@mrjj That's it, thanks :)

@mrjj That worked, thank you very much.

@JonB I am passing to QML for this reason. There, placement and dimensioning of graph oblect is very easy to do. I like also the stong division between frontend a nd backend!!!

I'm sorry, my bad :- (( @mrjj said in Detect top/parent move event on child widget: @Dariusz said in Detect top/parent move event on child widget: Or the issue is that sometimes WidgetA is a window and life is good, but then same class (WidgetA ) is used in a layout and then suddenly it cant inform widgetB any more since only top parent knows it was moved ? Something like that ? Yes, since its dynamically generated UI based on a user template, the WidgetA can be inside layout of another widget, or be by itself.

@Dariusz "You can call QWidget::mapFromGlobal() to translate it to widget coordinates." (From https://doc.qt.io/qt-5/qcursor.html#pos)

ok, stupid me! I forgot to include Qwt in the *.pro file: ... CONFIG += qwt INCLUDEPATH +="/usr/include/qwt" LIBS += -L/usr/lib -lqwt

You can create custom views if you want. See the Chart Example

@JonB said in How to change background-color of widget, but not items: [Looks like @J-Hilk types faster than I can... :) ] Sometimes, but I imagine I write with more errors as well :)

@SGaist I tried the Qt 5.12.6 and it did the trick! Thanks. But interestingly, the title of the main application is no longer scaled by "Make text bigger" setting but the dockwidget ones does. I guess that there is an intention not to scale the main title. "Make everything bigger" setting does scale everything properly now except the titlebar height of only the main application looks not enough for the enlarged font size. I will give qt5.14 a try as well.

@hobbyProgrammer I don't know what is going on here, but I note that for a given circuitID you do two new Circuit(circuitID)s, one in fillCircuitMenu() and another any time slot goToCircuit(int index) is invoked. I don't know if that is correct, no re-use of same Circuit instance? Separately, I don't think there is any need to use deprecated QSignalMapper any longer. You can replace with new signal/slot syntax (you should get away from SIGNAL/SLOT() macros in all new code) plus a lambda. See e.g. https://doc.qt.io/qt-5/qsignalmapper.html#details for an example of this.

@hobbyProgrammer Do you actually have event loop running when you emit the signal?

Set a stylesheet for the widgets: QWidget:hover { border: 1px solid red; } And get the clicked widget's pointers by connecting to QApplication::focusChanged(QWidget *old, QWidget *now).

@Dariusz Sorry to make a post to just confirm what @SGaist has said above, but 20 * 75 == 1,500-odd line edits average. That's a lot! (And I pity the user who has to fill those in ;-) ) I think the suggestion that you look at the possibility of some kind of table instead needs reiterating. And @VRonin will then be here to ensure that you achieve this using item delegates instead of widgets in your table, so it will all be fast and not use up too much memory/resources ;-)

@jsulm Hello! Sorry, but that doesn't work. I tried to insert a loop in different places, but the result remains the same. I also tried to display the main widget. @SGaist Hello. So the VideoWindow.h file (VideoWindow class) is my custom widget. This is the first piece of code that I presented.

@SGaist said in SetTitlebarWidget & its height: Hi, You should show your widget implementation. Its something like fo = QDockWidget() fo.show() w = QPushButton("yoyoyooy") w.setMaximumHeight(10) fo.setTitleBarWidget(w) The PushButton is x pixels below top of window, so the title bar is still xx height.

@SGaist I ended up hocking up to resize event of parent widget to find out when size changed & resize my other widget acordingly. I ended up using "invisible" QLabel that retains size as my "spacer". I had to change its spacing role on the go depending of one or more widget are visible or not as I needed to retain correct order. So far works great. TIA

@SGaist Ok that sounds a bit bad like - "delete while in use" situation. So it seems plausible it could crash from that in some cases.

@SGaist Hey, nope did not try it yet. It happens on 2-3 different pcs. So I don't think its hardware limited, maybe OS? But dont think its drivers. Nvidia/intel gpus.

I don't believe X11 will allow negative coordinates, as traditional geometry uses the form AxB+C+D where the (+) can also be a (-) to cause the offset to be from the right hand side or bottom of the display. You should however be able to use coordinates that are GREATER than the visible desktop.

...the rest. Next phase is to use recursion to make a Sierpinski Triangle. // Inner triangle pt1.setX(pt1.x() + side1.dx()/2); pt1.setY(pt1.y() + side1.dy()/2); pt2.setX(pt2.x() + side2.dx()/2); pt2.setY(pt2.y() + side2.dy()/2); pt3.setX(pt3.x() + side3.dx()/2); pt3.setY(pt3.y() + side3.dy()/2); side1 = QLineF(pt1, pt2); side2 = QLineF(pt2, pt3); side3 = QLineF(pt3, pt1); myTriangle.clear(); myTriangle << side1 << side2 << side3; mypainter.setPen(Qt::red); mypainter.drawLines(myTriangle);

@jsulm ok I found out the solution. I had to change the engine for a QQuickView in the main.cpp. But is there any method to create a new kind if widget un qml and insert It like I can maje with a button ?

Hi and welcome to devnet, Glad you found a solution and thanks for sharing ! One thing you can do is to take a look at the release logs to see what has changed. However from your description you may have found a regression. Did you already check the bug report system ?

You should really read the chapter about the parent/child relationship here: https://doc.qt.io/qt-5/qobject.html#details ".... The parent takes ownership of the object; i.e., it will automatically delete its children in its destructor" So if they are all children of your mWidget then they will get deleted when mWidget is destroyed.

got solution. before using the minimum size function set the windowstate Qt::WindowFullScreen. In my case I used line this->setWindowState(Qt::WindowFullScreen); before this->setMinimumWidth(1366); this->setMinimumHeight(768);.

That article answers quite a few questions I had about that scenario, woah nice thanks! But... I kinda like the idea of more "control"... somehow, creating the widget this way allow the user to resize it which won't be possible using a popup, so I would like to get the focus to work properly... TIA

You won't get a paint event at all during drag'n'drop I would guess since the cursor is not directly painted by Qt when I'm correct.

Then add a signal to your dialog that you will emit when needed from your mouse move event.

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.

We found a solution to that bug. The Cocoa window itself isn't set to non resizeable. If you do this, everything works as expected. class MainWindow : public QMainWindow { public: explicit MainWindow(QWidget *parent = nullptr) : QMainWindow(parent) { //this will get rid of the size grip widget showing setFixedSize(500, 500); } void mousePressEvent(QMouseEvent *) override { std::cout<<"mouse pressed"<<std::endl; } }; int main(int argc, char *argv[]) { QApplication a(argc, argv); MainWindow w; NSWindow* window = [(NSView*)w.window()->winId() window]; //IMTPORTANT. Otherwise the lower right mouse events will not be passed on correctly by cocoa window.styleMask &= ~NSWindowStyleMaskResizable; w.show(); return a.exec(); }

@J.Hilk Thanks for your test, I checked it and the setValue function is normally called with the right value and the display still doesn't display the change.

You can make a "container widget" that will handle the showing of the label properly.

@kweber said in Add widget to layout programmatically: setLayout(ui->verticalLayout); my bad for posting untested code ui->centralWidget->setLayout(ui->verticalLayout);

@b2soft I want to customize BrowserModel ::data() returning colors using QSS @raven-worx knows much more than I, but I don't get this. role == Qt::TextColorRole will want to return a QBrush (http://doc.qt.io/qt-5/qt.html#ItemDataRole-enum). How is that linked to returning a string to use for a name in a stylesheet? :confused:

Hi and welcome to devnet, What version of macOS ? Did you also check whether the latest beta of 5.12 has the same problem ?