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term::interact::pager(n) 0.1 tcllib "Terminal control"
term::interact::pager - Terminal widget, paging
This package provides a class for the creation of a simple paging text display.
The package exports a single command, the class command, enabling the creation of pager instances. Its API is:
- term::interact::pager object text ?options...?
This command creates a new pager object with the name object, initializes it, and returns the fully qualified name of the object command as its result.
The argument is the text to show, possibly followed by configuration options and their values. The options are explained in the section Configuration.
The objects created by the class command provide the methods listed below:
- object interact
Show the pager in the screen at the configured location and start interacting with it. This opens its own event loop for the processing of incoming characters. The method returns when the interaction has completed. See section Interaction for a description of the possible interaction.
- object done
This method can be used by user supplied actions to terminate the interaction with the object.
- object clear
This method can be used by user supplied actions to remove the pager from the terminal.
- object text text
This method can be used to change the text shown by the pager. The pager will reset the dispay to show the first line of the text at the top.
- object configure
- object configure option
- object configure option value...
- object cget option
Standard methods to retrieve and configure the options of the pager.
A pager instance recognizes the following options:
A pager object recognizes the control sequences listed below and acts as described. The user can supply more control sequences to act on via the configuration, but is not able to overide these defaults.
- Cursor Up
The text is scrolled down a single line, making one more line visible at the top. The pager will not react if the first line of the text is already shown.
- Cursor Down
The text is scrolled up a single line, making one more line visible at the bottom. The pager will not react if the last line of the text is already shown.
- Page Up
The text is scrolled down a page. The pager will not react if the first line of the text is already shown.
- Page Down
The text is scrolled up a page. The pager will not react if the last line of the text is already shown.
The interaction with the object is terminated.
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