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/* Segment7.java */
import java.awt.*;
import java.awt.event.*;
class Segment7
extends Canvas
{
private int digit;
private boolean hasfocus;
private int[][] polysx = {
{ 1, 2, 8, 9, 8, 2}, //Segment 0
{ 9,10,10, 9, 8, 8}, //Segment 1
{ 9,10,10, 9, 8, 8}, //Segment 2
{ 1, 2, 8, 9, 8, 2}, //Segment 3
{ 1, 2, 2, 1, 0, 0}, //Segment 4
{ 1, 2, 2, 1, 0, 0}, //Segment 5
{ 1, 2, 8, 9, 8, 2}, //Segment 6
};
private int[][] polysy = {
{ 1, 0, 0, 1, 2, 2}, //Segment 0
{ 1, 2, 8, 9, 8, 2}, //Segment 1
{ 9,10,16,17,16,10}, //Segment 2
{17,16,16,17,18,18}, //Segment 3
{ 9,10,16,17,16,10}, //Segment 4
{ 1, 2, 8, 9, 8, 2}, //Segment 5
{ 9, 8, 8, 9,10,10}, //Segment 6
};
private int[][] digits = {
{1,1,1,1,1,1,0}, //Ziffer 0
{0,1,1,0,0,0,0}, //Ziffer 1
{1,1,0,1,1,0,1}, //Ziffer 2
{1,1,1,1,0,0,1}, //Ziffer 3
{0,1,1,0,0,1,1}, //Ziffer 4
{1,0,1,1,0,1,1}, //Ziffer 5
{1,0,1,1,1,1,1}, //Ziffer 6
{1,1,1,0,0,0,0}, //Ziffer 7
{1,1,1,1,1,1,1}, //Ziffer 8
{1,1,1,1,0,1,1} //Ziffer 9
};
public Segment7()
{
this(0);
}
public Segment7(int digit)
{
super();
this.digit = digit;
this.hasfocus = false;
enableEvents(AWTEvent.COMPONENT_EVENT_MASK);
enableEvents(AWTEvent.FOCUS_EVENT_MASK);
enableEvents(AWTEvent.MOUSE_EVENT_MASK);
enableEvents(AWTEvent.KEY_EVENT_MASK);
}
public Dimension getPreferredSize()
{
return new Dimension(5*10,5*18);
}
public Dimension getMinimumSize()
{
return new Dimension(1*10,1*18);
}
public boolean isFocusTraversable()
{
return true;
}
public void paint(Graphics g)
{
Color darkred = new Color(127,0,0);
Color lightred = new Color(255,0,0);
Color yellow = new Color(255,255,0);
//dx und dy berechnen
int dx = getSize().width / 10;
int dy = getSize().height / 18;
//Hintergrund
g.setColor(darkred);
g.fillRect(0,0,getSize().width,getSize().height);
//Segmente
if (hasfocus) {
g.setColor(yellow);
} else {
g.setColor(lightred);
}
for (int i=0; i < 7; ++i) { //alle Segmente
if (digits[digit][i] == 1) {
Polygon poly = new Polygon();
for (int j = 0; j < 6; ++j) { //alle Eckpunkte
poly.addPoint(dx*polysx[i][j],dy*polysy[i][j]);
}
g.fillPolygon(poly);
}
}
//Trennlinien
g.setColor(darkred);
g.drawLine(0,0,dx*10,dy*10);
g.drawLine(0,8*dy,10*dx,18*dy);
g.drawLine(0,10*dy,10*dx,0);
g.drawLine(0,18*dy,10*dx,8*dy);
}
public int getValue()
{
return digit;
}
public void setValue(int value)
{
digit = value % 10;
}
protected void processComponentEvent(ComponentEvent event)
{
if (event.getID() == ComponentEvent.COMPONENT_SHOWN) {
requestFocus();
}
super.processComponentEvent(event);
}
protected void processFocusEvent(FocusEvent event)
{
if (event.getID() == FocusEvent.FOCUS_GAINED) {
hasfocus = true;
repaint();
} else if (event.getID() == FocusEvent.FOCUS_LOST) {
hasfocus = false;
repaint();
}
super.processFocusEvent(event);
}
protected void processMouseEvent(MouseEvent event)
{
if (event.getID() == MouseEvent.MOUSE_PRESSED) {
requestFocus();
if (!event.isShiftDown()) {
if (event.isMetaDown()) {
setValue(getValue() + 1); //increment by 1
} else {
setValue(getValue() + 9); //decrement by 1
}
}
repaint();
}
super.processMouseEvent(event);
}
protected void processKeyEvent(KeyEvent event)
{
if (event.getID() == KeyEvent.KEY_PRESSED) {
char key = event.getKeyChar();
if (key >= '0' && key <= '9') {
setValue(key - '0');
repaint();
} else if (key == '+') {
setValue(getValue() + 1); //increment by 1
repaint();
} else if (key == '-') {
setValue(getValue() + 9); //decrement by 1
repaint();
}
}
super.processKeyEvent(event);
}
}
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