Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtOpenGL module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "starwidget.h"
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StarWidget::StarWidget(QWidget *parent)
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: QWidget(parent)
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, path(VG_INVALID_HANDLE)
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, pen(Qt::red, 4.0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin)
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, brush(Qt::yellow)
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{
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setMinimumSize(220, 250);
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setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
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}
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static VGubyte const starSegments[] = {
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VG_MOVE_TO_ABS,
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VG_LINE_TO_REL,
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VG_LINE_TO_REL,
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VG_LINE_TO_REL,
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VG_LINE_TO_REL,
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VG_CLOSE_PATH
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};
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static VGfloat const starCoords[] = {
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110, 35,
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50, 160,
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-130, -100,
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160, 0,
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-130, 100
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};
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void StarWidget::paintEvent(QPaintEvent *)
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{
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QPainter painter;
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painter.begin(this);
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// Make sure that we are using the OpenVG paint engine.
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if (painter.paintEngine()->type() != QPaintEngine::OpenVG) {
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#ifdef Q_WS_QWS
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qWarning("Not using OpenVG: use the '-display' option to specify an OpenVG driver");
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#else
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qWarning("Not using OpenVG: specify '-graphicssystem OpenVG'");
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#endif
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return;
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}
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// Select a pen and a brush for drawing the star.
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painter.setPen(pen);
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painter.setBrush(brush);
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// We want the star border to be anti-aliased.
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painter.setRenderHints(QPainter::Antialiasing);
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// Flush the state changes to the OpenVG implementation
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// and prepare to perform raw OpenVG calls.
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painter.beginNativePainting();
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// Cache the path if we haven't already or if the path has
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// become invalid because the window's context has changed.
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if (path == VG_INVALID_HANDLE || !vgGetPathCapabilities(path)) {
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path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
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VG_PATH_DATATYPE_F,
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1.0f, // scale
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0.0f, // bias
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6, // segmentCapacityHint
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10, // coordCapacityHint
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VG_PATH_CAPABILITY_ALL);
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vgAppendPathData(path, sizeof(starSegments), starSegments, starCoords);
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}
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// Draw the star directly using the OpenVG API.
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vgDrawPath(path, VG_FILL_PATH | VG_STROKE_PATH);
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// Restore normal QPainter operations.
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painter.endNativePainting();
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painter.end();
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}
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