General and Desktop

Hi, From the looks of it, that's indeed the fix you are looking for.

You must not use qDebug() when you want to output something to the console not indented for debug output...

@Kaluss said in Signature not normalized warning: My signal takes QString and slot takes const QString&. Out of curiosity, why not use a ˋconst QString &` as well for your signal ? There no reason to force a copy when it's not needed.

@ocgltd said in QMYSQL driver not loaded. available drivers: QSQLITE , QMYSQL , QMYSQL3: @ocgltd Wow..I solved it. The syntax for creating the QSqlDatabase is incorrect. Once fixed it has not trouble connecting. What a horrible error message for this! Wasted 7 hours. Nothing at all in what you showed, being compilation/linker messages, is related to this.

@kendo My HP laptop has a parameter in the BIOS, which I have never changed, so that it only ever charges to 80%. Dunno what that is about.

Any database in he Qt resources will be inherently read-only (it is part of the executable itself). Whether you can open such a database in situ will depend on exactly what database engine and how you are doing that. If you needed a writable database, even if it is disposable, you can copy the resource file to an operating system temporary location and open if from there.

Using Qt5 and possibly KWindowSystem may solve the problem. In the KDE Plasma desktop environment, the window manager KWin is responsible for handling and managing windows. When you right-click on a window title bar and select "Keep Above Others", KWin receives a command to make that window stay on top. This is an internal implementation in KWin, and is independent of Qt and QWidget. KWin sets that window to be always on top and adjusts the window stacking order accordingly. KWin provides interfaces to interact with other KDE applications and libraries, such as the aforementioned KWindowSystem. Through these interfaces, you can programmatically interact with KWin, such as setting a window to stay on top. However, on Wayland, KWin does not provide a D-Bus interface for this functionality. This is why on Wayland, we need to use KWindowSystem, as it abstracts the interaction with the window manager and provides a unified API for both X11 and Wayland. On Wayland, KWindowSystem uses other ways to communicate with KWin instead of D-Bus. Therefore, to summarize, in the KDE Plasma desktop environment, KWin is responsible for the "Keep Above Others" functionality. In programming, we can use KWindowSystem (as a higher-level abstraction) to set a window to stay on top. This ensures compatibility between different window managers and display servers.

Hello, I'm aware this topis is quite old, but maybe it could still help somebody. I had the same problem and solution described here: https://stackoverflow.com/questions/34918115/getting-no-qmlscene-installed-warning-in-qt-creator-on-ubuntu has worked for me. After installation of "qtdeclarative5-dev" package the error message "No qmlscene installed" disappeared. V.

@ChrisW67 It's a warning that people may have problems... I have reported it to MS

@Damian7546 I too do not understand what you are still asking. If you want to put a QByteArray and a uint8 into the queue, as a single item, why don't you use the struct approach both @SGaist & @jsulm have suggested? What is the problem with that? You can create the struct in MyFunction::transaction(const QByteArray &data,quint8 reqType) if you wish to retain a function which accepts them as separate parameters. If, for some reason, you are asking whether you can have two different typed items in a QQueue, one a QByteArray and another a uint8, then you cannot, what type would the QQueue<...> be?

I lean toward QTreeView::setColumnHidden() rather than QSortFilterProxyModel::filterAcceptsColumn(), but either will work. Using a filter proxy will require a call to QSortFilterProxyModel::invalidate() or QSortFilterProxyModel::invalidateFilter() each time columns should be shown or hidden. Showing and hiding in the view rather than via a model might be more efficient. As for how to trigger it,

@MyNameIsQt I would be guessing that the QImage internal data is stored in ARGB layout (A = 0xff probably), and you are asking the foreign library to treat that as RGBA. You lose the blue and get a strong red. Take a look at QImage::format().

@jeremy_k yeah, I did just that. Still got the error, but it was due to another object being creating in the worker c'tor, then accessed by the worker. I deferred the object creation, and now it's fixed. Thanks to all who looked.

@lano1106 A little more elaborated version: class SplitterHandle : public QSplitterHandle { void mouseReleaseEvent(QMouseEvent *event) override { if(!rect().contains(event->localPos().toPoint())) return; int width2=splitter()->widget(1)->maximumWidth(); // 2nd panel max width int splitWidth=splitter()->width(); if(splitter()->widget(1)->width()==0) splitter()->setSizes({splitWidth-width2,width2}); else splitter()->setSizes({splitWidth,0}); } void paintEvent(QPaintEvent *) override { QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing); QFont font=this->font(); font.setBold(true); painter.setFont(font); if(splitter()->widget(1)->width()==0) { painter.drawText(rect(),Qt::AlignCenter,"<"); } else painter.drawText(rect(),Qt::AlignCenter,">"); } void mouseMoveEvent(QMouseEvent *) override { // block mouse move } void enterEvent(QEvent *) override { setCursor(Qt::ArrowCursor); } public: SplitterHandle(QSplitter* parent=nullptr) : QSplitterHandle(Qt::Horizontal, parent) {} }; [image: splitter1.png] [image: splitter2.png]

Thankyou! you're correct i was testing it wrong, thats why i was getting a different animation time, sorry my bad!

@Christian-Ehrlicher I've alrady cherry-picked it there, but integration fails with unrelated errors. Need to investigate...after the weekend.

@mzimmers If it does I definitely don't have it, but I use the camera every day with google meet, obs, etc.