QtQuick or Quick/Widget for touch application?

[federico.massimi]

Hi, I'm starting a new application.
I state that my experience is exclusively on QTWidget.
I have to make an application that:

1. Show a map and add images and labels in dynamic overlays.
2. Interact with hardware through a C ++ SDK.
3. Support the touch screen (have to run on a Windows 10 tablet).
4. It must be very very stable and reactivity.

I saw that there is a QtQuick item for the map very simple and I would like to use. Now the possibilities are:

1. Write the whole application with QtQuick, but having never used it I don't know its stability and reactivity, C++ inetraction and learning curve.
2. Use only the QtQuick item in a normal Widget application, but even here I do not know the stability and responsiveness of a hybrid application (Quick/Widget) and the performance of QtWidget with touch screen.

Someone can help me.
Thanks in advance!

[closx]

Well, you will see that gui development with the QtQuick is a way easier. But I can say that, it can be less stable than the Widget some times. I would recommend you to develop your gui with the QtQuick and most of the primal functions with the C++.
Hope you will have success on your work!

[federico.massimi]

What do you mean with primary functions in C ++? all my functions are in C ++.
Let me explain better, my application consists of a few buttons, and each of these when pressed, via a callback, calls a function of the hardware SDK.
In addition, it must show a map with overlays based on the information that periodically reads with an SDK function.

[closx]

@federico.massimi please mention my username next time you answer, so I can see that you have answered :D
Okay, I need to be more spesific. I mean, for example you have a function doThat() in file function1.cpp and a button inside myqmlfile.qml. You can create a registery for the file function1.cpp as a QML registery in main.cpp

qmlRegisterType<Function1>("function.qml.name", 1, 0, "Function1");

See QML C++ Integration Page for more.
And import your cpp file into myqmlfile.qml

import function.qml.name 1.0

And create the function for the button press trigger inside myqmlfile.qml

Function1{
    id: function1
}

Rectangle{
              id: buttonbg
              width: 120
              height: 70
              radius: 8
              color:"black"
              anchors.centerIn: parent
              Text{
                            anchors.centerIn: parent
                            text:qsTr("Do Function")
                            font.pixelSize: 18
                            color: "white"
                            }
                            MouseArea{
                                          anchors.fill: parent
                                          onClicked: {
                                          function1.doThat() //will execute your function on clicked
                                          }
                                          onPressed: {
                                                        buttonbg.color = "#1c1c1c" //to change bgcolor on pressed
                                          }
                                          onReleased: {
                                                        buttonbg.color = "black" //to change bgcolor on released
                                          }
                            }
              }