Some issues with porting KDE4 plasmoid to Plasma5

[Evgeniy Alekseev]

At Tuesday 25 November 2014 10:23:37 Marco Martin wrote:
> On Sunday 16 November 2014, Evgeniy Alekseev wrote:
> > Hello,
> > 
> > Some time ago I've started a porting of my plasmoids and dataengines to
> > the
> > newest Plasma and found some problems with it. I've ported a DataEngine
> > w\o
> > any problem, but I have issues about a Plasmoid. I've read API reference
> > and look at examples from plasma-next and didn't find solutions.
> > 
> > First of all I want say that I don't plan to use QML/JS now and plan to
> > develop of my plasmoids in pure C++. Firstly it is related to other
> > project
> 
> in Plasma5 pure C++ plasmoids are not possible anymore, the c++ api was for
> QGraphicsView (since plasma was based on top of it) plasma5 is based on top
> of scene graph, so the only way to write an UI is trough QML.
> You can still use C++ in a dataengine or a private QML import.
> 
> > parts which is in C++/Qt and I don't want to use additional languages w\o
> > any special necessity. Also as far as I understand the core plasmoid part
> > (on which I have issue too) still shoul be written in C++. Also I try to
> > avoid using deprecated functions.
> > 
> > My questions are:
> > 
> > 1. Is there any alternative to Plasma::PopupApplet? If there is not, is
> > there a plan to implement it?
> 
> all applets are popupapplets now.
> see
> http://notmart.org/blog/2014/02/making-plasmoids-qml-api-better/
> 
> especially the section "Compact and full representations"
> 
> > 2. Is there a possibility to paint complex UI w\o using QML (in C++ code)?
> > For example, I didn't find old Applet::setLayout() and
> > PopupApplet::setWidget() methods.
> 
> no, only QML is allowed, and subclassing Applet doesn't really work anymore.
> If you have a complex QWidget ui in theory you could still have it by
> implementing it in a QML import, then making ti show from a slot invoked by
> qml.
> 
> > 3. How can I connect DataEngine to my Plasmoid? The old method which I
> > used
> > was dataEnigne(), some new applets use this method too, but it doesn't
> > exist in the newest Plasma headers. Some new widgets such as nm-applet use
> > Plasma::DataEngineManager::self()->engine() constuction, but
> > Plasma::DataEngineManager class doesn't exist in the Plasma too =(
> 
> see the QML bindings:
> https://techbase.kde.org/Development/Tutorials/Plasma2/QML2/API#Data_Engines

Thank you for the answer and the links! 

Seems all my questions are QML porting retaled, so I'll look on it and hope 
will port own KDE stuff successfully =) Thank you again.
-- 
Sincerely yours,
Evgeniy Alekseev

email: darkarcanis at mail.ru
ICQ: 407-398-235
Jabber: arcanis at jabber.ru
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