Hello !
I'm attempt to write graphics WISIWIG editor that can create
figures in real scale . Ie if section have original width 1000.789
millimeters then on screen it have width 10.00789 mm at scale
0.01 (100:1). I know that i be able to use AffineTransform to
convert user space coordinates to device space . But events on
draw surface (i use JPanel) generate only int values of it
coordinates. I attempt to fix this by convert MouseEvent to
ScaledMouseEvent :
class Surface extends JPanel implements
MouseListener,MouseMotionListener {
//cached transform
AffineTransform at;
...
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
AffineTransform old = g2.getTransform();
g2.transform(at);
figures.draw(g);
g2.setTransform(old);
}
public void mousePressed(MouseEvent e){
//use cached transform
Point2D p=at.inversTransform(e.getPoint(),null);
ScaledMouseEvent se=new ScaledMouseEvent(this,
e.getID(),
e.getWhen(),
e.getModifiers(),
p.getX(),
p.getY(),
e.getClickCount(),
e.isPopupTrigger());
...
}
public void mouseDragged(MouseEvent e){
//use cached transform
Point2D p=at.inversTransform(e.getPoint(),null);
ScaledMouseEvent se=new ScaledMouseEvent(this,
e.getID(),
e.getWhen(),
e.getModifiers(),
p.getX(),
p.getY(),
e.getClickCount(),
e.isPopupTrigger());
...
}
...
}
But then i drag figures along screen theirs outline and corner
handles "diddes" and derived event coordinates step by 1/scale .
Can anyone help me to avoid this ?
--
Best regards,
Andrey mailto:[EMAIL PROTECTED]
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