Wednesday, September 16, 2009

Mouse rocker gestures

Mouse Rocker
Based on the AutoHotKey script from Adam Pash on the Lifehacker site, I made my own version to fit my personal mouse rocker gesture needs.

Basically, a mouse rocker gesture requires that you press one mouse button, hold it down, then press the other. You can rock across the mouse from right-to-left or left-to-right; each direction you rock gives you a different result. Once you get used to this gesture, the name makes perfect sense, and you'll wonder why you weren't mouse rocking your whole life.

I changed the way the script is configured so one can now easily add process names in the rocker.ini file to change the behaviour for a specific application. And I added extra navigation combinations so one should be able to easily make it fit his own needs.
For example in excel you can now easily switch to the next or previous tabbed sheet using mouse rocker gestures. UltraEdit switching between open files is also supported by sending 'Alt + up' or 'Alt + down' keys with the mouse rocker gestures. On first run, it will now also ask if you want to start the tool automatically during windows start. The ini file is created on first run in the directory from where the rocker.exe file is launched. The different groups denote the keys that will be send when a mouse rocker gesture is detected, one can easily add or remove any process name to change the behaviour in a specific application.

No installation is required, just download the zip file, extract and run the exe. The AutoHotKey source script is included in the zip file.

Update 19/02/2011: links updated

Hibernate subquery join using Criteria

I recently needed to create max query in hibernate returning an object instead of the maximal value of the field and I wanted to do this using Hibernate Criteria in our JPA environment.
A simple example of what I wanted:
select *
from user
where userid = (select max(userid)
                from user
                where company = 'aCompanyName')

The way to program this in JPA/Hibernate using Criterias, DetachedCriteria and Subqueries. Make sure to use Subqueries.propertyEq instead of Subqueries.eq if you want to join on a field:

public User getMaxUserOfCompany(String companyName) {
Session session = (Session) em.getDelegate();
DetachedCriteria subCriteria = DetachedCriteria.forClass(User.class);
subCriteria.add(Restrictions.eq("company", companyName));
subCriteria.setProjection(Projections.max("userid") );
Criteria criteria = session.createCriteria(User.class);
criteria.add(Subqueries.propertyEq("userid", subCriteria));
return (User) criteria.uniqueResult();