QML and Qt Quick

A ListView appears to be a better match than the more complicated GridLayout and Repeater. ListView { delegate: Item { width: ListView.view.width height: childrenRect.height Text { anchors.right: parent.horizontalCenter text: modelData.firstPart + ":" } Text { anchors.left: parent.horizontalCenter text: modelData.secondPart } } }

The code in my previous post works in some cases but additional conditions must also be met. I eliminated crashes, I think, in Qt 6.1.2 with the following: A buffer to prevent deletion of the View3D in the code above is required. The parent hierarchy of the View3D must not have a null parent. Creating an Item with a null parent, adding a View3D, and then settings the item's parent can lead to a crash. Visibility is important. If adding a View3D to an Item, it seems best to create/add a View3D when the item becomes visible. I'm also releasing the view when the item becomes invisible. This seems to keep Qt happy and so far the crashes are gone.

Thank you very much for the reply, the question was partially solved. Now I post one other but, in according to your reply, more detailed. Thanks again for the reply.

Does it still happen after you ditch all the layouts? I'd cut away until you find the component doing it first.

@Nan-Feng Hi, remember, I'm not a qml developer, so more I can’t help you, sorry! :( But this link can help you https://doc.qt.io/qt-5/qtquick-statesanimations-animations.html Only to start, chenk my code well, it is only a test: import QtQuick 2.12 import QtQuick.Window 2.12 import QtQuick.Controls 2.12 Window { width: 640 height: 480 visible: true title: qsTr("Hello World") Button { id: button x: 44 y: 45 width: 166 height: 69 text: qsTr("Button") background: Rectangle { id: rect color: "blue" states: [ State { name: "change"; when: button.pressed PropertyChanges { target: rect; color: "blue" } } ] transitions: Transition { ColorAnimation { to: "red"; duration: 1000 } } } } }

@raven-worx i cannot specify Layout.alignment in string creating Text because i get error that this property doesn't exist

I discard QQuickPaintedItem and using updatePaintNode with QImage and QSGTexture. The idea from https://stackoverflow.com/a/58597344/5902108 Below is my code. QSGNode* Box::updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *) { QImage canvas(View::width(), View::height(), QImage::Format_ARGB32); QBrush brush; canvas.fill(QColor("transparent")); QPainter painter(&canvas); brush.setStyle(Qt::SolidPattern); brush.setColor(this->color()); painter.setPen(Qt::NoPen); painter.setBrush(brush); painter.drawRect(0, 0, View::width(), View::height()); QSGTexture *texture = this->window()->createTextureFromImage(canvas); QSGSimpleTextureNode *node = static_cast<QSGSimpleTextureNode*>(oldNode); if (!node) { node = new QSGSimpleTextureNode(); } node->setRect(0, 0, View::width(), View::height()); node->setTexture(texture); return node; }

yes, i need to change text, i know is not possible to refer it by ID

Without seeing any of your code, I would guess for you to try with https://doc.qt.io/qt-5/qml-qtquick-state.html For quicker, better quality results, always post working snippets of your code if you can!

@6thC Because I'm using PC and wanna test the Gestures. I want to emit a "Pinch" signal by using the wheel on mouse.

@Nan-Feng said in Get the current page of stackView?: Hello, I switch the content in the stackview through the button event, so I define two components and use id as the unique identifier. But I want to get whether the current page is a certain page when the button is clicked, and if it is, I won’t switch it. So is the current page content obtained through view or currentItem? When obtaining future content and comparing components, should it be compared with the component id or with what to determine whether it is a certain component? (Actually, where does the following if statement compare with the current content of the stackview and the component? ID?) I think you are mixing up something. With Component, you are creating a new component type inside the current QML file. Like you would do it with an external QML file. But StackView.currentItem is an instance of a component. => You are trying to compare potatoes and oranges ;) You can do it by creating an instance of component license or by comparing component type.

@Knj-Tkm @J-Hilk said in Send singal in eventFilter: you have 2 Event instances, one in MyWidget and one in Connect So, my assumption was correct...

i'm thinking it comes down to this.. https://doc.qt.io/qt-5/qtqml-cppintegration-data.html when a QObject is returned from an explicit C++ method call [...] the QML engine assumes ownership of the object. Additionally, the QML engine respects the normal QObject parent ownership semantics of Qt C++ objects, and will never delete a QObject instance which has a parent. So if the engine assumes ownership, then in C++land you can't assume that object is good anymore. So before returning any QObject to QML, make sure the parent is set.

Thanks for your answer ^^ I totally forgot the existance of alias ! Thank you for the remind ^^

thanks. your solution worked but not exactly the way I wanted. I would like to try and get ideas.