[Marble-devel] Painting interactive geometric objects onto map

[Konrad Enzensberger]

Hi Tom,

i use a own layer class, drived from LayerInterface, to add geo objects 
(ellipse, rect,...)
onto the map.
To interact with this objects, use mouse events, see the RoutingLayer class,
this is a good sample how to interact with a polygone,

br, konrad

----- Original Message ----- 
From: "Tom Grope" <tom.grope at st.ovgu.de>
To: <marble-devel at kde.org>
Sent: Saturday, October 01, 2011 5:38 PM
Subject: [Marble-devel] Painting interactive geometric objects onto map


> Hi there,
>
> I'v got a "special" Problem in painting interactive geometric objects 
> (Ellipses/Retangles) onto the marble map.
>
> My task is to draw cluster (ellipses, differ in color, size,...) onto  the 
> map which i can interact (click, hover,...) with. Right now i only  draw 
> simple ellipses via Marble::Geopainter onto the map, but the  Problem is, 
> there seems no possibility to interact with these  geometric instances.
>
> I wrote a class that represents and stores my clusters and now i am 
> looking for a solution of my draw/interact-problem and i hope you can 
> help me or give me an advice. :-)
>
> I looked at the CollidingMice-Example 
> (http://doc.qt.nokia.com/stable/graphicsview-collidingmice.html#mouse-class-definition) 
> from Qt and they work there with an QGarphicsItem. Is it possible to draw 
> an inherated instance of QGarphicsItem onto the  marblemap?
>
> I also got the advice to look at GeoLineStringGraphicsItem, but is the 
> GeoLineStringGraphicsItem not only a container? o_O
>
> I hope i did not confused anybody with my problem and i'm glad for any 
> advice.
>
> So long
>
> Tom
>
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