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解决第5章例子“numbers”对PyQt5+python3兼容性的问题 [复制链接]

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离线wps2000
 

只看楼主 倒序阅读 楼主  发表于: 2016-10-20
先上原来的代码,共是四个文件:numbers.pyw、numberformatdlg1.py、numberformatdlg2.py、numberformatdlg3.py

numbers.pyw

================================================================

import math
import random
import string
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import numberformatdlg1
import numberformatdlg2
import numberformatdlg3


class Form(QDialog):

    X_MAX = 26
    Y_MAX = 60

    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.numberFormatDlg = None
        self.format = dict(thousandsseparator=",",
                           decimalmarker=".", decimalplaces=2,
                           rednegatives=False)
        self.numbers = {}
        for x in range(self.X_MAX):
            for y in range(self.Y_MAX):
                self.numbers[(x, y)] = (10000 * random.random()) - 5000

        self.table = QTableWidget()
        formatButton1 = QPushButton("Set Number Format... "
                                    "(&Modal)")
        formatButton2 = QPushButton("Set Number Format... "
                                    "(Modele&ss)")
        formatButton3 = QPushButton("Set Number Format... "
                                    "(`&Live')")

        buttonLayout = QHBoxLayout()
        buttonLayout.addStretch()
        buttonLayout.addWidget(formatButton1)
        buttonLayout.addWidget(formatButton2)
        buttonLayout.addWidget(formatButton3)
        layout = QVBoxLayout()
        layout.addWidget(self.table)
        layout.addLayout(buttonLayout)
        self.setLayout(layout)

        self.connect(formatButton1, SIGNAL("clicked()"),
                     self.setNumberFormat1)
        self.connect(formatButton2, SIGNAL("clicked()"),
                     self.setNumberFormat2)
        self.connect(formatButton3, SIGNAL("clicked()"),
                     self.setNumberFormat3)
        self.setWindowTitle("Numbers")
        self.refreshTable()


    def refreshTable(self):
        self.table.clear()
        self.table.setColumnCount(self.X_MAX)
        self.table.setRowCount(self.Y_MAX)
        self.table.setHorizontalHeaderLabels(
                list(string.ascii_uppercase))
        for x in range(self.X_MAX):
            for y in range(self.Y_MAX):
                fraction, whole = math.modf(self.numbers[(x, y)])
                sign = "-" if whole < 0 else ""
                whole = "%d" % math.floor(abs(whole))
                digits = []
                for i, digit in enumerate(reversed(whole)):
                    if i and i % 3 == 0:
                        digits.insert(0, self.format["thousandsseparator"])
                    digits.insert(0, digit)
                if self.format["decimalplaces"]:
                    fraction = "%0.7f" % abs(fraction)
                    fraction = (self.format["decimalmarker"] +
                                fraction[2:self.format["decimalplaces"]
                                + 2])
                else:
                    fraction = ""
                text = "%s%s%s" % (sign, "".join(digits), fraction)
                item = QTableWidgetItem(text)
                item.setTextAlignment(Qt.AlignRight|Qt.AlignVCenter)
                if sign and self.format["rednegatives"]:
                    item.setBackgroundColor(Qt.red)
                self.table.setItem(y, x, item)


    def setNumberFormat1(self):
        dialog = numberformatdlg1.NumberFormatDlg(self.format, self)
        if dialog.exec_():
            self.format = dialog.numberFormat()
            self.refreshTable()


    def setNumberFormat2(self):
        dialog = numberformatdlg2.NumberFormatDlg(self.format, self)
        self.connect(dialog, SIGNAL("changed"), self.refreshTable)
        dialog.show()


    def setNumberFormat3(self):
        if self.numberFormatDlg is None:
            self.numberFormatDlg = numberformatdlg3.NumberFormatDlg(
                    self.format, self.refreshTable, self)
        self.numberFormatDlg.show()
        self.numberFormatDlg.raise_()
        self.numberFormatDlg.activateWindow()


app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

===================================================================

numberformatdlg1.py

====================================================================

from PyQt4.QtCore import *
from PyQt4.QtGui import *


class NumberFormatDlg(QDialog):

    def __init__(self, format, parent=None):
        super(NumberFormatDlg, self).__init__(parent)

        thousandsLabel = QLabel("&Thousands separator")
        self.thousandsEdit = QLineEdit(format["thousandsseparator"])
        thousandsLabel.setBuddy(self.thousandsEdit)
        decimalMarkerLabel = QLabel("Decimal &marker")
        self.decimalMarkerEdit = QLineEdit(format["decimalmarker"])
        decimalMarkerLabel.setBuddy(self.decimalMarkerEdit)
        decimalPlacesLabel = QLabel("&Decimal places")
        self.decimalPlacesSpinBox = QSpinBox()
        decimalPlacesLabel.setBuddy(self.decimalPlacesSpinBox)
        self.decimalPlacesSpinBox.setRange(0, 6)
        self.decimalPlacesSpinBox.setValue(format["decimalplaces"])
        self.redNegativesCheckBox = QCheckBox("&Red negative numbers")
        self.redNegativesCheckBox.setChecked(format["rednegatives"])

        buttonBox = QDialogButtonBox(QDialogButtonBox.Ok|
                                     QDialogButtonBox.Cancel)

        self.format = format.copy()

        grid = QGridLayout()
        grid.addWidget(thousandsLabel, 0, 0)
        grid.addWidget(self.thousandsEdit, 0, 1)
        grid.addWidget(decimalMarkerLabel, 1, 0)
        grid.addWidget(self.decimalMarkerEdit, 1, 1)
        grid.addWidget(decimalPlacesLabel, 2, 0)
        grid.addWidget(self.decimalPlacesSpinBox, 2, 1)
        grid.addWidget(self.redNegativesCheckBox, 3, 0, 1, 2)
        grid.addWidget(buttonBox, 4, 0, 1, 2)
        self.setLayout(grid)

        self.connect(buttonBox, SIGNAL("accepted()"),
                     self, SLOT("accept()"))
        self.connect(buttonBox, SIGNAL("rejected()"),
                     self, SLOT("reject()"))
        self.setWindowTitle("Set Number Format (Modal)")


    def accept(self):
        class ThousandsError(Exception): pass
        class DecimalError(Exception): pass
        Punctuation = frozenset(" ,;:.")

        thousands = unicode(self.thousandsEdit.text())
        decimal = unicode(self.decimalMarkerEdit.text())
        try:
            if len(decimal) == 0:
                raise DecimalError, ("The decimal marker may not be "
                                     "empty.")
            if len(thousands) > 1:
                raise ThousandsError, ("The thousands separator may "
                                    "only be empty or one character.")
            if len(decimal) > 1:
                raise DecimalError, ("The decimal marker must be "
                                     "one character.")
            if thousands == decimal:
                raise ThousandsError, ("The thousands separator and "
                              "the decimal marker must be different.")
            if thousands and thousands not in Punctuation:
                raise ThousandsError, ("The thousands separator must "
                                       "be a punctuation symbol.")
            if decimal not in Punctuation:
                raise DecimalError, ("The decimal marker must be a "
                                     "punctuation symbol.")
        except ThousandsError, e:
            QMessageBox.warning(self, "Thousands Separator Error",
                                unicode(e))
            self.thousandsEdit.selectAll()
            self.thousandsEdit.setFocus()
            return
        except DecimalError, e:
            QMessageBox.warning(self, "Decimal Marker Error",
                                unicode(e))
            self.decimalMarkerEdit.selectAll()
            self.decimalMarkerEdit.setFocus()
            return

        self.format["thousandsseparator"] = thousands
        self.format["decimalmarker"] = decimal
        self.format["decimalplaces"] = \
                self.decimalPlacesSpinBox.value()
        self.format["rednegatives"] = \
                self.redNegativesCheckBox.isChecked()
        QDialog.accept(self)


    def numberFormat(self):
        return self.format

==============================================================

numberformatdlg2.py

======================================================================

from PyQt4.QtCore import *
from PyQt4.QtGui import *


class NumberFormatDlg(QDialog):

    def __init__(self, format, parent=None):
        super(NumberFormatDlg, self).__init__(parent)
        self.setAttribute(Qt.WA_DeleteOnClose)

        punctuationRe = QRegExp(r"[ ,;:.]")

        thousandsLabel = QLabel("&Thousands separator")
        self.thousandsEdit = QLineEdit(format["thousandsseparator"])
        thousandsLabel.setBuddy(self.thousandsEdit)
        self.thousandsEdit.setMaxLength(1)
        self.thousandsEdit.setValidator(
                QRegExpValidator(punctuationRe, self))

        decimalMarkerLabel = QLabel("Decimal &marker")
        self.decimalMarkerEdit = QLineEdit(format["decimalmarker"])
        decimalMarkerLabel.setBuddy(self.decimalMarkerEdit)
        self.decimalMarkerEdit.setMaxLength(1)
        self.decimalMarkerEdit.setValidator(
                QRegExpValidator(punctuationRe, self))
        self.decimalMarkerEdit.setInputMask("X")

        decimalPlacesLabel = QLabel("&Decimal places")
        self.decimalPlacesSpinBox = QSpinBox()
        decimalPlacesLabel.setBuddy(self.decimalPlacesSpinBox)
        self.decimalPlacesSpinBox.setRange(0, 6)
        self.decimalPlacesSpinBox.setValue(format["decimalplaces"])

        self.redNegativesCheckBox = QCheckBox("&Red negative numbers")
        self.redNegativesCheckBox.setChecked(format["rednegatives"])

        buttonBox = QDialogButtonBox(QDialogButtonBox.Apply|
                                     QDialogButtonBox.Close)

        self.format = format

        grid = QGridLayout()
        grid.addWidget(thousandsLabel, 0, 0)
        grid.addWidget(self.thousandsEdit, 0, 1)
        grid.addWidget(decimalMarkerLabel, 1, 0)
        grid.addWidget(self.decimalMarkerEdit, 1, 1)
        grid.addWidget(decimalPlacesLabel, 2, 0)
        grid.addWidget(self.decimalPlacesSpinBox, 2, 1)
        grid.addWidget(self.redNegativesCheckBox, 3, 0, 1, 2)
        grid.addWidget(buttonBox, 4, 0, 1, 2)
        self.setLayout(grid)

        self.connect(buttonBox.button(QDialogButtonBox.Apply),
                     SIGNAL("clicked()"), self.apply)
        self.connect(buttonBox, SIGNAL("rejected()"),
                     self, SLOT("reject()"))
        self.setWindowTitle("Set Number Format (Modeless)")


    def apply(self):
        thousands = unicode(self.thousandsEdit.text())
        decimal = unicode(self.decimalMarkerEdit.text())
        if thousands == decimal:
            QMessageBox.warning(self, "Format Error",
                    "The thousands separator and the decimal marker "
                    "must be different.")
            self.thousandsEdit.selectAll()
            self.thousandsEdit.setFocus()
            return
        if len(decimal) == 0:
            QMessageBox.warning(self, "Format Error",
                                "The decimal marker may not be empty.")
            self.decimalMarkerEdit.selectAll()
            self.decimalMarkerEdit.setFocus()
            return

        self.format["thousandsseparator"] = thousands
        self.format["decimalmarker"] = decimal
        self.format["decimalplaces"] = \
                self.decimalPlacesSpinBox.value()
        self.format["rednegatives"] = \
                self.redNegativesCheckBox.isChecked()
        self.emit(SIGNAL("changed"))

============================================================
numberformatdlg3.py

================================================================

from PyQt4.QtCore import *
from PyQt4.QtGui import *


class NumberFormatDlg(QDialog):

    def __init__(self, format, callback, parent=None):
        super(NumberFormatDlg, self).__init__(parent)

        punctuationRe = QRegExp(r"[ ,;:.]")
        thousandsLabel = QLabel("&Thousands separator")
        self.thousandsEdit = QLineEdit(format["thousandsseparator"])
        thousandsLabel.setBuddy(self.thousandsEdit)
        self.thousandsEdit.setMaxLength(1)
        self.thousandsEdit.setValidator(
                QRegExpValidator(punctuationRe, self))
        decimalMarkerLabel = QLabel("Decimal &marker")
        self.decimalMarkerEdit = QLineEdit(format["decimalmarker"])
        decimalMarkerLabel.setBuddy(self.decimalMarkerEdit)
        self.decimalMarkerEdit.setMaxLength(1)
        self.decimalMarkerEdit.setValidator(
                QRegExpValidator(punctuationRe, self))
        self.decimalMarkerEdit.setInputMask("X")
        decimalPlacesLabel = QLabel("&Decimal places")
        self.decimalPlacesSpinBox = QSpinBox()
        decimalPlacesLabel.setBuddy(self.decimalPlacesSpinBox)
        self.decimalPlacesSpinBox.setRange(0, 6)
        self.decimalPlacesSpinBox.setValue(format["decimalplaces"])
        self.redNegativesCheckBox = QCheckBox("&Red negative numbers")
        self.redNegativesCheckBox.setChecked(format["rednegatives"])

        self.format = format
        self.callback = callback

        grid = QGridLayout()
        grid.addWidget(thousandsLabel, 0, 0)
        grid.addWidget(self.thousandsEdit, 0, 1)
        grid.addWidget(decimalMarkerLabel, 1, 0)
        grid.addWidget(self.decimalMarkerEdit, 1, 1)
        grid.addWidget(decimalPlacesLabel, 2, 0)
        grid.addWidget(self.decimalPlacesSpinBox, 2, 1)
        grid.addWidget(self.redNegativesCheckBox, 3, 0, 1, 2)
        self.setLayout(grid)

        self.connect(self.thousandsEdit,
                     SIGNAL("textEdited(QString)"), self.checkAndFix)
        self.connect(self.decimalMarkerEdit,
                     SIGNAL("textEdited(QString)"), self.checkAndFix)
        self.connect(self.decimalPlacesSpinBox,
                     SIGNAL("valueChanged(int)"), self.apply)
        self.connect(self.redNegativesCheckBox,
                     SIGNAL("toggled(bool)"), self.apply)
        self.setWindowTitle("Set Number Format (`Live')")


    def checkAndFix(self):
        thousands = unicode(self.thousandsEdit.text())
        decimal = unicode(self.decimalMarkerEdit.text())
        if thousands == decimal:
            self.thousandsEdit.clear()
            self.thousandsEdit.setFocus()
        if len(decimal) == 0:
            self.decimalMarkerEdit.setText(".")
            self.decimalMarkerEdit.selectAll()
            self.decimalMarkerEdit.setFocus()
        self.apply()


    def apply(self):
        self.format["thousandsseparator"] = \
                unicode(self.thousandsEdit.text())
        self.format["decimalmarker"] = \
                unicode(self.decimalMarkerEdit.text())
        self.format["decimalplaces"] = \
                self.decimalPlacesSpinBox.value()
        self.format["rednegatives"] = \
                self.redNegativesCheckBox.isChecked()
        self.callback()


========================================================

离线wps2000

只看该作者 1楼 发表于: 2016-10-20
改后的代码:
numbers.pyw

===============================================================================
import math
import random
import string
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import numberformatdlg1
import numberformatdlg2
import numberformatdlg3


class Form(QDialog):

    X_MAX = 26
    Y_MAX = 60

    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.numberFormatDlg = None
        self.format = dict(thousandsseparator=",",
                           decimalmarker=".", decimalplaces=2,
                           rednegatives=False)
        self.numbers = {}
        for x in range(self.X_MAX):
            for y in range(self.Y_MAX):
                self.numbers[(x, y)] = (10000 * random.random()) - 5000

        self.table = QTableWidget()
        formatButton1 = QPushButton("Set Number Format... "
                                    "(&Modal)")

        formatButton2 = QPushButton("Set Number Format... "
                                    "(Modele&ss)")

        formatButton3 = QPushButton("Set Number Format... "
                                    "(`&Live')")

        buttonLayout = QHBoxLayout()
        buttonLayout.addStretch()
        buttonLayout.addWidget(formatButton1)
        buttonLayout.addWidget(formatButton2)
        buttonLayout.addWidget(formatButton3)
        layout = QVBoxLayout()
        layout.addWidget(self.table)
        layout.addLayout(buttonLayout)
        self.setLayout(layout)
        formatButton1.clicked.connect(self.setNumberFormat1)
        formatButton2.clicked.connect(self.setNumberFormat2)
        formatButton3.clicked.connect(self.setNumberFormat3)
        self.setWindowTitle("Numbers")
        self.refreshTable()


    def refreshTable(self):
        self.table.clear()
        self.table.setColumnCount(self.X_MAX)
        self.table.setRowCount(self.Y_MAX)
        self.table.setHorizontalHeaderLabels(
                list(string.ascii_uppercase))#设置表头, list(string.ascii_uppercase)表示将引入的string模块的从A到Z的字母作为列表,设置成表头
        for x in range(self.X_MAX):
            for y in range(self.Y_MAX):
                fraction, whole = math.modf(self.numbers[(x, y)])#modf() 方法返回整数部分与小数部分,两部分的数值符号与x相同,整数部分以浮点型表示。
                sign = "-" if whole < 0 else ""
                whole = "%d" % math.floor(abs(whole))# "%d" % 表示对数字进行格式化,得到的是一个十进制整数的字符串
                digits = []
                for i, digit in enumerate(reversed(whole)):#reversed()函数是返回序列seq的反向访问的迭代子,enumerate可以同时获得索引和值
                    if i and i % 3 == 0:
                        digits.insert(0, self.format["thousandsseparator"])
                    digits.insert(0, digit)
                if self.format["decimalplaces"]:
                    fraction = "%0.7f" % abs(fraction)
                    fraction = (self.format["decimalmarker"] +
                                fraction[2:self.format["decimalplaces"]
                                + 2])
                else:
                    fraction = ""
                text = "%s%s%s" % (sign, "".join(digits), fraction)
                item = QTableWidgetItem(text)
                item.setTextAlignment(Qt.AlignRight|Qt.AlignVCenter)
                if sign and self.format["rednegatives"]:
                    item.setBackground(Qt.red)#setBackgroundColor已变成了setBackground
                self.table.setItem(y, x, item)



    def setNumberFormat1(self):
        dialog = numberformatdlg1.NumberFormatDlg(self.format, self)
        if dialog.exec_():
            self.format = dialog.numberFormat()
            self.refreshTable()


    def setNumberFormat2(self):
        dialog = numberformatdlg2.NumberFormatDlg(self.format, self)
        #self.connect(dialog, SIGNAL("changed"), self.refreshTable)
        dialog.changed.connect(self.refreshTable)
        dialog.show()


    def setNumberFormat3(self):
        if self.numberFormatDlg is None:
            self.numberFormatDlg = numberformatdlg3.NumberFormatDlg(
                    self.format, self.refreshTable, self)
        self.numberFormatDlg.show()
        self.numberFormatDlg.raise_()
        self.numberFormatDlg.activateWindow()



app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

=================================================================
numberformatdlg1.py
==================================================================

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


class NumberFormatDlg(QDialog):

    def __init__(self, format, parent=None):
        super(NumberFormatDlg, self).__init__(parent)

        thousandsLabel = QLabel("&Thousands separator")
        self.thousandsEdit = QLineEdit(format["thousandsseparator"])
        thousandsLabel.setBuddy(self.thousandsEdit)#setBuddy 函数的作用,是将Alt + 带$符号的字符串的首字母作为快捷键
        decimalMarkerLabel = QLabel("Decimal &marker")
        self.decimalMarkerEdit = QLineEdit(format["decimalmarker"])
        decimalMarkerLabel.setBuddy(self.decimalMarkerEdit)
        decimalPlacesLabel = QLabel("&Decimal places")
        self.decimalPlacesSpinBox = QSpinBox()
        decimalPlacesLabel.setBuddy(self.decimalPlacesSpinBox)
        self.decimalPlacesSpinBox.setRange(0, 6)
        self.decimalPlacesSpinBox.setValue(format["decimalplaces"])
        self.redNegativesCheckBox = QCheckBox("&Red negative numbers")
        self.redNegativesCheckBox.setChecked(format["rednegatives"])

        buttonBox = QDialogButtonBox(QDialogButtonBox.Ok|
                                     QDialogButtonBox.Cancel)

        self.format = format.copy()#执行浅拷贝操作

        grid = QGridLayout()
        grid.addWidget(thousandsLabel, 0, 0)
        grid.addWidget(self.thousandsEdit, 0, 1)
        grid.addWidget(decimalMarkerLabel, 1, 0)
        grid.addWidget(self.decimalMarkerEdit, 1, 1)
        grid.addWidget(decimalPlacesLabel, 2, 0)
        grid.addWidget(self.decimalPlacesSpinBox, 2, 1)
        grid.addWidget(self.redNegativesCheckBox, 3, 0, 1, 2)
        grid.addWidget(buttonBox, 4, 0, 1, 2)
        self.setLayout(grid)

        buttonBox.accepted.connect(self.accept)
        buttonBox.rejected.connect(self.reject)
        self.setWindowTitle("Set Number Format (Modal)")



    def accept(self):
        class ThousandsError(Exception): pass
        class DecimalError(Exception): pass
        Punctuation = frozenset(" ,;:.")

        thousands = self.thousandsEdit.text()
        decimal = self.decimalMarkerEdit.text()
        try:
            if len(decimal) == 0:
                raise DecimalError  ("The decimal marker may not be "
                                     "empty.")
            if len(thousands) > 1:
                raise ThousandsError  ("The thousands separator may "
                                    "only be empty or one character.")
            if len(decimal) > 1:
                raise DecimalError  ("The decimal marker must be "
                                     "one character.")
            if thousands == decimal:
                raise ThousandsError  ("The thousands separator and "
                              "the decimal marker must be different.")
            if thousands and thousands not in Punctuation:
                raise ThousandsError  ("The thousands separator must "
                                       "be a punctuation symbol.")
            if decimal not in Punctuation:
                raise DecimalError  ("The decimal marker must be a "
                                     "punctuation symbol.")
        except ThousandsError as e:
            QMessageBox.warning(self, "Thousands Separator Error",
                                str(e))#原来的代码是用unicode()完成这一工作,现在要改为用str()
            self.thousandsEdit.selectAll()
            self.thousandsEdit.setFocus()
            return
        except DecimalError as e:
            QMessageBox.warning(self, "Decimal Marker Error",str(e))
            self.decimalMarkerEdit.selectAll()
            self.decimalMarkerEdit.setFocus()
            return

        self.format["thousandsseparator"] = thousands
        self.format["decimalmarker"] = decimal
        self.format["decimalplaces"] = \
                self.decimalPlacesSpinBox.value()
        self.format["rednegatives"] = \
                self.redNegativesCheckBox.isChecked()
        QDialog.accept(self)


    def numberFormat(self):
        return self.format

=====================================================================

numberformatdlg2.py

=====================================================================

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


class NumberFormatDlg(QDialog):

    def __init__(self, format, parent=None):
        super(NumberFormatDlg, self).__init__(parent)
        self.setAttribute(Qt.WA_DeleteOnClose)#如果widget设置了Qt.WA_DeleteOnClose属性,widget将会被释放。不管widget是否可见,关闭事件都会传递给widget。即接收到QCloseEvent事件后,除了调用hide()方法将窗口隐藏,同时会调用deleteLater()方法将窗口释放掉,不会再占用资源。

        punctuationRe = QRegExp(r"[ ,;:.]")

        thousandsLabel = QLabel("&Thousands separator")
        self.thousandsEdit = QLineEdit(format["thousandsseparator"])
        thousandsLabel.setBuddy(self.thousandsEdit)
        self.thousandsEdit.setMaxLength(1)
        self.thousandsEdit.setValidator(
                QRegExpValidator(punctuationRe, self))

        decimalMarkerLabel = QLabel("Decimal &marker")
        self.decimalMarkerEdit = QLineEdit(format["decimalmarker"])
        decimalMarkerLabel.setBuddy(self.decimalMarkerEdit)
        self.decimalMarkerEdit.setMaxLength(1)
        self.decimalMarkerEdit.setValidator(
                QRegExpValidator(punctuationRe, self))
        self.decimalMarkerEdit.setInputMask("X")

        decimalPlacesLabel = QLabel("&Decimal places")
        self.decimalPlacesSpinBox = QSpinBox()
        decimalPlacesLabel.setBuddy(self.decimalPlacesSpinBox)
        self.decimalPlacesSpinBox.setRange(0, 6)
        self.decimalPlacesSpinBox.setValue(format["decimalplaces"])

        self.redNegativesCheckBox = QCheckBox("&Red negative numbers")
        self.redNegativesCheckBox.setChecked(format["rednegatives"])

        buttonBox = QDialogButtonBox(QDialogButtonBox.Apply|
                                     QDialogButtonBox.Close)

        self.format = format

        grid = QGridLayout()
        grid.addWidget(thousandsLabel, 0, 0)
        grid.addWidget(self.thousandsEdit, 0, 1)
        grid.addWidget(decimalMarkerLabel, 1, 0)
        grid.addWidget(self.decimalMarkerEdit, 1, 1)
        grid.addWidget(decimalPlacesLabel, 2, 0)
        grid.addWidget(self.decimalPlacesSpinBox, 2, 1)
        grid.addWidget(self.redNegativesCheckBox, 3, 0, 1, 2)
        grid.addWidget(buttonBox, 4, 0, 1, 2)
        self.setLayout(grid)

        buttonBox.button(QDialogButtonBox.Apply).clicked.connect(self.apply)
        buttonBox.rejected.connect(self.reject)
        self.setWindowTitle("Set Number Format (Modeless)")

    changed = pyqtSignal(int)

    def apply(self):
        thousands = self.thousandsEdit.text()
        decimal = self.decimalMarkerEdit.text()
        if thousands == decimal:
            QMessageBox.warning(self, "Format Error",
                    "The thousands separator and the decimal marker "
                    "must be different.")
            self.thousandsEdit.selectAll()
            self.thousandsEdit.setFocus()
            return
        if len(decimal) == 0:
            QMessageBox.warning(self, "Format Error",
                                "The decimal marker may not be empty.")
            self.decimalMarkerEdit.selectAll()
            self.decimalMarkerEdit.setFocus()
            return

        self.format["thousandsseparator"] = thousands
        self.format["decimalmarker"] = decimal
        self.format["decimalplaces"] = \
                self.decimalPlacesSpinBox.value()
        self.format["rednegatives"] = \
                self.redNegativesCheckBox.isChecked()

        self.changed.emit(self)#self.emit(SIGNAL("changed"))改成self.changed.emit(self)

==========================================================================

numberformatdlg3.py

==========================================================================


from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


class NumberFormatDlg(QDialog):

    def __init__(self, format, callback, parent=None):
        super(NumberFormatDlg, self).__init__(parent)

        punctuationRe = QRegExp(r"[ ,;:.]")
        thousandsLabel = QLabel("&Thousands separator")
        self.thousandsEdit = QLineEdit(format["thousandsseparator"])
        thousandsLabel.setBuddy(self.thousandsEdit)
        self.thousandsEdit.setMaxLength(1)
        self.thousandsEdit.setValidator(
                QRegExpValidator(punctuationRe, self))
        decimalMarkerLabel = QLabel("Decimal &marker")
        self.decimalMarkerEdit = QLineEdit(format["decimalmarker"])
        decimalMarkerLabel.setBuddy(self.decimalMarkerEdit)
        self.decimalMarkerEdit.setMaxLength(1)
        self.decimalMarkerEdit.setValidator(
                QRegExpValidator(punctuationRe, self))
        self.decimalMarkerEdit.setInputMask("X")
        decimalPlacesLabel = QLabel("&Decimal places")
        self.decimalPlacesSpinBox = QSpinBox()
        decimalPlacesLabel.setBuddy(self.decimalPlacesSpinBox)
        self.decimalPlacesSpinBox.setRange(0, 6)
        self.decimalPlacesSpinBox.setValue(format["decimalplaces"])
        self.redNegativesCheckBox = QCheckBox("&Red negative numbers")
        self.redNegativesCheckBox.setChecked(format["rednegatives"])

        self.format = format
        self.callback = callback

        grid = QGridLayout()
        grid.addWidget(thousandsLabel, 0, 0)
        grid.addWidget(self.thousandsEdit, 0, 1)
        grid.addWidget(decimalMarkerLabel, 1, 0)
        grid.addWidget(self.decimalMarkerEdit, 1, 1)
        grid.addWidget(decimalPlacesLabel, 2, 0)
        grid.addWidget(self.decimalPlacesSpinBox, 2, 1)
        grid.addWidget(self.redNegativesCheckBox, 3, 0, 1, 2)
        self.setLayout(grid)
        self.thousandsEdit.textEdited.connect(self.checkAndFix)
        self.decimalMarkerEdit.textEdited.connect(self.checkAndFix)
        self.redNegativesCheckBox.toggled.connect(self.apply)
        self.setWindowTitle("Set Number Format (`Live')")


    def checkAndFix(self):
        thousands = self.thousandsEdit.text()
        decimal = self.decimalMarkerEdit.text()
        if thousands == decimal:
            self.thousandsEdit.clear()
            self.thousandsEdit.setFocus()
        if len(decimal) == 0:
            self.decimalMarkerEdit.setText(".")
            self.decimalMarkerEdit.selectAll()
            self.decimalMarkerEdit.setFocus()
        self.apply()


    def apply(self):
        self.format["thousandsseparator"] = \
                self.thousandsEdit.text()
        self.format["decimalmarker"] = \
                self.decimalMarkerEdit.text()
        self.format["decimalplaces"] = \
                self.decimalPlacesSpinBox.value()
        self.format["rednegatives"] = \
                self.redNegativesCheckBox.isChecked()
        self.callback()






离线wps2000

只看该作者 2楼 发表于: 2016-10-20
这些代码值得一读,如果都搞通了,这本书也算没白学。
离线tonghb

只看该作者 3楼 发表于: 2016-10-28
很受益,感谢付出,同时对6章问题很大,如果能够把它改成pyqt5就好了。
离线wps2000

只看该作者 4楼 发表于: 2016-11-06
回 tonghb 的帖子
tonghb:很受益,感谢付出,同时对6章问题很大,如果能够把它改成pyqt5就好了。[表情]  (2016-10-28 13:32) 

最近比较忙,还没来得及看第6章。一起学习。
离线fan20113072

只看该作者 5楼 发表于: 2016-12-05
def setNumberFormat2(self):
        dialog = numberformatdlg2.NumberFormatDlg(self.format, self)
        #self.connect(dialog, SIGNAL("changed"), self.refreshTable)
        dialog.changed.connect(self.refreshTable)
        dialog.show()
有问题,NumberFormatDlg中没有changed
离线fan20113072

只看该作者 6楼 发表于: 2016-12-05
回 tonghb 的帖子
tonghb:很受益,感谢付出,同时对6章问题很大,如果能够把它改成pyqt5就好了。[表情]  (2016-10-28 13:32) 

def setNumberFormat2(self):
        dialog = numberformatdlg2.NumberFormatDlg(self.format, self)
        #self.connect(dialog, SIGNAL("changed"), self.refreshTable)
        dialog.changed.connect(self.refreshTable)
        dialog.show()
有问题,NumberFormatDlg中没有changed
这个地方你运行没有问题吗?
离线fan20113072

只看该作者 7楼 发表于: 2016-12-05
自己的方法解决了上面的问题
numbers.pyw中
def setNumberFormat2(self):
        dialog = numberformatdlg2.NumberFormatDlg(self.format, self.refreshTable, self)
        #self.connect(dialog, SIGNAL("changed"), self.refreshTable)
        #dialog.changed.connect(self.refreshTable)
        dialog.show()
numberformatdlg2.py中
def __init__(self, format, callback, parent=None):
并加上:self.callback = callback
def apply(self):中
self.changed.emit(self)#self.emit(SIGNAL("changed"))改成self.changed.emit(self)
改为self.callback()





离线fan20113072

只看该作者 8楼 发表于: 2016-12-10
上述问题的新解决方法:
在numberformatdlg2.py中自定义changed信号
class NumberFormatDlg(QDialog):
        changed = pyqtSignal()
将self.changed.emit(self)范围self.changed.emit()
离线wps2000

只看该作者 9楼 发表于: 2017-06-16
回 fan20113072 的帖子
fan20113072:上述问题的新解决方法:
在numberformatdlg2.py中自定义changed信号
class NumberFormatDlg(QDialog):
        changed = pyqtSignal()
将self.changed.emit(self)范围self.changed.emit() (2016-12-10 10:57) 

你没有注意看我修改后的源代码,在numberformatdlg2.py,是自定义了changed这个信号的。

changed = pyqtSignal(int)
离线fengtz

只看该作者 10楼 发表于: 2018-04-23
changed = pyqtSignal(int) 是不对的,应该是changed = pyqtSignal()。
modeless版的数据是通过对form.format的引用来完成的,信号里不传数据。
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