qtextedit settext/setmarkdown not updating
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Dear all,
Once again, I'm stuck and would like to ask for your advice concerning an issue with qtextedit.
I have a qtextedit widget and can at initialization write text A to it with settext (or setMarkdown at 5.14). So far this works nicely.
Next to the qtextedit, I have a Qtreeview filled by QfilesystemModel. When the user selects a new file B, I want the qtextedit to be updated. The connection to the selectionchanged event works and settext is called on the qtextedit.
The problem: The text is not updated. Only if I select yet another file "C", the previous selected file (B) is shown.
I found online some pages mentioninga similar issue claiming to use qthreads (which does not match my usecase) or to call qapplication.processevents, which does not help either...Any clues?
Any hints are apprechiated!Ulrich
python on windows 10 qt5.14
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@hermes said in qtextedit settext/setmarkdown not updating:
event works and settext is called on the qtextedit.
How? Please show us some code.
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Sorry,... the basic mistake...
It's ugly, but only my start...to execute it:
python.exe .\mynotes.py ..\test-file\ test.md
where
mynnotes.py is the file with the following code.
..\test-file\ is a folder with markdown or textfiles
test.md is the first file it should show.import sys, os, re from PyQt5.QtWidgets import QApplication, QFileSystemModel, QTreeView, QWidget, QVBoxLayout, QHBoxLayout, QMainWindow from PyQt5.QtGui import QIcon, QFont, QImage, QTextDocument from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtCore import PYQT_VERSION_STR IMAGE_EXTENSIONS = ['.jpg','.png','.bmp'] def splitext(p): return os.path.splitext(p)[1].lower() class TextEdit(QtWidgets.QTextEdit): def canInsertFromMimeData(self, source): if source.hasImage(): return True else: return super(TextEdit, self).canInsertFromMimeData(source) def insertFromMimeData(self, source): cursor = self.textCursor() document = self.document() if source.hasUrls(): for u in source.urls(): file_ext = splitext(str(u.toLocalFile())) if u.isLocalFile() and file_ext in IMAGE_EXTENSIONS: image = QImage(u.toLocalFile()) document.addResource(QTextDocument.ImageResource, u, image) cursor.insertImage(u.toLocalFile()) else: # If we hit a non-image or non-local URL break the loop and fall out # to the super call & let Qt handle it break else: # If all were valid images, finish here. return elif source.hasImage(): image = source.imageData() uuid = hexuuid() document.addResource(QTextDocument.ImageResource, uuid, image) cursor.insertImage(uuid) return super(TextEdit, self).insertFromMimeData(source) class window(QMainWindow): def __init__(self): super().__init__() def treeselectionChanged(self, selected, deselected): filename = self.model.filePath(selected.indexes()[0]) if os.path.isfile(filename) and filename != self.c_file: self.savefile() print('changing file to ', filename) self.loadfile(filename) self.c_file = filename def settext(self, c_text): qt_subversion = int(re.match('5\.(\d*)',PYQT_VERSION_STR).group(1)) if qt_subversion >= 14: self.textedit.setMarkdown(c_text) # to automatttically change some formatting, e.g. * to bulleted list #self.textedit.setAutoFormatting(QtWidgets.QTextEdit.AutoAll) else: self.textedit.setText(c_text) return True def savefile(self): """saves the current qtextedit content to file""" #save the old file out = self.textedit.toMarkdown() tmp = open(self.filename,'w') tmp.write(out) tmp.close() def loadfile(self, filename): c_text = open(self.c_file, 'r').read() self.settext(c_text) self.filename = filename self.setWindowTitle(os.path.basename(filename)) print('new file loaded: ', filename) return True def eventFilter(self, obj, event): if event.type() == QtCore.QEvent.KeyPress and obj is self.textedit: if event.key() == QtCore.Qt.Key_Return and self.textedit.hasFocus(): self.textedit.setMarkdown(self.textedit.toMarkdown()) return super().eventFilter(obj, event) def closeEvent(self, event): """" called if program is closed, to save the current file""" self.savefile() def createUI(self, basepath, filename): self.centralwidget = QWidget() self.windowLayout = QHBoxLayout() self.c_file = os.path.join(basepath, filename) # XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX # the left side of the file viewer self.model = QFileSystemModel() root = self.model.setRootPath(basepath) self.model.setNameFilters(['*.md']) self.model.setNameFilterDisables(False) self.tree = QTreeView() self.tree.setModel(self.model) self.tree.setRootIndex(root) self.tree.setColumnHidden(1, True) self.tree.setColumnHidden(2, True) self.tree.setColumnHidden(3, True) self.tree.setAnimated(False) self.tree.setIndentation(20) self.tree.setSortingEnabled(True) self.tree.setWindowTitle("Dir View") self.tree.resize(640, 480) self.tree.selectionModel().selectionChanged.connect(self.treeselectionChanged) self.windowLayout.addWidget(self.tree) # XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX # the edit window on the left side self.textedit = TextEdit() self.loadfile(self.c_file) self.windowLayout.addWidget(self.textedit) # XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX self.centralwidget.setLayout(self.windowLayout) self.setCentralWidget(self.centralwidget) self.show() def main(basepath, filename): main = QApplication(sys.argv) u_window = window() u_window.createUI(basepath, filename) u_window.show() sys.exit(main.exec_()) if __name__ == '__main__': print('len', len(sys.argv)) print(sys.argv) if len(sys.argv) != 3: print("usage: python mynotes basepath filename") else: main(sys.argv[1], sys.argv[2]) -
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Dear Denni,
I'm very sorry for not having replied earlier - I somehow did not get a notification and was moving flat in the meantime, so I forgot about this pet-project for a while.
Any ascii file will do - if you have qt > 5.14 it could also be markdown formatted. So it could e.g. be
this is the heading
- this is the first line
- this is the second line
end.
The files are meant to contain a kind of todo list for myself.
