Re: mouse pan and zoom

[Tatsuro M. <tma...@ya...>]

Hello

I have built wgnuplot with wxt on the cvs trees
2009-07-18  Ethan A Merritt  <merritt@u.washington.edu>

	* src/wxterminal/wxt_gui.cpp src/wxterminal/wxt_gui.h:
	Pass through mouse wheel events from the wxt terminal, so that the new
	pan and zoom works for wxt as well as x11.

I have confirmed that  pan and zoom using work on wxt but does not work on windows terminal.

Regards

Tatsuro

--- Ethan Merritt  wrote:

> On Friday 17 July 2009, Ethan Merritt wrote:
> > On Friday 17 July 2009, James R. Van Zandt wrote:
> > > 
> > > I've just checked in code to do "pan and zoom" with the mouse wheel.
> > 
> > First thoughts:
> > 
> > It works nicely here in x11, but doesn't do anything at all in wxt or
> > in the new canvas or qt terminals.  I understand that extra javascript
> > would be needed for the canvas,  but what is needed in order to support
> > this for other interactive terminal types?
> 
>   OK. I figured out how to add a wxt handler for mouse wheel events.
> 
>   I'll punt on qt and hope that J将アr将ヤme Lodewyck will take care of it.
> 
>   What about the windows terminal - can someone confirm whether that
>   is recognizing pan and zoom using the same conventions as x11?
> 
> 	Ethan 
> 
> 
> 
> > 
> > Wouldn't it be logical to apply this in 3D also?
> > 
> > It does not immediately strike me as useful to save the settings on the
> > zoom stack.  Unlike a click-and-drag zoom operation, the inverse is easy
> > to achieve by reversing the direction of the mouse wheel.
> > 
> > 
> > > These commands work like Acroread or Gimp:
> > > 
> > >  - control-wheel-up zooms in toward the center of the plot
> > >  - control-wheel-down  reverses the above
> > > 
> > >  - wheel-up move the viewpoint up (increases both ymin and ymax by ten
> > >    percent of the plot range)
> > > 
> > >  - wheel-down moves the viewpoint down
> > > 
> > >  - shift-wheel-up moves the viewpoint left (decreases both xmin and xmax
> > >    by ten percent of the plot range)
> > > 
> > >  - shift-wheel-down moves the viewpoint right
> > > 
> > > 
> > > I implemented these just for completeness:
> > > 
> > >  - shift-control-wheel-up zooms in only the X axis
> > >  - shift-control-wheel-down zooms out only the X axis
> > > 
> > > 
> > > These work for linear or log axes.
> > > 
> > > A simple plot for testing, with or without log axes:
> > > 
> > > set parametric; plot sin(t)+1.02,cos(t)+1.02
> > > 
> > > (If zero is not currently on an axis, you can use "L" to toggle
> > > logscale along that axis.)
> > > 
> > > 
> > > I'll be glad to add documentation, but first I'll see what changes
> > > people want.  E.g.:
> > > 
> > >  - Are the pan and zoom steps reasonable?  Should they be user-tunable?
> > >  - Do you have a better idea for shift-control-wheel?
> > >  - Each of these commands is added to the zoom stack, so they can be
> > > undone individually.  That was easy to implement, but do we want that?
> > > Does "u" recover all that memory?  Should we suggest that the user
> > > type "u" occasionally?
> > > 
> > >         - Jim Van Zandt
> > > 
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> 
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