Редактирование: Qt:Документация 4.3.2/qlineargradient

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=QLinearGradient Class Reference<br /><sup><sup>[модуль [[Qt:Документация 4.3.2/qtgui | QtGui]] ] </sup></sup>=

The QLinearGradient class is used in combination with [[Qt:Документация 4.3.2/qbrush | QBrush]] to specify a linear gradient brush. [[#details | Далее...]]
<source lang="cpp-qt"> #include <QLinearGradient></source> 
Inherits [[Qt:Документация 4.3.2/qgradient | QGradient]].

*[[Qt:Документация 4.3.2/qlineargr	adient-members | Список всех членов, включая унаследованные]]
<div id="public-functions"></div>
===Открытые функции===

*'''[[Qt:Документация 4.3.2/qlineargradient#QLinearGradient | QLinearGradient]]''' ()
*'''[[Qt:Документация 4.3.2/qlineargradient#QLinearGradient-2 | QLinearGradient]]''' ( const QPointF &amp; ''start'', const QPointF &amp; ''finalStop'' )
*'''[[Qt:Документация 4.3.2/qlineargradient#QLinearGradient-3 | QLinearGradient]]''' ( qreal ''x1'', qreal ''y1'', qreal ''x2'', qreal ''y2'' )
*QPointF '''[[Qt:Документация 4.3.2/qlineargradient#finalStop | finalStop]]''' () const
*void '''[[Qt:Документация 4.3.2/qlineargradient#setFinalStop | setFinalStop]]''' ( const QPointF &amp; ''stop'' )
*void '''[[Qt:Документация 4.3.2/qlineargradient#setFinalStop-2 | setFinalStop]]''' ( qreal ''x'', qreal ''y'' )
*void '''[[Qt:Документация 4.3.2/qlineargradient#setStart | setStart]]''' ( const QPointF &amp; ''start'' )
*void '''[[Qt:Документация 4.3.2/qlineargradient#setStart-2 | setStart]]''' ( qreal ''x'', qreal ''y'' )
*QPointF '''[[Qt:Документация 4.3.2/qlineargradient#start | start]]''' () const

*8 public functions inherited from [[Qt:Документация 4.3.2/qgradient#public-functions | QGradient]]
<div id="details"></div><hr />
==Подробное описание==

The QLinearGradient class is used in combination with [[Qt:Документация 4.3.2/qbrush | QBrush]] to specify a linear gradient brush.

Linear gradients interpolate colors between start and end points. Outside these points the gradient is either padded, reflected or repeated depending on the currently set [[Qt:Документация 4.3.2/qgradient#Spread-enum | spread]] method:


{| align="center" cellpadding="2" cellspacing="1" border="0"

|- valign="top" class="odd" | 
|[[Image:qlineargradient-pad.png|center]]
|[[Image:qlineargradient-reflect.png|center]]
|[[Image:qlineargradient-repeat.png|center]]
|- valign="top" class="even" | 
|[[Qt:Документация 4.3.2/qgradient#Spread-enum | PadSpread]] (default)
|[[Qt:Документация 4.3.2/qgradient#Spread-enum | ReflectSpread]]
|[[Qt:Документация 4.3.2/qgradient#Spread-enum | RepeatSpread]]
|}

The colors in a gradient is defined using stop points of the [[Qt:Документация 4.3.2/qgradient#QGradientStop-typedef | QGradientStop]] type, i.e. a position and a color. Use the [[Qt:Документация 4.3.2/qgradient#setColorAt | QGradient::setColorAt]]() or the [[Qt:Документация 4.3.2/qgradient#setStops | QGradient::setStops]]() function to define the stop points. It is the gradient's complete set of stop points that describes how the gradient area should be filled. If no stop points have been specified, a gradient of black at 0 to white at 1 is used.

In addition to the functions inherited from [[Qt:Документация 4.3.2/qgradient | QGradient]], the QLinearGradient class provides the [[Qt:Документация 4.3.2/qlineargradient#finalStop | finalStop]]() function which returns the final stop point of the gradient, and the [[Qt:Документация 4.3.2/qlineargradient#start | start]]() function returning the start point of the gradient.

See also [[Qt:Документация 4.3.2/qradialgradient | QRadialGradient]], [[Qt:Документация 4.3.2/qconicalgradient | QConicalGradient]], and [[Qt:Документация 4.3.2/demos-gradients | The Gradients Demo]].
<hr />
==Описание функций-членов==

===<div id="QLinearGradient"></div>QLinearGradient::QLinearGradient ()===

Constructs a default linear gradient with interpolation area between (0, 0) and (1, 1).

See also [[Qt:Документация 4.3.2/qgradient#setColorAt | QGradient::setColorAt]](), [[Qt:Документация 4.3.2/qlineargradient#setStart | setStart]](), and [[Qt:Документация 4.3.2/qlineargradient#setFinalStop | setFinalStop]]().

===<div id="QLinearGradient-2"></div>QLinearGradient::QLinearGradient ( const [[Qt:Документация 4.3.2/qpointf | QPointF]] &amp; ''start'', const [[Qt:Документация 4.3.2/qpointf | QPointF]] &amp; ''finalStop'' )===

Constructs a linear gradient with interpolation area between the given ''start'' point and ''finalStop''.

See also [[Qt:Документация 4.3.2/qgradient#setColorAt | QGradient::setColorAt]]() and [[Qt:Документация 4.3.2/qgradient#setStops | QGradient::setStops]]().

===<div id="QLinearGradient-3"></div>QLinearGradient::QLinearGradient ( [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''x1'', [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''y1'', [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''x2'', [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''y2'' )===

Constructs a linear gradient with interpolation area between (''x1'', ''y1'') and (''x2'', ''y2'').

See also [[Qt:Документация 4.3.2/qgradient#setColorAt | QGradient::setColorAt]]() and [[Qt:Документация 4.3.2/qgradient#setStops | QGradient::setStops]]().

===<div id="finalStop"></div>[[Qt:Документация 4.3.2/qpointf | QPointF]] QLinearGradient::finalStop () const===

Returns the final stop point of this linear gradient in logical coordinates.

See also [[Qt:Документация 4.3.2/qlineargradient#setFinalStop | setFinalStop]]() and [[Qt:Документация 4.3.2/qgradient#stops | QGradient::stops]]().

===<div id="setFinalStop"></div>void QLinearGradient::setFinalStop ( const [[Qt:Документация 4.3.2/qpointf | QPointF]] &amp; ''stop'' )===

Sets the final stop point of this linear gradient in logical coordinates to ''stop''.

Эта функция была введена в Qt 4.2.

See also [[Qt:Документация 4.3.2/qlineargradient#finalStop | finalStop]]().

===<div id="setFinalStop-2"></div>void QLinearGradient::setFinalStop ( [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''x'', [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''y'' )===

Эта перегруженная функция предоставлена для удобства.

Sets the final stop point of this linear gradient in logical coordinates to ''x'', ''y''.

Эта функция была введена в Qt 4.2.

Смотрите также [[Qt:Документация 4.3.2/qlineargradient#start | start]]().

===<div id="setStart"></div>void QLinearGradient::setStart ( const [[Qt:Документация 4.3.2/qpointf | QPointF]] &amp; ''start'' )===

Sets the start point of this linear gradient in logical coordinates to ''start''.

Эта функция была введена в Qt 4.2.

Смотрите также [[Qt:Документация 4.3.2/qlineargradient#start | start]]().

===<div id="setStart-2"></div>void QLinearGradient::setStart ( [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''x'', [[Qt:Документация 4.3.2/qtglobal#qreal-typedef | qreal]] ''y'' )===

Эта перегруженная функция предоставлена для удобства.

Sets the start point of this linear gradient in logical coordinates to ''x'', ''y''.

Эта функция была введена в Qt 4.2.

Смотрите также [[Qt:Документация 4.3.2/qlineargradient#start | start]]().

===<div id="start"></div>[[Qt:Документация 4.3.2/qpointf | QPointF]] QLinearGradient::start () const===

Returns the start point of this linear gradient in logical coordinates.

See also [[Qt:Документация 4.3.2/qlineargradient#setStart | setStart]]() and [[Qt:Документация 4.3.2/qgradient#stops | QGradient::stops]]().


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