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evaluator:applicable_contexts:functions:labels
Evaluator Button Labels
In a toolbar or menu button, you can use the @label modifier to set the button label dynamically using the evaluator.
As a very basic example, @label:=return "Hello!"; would set the label to "Hello!".
A number of variables are available to the evaluator in this context. Note that some are only applicable to toolbars in the standalone image viewer, and some only apply to Lister toolbars.
| Variable | Type | Description |
|---|---|---|
dest |
path |
The current destination path. |
dest_shell |
bool |
True if the destination is a shell (virtual) folder hosted by Explorer, otherwise false. |
expanded |
uint |
Returns the number of expanded directories. |
fullscreen |
bool |
Viewer only. True if the viewer is fullscreen, otherwise false. |
key_repeat |
bool |
True if the function was launched from a repeated key press (i.e. the key was held down). |
seldirs |
uint |
Returns the number of selected directories. |
selfiles |
uint |
Returns the number of selected files. |
selimage |
bool |
Viewer only. True if an area of the image has been selected, false otherwise. |
selitems |
uint |
Returns the total number of selected items. |
source |
path |
The current source path. |
source_shell |
bool |
True if the source is a shell (virtual) folder hosted by Explorer, otherwise false. |
totaldirs |
uint |
Returns the total number of directories. |
totalfiles |
uint |
Returns the total number of files. |
totalitems |
uint |
Returns the total number of items. |
viewmode |
str |
Returns the current view mode in the file display. Values are largeicons, smallicons, list, details, power, thumbnails and tiles. |
As well as the above variables, you can also use evaluator functions like IsChecked and IsEnabled to query other information about the state of the Lister.
The original label is available as the original_label variable.
The return value from the evaluation expression will be used as the label for the button.