From 97b5b8009254004608feefb903cbf44abaa099f6 Mon Sep 17 00:00:00 2001 From: Casper van Donderen Date: Mon, 7 May 2012 18:49:48 +0200 Subject: Doc: Modularize QtWidgets documentation. This change moves the snippets and images to the modularized directories. Change-Id: Idec1afb9db7ea6add1ca4cf25ec4019d8bce0c4d Reviewed-by: Marius Storm-Olsen --- .../code/src_gui_effects_qgraphicseffect.cpp | 83 ++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 src/widgets/doc/snippets/code/src_gui_effects_qgraphicseffect.cpp (limited to 'src/widgets/doc/snippets/code/src_gui_effects_qgraphicseffect.cpp') diff --git a/src/widgets/doc/snippets/code/src_gui_effects_qgraphicseffect.cpp b/src/widgets/doc/snippets/code/src_gui_effects_qgraphicseffect.cpp new file mode 100644 index 0000000000..3e0b0b64ee --- /dev/null +++ b/src/widgets/doc/snippets/code/src_gui_effects_qgraphicseffect.cpp @@ -0,0 +1,83 @@ +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [0] +MyGraphicsOpacityEffect::draw(QPainter *painter) +{ + // Fully opaque; draw directly without going through a pixmap. + if (qFuzzyCompare(m_opacity, 1)) { + drawSource(painter); + return; + } + ... +} +//! [0] + +//! [1] +MyGraphicsEffect::draw(QPainter *painter) +{ + ... + QPoint offset; + if (sourceIsPixmap()) { + // No point in drawing in device coordinates (pixmap will be scaled anyways). + const QPixmap pixmap = sourcePixmap(Qt::LogicalCoordinates, &offset); + ... + painter->drawPixmap(offset, pixmap); + } else { + // Draw pixmap in device coordinates to avoid pixmap scaling; + const QPixmap pixmap = sourcePixmap(Qt::DeviceCoordinates, &offset); + painter->setWorldTransform(QTransform()); + ... + painter->drawPixmap(offset, pixmap); + } + ... +} +//! [1] + +//! [2] +... +QLinearGradient alphaGradient(rect.topLeft(), rect.bottomLeft()); +alphaGradient.setColorAt(0.0, Qt::transparent); +alphaGradient.setColorAt(0.5, Qt::black); +alphaGradient.setColorAt(1.0, Qt::transparent); +QGraphicsOpacityEffect *effect = new QGraphicsOpacityEffect; +effect->setOpacityMask(alphaGradient); +... +//! [2] -- cgit v1.2.3