I am new to java and I think the project I chose to teach myself was maybe a little on the ambitious side.
In essence I have 2 classes, say, Class A and Class B that are defined at the same level (i hope that makes sense)
Class A contains a linked list of instances of Class B.
Some behaviours defined in Class B need to effect or be effected by the state of the other instances of Class B in the LinkedList
An instance of Class B may receive an event that means it needs to remove it self from the list, or change the position relative to the other Class B instances .
How do i reference the other members of the linked list, How do i reference anything in the instance of Class A which contains the instance of Class B recieving the mouse event?
A brief explanation of what I am trying to achieve follows.
You can think of the main form as being, say, a drafting table.
Conceptually I want to be able to add, remove, move and resize 'sheets of paper' on the drafting table and on each sheet of paper I want to be able to add, remove, move and resize shapes. These shapes could be to represent different elements of a flow chart, or electrical components in an electronic circuit, etc. The shapes should not be allowed to overlap.
For the 'sheets of paper' I have a class based on a JPanel, that handles its own resizing etc. The 'shapes' are also a class based on JPanel that handle their own resizing.
The main form or (drafting table) has a linked list of instances of 'sheet' class and each instance of 'sheet' class has a linked list of instances of 'shape' class.
Now when I want to add a shape, the instance of the 'sheet' class handles the mouse click and runs through its linked list of 'shape' class instances to see if this is a valid location, ie is does not overlap another 'shape'. If it is a valid location it adds it to the linked list.
What I am having trouble with is when i resize or move a 'shape'. the mouse event is handled in the 'shapes' class but I don not know how to check the other 'shape' class instances to see if the new location or size is valid.
thanks in advance for any help,