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Re: create a GUI in java

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  To: comp.lang.java.gui
nix schrieb:
> Hi all,
> 
> I have to create a GUI in java that should have the following
> functionalities:

Hmm... I'll give you just some basic instructions.

> 1. load a map (bmp/jpg file) ) as background (ok this is the simplest task)

In fact, this are two tasks:

a) load a map
b) display it in the background

Create a subtype of JPanel (if you want to use Swing) that is able to 
this (or at least b)). You'll have to override paintComponent (Swing).

Perhaps you want to do a) as a separate task and to display some 
progress bar or something like this.

> 2. create objects on this map

Use an array in the created class (see above) to hold descriptions for 
these objects. Extend paintComponent so that the described objects are 
painted properly.

> 3. delete these objects

This is to remove the object(s) from the array and to repaint the panel.

> 4. drag &drop these objects on the map to put them in different positions

For this you'll have to extend your class a bit. First of all write a 
method that returns an object (or null) for a given point. Then 
implement MouseListener and MouseMotionListener. If the use clicks on an 
object (here you'll have to use the previous mentioned method) with the 
left mouse button, put the selected object into "some memory". Whenever 
the use drags the mouse (see MouseMotionListener#mouseDragged) update 
the object's description (perhaps followed by a repaint). Implement the 
methods that are needed to do this.

> 5. do right click on a selected object in order to set some attributes of
> the object

Use the location retrieval method mentioned above. Update the object's 
description and repaint the panel afterwards.

This should be enough to complete the task and to let you have some fun 
with it on your own.

Bye
Michael

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create a GUI in java "nix" <nix@THRWHITE.remove-dii-this> - 2011-04-27 15:26 +0000
  Re: create a GUI in java "RedGrittyBrick" <redgrittybrick@THRWHITE.remove-dii-this> - 2011-04-27 15:26 +0000
  Re: create a GUI in java "Michael Rauscher" <michael.rauscher@THRWHITE.remove-dii-this> - 2011-04-27 15:26 +0000

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