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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtDataVis3D module.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "utils_p.h"
#include <QVector3D>
#include <QColor>
#include <QPainter>
#include <QPoint>
#include <QImage>
#include <qmath.h>
#include <QDebug>
QTCOMMERCIALDATAVIS3D_BEGIN_NAMESPACE
QVector3D Utils::vectorFromColor(const QColor &color)
{
return QVector3D(color.redF(), color.greenF(), color.blueF());
}
void Utils::printText(QPainter *painter, const QString &text, const QSize &position,
bool absoluteCoords, qreal rotation, qreal scale)
{
painter->save();
painter->setCompositionMode(QPainter::CompositionMode_Source);
painter->setPen(Qt::black); // TODO: Use black, as nothing works
QFont bgrFont = QFont(QStringLiteral("Arial"), 17);
QFont valueFont = QFont(QStringLiteral("Arial"), 11);
valueFont.setBold(true);
painter->setFont(bgrFont);
QFontMetrics valueFM(valueFont);
QFontMetrics bgrFM(bgrFont);
int valueStrLen = valueFM.width(text);
int bgrStrLen = 0;
int bgrHeight = valueFM.height() + 8;
QString bgrStr = QString();
do {
bgrStr.append(QStringLiteral("I"));
bgrStrLen = bgrFM.width(bgrStr);
} while (bgrStrLen <= (valueStrLen + 8));
#if 0
// Hack solution, as drawRect doesn't work
painter->drawText(position.width() - (bgrStrLen / 2),
position.height() - bgrHeight,
bgrStrLen, bgrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
bgrStr);
//painter->setPen(d_ptr->m_textColor);
painter->setPen(Qt::lightGray); // TODO: Use lightGray, as nothing works
painter->setFont(valueFont);
painter->drawText(position.width() - (valueStrLen / 2),
position.height() - bgrHeight,
valueStrLen, bgrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
text);
#else
//qDebug() << painter->window() << painter->viewport();
painter->scale(scale, scale);
if (absoluteCoords) {
// This assumes absolute screen coordinates
painter->translate(position.width() - (((float)bgrStrLen / 2.0f)
* cos(rotation * m_pi / 180.0f))
+ (((float)bgrHeight / 2.0f) * sin(rotation * m_pi / 180.0f)),
position.height()
- ((((float)bgrHeight / 2.0f) * cos(rotation * m_pi / 180.0f))
+ (((float)bgrStrLen / 2.0f) * sin(rotation * m_pi / 180.0f))));
} else {
// This calculates y as a distance from screen bottom
painter->translate(position.width() - (((float)bgrStrLen / 2.0f)
* cos(rotation * m_pi / 180.0f))
+ (((float)bgrHeight / 2.0f) * sin(rotation * m_pi / 180.0f)),
painter->window().height() - position.height()
- ((((float)bgrHeight / 2.0f) * cos(rotation * m_pi / 180.0f))
+ (((float)bgrStrLen / 2.0f) * sin(rotation * m_pi / 180.0f))));
}
//qDebug() << painter->window().height() - position.height()
// - ((((float)bgrHeight / 2.0f) * cos(rotation * m_pi / 180.0f))
// + (((float)bgrStrLen / 2.0f) * sin(rotation * m_pi / 180.0f)));
painter->rotate(rotation);
painter->drawText(0, 0,
bgrStrLen, bgrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
bgrStr);
painter->setPen(Qt::lightGray); // TODO: Use lightGray, as nothing works
painter->setFont(valueFont);
painter->drawText(6, 0,
valueStrLen, bgrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
text);
painter->resetTransform();
#endif
painter->restore();
}
QImage Utils::printTextToImage(const QFont &font, const QString &text, const QColor &bgrColor,
const QColor &txtColor, LabelTransparency transparency)
{
// Calculate text dimensions
QFont valueFont = font;
valueFont.setPointSize(30);
QFontMetrics valueFM(valueFont);
int valueStrWidth = valueFM.width(text);
int valueStrHeight = valueFM.height();
QSize labelSize;
if (TransparencyNoBackground == transparency)
labelSize = QSize(valueStrWidth, valueStrHeight);
else
labelSize = QSize(valueStrWidth + 30, valueStrHeight + 30);
// Create image
QImage image = QImage(labelSize, QImage::Format_ARGB32);
image.fill(Qt::transparent);
// Init painter
QPainter painter(&image);
// Paint text
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setCompositionMode(QPainter::CompositionMode_Source);
switch (transparency) {
case TransparencyNoBackground: {
painter.setFont(valueFont);
painter.setPen(txtColor);
painter.drawText(0, 0,
valueStrWidth, valueStrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
text);
break;
}
case TransparencyFromTheme: {
painter.setBrush(QBrush(bgrColor));
painter.setPen(bgrColor);
painter.drawRoundedRect(0, 0, labelSize.width(), labelSize.height(), 10.0, 10.0f);
painter.setFont(valueFont);
painter.setPen(txtColor);
painter.drawText(15, 15,
valueStrWidth, valueStrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
text);
break;
}
case TransparencyNone: {
painter.setBrush(QBrush(bgrColor));
painter.setPen(bgrColor);
painter.drawRect(0, 0, labelSize.width(), labelSize.height());
painter.setFont(valueFont);
painter.setPen(txtColor);
painter.drawText(15, 15,
valueStrWidth, valueStrHeight,
Qt::AlignCenter | Qt::AlignVCenter,
text);
break;
}
}
return image;
}
QVector3D Utils::getSelection(QPoint mousepos, int height)
{
QVector3D selectedColor;
// This is the only one that works with ANGLE (ES 2.0)
// Item count will be limited to 256*256*256
GLubyte pixel[4];
glReadPixels(mousepos.x(), height - mousepos.y(), 1, 1,
GL_RGBA, GL_UNSIGNED_BYTE, (void *)pixel);
// These work with desktop OpenGL
// They offer a lot higher possible object count and a possibility to use object id's
//GLuint pixel2[3];
//glReadPixels(mousepos.x(), height - mousepos.y(), 1, 1,
// GL_RGB, GL_UNSIGNED_INT, (void *)pixel2);
//GLfloat pixel3[3];
//glReadPixels(mousepos.x(), height - mousepos.y(), 1, 1,
// GL_RGB, GL_FLOAT, (void *)pixel3);
//qDebug() << "rgba" << pixel[0] << pixel[1] << pixel[2];// << pixel[3];
//qDebug() << "rgba2" << pixel2[0] << pixel2[1] << pixel2[2];
//qDebug() << "rgba3" << pixel3[0] << pixel3[1] << pixel3[2];
selectedColor = QVector3D(pixel[0], pixel[1], pixel[2]);
//qDebug() << selectedColor;
return selectedColor;
}
QTCOMMERCIALDATAVIS3D_END_NAMESPACE
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