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234 lines
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/tqaccessible.cpp:421 -->
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<title>TQAccessibleInterface Class</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQAccessibleInterface Class Reference</h1>
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<p>The TQAccessibleInterface class defines an interface that exposes information about accessible objects.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="tqaccessible-h.html">tqaccessible.h</a>></tt>
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<p>Inherits <a href="tqaccessible.html">TQAccessible</a>.
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<p>Inherited by <a href="tqaccessibleobject.html">TQAccessibleObject</a>.
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<p><a href="tqaccessibleinterface-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn>virtual bool <a href="#isValid"><b>isValid</b></a> () const = 0</li>
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<li class=fn>virtual int <a href="#childCount"><b>childCount</b></a> () const = 0</li>
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<li class=fn>virtual TQRESULT <a href="#queryChild"><b>queryChild</b></a> ( int control, TQAccessibleInterface ** iface ) const = 0</li>
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<li class=fn>virtual TQRESULT <a href="#queryParent"><b>queryParent</b></a> ( TQAccessibleInterface ** iface ) const = 0</li>
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<li class=fn>virtual int <a href="#controlAt"><b>controlAt</b></a> ( int x, int y ) const = 0</li>
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<li class=fn>virtual TQRect <a href="#rect"><b>rect</b></a> ( int control ) const = 0</li>
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<li class=fn>virtual int <a href="#navigate"><b>navigate</b></a> ( NavDirection direction, int startControl ) const = 0</li>
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<li class=fn>virtual TQString <a href="#text"><b>text</b></a> ( Text t, int control ) const = 0</li>
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<li class=fn>virtual void <a href="#setText"><b>setText</b></a> ( Text t, int control, const TQString & text ) = 0</li>
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<li class=fn>virtual Role <a href="#role"><b>role</b></a> ( int control ) const = 0</li>
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<li class=fn>virtual State <a href="#state"><b>state</b></a> ( int control ) const = 0</li>
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<li class=fn>virtual TQMemArray<int> <a href="#selection"><b>selection</b></a> () const = 0</li>
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<li class=fn>virtual bool <a href="#doDefaultAction"><b>doDefaultAction</b></a> ( int control ) = 0</li>
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<li class=fn>virtual bool <a href="#setFocus"><b>setFocus</b></a> ( int control ) = 0</li>
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<li class=fn>virtual bool <a href="#setSelected"><b>setSelected</b></a> ( int control, bool on, bool extend ) = 0</li>
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<li class=fn>virtual void <a href="#clearSelection"><b>clearSelection</b></a> () = 0</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQAccessibleInterface class defines an interface that exposes information about accessible objects.
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<p>
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<p>See also <a href="misc.html">Miscellaneous Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn>int <a name="childCount"></a>TQAccessibleInterface::childCount () const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the number of children that belong to this object. A child
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can provide accessibility information on it's own (e.g. a child
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widget), or be a sub-element of this accessible object.
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<p> All objects provide this information.
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<p> <p>See also <a href="#queryChild">queryChild</a>().
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<h3 class=fn>void <a name="clearSelection"></a>TQAccessibleInterface::clearSelection ()<tt> [pure virtual]</tt>
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</h3>
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<p> Removes any selection from the object.
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<p> <p>See also <a href="#setSelected">setSelected</a>().
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<h3 class=fn>int <a name="controlAt"></a>TQAccessibleInterface::controlAt ( int x, int y ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the ID of the child that contains the screen coordinates
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(<em>x</em>, <em>y</em>). This function returns 0 if the point is positioned
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on the object itself. If the tested point is outside the
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boundaries of the object this function returns -1.
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<p> All visual objects provide this information.
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<h3 class=fn>bool <a name="doDefaultAction"></a>TQAccessibleInterface::doDefaultAction ( int control )<tt> [pure virtual]</tt>
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</h3>
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<p> Calling this function performs the default action of the child
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object specified by <em>control</em>, or the default action of the
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object itself if <em>control</em> is 0.
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<h3 class=fn>bool <a name="isValid"></a>TQAccessibleInterface::isValid () const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns TRUE if all the data necessary to use this interface
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implementation is valid (e.g. all pointers are non-null),
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otherwise returns FALSE.
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<h3 class=fn>int <a name="navigate"></a>TQAccessibleInterface::navigate ( <a href="tqaccessible.html#NavDirection-enum">NavDirection</a> direction, int startControl ) const<tt> [pure virtual]</tt>
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</h3>
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<p> This function traverses to another object, or to a sub-element of
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the current object. <em>direction</em> specifies in which direction to
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navigate, and <em>startControl</em> specifies the start point of the
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navigation, which is either 0 if the navigation starts at the
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object itself, or an ID of one of the object's sub-elements.
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<p> The function returns the ID of the sub-element located in the <em>direction</em> specified. If there is nothing in the navigated <em>direction</em>, this function returns -1.
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<p> All objects support navigation.
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<h3 class=fn>TQRESULT <a name="queryChild"></a>TQAccessibleInterface::queryChild ( int control, <a href="tqaccessibleinterface.html">TQAccessibleInterface</a> ** iface ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Sets <em>iface</em> to point to the implementation of the
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TQAccessibleInterface for the child specified with <em>control</em>. If
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the child doesn't provide accessibility information on it's own,
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the value of <em>iface</em> is set to 0. For those elements, this
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object is responsible for exposing the child's properties.
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<p> All objects provide this information.
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<p> <p>See also <a href="#childCount">childCount</a>() and <a href="#queryParent">queryParent</a>().
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<h3 class=fn>TQRESULT <a name="queryParent"></a>TQAccessibleInterface::queryParent ( <a href="tqaccessibleinterface.html">TQAccessibleInterface</a> ** iface ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Sets <em>iface</em> to point to the implementation of the
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TQAccessibleInterface for the parent object, or to 0 if there is
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no such implementation or object.
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<p> All objects provide this information.
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<p> <p>See also <a href="#queryChild">queryChild</a>().
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<h3 class=fn><a href="tqrect.html">TQRect</a> <a name="rect"></a>TQAccessibleInterface::rect ( int control ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the location of the child specified with <em>control</em> in
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screen coordinates. This function returns the location of the
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object itself if <em>control</em> is 0.
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<p> All visual objects provide this information.
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<h3 class=fn><a href="tqaccessible.html#Role-enum">Role</a> <a name="role"></a>TQAccessibleInterface::role ( int control ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the role of the object if <em>control</em> is 0, or the role of
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the object's sub-element with ID <em>control</em>. The role of an object
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is usually static. All accessible objects have a role.
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<p> <p>See also <a href="#text">text</a>(), <a href="#state">state</a>(), and <a href="#selection">selection</a>().
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<h3 class=fn><a href="tqmemarray.html">TQMemArray</a><int> <a name="selection"></a>TQAccessibleInterface::selection () const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the list of all the element IDs that are selected.
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<p> <p>See also <a href="#text">text</a>(), <a href="#role">role</a>(), and <a href="#state">state</a>().
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<h3 class=fn>bool <a name="setFocus"></a>TQAccessibleInterface::setFocus ( int control )<tt> [pure virtual]</tt>
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</h3>
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<p> Gives the focus to the child object specified by <em>control</em>, or to
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the object itself if <em>control</em> is 0.
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<p> Returns TRUE if the focus could be set; otherwise returns FALSE.
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<h3 class=fn>bool <a name="setSelected"></a>TQAccessibleInterface::setSelected ( int control, bool on, bool extend )<tt> [pure virtual]</tt>
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</h3>
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<p> Sets the selection of the child object with ID <em>control</em> to <em>on</em>. If <em>extend</em> is TRUE, all child elements between the focused
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item and the specified child object have their selection set to <em>on</em>.
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<p> Returns TRUE if the selection could be set; otherwise returns
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FALSE.
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<p> <p>See also <a href="#setFocus">setFocus</a>() and <a href="#clearSelection">clearSelection</a>().
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<h3 class=fn>void <a name="setText"></a>TQAccessibleInterface::setText ( <a href="tqaccessible.html#Text-enum">Text</a> t, int control, const <a href="tqstring.html">TQString</a> & text )<tt> [pure virtual]</tt>
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</h3>
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<p> Sets the text property <em>t</em> of the child object <em>control</em> to <em>text</em>. If <em>control</em> is 0, the text property of the object itself
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is set.
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<h3 class=fn><a href="tqaccessible.html#State-enum">State</a> <a name="state"></a>TQAccessibleInterface::state ( int control ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns the current state of the object if <em>control</em> is 0, or the
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state of the object's sub-element element with ID <em>control</em>. All
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objects have a state.
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<p> <p>See also <a href="#text">text</a>(), <a href="#role">role</a>(), and <a href="#selection">selection</a>().
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<h3 class=fn><a href="tqstring.html">TQString</a> <a name="text"></a>TQAccessibleInterface::text ( <a href="tqaccessible.html#Text-enum">Text</a> t, int control ) const<tt> [pure virtual]</tt>
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</h3>
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<p> Returns a string property <em>t</em> of the child object specified by <em>control</em>, or the string property of the object itself if <em>control</em>
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is 0.
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<p> The <em>Name</em> is a string used by clients to identify, find or
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announce an accessible object for the user. All objects must have
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a name that is unique within their container.
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<p> An accessible object's <em>Description</em> provides textual information
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about an object's visual appearance. The description is primarily
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used to provide greater context for low-vision or blind users, but
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is also used for context searching or other applications. Not all
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objects have a description. An "OK" button would not need a
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description, but a toolbutton that shows a picture of a smiley
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would.
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<p> The <em>Value</em> of an accessible object represents visual information
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contained by the object, e.g. the text in a line edit. Usually,
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the value can be modified by the user. Not all objects have a
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value, e.g. static text labels don't, and some objects have a
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state that already is the value, e.g. toggle buttons.
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<p> The <em>Help</em> text provides information about the function and
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usage of an accessible object. Not all objects provide this
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information.
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<p> An accessible object's <em>DefaultAction</em> describes the object's
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primary method of manipulation, and should be a verb or a short
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phrase, e.g. "Press" for a button.
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<p> The accelerator is a keyboard shortcut that activates the default
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action of the object. A keyboard shortcut is the underlined
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character in the text of a menu, menu item or control, and is
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either the character itself, or a combination of this character
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and a modifier key like ALT, CTRL or SHIFT. Command controls like
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tool buttons also have shortcut keys and usually display them in
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their tooltip.
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<p> <p>See also <a href="#role">role</a>(), <a href="#state">state</a>(), and <a href="#selection">selection</a>().
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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