/*
	3magic Coffee Table Tutorial 8
	Tutorial8.java - Scrolling Utilities.

	© 1997-1999 3magic.  All rights reserved worldwide.
*/

import java.awt.*;
import java.applet.*;
import java.util.*;
import java.awt.event.*;

import CoffeeTable.Grid.*;

public class Tutorial8 extends Applet implements ActionListener
{
	// Our grid.
	GridPanel fGrid;
	
	// Rows and Columns;
	int fNumCols = 100;
	int fNumRows = 500;
	
	// Some Edit Text fields.
	TextField fJumpCol = new TextField("Col");
	TextField fJumpRow = new TextField("Row");
	
	// Some Buttons.
	int fNumButtons = 3;
	Button fButton[] = new Button[fNumButtons];
	String buttonLabels[] = {
		"Jump To Cell", "Jump To Col", "Jump To Row"};

	// Message area.
	Label fMsg = new Label("Enter a column and row and press one of the buttons.");
	
	/**
	 * Initialize.
	 */
	public void init() {
		// Let's use a BorderLayout to help us with the user input areas.
		setLayout(new BorderLayout());

		// Instantiate a new Grid Panel with the specified rows and columns 
		// and other defaults like cell selection, row and column headers, 
		// row and column lines enabled and with scrollbars.
		fGrid = new GridPanel(fNumRows, fNumCols);
		
		// Add in the DEMO_TEXT mode.
		fGrid.setFlags(fGrid.getFlags() | GridPanel.DEMO_TEXT);
		
		// Show the row headers.
		fGrid.setRowHeaderWidth(40);
		fGrid.setRowNumbers(true);
		
		// Let's use Times, plain, 9-point.
		fGrid.setGridFont(new Font("TimesRoman", Font.PLAIN, 9));
        
		// Add the grid into the applet panel
		add("Center", fGrid);

		// Add the message area.
		add("North", fMsg);
		
		// Create a panel for our widgets.
		Panel panel = new Panel();
		
		// Add the user input fields.
		panel.add(new Label("Col="));
		panel.add(fJumpCol);
		panel.add(new Label("Row="));
		panel.add(fJumpRow);
		
		// Add some control buttons.
		for (int i = 0; i<fNumButtons; i++) {
			fButton[i] = new Button(buttonLabels[i]);
			panel.add(fButton[i]);
			fButton[i].addActionListener(this);
		}
		
		// Add the panel to our BorderLayout.
		add("South", panel);
	}

	/**
	 * Catch the button presses.
	 */
	public void actionPerformed(ActionEvent evt) {
		boolean handled = false;
		
		if (evt.getSource() instanceof Button) {
			try {
				// Get the user input.
				int col = Integer.parseInt(fJumpCol.getText());
				int row = Integer.parseInt(fJumpRow.getText());
				
				// Turn off any selections.
				fGrid.deselectAll(true);
				
				if (evt.getSource() == fButton[0]) {
					// Select and reveal a cell.
					fGrid.selectCell(col, row, true);
					fGrid.revealCell(col, row);
					handled = true;
				} else if (evt.getSource() == fButton[1]) {
					// Select and reveal a column.
					fGrid.selectCol(col, true);
					fGrid.revealCol(col);
					handled = true;
				} else if (evt.getSource() == fButton[2]) {
					// Select and reveal a row.
					fGrid.selectRow(row, true);
					fGrid.revealRow(row);
					handled = true;
				}
			} catch (Exception e) {
				// Error message for bogus user input.
				fMsg.setText("Enter a valid col&row!: " + e.toString());
			}

			// Reset the message.
			fMsg.setText("Enter a column and row and press one of the buttons.");
		}
	}
}