Hi all, I finally managed to find out what was the problem. The fix is the following @@ -26,7 +26,7 @@ void MainWindow::mousePressEvent(QMouseEvent* event) // If a QLabel contains the mouse pointer, then this is the QLabel that was selected QList<QLabel*> qLabelList = ui->videoStreamsFrame->findChildren<QLabel*>(); foreach(QLabel *l, qLabelList) { - QPoint mappedMousePosition = l->mapFromGlobal(mousePosition); + QPoint mappedMousePosition = l->mapToParent(l->mapFromGlobal(mousePosition)); if (l->geometry().contains(mappedMousePosition)) { rubberBand = new QRubberBand(QRubberBand::Rectangle, l); rubberBand->setGeometry(l->rect()); So, the mapFromGlobal() is translating the global coordinates to widget coordinates and the geometry(), where we use in order to check if the mouse coordinates are contained in the label, has the coordinates relative to the parent widget. So, we need to map the mouse coordinates to the parent widget, hence the function mapToParent(). Kind regards, Stavros

@BigBen Store them in a container yourself as you create them: QList<QLabel *> labels; for (int i = 0; i < 10; i++) { QLabel *label = new QLabel; someLayout->addWidget(label); labels.append(label); } Assign them an objectName for future reference to recall an individual one: QList<QLabel *> labels; for (int i = 0; i < 10; i++) { QLabel *label = new QLabel; label->setObjectName(QString("label_%1").arg(i)); someLayout->addWidget(label); } QLabel *label_2 = someParentWidget->findChild<QLabel *>("label_2"); Collect them all via findChildren(): QList<QLabel *> labels = someParentWidget->findChildren<QLabel *>();

I see. Thank you.

Awesome, I will check that out, thank you very much!

@new-qt_user-2022 All the best! Feel free to post new questions if you'd like further help.

@jsulm said in Cout in a loop for QLabel Widgets: @Swati777999 Names[ii] = new QLabel(QString("Name %1").arg(ii)); Works perfectly! Thanks.

@DougyDrumz2 said in How do I make a QLabel Blink?: The consensus is evidently to l hide and show a QLabel Not my "consensus :) So far as I am aware, hiding can cause different layout redraw in at least some circumstances. I retain visibility but toggle foreground color to QColor(Qt::transparent) or toggle alpha color value between 255 (opaque) and 0 (transparent) on palette QPalette::setColor(QPalette::Text, colour). Also, creating multiple QTimer::singleShot()s doesn't scale very well if you want to change the number of flashes or the interval between. Or of you have multiple labels to blink and you'd like them all to be "in sync". I use one regular repeating QTimer with a "countdown" and cancellation when it reaches 0. Up to you on both of these.

@Sai-Raul ok. but Qlabels only likes pixmaps.

@Sai-Raul Start here: https://doc.qt.io/qt-5/videooverview.html

@Sai-Raul said in Image showing in QLabel: Already tried that And what was the outcome? Please update your code accordingly.

@eyllanesc Oh I see, it's working now. Thank you!

@J-Hilk Thanks for the response, I'll look into that stackoverlfow thread

@ChrisW67 Thanks! It work like a charm. For the reason to why I was using QLabel, well I'm mostly testing for stuffs. I'll switch it up later.

@JonB Thanks, this is new information for me. Actually the "QVTKWidget" was sufficing my problem to display point cloud data. For now it is working properly because I m using VTK 7.0. It seems post VTK 8.0, the QVTKOpenglWidget needs to be used.

@TUStudi said: I actually have 6 QLabels, so I now have 6 timer and so on Derive a class from QLabel and add that functionality to it. Don't write the same code 6 times! My QLabels have the sizePolicy horizontal: preferred and vertical: fixed and a vertical length of 20. When a text is displayed, the QLabel expands so that the elements above the QLabel are also moved upwards and after the text disappears, they go back to their initial place. Fixed size policy means that widget uses its sizeHint() as the size. If you change the text the size hint also changes, so label grows/shrinks.

PATH ? Why did you change that environment variable manually ?

@Bonnie It works! Thank you Sir or Madame!

The question is very general. So what exactly is the problem you cannot solve, and what have you coded so far?

Hi, To add a layout to a layout there's the "addLayout" method.

Hi, How did you set the QLabel on your QScrollArea ? If you put it in a layout on the scroll area then that's wrong.

Rather than giving the pointer to your MainWindow instance, pass directly the pointer to your label. Basically: mainwindow->ui->label

Thanks for the support guys. I tried making a transparent QPixmap image using Qt::transparent fill for the axis and overlaying it onto my other QPixmap, however it didn't work properly. So I ended up just drawing directly onto the image itself. Not the most efficient method but it seems to work...

@rjmoses Yes it will scale all images to match IconSize.

An update on this. It works perfectly and its a very low-cost solution. My processing time remains almost the same (~10mS) using this method since the painter does the scaling for you when it draws. Thanks for your help guys.

@SGaist said in Add Qlabel as item in QTableview: QStyledItemDelegate Ok..I'll try with that. from google search maybe this kind of output it will give, which maybe as our requirement. Else, I have some lengthy approach..implement custom label with mousepressevent handled which emits the object name and add these custom labels, 20 in HLayout and add hlayouts in a vlayout... Thanks!

@SGaist Thank you very much for the quick reply. I've removed both the horizontal and vertical layout boxes and everything works exactly as I want. Sometimes newbies make life more complicated for themselves than it needs to be! Thanks again!

no, decrese the font size and see if it works. then you'll know whether you can change font size at all. If it works then that should be a hint as to why you cannot increase the size.

@mrjj I tried your code, here's the result:

I resolve it. I setted font of text as property of QML Text component. (Like font.family : parent.fontfamily) and on Qt 5.7's QML, there are no enough options to control font properties. so, I moved to C++ side and set a whole application font. QFont font = someClass.getLangFont(); //set property of font instance here // such as hinting policy, style etc. QApplication::setFont(font); now it looks very cleary... thank you..

Why are they not ?

The Basic Drawing Example shows that. In your case, you'd likely just have to paint your image using the correct scaling information.

@SGaist got it.

Thanks for your answer, unfortunately this part of my code is executed in a class that inherits from QMainWindow, I don't have access to the QApplication. Edit: It works using QCoreApplication::processEvents() instead.

Hi, What do you mean by regular string ? If it comes from the Windows API, you should then consider using QDir:: fromNativeSeparators.

@SGaist I tried very hard. But, still am not satisfied with the implementation. And now am feeling helpless. If I set set, fixedsize for QLabel, then scroll bars won't appear if I use zoomout/zoomin. My question is why QLabel won't shrink back after changing size through Qsplitter. I tried all the combinations of sizepolicy and nothing has worked so far

Hi should that not be pointer ? QRubberBand rubberBand; -> QRubberBand * rubberBand; (since you do rubberBand= new QRubberBand(QRubberBand::Rectangle,this) ) that would explain all 3 errors.

What you need in fact is a QFormLayout (a subset of the grid layout) where you can insert the pairs of widgets with QFormLayout::addRow.