize(QSize(800, 480))
self.setMaximumSize(QSize(800, 480))
#the QTreeWidget features
self.category_tree = QTreeWidget(self)
self.category_tree.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.category_tree.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.category_tree.setGeometry(QRect(630, 90, 161, 381))
self.category_tree.setLayoutDirection(Qt.RightToLeft)
self.category_tree.setLocale(QLocale(QLocale.Persian, QLocale.Iran))
self.category_tree.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.category_tree.setUniformRowHeights(False)
self.category_tree.setColumnCount(1)
self.category_tree.setObjectName("category_tree")
self.category_tree.headerItem().setText(0, "1")
self.category_tree.setFrameShape(QFrame.NoFrame)
self.category_tree.header().setVisible(False)
self.category_tree.header().setSortIndicatorShown(False)
self.category_tree.setFocusPolicy(Qt.NoFocus))
#the QTableWidget features. It comes from the custom class myTableWidget
self.main_table = myTableWidget(self)
self.main_table.setGeometry(QRect(20, 140, 600, 330))
sizePolicy = QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.main_table.sizePolicy().hasHeightForWidth())
self.main_table.setSizePolicy(sizePolicy)
self.main_table.setMinimumSize(QSize(0, 0))
self.main_table.setLayoutDirection(Qt.LeftToRight)
self.main_table.setLocale(QLocale(QLocale.Persian, QLocale.Iran))
self.main_table.setInputMethodHints(Qt.ImhNone)
self.main_table.setFrameShape(QFrame.NoFrame)
self.main_table.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.main_table.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.main_table.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.main_table.setTabKeyNavigation(False)
self.main_table.setShowGrid(False)
self.main_table.setCornerButtonEnabled(False)
self.main_table.setUpdatesEnabled(True)
self.main_table.setRowCount(2)
self.main_table.setColumnCount(2)
self.main_table.setObjectName("main_table")
self.main_table.horizontalHeader().setVisible(False)
self.main_table.horizontalHeader().setHighlightSections(False)
self.main_table.verticalHeader().setVisible(False)
self.main_table.verticalHeader().setHighlightSections(False)
self.main_table.setFocusPolicy(Qt.NoFocus)
self.main_table.setSelectionMode(QAbstractItemView.NoSelection)
self.main_table.horizontalHeader().setDefaultSectionSize(300)
self.main_table.verticalHeader().setDefaultSectionSize(165)
self.category_tree.itemPressed.connect(self.insertdata)
def insertdata(self,subcat):
#get the text of clicked item from qtreewidget
item = self.category_tree.currentItem().text(0)
#get data from DB
datas = self.conn.retrievedata('*','words',"subcat='{}'".format(item))
#check if the list of copied data is empty or not
if mainmenupage.elist != []:
del mainmenupage.elist[:]
#if the list is empty, the data received from DB appends to it
if mainmenupage.elist == []:
for data in datas:
mainmenupage.elist.append(data)
#delete the first index of copied list because it isn't needed here
mainmenupage.elist = mainmenupage.elist[1:]
# calls the populatemain function for populating qtablewidget with these datas with a custom index e.g. index 5 to 9.
self.populatemain(5,9)
def populatemain(self,startindexdata,endindexdata):
#make a list for indexes of items that will be added to qtablewidget
mtl=[]
for i in range(2):
for j in range(2):
mtl.append(i)
mtl.append(j)
#adding custom widgets as cellWidgets to qtablewidget
for index, my in enumerate(zip(*[iter(mtl)]*2)):
if mainmenupage.elist != []:
data = mainmenupage.elist[startindexdata:endindexdata][index]
exec("self.iteM{} = CustomWidget('{}','content/img/food.png')".format(data[0],data[4]))
exec("self.main_table.setCellWidget({} ,{}, self.iteM{})".format(*my,data[0]))
class myTableWidget(QTableWidget):
def checking(self):
if (self.endgingposx - self.startingposx) <= -50:
#a custom function for checking that if the user made a swipe to left on the qtablewidget for chaning it's content
if mainmenupage.elist != []:
#make an instance from the previous class for accessing to populatemain method
x = mainmenupage()
#calling populatemain method for changing widgets in qtablewidget with the items made from different indexes of the copied data list e.g. indexes 0 to 4. but i don't know why this doesn't change the items. The populatemain function runs correctly it can be checked by putting print statement in it but it doesn't change the Qtablewidget contents.
x.populatemain(0,4)
def mousePressEvent(self,event):
super().mousePressEvent(event)
self.startingposx = event.x()
def mouseReleaseEvent(self,event):
super().mouseReleaseEvent(event)
self.endgingposx = event.x()
self.checking()
class CustomWidget(QWidget):
def __init__(self, text, img, parent=None):
QWidget.__init__(self, parent)
self._text = text
self._img = img
self.setLayout(QVBoxLayout())
self.lbPixmap = QLabel(self)
self.lbText = QLabel(self)
self.lbText.setAlignment(Qt.AlignCenter)
self.layout().addWidget(self.lbPixmap)
self.layout().addWidget(self.lbText)
self.initUi()
def initUi(self):
self.lbPixmap.setPixmap(QPixmap(self._img).scaled(260,135,Qt.IgnoreAspectRatio,transformMode = Qt.SmoothTransformation))
self.lbText.setText(self._text)
@pyqtProperty(str)
def img(self):
return self._img
@img.setter
def total(self, value):
if self._img == value:
return
self._img = value
self.initUi()
@pyqtProperty(str)
def text(self):
return self._text
@text.setter
def text(self, value):
if self._text == value:
return
self._text = value
self.initUi()
self.category_tree是QTreeWidget
self.main_table是QTableWidget的
为了完成我的问题。当我点击其中一个self.category_tree items时，它会调用insertdata。在insertdata的最后一行，我打电话self.populatemain(5,9)它将4个自定义小部件添加到我的表格中，但当从类的类调用populatemain与其他索引qtablewidget项不会更改。怎么了？ 预先感谢您。
你的代码很难调试，但是一个常见的初学者错误是你没有设置列和行的数量，也就是说，如果你想在位置i，j插入这个小部件，那么这个位置必须存在，所以行数和列数必须大于aiyj，在你的情况下，在添加小部件之前使用下面的代码'self.main_table.setRowCount（2）self.main_table.setColumnCount（2）'。 – eyllanesc
是的你是对的我有这段代码。在#some代码部分我已经写了这两行。因为如此，如果你看到我说的项目来表时，我点击类别项目和填充主要功能发生两次。但我不知道为什么该函数被该检查函数调用的时间没有显示新项目。 @eyllanesc – Nimda
如果你没有给我看一个可以测试的代码，我不能给你任何更多的建议，因为目前的代码无法执行它，如果代码很广泛，它可以被Dropbox，驱动器等共享。 – eyllanesc