/**************************************************************************
* Copyright (c) 2001 by Acunia N.V. All rights reserved. *
* *
* This software is copyrighted by and is the sole property of Acunia N.V. *
* and its licensors, if any. All rights, title, ownership, or other *
* interests in the software remain the property of Acunia N.V. and its *
* licensors, if any. *
* *
* This software may only be used in accordance with the corresponding *
* license agreement. Any unauthorized use, duplication, transmission, *
* distribution or disclosure of this software is expressly forbidden. *
* *
* This Copyright notice may not be removed or modified without prior *
* written consent of Acunia N.V. *
* *
* Acunia N.V. reserves the right to modify this software without notice. *
* *
* Acunia N.V. *
* Vanden Tymplestraat 35 info@acunia.com *
* 3000 Leuven http://www.acunia.com *
* Belgium - EUROPE *
**************************************************************************/
package com.acunia.wonka.test.awt.event;
import com.acunia.wonka.test.awt.*;
import java.awt.event.*;
import java.awt.*;
public class AdjustmentMulticastTest extends VisualTestImpl implements ActionListener {
private Button[] add;
private Button[] remove;
private AdjustmentDisplay[] display;
private NamedScrollbar generator;
final static int LISTENERS = 5;
private Button ten;
private Button fifty;
private Button twofifty;
public AdjustmentMulticastTest() {
setForeground(new Color(108,56,32));
setBackground(new Color(64,160,96));
int step = 100/LISTENERS;
int green = 155-step;
int blue = 155-step;
setLayout(new BorderLayout());
Panel width = new Panel(new GridLayout(1,3));
ten = new Button("width 10");
ten.addActionListener(this);
ten.setBackground(new Color(64,green,blue));
width.add(ten);
green+=step;
fifty = new Button("width 50");
fifty.addActionListener(this);
fifty.setBackground(new Color(64,green,blue));
width.add(fifty);
blue+=step;
twofifty = new Button("width 250");
twofifty.addActionListener(this);
twofifty.setBackground(new Color(64,green,blue));
width.add(twofifty);
add(width,BorderLayout.NORTH);
generator = new NamedScrollbar("<main scrollbar>",10);
add(generator, BorderLayout.CENTER);
Panel listeners = new Panel(new GridLayout(LISTENERS,1));
Panel[] row = new Panel[LISTENERS];
add = new Button[LISTENERS];
display = new AdjustmentDisplay[LISTENERS];
remove = new Button[LISTENERS];
for(int i=0; i<LISTENERS; i++) {
row[i] = new Panel(new BorderLayout() );
display[i] = new AdjustmentDisplay("Press <add> to add a listener to this panel", new Color(64,green,blue),new Color(128,50,80));
row[i].add(display[i],BorderLayout.CENTER);
green+= step;
add[i] = new Button("Add");
add[i].setBackground(new Color(64,green,blue));
add[i].addActionListener(this);
row[i].add(add[i],BorderLayout.WEST);
blue+= step;
remove[i] = new Button("Remove");
remove[i].setBackground(new Color(64,green,blue));
remove[i].addActionListener(this);
row[i].add(remove[i], BorderLayout.EAST);
listeners.add(row[i]);
}
add(listeners, BorderLayout.SOUTH);
}
/****************************************************************/
/** ActionListener interface actionPerformed:
* with the <add> or <remove> button clicked, add or remove the Item listener to its panel
*/
public void actionPerformed(ActionEvent evt) {
boolean found = false;
Object source = evt.getSource();
for(int i=0; i<LISTENERS && !found; i++) {
if(source == add[i]) {
generator.addAdjustmentListener(display[i]);
display[i].displayMessage("Listener added. press <remove> to remove it again");
found = true;
}
else if(source == remove[i]) {
generator.removeAdjustmentListener(display[i]);
display[i].displayMessage("Listener removed. press <add> to add it again");
found = true;
}
}
if(!found){
if(source == ten) {
generator.setNewMaximum(10);
}
else if (source == fifty) {
generator.setNewMaximum(50);
}
else if (source == twofifty) {
generator.setNewMaximum(250);
}
}
}
/****************************************************************/
/** CollectsEvent interface display messages : do nothing, we only display our own messages
*/
public void displayMessage(String[] messagestrings) {
}
public String getHelpText() {
return "The aim: test the throwing of AdjustmentEvents through the AWTEventMulticaster functions:\n\n"+
"The screen consists out a central scrollbar, three <width> buttons and "+LISTENERS+" AdjustmentDisplay panels. Each of this panels"+
" is flanked by an <add> and a <remove> button.\n"+
"The scrollbar throws an AdjustmentEvent every time the position of its scrollbox is changed, either by pressing the up and down"+
" buttons, by clicking on the field before or after the scrollbox, or by dragging the box with the mouse.\n"+
" Using the width buttons, you can set the scrollbox' width to either ten, fifty or two hundred and fifty units. Using the <add>"+
" and <remove> buttons, you can add an ItemListener to a panel in order to get the ItemEvents displayed on that panel,"+
" or remove the listener from that panel again\n."+
"(Adding and removing is done by calls to the static AWTEventMulticaster.Add()and -remove() functions\n)"+
"\n Items to test : \n -------------\n"+
" => Pressing <add> for a panel and subsequently clicking in the event field to check if the AdjustmentEvent is displayed"+
" on the newly selected panel, as well as on all other previously selected panels\n"+
" => Pressing <remove> for a panel and subsequently clicking in the event field to check if the event is no longer"+
" displayed on that panel, nor on the panels previously deselected, yet remains displayed on all other panels still selected\n"+
" => Pressing <add> for the same panel over and over again to see that the panel is not added twice\n"+
" => Pressing <remove> for the same panel over and over again, or pressing <remove> on a panel to which no listener is added yet"+
" to check that a panel is not removed twice\n"+
" => SPEED CHECK: set the scrollbar width to the maximum and drag the scrollbox with the mouse. Check if the response time to the"+
" continuous stream of AdjustmentEvents thrown through the Multicaster is not slowing down other operations"+
" \n ps. as the Add and remove routines have a slightly different algorithm for the first and second listener then for all"+
" subsequent listeners, specially check the behavior when \n"+
" - adding the first panel, adding the second panel, adding the third panel\n"+
" - removing the third-last panel, removing the second-last panel, removing the last panel\n"+
" - giving a remove-command when no panels are selected";
}
/****************************************************************/
/** Overrides the Scrollbar class to
* 1) calculate position, width and block increment out of new maximum on changing scrollbar max
* 2) provide a name to display in the toString() function instead of the diagnostics
*/
class NamedScrollbar extends Scrollbar {
String name;
public NamedScrollbar(String name, int maximum) {
super(Adjustable.HORIZONTAL, 0, 5, 0, maximum);
//setBlockIncrement(10);
this.name = name;
}
public void setNewMaximum(int newmax) {
int newval= getValue()*newmax/getMaximum();
// setValues(newval,newmax/10,0,newmax);
// setBlockIncrement((newmax>20)?newmax/10:2);
setValues(newval,5,0,newmax);
//setBlockIncrement((newmax>20)?10:newmax/2);
}
public String toString() {
return name;
}
}
}