Slideshow option. about imv

[rien333]

@eXeC64 a toggle command. Thanks for all the work that you've been putting into the 4.0 branch! (the round thing is a bit silly, but I don't use decimal places for slideshows anyway. Could be made a little more elegant tho)

toggle = exec ([ $(calc -p "round($imv_slideshow_duration)") -eq "0" ] && imv-msg $imv_pid "ss 2") || imv-msg $imv_pid "ss 0"

[eXeC64]

This is one of those features that I'm not strongly opposed to, but I'm certainly hesitant about. Could you expand upon the use case for this? When would a user need this? For a custom electronic picture frame? As a screensaver of some sort?

I'm just struggling to see when this would be useful where imv would also be the appropriate tool for the job.

[hakoerber]

My use case would be something like "Being at a family gathering and showing some images on a projector." I guess I could use a remote to switch between images, but a fixed delay works well in my experience. Electronic picture frame would be another example where this is useful (not for me but in general), as you said.

Right now I'm using feh for this, but if you think this feature could be useful to have imv, I'd give it a go.

[eXeC64]

I'll accept it, but if done I think it should behave like this:

• -t [time] option to set how long to show each image for
• t key binding increases display time by 1 second
• T key binding decreases display time by 1 second
• If non-zero, the time left and display time should be shown in the overlay and window title in the form [display-time-so-far/display-time]
• A display time of 0 indicates the slideshow is not active

This way, the speed can be adjusted at run-time, and playback even paused, with information about how much time is left.

[hakoerber]

That sound good, I will try implementing this as soon as I have some time.

[rien333]

Is their currently a way to pause the slideshow? I suppose you could set $imv_slideshow_duration to zero. But currently this variable is only mentioned in the docs.

EDIT:
rather hacky solution I came up with:

void command_pause(struct list *args, const char *argstr, void *data)
{
  (void)args;
  (void)argstr;
  struct imv *imv = data;
  imv->slideshow_image_duration = 0;
  imv->need_redraw = true;
}

Ideally, the previous image duration just would be restored (I think?) Would you be willing to implement a PR based on this code?

[eXeC64]

There isn't a way to pause slideshows as of yet, but it's something that can go into v4. I'm going to be changing around the commands to make them more friendly, but I've not decided how to structure the slideshow commands, perhaps slideshow <n> to start the slideshow with a given duration, +- prefix to adjust the duration, and slideshow pause to pause/unpause. ss would probably be an alias for slideshow

[rien333]

I like the current solution! You can do something like:

[alias]
pause = slideshow 0

And probably do something like a toggle too by inspecting the $imv_slideshow_duration

[eXeC64]

I'm not sure it's possible to create a toggle bind/command without further extensions. Also, it's not documented, but ss is a builtin alias for slideshow so I do ss 0 to pause and ss 3 to resume, which I quite like.

[eXeC64]

Neat! I think it wasn't possible before $imv_pid, but with that addition a whole bunch of scripting possibilities have opened up.