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Qt Modernization

QWidget to QML Migration

Incremental migration from Qt Widgets to Qt Quick/QML while preserving existing C++ business logic and reducing product disruption.

Expected outcomes

Modern UI layer
Preserved C++ logic
Lower migration risk
Incremental rollout

Fit

Who this service is for

Companies maintaining large legacy QWidget applications
Teams that need a modern touch-friendly interface
Products moving to Qt 6 and rethinking UI architecture
CTOs who need migration without pausing product development

Deliverables

What we deliver

Concrete engineering outputs designed for maintainable Qt products, not just UI mockups.

Migration assessment and risk map
Incremental migration plan
QML component architecture
C++ logic preservation strategy
Hybrid Widgets/QML transition path
Performance and regression validation

Process

How the work runs

01

Audit existing application

We review Widgets screens, C++ business logic, model/view usage, build system, dependencies, and migration risks.

02

Define migration slices

We identify screens or modules that can move to QML first without destabilizing the full application.

03

Build QML architecture

We design reusable components, C++ model boundaries, and a transition strategy for hybrid operation where needed.

04

Validate and roll out

We test visual parity, behavior, performance, and integration with existing backend code before expanding migration.

Engagement models

Scoped delivery

Best for a defined Qt application, migration, prototype, or HMI screen set with clear milestones.

Dedicated Qt engineering

Best when you need a long-term Qt/QML developer or small team supporting your roadmap.

Architecture consulting

Best for technical validation, migration planning, performance reviews, or platform feasibility.

Technical stack

Qt technologies we use

Practical Qt tools and platform targets we commonly use to move projects from prototype to maintainable production delivery.

Qt Widgets

Qt Quick

QML

C++

QAbstractItemModel

Qt 6

CMake

QQuickWidget

FAQ

Common questions

Short answers to the questions teams usually ask before starting this kind of Qt engagement.

01

Do we need to rewrite the whole application at once?

No. In most cases we recommend an incremental migration where high-value screens move to QML first while stable C++ logic remains in place.

02

Can existing C++ models work with QML?

Often yes. Qt's model/view concepts, Q_PROPERTY, signals, slots, and context properties can expose existing C++ logic to QML with careful boundaries.

Next step

Need this capability on your product?

Send your Qt version, target platform, current codebase state, and timeline. We will reply with a practical technical direction.

Share these details

Qt version and platform
Existing codebase state
Target hardware or OS
Timeline and delivery goal