Thanks for the input! I think I'm going to go with QGraphicsView for the notation and use QQuickWidgets throughout the other pieces of the UI that don't need access to the entire model. I'm hoping that won't be too complicated and will give me the best of both worlds. But I do wonder: is there a specific piece of Qt Quick that's supposed to a "replacement" for QGraphicsView? It seems like the scene graph is a bit too low level, but it's also the only way to gain a lot of control and keep things mostly on the C++ side. It would be nice if the built-in QML elements are exposed via a C++ API at some point.

It does look like a similar issue. I was able to find a workaround thanks to this bug report. Setting the target OSX version to 10.12 in CMake did the trick.

As I said earlier, very difficult to get the status ethernet using UDP. UDP is fire & forget protocol. You need to build your own mechanism to monitor the status. It could be simple TCP connection to see if the connection alive with remote server. If not you need to get the interfaces status periodically through QNetworkInterface & check if the interface is up. You can use QNetworkInterface::flags() & QNetworkInterface::IsUp to check the status.

@stan.m The root cause was a thread-safety problem; data was read by the main thread at the same time that it was written by another thread. Specifically, the C++ getter for the QString "value" property was called at the same time that the value was written. Other data was written and read at the same time, but their types write as an atomic operation on the ARM processor. The data that caused the problem was of type: QString.

A QString object's member data is a heap pointer to the 16-bit unicode array. When written and read simultaneously, the C++ getter passes a corrupted pointer into the QML runtime. As I wrote before, the "binding loop" warning came after many of these "first-chance" exceptions and had nothing to do with a true binding loop.

The first-chance exception occurred when two value changes occurred back-to-back and the QML runtime called the C++ getter to retrieve the value at the same time that the second change was written.

My initial "fix" worked because polling the value every 100ms allowed the first change propagate to QML long before the next change comes in.

I since have revised the code to use a mutex to prevent writing and reading simultaneously.

In addition to what @jsulm, *.ui is XML format.
If somebody is really crazy:) we can generate the XML also. But not required at all.

Hi,

Since you are using V-Play, you might want to bring that question to their forum.

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..

Note: it turns out that setting background to Qt.transparent doesn't make sense. It worked simply because the types are incompatible and background got set to null. It's easier to simply set background to null to get the same result.

@raven-worx you sir saved my life! I cant believe i was stuck at this for 2 days, when it was simply just about using the right object in qml. thanks!

@raven-worx Thanks, I will try that. I let you know if it works or not.

@sierdzio. Thank you for your answer. I tried as you suggested with

GridView { width: 300; height: 200 model: FirstModel.num delegate: Gauge { x: 10 y: 10 minimumValue: 0 value: modelData maximumValue: 100 } }

But I see nothing in the GUI. I will surely try later with QAbstractItemModel you suggested.

@stcorp I'll have to look at that later, but I didn't know about the resizeContent method from Flickable. From waht I'm seeing in your code and in the documentation, this looks like a good solution. Thanks!

Use a separate QObject-derived class and set it as context property.

Other options:

https://doc.qt.io/qt-5/qtqml-cppintegration-topic.html https://doc.qt.io/qt-5/qtqml-cppintegration-interactqmlfromcpp.html

@Jasur i read these all i can see them explaining about tile naming convention but i want to know is there any software by which automatically i should get tiles named according to slippy maps naming convention? as i downloaded tiles using maperitive, i got tiles but different names, so it will be very difficult for me to rename each one of file in case of large number of tiles for using the program as mentioned in link 1 posted by me.

@GrecKo You're right! I am defenetly doing some kind of Game of Life)
I've managed to create a map, using GridView and QAbstractListModel like in this video.
I also understood how to pass values using model's roles. Now I'm trying to find out how to pass user defined classes through QVariant. I guess i also should register my 'Cell' class with qmlRegisterType<>

@noone You will need to extract the content from qrc file to some location writable by your application and then load it from there in webview.

hi,

Gauge{ maximumValue:100 minimumValue:0 onValueChanged: { if(value > 80){ maximumValue=200 } }

@mrjj
I have moved forward from calling my saved dates to receive the following:

Read Value: [object Object],[object Object],[object Object],[object Object],[object Object],[object Object] for key: dates

(one for each date saved)
when adding

if(success) { console.log(JSON.stringify(value)) }

I can also read the saved dates in the format of:

[{"date":"2018-10-01T21:17:00.926"},{"date":"2018-10-02T12:00:00.000"},{"date":"2018-10-03T12:00:00.000"},{"date":"2018-10-06T12:00:00.000"},{"date":"2018-10-07T12:00:00.000"},{"date":"2018-10-08T12:00:00.000"}]

now how would I determine these dates are saved in my calendar to add the marker?

I have tried adding a property bool to the marker so the read value equals isMarked = true yet this either marks every date on the calendar or none at all depending on how I am working this?!?

How would I convert the JSON string to individual date reads?

Hi,

Add a setter to your model that is Q_INVOKABLE and pass your query through it. Don't forget to add proper error checking to give feedback to your user if something goes wrong.

Alright, I found the error:

In the TextEdit {} I had inputMethodHints: Qt.ImhNoPredictiveText because in earlier tests, sending emojis to TextEdit crashed the app.

But with PredictiveText disabled, all fancy input methods and hence the different keyboards don't work. Also, Emojis are no problem anymore and animated Gifs are disabled.

@sierdzio. Thanks a lot for your answer.

@milan
you could try enabling mipmap for a smoother transformation, this will make the resizing a bit slower and is the reason why it's off by default.

But if your image has a fixed size to begin with, than it doesn't matter much.

//MyToolButton.qml ToolButton { property alias source: img.source property int size: 32 Image{ id: img width: size height: size mipmap: true } Layout.preferredHeight: size Layout.preferredWidth: size }

@milan Hi,
You can do it using a delegate and a ToolTip component:

import QtQuick.Controls 2.2 as QC2 ... TableViewColumn { id: titleColumn title: "Title" role: "title" movable: false resizable: false width: tableView.viewport.width - authorColumn.width delegate: QC2.ItemDelegate{ id: lb hoverEnabled: true text: model.title width: parent.width QC2.ToolTip { delay: 250 parent: lb visible: lb.hovered text: "Tooltip text" //put styleData.tooltip here } } }

This code is extracted from the TableView example which I have modified to add the ToolTip.

Any sample code to check on this ?

@ambershark @mranger90
I saw your code, There is a major difference between the way you are running the application and I am running the application.
If I run the application as a qml application, the application runs well. No problem at all.

However, I am trying to run it the way a scripting language should work or what I expect it to work.
I am running the main.qml without including in the Resources. I want to be able to do that at run time. Including it in Resources defeats the purpose.

Secondly, I am running the qml through the mainform.cpp at runtime. So Ideally i want to select the qml file to run and then run it.
Which works as far as running the qml is concerned. However, when it comes to interaction of the testing.cpp and the qml, that does not work.

I have attached the zip of the complete project in qtcreator FYI.

[0_1536639580948_scripttest1.zip](Uploading 100%)

Hi @larkei15
I don't think using a Repeater for dynamically changing models is the best approach.

From the Cadaques book:
https://qmlbook.github.io/ch06/index.html

For static models, a Repeater can be used as the view. It is easy to combine it with a positioner such as Row, Column, Grid or Flow to build user interface parts. For dynamic or large data models, a view such as ListView or GridView are more appropriate. These create delegate instances on the fly as they are needed, reducing the number of elements live in the scene at once.

And from the QML doc:
http://doc.qt.io/qt-5/qml-qtquick-repeater.html

Considerations when using Repeater
The Repeater type creates all of its delegate items when the repeater is first created. This can be inefficient if there are a large number of delegate items and not all of the items are required to be visible at the same time. If this is the case, consider using other view types like ListView (which only creates delegate items when they are scrolled into view) or use the Dynamic Object Creation methods to create items as they are required.

I wager your syncing problems are due to that...

Is there any reason why you are choosing the Column+ Repeater approach over the ListView approach?

Ok, solution 2 was simpler than i expected. I'll post my code below, in case someone else needs something similar. It flips a QEntity along the x-axis and the winding of the triangles. It only works with the primitive type QGeometryRenderer.Triangles.

Jan

void mirrorEntity(Qt3DCore::QEntity *entity) { for (QNode* node: entity->childNodes()) { if (QEntity* e = dynamic_cast<QEntity*>(node)) mirrorEntity(e); if (QGeometryRenderer* r = dynamic_cast<QGeometryRenderer*>(node)) mirrorGeometryRenderer(r); } } void mirrorGeometryRenderer(QGeometryRenderer *geometryRenderer) { QGeometry* geometry = geometryRenderer->geometry(); for (QAttribute* a : geometry->attributes()) { if (a->name() == QAttribute::defaultPositionAttributeName()) { QByteArray data = a->buffer()->data(); // flip along x-axis float *bufferContent = reinterpret_cast<float*>(data.data()); int chunkSize = a->byteStride()/sizeof(float); int positionOffset = a->byteOffset(); for (uint i=0; i<a->count()*chunkSize; i+=chunkSize) { int offsetI = i + positionOffset; bufferContent[offsetI] = -bufferContent[offsetI]; // invert x } // change winding const int size = a->byteStride(); char* tmp = new char[size]; for (int i=0; i<data.length(); i+=a->byteStride()*3) { memcpy(tmp, &data.data()[i+size], size); memcpy(&data.data()[i+size], &data.data()[i+size*2], size); memcpy(&data.data()[i+size*2], tmp, size); } delete[] tmp; a->buffer()->setData(data); break; } } }