1.2. Mouse usage
Keyword: mouse
File: MOUSE.TXT
Last Modified:  27-sept-94

When the cursor is in the IMAGE window, the mouse can be used
beside for picking atoms as a substitute input from dials.
(The dials substitution is disabled on the ESV computers.)
The mouse has 3 buttons: left (L), middle (M) and right(R).
When one or two of them are pressed and moved, they replace
input from the current dials set.  By default:

The left button (L) can control rotations around X, Y and Z
axis.  When the cursor is moved within a circle of the image
window center, the horizontal movements correspond to rotation
about Y axis and vertical about X axis.  If cursor is moved
outside the circle, its' movement results in rotation about Z
axis.

The middle button (M) controls translations along X and Y
direction.

The left and middle button (LM) pressed together and moved
vertically; they translate image along the Z direction.

The right button (R) controls scaling of the image (zoom).
When cursor is moved towards the center of the image window,
the image is shrunk, and when it is moving away from it, the
image is expanded.

The right and middle button (RM) pressed together control
clipping.  When the cursor is moved towards the center of the
image window, the clipping planes are moved together, and when
it is moving away from it, the separation between the clipping
planes is increased.

Changing dial definitions will also change the mouse button
functions.  In general, pressed middle button (M) mimics dials
1 and 2, pressed left and middle button (LM) mimic dial 3,
right button (R) mimic dial 4, left button (L) mimics dials 5,
6 and 7, and combination of right and middle button (RM) mimic
dial 8.


Releasing a mouse button while still moving the cursor results
in a continuation repetition of the last move before the
release.  So smooth rotations of image on the screen can be
achieved.


1.2.1. Mouse trouble shooting
Keyword: trouble shooting, picking

When mouse doesn't behave properly it needs to be resetted.
This happens quite often (on HP it is a rule) when the image
window is iconized and then restored. 

So reset the mouse by pressing any keyboard character key or type
commands

> image mouse off
> image mouse on

If you get anoyed with dial rotations (you are unable to pick atoms
because you keep moving the image), turn the mouse dial mimicking
functions off:

> image mouse off