DocumentShape Class Reference

#include <displayshape.h>

Inheritance diagram for DocumentShape:

[legend]Collaboration diagram for DocumentShape:

[legend]List of all members.

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Detailed Description

Definition at line 126 of file displayshape.h.

Public Member Functions
	DocumentShape (const QString &text, const QFont &font, const QPointF &position, const QSizeF &maxSize, int alpha=0)
	~DocumentShape ()
bool	animate ()
void	paint (QPainter *painter) const
QRectF	rect () const
Private Member Functions
void	redraw ()
Private Attributes
QImage	source
int	alpha
QTextDocument	textDocument

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Constructor & Destructor Documentation

DocumentShape::DocumentShape	(	const QString &	text,
		const QFont &	font,
		const QPointF &	position,
		const QSizeF &	maxSize,
		int	alpha = 0
	)

Definition at line 363 of file displayshape.cpp.

References QPainter::Antialiasing, QPainter::begin(), ceil, QTextDocument::documentLayout(), QAbstractTextDocumentLayout::documentSize(), QAbstractTextDocumentLayout::draw(), QPainter::end(), QImage::fill(), QImage::Format_ARGB32_Premultiplied, QSizeF::height(), DisplayShape::image, int, Qt::KeepAspectRatio, DisplayShape::maxSize, qMin(), qRgba(), redraw(), QTextDocument::setDefaultFont(), QTextDocument::setHtml(), QTextDocument::setPageSize(), QAbstractTextDocumentLayout::setPaintDevice(), QPainter::setRenderHint(), DisplayShape::setSize(), Qt::SmoothTransformation, source, QPainter::TextAntialiasing, textDocument, and QSizeF::width().

    : DisplayShape(position, maxSize), alpha(alpha)
{
    textDocument.setHtml(text);
    textDocument.setDefaultFont(font);
    textDocument.setPageSize(maxSize);
    QSizeF documentSize = textDocument.documentLayout()->documentSize();
    setSize(QSizeF(maxSize.width(),
                      qMin(maxSize.height(), documentSize.height())));

    source = QImage(int(ceil(documentSize.width())),
                    int(ceil(documentSize.height())),
                    QImage::Format_ARGB32_Premultiplied);
    source.fill(qRgba(255, 255, 255, 255));

    QAbstractTextDocumentLayout::PaintContext context;
    textDocument.documentLayout()->setPaintDevice(&source);

    QPainter painter;
    painter.begin(&source);
    painter.setRenderHint(QPainter::TextAntialiasing);
    painter.setRenderHint(QPainter::Antialiasing);
    textDocument.documentLayout()->draw(&painter, context);
    painter.end();

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

    image = QImage(source.size(), source.format());
    redraw();
}

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DocumentShape::~DocumentShape

(

)

Definition at line 399 of file displayshape.cpp.

{
}

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Member Function Documentation

bool DocumentShape::animate

(

)

[virtual]

Reimplemented from DisplayShape.

Definition at line 403 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;
}

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void DocumentShape::paint

(

QPainter *

painter

)

const [virtual]

Reimplemented from DisplayShape.

Definition at line 437 of file displayshape.cpp.

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

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

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QRectF DocumentShape::rect

(

)

const [virtual]

Reimplemented from DisplayShape.

Definition at line 442 of file displayshape.cpp.

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

Referenced by Launcher::showExampleSummary().

{
    return QRectF(pos, maxSize);
}

void DocumentShape::redraw

(

)

[private]

Definition at line 426 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 DocumentShape().

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

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

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Member Data Documentation

QImage DocumentShape::source [private]

Definition at line 141 of file displayshape.h.

Referenced by DocumentShape(), and redraw().

int DocumentShape::alpha [private]

Definition at line 142 of file displayshape.h.

Referenced by animate(), and redraw().

QTextDocument DocumentShape::textDocument [private]

Definition at line 143 of file displayshape.h.

Referenced by DocumentShape().

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

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

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