demos/qtdemo/menucontent.cpp

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 2009 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.
   8 **
   9 ** $QT_BEGIN_LICENSE:LGPL$
  10 ** No Commercial Usage
  11 ** This file contains pre-release code and may not be distributed.
  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.
  15 **
  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
  22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  23 **
  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.
  27 **
  28 ** If you have questions regarding the use of this file, please contact
  29 ** Nokia at qt-info@nokia.com.
  30 **
  31 **
  32 **
  33 **
  34 **
  35 **
  36 **
  37 **
  38 ** $QT_END_LICENSE$
  39 **
  40 ****************************************************************************/
  41
  42 #include "menucontent.h"
  43 #include "colors.h"
  44 #include "menumanager.h"
  45 #include "demotextitem.h"
  46 #include "headingitem.h"
  47
  48 MenuContentItem::MenuContentItem(const QDomElement &el, QGraphicsScene *scene, QGraphicsItem *parent)
  49     : DemoItem(scene, parent)
  50 {
  51     this->name = el.attribute("name");
  52     this->heading = 0;
  53     this->description1 = 0;
  54     this->description2 = 0;
  55
  56     if (el.tagName() == "demos")
  57         this->readmePath = QLibraryInfo::location(QLibraryInfo::DemosPath) + "/README";
  58     else
  59         this->readmePath = QLibraryInfo::location(QLibraryInfo::ExamplesPath) + "/" + el.attribute("dirname") + "/README";
  60
  61 }
  62
  63 void MenuContentItem::prepare()
  64 {
  65     if (!this->prepared){
  66         this->prepared= true;
  67         this->createContent();
  68     }
  69 }
  70
  71 void MenuContentItem::animationStopped(int id)
  72 {
  73     if (this->name == Colors::rootMenuName)
  74         return; // Optimization hack.
  75
  76     if (id == DemoItemAnimation::ANIM_OUT){
  77         // Free up some memory:
  78         delete this->heading;
  79         delete this->description1;
  80         delete this->description2;
  81         this->heading = 0;
  82         this->description1 = 0;
  83         this->description2 = 0;
  84         this->prepared = false;
  85     }
  86 }
  87
  88 QString MenuContentItem::loadDescription(int startPara, int nrPara)
  89 {
  90     QString result;
  91     QFile readme(this->readmePath);
  92     if (!readme.open(QFile::ReadOnly)){
  93         if (Colors::verbose)
  94             qDebug() << "- MenuContentItem::loadDescription: Could not load:" << this->readmePath;
  95         return "";
  96     }
  97
  98     QTextStream in(&readme);
  99     // Skip a certain number of paragraphs:
 100     while (startPara)
 101         if (in.readLine().isEmpty()) --startPara;
 102
 103     // Read in the number of wanted paragraphs:
 104     QString line = in.readLine();
 105     do {
 106         result += line + " ";
 107         line = in.readLine();
 108         if (line.isEmpty()){
 109             --nrPara;
 110             line = "<br><br>" + in.readLine();
 111         }
 112     } while (nrPara && !in.atEnd());
 113
 114     return Colors::contentColor + result;
 115 }
 116
 117 void MenuContentItem::createContent()
 118 {
 119     // Create the items:
 120     this->heading = new HeadingItem(this->name, this->scene(), this);
 121     QString para1 = this->loadDescription(0, 1);
 122     if (para1.isEmpty())
 123         para1 = Colors::contentColor + QLatin1String("Could not load description. Ensure that the documentation for Qt is built.");
 124     QColor bgcolor = Colors::sceneBg1.darker(200);
 125     bgcolor.setAlpha(100);
 126     this->description1 = new DemoTextItem(para1, Colors::contentFont(), Colors::heading, 500, this->scene(), this, DemoTextItem::STATIC_TEXT);
 127     this->description2 = new DemoTextItem(this->loadDescription(1, 2), Colors::contentFont(), Colors::heading, 250, this->scene(), this, DemoTextItem::STATIC_TEXT);
 128
 129     // Place the items on screen:
 130     this->heading->setPos(0, 3);
 131     this->description1->setPos(0, this->heading->pos().y() + this->heading->boundingRect().height() + 10);
 132     this->description2->setPos(0, this->description1->pos().y() + this->description1->boundingRect().height() + 15);
 133 }
 134
 135 QRectF MenuContentItem::boundingRect() const
 136 {
 137     return QRectF(0, 0, 500, 350);
 138 }
 139
 140