BasicToolsPlugin Class Reference

#include <basictoolsplugin.h>

Inheritance diagram for BasicToolsPlugin:

[legend]Collaboration diagram for BasicToolsPlugin:

[legend]List of all members.

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Detailed Description

Definition at line 35 of file basictoolsplugin.h.

Public Member Functions
QStringList	brushes () const
QRect	mousePress (const QString &brush, QPainter &painter, const QPoint &pos)
QRect	mouseMove (const QString &brush, QPainter &painter, const QPoint &oldPos, const QPoint &newPos)
QRect	mouseRelease (const QString &brush, QPainter &painter, const QPoint &pos)
QStringList	shapes () const
QPainterPath	generateShape (const QString &shape, QWidget *parent)
QStringList	filters () const
QImage	filterImage (const QString &filter, const QImage &image, QWidget *parent)

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Member Function Documentation

QStringList BasicToolsPlugin::brushes

(

)

const [virtual]

Implements BrushInterface.

Definition at line 33 of file basictoolsplugin.cpp.

{
    return QStringList() << tr("Pencil") << tr("Air Brush")
                         << tr("Random Letters");
}

QRect BasicToolsPlugin::mousePress	(	const QString &	brush,
		QPainter &	painter,
		const QPoint &	pos
	)			[virtual]

Implements BrushInterface.

Definition at line 39 of file basictoolsplugin.cpp.

References mouseMove().

{
    return mouseMove(brush, painter, pos, pos);
}

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QRect BasicToolsPlugin::mouseMove	(	const QString &	brush,
		QPainter &	painter,
		const QPoint &	oldPos,
		const QPoint &	newPos
	)			[virtual]

Implements BrushInterface.

Definition at line 45 of file basictoolsplugin.cpp.

References QColor::blue, QPen::color(), Qt::Dense6Pattern, QPainter::drawEllipse(), QPainter::drawLine(), QPainter::drawText(), QPainter::font(), QColor::green, i, metrics(), Qt::NoPen, QPainter::pen(), QFont::pointSize(), qrand(), QColor::red, QPainter::restore(), QPainter::save(), QFont::setBold(), QPainter::setBrush(), QPainter::setFont(), QPainter::setPen(), QFont::setPointSize(), QPen::width(), QPoint::x(), x, QPoint::y(), and y.

Referenced by mousePress().

{
    painter.save();

    int rad = painter.pen().width() / 2;
    QRect boundingRect = QRect(oldPos, newPos).normalized()
                                              .adjusted(-rad, -rad, +rad, +rad);
    QColor color = painter.pen().color();
    int thickness = painter.pen().width();
    QColor transparentColor(color.red(), color.green(), color.blue(), 0);

    if (brush == tr("Pencil")) {
        painter.drawLine(oldPos, newPos);
    } else if (brush == tr("Air Brush")) {
        int numSteps = 2 + (newPos - oldPos).manhattanLength() / 2;

        painter.setBrush(QBrush(color, Qt::Dense6Pattern));
        painter.setPen(Qt::NoPen);

        for (int i = 0; i < numSteps; ++i) {
            int x = oldPos.x() + i * (newPos.x() - oldPos.x()) / (numSteps - 1);
            int y = oldPos.y() + i * (newPos.y() - oldPos.y()) / (numSteps - 1);

            painter.drawEllipse(x - (thickness / 2), y - (thickness / 2),
                                thickness, thickness);
        }
    } else if (brush == tr("Random Letters")) {
        QChar ch('A' + (qrand() % 26));

        QFont biggerFont = painter.font();
        biggerFont.setBold(true);
        biggerFont.setPointSize(biggerFont.pointSize() + thickness);
        painter.setFont(biggerFont);

        painter.drawText(newPos, QString(ch));

        QFontMetrics metrics(painter.font());
        boundingRect = metrics.boundingRect(ch);
        boundingRect.translate(newPos);
        boundingRect.adjust(-10, -10, +10, +10);
    }
    painter.restore();
    return boundingRect;
}

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QRect BasicToolsPlugin::mouseRelease	(	const QString &	brush,
		QPainter &	painter,
		const QPoint &	pos
	)			[virtual]

Implements BrushInterface.

Definition at line 91 of file basictoolsplugin.cpp.

{
    return QRect(0, 0, 0, 0);
}

QStringList BasicToolsPlugin::shapes

(

)

const [virtual]

Implements ShapeInterface.

Definition at line 98 of file basictoolsplugin.cpp.

{
    return QStringList() << tr("Circle") << tr("Star") << tr("Text...");
}

QPainterPath BasicToolsPlugin::generateShape	(	const QString &	shape,
		QWidget *	parent
	)			[virtual]

Implements ShapeInterface.

Definition at line 103 of file basictoolsplugin.cpp.

References QFont::ForceOutline, QInputDialog::getText(), i, QString::isEmpty(), QLineEdit::Normal, QObject::parent(), path, and Pi.

{
    QPainterPath path;

    if (shape == tr("Circle")) {
        path.addEllipse(0, 0, 50, 50);
    } else if (shape == tr("Star")) {
        path.moveTo(90, 50);
        for (int i = 1; i < 5; ++i) {
            path.lineTo(50 + 40 * cos(0.8 * i * Pi),
                        50 + 40 * sin(0.8 * i * Pi));
        }
        path.closeSubpath();
    } else if (shape == tr("Text...")) {
        QString text = QInputDialog::getText(parent, tr("Text Shape"),
                                             tr("Enter text:"),
                                             QLineEdit::Normal, tr("Qt"));
        if (!text.isEmpty()) {
            QFont timesFont("Times", 50);
            timesFont.setStyleStrategy(QFont::ForceOutline);
            path.addText(0, 0, timesFont, text);
        }
    }

    return path;
}

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QStringList BasicToolsPlugin::filters

(

)

const [virtual]

Implements FilterInterface.

Definition at line 131 of file basictoolsplugin.cpp.

{
    return QStringList() << tr("Invert Pixels") << tr("Swap RGB")
                         << tr("Grayscale");
}

QImage BasicToolsPlugin::filterImage	(	const QString &	filter,
		const QImage &	image,
		QWidget *	parent
	)			[virtual]

Implements FilterInterface.

Definition at line 137 of file basictoolsplugin.cpp.

References alpha, QImage::Format_RGB32, Qt::gray, QImage::height(), image, QImage::invertPixels(), QImage::pixel(), qAlpha(), qGray(), qRgba(), QImage::rgbSwapped(), QImage::setPixel(), QImage::width(), x, and y.

{
    QImage result = image.convertToFormat(QImage::Format_RGB32);

    if (filter == tr("Invert Pixels")) {
        result.invertPixels();
    } else if (filter == tr("Swap RGB")) {
        result = result.rgbSwapped();
    } else if (filter == tr("Grayscale")) {
        for (int y = 0; y < result.height(); ++y) {
            for (int x = 0; x < result.width(); ++x) {
                int pixel = result.pixel(x, y);
                int gray = qGray(pixel);
                int alpha = qAlpha(pixel);
                result.setPixel(x, y, qRgba(gray, gray, gray, alpha));
            }
        }
    }
    return result;
}

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The documentation for this class was generated from the following files:

• examples/tools/plugandpaintplugins/basictools/basictoolsplugin.h
• examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp

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