Blockly: Canvas

Where in the UI. Scripts tab toolbox.

Query, move, align, animate items; schedules; canvas level.

Block id	Read as	Purpose
`containd_query_canvas_items`	query canvas items	callHost(queryCanvasItems)
`containd_move_canvas_items`	move canvas items	callHost(moveCanvasItems)
`containd_resize_canvas_items`	resize canvas items	callHost(resizeCanvasItems)
`containd_sort_all_canvas_items`	sort all canvas items	Sort tab: reorder every child of the bound canvas into a balanced grid. Spacing uses canvas defaults. Width/height appear only for “use custom size”. Match-size plug appears only for “match selected item” (numeric id or ItemRef). Not grid indices.
`containd_align_layout_all_canvas_items`	align layout all canvas items	Align tab: column/row pack or snap-to-grid for every child. Snap size appears only for snap-to-grid. Not edge-align.
`containd_sort_canvas_items`	sort canvas items	Sort a subset. Plug an item-ref list (e.g. child item refs); leave empty = all children. Ids are persistent item ids from ItemRefs — not post-sort grid indices.
`containd_align_layout_canvas_items`	align layout canvas items	Align tab for a subset. Plug an item-ref list; leave empty = all children. Snap size only for snap-to-grid.
`containd_align_canvas_items`	align canvas items	Edge-align items from an item-ref list (e.g. child item refs). Not the Sort/Align modal — use “align all children” for column/row/snap.
`containd_animate_items`	animate items	callHost(animateItems)
`containd_animate_items_to`	animate items to	callHost(animateItems) with runtime target coordinates
`containd_cancel_animation`	cancel animation	callHost(cancelAnimation)
`containd_schedule_repeating`	schedule repeating	callHost(scheduleRepeating)
`containd_schedule_once`	schedule once	callHost(scheduleOnce)
`containd_cancel_schedule`	cancel schedule	callHost(cancelSchedule)
`containd_change_canvas_level`	change canvas level	callHost(changeCanvasLevel)