Updating to Qt 5.12 / Qt Creator 4.8

[e8johan]

This is work in progress - do not merge!

The plan is to update the entire contents for Qt 5.12 (which is an LTS) and Qt Creator 4.7. The current checklist follows below. Notice that these are my own notes. Please ask if something is unclear to you.

General

• Update import statements to latest version
• Re-grab all screenshots (with shorty)
• Run all examples
• Validate all on-line resources (jpl, flickr)

Planned Changes

• Chapter 1.3 - update available modules
• Chapter 1.4 - mentions of DIGIA
• Chapter 2.2 - "Qt Quick UI"
• Chapter 2.2 - Building from Scratch is outdated
• Chapter 3 - Revisit with new Qt Creator (screenshots + text)
• Chapter 4.1 - QtQuick 2.0, should be latest version
• Chapter 6, ObjectModel and ListModel with functions
• Chapter 10, native playlist support, audio roles support
• Chapter 11.6 - OAuth
• New chapter, QtQuick.Shapes

New stuff based on changelogs

(below is captured in the planned changes above)
(did not look at changelogs from gitorious days, nor bug fix releases)

5.5

• Q_GADGET visible frm JS
• BorderImage handles @2x HiDPI border images
• Camera - more exposure modes

5.6

• ObjectModel (gt, append, insert, move and remove)
• qml tool (instead of qmlviewer)
• JIT
• removed installTranslatorFunctions (see installExtensions)
• QQmlComponent PreferSynchronous
• padding, leftPadding, etc to Text, TextInput, TextEdit
• Item::layer.textureMirroring, ShaderEffect::textureMirroring
• Flippable now has an enabled property
• TextEdit, editingFinished signal
• QtQuick.Particles, now Turbulence noise source image works from QRC files
• GraphicalEffects, When defining blur based effects, like Glow, DropShadow and GaussianBlur, prefer to specify 'samples' to be an odd number and let radius be the default. This gives the best effect. Animate the blur by animating 'radius' from 0 to floor(samples/2). Using a 'radius' which is higher than samples/2 will result in artifacts.
• QtMultimedia, audio role API
• QtMultimedia, playlist support

5.7

• PathView, movementDirection controls which direction items move in when setting currentIndex.
• QtMultimedia, Playlist in qmlviewer

5.8

• Compiled and cached .qmlc/.jsc created by the QML engine.
• Shader code can be in files instead of inside the QML
• Binding has delayed property

5.9

• nothing?

5.10

• QtQuick.Shapes

5.11

• import with same minor as Qt, e.g. import QtQuick.Window 2.11 to reduce confusion
• Qt Quick Compiler replaced
• ListModel, can assign function declarations to ListElements => models with actions.

5.12

• TableView - covered in Adding TableView section #212
• Input Handlers (https://doc-snapshots.qt.io/qt5-dev/qtquickhandlers-index.html)

[mitchcurtis]

• TableView is new in 5.12 in Qt Quick.
• Input Handlers are new in 5.12 I think (https://doc-snapshots.qt.io/qt5-dev/qtquickhandlers-index.html).

[tpyssysa]

Looks more 5.12/4.7 compatible now.