[Development] Question about Qt's future

[Sze Howe Koh]

On 23 April 2014 22:50, Sze Howe Koh <szehowe.koh at gmail.com> wrote:
> Hi Marius,
>
> On 23 April 2014 20:14, cincirin <cincirin at gmail.com> wrote:
>> Sorry for re-open this topic, but as someone else already pointed out,
>> what do you think about the Unreal engine guys to abandon the unreal
>> script which was used until now for many years ?
>> To quote some comments:
>> "In the past, gameplay code existed in UnrealScript. UnrealScript is the
>> scripting language which forms the core of current community mods, and
>> much of the gameplay code of all previous Unreal Engine titles.
>> However, UnrealScript is being removed.
>> In its place, the engine will be 100% C++, and highly optimized."
>
> I think UnrealScript and QML have different use cases.
>
> UnrealScript was for _all_ the code: GUI and core logic. The article
> says it was replaced because C++ gives better logic performance. I
> think that makes sense, because games need to run complex code.

I just read http://gameindustry.about.com/od/trends/a/Unreal-Engine-4-First-Look.htm
in more detail. Another big benefit they described is: "Programmers
can click on a property and edit the C++ code directly, with no
rebuild time required."

QML offers this for GUIs. No need to compile, just edit your .qml file
and restart your app.


> With QML, the general idea is to use QML for the GUI and use C++ for core logic.
>
> Also, UnrealScript and C++ are imperative languages which are
> well-suited for writing instructions. QML is a declarative language
> (like HTML/CSS), which is well-suited for writing GUIs. It's a good
> idea to choose the best tool for any job.
>
>
>> Also I'm curios why Android xml files are good for design the UI, but
>> "old" QtDesigner ui (xml) files seems to be deprecated in favor of qml.
>
> Which of the following do you prefer?
>
> //================================================
> // Android XML
> // http://developer.android.com/guide/topics/ui/declaring-layout.html
> //================================================
>
>     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
>                   android:layout_width="fill_parent"
>                   android:layout_height="fill_parent"
>                   android:orientation="vertical" >
>         <TextView android:id="@+id/text"
>                  android:layout_width="wrap_content"
>                  android:layout_height="wrap_content"
>                  android:text="I am a TextView" />
>        <Button android:id="@+id/button"
>                android:layout_width="wrap_content"
>                android:layout_height="wrap_content"
>                android:text="I am a Button" />
>     </LinearLayout>
>
> //================================================
> // QML
> // Don't need "wrap_content", because it's default behaviour
> //================================================
>
>     ColumnLayout {
>         anchors.fill: parent
>         TextEdit {
>             id: textEdit
>             text: "I am a TextEdit"
>         }
>         Button {
>             id: button
>             text: "I am a Button"
>         }
>     }
>
>
>> Best regards,
>>    Marius
>
> Regards,
> Sze-Howe