如何在python中从QLineEdit中读出文本? [英] How to read out the text from QLineEdit in python?
问题描述
我为我的插件创建了一个带有 3 个按钮的启动 GUI.这非常有效，如果我单击其中一个按钮，则会启动特定操作.到目前为止，这是有效的.如果我单击其中一个按钮，则会出现一个带有确定"和取消"两个按钮的新 GUI，并且会出现一个 lineedit.如果我按下取消，GUI 将关闭，如果我按下确定，我希望程序从编辑行读取文本并将其存储在变量中.到目前为止，这不起作用.
I have created for my plugin a start GUI with 3 buttons. This works very well and if I click on one of the buttons a specific action is started. So far this works. If I click on one of the buttons a new GUI with two buttons "ok" and "cancel" and a lineedit appears. If I push on cancel the GUI will be closed, if I push on ok, I want the program to read the text from the editline and store it in a variable. This doesnßt work so far.
这是包含对话框的类:
from PyQt4.QtCore import pyqtSlot
from PyQt4.QtGui import QDialog, QLineEdit
from ui_grz import Ui_Dialog
class grzDialog(QDialog):
def __init__(self):
QDialog.__init__(self)
# Set up the user interface from Designer.
self.ui = Ui_Dialog()
self.ui.setupUi(self)
这是在使用 QT Designer 和命令 pyuic4 创建 GUI 后包含 GUI 结构的类:
This is the class that contians the structure of the GUI after creating the GUI with QT Designer and the command pyuic4:
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(387, 153)
self.buttonBox = QtGui.QDialogButtonBox(Dialog)
self.buttonBox.setGeometry(QtCore.QRect(30, 110, 341, 32))
self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
self.buttonBox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
self.buttonBox.setObjectName(_fromUtf8("buttonBox"))
self.label = QtGui.QLabel(Dialog)
self.label.setGeometry(QtCore.QRect(10, 10, 361, 51))
self.label.setObjectName(_fromUtf8("label"))
self.lineEdit = QtGui.QLineEdit(Dialog)
self.lineEdit.setGeometry(QtCore.QRect(10, 60, 351, 31))
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.retranslateUi(Dialog)
QtCore.QObject.connect(self.buttonBox, QtCore.SIGNAL(_fromUtf8("accepted()")), Dialog.accept)
QtCore.QObject.connect(self.buttonBox, QtCore.SIGNAL(_fromUtf8("rejected()")), Dialog.reject)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(QtGui.QApplication.translate("Dialog", "GRZ Analyse", None, QtGui.QApplication.UnicodeUTF8))
self.label.setText(QtGui.QApplication.translate("Dialog", "<html><head/><body><p><span style=\" font-weight:600;\">Bitte geben Sie hier den Schwellenwert für die GRZ-Analyse ein:</span></p><p>Bitte achten Sie auf eine korrekte Schreibweise (bspw. 2.5):</p></body></html>", None, QtGui.QApplication.UnicodeUTF8))
在这个类中我需要变量:
And in this class I need the variable:
# Import the PyQt and QGIS libraries
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
# Import the code for the dialog
from ubgrzdialog import grzDialog
class quickAnalysis:
def __init__(self, iface):
# Save reference to the QGIS interface
self.iface = iface
def grzAnalysis(self):
dlg = grzDialog()
dlg.show()
result = dlg.exec_()
if result == 1:
text = dlg.text()
QMessageBox.information(self.iface.mainWindow(),"test", "%s" %(text), QMessageBox.Ok)
这只是课程的一小部分，但这是我对如何从 LineEdit 小部件读取文本有疑问的部分.
This is only one short part of the class, but this is the part where I have the question how to read the text from the LineEdit widget.
您有什么想法或建议吗?
Do you have any ideas or suggestions?
如果这是一个双重帖子，谢谢和抱歉，但我还没有找到适合我的问题的答案.
Thanks and sorry if this is a double post, but I haven´t found an appropriate answer for my problem.
推荐答案
如文档，QLineEdit 的文本可以通过它的方法text 检索.
As mentioned in the documentation, the text of a QLineEdit can be retrieved with its method text.
text = dlg.ui.lineEdit.text()
请注意，它是一个 QString，而不是常规字符串，但这应该不是问题，因为您使用 "%s" % text 对其进行格式化.
Note that it's a QString, not a regular string, but that shouldn't be a problem as you format it with your "%s" % text.
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