ImageShape Class Reference

#include <displayshape.h>

Inheritance diagram for ImageShape:

[legend]Collaboration diagram for ImageShape:

[legend]List of all members.

---

Detailed Description

Definition at line 106 of file displayshape.h.

Public Member Functions
	ImageShape (const QImage &original, const QPointF &position, const QSizeF &maxSize, int alpha=0, Qt::Alignment alignment=Qt::AlignCenter)
bool	animate ()
void	paint (QPainter *painter) const
QRectF	rect () const
Private Member Functions
void	redraw ()
Private Attributes
int	alpha
QImage	source
QPointF	offset
Qt::Alignment	alignment

---

Constructor & Destructor Documentation

ImageShape::ImageShape	(	const QImage &	original,
		const QPointF &	position,
		const QSizeF &	maxSize,
		int	alpha = 0,
		Qt::Alignment	alignment = Qt::AlignCenter
	)

Definition at line 288 of file displayshape.cpp.

References Qt::AlignBottom, Qt::AlignHCenter, Qt::AlignRight, Qt::AlignVCenter, ceil, QImage::convertToFormat(), QImage::Format_ARGB32_Premultiplied, QImage::height(), QSizeF::height(), DisplayShape::image, int, Qt::KeepAspectRatio, DisplayShape::maxSize, offset, qMin(), redraw(), scale(), QImage::scaled(), QPointF::setX(), QPointF::setY(), Qt::SmoothTransformation, source, QImage::width(), and QSizeF::width().

    : DisplayShape(position, maxSize), alpha(alpha), alignment(alignment)
{
    source = original.convertToFormat(QImage::Format_ARGB32_Premultiplied);
    qreal scale = qMin(qMin(maxSize.width()/source.width(),
                            maxSize.height()/source.height()), qreal(1.0));

    source = source.scaled(int(ceil(source.width() * scale)),
                           int(ceil(source.height() * scale)),
                           Qt::KeepAspectRatio,
                           Qt::SmoothTransformation);

    image = QImage(source.size(), QImage::Format_ARGB32_Premultiplied);

    offset = QPointF(0.0, 0.0);

    if (alignment & Qt::AlignHCenter)
        offset.setX((maxSize.width() - image.width())/2);
    else if (alignment & Qt::AlignRight)
        offset.setX(maxSize.width() - image.width());

    if (alignment & Qt::AlignVCenter)
        offset.setY((maxSize.height() - image.height())/2);
    else if (alignment & Qt::AlignBottom)
        offset.setY(maxSize.height() - image.height());

    redraw();
}

Here is the call graph for this function:

---

Member Function Documentation

bool ImageShape::animate

(

)

[virtual]

Reimplemented from DisplayShape.

Definition at line 340 of file displayshape.cpp.

References alpha, DisplayShape::animate(), QHash< Key, T >::contains(), DisplayShape::meta, redraw(), QHash< Key, T >::remove(), QVariant::toInt(), and QHash< Key, T >::value().

{
    bool updated = false;

    if (!meta.contains("destroy")) {
        if (meta.contains("fade")) {
            alpha = qBound(meta.value("fade minimum").toInt(),
                           alpha + meta.value("fade").toInt(), 255);
            redraw();

            if (alpha == 0) {
                meta["destroy"] = true;
                meta.remove("fade");
            } else if (alpha == 255)
                meta.remove("fade");

            updated = true;
        }
    }

    return DisplayShape::animate() || updated;
}

Here is the call graph for this function:

void ImageShape::paint

(

QPainter *

painter

)

const [virtual]

Reimplemented from DisplayShape.

Definition at line 330 of file displayshape.cpp.

References QPainter::drawImage(), DisplayShape::image, offset, and DisplayShape::pos.

{
    painter->drawImage(pos + offset, image);
}

Here is the call graph for this function:

QRectF ImageShape::rect

(

)

const [virtual]

Reimplemented from DisplayShape.

Definition at line 335 of file displayshape.cpp.

References DisplayShape::maxSize, and DisplayShape::pos.

{
    return QRectF(pos, maxSize);
}

void ImageShape::redraw

(

)

[private]

Definition at line 319 of file displayshape.cpp.

References alpha, QPainter::begin(), QPainter::CompositionMode_SourceIn, QPainter::drawImage(), QPainter::end(), QImage::fill(), DisplayShape::image, qRgba(), QPainter::setCompositionMode(), and source.

Referenced by animate(), and ImageShape().

{
    image.fill(qRgba(alpha, alpha, alpha, alpha));

    QPainter painter;
    painter.begin(&image);
    painter.setCompositionMode(QPainter::CompositionMode_SourceIn);
    painter.drawImage(0, 0, source);
    painter.end();
}

Here is the call graph for this function:

---

Member Data Documentation

int ImageShape::alpha [private]

Definition at line 120 of file displayshape.h.

Referenced by animate(), and redraw().

QImage ImageShape::source [private]

Definition at line 121 of file displayshape.h.

Referenced by ImageShape(), and redraw().

QPointF ImageShape::offset [private]

Definition at line 122 of file displayshape.h.

Referenced by ImageShape(), and paint().

Qt::Alignment ImageShape::alignment [private]

Definition at line 123 of file displayshape.h.

---

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

• examples/tools/qtdemo/displayshape.h
• examples/tools/qtdemo/displayshape.cpp

---