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Diffstat (limited to 'examples/widgets/doc/src/deform.qdoc')
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diff --git a/examples/widgets/doc/src/deform.qdoc b/examples/widgets/doc/src/deform.qdoc new file mode 100644 index 0000000000..8195f90ffa --- /dev/null +++ b/examples/widgets/doc/src/deform.qdoc @@ -0,0 +1,51 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** GNU Free Documentation License +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms +** and conditions contained in a signed written agreement between you +** and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \example painting/deform + \title Vector Deformation + + This example shows how to use advanced vector techniques to draw text + using a \c QPainterPath. + + \image deform-demo.png + + We define a vector deformation field in the shape of a lens and apply + this to all points in a path. This means that what is rendered on + screen is not pixel manipulation, but modified vector representations of + the glyphs themselves. This is visible from the high quality of the + antialiased edges for the deformed glyphs. + + To get a fairly complex path we allow the user to type in text and + convert the text to paths. This is done using the + QPainterPath::addText() function. + + The lens is drawn using a single call to QPainter::drawEllipse(), + using a QRadialGradient to fill it with a specialized color + table, giving the effect of the sun's reflection and a drop + shadow. The lens is cached as a pixmap for better performance. +*/ |