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     2 **

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

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

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

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

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    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include "demotextitem.h"

    43 #include "colors.h"

    44 

    45 DemoTextItem::DemoTextItem(const QString &text, const QFont &font, const QColor &textColor,

    46                            float textWidth, QGraphicsScene *scene, QGraphicsItem *parent, TYPE type, const QColor &bgColor)

    47                            : DemoItem(scene, parent)

    48 {

    49     this->type = type;

    50     this->text = text;

    51     this->font = font;

    52     this->textColor = textColor;

    53     this->bgColor = bgColor;

    54     this->textWidth = textWidth;

    55     this->noSubPixeling = true;

    56 }

    57 

    58 void DemoTextItem::setText(const QString &text)

    59 {

    60     this->text = text;

    61     this->update();

    62 }

    63 

    64 QImage *DemoTextItem::createImage(const QMatrix &matrix) const

    65 {

    66     if (this->type == DYNAMIC_TEXT)

    67         return 0;

    68 

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

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

    71 

    72     QGraphicsTextItem textItem(0, 0);

    73     textItem.setHtml(this->text);

    74     textItem.setTextWidth(this->textWidth);

    75     textItem.setFont(this->font);

    76     textItem.setDefaultTextColor(this->textColor);

    77     textItem.document()->setDocumentMargin(2);

    78 

    79     float w = textItem.boundingRect().width();

    80     float h = textItem.boundingRect().height();

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

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

    83     QPainter painter(image);

    84     painter.scale(sx, sy);

    85     QStyleOptionGraphicsItem style;

    86     textItem.paint(&painter, &style, 0);

    87     return image;

    88 }

    89 

    90 

    91 void DemoTextItem::animationStarted(int)

    92 {

    93     this->noSubPixeling = false;

    94 }

    95 

    96 

    97 void DemoTextItem::animationStopped(int)

    98 {

    99     this->noSubPixeling = true;

   100 }

   101 

   102 QRectF DemoTextItem::boundingRect() const

   103 

   104 {

   105     if (this->type == STATIC_TEXT)

   106         return DemoItem::boundingRect();

   107     return QRectF(0, 0, 50, 20); // Sorry for using magic number

   108 }

   109 

   110 

   111 void DemoTextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

   112 {

   113     Q_UNUSED(option);

   114     Q_UNUSED(widget);

   115 

   116     if (this->type == STATIC_TEXT) {

   117         DemoItem::paint(painter, option, widget);

   118         return;

   119     }

   120 

   121     painter->setPen(this->textColor);

   122     painter->drawText(0, 0, this->text);

   123 }