Detecting mouse buttons

[Daniel Tahin]

Hi all!

How can i determine, which mouse button was pressed, using
java.awt.Event class (JDK1.0 API)?
I write following for the left button:
if( e.modifiers!=Event.ALT_MASK && e.modifiers!=Event.META_MASK ) {
doSomething();
}
//all these things are inside of handleEvent(Event e) {}, and i extend
java.awt.Canvas.

This seems to be working for the left button, BUT there is only 1
problem. If i use the scroller, doSomething() will be invoked as well
(the mouse has 2 buttons, and a scroller).


Do you know any solution for this problem?
Thanx in advance,
Daniel

 

[Stefan Schulz]

Hi all!

How can i determine, which mouse button was pressed, using
java.awt.Event class (JDK1.0 API)?
I write following for the left button:
if( e.modifiers!=Event.ALT_MASK && e.modifiers!=Event.META_MASK ) {
doSomething();
}
//all these things are inside of handleEvent(Event e) {}, and i extend
java.awt.Canvas.

This seems to be working for the left button, BUT there is only 1
problem. If i use the scroller, doSomething() will be invoked as well
(the mouse has 2 buttons, and a scroller).

Just guessing here, but the proper idom would likely be

( (e.modifiers & Event.ALT_MASK) != 0
&& (e.modifiers & Event.META_MASK)!= 0)

since there might be both ALT and META active.

 

[Stefan Schulz]

Just guessing here, but the proper idom would likely be

( (e.modifiers & Event.ALT_MASK) != 0
&& (e.modifiers & Event.META_MASK)!= 0)

since there might be both ALT and META active.

Erg. make that == in both cases. We are checking for absence of the flags,
not presence.

 

[Joan]

Hi all!

How can i determine, which mouse button was pressed, using
java.awt.Event class (JDK1.0 API)?

I might be mistaken, but I don't think the mouse wheel was invented back
then.

 

[Daniel Tahin]

Yes, this is OK for scanning the left button, but the previous problem
is still there:-((

 

[Tom N]

How can i determine, which mouse button was pressed, using
java.awt.Event class (JDK1.0 API)?
I write following for the left button:
if( e.modifiers!=Event.ALT_MASK && e.modifiers!=Event.META_MASK ) {
doSomething();
}
//all these things are inside of handleEvent(Event e) {}, and i extend
java.awt.Canvas.

This seems to be working for the left button, BUT there is only 1
problem. If i use the scroller, doSomething() will be invoked as well
(the mouse has 2 buttons, and a scroller).

Mouse events are actually java.awt.event.MouseEvent.

Call java.awt.event.MouseEvent.getButton()

result 1 = left button
2 = scroll wheel (middle button)
3 = right button

You might need to call canvas.addMouseListener(new MySubClassOfMouseAdapter())

 

[Roedy Green]

This seems to be working for the left button, BUT there is only 1
problem. If i use the scroller, doSomething() will be invoked as well
(the mouse has 2 buttons, and a scroller).


Do you know any solution for this problem

Have a read of my general essay on the problem. see
http://mindprod.com/jgloss/event11.html

I can't figure out just what it is your are asking.

In these sorts of problem. your first task it to makes you are seeing
the event, and not to many other events -- ie. that you are tapping
the right place with the right sort of listener.

Once you have that established, then start thinking about how to
filter your events.

You normally don't meddle at the low level you are proposing.



--
Bush crime family lost/embezzled $3 trillion from Pentagon.
Complicit Bush-friendly media keeps mum. Rumsfeld confesses on video.
http://www.infowars.com/articles/us/mckinney_grills_rumsfeld.htm

Canadian Mind Products, Roedy Green.
See http://mindprod.com/iraq.html photos of Bush's war crimes

 

[Daniel Tahin]

Have a read of my general essay on the problem. see
http://mindprod.com/jgloss/event11.html

A great site. Is it possible to download the complete site for offline use?

I can't figure out just what it is your are asking.

Eevrything worked fine with handleEvent(), but it seems for me, that
jdk1.3 under Linux interpret the scroller of the mice, as the left
button (scrolling has the same effect, as pressing the left button.
Curious, because the wheel mouse support was introduced first in java 1.4).
I solved the problem by not using the left button... :-(
Now everything is ok.

In these sorts of problem. your first task it to makes you are seeing
the event, and not to many other events -- ie. that you are tapping
the right place with the right sort of listener.

Once you have that established, then start thinking about how to
filter your events.

You normally don't meddle at the low level you are proposing.

cu,
Daniel