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  1. <?xml version="1.0" encoding="iso-8859-1"?>
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  2. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
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  3. <html><head><title>QLinearGradient Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
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  9. </style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">&#160;&#160;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a>&#160;&#183; <a href="classes.html"><font color="#004faf">All Classes</font></a>&#160;&#183; <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QLinearGradient Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QLinearGradient class is used in combination with <a href="qbrush.html">QBrush</a> to specify a linear gradient brush.
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  10. <a href="#details">More...</a></p>
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  11. 

  12. <p>Inherits <a href="qgradient.html">QGradient</a>.</p><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qlineargradient.html#QLinearGradient">__init__</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#QLinearGradient-2">__init__</a></b> (<i>self</i>, QPointF&#160;<i>start</i>, QPointF&#160;<i>finalStop</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#QLinearGradient-3">__init__</a></b> (<i>self</i>, float&#160;<i>xStart</i>, float&#160;<i>yStart</i>, float&#160;<i>xFinalStop</i>, float&#160;<i>yFinalStop</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#QLinearGradient-4">__init__</a></b> (<i>self</i>, QLinearGradient)</li><li><div class="fn" />QPointF <b><a href="qlineargradient.html#finalStop">finalStop</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#setFinalStop">setFinalStop</a></b> (<i>self</i>, QPointF&#160;<i>stop</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#setFinalStop-2">setFinalStop</a></b> (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#setStart">setStart</a></b> (<i>self</i>, QPointF&#160;<i>start</i>)</li><li><div class="fn" /><b><a href="qlineargradient.html#setStart-2">setStart</a></b> (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</li><li><div class="fn" />QPointF <b><a href="qlineargradient.html#start">start</a></b> (<i>self</i>)</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QLinearGradient class is used in combination with <a href="qbrush.html">QBrush</a> to specify a linear gradient brush.</p>
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  13. <p>Linear gradients interpolate colors between start and end
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  14. points. Outside these points the gradient is either padded,
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  15. reflected or repeated depending on the currently set <a href="qgradient.html#Spread-enum">spread</a> method:</p>
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  16. <table class="generic">
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  17. <tr class="odd" valign="top">
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  18. <td><img alt="" src="images/qlineargradient-pad.png" /></td>
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  19. <td><img alt="" src="images/qlineargradient-reflect.png" /></td>
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  20. <td><img alt="" src="images/qlineargradient-repeat.png" /></td>
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  21. </tr>
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  22. <tr class="even" valign="top">
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  23. <td><a href="qgradient.html#Spread-enum">PadSpread</a>
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  24. (default)</td>
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  25. <td><a href="qgradient.html#Spread-enum">ReflectSpread</a></td>
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  26. <td><a href="qgradient.html#Spread-enum">RepeatSpread</a></td>
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  27. </tr>
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  28. </table>
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  29. <p>The colors in a gradient is defined using stop points of the
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  30. <a href="qgradient.html#QGradientStop-typedef">QGradientStop</a>
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  31. type, i.e. a position and a color. Use the <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() or the
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  32. <a href="qgradient.html#setStops">QGradient.setStops</a>()
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  33. function to define the stop points. It is the gradient's complete
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  34. set of stop points that describes how the gradient area should be
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  35. filled. If no stop points have been specified, a gradient of black
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  36. at 0 to white at 1 is used.</p>
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  37. <p>In addition to the functions inherited from <a href="qgradient.html">QGradient</a>, the QLinearGradient class provides
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  38. the <a href="qlineargradient.html#finalStop">finalStop</a>()
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  39. function which returns the final stop point of the gradient, and
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  40. the <a href="qlineargradient.html#start">start</a>() function
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  41. returning the start point of the gradient.</p>
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  42. <hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QLinearGradient" />QLinearGradient.__init__ (<i>self</i>)</h3><p>Constructs a default linear gradient with interpolation area
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  43. between (0, 0) and (1, 1).</p>
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  44. <p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>(), <a href="qlineargradient.html#setStart">setStart</a>(), and <a href="qlineargradient.html#setFinalStop">setFinalStop</a>().</p>
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  47. <h3 class="fn"><a name="QLinearGradient-2" />QLinearGradient.__init__ (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>start</i>, <a href="qpointf.html">QPointF</a>&#160;<i>finalStop</i>)</h3><p>Constructs a linear gradient with interpolation area between the
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  48. given <i>start</i> point and <i>finalStop</i>.</p>
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  49. <p><b>Note:</b> The expected parameter values are in pixels.</p>
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  50. <p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() and
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  51. <a href="qgradient.html#setStops">QGradient.setStops</a>().</p>
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  52. 

  53. 

  54. <h3 class="fn"><a name="QLinearGradient-3" />QLinearGradient.__init__ (<i>self</i>, float&#160;<i>xStart</i>, float&#160;<i>yStart</i>, float&#160;<i>xFinalStop</i>, float&#160;<i>yFinalStop</i>)</h3><p>Constructs a linear gradient with interpolation area between
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  55. (<i>x1</i>, <i>y1</i>) and (<i>x2</i>, <i>y2</i>).</p>
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  56. <p><b>Note:</b> The expected parameter values are in pixels.</p>
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  57. <p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() and
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  58. <a href="qgradient.html#setStops">QGradient.setStops</a>().</p>
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  59. 

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  61. <h3 class="fn"><a name="QLinearGradient-4" />QLinearGradient.__init__ (<i>self</i>, <a href="qlineargradient.html">QLinearGradient</a>)</h3><h3 class="fn"><a name="finalStop" /><a href="qpointf.html">QPointF</a> QLinearGradient.finalStop (<i>self</i>)</h3><p>Returns the final stop point of this linear gradient in logical
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  62. coordinates.</p>
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  63. <p><b>See also</b> <a href="qlineargradient.html#setFinalStop">setFinalStop</a>() and <a href="qgradient.html#stops">QGradient.stops</a>().</p>
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  64. 

  65. 

  66. <h3 class="fn"><a name="setFinalStop" />QLinearGradient.setFinalStop (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>stop</i>)</h3><p>Sets the final stop point of this linear gradient in logical
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  67. coordinates to <i>stop</i>.</p>
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  68. <p>This function was introduced in Qt 4.2.</p>
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  69. <p><b>See also</b> <a href="qlineargradient.html#finalStop">finalStop</a>().</p>
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  70. 

  71. 

  72. <h3 class="fn"><a name="setFinalStop-2" />QLinearGradient.setFinalStop (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</h3><p>This is an overloaded function.</p>
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  73. <p>Sets the final stop point of this linear gradient in logical
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  74. coordinates to <i>x</i>, <i>y</i>.</p>
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  75. <p>This function was introduced in Qt 4.2.</p>
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  76. <p><b>See also</b> <a href="qlineargradient.html#start">start</a>().</p>
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  77. 

  78. 

  79. <h3 class="fn"><a name="setStart" />QLinearGradient.setStart (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>start</i>)</h3><p>Sets the start point of this linear gradient in logical
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  80. coordinates to <i>start</i>.</p>
    81. 

  81. <p>This function was introduced in Qt 4.2.</p>
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  82. <p><b>See also</b> <a href="qlineargradient.html#start">start</a>().</p>
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  83. 

  84. 

  85. <h3 class="fn"><a name="setStart-2" />QLinearGradient.setStart (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</h3><p>This is an overloaded function.</p>
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  86. <p>Sets the start point of this linear gradient in logical
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  87. coordinates to <i>x</i>, <i>y</i>.</p>
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  88. <p>This function was introduced in Qt 4.2.</p>
    89. 

  89. <p><b>See also</b> <a href="qlineargradient.html#start">start</a>().</p>
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  90. 

  91. 

  92. <h3 class="fn"><a name="start" /><a href="qpointf.html">QPointF</a> QLinearGradient.start (<i>self</i>)</h3><p>Returns the start point of this linear gradient in logical
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  93. coordinates.</p>
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  94. <p><b>See also</b> <a href="qlineargradient.html#setStart">setStart</a>() and <a href="qgradient.html#stops">QGradient.stops</a>().</p>
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  95. <address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt&#160;4.9.4 for X11</td><td align="center" width="50%">Copyright &#169; <a href="http://www.riverbankcomputing.com">Riverbank&#160;Computing&#160;Ltd</a> and <a href="http://www.qtsoftware.com">Nokia</a> 2012</td><td align="right" width="25%">Qt&#160;4.8.2</td></tr></table></div></address></body></html>
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