/*
	Name:		Chris Johnson
			johnson@dcs.gla.ac.uk
		
	Last modified:	4/1/99
		
	Description:	
	This applet lays out buttons and labels to form a timetable.   It is 
	part of exercise 2 from the user interface design in Java course on:
			
		http://www.dcs.gla.ac.uk/~johnson/teaching/hci-java
			
	It uses the NewGridBagLayout class designed by G.W. Rouse in 
	An Introduction to Data Structures and Algorithms with Java, 
	Prentice Hall, Hemel Hemstead, 1998. pp 65-78.   The details
	of this class will be introduced in later practicals - it provides
	a useful means of minimising the initial complexity in developing
	an AWT interface.
*/

import java.applet.*;		// you should have met this before
import java.net.*;

import java.awt.*;				// link to the AWT classes		

import NewGridBagLayout;		// we will learn more about layout managers in later practicals


public class TimetableButtons extends Applet {
	
// Panels are components that can contain other components, such as labels.
// we will use a panel to contain the labels that make up the timetable.
		
	private Panel timetable = new Panel();
	
	
// The following lines provide access to a customised layout manager.   This provides
// a quick means of placing labels in particular positions on the screen.

	NewGridBagLayout layout = new NewGridBagLayout();
	

/* Note
 We now have to declare the interface objects outside of the init() method
 because we want to interact with the buttons later on...
*/
	
	Button UID_slot1 = new Button("UID1");  // create new buttons
	Button UID_slot2 = new Button("UID2");  
	Button UID_tutorial = new Button("UID tutorial");  

	Label Time_0900 = new Label("09.00");  // create new labels
    	Label Time_1000 = new Label("10.00");
    	Label Time_1100 = new Label("11.00");
    	Label Time_1200 = new Label("12.00");
    	Label Time_1300 = new Label("13.00");
    	Label Time_1400 = new Label("14.00");
    	Label Time_1500 = new Label("15.00");
    	Label Time_1600 = new Label("16.00");
    	Label Time_1700 = new Label("17.00");
	Label Time_1800 = new Label("18.00");
        

        Label Monday = new Label("Monday", Label.RIGHT);
        Label Tuesday = new Label("Tuesday", Label.RIGHT);
        Label Wednesday = new Label("Wednesday", Label.RIGHT);
        Label Thursday = new Label("Thursday", Label.RIGHT);
        Label Friday = new Label("Friday", Label.RIGHT);
        
    public void init() {
    	
        timetable.setLayout(layout); // set up the layout manager
				
	/*These calls add the labels at appropriate places on the screen.
        The first parameter is the name of the label component to be added eg Time_0900
        The second parameter is the panel component that holds all of the label components
        The third and fourth parameters sets the X and Y coordinates of the label
        The fifth and sixth parameters sets width and height of the label */
        
  	layout.setPositionSizeAdd(Time_0900, timetable, 1, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1000, timetable, 2, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1100, timetable, 3, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1200, timetable, 4, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1300, timetable, 5, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1400, timetable, 6, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1500, timetable, 7, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1600, timetable, 8, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1700, timetable, 9, 1, 1, 1);
  	layout.setPositionSizeAdd(Time_1800, timetable, 10, 1, 1, 1);
  	
	layout.setPositionSizeAdd(Monday, 	timetable, 0, 3, 1, 1);
        layout.setPositionSizeAdd(Tuesday, 	timetable, 0, 4, 1, 1);
        layout.setPositionSizeAdd(Wednesday,timetable, 0, 5, 1, 1);
        layout.setPositionSizeAdd(Thursday, timetable, 0, 6, 1, 1);
        layout.setPositionSizeAdd(Friday, 	timetable, 0, 7, 1, 1);
        
        layout.setPositionSizeAdd(UID_slot1, timetable, 2, 4, 1, 1);
        layout.setPositionSizeAdd(UID_slot2, timetable, 2, 6, 1, 1);
        layout.setPositionSizeAdd(UID_tutorial, timetable, 8, 4, 3, 1); 
        
        add(timetable);
        
        validate();  
        
    }
    
    public boolean action (Event event, Object what) {
/* This implements an event handler to call the specified web page whenever a particular
   button is selected.   If you add more buttons to the page then you will have to
   introduce further conditions in the if-statement.   Just copy the lines up the
   "end of UID if-case" but alter the URL to point to the relevant lecturer/course
   home page
*/

    	if((event.target== UID_slot1) || (event.target== UID_slot2) || 
    		(event.target== UID_tutorial))
    	{
    		try
    		{
    			URL UID_home = new URL("http://www.dcs.gla.ac.uk/~johnson/teaching/hci-java");
    			getAppletContext().showDocument(UID_home);
    		} catch (Exception e)
    		{
    			showStatus("Error " + e);
    		}
    	} // end of UID if-case

    	return true;
    }
}