Question

随函附上:

import sys, logging, datetime

from PyQt5 import QtWidgets, QtCore, QtGui
from PyQt5.Qt import QVBoxLayout

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        self.__class__.instance = self
        self.resize(1200, 1600) # w, h
        main_splitter = QtWidgets.QSplitter(self)
        main_splitter.setOrientation(QtCore.Qt.Vertical)
        self.setCentralWidget(main_splitter)
        self.top_frame = QtWidgets.QFrame()
        main_splitter.addWidget(self.top_frame)
        self.bottom_frame = BottomFrame()
        self.bottom_frame.setMaximumHeight(350)                
        self.bottom_frame.setMinimumHeight(100)
        main_splitter.addWidget(self.bottom_frame)
        main_splitter.setCollapsible(1, False)
        self.bottom_frame.construct()
            
class BottomFrame(QtWidgets.QFrame):
    def construct(self):
        layout = QtWidgets.QVBoxLayout(self)
        # without this you get the default 10 px border all round the table: too much
        layout.setContentsMargins(1, 1, 1, 1)
        self.setLayout(layout)
        self.messages_table = LogTableView()
        layout.addWidget(self.messages_table)
        self.messages_table.visual_log( hello world )                
        self.messages_table.visual_log( message 2 qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd  )
        self.messages_table.visual_log( message 3 )
        self.messages_table.visual_log( message 4 , logging.ERROR)
        self.messages_table.visual_log( message 5 )
        self.messages_table.visual_log( message 6 qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd qunaomdd  )
        self.messages_table.visual_log( message 7 )
        
class LogTableView(QtWidgets.QTableView):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setModel(QtGui.QStandardItemModel())
        self.horizontalHeader().setStretchLastSection(True)
        self.horizontalHeader().hide()
        self.setVerticalHeader(VerticalHeader(self))
        self.verticalHeader().setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents)
        self.verticalHeader().hide()
        self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
        self.setAlternatingRowColors(True)
        # this doesn t seem to have any effect 
        # self.verticalHeader().setMinimumSectionSize(1)
        
    def sizeHintForRow(self, row ):
        hint = super().sizeHintForRow(row)
        # print(f size hint for row {row}: {hint} )
        # this doesn t seem to have any effect!
        if hint < 25 and hint > 10: 
            hint = 10
        return hint
        
    def visual_log(self, msg: str, log_level: int=logging.INFO):
        model = self.model()
        i_new_row = model.rowCount()
        model.insertRow(i_new_row)
        datetime_stamp_str = datetime.datetime.now().strftime( %a %H:%M:%S.%f )[:-3]
        model.setItem(i_new_row, 0, QtGui.QStandardItem(datetime_stamp_str))
        model.setItem(i_new_row, 1, QtGui.QStandardItem(str(log_level)))
        self.setColumnWidth(0, 160)
        self.setColumnWidth(1, 100)
        model.setItem(i_new_row, 2, QtGui.QStandardItem(msg))
        QtCore.QTimer.singleShot(0, self.resizeRowsToContents)
        QtCore.QTimer.singleShot(10, self.scrollToBottom)
            
class VerticalHeader(QtWidgets.QHeaderView):
    def __init__(self, parent):
        super().__init__(QtCore.Qt.Vertical, parent)
    
    def sectionSizeHint(self, logical_index):
        hint = super().sectionSizeHint(logical_index)
        print(f vh index {logical_index} hint {hint} )
        return hint

def main():
    app_instance = QtWidgets.QApplication(sys.argv)
    MainWindow().show()  
    sys.exit(app_instance.exec())
    
if __name__ ==  __main__ :
    main()

浏览高度为ALMOST。我想要做的是:试图改造主要窗口:表格浏览量根据案文的实际高度(按需要调整)调整其高度。

BUT... 如果你有一部案文,需要一行以上,使增长高度正确,则单线浏览量总是稍微高。sizeHintForRow(),QTableView方法似乎总是将24(pixels)从超级阶级退回......但即使我干预这一和残酷地说“no,使它成为一个较小的猎物”,但似乎后来一些东西方都推翻了。


<代码>垂直头盔的最低条码似乎也没有效果。
我还认为,表格模型的<代码>数据()方法可能是专有的,但作用13“SizeHintRole”似乎从未发射过。
Source code

I have tried looking at the source code. The method of interest here seems to be on l. 3523, one of several versions of QHeaderView s resizeSections method. The code is naturally quite daunting, but I did spot, for example, invalidateCachedSizeHint() on l. 3261, which might explain why the size hints are being ignored... Anyone with particularly intricate knowledge of QHeaderView s functionality? Update later After Musicamante suggested use of setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContent) (good idea), I don t now know what part of the source code is involved.
Screenshot


......单行浏览量略高。 如果你们看到一些不同的东西,就像完全紧缩的单行流一样,请让我知道。 页: 1 一位不同的顾问可能会产生不同的结果,谁知道?

Answer 1


The problem is twofold, as resizing to contents means that the header queries its own size requirements and the view s:

the header s defaultSectionSize(), minimumSectionSize() and sectionSizeFromContents();
the view s sizeHintForRow() (or sizeHintForColumn() for horizontal headers), which eventually queries the delegate s sizeHint() function;

当观察只显示一条线时,这种风格(即上面点击的头脑功能)会恢复违约高度,而这种距离可能比所显示的案文更长。
如果能够打字并显示一个以上线,所展示的文字通常需要比头部最终使用的更垂直的空间,而空间则会因缺省而增加,从而导致比单行方式小的视力。

为了实现一致的转轨,你必须执行一个习惯头,从<条形码>中恢复很小的大小,并且应当为<条码>>的“dfault SectionSize和<条码>确定任意小的大小。这样,这种观点将始终考虑到所展示案文的实际内容,其幅度将始终一致。

class VerticalHeader(QHeaderView):
    def __init__(self, parent):
        super().__init__(Qt.Vertical, parent)
        # we can set everything in here
        self.setSectionResizeMode(self.ResizeToContents)
        self.setDefaultSectionSize(1)
        self.setMinimumSectionSize(1)
        self.hide()

    def sectionSizeFromContents(self, index):
        size = super().sectionSizeFromContents(index)
        size.setHeight(1)
        return size

Note that sectionSizeFromContents() is also used to have the width of a modernheader, but since You re not showing the modernheader, a briefr return QSize( is means.

最后,你刚刚需要适当设立负责人;你不需要再在表格中超越<>代码>。

class LogTableView(QTableView):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # IMPORTANT! set the column count, so that we can automatically set 
        # the column widths
        self.setModel(QStandardItemModel(0, 3))
        self.setEditTriggers(QAbstractItemView.NoEditTriggers)
        self.setAlternatingRowColors(True)

        self.horizontalHeader().setStretchLastSection(True)
        self.horizontalHeader().hide()
        self.setVerticalHeader(VerticalHeader(self))

        self.setColumnWidth(0, 160)
        self.setColumnWidth(1, 100)

    ...

作为无关的注解,如果方案逻辑需要使用数字价值,你就应避免将数字转换为指示数。代表将在必要时自动将价值转换为指示数。

日期/时间数值也一样,因为它们可能要求适当执行(例如,分类或过滤):你只能使用适当的代表,以便<><>><>>>>。页: 1

class DateDelegate(QStyledItemDelegate):
    def displayText(self, value, locale):
        if isinstance(value, QDateTime):
            return value.toString( ddd HH:mm:ss.zzz )
        return super().displayText(value, locale)


class LogTableView(QTableView):
    def __init__(self, *args, **kwargs):
        ... # as above

        self.setItemDelegateForColumn(0, DateDelegate(self))

    def visual_log(self, msg: str, log_level: int=logging.INFO):
        model = self.model()
        i_new_row = model.rowCount()
        model.insertRow(i_new_row)

        datetime_item = QStandardItem()
        datetime_item.setData(QDateTime.currentDateTime(), Qt.DisplayRole)
        model.setItem(i_new_row, 0, datetime_item)

        log_item = QStandardItem()
        log_item.setData(log_level, Qt.DisplayRole)
        model.setItem(i_new_row, 1, log_item)

        model.setItem(i_new_row, 2, QStandardItem(msg))

友情链接