Adenilson CavalcantiAdenilson CavalcantiBsc. Msc.Bsc. Msc.
KDE developerKDE developerWebKit contributorWebKit contributor
Effective QMLEffective QMLBest practices for developing with Qt QuickBest practices for developing with Qt Quick
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Presentation structure
The case for QML
How to train yourself or a team
Overview on QML
Good practices
Advanced techniques
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What is this Q-Whatchamacallit?
* http://en.wikpedia.org/wiki/QML
Qt Meta Language (QML)*Declarative vs Imperative
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A case study: QML x QGV*
Requirements: 1 top bar1 lower barscrolling kinetic list in the centerre-scalable
*QGV stands for QGraphicsView
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QGV vs QML: are different, but can solve similar problems.
A case study: QML x QGV
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Which one will be more verbose?
Which one will be faster to develop?
A case study: QML x QGV
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Results
A case study: QML x QGV
QGV QML0
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LOC
Line
s of
cod
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A difference of almost 1000% in development timeQGV: 1 ½ day (8-10 hours)*QML: 1 hour (+ 30 minutes for minor adjustments)
A case study: QML x QGV
*Assuming a ready to use KineticScrolling list and a basic Button
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Question: if you start a new project today, which one will be done earlier?
A case study: QML x QGV
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Managers x designers x developers
QML: what it means for...
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Should I put C++ out of the equation?
Porto de Galinhas (Pernambuco) - Brazil
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Relevant questionsComplexityFunctionalityTeam
QML and C++
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What about QWidgets?
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How many QWidgets?
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Relevant questionsWhat your app need?Desktop x TouchscreenAnimations?Designer assets?
96 Widgets! Not counting all KDE widget or Qt add-ons...
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Right tool to the right job
DevDays@California - 2008
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Trainment
If you are a student
Yeah, Matrix.
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Trainment
Students: use the power of Opensource!Great online documentationQt is opensourceKDEgSoC
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Trainment
Lessons for students:Making mistakes is part of learning process
The one who make more points is also the one who makes more mistakes
While learning, look for the best!
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Relax time...
Ilha Bela (Sao Paulo) - Brazil
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Trainment
If you are a professional/manager
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Trainment
Qt has a real ecosystemICS (USA based)KDAB (Europe)Digia (owned Trolltech)Collabora (ninja-ish guys)
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Services
If you need it today!!!11!
Must have Star Wars reference
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QML: 101
QML elementsVisual: Rectangle, Image, BorderImage, Text, TextEdit, TextInput, AnimatedImage, Gradient
Positioner/Repeater: Column, Row, Grid, Flow, Repeater
Views: ListView, GridView, PathView
Utilities: Connection, Loader, Timer, WorkerScript, Path(Line/Quad/Cubic/Attribute/etc)
Animations: Property, Number, Vector3d, Color, Rotation, Parent, Anchor
Models: ListModel, ListElement, XmlListModel, etc
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We lack time to cover it all...
QML: 101
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The end?
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The end?
Not really...
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To be continued...
