When i press CTRL + Scroll mouse wheel at the same time, it works but when I release the CTRL key and continue scrolling it still works. I want it to work only when CTRL and Mouse wheel scroll at same time.
addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {
addMouseWheelListener(new MouseWheelListener() {
@Override
public void mouseScrolled(MouseEvent g) {
if(e.keyCode == SWT.CTRL){
if(g.count > 0){
System.out.println("up");
int width = getSize().x;
int height = getSize().y;
setSize((int)(width * 1.05), (int)(height * 1.05));
}
else {
System.out.println("down");
int width = getSize().x;
int height = getSize().y;
setSize((int)(width * 0.95), (int)(height * 0.95));
}
}
}
});
}
}
You don't have to add KeyListener. Just check state mask of keyboard button pressed while scrolling. State mask is passed in MouseEvent parameter of MouseScrolled method.
addMouseWheelListener(new MouseWheelListener() {
@Override
public void mouseScrolled(MouseEvent g) {
if((g.stateMask & SWT.CONTROL) == SWT.CONTROL) {
performZoom(g.count);
}
}
});