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1

When getting events from (read-event) it's possible to access only mouse events using (mouse-movement-p event).

Inspecting the events I've found I can get the Y pixel location using (cdr (nth 2 (nth 1 event)) however this seems overly cryptic.

What is a good way to access data in mouse motion events?

mouse events

share|improve this question

edited Jul 14 at 9:52

ideasman42

asked Jul 14 at 7:16

ideasman42ideasman42

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add a comment | 

1

When getting events from (read-event) it's possible to access only mouse events using (mouse-movement-p event).

Inspecting the events I've found I can get the Y pixel location using (cdr (nth 2 (nth 1 event)) however this seems overly cryptic.

What is a good way to access data in mouse motion events?

mouse events

share|improve this question

edited Jul 14 at 9:52

ideasman42

asked Jul 14 at 7:16

ideasman42ideasman42

1,92777 silver badges2626 bronze badges

add a comment | 

When getting events from (read-event) it's possible to access only mouse events using (mouse-movement-p event).

Inspecting the events I've found I can get the Y pixel location using (cdr (nth 2 (nth 1 event)) however this seems overly cryptic.

What is a good way to access data in mouse motion events?

mouse events

share|improve this question

edited Jul 14 at 9:52

ideasman42

asked Jul 14 at 7:16

ideasman42ideasman42

1,92777 silver badges2626 bronze badges

share|improve this question

edited Jul 14 at 9:52

ideasman42

asked Jul 14 at 7:16

ideasman42ideasman42

1,92777 silver badges2626 bronze badges

share|improve this question

edited Jul 14 at 9:52

ideasman42

asked Jul 14 at 7:16

ideasman42ideasman42

1,92777 silver badges2626 bronze badges

asked Jul 14 at 7:16

ideasman42ideasman42

1,92777 silver badges2626 bronze badges

asked Jul 14 at 7:16

ideasman42ideasman42

1,92777 silver badges2626 bronze badges

1 Answer
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3

There is a list of functions with the posn prefix to extract that information and more from mouse events. One caveat is that many of them require a start/end event:

(let ((e (read-event)))
 (when (mouse-event-p e)
 (let ((x-y (posn-x-y (event-start e))))
 (message "Mouse event at: %d|%d" (car x-y) (cdr x-y)))))

share|improve this answer

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How to access pixel coordinates?
  
  – ideasman42
  Jul 14 at 11:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Wasamasa answered exactly the question in your comment, no? C-h f posn-x-y.
  
  – Drew
  Jul 14 at 14:14
  

  
  
  
  

add a comment | 

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3

There is a list of functions with the posn prefix to extract that information and more from mouse events. One caveat is that many of them require a start/end event:

(let ((e (read-event)))
 (when (mouse-event-p e)
 (let ((x-y (posn-x-y (event-start e))))
 (message "Mouse event at: %d|%d" (car x-y) (cdr x-y)))))

share|improve this answer

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How to access pixel coordinates?
  
  – ideasman42
  Jul 14 at 11:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Wasamasa answered exactly the question in your comment, no? C-h f posn-x-y.
  
  – Drew
  Jul 14 at 14:14
  

  
  
  
  

add a comment | 

3

There is a list of functions with the posn prefix to extract that information and more from mouse events. One caveat is that many of them require a start/end event:

(let ((e (read-event)))
 (when (mouse-event-p e)
 (let ((x-y (posn-x-y (event-start e))))
 (message "Mouse event at: %d|%d" (car x-y) (cdr x-y)))))

share|improve this answer

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How to access pixel coordinates?
  
  – ideasman42
  Jul 14 at 11:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Wasamasa answered exactly the question in your comment, no? C-h f posn-x-y.
  
  – Drew
  Jul 14 at 14:14
  

  
  
  
  

add a comment | 

There is a list of functions with the posn prefix to extract that information and more from mouse events. One caveat is that many of them require a start/end event:

(let ((e (read-event)))
 (when (mouse-event-p e)
 (let ((x-y (posn-x-y (event-start e))))
 (message "Mouse event at: %d|%d" (car x-y) (cdr x-y)))))

share|improve this answer

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges

(let ((e (read-event)))
 (when (mouse-event-p e)
 (let ((x-y (posn-x-y (event-start e))))
 (message "Mouse event at: %d|%d" (car x-y) (cdr x-y)))))

share|improve this answer

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges

answered Jul 14 at 10:01

wasamasawasamasa

16.2k11 gold badge4040 silver badges7171 bronze badges