Re: [Interest] [Development] [Announce] Qt 5.6.0 RC released

[mark diener]

Hello List:

Anybody running OSX El Capitan 10.11 with Qt 5.6.0 RC and IOS 9.2 and
Xcode 7.2 and able to successfully debug under IOS Simulator?

https://bugreports.qt.io/browse/QTCREATORBUG-15705

Any comments appreciated,

md

On Tue, Feb 23, 2016 at 11:41 PM, List for announcements regarding Qt
releases and development  wrote:
> Hi all,
>
>
>
> Qt 5.6.0 RC is now released, see
> http://blog.qt.io/blog/2016/02/23/qt-5-6-0-release-candidate-available/
>
>
>
> Big thanks to everyone involved!
>
>
> Best regards,
>
> Jani Heikkinen
>
> Release Manager | The Qt Company
>
>
>
> The Qt Company / Digia Finland Ltd, Elektroniikkatie 10, 90590 Oulu, Finland
>
> www.qt.io |Qt Blog: http://blog.qt.digia.com/ | Twitter: @QtbyDigia,
> @Qtproject Facebook: www.facebook.com/qt
>
>
>
>
>
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Re: [Interest] QJSEngine replacement for QScriptEngine misses newFunction

[Walter Stefan]

Thanks Stephen!
I found a solution, which is very similar to your approach.

QJSValue myExt = m_engine->newQObject(new ScriptModuleMath());
// mount the whole class ScriptModule to the engine --> Math.sqrt(4)
m_engine->globalObject().setProperty("Math", myExt);
// mount only the sqrt function to the engine --> sqrt(4)
m_engine->globalObject().setProperty("sqrt", myExt.property("sqrt"));

the first mount allows me now to access the whole object and of course my 
sqrt() method.
i.e. Math.sqrt(4);

the second mount allows me to directly access the sqrt() method without the 
instance.
i.e. sqrt(4);

Thanks for your suggestion.

Best Regards,
Stefan

-Original Message-
From: Interest [mailto:interest-bounces+stefan.walter=lisec@qt-project.org] 
On Behalf Of Stephen Bryant
Sent: Dienstag, 23. Februar 2016 15:12
To: interest@qt-project.org
Subject: Re: [Interest] QJSEngine replacement for QScriptEngine misses 
newFunction

Hi Stefan,

On Tuesday 23 February 2016 05:34:03 Walter Stefan wrote:
[...]
> 
> And in this way. I can use it then in the script:
> value = sqrt(4);
> 
> I actually don't want to map a whole QObject, because that would 
> require a call like this: value = MyMath.sqrt(4);
> 
> Is there any way to achive in QJSEngine the same result as I do within 
> the QScriptEngine?


Is far as I know, the only way is to do the thing you don't want to: map the 
whole QObject.  You can, however, add a JS function reference inside the engine 
so you can call the function without the object name.

QJSEngine engine;
engine.globalObject().setProperty(
  "MyMath",
  engine.newQObject( new ScriptModuleMath(  ) ) ); engine.evaluate( "var 
sqrt=MyMath.sqrt;" );  // repeat for other functions

This will now work in JS:  value = sqrt(4);

You'll presumably be aware that all public slots of MyMath will automatically 
be available as JS functions.  That makes things a little easier.

It seems that you also need a QObject instance, event if you only want to 
expose static methods.

BTW: your C++ native function can use this signature: double sqrt(double); 
You'll get NaN if somebody calls it with a non-number.  The return value is 
also automatically converted as there is a QJSValue constructor that takes a 
double.


There's no direct equivalent of read-only/undeletable, unfortunately.  I'm 
missing that too.  The closest you can get is that your MyMath functions can't 
be altered from JS, and you can also make a read-only Q_PROPERTY.

However, there is nothing stopping somebody from reassigning properties of the 
global object - so your 'sqrt' function and 'MyMath' object could be replaced.  
This may be a security concern, depending on what you're doing.


Best regards,

Steve
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Re: [Interest] Has some examples about new version qt3d (5.5 or later) to operate 3d model mesh and sub mesh?

[Jordon Wu]

Hi Sean,

This is a cool 3d demo(https://www.youtube.com/watch?v=zCBESbHSR1k )!

Is this demo using assimp to load 3d model or using gltf to load 3d model ?

BTW, Are you open this demo source code to public? Thanks

Best Regards
Jordon Wu

2016-02-23 15:58 GMT+08:00 Sean Harmer :

> Hi,
>
> On 23/02/2016 07:04, Jordon Wu wrote:
>
> Hi list all,
>
> I'm begin study qt3d(qt5.5 version) now. And I want to found some examples
> about 3d model mesh and sub mesh operation.
>
> I google found a good example QtQuick3D Tutorial - Car3D (
> http://www.youtube.com/watch?v=VvQ_NHKtHwE ), but this qt3d is V1.0  and
> the example did not run on qt3d 5.5 or later.
>
> Has anyone know where could found example about qt3d to operate 3d model
> mesh and sub mesh like above Car3D examples ? Thanks
>
>
> Well, in making of this car demo,
> https://www.youtube.com/watch?v=zCBESbHSR1k we simply exported the
> submeshes we needed explicit control over as separate obj files and loaded
> each one usign a Mesh component aggregated to an Entity. Each Entity has
> it's own Transform component that we then bind properties to QML
> expressions that reference the Qt Quick Controls, e.g. slider values or
> boolean switches.
>
> You can also have all meshes in a single OBJ file and reference the sub
> mesh you wish to render in the Mesh component. We tried this but found it
> to be better to split them out as it allows more work to be done in
> parallel at start up, leading to faster startup times.
>
> Cheers,
>
> Sean
>
>
>
> Best Regards
>
> Jordon Wu
>
>
>
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[Interest] QML Keys Shock

[mark diener]

Hello List:

I went to deploy a test app on Android and IOS that would test processing
handling keys as they were entered into TextInput QML.

Shockingly, the Keys.onPressed is NOT called for normal letters on
either Android
or IOS.

Keys, like Back(delete) and Enter do trigger events, but forget about
implementing
PER keystroke logic on Android/IOS.

Some bug tracker dialogue between Eskil Abrahamsen Blomfeldt kind of
confirms this.

Maybe the documentation for QML Keys should be updated to let people
know that very FEW of the keys on the soft keyboard actually trigger
onPressed events.

Can someone tell me I am making a mistake and somehow ALL the keyboard
keys like letters and space are triggered on Android and IOS soft
keyboards  if I only make some manifest.xml or info.plist entry!

Cheers,

marco
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[Interest] Qt3D SceneLoader and TechniqueFilter

[Unai IRIGOYEN]

Hi,
I import some objects into my scene via qgltf tool from project file and they 
are correctly rendered with Qt3D native materials (-S option) into the scene.
Now, I want to add a technique to the default material effect to alter visual 
appearance of the objects without defining a whole new material (keeping 
default material parameters intact and just inject more parameters and change 
shaders).
For this I recursively add a technique to the material effect of each entity of 
the loaded objects. However, the renderer (altered forward renderer) keeps 
using the default material despite the annotation I set on the technique 
(renderingStyle: myforward) and the TechniqueFilter I put on the framegraph 
matching the annotation. If instead of adding the technique I replace the 
previous ones by removing them prior to addition, the right technique is used 
but I lose the ability to filter to the previous technique.

Now my questions are: 
How does TechniqueFilter process annotations in order to get the right one? 
What am I doing wrong?
In case of multiple annotations in TechniqueFilter, do it have to match all 
annotations or one of the provided ones?
In case of multiple annotations on Technique, does the TechniqueFilter have to 
match one of them or all of them?

As a side note, RenderPassFilter seems to filter properly, at least with a 
single annotation.

Thank you for your help.
-- 


Unai IRIGOYEN

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Re: [Interest] Behaviour difference between Qt Version 5.4-0 and 5.5.1

[Thiago Macieira]

On terça-feira, 23 de fevereiro de 2016 08:38:02 PST Günter Michel wrote:
> Is this a bug? Do yo know a workaround ?

It's known and fixed with commit 02f70004c266f4c35f098f49cfb3ca0284e28cac 
("Allow socket events processing with a foreign event loop on Windows"), which 
fixes bugs QTBUG-49782 and QTBUG-48901.

That commit is in 5.6 after the beta. Please upgrade to the 5.6 RC.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center

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Re: [Interest] QJSEngine replacement for QScriptEngine misses newFunction

[nikita baryshnikov]

As a workaround you can use QQmlContext::setContextObject:

QQmlEngine::rootContext()->setContextObject(myMath);

On Tue, Feb 23, 2016 at 2:11 PM, Stephen Bryant  wrote:
> Hi Stefan,
>
> On Tuesday 23 February 2016 05:34:03 Walter Stefan wrote:
> [...]
>>
>> And in this way. I can use it then in the script:
>> value = sqrt(4);
>>
>> I actually don't want to map a whole QObject, because that would require a
>> call like this: value = MyMath.sqrt(4);
>>
>> Is there any way to achive in QJSEngine the same result as I do within the
>> QScriptEngine?
>
>
> Is far as I know, the only way is to do the thing you don't want to: map the
> whole QObject.  You can, however, add a JS function reference inside the
> engine so you can call the function without the object name.
>
> QJSEngine engine;
> engine.globalObject().setProperty(
>   "MyMath",
>   engine.newQObject( new ScriptModuleMath(  ) )
> );
> engine.evaluate( "var sqrt=MyMath.sqrt;" );  // repeat for other functions
>
> This will now work in JS:  value = sqrt(4);
>
> You'll presumably be aware that all public slots of MyMath will automatically
> be available as JS functions.  That makes things a little easier.
>
> It seems that you also need a QObject instance, event if you only want to
> expose static methods.
>
> BTW: your C++ native function can use this signature: double sqrt(double);
> You'll get NaN if somebody calls it with a non-number.  The return value is
> also automatically converted as there is a QJSValue constructor that takes a
> double.
>
>
> There's no direct equivalent of read-only/undeletable, unfortunately.  I'm
> missing that too.  The closest you can get is that your MyMath functions can't
> be altered from JS, and you can also make a read-only Q_PROPERTY.
>
> However, there is nothing stopping somebody from reassigning properties of the
> global object - so your 'sqrt' function and 'MyMath' object could be replaced.
> This may be a security concern, depending on what you're doing.
>
>
> Best regards,
>
> Steve
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Re: [Interest] QJSEngine replacement for QScriptEngine misses newFunction

[Stephen Bryant]

Hi Stefan,

On Tuesday 23 February 2016 05:34:03 Walter Stefan wrote:
[...]
> 
> And in this way. I can use it then in the script:
> value = sqrt(4);
> 
> I actually don't want to map a whole QObject, because that would require a
> call like this: value = MyMath.sqrt(4);
> 
> Is there any way to achive in QJSEngine the same result as I do within the
> QScriptEngine?


Is far as I know, the only way is to do the thing you don't want to: map the 
whole QObject.  You can, however, add a JS function reference inside the 
engine so you can call the function without the object name.

QJSEngine engine;
engine.globalObject().setProperty(
  "MyMath",
  engine.newQObject( new ScriptModuleMath(  ) )
);
engine.evaluate( "var sqrt=MyMath.sqrt;" );  // repeat for other functions

This will now work in JS:  value = sqrt(4);

You'll presumably be aware that all public slots of MyMath will automatically 
be available as JS functions.  That makes things a little easier.

It seems that you also need a QObject instance, event if you only want to 
expose static methods.

BTW: your C++ native function can use this signature: double sqrt(double);
You'll get NaN if somebody calls it with a non-number.  The return value is 
also automatically converted as there is a QJSValue constructor that takes a 
double.


There's no direct equivalent of read-only/undeletable, unfortunately.  I'm 
missing that too.  The closest you can get is that your MyMath functions can't 
be altered from JS, and you can also make a read-only Q_PROPERTY.

However, there is nothing stopping somebody from reassigning properties of the 
global object - so your 'sqrt' function and 'MyMath' object could be replaced.  
This may be a security concern, depending on what you're doing.


Best regards,

Steve
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