Win a copy of Escape Velocity: Better Metrics for Agile Teams this week in the Agile and Other Processes 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 Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Liutauras Vilda
  • Tim Cooke
  • Paul Clapham
  • Jeanne Boyarsky
Sheriffs:
  • Ron McLeod
  • Frank Carver
  • Junilu Lacar
Saloon Keepers:
  • Stephan van Hulst
  • Tim Moores
  • Tim Holloway
  • Al Hobbs
  • Carey Brown
Bartenders:
  • Piet Souris
  • Frits Walraven
  • fred rosenberger

GridLayout question

 
Ranch Hand
Posts: 417
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
setLayout with GridLayout
there are 4 components.
only when i do GridLayout(1,x) or (4,x) the orders
are obeyed ie in first case it gives 1 row and in the
second case it gives 4 rows, and (2,x) gives two rows
layout.
doing GridLayout(3,x) gives 2 rows layout. it just
does not give 3 rows. why ?
(also is GridBagLayout in the exam syllabus ? what are we supposed to know on this for the exam ?)
 
High Plains Drifter
Posts: 7289
Netbeans IDE VI Editor
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
GridLayout has some surprising behavior when you don't use every row you specify. The condition that arises when you specify more rows than you will use is "handled" but probably not a result you hope for; that's where the fun starts.
Here's an example that allocates a 3x3 layout but only adds four buttons. Run it and see what happens. Then, comment out add(b4), and run it again. See if you can infer a rule for what's going on.

Funky, huh?
------------------
Michael Ernest, co-author of: The Complete Java 2 Certification Study Guide
 
Ranch Hand
Posts: 2120
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hello Michael.
I have been playing with your code for a while and these are my conclusions. Please confirm o deny.
If we are adding fewer elements that those specified by the "grid" formed by the arguments to the constructor of the Gridlayout there are two cases:
a)We are also adding fewer (or the same) elements than those especified as the argument for the rows: only one column is formed.
b)We are adding more elements than the argument for the rows: the grid especified by the arguments is formed with blank spaces where no element habits. This blank space is also kept whe resizing the GridLaout window. An attempt for making the most columns is made, but never two adjacents columns will have a difference of cells greater than one.

 
The glass is neither half full or half empty. It is too big. But this tiny ad is just right:
Garden Master Course kickstarter
https://coderanch.com/t/754577/Garden-Master-kickstarter
reply
    Bookmark Topic Watch Topic
  • New Topic