demos/qtdemo/menucontent.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 00:43:10 +0200
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permissions -rw-r--r--
Revision: 201003 Kit: 201005
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "menucontent.h"
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#include "colors.h"
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#include "menumanager.h"
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#include "demotextitem.h"
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#include "headingitem.h"
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MenuContentItem::MenuContentItem(const QDomElement &el, QGraphicsScene *scene, QGraphicsItem *parent)
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    : DemoItem(scene, parent)
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{
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    this->name = el.attribute("name");
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    this->heading = 0;
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    this->description1 = 0;
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    this->description2 = 0;
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    if (el.tagName() == "demos")
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        this->readmePath = QLibraryInfo::location(QLibraryInfo::DemosPath) + "/README";
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    else
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        this->readmePath = QLibraryInfo::location(QLibraryInfo::ExamplesPath) + "/" + el.attribute("dirname") + "/README";
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}
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void MenuContentItem::prepare()
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{
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    if (!this->prepared){
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        this->prepared= true;
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        this->createContent();
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    }
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}
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void MenuContentItem::animationStopped(int id)
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{
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    if (this->name == Colors::rootMenuName)
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        return; // Optimization hack.
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    if (id == DemoItemAnimation::ANIM_OUT){
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        // Free up some memory:
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        delete this->heading;
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        delete this->description1;
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        delete this->description2;
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        this->heading = 0;
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        this->description1 = 0;
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        this->description2 = 0;
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        this->prepared = false;
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    }
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}
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QString MenuContentItem::loadDescription(int startPara, int nrPara)
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{
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    QString result;
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    QFile readme(this->readmePath);
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    if (!readme.open(QFile::ReadOnly)){
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        if (Colors::verbose)
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            qDebug() << "- MenuContentItem::loadDescription: Could not load:" << this->readmePath;
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        return "";
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    }
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    QTextStream in(&readme);
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    // Skip a certain number of paragraphs:
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    while (startPara)
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        if (in.readLine().isEmpty()) --startPara;
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    // Read in the number of wanted paragraphs:
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    QString line = in.readLine();
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    do {
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        result += line + " ";
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        line = in.readLine();
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        if (line.isEmpty()){
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            --nrPara;
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            line = "<br><br>" + in.readLine();
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        }
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    } while (nrPara && !in.atEnd());
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    return Colors::contentColor + result;
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}
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void MenuContentItem::createContent()
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{
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    // Create the items:
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    this->heading = new HeadingItem(this->name, this->scene(), this);
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    QString para1 = this->loadDescription(0, 1);
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    if (para1.isEmpty())
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        para1 = Colors::contentColor + QLatin1String("Could not load description. Ensure that the documentation for Qt is built.");
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    QColor bgcolor = Colors::sceneBg1.darker(200);
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    bgcolor.setAlpha(100);
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    this->description1 = new DemoTextItem(para1, Colors::contentFont(), Colors::heading, 500, this->scene(), this, DemoTextItem::STATIC_TEXT);
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    this->description2 = new DemoTextItem(this->loadDescription(1, 2), Colors::contentFont(), Colors::heading, 250, this->scene(), this, DemoTextItem::STATIC_TEXT);
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    // Place the items on screen:
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    this->heading->setPos(0, 3);
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    this->description1->setPos(0, this->heading->pos().y() + this->heading->boundingRect().height() + 10);
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    this->description2->setPos(0, this->description1->pos().y() + this->description1->boundingRect().height() + 15);
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}
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QRectF MenuContentItem::boundingRect() const
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{
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    return QRectF(0, 0, 500, 350);
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}
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