Qt for Python

@Mikeeeeee So you will have to write code to detect exactly those things you want to monitor. Probably through an event filter. And if none arrive the user is inactive, in those terms. I don't know what else to say.

@iwrwrc Changes made from a QTreeWidget should go through to the underlying model and be saved there. They will persist across tab changes, unless you have something wrong in your code.

Can you pass a singleton into a QML register Type? or rather import a singleton so that this python file can access the continuously changing data from another python file or class instance. For example "from main import myTestClasse" so far the data is not updating to match the singleton myTestClasse and was wondering if there is an extra step that needs to be taken? From the example listed above with modifications :... """ import numpy as np import threading #from PySide6 import Qt import cv2 """ from PySide6 import QtCore, QtGui, QtQml from PySide6.QtCore import QObject, Signal, Slot, Property from main import myTestClasse def max_rgb_filter(image): # split the image into its BGR components (B, G, R) = cv2.split(image) # find the maximum pixel intensity values for each # (x, y)-coordinate,, then set all pixel values less # than M to zero M = np.maximum(np.maximum(R, G), B) R[R < M] = 0 G[G < M] = 0 B[B < M] = 0 # merge the channels back together and return the image return cv2.merge([B, G, R]) gray_color_table = [QtGui.qRgb(i, i, i) for i in range(256)] class CVCapture(QtCore.QObject): #once the camera caputre is started from completion of the QML , send signal that the image capture has started started = Signal() imageReady = Signal() indexChanged = Signal() def __init__(self,parent=None): super(CVCapture, self).__init__(parent) self._image = QtGui.QImage() self._index = 0 #self.image_handler = image_handler #self.m_videoCapture = cv2.VideoCapture() self.m_timer = QtCore.QBasicTimer() #self.m_filters = [] self.m_busy = False #self.testImage = None #self.frame = None @Slot() @Slot(int) def start(self, *args): print('start the image display') if args: self.setIndex(args[0]) self.m_timer.start(50, self) self.started.emit() @Slot() def stop(self): self.m_timer.stop() def timerEvent(self, e): #print(f'image handler data is {image_handler.oneSecondCounter}') if e.timerId() != self.m_timer.timerId(): return #print('timerEvent Happening') #grabbedImage = image_handler.thumbnailImage.copy() #ret, frame = self.m_videoCapture.read() #ret = False #print(f'testimage size{testImage.shape}') if myTestClasse.image is not None: self.testImage = myTestClasse.image.copy() #print(f'thumbnail image :{self.testImage}') #self.frame = self.testImage.copy() #ret = True #cv2.imwrite('test3.png',self.testImage) else: return #if not ret: #print('timerEvent Stopping') #self.m_timer.stop() #return if self.m_busy == False: #print('start thread show image') #cv2.imwrite('test4.png',self.testImage) if self.testImage is not None: #localTest = self.testImage.copy() #print('start thread show image2') #cv2.imwrite('test4to5.png',self.testImage) #threading.Thread(target=self.process_image, args=(np.copy(self.testImage),)).start() self.process_image(self.testImage.copy()) @Slot(np.ndarray) def process_image(self, frame): #print('process image') cv2.imwrite('test5.png',frame) self.m_busy = True #print(f'flag is{self.m_busy}') #for f in self.m_filters: # frame = f.process_image(frame) image = CVCapture.ToQImage(frame) #if self._image == image: # self.m_busy = False # return self._image = image self.m_busy = False self.setImage() #QtCore.QMetaObject.invokeMethod(self,"setImage",QtCore.Qt.QueuedConnection) @staticmethod def ToQImage(im): if im is None: return QtGui.QImage() if im.dtype == np.uint8: if len(im.shape) == 2: qim = QtGui.QImage(im.data, im.shape[1], im.shape[0], im.strides[0], QtGui.QImage.Format_Indexed8) qim.setColorTable(gray_color_table) return qim.copy() elif len(im.shape) == 3: if im.shape[2] == 3: w, h, _ = im.shape rgb_image = cv2.cvtColor(im, cv2.COLOR_BGR2RGB) flip_image = cv2.flip(rgb_image, 1) qim = QtGui.QImage(flip_image.data, h, w, QtGui.QImage.Format_RGB888) return qim.copy() return QtGui.QImage() def getImage(self): return self._image @Slot() def setImage(self): self.imageReady.emit() def index(self): return self._index def setIndex(self, index): if self._index == index: return self._index = index self.indexChanged.emit() image = Property(QtGui.QImage, fget=getImage, notify=imageReady) index = Property(int, fget=index, fset=setIndex, notify=indexChanged) """

You can implement 'add row to QTableView' action for button in that way: from PyQt5.QtGui import QStandardItemModel, QStandardItem ... table = QTableView(...) table.setModel(QStandardtemModel()) addRowButton = QPushButton('Add row', ...) addRowButton.clicked.connect(lambda: table.model().insertRow(0, [QStandardItem('1'), QStandardItem('example'), ...])

@Tauri Read https://doc.qt.io/qt-5/qtquick-modelviewsdata-cppmodels.html#qvariantlist-based-model

@Black-Cat execute sudo apt-get install '^libxcb.*-dev'

You always have to set the baseUrl if you want to use setHtml, but if you want to repeat the code then create a method that does it: class Foo(Bar): def __init__(self, ...): super().__init(...) self._base_url = QUrl() self.base_url = QUrl.fromLocalFile(os.getcwd()+os.path.sep) self.webPage = ... @property def base_url(self): return self._base_url @base_url.setter def base_url(self, url): self._base_url = url def update_html(self, html): self.webPage.setHtml(html, self.base_url) then: self.update_html('<img src="image.png"/>');

@levoxtrip I don't know anything about your "fading", but QTextEdit::append() always appends the text at the end. To insert somewhere else it looks like you must use QTextEdit::insertHtml/insertPlainText(), and those insert at the current cursor position, so you may need to move it with QTextEdit::moveCursor/setPosition() or similar.

@danielcharles Why do you post a link to a video handling C#? This is Qt forum...

Hi, IIRC, the about dialog that you can trigger from the help menu should give you this answer.

Well thanks you

@SGaist Sorry for the little late reply. https://www.reddit.com/r/learnpython/comments/la5yze/how_to_display_error_messages_in_cmd_window_to/

Hi and welcome to devnet, Are you using layouts to build your UI ?

@Willkroken I need to check 3 different columns to check what order the rows should be arranged in If you stick with a QTableWidget, you have to sort your table by your criteria before you put the rows into the table, so go ahead and do so. Or it seems to me if the answer at https://stackoverflow.com/a/18652060/489865 using You can try to subclass the QTableWidgetItem and reimplement operator<() of it. works that is possible, but I don't know how you override an operator from Python. If you move to a QTableView and have your own model, you can interpose a QSortFilterProxyModel and override lessThan() to do your 3 column comparison.

@benyeyeye use focusProxy(): from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets # or # from PySide2 import QtCore, QtWidgets, QtWebEngineWidgets class BetterWebView(QtWebEngineWidgets.QWebEngineView): def __init__(self): super().__init__() self.load(QtCore.QUrl()) self.focusProxy().installEventFilter(self) def eventFilter(self, source, event): if ( self.focusProxy() is source and event.type() == QtCore.QEvent.MouseButtonPress ): print("ok") return super().eventFilter(source, event) if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) view = BetterWebView() view.load(QtCore.QUrl("https://www.qt.io")) view.show() sys.exit(app.exec_())

So apparently, this is due to the Dash debug mode. I don't know why, however. Change this line app.run_server(debug = True) to app.run_server()

@JonB Thanks. I use os.path.normpath everywhere to get rid of this kind of problems :)