Add notify signals to some QCoreApplication properties

The various string properties are good candidates for exposure to QML.
While QCoreApplication itself is unlikely to be exposed to QML directly,
a wrapper exposure also needs these signals in order to react to changes
from QCoreApplication.

Change-Id: I266da6010f1c9300de4bb5e7775a0bdacab7f26c
Reviewed-by: Richard J. Moore <rich@kde.org>
Add QDBusReply::error() const.

The accessor was missing.

Task-number: QTBUG-29917
Change-Id: Ie6759a1120bc9ed6550c271df35f276e15b4eb79
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
OpenGL: Add support for OpenGL 4 tessellation shader stages

This adds support for OpenGL 4 tessellation shader stages to
QOpenGLShaderProgram and QOpenGLShader.

Change-Id: Iefb2f411e00767990d54670c5d39413be694dd66
Reviewed-by: James Turner <james.turner@kdab.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Add .device.vars to .gitignore.

Change-Id: Ia119a33faa6e0e84cb8a002e2ee9f9a745d31f1c
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Clean up manual test to QGraphicsView (rubberband)

This cleans a bit up in the manual test by
a) Removing a weird reference alloration (and replace . with ->)
b) rename for variable from v (which was also the view name) to n.
c) remove a big item in the scene rect that is irrelevant to the test

Change-Id: I49cb319bcc2f4bceef0c96ca86b571b0240a9a92
Reviewed-by: Andreas Aardal Hanssen <andreas@hanssen.name>
QOpenGLShaderProgram: insert precision defines based on runtime detection

Given that we can create OpenGL/ES contexts even under a Desktop OpenGL
implementation, we must check the type of the surface we're renderering
on at runtime.

Change-Id: I55004ce918889b3fc094702976500fcfc675bd1a
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>