無障礙輔助

LibreOffice 設計時就非常注重無障礙輔助功能,使其便於使用、易於使用,同時也符合特殊需求人士的使用習慣。您也可以閱讀我們 wiki 中其他有用的無障礙輔助資訊。若您發現功能有所缺失,或有什麼資訊提供不多,請不要猶豫協助我們改善問題,您可以寫封電子郵件到我們的郵遞清單,或是考慮直接參與專案成為貢獻者

下列本頁的各小節:

    1. 鍵盤導覽
    2. 色彩與字型
    3. 輔助科技
    4. 文件
    5. 更多無障礙輔助功能

鍵盤導覽

Full Keyboard Navigation and Control

Full keyboard navigation gives the users the ability to perform all input via a keyboard, without using a mouse or other device.

The features that most-notably enhance accessibility include:

  • Comprehensive definitions of keyboard shortcuts in the different applications;
  • Full keyboard access to toolbars;
  • Keyboard-enabled switching between document windows, menus, toolbars, modeless dialogs and floating windows;
  • Enhanced keyboard navigation in text documents and online help to navigate and activate hyperlinks;
  • Menu and toolbar items for accessing functions which where only accessible via mouse device;
  • Disabled menu items are displayed by default;
  • You can access help tips via keyboard;
  • You can set the duration for the display of help tips;
  • Keyboard access for Drawing Objects:
    • Drawing objects can be inserted via toolbar with default position and size;
    • Each handle of a drawing object can be selected and controlled via keyboard separately, so even polygon manipulation is possible;
  • Particular attention has been given to accessibility in dialog boxes, including:
    • the toolbar customization dialog;
    • extensive CSV import control for spreadsheets.

 

 

色彩與字型

Use of System Color Schemes, High Contrast

LibreOffice adapts to the color schemes and contrast display settings of the operating system.

In addition, LibreOffice offers additional settings for colors which are not specified in any system color schemes, as well as the possibility to overwrite colors from the current color scheme. You can also create and store your own color schemes in LibreOffice.

The help system respects the colors from the current color scheme, but also provides different predefined styles. Users can customize the formatting of the help content via the XSL transformation file, as well as via the custom style sheet file located in the help directory.

Automatic Text Color

All LibreOffice applications support automatic text color for documents and use this by default, so the text is always distinguishable from the background color.

The text will be displayed in the system text color. If this leads to dark text on a dark background, or bright text on a bright background, the text will switch to black or white (according to whichever provides better contrast).

For reading old or imported documents which use hard-formatted text colors, you can use the option "Use automatic font color for screen display". All text content as well as table borders and some other elements will be displayed in the automatic font color.

Icons and Bitmaps

LibreOffice has icon sets for small and large toolbar icons in normal and in high contrast mode, so the icons are more easily identifiable in the different modes.

All UI elements displaying a graphic offer an alternative graphic for high contrast mode.

LibreOffice automatically chooses the set of icons and graphics appropriate for the current system settings.

High Contrast Mode for Impress and Draw

Impress and Draw offer a high-contrast mode, in which objects are displayed without fill colors or text colors.

This mode will automatically be used when high contrast is chosen in the system settings. You can turn off this automatic detection in the LibreOffice options under “Accessibility “.

System Font

LibreOffice can use the operating system font for the user interface, so that LibreOffice appears in the same font as your other applications and can be manipulated via the system settings.

There is special handling to ensure that dialogs do not become larger than the screen when schemes with large fonts are chosen.

Other Legibility Features

  • Highlighted toolbar and menu items are easily perceptible;
  • There is distinct highlighting of current column and row in spreadsheets;
  • You can turn on/off animations for graphics and text.

 

 

輔助科技

API for Supporting Assistive Technologies

Assistive Technology (AT) tools such as screen readers and magnifiers, as well as other tools, connect to LibreOffice using the Java Accessibility API (JAA) via the Java Access Bridge for Windows or GNOME.

LibreOffice has a UNO Accessibility API (UAA) in which all elements of the UI and documents expose all the information about themselves and their contents.

UAA and JAA have some advantages over the off-screen models of AT tools or the Microsoft Active Accessibility API (MSAA). UAA and JAA provide extended information for the document content, so AT tools do not have to get information via different proprietary application APIs from various applications, or by hooking into the display drivers.

An enormous effort has been made to have UI elements and document contents fully support the accessibility interfaces; for example: providing text with attributes and character bounds information, and sending all the necessary notifications and providing names and descriptions of controls.

All AT tools which are able to work with Java applications via the Java Access Bridge will also run with LibreOffice.

The Java Accessibility API is supported by the most popular AT tools including:

  • JAWS Screen Reader;
  • ZoomText Screen Reader and Magnifier;
  • Gnopernicus Screen Reader and Magnifier;
  • GNOME On Screen Keyboard (GOK).

Some AT tools send key events to the applications via the message loop, or simply control the mouse, so it makes no difference for the application if the input comes from a user or from an AT tool.

This way, a lot of AT tools such as simple on-screen keyboards, head mice, eye tracking devices and single switches can be used with LibreOffice.

Support for Comfortable Reading of Read-Only Documents

Screen reader users sometimes have difficulty reading read-only documents because they cannot navigate with the cursor through the document.

For this, there is the feature "Use text selection cursor in read-only text documents".

Other AT features

  • Floating windows, dialogs and menus are system windows;
  • Every individual drawing object can have a name;
  • All sample documents and templates are enhanced to provide names and descriptions for drawing objects.

 

 

文件

Accessible Documentation

All user documentation is provided in ODT and PDF formats so users can use screen readers and magnifiers to read the documentation. For more information about user documentation, please visit the Documentation page on this site, or the Documentation page on our wiki.

All keyboard shortcuts are documented in the online help.

Accessible Online Help

The online help provides information on how to use all the accessibility features in LibreOffice.

The online help is accessible itself. Users can access it using screen readers, magnifiers and on-screen keyboards.

 

 

更多無障礙輔助功能

Other features helpful for accessibility are also available:

  • Zoom in or zoom out in a document;
  • Position mouse to default button or center in dialogs;
  • Configuration:
    • Assign a shortcut key to a command;
    • Show all commands on menus;
    • Change the size of toolbar buttons;
    • Customize menus and toolbars;
    • Display or hide a toolbar;
    • Create a custom toolbar;
  • Task automation:
    • Correct misspelled words as you type;
    • Quickly set AutoCorrect and Paste options;
    • Add AutoCorrect entries for misspellings and typing errors;
    • Use AutoComplete;
    • Automatically make AutoText entries for frequently-used text.

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