Marble/ModelView
ModelView framework in Marble
Marble uses Qt's Model/View framework as a way to signal updates in a model to interested parts. In that respect, a Model class can wrap any possible data.
Here is the list of Model classes, and a description of how they are used.
QAbstractItemModel
It represents the tree of GeoDataObject elements corresponding to a GeoDataDocument.
It is used by the DataViewPlugin debug plugin (and is broken atm).
It represents a list of gpx data files represented as GpxFile
This was originally intended to but used as the model for the File List View ( which is accessible by running marble with --enableFileView ) but has since been replaced by the FileViewModel.
The model is used as a member in the GpsLayer to hold the list of gpx files as a collection class and is deprecated. This, along with the whole current GPX implementation, needs to be removed and updated to the current concepts in Marble. See Gpx Status
It represents the GeoDataGeometry and the GeoDataFeature items of the last opened GeoDataDocument.
It is used by the GeoRenderPlugin to access the list of vector data and draw it.
QAbstractListModel
It represents the list of opened files. The FileManager signals it about the documents it opens or closes.
It is used by the FileViewFloatItem and by a List widget in the MarbleControlBox.
It represents a list of GeoDataDocuments. Only the PlacemarksPlugin uses it.
It is used by no other code.
It represents a list of Placemarks.
The PlaceMarkManager appends all the placemarks contained in the GeoDataDocument it knows about in its instance.
The MarbleRunnerManager appends the list of placemarks that the Runners found in its instance.
It is used by the MarbleControlBox to provide a list of placemarks (either from the PlacemarkManager or from the MarbleRunnerManager).
It is also used by the PlacemarkLayout to determine layouting on the map.