feat: toggle buttons, placeholders, on_open/on_close hooks, not_tag condition#3
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…/guiapi → help
Toggle buttons:
- New 'toggle' field on buttons (replaces item/actions)
- State backed by a scoreboard tag on the player
- item_on/off, name_on/off, lore_on/off, glint_on/off, actions_on/off
- Default actions_on/off auto-add/remove the tag (run_with: console)
- Render picks the correct face based on player.getCommandTags()
Placeholders (resolved per-player at render + action time):
- {player}, {gui}, {page}, {page1}, {pages}, {score:objective}
- Supported in: name, lore, message value, run_command value, title
on_open / on_close action hooks:
- Top-level 'on_open' / 'on_close' arrays in the GUI JSON
- on_open fires after the screen packet is sent
- on_close fires in GuiScreenHandler.onClosed() via BarrelGuiHandler.onClose(ServerPlayerEntity)
- Useful for tagging players, running scoreboard ops, logging, etc.
not_tag condition:
- Visible when player does NOT have the given tag
- Complement to has_tag for cleaner conditional layouts
/guiapi → help:
- Bare /guiapi (no subcommand) now executes showHelp instead of doing nothing
Example datapack:
- showcase.json: toggle, placeholders in title/lore, on_open/on_close messages,
not_tag condition example
- admin_panel.json: placeholder in title, on_open/on_close tag hooks, PvP toggle button
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