class DataItem; partially implemented abstract base class of hierarchy; defines data members for common data elements; provides common functionality;
class PictureDataItem; concrete class for Image based data items;
class SoundDataItem; concrete class for Sound based data items;
class TextDataItem; concrete class for Text based data items;

Tracer statements.
Can you incorporate tracer statements in a the methods of the classes that you write.

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For more information theres a readme.txt

The main Java framework code is supplied, I need help!!!!!!!!! to implement the DataItem hierarchy.

A2.java
Driver program.

Creates the other elements, displays GUI.

Run:

java A2 data.txt

where data.txt is data file with text defining the background picture and the various data items.

A2Control.java

Code that deals with user inputs via mouse (mouse motions and mouse clicks). These results in calls to A2Model where
check if mouse in an active region and respond appropriately.

A2Display.java

A very simple GUI - canvas in scrollpane (AWT library).

A2Model.java

The data! An instance of this class will own an image (the background image for the display) and a collection of data items.
It has an input function that reads the lines in the data file that specify the type of the next data item; the appropriate item is created (Java 'reflection' style) and told to read its data. The input function builds the collection of items. The other functions
in this class perform tasks like checking whether a data item has been clicked, and choosing an appropriate cursor.

CursorCollection.java

Code to create cursors from GIF images and make these available by name.

DataItem.java

Uhm - well actually you have to write this; this "code" is fragmentary.

MyCanvas.java

Display area linked to underlying data - arranges that data is drawn at appropriate times. (Here, the data is just the
background image)

PictureDialog.java

See TextDialog, but this is for pictures

TextDialog.java

Intended for use from the display function in TextDataItem Constructor takes reference to "frame", a title, and a Vectorcollection of text; should create a new TextDialog, make it visible,
it will display until its window closed.

images/

Directory with a few "GIF" images that could be used for cursors Also a place to put own images

sounds/

Place to put sound files

data.txt

Dummy file providing some suggestion as to form of a data file

cursors.txt

File with names and references to cursor gif files

Attachment:- brainmass.zip