new readme. see #143.
This commit is contained in:
Christopher Jeffrey
parent
ebdd1940fe
commit
3dd3f22820
821
README.md
821
README.md
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@ -131,44 +131,88 @@ box.focus();
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screen.render();
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```
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## API Documentation
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## Documentation
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### Widgets
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- [Base Nodes](#base-nodes)
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- [Node](#node-from-eventemitter) (abstract)
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- [Screen](#screen-from-node)
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- [Element](#element-from-node) (abstract)
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- [Boxes](#boxes)
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- [Box](#box-from-element)
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- [Text](#text-from-element)
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- [Line](#line-from-box)
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- [ScrollableBox](#scrollablebox-from-box) (deprecated)
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- [ScrollableText](#scrollabletext-from-scrollablebox) (deprecated)
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- [Lists](#lists)
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- [List](#list-from-box)
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- [FileManager](#filemanager-from-list)
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- [ListTable](#listtable-from-list)
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- [Listbar](#listbar-from-box)
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- [Forms](#forms)
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- [Form](#form-from-box)
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- [Input](#input-from-box) (abstract)
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- [Textarea](#textarea-from-input)
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- [Textbox](#textbox-from-textarea)
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- [Button](#button-from-input)
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- [Checkbox](#checkbox-from-input)
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- [RadioSet](#radioset-from-box)
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- [RadioButton](#radiobutton-from-checkbox)
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- [Prompts](#prompts)
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- [Prompt](#prompt-from-box)
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- [Question](#question-from-box)
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- [Message](#message-from-box)
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- [Loading](#loading-from-box)
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- [Data Display](#data-display)
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- [ProgressBar](#progressbar-from-input)
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- [Log](#log-from-scrollabletext)
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- [Table](#table-from-box)
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- [Special Elements](#special-elements)
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- [Terminal](#terminal-from-box)
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- [Image](#image-from-box)
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- [Layout](#layout-from-element)
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### Other
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- [Helpers](#helpers)
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### Mechanics
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- [Content & Tags](#content--tags)
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- [Colors](#colors)
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- [Attributes](#attributes)
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- [Alignment](#alignment)
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- [Escaping](#escaping)
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- [SGR Sequences](#sgr-sequences)
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- [Style](#style)
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- [Colors](#colors-1)
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- [Attributes](#attributes-1)
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- [Transparency](#transparency)
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- [Shadow](#shadow)
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- [Effects](#effects)
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- [Events](#events)
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- [Event Bubbling](#event-bubbling)
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- [Poisitioning](#positioning)
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- [Rendering](#rendering)
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- [Artificial Cursors](#artificial-cursors)
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### Notes
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- [Windows Compatibility](#windows-compatibility)
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- [Low-level Usage](#low-level-usage)
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- [Testing](#testing)
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- [Examples](#examples)
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- [FAQ](#faq)
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## Widgets
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Blessed comes with a number of high-level widgets so you can avoid all the
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nasty low-level terminal stuff.
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- [Node](#node-from-eventemitter)
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- [Screen](#screen-from-node)
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- [Element](#element-from-node)
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- [Box](#box-from-element)
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- [Text](#text-from-element)
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- [Line](#line-from-box)
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- [ScrollableBox](#scrollablebox-from-box)
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- [ScrollableText](#scrollabletext-from-scrollablebox)
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- [List](#list-from-box)
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- [Form](#form-from-box)
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- [Input](#input-from-box)
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- [Textarea](#textarea-from-input)
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- [Textbox](#textbox-from-textarea)
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- [Button](#button-from-input)
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- [ProgressBar](#progressbar-from-input)
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- [FileManager](#filemanager-from-list)
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- [Checkbox](#checkbox-from-input)
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- [RadioSet](#radioset-from-box)
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- [RadioButton](#radiobutton-from-checkbox)
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- [Prompt](#prompt-from-box)
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- [Question](#question-from-box)
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- [Message](#message-from-box)
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- [Loading](#loading-from-box)
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- [Listbar](#listbar-from-box)
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- [Log](#log-from-scrollabletext)
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- [Table](#table-from-box)
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- [ListTable](#listtable-from-list)
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- [Terminal](#terminal-from-box)
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- [Image](#image-from-box)
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- [Layout](#layout-from-element)
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### Base Nodes
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#### Node (from EventEmitter)
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@ -247,13 +291,12 @@ The screen on which every other node renders.
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- __autoPadding__ - automatically position child elements with border and
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padding in mind (__NOTE__: this is a recommended option. it may become
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default in the future).
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- __artificialCursor__ - have blessed draw a custom cursor and hide the
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- __cursor.artificial__ - have blessed draw a custom cursor and hide the
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terminal cursor (__experimental__).
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- __cursorShape__ - shape of the artificial cursor. can be: block, underline,
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or line.
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- __cursorBlink__ - whether the artificial cursor blinks.
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- __cursorColor__ - color of the artificial color. accepts any valid color
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value (`null` is default).
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- __cursor.shape__ - shape of the cursor. can be: block, underline, or line.
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- __cursor.blink__ - whether the cursor blinks.
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- __cursor.color__ - color of the color. accepts any valid color value (`null`
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is default).
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- __log__ - create a log file. see `log` method.
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- __dump__ - dump all output and input to desired file. can be used together
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with `log` option if set as a boolean.
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@ -370,9 +413,12 @@ The screen on which every other node renders.
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- __insertTop(top, bottom)__ - insert a line at the top of the screen.
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- __deleteBottom(top, bottom)__ - delete a line at the bottom of the screen.
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- __deleteTop(top, bottom)__ - delete a line at the top of the screen.
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- __enableMouse([el])__ - enable mouse events for the screen and optionally an element (automatically called when a form of on('mouse') is bound).
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- __enableKeys([el])__ - enable keypress events for the screen and optionally an element (automatically called when a form of on('keypress') is bound).
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- __enableInput([el])__ - enable key and mouse events. calls bot enableMouse and enableKeys.
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- __enableMouse([el])__ - enable mouse events for the screen and optionally an
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element (automatically called when a form of on('mouse') is bound).
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- __enableKeys([el])__ - enable keypress events for the screen and optionally
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an element (automatically called when a form of on('keypress') is bound).
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- __enableInput([el])__ - enable key and mouse events. calls bot enableMouse
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and enableKeys.
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- __copyToClipboard(text)__ - attempt to copy text to clipboard using iTerm2's
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proprietary sequence. returns true if successful.
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- __cursorShape(shape, blink)__ - attempt to change cursor shape. will not work
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@ -525,9 +571,12 @@ The base element.
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similar to the "title" DOM attribute in the browser.
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example options: `{text:'foo'}`
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- __removeHover()__ - remove the hover label completely.
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- __enableMouse()__ - enable mouse events for the element (automatically called when a form of on('mouse') is bound).
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- __enableKeys()__ - enable keypress events for the element (automatically called when a form of on('keypress') is bound).
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- __enableInput()__ - enable key and mouse events. calls bot enableMouse and enableKeys.
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- __enableMouse()__ - enable mouse events for the element (automatically called
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when a form of on('mouse') is bound).
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- __enableKeys()__ - enable keypress events for the element (automatically
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called when a form of on('keypress') is bound).
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- __enableInput()__ - enable key and mouse events. calls bot enableMouse and
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enableKeys.
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- __enableDrag()__ - enable dragging of the element.
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- __disableDrag()__ - disable dragging of the element.
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- __screenshot([xi, xl, yi, yl])__ - take an SGR screenshot of the element
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codes.
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### Boxes
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#### Box (from Element)
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A box element which draws a simple box containing `content` or other elements.
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@ -698,6 +750,9 @@ pre-existing newlines and escape codes.
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- inherits all from ScrollableBox.
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### Lists
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#### List (from Box)
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A scrollable list which can display selectable items.
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@ -762,6 +817,107 @@ A scrollable list which can display selectable items.
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content.
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#### FileManager (from List)
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A very simple file manager for selecting files.
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##### Options:
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- inherits all from List.
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- __cwd__ - current working directory.
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##### Properties:
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- inherits all from List.
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- __cwd__ - current working directory.
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##### Events:
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- inherits all from List.
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- __cd__ - directory was selected and navigated to.
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- __file__ - file was selected.
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##### Methods:
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- inherits all from List.
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- __refresh([cwd], [callback])__ - refresh the file list (perform a `readdir` on `cwd`
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and update the list items).
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- __pick([cwd], callback)__ - pick a single file and return the path in the callback.
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- __reset([cwd], [callback])__ - reset back to original cwd.
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#### ListTable (from List)
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A stylized table of text elements with a list.
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##### Options:
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- inherits all from List.
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- __rows/data__ - array of array of strings representing rows.
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- __pad__ - spaces to attempt to pad on the sides of each cell. `2` by default:
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one space on each side (only useful if the width is shrunken).
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- __noCellBorders__ - do not draw inner cells.
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- __style.header__ - header style.
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- __style.cell__ - cell style.
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##### Properties:
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- inherits all from List.
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##### Events:
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- inherits all from List.
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##### Methods:
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- inherits all from List.
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- __setRows/setData(rows)__ - set rows in table. array of arrays of strings.
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``` js
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table.setData([
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[ 'Animals', 'Foods' ],
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[ 'Elephant', 'Apple' ],
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[ 'Bird', 'Orange' ]
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]);
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```
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#### Listbar (from Box)
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A horizontal list. Useful for a main menu bar.
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##### Options:
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- inherits all from Box.
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- __style.selected__ - style for a selected item.
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- __style.item__ - style for an unselected item.
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- __commands/items__ - set buttons using an object with keys as titles of
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buttons, containing of objects containing keys of `keys` and `callback`.
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- __autoCommandKeys__ - automatically bind list buttons to keys 0-9.
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##### Properties:
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- inherits all from Box.
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##### Events:
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- inherits all from Box.
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##### Methods:
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- inherits all from Box.
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- __setItems(commands)__ - set commands (see `commands` option above).
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- __add/addItem/appendItem(item, callback)__ - append an item to the bar.
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- __select(offset)__ - select an item on the bar.
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- __removeItem(child)__ - remove item from the bar.
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- __move(offset)__ - move relatively across the bar.
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- __moveLeft(offset)__ - move left relatively across the bar.
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- __moveRight(offset)__ - move right relatively across the bar.
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- __selectTab(index)__ - select button and execute its callback.
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### Forms
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#### Form (from Box)
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A form which can contain form elements.
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@ -886,68 +1042,6 @@ A button which can be focused and allows key and mouse input.
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- __press()__ - press button. emits `press`.
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#### ProgressBar (from Input)
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A progress bar allowing various styles. This can also be used as a form input.
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##### Options:
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- inherits all from Input.
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- __orientation__ - can be `horizontal` or `vertical`.
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- __style.bar__ - style of the bar contents itself.
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- __pch__ - the character to fill the bar with (default is space).
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- __filled__ - the amount filled (0 - 100).
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- __value__ - same as `filled`.
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- __keys__ - enable key support.
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- __mouse__ - enable mouse support.
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##### Properties:
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- inherits all from Input.
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##### Events:
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- inherits all from Input.
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- __reset__ - bar was reset.
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- __complete__ - bar has completely filled.
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##### Methods:
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- inherits all from Input.
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- __progress(amount)__ - progress the bar by a fill amount.
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- __setProgress(amount)__ - set progress to specific amount.
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- __reset()__ - reset the bar.
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#### FileManager (from List)
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A very simple file manager for selecting files.
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##### Options:
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- inherits all from List.
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- __cwd__ - current working directory.
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##### Properties:
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- inherits all from List.
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- __cwd__ - current working directory.
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##### Events:
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- inherits all from List.
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- __cd__ - directory was selected and navigated to.
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- __file__ - file was selected.
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##### Methods:
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- inherits all from List.
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- __refresh([cwd], [callback])__ - refresh the file list (perform a `readdir` on `cwd`
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and update the list items).
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- __pick([cwd], callback)__ - pick a single file and return the path in the callback.
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- __reset([cwd], [callback])__ - reset back to original cwd.
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#### Checkbox (from Input)
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A checkbox which can be used in a form element.
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@ -1023,6 +1117,9 @@ A radio button which can be used in a form element.
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- inherits all from Checkbox.
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### Prompts
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#### Prompt (from Box)
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A prompt box containing a text input, okay, and cancel buttons (automatically
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@ -1119,38 +1216,40 @@ A box with a spinning line to denote loading (automatically hidden).
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- __stop()__ - hide loading box. unlock keys.
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#### Listbar (from Box)
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### Data Display
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A horizontal list. Useful for a main menu bar.
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#### ProgressBar (from Input)
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A progress bar allowing various styles. This can also be used as a form input.
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##### Options:
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- inherits all from Box.
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- __style.selected__ - style for a selected item.
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- __style.item__ - style for an unselected item.
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- __commands/items__ - set buttons using an object with keys as titles of
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buttons, containing of objects containing keys of `keys` and `callback`.
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- __autoCommandKeys__ - automatically bind list buttons to keys 0-9.
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- inherits all from Input.
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- __orientation__ - can be `horizontal` or `vertical`.
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- __style.bar__ - style of the bar contents itself.
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- __pch__ - the character to fill the bar with (default is space).
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- __filled__ - the amount filled (0 - 100).
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- __value__ - same as `filled`.
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- __keys__ - enable key support.
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- __mouse__ - enable mouse support.
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##### Properties:
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- inherits all from Box.
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- inherits all from Input.
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##### Events:
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|
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- inherits all from Box.
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- inherits all from Input.
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- __reset__ - bar was reset.
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- __complete__ - bar has completely filled.
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##### Methods:
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- inherits all from Box.
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- __setItems(commands)__ - set commands (see `commands` option above).
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- __add/addItem/appendItem(item, callback)__ - append an item to the bar.
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- __select(offset)__ - select an item on the bar.
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- __removeItem(child)__ - remove item from the bar.
|
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- __move(offset)__ - move relatively across the bar.
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- __moveLeft(offset)__ - move left relatively across the bar.
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- __moveRight(offset)__ - move right relatively across the bar.
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- __selectTab(index)__ - select button and execute its callback.
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- inherits all from Input.
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- __progress(amount)__ - progress the bar by a fill amount.
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- __setProgress(amount)__ - set progress to specific amount.
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- __reset()__ - reset the bar.
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|
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#### Log (from ScrollableText)
|
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|
|
@ -1218,39 +1317,7 @@ A stylized table of text elements.
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```
|
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|
||||
|
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#### ListTable (from List)
|
||||
|
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A stylized table of text elements with a list.
|
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|
||||
##### Options:
|
||||
|
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- inherits all from List.
|
||||
- __rows/data__ - array of array of strings representing rows.
|
||||
- __pad__ - spaces to attempt to pad on the sides of each cell. `2` by default:
|
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one space on each side (only useful if the width is shrunken).
|
||||
- __noCellBorders__ - do not draw inner cells.
|
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- __style.header__ - header style.
|
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- __style.cell__ - cell style.
|
||||
|
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##### Properties:
|
||||
|
||||
- inherits all from List.
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|
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##### Events:
|
||||
|
||||
- inherits all from List.
|
||||
|
||||
##### Methods:
|
||||
|
||||
- inherits all from List.
|
||||
- __setRows/setData(rows)__ - set rows in table. array of arrays of strings.
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``` js
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table.setData([
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[ 'Animals', 'Foods' ],
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[ 'Elephant', 'Apple' ],
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[ 'Bird', 'Orange' ]
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]);
|
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```
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### Special Elements
|
||||
|
||||
|
||||
#### Terminal (from Box)
|
||||
|
|
@ -1301,8 +1368,10 @@ terminals.
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- inherits all from Box.
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- __file__ - path to image.
|
||||
- __w3m__ - path to w3mimgdisplay. if a proper w3mimgdisplay path is not given,
|
||||
blessed will search the entire disk for the binary.
|
||||
- __w3m__ - path to w3mimgdisplay. if a proper `w3mimgdisplay` path is not
|
||||
given, blessed will search the entire disk for the binary.
|
||||
- __search__ - whether to search `/usr`, `/bin`, and `/lib` for
|
||||
`w3mimgdisplay` (default: `true`).
|
||||
|
||||
##### Properties:
|
||||
|
||||
|
|
@ -1496,44 +1565,278 @@ for (var i = 0; i < 10; i++) {
|
|||
```
|
||||
|
||||
|
||||
### Artificial Cursors
|
||||
### Other
|
||||
|
||||
Terminal cursors can be tricky. They all have different custom escape codes to
|
||||
alter. As an _experimental_ alternative, blessed can draw a cursor for you,
|
||||
allowing you to have a custom cursor that you control.
|
||||
|
||||
#### Helpers
|
||||
|
||||
All helpers reside on `blessed.helpers` or `blessed`.
|
||||
|
||||
- __merge(a, b)__ - Merge objects `a` and `b` into object `a`.
|
||||
- __asort(obj)__ - Sort array alphabetically by `name` prop.
|
||||
- __hsort(obj)__ - Sort array numerically by `index` prop.
|
||||
- __findFile(start, target)__ - Find a file at `start` directory with name
|
||||
`target`.
|
||||
- __escape(text)__ - escape content's tags to be passed into `el.setContent()`.
|
||||
Example: `box.setContent('escaped tag: ' + blessed.escape('{bold}{/bold}'));`
|
||||
- __parseTags(text)__ - Parse tags into SGR escape codes.
|
||||
- __generateTags(style, text)__ - Generate text tags based on `style` object.
|
||||
- __attrToBinary(style, element)__ - Convert `style` attributes to binary
|
||||
format.
|
||||
- __stripTags(text)__ - Strip text of tags and SGR sequences.
|
||||
- __cleanTags(text)__ - Strip text of tags, SGR escape code, and
|
||||
leading/trailing whitespace.
|
||||
- __dropUnicode(text)__ - Drop text of any >U+FFFF characters.
|
||||
|
||||
|
||||
### Mechanics
|
||||
|
||||
|
||||
#### Content & Tags
|
||||
|
||||
Every element can have text content via `setContent`. If `tags: true` was
|
||||
passed to the element's constructor, the content can contain tags. For example:
|
||||
|
||||
``` js
|
||||
var screen = blessed.screen({
|
||||
cursor: {
|
||||
artificial: true,
|
||||
shape: 'line',
|
||||
blink: true,
|
||||
color: null // null for default
|
||||
}
|
||||
});
|
||||
box.setContent('hello {red-fg}{green-bg}{bold}world{/bold}{/green-bg}{/red-fg}');
|
||||
```
|
||||
|
||||
That's it. It's controlled the same way as the regular cursor.
|
||||
|
||||
To create a custom cursor:
|
||||
To make this more concise `{/}` cancels all character attributes.
|
||||
|
||||
``` js
|
||||
var screen = blessed.screen({
|
||||
cursor: {
|
||||
artificial: true,
|
||||
shape: {
|
||||
bg: 'red',
|
||||
fg: 'white',
|
||||
bold: true,
|
||||
ch: '#'
|
||||
box.setContent('hello {red-fg}{green-bg}{bold}world{/}');
|
||||
```
|
||||
|
||||
|
||||
##### Colors
|
||||
|
||||
Blessed tags support the basic 16 colors for colors, as well as up to 256
|
||||
colors.
|
||||
|
||||
``` js
|
||||
box.setContent('hello {red-fg}{green-bg}world{/}');
|
||||
```
|
||||
|
||||
Tags can also use hex colors (which will be reduced to the most accurate
|
||||
terminal color):
|
||||
|
||||
``` js
|
||||
box.setContent('hello {#ff0000-fg}{#00ff00-bg}world{/}');
|
||||
```
|
||||
|
||||
|
||||
##### Attributes
|
||||
|
||||
Blessed supports all terminal attributes, including `bold`, `underline`,
|
||||
`blink`, `inverse`, and `invisible`.
|
||||
|
||||
``` js
|
||||
box.setContent('hello {bold}world{/bold}');
|
||||
```
|
||||
|
||||
|
||||
##### Alignment
|
||||
|
||||
Newlines and alignment are also possible in content.
|
||||
|
||||
``` js
|
||||
box.setContent('hello\n'
|
||||
+ '{right}world{/right}\n'
|
||||
+ '{center}foo{/center}\n');
|
||||
+ 'left{|}right');
|
||||
```
|
||||
|
||||
This will produce a box that looks like:
|
||||
|
||||
```
|
||||
| hello |
|
||||
| world |
|
||||
| foo |
|
||||
| left right |
|
||||
```
|
||||
|
||||
|
||||
##### Escaping
|
||||
|
||||
Escaping can either be done using `blessed.escape()`
|
||||
|
||||
```
|
||||
box.setContent('here is an escaped tag: ' + blessed.escape('{bold}{/bold}'));
|
||||
```
|
||||
|
||||
Or with the special `{open}` and `{close}` tags:
|
||||
|
||||
```
|
||||
box.setContent('here is an escaped tag: {open}bold{close}{open}/bold{close}');
|
||||
```
|
||||
|
||||
Either will produce:
|
||||
|
||||
```
|
||||
here is an escaped tag: {bold}{/bold}
|
||||
```
|
||||
|
||||
|
||||
##### SGR Sequences
|
||||
|
||||
Content can also handle SGR escape codes. This means if you got output from a
|
||||
program, say `git log` for example, you can feed it directly to an element's
|
||||
content and the colors will be parsed appropriately.
|
||||
|
||||
This means that while `{red-fg}foo{/red-fg}` produces `^[[31mfoo^[[39m`, you
|
||||
could just feed `^[[31mfoo^[[39m` directly to the content.
|
||||
|
||||
|
||||
#### Style
|
||||
|
||||
The style option controls most of the visual aspects of an element.
|
||||
|
||||
``` js
|
||||
style: {
|
||||
fg: 'blue',
|
||||
bg: 'black',
|
||||
bold: true,
|
||||
underline: false,
|
||||
blink: false,
|
||||
inverse: false,
|
||||
invisible: false,
|
||||
transparent: false,
|
||||
border: {
|
||||
fg: 'blue',
|
||||
bg: 'red'
|
||||
},
|
||||
blink: true
|
||||
scrollbar: {
|
||||
bg: 'blue'
|
||||
},
|
||||
focus: {
|
||||
bg: 'red'
|
||||
},
|
||||
hover: {
|
||||
bg: 'red'
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
##### Colors
|
||||
|
||||
Colors can be the names of any of the 16 basic terminal colors, along with hex
|
||||
values (e.g. `#ff0000`) for 256 color terminals. If 256 or 88 colors is not
|
||||
supported. Blessed with reduce the color to whatever is available.
|
||||
|
||||
|
||||
##### Attributes
|
||||
|
||||
Blessed supports all terminal attributes, including `bold`, `underline`,
|
||||
`blink`, `inverse`, and `invisible`. Attributes are represented as bools in the
|
||||
`style` object.
|
||||
|
||||
|
||||
##### Transparency
|
||||
|
||||
Blessed can set the opacity of an element to 50% using `style.transparent =
|
||||
true;`. While this seems like it normally shouldn't be possible in a terminal,
|
||||
blessed will use a color blending algorithm to blend the element of the
|
||||
foremost element with the background behind it. Obviously characters cannot be
|
||||
blended, but background colors can.
|
||||
|
||||
|
||||
##### Shadow
|
||||
|
||||
Translucent shadows are also an option when it comes to styling an element.
|
||||
This option will create a 50% opacity 2-cell wide, 1-cell high shadow offset to
|
||||
the bottom-right.
|
||||
|
||||
``` js
|
||||
shadow: true
|
||||
```
|
||||
|
||||
|
||||
##### Effects
|
||||
|
||||
Blessed supports hover and focus styles. (Hover is only useful is mouse input
|
||||
is enabled).
|
||||
|
||||
``` js
|
||||
style: {
|
||||
hover: {
|
||||
bg: 'red'
|
||||
},
|
||||
focus: {
|
||||
border: {
|
||||
fg: 'blue'
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
##### Scrollbar
|
||||
|
||||
On scrollable elements, blessed will support style options for the scrollbar,
|
||||
such as:
|
||||
|
||||
``` js
|
||||
style: {
|
||||
scrollbar: {
|
||||
bg: 'red',
|
||||
fg: 'blue'
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
As a main option, scrollbar will either take a bool or an object:
|
||||
|
||||
``` js
|
||||
scrollbar: {
|
||||
ch: ' '
|
||||
}
|
||||
```
|
||||
|
||||
Or:
|
||||
|
||||
``` js
|
||||
scrollbar: true
|
||||
```
|
||||
|
||||
|
||||
#### Events
|
||||
|
||||
Events in Blessed work similar to the traditional node.js model, with one
|
||||
important difference: they have a concept of a tree and event bubbling.
|
||||
|
||||
|
||||
##### Event Bubbling
|
||||
|
||||
Events can bubble in blessed. For example:
|
||||
|
||||
Receiving all click events for `box` (a normal event listener):
|
||||
|
||||
``` js
|
||||
box.on('click', function(mouse) {
|
||||
box.setContent('You clicked ' + mouse.x + ', ' + mouse.y + '.');
|
||||
screen.render();
|
||||
});
|
||||
```
|
||||
|
||||
Receiving all click events for `box`, as well as all of its children:
|
||||
|
||||
``` js
|
||||
box.on('element click', function(el, mouse) {
|
||||
box.setContent('You clicked '
|
||||
+ el.type + ' at ' + mouse.x + ', ' + mouse.y + '.');
|
||||
screen.render();
|
||||
if (el === box) {
|
||||
return false; // Cancel propagation.
|
||||
}
|
||||
});
|
||||
```
|
||||
|
||||
`el` gets passed in as the first argument. It refers to the target element the
|
||||
event occurred on. Returning `false` will cancel propagation up the tree.
|
||||
|
||||
### Positioning
|
||||
|
||||
#### Positioning
|
||||
|
||||
Offsets may be a number, a percentage (e.g. `50%`), or a keyword (e.g.
|
||||
`center`).
|
||||
|
|
@ -1581,90 +1884,13 @@ console.log(box.aleft);
|
|||
console.log(box.atop);
|
||||
```
|
||||
|
||||
#### Overlapping offsets and dimensions greater than parents'
|
||||
|
||||
##### Overlapping offsets and dimensions greater than parents'
|
||||
|
||||
This still needs to be tested a bit, but it should work.
|
||||
|
||||
|
||||
### Content
|
||||
|
||||
Every element can have text content via `setContent`. If `tags: true` was
|
||||
passed to the element's constructor, the content can contain tags. For example:
|
||||
|
||||
``` js
|
||||
box.setContent('hello {red-fg}{green-bg}{bold}world{/bold}{/green-bg}{/red-fg}');
|
||||
```
|
||||
|
||||
To make this more concise `{/}` cancels all character attributes.
|
||||
|
||||
``` js
|
||||
box.setContent('hello {red-fg}{green-bg}{bold}world{/}');
|
||||
```
|
||||
|
||||
Tags can also use hex colors (which will be reduced to the most accurate
|
||||
terminal color):
|
||||
|
||||
``` js
|
||||
box.setContent('{#ff0000-fg}{bold}red and bold{/}');
|
||||
```
|
||||
|
||||
Newlines and alignment are also possible in content.
|
||||
|
||||
``` js
|
||||
box.setContent('hello\n'
|
||||
+ '{right}world{/right}\n'
|
||||
+ '{center}foo{/center}\n');
|
||||
+ 'left{|}right');
|
||||
```
|
||||
|
||||
This will produce a box that looks like:
|
||||
|
||||
```
|
||||
| hello |
|
||||
| world |
|
||||
| foo |
|
||||
| left right |
|
||||
```
|
||||
|
||||
Content can also handle SGR escape codes. This means if you got output from a
|
||||
program, say `git log` for example, you can feed it directly to an element's
|
||||
content and the colors will be parsed appropriately.
|
||||
|
||||
This means that while `{red-fg}foo{/red-fg}` produces `^[[31mfoo^[[39m`, you
|
||||
could just feed `^[[31mfoo^[[39m` directly to the content.
|
||||
|
||||
|
||||
### Event Bubbling
|
||||
|
||||
Events can bubble in blessed. For example:
|
||||
|
||||
Receiving all click events for `box`:
|
||||
|
||||
``` js
|
||||
box.on('click', function(mouse) {
|
||||
box.setContent('You clicked ' + mouse.x + ', ' + mouse.y + '.');
|
||||
screen.render();
|
||||
});
|
||||
```
|
||||
|
||||
Receiving all click events for `box`, as well as all of its children:
|
||||
|
||||
``` js
|
||||
box.on('element click', function(el, mouse) {
|
||||
box.setContent('You clicked '
|
||||
+ el.type + ' at ' + mouse.x + ', ' + mouse.y + '.');
|
||||
screen.render();
|
||||
if (el === box) {
|
||||
return false; // Cancel propagation.
|
||||
}
|
||||
});
|
||||
```
|
||||
|
||||
`el` gets passed in as the first argument. It refers to the target element the
|
||||
event occurred on. Returning `false` will cancel propagation up the tree.
|
||||
|
||||
|
||||
### Rendering
|
||||
#### Rendering
|
||||
|
||||
To actually render the screen buffer, you must call `render`.
|
||||
|
||||
|
|
@ -1678,7 +1904,47 @@ painted first. In terms of the painter's algorithm, the lowest indicies in the
|
|||
array are the furthest away, just like in the DOM.
|
||||
|
||||
|
||||
### Windows compatibility
|
||||
#### Artificial Cursors
|
||||
|
||||
Terminal cursors can be tricky. They all have different custom escape codes to
|
||||
alter. As an _experimental_ alternative, blessed can draw a cursor for you,
|
||||
allowing you to have a custom cursor that you control.
|
||||
|
||||
``` js
|
||||
var screen = blessed.screen({
|
||||
cursor: {
|
||||
artificial: true,
|
||||
shape: 'line',
|
||||
blink: true,
|
||||
color: null // null for default
|
||||
}
|
||||
});
|
||||
```
|
||||
|
||||
That's it. It's controlled the same way as the regular cursor.
|
||||
|
||||
To create a custom cursor:
|
||||
|
||||
``` js
|
||||
var screen = blessed.screen({
|
||||
cursor: {
|
||||
artificial: true,
|
||||
shape: {
|
||||
bg: 'red',
|
||||
fg: 'white',
|
||||
bold: true,
|
||||
ch: '#'
|
||||
},
|
||||
blink: true
|
||||
}
|
||||
});
|
||||
```
|
||||
|
||||
|
||||
### Notes
|
||||
|
||||
|
||||
#### Windows Compatibility
|
||||
|
||||
Currently there is no `mouse` or `resize` event support on Windows.
|
||||
|
||||
|
|
@ -1691,14 +1957,7 @@ var screen = blessed.screen({ term: 'windows-ansi' });
|
|||
```
|
||||
|
||||
|
||||
### Testing
|
||||
|
||||
Most tests contained in the `test/` directory are interactive. It's up to the
|
||||
programmer to determine whether the test is properly displayed. In the future
|
||||
it might be better to do something similar to vttest.
|
||||
|
||||
|
||||
## Lower-Level Usage
|
||||
#### Low-level Usage
|
||||
|
||||
This will actually parse the xterm terminfo and compile every
|
||||
string capability to a javascript function:
|
||||
|
|
@ -1761,7 +2020,19 @@ program.feed();
|
|||
```
|
||||
|
||||
|
||||
## FAQ
|
||||
#### Testing
|
||||
|
||||
Most tests contained in the `test/` directory are interactive. It's up to the
|
||||
programmer to determine whether the test is properly displayed. In the future
|
||||
it might be better to do something similar to vttest.
|
||||
|
||||
|
||||
#### Examples
|
||||
|
||||
Examples can be found in `examples/`.
|
||||
|
||||
|
||||
#### FAQ
|
||||
|
||||
1. Why doesn't the Linux console render lines correctly on Ubuntu?
|
||||
- You need to install the `ncurses-base` package __and__ the `ncurses-term`
|
||||
|
|
|
|||
Loading…
Reference in New Issue