package iiuf.awt;
import java.awt.Dimension;
import java.awt.Canvas;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.AdjustmentEvent;
import java.awt.Adjustable;
import java.util.Vector;
import iiuf.util.Util;
import iiuf.util.EventListenerList;
/**
Horizontal navigator.
(c) 1999, 2000, 2001, IIUF, DIUF<p>
@author $Author: ohitz $
@version $Name: $ $Revision: 1.1 $
*/
public class HNav
extends
Canvas
implements
MouseMotionListener,
MouseListener,
Adjustable,
Runnable
{
private static final int MIN_SIZE = 16;
private Color color;
private Color dark;
private Color bright;
private int delta;
private int startX;
private boolean startXvalid;
private int high;
private int low;
private int min = -1000;
private int max = 1000;
private EventListenerList listeners = new EventListenerList();
private int fac = 2;
private int event_ms;
private Thread event_poster;
private boolean event_poster_running;
private boolean invValue;
private boolean retract;
public HNav(int event_ms) {
this(event_ms, true);
}
public HNav(int event_ms_, boolean retract_) {
event_ms = event_ms_;
retract = retract_;
event_poster = new Thread(this);
event_poster.start();
addMouseMotionListener(this);
addMouseListener(this);
}
public int getOrientation() {return Adjustable.HORIZONTAL;}
public void setMinimum(int min_) {min = min_; recalc();}
public int getMinimum() {return min;}
public void setMaximum(int max_) {max = max_; recalc();}
public int getMaximum() {return max;}
public void setUnitIncrement(int u) {}
public int getUnitIncrement() {return -1;}
public void setBlockIncrement(int b){}
public int getBlockIncrement() {return -1;}
public void setVisibleAmount(int v) {}
public int getVisibleAmount() {return -1;}
public int getValue() {return delta;}
public void setValue(int v) {
delta = v;
repaint();
}
public void addAdjustmentListener(AdjustmentListener listener) {
listeners.add(AdjustmentListener.class, listener);
}
public void addAdjustmentListener(AdjustmentListener listener, boolean weak) {
listeners.add(AdjustmentListener.class, listener, weak);
}
public void removeAdjustmentListener(AdjustmentListener listener) {
listeners.remove(AdjustmentListener.class, listener);
}
public void mouseDragged(MouseEvent e) {
if(startXvalid) {
delta = startX - e.getX();
delta *= delta > 0 ? fac * max : fac * -min;
delta /= (getSize().width - MIN_SIZE);
if(delta > max) delta = max;
if(delta < min) delta = min;
repaint();
synchronized(this) {
if(!event_poster_running)
notify();
}
}
}
public void mouseMoved(MouseEvent e) {reset(e.getX()); }
public void mouseClicked(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mousePressed(MouseEvent e) {reset(e.getX());}
public void mouseReleased(MouseEvent e) {reset(e.getX());}
public synchronized void run() {
for(;;) {
try{wait();}
catch(InterruptedException e) {Util.printStackTrace(e);}
event_poster_running = true;
while(delta != 0) {
AdjustmentListener[] l = (AdjustmentListener[])listeners.getListeners(AdjustmentListener.class);
AdjustmentEvent e = new AdjustmentEvent(this,
AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED,
AdjustmentEvent.TRACK,
invValue ? -delta : delta);
for(int i = 0; i < l.length; i++)
l[i].adjustmentValueChanged(e);
try{wait(event_ms);}
catch(InterruptedException ex) {Util.printStackTrace(ex);}
}
event_poster_running = false;
}
}
public void invertValue() {
invValue = true;
}
public void normalValue() {
invValue = false;
}
private void recalc() {
if(max < 0) max = 0;
if(min > 0) min = 0;
fac = (max == 0 || min == 0) ? 1 : 2;
}
private void reset(int x) {
startX = x;
startXvalid = startX >= low - MIN_SIZE && startX <= low;
if(delta != 0 && retract) {
delta = 0;
repaint();
}
}
public void paint(Graphics g) {
if(color == null) {
color = getBackground();
bright = color.brighter();
dark = color.darker();
}
Dimension size = getSize();
size.height--;
size.width -= 2;
g.setColor(bright);
high = delta > 0 ?
((size.width - MIN_SIZE) * (max - delta)) / (fac * max) :
(size.width - MIN_SIZE) / fac;
low = delta < 0 ?
(((size.width - MIN_SIZE) * delta) / (fac * min)) + (size.width + MIN_SIZE) / fac :
(size.width + MIN_SIZE) / fac;
if(max == 0) {
high = 0;
low -= size.width;
}
if(min == 0)
low = size.width;
size.width++;
high++;
g.setColor(bright);
g.drawLine(high, 1, high, size.height - 1);
g.drawLine(high, 1, low, 1);
g.drawLine(0, size.height, size.width, size.height);
g.drawLine(size.width, 0, size.width, size.height);
g.setColor(dark);
g.drawLine(low, 1, low, size.height - 1);
g.drawLine(low, size.height - 1, high, size.height - 1);
g.drawLine(0, 0, 0, size.height);
g.drawLine(0, 0, size.width, 0);
}
public Dimension getMinimumSize() {
return new Dimension(MIN_SIZE * 2, MIN_SIZE);
}
public Dimension getPreferredSize() {
Dimension size = getSize();
return new Dimension(size.width < MIN_SIZE * 2 ? MIN_SIZE * 2 : size.width, MIN_SIZE);
}
public static void main(String[] argv) {
HNav nav0 = new HNav(200);
nav0.setMaximum(100);
nav0.setMinimum(-100);
HNav nav1 = new HNav(200);
nav1.setMaximum(0);
nav1.setMinimum(-100);
HNav nav2 = new HNav(200);
nav2.setMaximum(100);
nav2.setMinimum(0);
AdjustmentListener l = new AdjustmentListener() {
public void adjustmentValueChanged(AdjustmentEvent e) {
System.out.println(e);
}
};
nav0.addAdjustmentListener(l);
nav1.addAdjustmentListener(l);
nav2.addAdjustmentListener(l);
new Frame(nav0, true);
new Frame(nav1, true);
new Frame(nav2, true);
}
}
/*
$Log: HNav.java,v $
Revision 1.1 2002/07/11 09:20:36 ohitz
Initial checkin
Revision 1.4 2001/01/12 08:26:20 schubige
TJGUI update and some TreeView bug fixes
Revision 1.3 2001/01/04 16:28:29 schubige
Header update for 2001 and DIUF
Revision 1.2 2001/01/03 15:23:50 schubige
graph stuff beta
Revision 1.1 2000/01/11 09:36:50 schubige
added voter stuff
Revision 1.3 1999/11/26 10:00:42 schubige
updated for new awt package
Revision 1.2 1999/11/26 09:14:29 schubige
intermediate commit
Revision 1.1 1999/11/26 08:51:16 schubige
*** empty log message ***
*/