class QmyMainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent) #调用父类构造函数，创建窗体
self.ui=Ui_MainWindow() #创建UI对象
self.ui.setupUi(self) #构造UI界面
self.ui.groupBox.setEnabled(False)
self.ui.actSaveALL.setEnabled(False)
self.ui.actReadALL.setEnabled(False)
self.setWindowTitle("二进制文件流化读写")
self.__testFileName="" #测试用文件的文件名
## ==============自定义功能函数============
def __iniWrite(self): ##初始化写文件操作
self.fileDevice=QFile(self.__testFileName) #创建文件对象
if not self.fileDevice.open(QIODevice.WriteOnly):
del self.fileDevice #删除对象
return False
self.fileStream=QDataStream(self.fileDevice) #流对象
self.fileStream.setVersion(QDataStream.Qt_5_12) #设置版本号，写入和读取的版本号要兼容
if self.ui.radio_BigEndian.isChecked():
self.fileStream.setByteOrder(QDataStream.BigEndian)
else:
self.fileStream.setByteOrder(QDataStream.LittleEndian)
##必须要设置精度，float和double都按照这个精度
precision=QDataStream.DoublePrecision
if self.ui.radio_Single.isChecked():
precision=QDataStream.SinglePrecision
self.fileStream.setFloatingPointPrecision(precision)
return True
def __delFileStream(self): ##结束写文件操作
self.fileDevice.close()
del self.fileStream
del self.fileDevice
def __iniRead(self): ##开始读文件操作
if not QFile.exists(self.__testFileName):
QMessageBox.critical(self,"错误","文件不存在")
return False
self.fileDevice=QFile(self.__testFileName) #创建文件对象
if not self.fileDevice.open(QIODevice.ReadOnly):
del self.fileDevice #删除对象
return False
self.fileStream=QDataStream(self.fileDevice)
self.fileStream.setVersion(QDataStream.Qt_5_12) #设置流版本号，写入和读取的版本号要兼容
if self.ui.radio_BigEndian.isChecked():
self.fileStream.setByteOrder(QDataStream.BigEndian)
else:
self.fileStream.setByteOrder(QDataStream.LittleEndian)
##必须要设置精度，float和double都按照这个精度
precision=QDataStream.DoublePrecision
if self.ui.radio_Single.isChecked():
precision=QDataStream.SinglePrecision
self.fileStream.setFloatingPointPrecision(precision)
return True
## ==========由connectSlotsByName() 自动连接的槽函数==================
@pyqtSlot() ##选择测试用文件
def on_btnFile_clicked(self):
curPath=QDir.currentPath() #当前目录
title="选择文件" #对话框标题
filt="流数据文件(*.stream)" #文件过滤器
fileName,flt=QFileDialog.getSaveFileName(self,title,curPath,filt)
if (fileName == ""):
return
self.__testFileName=fileName #测试用文件
self.ui.editFilename.setText(fileName)
self.ui.groupBox.setEnabled(True)
self.ui.actSaveALL.setEnabled(True)
self.ui.actReadALL.setEnabled(True)
@pyqtSlot() ##写 int8
def on_btnInt8_Write_clicked(self):
Value=self.ui.spin_Int8.value() #Python int
if self.__iniWrite():
try:
self.fileStream.writeInt8(Value)
except Exception as e:
QMessageBox.critical(self, "writeInt8()出现错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 int8
def on_btnInt8_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readInt8()
self.ui.edit_Int8.setText("%d"%Value)
self.__delFileStream()
@pyqtSlot() ##写 uint8
def on_btnUInt8_Write_clicked(self):
Value=self.ui.spin_UInt8.value()
if self.__iniWrite():
try:
self.fileStream.writeUInt8(Value)
except Exception as e:
QMessageBox.critical(self, "writeUInt8()出现错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 uint8
def on_btnUInt8_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readUInt8()
self.ui.edit_UInt8.setText("%d"%Value)
self.__delFileStream()
@pyqtSlot() ##写int16
def on_btnInt16_Write_clicked(self):
Value=self.ui.spin_Int16.value() #Python的int
if self.__iniWrite():
try:
self.fileStream.writeInt16(Value) #以int16类型写入文件
except Exception as e:
QMessageBox.critical(self, "writeInt16()发生错误", str(e))
finally:
self.__delFileStream()
## print("finally被执行")
@pyqtSlot() ##读 int16
def on_btnInt16_Read_clicked(self):
if self.__iniRead():
try:
Value=self.fileStream.readInt16()
self.ui.edit_Int16.setText("%d"%Value)
except Exception as e:
QMessageBox.critical(self, "readInt16()发生错误", str(e))
finally:
self.__delFileStream()
## print("finally被执行")
@pyqtSlot() ##写 uint16
def on_btnUInt16_Write_clicked(self):
Value=self.ui.spin_UInt16.value()
if self.__iniWrite():
try:
self.fileStream.writeUInt16(Value)
except Exception as e:
QMessageBox.critical(self, "writeUInt16()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 uint16
def on_btnUIn16_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readUInt16()
self.ui.edit_UInt16.setText("%d"%Value)
self.__delFileStream()
@pyqtSlot() ##写 int32
def on_btnInt32_Write_clicked(self):
Value=self.ui.spin_Int32.value()
if self.__iniWrite():
try:
self.fileStream.writeInt32(Value)
except Exception as e:
QMessageBox.critical(self, "writeInt32()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 int32
def on_btnInt32_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readInt32()
self.ui.edit_Int32.setText("%d"%Value)
self.__delFileStream()
@pyqtSlot() ##写 int64
def on_btnInt64_Write_clicked(self):
Value=self.ui.spin_Int64.value()
if self.__iniWrite():
try:
self.fileStream.writeInt64(Value)
except Exception as e:
QMessageBox.critical(self, "writeInt64()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 int64
def on_btnInt64_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readInt64()
self.ui.edit_Int64.setText("%d"%Value)
self.__delFileStream()
@pyqtSlot() ##写 int
def on_btnInt_Write_clicked(self):
Value=self.ui.spin_Int.value()
if self.__iniWrite():
try:
self.fileStream.writeInt(Value)
except Exception as e:
QMessageBox.critical(self, "writeInt()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 int
def on_btnInt_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readInt()
self.ui.edit_Int.setText("%d"%Value)
self.__delFileStream()
@pyqtSlot() ##写 bool
def on_btnBool_Write_clicked(self):
Value=self.ui.chkBox_In.isChecked() #bool型
if self.__iniWrite():
self.fileStream.writeBool(Value)
self.__delFileStream()
@pyqtSlot() ##读 bool
def on_btnBool_Read_clicked(self):
if self.__iniRead():
Value=self.fileStream.readBool() #bool型
self.ui.chkBox_Out.setChecked(Value)
self.__delFileStream()
@pyqtSlot() ##写 float
def on_btnFloat_Write_clicked(self):
Value=self.ui.spin_Float.value()
if self.__iniWrite():
try:
self.fileStream.writeFloat(Value)
except Exception as e:
QMessageBox.critical(self, "writeFloat()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 float
def on_btnFloat_Read_clicked(self):
if self.__iniRead():
try:
Value=self.fileStream.readFloat()
self.ui.edit_Float.setText("%.4f"%Value)
except Exception as e:
QMessageBox.critical(self, "writeFloat()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##写 double
def on_btnDouble_Write_clicked(self):
Value=self.ui.spin_Double.value()
if self.__iniWrite():
try:
self.fileStream.writeDouble(Value)
except Exception as e:
QMessageBox.critical(self, "writeDouble()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 double
def on_btnDouble_Read_clicked(self):
if self.__iniRead():
try:
Value=self.fileStream.readDouble()
self.ui.edit_Double.setText("%.4f"%Value)
except Exception as e:
QMessageBox.critical(self, "readDouble()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##写 QString,与Python的str兼容
def on_btnQStr_Write_clicked(self):
Value=self.ui.editQStr_In.text()
if self.__iniWrite():
try:
self.fileStream.writeQString(Value)
except Exception as e:
QMessageBox.critical(self, "writeQString()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 QString,与Python的str兼容
def on_btnQStr_Read_clicked(self):
if self.__iniRead():
try:
Value=self.fileStream.readQString()
self.ui.editQStr_Out.setText(Value)
except Exception as e:
QMessageBox.critical(self, "readQString()发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##写 String
def on_btnStr_Write_clicked(self):
strV=self.ui.editStr_In.text() #str类型
if self.__iniWrite():
try:
bts=bytes(strV,encoding="utf-8") #转换为bytes类型
self.fileStream.writeString(bts)
except Exception as e:
QMessageBox.critical(self, "写入时发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读 String
def on_btnStr_Read_clicked(self):
if self.__iniRead():
try:
Value=self.fileStream.readString() #bytes类型
strV=Value.decode("utf-8") #从bytes类型解码为字符串，编码utf-8
self.ui.editStr_Out.setText(strV)
except Exception as e:
QMessageBox.critical(self, "读取时发生错误", str(e))
finally:
self.__delFileStream()
##===字体的写入与读取
@pyqtSlot() ##选择字体
def on_btnFont_In_clicked(self):
font=self.ui.btnFont_In.font()
font,OK=QFontDialog.getFont(font,self) #选择字体
if OK:
self.ui.btnFont_In.setFont(font)
@pyqtSlot() ##写 QVariant, QFont
def on_btnFont_Write_clicked(self):
font=self.ui.btnFont_In.font() #QFont类型
if self.__iniWrite():
self.fileStream.writeQVariant(font) #QFont类型
self.__delFileStream()
@pyqtSlot() ##读 QVariant, QFont
def on_btnFont_Read_clicked(self):
if self.__iniRead():
try:
font=self.fileStream.readQVariant() #QFont类型
self.ui.editFont_Out.setFont(font)
except Exception as e:
QMessageBox.critical(self, "读取时发生错误", str(e))
finally:
self.__delFileStream()
##===颜色的写入与读取
@pyqtSlot() ##选择颜色
def on_btnColor_In_clicked(self):
plet=self.ui.btnColor_In.palette() #QPalette
color=plet.buttonText().color() #QColor
color= QColorDialog.getColor(color,self)
if color.isValid():
plet.setColor(QPalette.ButtonText,color)
self.ui.btnColor_In.setPalette(plet)
@pyqtSlot() ##写 QVariant, QColor
def on_btnColor_Write_clicked(self):
plet=self.ui.btnColor_In.palette()
color=plet.buttonText().color() #QColor
if self.__iniWrite():
self.fileStream.writeQVariant(color) #QColor
self.__delFileStream()
@pyqtSlot() ##读 QVariant, QColor
def on_btnColor_Read_clicked(self):
if self.__iniRead():
try:
color=self.fileStream.readQVariant() #读取为QColor类型
plet=self.ui.editColor_Out.palette()
plet.setColor(QPalette.Text,color)
self.ui.editColor_Out.setPalette(plet)
except Exception as e:
QMessageBox.critical(self, "读取时发生错误", str(e))
finally:
self.__delFileStream()
@pyqtSlot() ##读出编辑框全清空
def on_actClearOutput_triggered(self):
self.ui.edit_Int8.clear()
self.ui.edit_UInt8.clear()
self.ui.edit_Int16.clear()
self.ui.edit_UInt16.clear()
self.ui.edit_Int32.clear()
self.ui.edit_Int64.clear()
self.ui.edit_Int.clear()
self.ui.edit_Float.clear()
self.ui.edit_Double.clear()
font=self.font()
self.ui.editFont_Out.setFont(font)
plet=self.palette()
self.ui.editColor_Out.setPalette(plet)
@pyqtSlot() ##连续写入文件
def on_actSaveALL_triggered(self):
if not self.__iniWrite():
QMessageBox.critical(self,"错误","为写入打开文件时出错")
return
#数据写入部分
Value=self.ui.spin_Int8.value()
self.fileStream.writeInt8(Value) #int8
Value=self.ui.spin_UInt8.value()
self.fileStream.writeUInt8(Value) #uint8
Value=self.ui.spin_Int16.value()
self.fileStream.writeInt16(Value) #int16
Value=self.ui.spin_UInt16.value()
self.fileStream.writeUInt16(Value) #uint16
Value=self.ui.spin_Int32.value()
self.fileStream.writeInt32(Value) #int32
Value=self.ui.spin_Int64.value()
self.fileStream.writeInt64(Value) #int64
Value=self.ui.spin_Int.value()
self.fileStream.writeInt(Value) #int
Value=self.ui.chkBox_In.isChecked()
self.fileStream.writeBool(Value) #bool
Value=self.ui.spin_Float.value()
self.fileStream.writeFloat(Value) #float
Value=self.ui.spin_Double.value()
self.fileStream.writeDouble(Value) #double
str_Value=self.ui.editQStr_In.text()
self.fileStream.writeQString(str_Value) #QString
str_Value=self.ui.editStr_In.text() #str类型
bts=bytes(str_Value,encoding="utf-8") #转换为bytes类型
self.fileStream.writeString(bts)
font=self.ui.btnFont_In.font()
self.fileStream.writeQVariant(font) #QFont
plet=self.ui.btnColor_In.palette()
color=plet.buttonText().color()
self.fileStream.writeQVariant(color) #QColor
#数据写入完成
self.__delFileStream()
QMessageBox.information(self,"消息","数据连续写入完成.")
@pyqtSlot() ##连续读取文件
def on_actReadALL_triggered(self):
if not self.__iniRead():
QMessageBox.critical(self,"错误","为读取打开文件时出错")
return
#数据读取部分
Value=self.fileStream.readInt8() #int8
self.ui.edit_Int8.setText("%d"%Value)
Value=self.fileStream.readUInt8() #uint8
self.ui.edit_UInt8.setText("%d"%Value)
Value=self.fileStream.readInt16() #int16
self.ui.edit_Int16.setText("%d"%Value)
Value=self.fileStream.readUInt16() #uint16
self.ui.edit_UInt16.setText("%d"%Value)
Value=self.fileStream.readInt32() #int32
self.ui.edit_Int32.setText("%d"%Value)
Value=self.fileStream.readInt64() #int64
self.ui.edit_Int64.setText("%d"%Value)
Value=self.fileStream.readInt() #int
self.ui.edit_Int.setText("%d"%Value)
Value=self.fileStream.readBool() #bool
self.ui.chkBox_Out.setChecked(Value)
Value=self.fileStream.readFloat() #float
self.ui.edit_Float.setText("%.4f"%Value)
Value=self.fileStream.readDouble() #double
self.ui.edit_Double.setText("%.4f"%Value)
str_Value=self.fileStream.readQString() #str
self.ui.editQStr_Out.setText(str_Value)
byteStr=self.fileStream.readString() #bytes
str_Value=byteStr.decode("utf-8") #从bytes类型解码为字符串
self.ui.editStr_Out.setText(str_Value)
font=self.fileStream.readQVariant() #QFont
self.ui.editFont_Out.setFont(font)
color=self.fileStream.readQVariant() #QColor
plet=self.ui.editColor_Out.palette()
plet.setColor(QPalette.Text,color)
self.ui.editColor_Out.setPalette(plet)
#数据写入完成
self.__delFileStream()
QMessageBox.information(self,"消息","数据连续读取完成.")
