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| public class DemoCases extends JPanel {
private static final long serialVersionUID = 1L;
private static final int DEFAULT_NB_CASES = 3;
private final Coord coord = new Coord();
private int nbCases;
private int highlightedi=-1;
private int highlightedj=-1;
private boolean selected;
public void setNbCases(int nbCases) {
final int old = nbCases;
this.nbCases = Math.max(nbCases, 0);
if ( this.nbCases!=old ) {
repaint();
}
}
public Point getCase(Point point) {
computeCoord();
point.x-=coord.offsetX;
point.y-=coord.offsetY;
int i = point.y/coord.width;
int j = point.x/coord.width;
return new Point(i,j);
}
public void highlightCase(Point p) {
highlightCase(p.x,p.y);
}
public void highlightCase(int i, int j) {
if ( i!=this.highlightedi || j!=this.highlightedj ) {
this.highlightedi=i;
this.highlightedj=j;
repaint();
}
}
public void selectCase(boolean selected) {
if ( this.selected!=selected ) {
this.selected = selected;
repaint();
}
}
@Override
public void paint(Graphics g) {
super.paint(g);
computeCoord();
if ( coord.width!=-1 ) {
Graphics2D g2d = (Graphics2D) g.create();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
for(int i=0; i<nbCases; i++) {
for(int j=0; j<nbCases; j++) {
drawCase(g2d, i, j, coord.offsetX+j*coord.width, coord.offsetY+i*coord.width, coord.width, coord.width);
}
}
}
}
protected void drawCase(Graphics g, int i, int j, int x, int y, int width, int height) {
g.setColor(Color.ORANGE);
g.fillRoundRect(x+2, y+2, width-4, height-4, 8, 8);
if ( i==highlightedi && j==highlightedj ) {
if ( selected ) {
g.setColor(Color.YELLOW);
}
else {
g.setColor(Color.BLUE);
}
}
else {
g.setColor(Color.WHITE);
}
g.fillRoundRect(x+4, y+4, width-8, height-8, 8, 8);
g.setColor(Color.DARK_GRAY);
g.drawRoundRect(x+4, y+4, width-8, height-8, 8, 8);
g.drawRoundRect(x+2, y+2, width-4, height-4, 8, 8);
}
private void computeCoord() {
if ( nbCases>0 ) {
final Dimension size = getSize();
coord.width = Math.min( size.width/nbCases, size.height/nbCases);
final int gridWidth = coord.width * nbCases;
coord.offsetX = ( size.width - gridWidth)/2;
coord.offsetY = ( size.height - gridWidth)/2;
}
else {
coord.width = -1;
}
}
private static class Coord {
public int offsetX;
public int offsetY;
public int width;
}
public static void main(String[] args) {
JFrame frame = new JFrame("Démo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DemoCases casePanel = new DemoCases();
casePanel.setNbCases(DEFAULT_NB_CASES);
JPanel paramPanel = new JPanel(new BorderLayout());
JSpinner spinner = new JSpinner(new SpinnerNumberModel(DEFAULT_NB_CASES, 0, 10, 1) );
paramPanel.add(spinner, BorderLayout.CENTER);
spinner.addChangeListener(e-> {
casePanel.setNbCases((Integer)spinner.getValue());
casePanel.paintImmediately(casePanel.getBounds());
});
JLabel label = new JLabel("Nb case(s) :");
paramPanel.add(label, BorderLayout.WEST);
frame.add( casePanel );
frame.add( paramPanel, BorderLayout.NORTH);
MouseAdapter mouseAdapter = new MouseAdapter() {
@Override
public void mouseExited(java.awt.event.MouseEvent e) {
casePanel.selectCase(false);
casePanel.highlightCase(-1, -1);
}
@Override
public void mouseMoved(MouseEvent e) {
casePanel.highlightCase( casePanel.getCase(e.getPoint()) ) ;
}
@Override
public void mousePressed(MouseEvent e) {
if( e.getButton()==e.BUTTON1 ) {
casePanel.selectCase(true);
}
}
@Override
public void mouseReleased(MouseEvent e) {
if( e.getButton()==e.BUTTON1 ) {
casePanel.selectCase(false);
casePanel.highlightCase( casePanel.getCase(e.getPoint()) ) ;
}
}
};
casePanel.addMouseListener(mouseAdapter);
casePanel.addMouseMotionListener(mouseAdapter);
frame.setSize(300, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
} |
