/****************************************************************************

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** This file is part of the demonstration applications of the Qt Toolkit.

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** This file contains pre-release code and may not be distributed.

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** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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** 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

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****************************************************************************/

#include "headingitem.h"

#include "colors.h"

HeadingItem::HeadingItem(const QString &text, QGraphicsScene *scene, QGraphicsItem *parent)

    : DemoItem(scene, parent)

{

    this->text = text;

    this->noSubPixeling = true;

}

QImage *HeadingItem::createImage(const QMatrix &matrix) const

{

    float sx = qMin(matrix.m11(), matrix.m22());

    float sy = matrix.m22() < sx ? sx : matrix.m22();

    QFontMetrics fm(Colors::headingFont());

    float w = fm.width(this->text) + 1;

    float h = fm.height();

    float xShadow = 3.0f;

    float yShadow = 3.0f;

    QImage *image = new QImage(int((w + xShadow) * sx), int((h + yShadow) * sy), QImage::Format_ARGB32_Premultiplied);

    image->fill(QColor(0, 0, 0, 0).rgba());

    QPainter painter(image);

    painter.setFont(Colors::headingFont());

    painter.scale(sx, sy);

    //draw shadow

    QLinearGradient brush_shadow(xShadow, yShadow, w, yShadow);

    brush_shadow.setSpread(QLinearGradient::PadSpread);

    if (Colors::useEightBitPalette)

        brush_shadow.setColorAt(0.0f, QColor(0, 0, 0));

    else

        brush_shadow.setColorAt(0.0f, QColor(0, 0, 0, 100));

    QPen pen_shadow;

    pen_shadow.setBrush(brush_shadow);

    painter.setPen(pen_shadow);

    painter.drawText(int(xShadow), int(yShadow), int(w), int(h), Qt::AlignLeft, this->text);

    // draw text

    QLinearGradient brush_text(0, 0, w, w);

    brush_text.setSpread(QLinearGradient::PadSpread);

    brush_text.setColorAt(0.0f, QColor(255, 255, 255));

    brush_text.setColorAt(0.2f, QColor(255, 255, 255));

    brush_text.setColorAt(0.5f, QColor(190, 190, 190));

    QPen pen_text;

    pen_text.setBrush(brush_text);

    painter.setPen(pen_text);

    painter.drawText(0, 0, int(w), int(h), Qt::AlignLeft, this->text);

    return image;

}

void HeadingItem::animationStarted(int)

{

    this->noSubPixeling = false;

}

void HeadingItem::animationStopped(int)

{

    this->noSubPixeling = true;

}