canvas::tag - Easier management of the tags on canvas items or item groups
This package provides utility commands for easier management of the tag lists associated with canvas items or item groups.
The problem with the existing canvas API is that a tag list can only be set as a whole, making adding and removing of tags from such lists relatively complex operations reading the current tag list, modifying it, and then writing the changed list back.
The commands provided by this package hide all this complexity from the user.
This command adds the tags tag... to the tag list for the items identified by the tagOrId in the canvas widget. The new tags are added at the end of the list.
The result of the command is the empty string.
This command adds the tags tag... to the tag list for the items identified by the tagOrId in the canvas widget. The new tags are added at the beginning of the list.
The result of the command is the empty string.
This command adds the tags tag... to the tag list for the items identified by the tagOrId in the canvas widget. The new tags are inserted before the element at index.
index 0 refers to the beginning of the list.
index end refers to after the end of the list.
The result of the command is the empty string.
This command removes the named tags tag... from the tag list for the items identified by the tagOrId in the canvas widget.
The result of the command is the empty string.
This command finds all tags for the items identified by the tagOrId in the canvas widget which match the glob pattern.
The result of the command is a list of the matching tags. Which may be empty.
append tag, canvas, insert tag, remove tag, tags