Ignition GUI plugin to toggle floor visibility.

[chianfern]

Signed-off-by: Tan Chian Fern chianfern@openrobotics.org

toggle_floors plugin

Adds a ignition::gui::Plugin to toggle visibility of floors and robots.
Requires rmf_traffic_editor #424. Closes #66.

Note: There's an unresolved issue with LoadConfig(). It reads the information in the world sdf correctly on first load, but not when the plugin is closed and reloaded.
Update: Resolved, plugin information is retrieved again when reloaded.

[codebot]

Tested on hotel demo and works as expected 👍

[luca-della-vedova]

Thanks for the PR! Looking great so far.

I only encountered one edge case that happens when the plugin is used to toggle a floor, then closed and reopened, from what I see:

• When plugin is closed, nothing changes (OK)
• When it is reopened, it defaults to all floors selected (acceptable) but only the robots reappear in the floor that was previously deselected (not quite right).

I can see how this could be a tricky issue since you would need to preserve state across plugin object creation / destruction, I guess some solutions could be:

• Reset to everything visible when closing the plugin
• For finding a way to save the state and make sure that the plugin, when reloaded, defaults to the same floors being toggled
• Making sure that when reopening, and having everything set as visible, it iterates through the models and sets them as visible.

I'm OK with anything really, as long as there is consistent behavior between what is set in the plugin and what is visible

[chianfern]

• Making sure that when reopening, and having everything set as visible, it iterates through the models and sets them as visible.

Thanks for the catch! Fixed.

[luca-della-vedova]

Awesome thanks!