def buttonOpenClicked(self):
fileDialog = QFileDialog(
self, "打开历史数据文件", QApplication.applicationDirPath() + "/../data", "Database File (*.db *.mdb)"
)
if fileDialog.exec_() == QDialog.Rejected:
return
# clear curve
self.curveHistory.clear()
#
filePaths = fileDialog.selectedFiles()
if filePaths.isEmpty():
return
filePath = filePaths.first()
if filePath.isEmpty():
return
# open database
if not DatabaseMgr().open(filePath):
return
#
startTime = QDateTime.fromMSecsSinceEpoch(DatabaseMgr().startTime())
endTime = QDateTime.fromMSecsSinceEpoch(DatabaseMgr().endTime())
self.dateTimeEditStart.setDateTimeRange(startTime, endTime)
self.dateTimeEditEnd.setDateTimeRange(startTime, endTime)
self.dateTimeEditEnd.setDateTime(endTime)
self.dateTimeEditStart.setDateTime(startTime)
# title of curve
self.curveHistory.setTitle("历史数据回放" + "（" + QFileInfo(filePath).fileName() + "）")
def buttonExportClicked(self):
(filePaths, filter) = QFileDialog.getOpenFileNames(
parent=self,
caption="转换数据库文件为文本格式",
directory=QApplication.applicationDirPath() + "/../data",
filter="Database file (*.db * mdb)",
)
if not filePaths:
return
#
if DatabaseMgr().convertToText(filePaths):
QMessageBox.information(self, "格式转换", "转换成功！")
else:
QMessageBox.warning(self, "格式转换", "转换失败！")