This week's book giveaway is in the Cloud/Virtualization forum.
We're giving away four copies of Learning OpenStack Networking: Build a solid foundation in virtual networking technologies for OpenStack-based clouds and have James Denton on-line!
See this thread for details.
Win a copy of Learning OpenStack Networking: Build a solid foundation in virtual networking technologies for OpenStack-based clouds this week in the Cloud/Virtualization forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Liutauras Vilda
  • Campbell Ritchie
  • Tim Cooke
  • Bear Bibeault
  • Devaka Cooray
Sheriffs:
  • Jeanne Boyarsky
  • Knute Snortum
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Ganesh Patekar
  • Stephan van Hulst
  • Pete Letkeman
  • Carey Brown
Bartenders:
  • Tim Holloway
  • Ron McLeod
  • Vijitha Kumara

Move items up or down in List?  RSS feed

 
Greenhorn
Posts: 9
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I am trying to move items in a List (on 1.0) up or down. I thought of the code below, but it doesn't work.
else if (t == up) {
String goingDownItem = topList.getItem(topList.getSelectedIndex() - 1);
String goingUpItem = topList.getItem(topList.getSelectedIndex());
topList.replaceItem(goingDownItem, topList.getSelectedIndex());
topList.replaceItem(goingUpItem, topList.getSelectedIndex() - 1);
topList.select(topList.getSelectedIndex() - 1);
return true;
}
else if (t == down) {
String goingDownItem = topList.getItem(topList.getSelectedIndex());
String goingUpItem = topList.getItem(topList.getSelectedIndex() + 1);
topList.replaceItem(goingUpItem, topList.getSelectedIndex());
topList.replaceItem(goingDownItem, topList.getSelectedIndex() + 1);
topList.select(topList.getSelectedIndex() + 1);
return true;
}
where t is the event's target.
The idea is that the text of the selected item, and the text of the item item above it (for moving up) or below it (for moving down) are put into Strings, then they are replaced with each other. I get a lot of strange effects with items not moving, staying the same, moving to the top of the list, etc.
 
It is sorta covered in the JavaRanch Style Guide.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!