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    This interface defines cross platform (Gecko) roles.
    Gecko 1.9
    Inherits from: nsISupports Last changed in Gecko 2.0 (Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1)


    Constant Value Description
    ROLE_NOTHING 0 Used when accessible has no strong defined role.
    ROLE_TITLEBAR 1 Represents a title or caption bar for a window. It is used by MSAA only, supported automatically by MS Windows.
    ROLE_MENUBAR 2 Represents the menu bar (positioned beneath the title bar of a window) from which menus are selected by the user. The role is used by xul:menubar or role="menubar".
    ROLE_SCROLLBAR 3 Represents a vertical or horizontal scroll bar, which is part of the client area or used in a control.
    ROLE_GRIP 4 Represents a special mouse pointer, which allows a user to manipulate user interface elements such as windows. For example, a user clicks and drags a sizing grip in the lower-right corner of a window to resize it.
    ROLE_SOUND 5 Represents a system sound, which is associated with various system events.
    ROLE_CURSOR 6 Represents the system mouse pointer.
    ROLE_CARET 7 Represents the system caret. The role is supported for caret.
    ROLE_ALERT 8 Represents an alert or a condition that a user should be notified about. Assistive Technologies typically respond to the role by reading the entire on screen contents of containers advertising this role. Should be used for warning dialogs, etc. The role is used by xul:browsermessage, role="alert", xforms:message.
    ROLE_WINDOW 9 Represents the window frame, which contains child objects such as a title bar, client, and other objects contained in a window. The role is supported automatically by MS Windows.
    ROLE_INTERNAL_FRAME 10 A sub-document or iframe.
    ROLE_MENUPOPUP 11 Represents a menu, which presents a list of options from which the user can make a selection to perform an action. It is used for role="menu".
    ROLE_MENUITEM 12 Represents a menu item, which is an entry in a menu that a user can choose to carry out a command, select an option. It is used for xul:menuitem, role="menuitem".
    ROLE_TOOLTIP 13 Represents a ToolTip that provides helpful hints.
    ROLE_APPLICATION 14 Represents a main window for an application. It is used for role="application". Also refer to ROLE_APP_ROOT.
    ROLE_DOCUMENT 15 Represents a document window. A document window is always contained within an application window. It is used for role="document".
    ROLE_PANE 16 Represents a pane within a frame or document window. Users can navigate between panes and within the contents of the current pane, but cannot navigate between items in different panes. Thus, panes represent a level of grouping lower than frame windows or documents, but above individual controls. It is used for the first child of a or iframe.
    ROLE_CHART 17 Represents a graphical image used to represent data.
    ROLE_DIALOG 18 Represents a dialog box or message box. It is used for xul:dialog, role="dialog".
    ROLE_BORDER 19 Represents a window border.
    ROLE_GROUPING 20 Logically groups other objects. There is not always a parent-child relationship between the grouping object and the objects it contains. It is used for html:textfield, xul:groupbox, role="group".
    ROLE_SEPARATOR 21 Used to visually divide a space into two regions, such as a separator menu item or a bar that divides split panes within a window. It is used for xul:separator, html:hr, role="separator".
    ROLE_TOOLBAR 22 Represents a toolbar, which is a grouping of controls (push buttons or toggle buttons) that provides easy access to frequently used features. It is used for xul:toolbar, role="toolbar".
    ROLE_STATUSBAR 23 Represents a status bar, which is an area at the bottom of a window that displays information about the current operation, state of the application, or selected object. The status bar has multiple fields, which display different kinds of information. It is used for xul:statusbar.
    ROLE_TABLE 24 Represents a table that contains rows and columns of cells, and optionally, row headers and column headers. It is used for html:table, role="grid". Also refer to the following roles: ROLE_COLUMNHEADER, ROLE_ROWHEADER, ROLE_COLUMN, ROLE_ROW, ROLE_CELL.
    ROLE_COLUMNHEADER 25 Represents a column header, providing a visual label for a column in a table. It is used for XUL tree column headers, html:th, role="colheader". Also refer to ROLE_TABLE.
    ROLE_ROWHEADER 26 Represents a row header, which provides a visual label for a table row. It is used for role="rowheader". Also, see ROLE_TABLE.
    ROLE_COLUMN 27 Represents a column of cells within a table. Also, see ROLE_TABLE.
    ROLE_ROW 28 Represents a row of cells within a table. Also, see ROLE_TABLE.
    ROLE_CELL 29 Represents a cell within a table. It is used for html:td, xul:tree cell and xul:listcell. Also, see ROLE_TABLE.
    ROLE_LINK 30 Represents a link to something else. This object might look like text or a graphic, but it acts like a button. It is used for xul:label@class="text-link", html:a, html:area, xforms:trigger@appearance="minimal".
    ROLE_HELPBALLOON 31 Displays a Help topic in the form of a ToolTip or Help balloon.
    ROLE_CHARACTER 32 Represents a cartoon-like graphic object, such as Microsoft Office Assistant, which is displayed to provide help to users of an application.
    ROLE_LIST 33 Represents a list box, allowing the user to select one or more items. It is used for xul:listbox, html:select@size, role="list". See also ROLE_LIST_ITEM.
    ROLE_LISTITEM 34 Represents an item in a list. See also ROLE_LIST.
    ROLE_OUTLINE 35 Represents an outline or tree structure, such as a tree view control, that displays a hierarchical list and allows the user to expand and collapse branches. Is is used for role="tree".
    ROLE_OUTLINEITEM 36 Represents an item in an outline or tree structure. It is used for role="treeitem".
    ROLE_PAGETAB 37 Represents a page tab, it is a child of a page tab list. It is used for xul:tab, role="treeitem". Also refer to ROLE_PAGETABLIST.
    ROLE_PROPERTYPAGE 38 Represents a property sheet. It is used for xul:tabpanel, role="tabpanel".
    ROLE_INDICATOR 39 Represents an indicator, such as a pointer graphic, that points to the current item.
    ROLE_GRAPHIC 40 Represents a picture. Is is used for xul:image, html:img.
    ROLE_STATICTEXT 41 Represents read-only text, such as labels for other controls or instructions in a dialog box. Static text cannot be modified or selected. Is is used for xul:label, xul:description, html:label, role="label", or xforms:output.
    ROLE_TEXT_LEAF 42 Represents selectable text that allows edits or is designated read-only.
    ROLE_PUSHBUTTON 43 Represents a push button control. It is used for xul:button, html:button, role="button", xforms:trigger, xforms:submit.
    ROLE_CHECKBUTTON 44 Represents a check box control. It is used for xul:checkbox, html:input@type="checkbox", role="checkbox", boolean xforms:input.
    ROLE_RADIOBUTTON 45 Represents an option button, also called a radio button. It is one of a group of mutually exclusive options. All objects sharing a single parent that have this attribute are assumed to be part of single mutually exclusive group. It is used for xul:radio, html:input@type="radio", role="radio".
    ROLE_COMBOBOX 46 Represents a combo box; an edit control with an associated list box that provides a set of predefined choices. It is used for html:select, xul:menulist, role="combobox".
    ROLE_DROPLIST 47 Represents the calendar control. It is used for date xforms:input.
    ROLE_PROGRESSBAR 48 Represents a progress bar, dynamically showing the user the percent complete of an operation in progress. It is used for xul:progressmeter, role="progressbar".
    ROLE_DIAL 49 Represents a dial or knob whose purpose is to allow a user to set a value.
    ROLE_HOTKEYFIELD 50 Represents a hot-key field that allows the user to enter a combination or sequence of keystrokes.
    ROLE_SLIDER 51 Represents a slider, which allows the user to adjust a setting in given increments between minimum and maximum values. It is used by xul:scale, role="slider", xforms:range.
    ROLE_SPINBUTTON 52 Represents a spin box, which is a control that allows the user to increment or decrement the value displayed in a separate "buddy" control associated with the spin box. It is used for xul:spinbuttons.
    ROLE_DIAGRAM 53 Represents a graphical image used to diagram data. It is used for svg:svg.
    ROLE_ANIMATION 54 Represents an animation control, which contains content that changes over time, such as a control that displays a series of bitmap frames.
    ROLE_EQUATION 55 Represents a mathematical equation. It is used by MATHML, where there is a rich DOM subtree for an equation. Use ROLE_FLAT_EQUATION for [TeX]
    ROLE_BUTTONDROPDOWN 56 Represents a button that drops down a list of items.
    ROLE_BUTTONMENU 57 Represents a button that drops down a menu.
    ROLE_BUTTONDROPDOWNGRID 58 Represents a button that drops down a grid. It is used for xul:colorpicker.
    ROLE_WHITESPACE 59 Represents blank space between other objects.
    ROLE_PAGETABLIST 60 Represents a container of page tab controls. Is it used for xul:tabs, DHTML: role="tabs". Also refer to ROLE_PAGETAB.
    ROLE_CLOCK 61 Represents a control that displays time.
    ROLE_SPLITBUTTON 62 Represents a button on a toolbar that has a drop-down list icon directly adjacent to the button.
    ROLE_IPADDRESS 63 Represents an edit control designed for an Internet Protocol (IP) address. The edit control is divided into sections for the different parts of the IP address.
    ROLE_ACCEL_LABEL 64 Represents a label control that has an accelerator.
    ROLE_ARROW 65 Represents an arrow in one of the four cardinal directions.
    ROLE_CANVAS 66 Represents a control that can be drawn into and is used to trap events. It is used for html:canvas.
    ROLE_CHECK_MENU_ITEM 67 Represents a menu item with a check box.
    ROLE_COLOR_CHOOSER 68 Represents a specialized dialog that lets the user choose a color.
    ROLE_DATE_EDITOR 69 Represents control whose purpose is to allow a user to edit a date.
    ROLE_DESKTOP_ICON 70 An iconified internal frame in an ROLE_DESKTOP_PANE. Also refer to ROLE_INTERNAL_FRAME.
    ROLE_DESKTOP_FRAME 71 A desktop pane. A pane that supports internal frames and iconified versions of those internal frames.
    ROLE_DIRECTORY_PANE 72 A directory pane. A pane that allows the user to navigate through and select the contents of a directory. May be used by a file chooser. Also refer to ROLE_FILE_CHOOSER.
    ROLE_FILE_CHOOSER 73 A file chooser. A specialized dialog that displays the files in the directory and lets the user select a file, browse a different directory, or specify a filename. May use the directory pane to show the contents of a directory. Also refer to ROLE_DIRECTORY_PANE.
    ROLE_FONT_CHOOSER 74 A font chooser. A font chooser is a component that lets the user pick various attributes for fonts.
    ROLE_CHROME_WINDOW 75 Frame role. A top level window with a title bar, border, menu bar, etc. It is often used as the primary window for an application.
    ROLE_GLASS_PANE 76 A glass pane. A pane that is guaranteed to be painted on top of all panes beneath it. Also refer to ROLE_ROOT_PANE.
    ROLE_HTML_CONTAINER 77 A document container for HTML, whose children represent the document content.
    ROLE_ICON 78 A small fixed size picture, typically used to decorate components.
    ROLE_LABEL 79 Presents an icon or short string in an interface.
    ROLE_LAYERED_PANE 80 A layered pane. A specialized pane that allows its children to be drawn in layers, providing a form of stacking order. This is usually the pane that holds the menu bar as well as the pane that contains most of the visual components in a window. Also refer to ROLE_GLASS_PANE and ROLE_ROOT_PANE.
    ROLE_OPTION_PANE 81 A specialized pane whose primary use is inside a dialog.
    ROLE_PASSWORD_TEXT 82 A text object uses for passwords, or other places where the text content is not shown visibly to the user.
    ROLE_POPUP_MENU 83 A temporary window that is usually used to offer the user a list of choices, and then hides when the user selects one of those choices.
    ROLE_RADIO_MENU_ITEM 84 A radio button that is a menu item.
    ROLE_ROOT_PANE 85 A root pane. A specialized pane that has a glass pane and a layered pane as its children. Also refer to ROLE_GLASS_PANE and ROLE_LAYERED_PANE.
    ROLE_SCROLL_PANE 86 A scroll pane. An object that allows a user to incrementally view a large amount of information. Its children can include scroll bars and a viewport. Also refer to ROLE_VIEW_PORT.
    ROLE_SPLIT_PANE 87 A split pane. A specialized panel that presents two other panels at the same time. Between the two panels is a divider the user can manipulate to make one panel larger and the other panel smaller.
    ROLE_TABLE_COLUMN_HEADER 88 The header for a column of a table.
    ROLE_TABLE_ROW_HEADER 89 The header for a row of a table.
    ROLE_TEAR_OFF_MENU_ITEM 90 A menu item used to tear off and reattach its menu.
    ROLE_TERMINAL 91 Represents an accessible terminal.
    ROLE_TEXT_CONTAINER 92 Collection of objects that constitute a logical text entity.
    ROLE_TOGGLE_BUTTON 93 A toggle button. A specialized push button that can be checked or unchecked, but does not provide a separate indicator for the current state.
    ROLE_TREE_TABLE 94 Representas a control that is capable of expanding and collapsing rows as well as showing multiple columns of data.
    ROLE_VIEWPORT 95 A viewport. An object usually used in a scroll pane. It represents the portion of the entire data that the user can see. As the user manipulates the scroll bars, the contents of the viewport can change. Also refer to ROLE_SCROLL_PANE.
    ROLE_HEADER 96 Header of a document page. Also refer to ROLE_FOOTER.
    ROLE_FOOTER 97 Footer of a document page. Also refer to ROLE_HEADER.
    ROLE_PARAGRAPH 98 A paragraph of text.
    ROLE_RULER 99 A ruler such as those used in word processors.
    ROLE_AUTOCOMPLETE 100 A text entry having dialog or list containing items for insertion into an entry widget, for instance a list of words for completion of a text entry. It is used for xul:textbox@autocomplete.
    ROLE_EDITBAR 101 An editable text object in a toolbar.
    ROLE_ENTRY 102 An control whose textual content may be entered or modified by the user.
    ROLE_CAPTION 103 A caption describing another object.
    ROLE_DOCUMENT_FRAME 104 A visual frame or container which contains a view of document content. Document frames may occur within another Document instance, in which case the second document may be said to be embedded in the containing instance. HTML frames are often ROLE_DOCUMENT_FRAME. Either this object, or a singleton descendant, should implement the Document interface.
    ROLE_HEADING 105 Heading.
    ROLE_PAGE 106 An object representing a page of document content. It is used in documents which are accessed by the user on a page by page basis.
    ROLE_SECTION 107 A container of document content. An example of the use of this role is to represent an html:div.
    ROLE_REDUNDANT_OBJECT 108 An object which is redundant with another object in the accessible hierarchy. ATs typically ignore objects with this role.
    ROLE_FORM 109 A container of form controls. An example of the use of this role is to represent an html:form.
    ROLE_IME 110 An object which is used to allow input of characters not found on a keyboard, such as the input of Chinese characters on a Western keyboard.
    ROLE_APP_ROOT 111  
    ROLE_PARENT_MENUITEM 112 Represents a menu item, which is an entry in a menu that a user can choose to display another menu.
    ROLE_CALENDAR 113 A calendar that allows the user to select a date.
    ROLE_COMBOBOX_LIST 114 A list of items that is shown by combobox.
    ROLE_COMBOBOX_OPTION 115 A item of list that is shown by combobox;
    ROLE_IMAGE_MAP 116 An image map -- has child links representing the areas.
    ROLE_OPTION 117 An option in a listbox.
    ROLE_RICH_OPTION 118 A rich option in a listbox, it can have other widgets as children.
    ROLE_LISTBOX 119 A list of options.
    ROLE_FLAT_EQUATION 120 Represents a mathematical equation in the accessible name.
    ROLE_GRID_CELL 121 Represents a cell within a grid. It is used for role="gridcell". Unlike ROLE_CELL, it allows the calculation of the accessible name from subtree. Also, see ROLE_TABLE.
    ROLE_EMBEDDED_OBJECT 122 Represents an embedded object. It is used for html:object or html:embed.

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