Michael, This is how I would do it.
https://gist.github.com/2626655 I would create a signal on the project properties dialog that gets emitted when the scale change, which you then connect to a slot in the scale edit object in qgisapp.cpp. Once the signal fires you read the new scales from where every they are stored into the scale bar widget. - Nathan On Mon, May 7, 2012 at 6:03 PM, kimaidou <kimai...@gmail.com> wrote: > Hi devs, > > I would like to learn C++ and understand Qgis code organisation, in order > to participate in making a better Qgis. This is why I am trying to propose > a simple new feature : in the project properties dialog, let the user > choose the scales he vould like to use for the current project. Then, use > these scales to replace the predefined scales in the status bar scales > list. The next step would be to optionnaly force Qgis to stick to these > scales when zooming in/out/extent, etc. > > I have already coded the "project properties dialog" part : manage a list > of scales, with add/delete buttons, and read/save in the project xml file. > Now I need to interact with the scale list, wich is normally added by > src/app/qgisapp.cpp by the method > QgisApp::createStatusBar() > > The scale list is creating using the class QgsScaleComboBox : > mScaleEdit = new QgsScaleComboBox( statusBar() ); > > Now, I need som help. I tried to access the scale list directly using > QgisApp::instance()->statusBar() , but with no success. > I think what I should do is to add a method > QgsScaleComboBox::update(QStringList) in qgsscalecombobox.cpp which change > the content of the list. But then, how can I access this method from > qgsprojectproperties.cpp ? > > Thanks in advance > > Michael > > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer > >
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