src/mvc/delegate.cpp

   1 /*
   2  * Copyright (C) 2010 Ixonos Plc.
   3  *
   4  * This file is part of fosdem-schedule.
   5  *
   6  * fosdem-schedule is free software: you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation, either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * fosdem-schedule is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * fosdem-schedule.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "delegate.h"
  20 #include "eventmodel.h"
  21 #include <track.h>
  22
  23 #include <QDebug>
  24 #include <QPainter>
  25
  26 #include "room.h"
  27
  28 const int RADIUS = 10;
  29 const int SPACER = 10;
  30
  31 const double scaleFactor1 = 0.4;
  32 const double scaleFactor2 = 0.8;
  33
  34 Delegate::Delegate(QTreeView *aParent)
  35     : QItemDelegate(aParent)
  36     , mViewPtr(aParent)
  37 {
  38     mControls.clear();
  39     defineControls();
  40 }
  41
  42 Delegate::~Delegate()
  43 {
  44     QListIterator<ControlId> i(mControls.keys());
  45     while (i.hasNext())
  46     {
  47         delete mControls[i.next()]->image();
  48     }
  49 }
  50
  51 void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
  52 {
  53     if(!mViewPtr)
  54         return;
  55
  56     painter->save();
  57     QColor bkgrColor = Qt::cyan;
  58     //QColor bkgrColor = QColor(0xAA,0xAA,0xAA);
  59     QColor conflictColor = Qt::yellow;
  60
  61     QPen borderPen(bkgrColor.darker());
  62     if(hasParent(index))
  63     {
  64         // entry horisontal layout:
  65         // * spacer (aka y position of image)
  66         // * image
  67         // * rest is text, which is 1 line of title with big letters and 2 lines of Presenter and Track
  68         int aux = option.rect.height() - SPACER - mControls[FavouriteControlOn]->image()->height();
  69         Event *event = static_cast<Event*>(index.internalPointer());
  70         // font SMALL
  71         QFont fontSmall = option.font;
  72         fontSmall.setBold(false);
  73         fontSmall.setPixelSize(aux*0.2);
  74         QFontMetrics fmSmall(fontSmall);
  75         // font SMALL bold
  76         QFont fontSmallB = fontSmall;
  77         fontSmallB.setBold(true);
  78         QFontMetrics fmSmallB(fontSmallB);
  79
  80         // font BIG
  81         QFont fontBig = option.font;
  82         fontBig.setBold(false);
  83         fontBig.setPixelSize(aux*0.33);
  84         QFontMetrics fmBig(fontBig);
  85         // font BIG bold
  86         QFont fontBigB = fontBig;
  87         fontBigB.setBold(true);
  88         QFontMetrics fmBigB(fontBigB);
  89
  90         //int spacer = (fmSmall.boundingRect("999").width() < SPACER) ? SPACER : fmSmall.boundingRect("999").width();
  91
  92         //Time conflicts are colored differently
  93         if(event->hasTimeConflict())
  94             bkgrColor = conflictColor;
  95
  96         QLinearGradient itemGradient(option.rect.topLeft(), option.rect.bottomLeft());
  97         itemGradient.setColorAt(0.0, Qt::white);
  98         itemGradient.setColorAt(0.25, bkgrColor);
  99         itemGradient.setColorAt(0.5, bkgrColor);
 100         itemGradient.setColorAt(0.75, bkgrColor);
 101         itemGradient.setColorAt(1.0, Qt::white);
 102
 103         if(isLast(index))
 104         {
 105             QPainterPath endPath;
 106             endPath.moveTo(option.rect.topLeft());
 107             endPath.lineTo(option.rect.bottomLeft()-QPoint(0, RADIUS));
 108             endPath.arcTo(option.rect.left(), option.rect.bottom()-2*RADIUS, 2*RADIUS, 2*RADIUS, 180, 90);
 109             endPath.lineTo(option.rect.bottomRight()-QPoint(RADIUS, 0));
 110             endPath.arcTo(option.rect.right()-2*RADIUS, option.rect.bottom()-2*RADIUS, 2*RADIUS, 2*RADIUS, 270, 90);
 111             endPath.lineTo(option.rect.topRight());
 112
 113             //painter->setBrush( bkgrColor );
 114             painter->setBrush(itemGradient);
 115             painter->setPen(borderPen);
 116             painter->drawPath(endPath);
 117
 118             painter->setFont(option.font);
 119         }
 120         else // middle elements
 121         {
 122             //painter->setBrush( bkgrColor );
 123             painter->setBrush(itemGradient);
 124             painter->setPen(Qt::NoPen);
 125             painter->drawRect(option.rect);
 126
 127             painter->setPen(borderPen);
 128             // vertical lines
 129             painter->drawLine(option.rect.topLeft(), option.rect.bottomLeft());
 130             painter->drawLine(option.rect.topRight(), option.rect.bottomRight());
 131             // horizontal lines
 132             painter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());
 133
 134             painter->setFont(option.font);
 135         }
 136
 137         // draw Controls
 138         foreach(Control* c, mControls.values()) {
 139             c->setEnabled(false);
 140         }
 141         if(event->isFavourite())
 142             mControls[FavouriteControlOn]->paint(painter, option.rect);
 143         else
 144             mControls[FavouriteControlOff]->paint(painter, option.rect);
 145 #ifdef MAEMO
 146         if(event->hasAlarm())
 147             mControls[AlarmControlOn]->paint(painter, option.rect);
 148         else
 149             mControls[AlarmControlOff]->paint(painter, option.rect);
 150 #endif
 151         if (event->room()->hasMap())
 152             mControls[MapControl]->paint(painter, option.rect);
 153         if(event->hasTimeConflict())
 154             mControls[WarningControl]->paint(painter, option.rect);
 155
 156         // draw texts
 157         // it starts just below the image
 158         // ("position of text" is lower-left angle of the first letter,
 159         //  so the first line is actually at the same height as the image)
 160         QPointF titlePointF(option.rect.x() + SPACER,
 161                             option.rect.y() + SPACER + mControls[FavouriteControlOn]->image()->height());
 162         QTime start = event->start().time();
 163         painter->setFont(fontBig);
 164         painter->drawText(titlePointF,start.toString("hh:mm") + "-" + start.addSecs(event->duration()).toString("hh:mm") + ", " + event->roomName());
 165         // title
 166         titlePointF.setY(titlePointF.y()+fmBig.height()-fmBig.descent());
 167         painter->setFont(fontBigB);
 168         QString title = event->title();
 169         if(fmBigB.boundingRect(title).width() > (option.rect.width()-2*SPACER)) // the title won't fit the screen
 170         {
 171             // chop words from the end
 172             while( (fmBigB.boundingRect(title + "...").width() > (option.rect.width()-2*SPACER)) && !title.isEmpty())
 173             {
 174                 title.chop(1);
 175                 // chop characters one-by-one from the end
 176                 while( (!title.at(title.length()-1).isSpace()) && !title.isEmpty())
 177                 {
 178                     title.chop(1);
 179                 }
 180             }
 181             title += "...";
 182         }
 183         painter->drawText(titlePointF,title);
 184         // persons
 185         titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
 186         painter->setFont(fontSmall);
 187         painter->drawText(titlePointF,"Presenter(s): " + event->persons().join(" and "));
 188         // track
 189         titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
 190         painter->drawText(titlePointF,"Track: " + Track::retrieveTrackName(event->trackId()));
 191     }
 192     else // doesn't have parent - time-groups' elements (top items)
 193     {
 194         QFont fontSmall = option.font;
 195         fontSmall.setBold(true);
 196         fontSmall.setPixelSize(option.rect.height()*scaleFactor1);
 197         QFontMetrics fmSmall(fontSmall);
 198
 199         QFont fontBig = option.font;
 200         fontBig.setBold(true);
 201         fontBig.setPixelSize(option.rect.height()*scaleFactor2);
 202         QFontMetrics fmBig(fontBig);
 203
 204         int spacer = (fmSmall.boundingRect("999").width() < SPACER) ? SPACER : fmSmall.boundingRect("999").width();
 205
 206         QLinearGradient titleGradient(option.rect.topLeft(), option.rect.topRight());
 207         //titleGradient.setColorAt(0.0, Qt::white);
 208         titleGradient.setColorAt(0.0, bkgrColor);
 209         titleGradient.setColorAt(0.5, Qt::white);
 210         titleGradient.setColorAt(1.0, bkgrColor);
 211
 212         QPainterPath titlePath;
 213         if(isExpanded(index))
 214         {
 215             titlePath.moveTo(option.rect.bottomLeft());
 216             titlePath.lineTo(option.rect.topLeft()+QPoint(0, RADIUS));
 217             titlePath.arcTo(option.rect.left(), option.rect.top(), 2*RADIUS, 2*RADIUS, 180, -90);
 218             titlePath.lineTo(option.rect.topRight()-QPoint(RADIUS, 0));
 219             titlePath.arcTo(option.rect.right()-2*RADIUS, option.rect.top(), 2*RADIUS, 2*RADIUS, 90, -90);
 220             titlePath.lineTo(option.rect.bottomRight());
 221             titlePath.closeSubpath();
 222         }
 223         else
 224         {
 225             titlePath.lineTo(option.rect.topLeft()+QPoint(0, RADIUS));
 226             titlePath.arcTo(option.rect.left(), option.rect.top(), 2*RADIUS, 2*RADIUS, 180, -90);
 227             titlePath.lineTo(option.rect.topRight()-QPoint(RADIUS, 0));
 228             titlePath.arcTo(option.rect.right()-2*RADIUS, option.rect.top(), 2*RADIUS, 2*RADIUS, 90, -90);
 229             titlePath.lineTo(option.rect.bottomRight()-QPoint(0, RADIUS));
 230             titlePath.arcTo(option.rect.right()-2*RADIUS, option.rect.bottom()-2*RADIUS, 2*RADIUS, 2*RADIUS, 0, -90);
 231             titlePath.lineTo(option.rect.bottomLeft()+QPoint(RADIUS, 0));
 232             titlePath.arcTo(option.rect.left(), option.rect.bottom()-2*RADIUS, 2*RADIUS, 2*RADIUS, 270, -90);
 233             titlePath.closeSubpath();
 234         }
 235
 236         painter->setBrush(titleGradient);
 237         painter->setPen(borderPen);
 238         painter->drawPath(titlePath);
 239
 240         // draw icons
 241         painter->setFont(fontSmall);
 242         QImage *image = mControls[FavouriteControlOn]->image();
 243         QPoint drawPoint =
 244             option.rect.topRight()
 245             - QPoint(
 246                     spacer + image->width(),
 247                     - option.rect.height()/2 + image->height()/2);
 248         painter->drawImage(drawPoint,*image);
 249         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 250                 QString::number(numberOfFavourities(index)));
 251 #ifdef MAEMO
 252         drawPoint.setX(drawPoint.x() - spacer - image->width());
 253         painter->drawImage(drawPoint,*mControls[AlarmControlOn]->image());
 254         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 255                 QString::number(numberOfAlarms(index)));
 256 #endif
 257         // draw texts
 258         QString numEvents = QString::number(index.model()->rowCount(index)).append("/");
 259         drawPoint.setX(drawPoint.x() - spacer - fmSmall.boundingRect(numEvents).width());
 260         drawPoint.setY(drawPoint.y()+image->height() - 2);
 261         painter->drawText(drawPoint,numEvents);
 262
 263         QPointF titlePointF = QPoint(
 264                 option.rect.x()+SPACER,
 265                 option.rect.y()+option.rect.height()-fmBig.descent());
 266         painter->setFont(fontBig);
 267
 268         painter->drawText(titlePointF,qVariantValue<QString>(index.data()));
 269     }
 270
 271     //// HIGHLIGHTING SELECTED ITEM
 272     //if (option.state & QStyle::State_Selected)
 273         //painter->fillRect(option.rect, option.palette.highlight());
 274
 275     painter->restore();
 276 }
 277
 278 QSize Delegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 279 {
 280     Q_UNUSED(option)
 281
 282     if (index.internalId() == 0) // time group
 283     {
 284         return QSize(40,40);
 285     }
 286     else // event
 287     {
 288         return QSize(100,100);
 289     }
 290 }
 291
 292 bool Delegate::hasParent( const QModelIndex &index ) const
 293 {
 294     if( index.parent().isValid() )
 295         return true;
 296     else
 297         return false;
 298 }
 299
 300 bool Delegate::isLast( const QModelIndex &index ) const
 301 {
 302     if(!hasParent(index))
 303         return false; // what should be returned here?
 304
 305     if(index.row() >= (index.model()->rowCount(index.parent())-1))
 306         return true;
 307     else
 308         return false;
 309 }
 310
 311 bool Delegate::isExpanded( const QModelIndex &index ) const
 312 {
 313     if( !mViewPtr )
 314         return false;
 315     else
 316         return mViewPtr->isExpanded( index );
 317 }
 318
 319 Delegate::ControlId Delegate::whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const
 320 {
 321     if(!hasParent(aIndex)) // time-group item (root item)
 322         return ControlNone;
 323
 324     QListIterator<ControlId> i(mControls.keys());
 325     while (i.hasNext())
 326     {
 327         ControlId id = i.next();
 328         Control *control = mControls[id];
 329         if (control->enabled()
 330             and control->drawRect(static_cast<QTreeView*>(parent())->visualRect(aIndex)).contains(aPoint))
 331         {
 332             return id;
 333         }
 334     }
 335
 336     return ControlNone;
 337 }
 338
 339 Delegate::Control::Control(ControlId aControlId, const QString &aImageName, const Control* prev_control)
 340     : mId(aControlId)
 341     , mImage(new QImage(aImageName))
 342     , mDrawPoint(QPoint(0,0))
 343     , mEnabled(false)
 344 {
 345     QPoint p;
 346     if (prev_control == NULL) {
 347         p = QPoint(0, SPACER);
 348     } else {
 349         p = prev_control->drawPoint();
 350     }
 351     p.setX(p.x()-image()->width()-SPACER);
 352     setDrawPoint(p);
 353 }
 354
 355 void Delegate::Control::paint(QPainter* painter, const QRect rect)
 356 {
 357     painter->drawImage(drawPoint(rect),*image());
 358     setEnabled(true);
 359 }
 360
 361 void Delegate::defineControls()
 362 {
 363     // FAVOURITE ICONs
 364     // on
 365     mControls.insert(FavouriteControlOn, new Control(FavouriteControlOn, QString(":icons/favourite-onBig.png"), NULL));
 366     // off
 367     mControls.insert(FavouriteControlOff, new Control(FavouriteControlOff, QString(":icons/favourite-offBig.png"), NULL));
 368
 369 #ifdef MAEMO
 370     // ALARM ICONs
 371     // on
 372     mControls.insert(AlarmControlOn,
 373                     new Control(AlarmControlOn, QString(":icons/alarm-onBig.png"), mControls[FavouriteControlOn]));
 374     // off
 375     mControls.insert(AlarmControlOff,
 376                     new Control(AlarmControlOff, QString(":icons/alarm-offBig.png"), mControls[FavouriteControlOff]));
 377
 378     // MAP ICON
 379     mControls.insert(MapControl,
 380                     new Control(MapControl, QString(":icons/compassBig.png"), mControls[AlarmControlOn]));
 381 #else
 382     // MAP ICON
 383     mControls.insert(MapControl,
 384                     new Control(MapControl, QString(":icons/compassBig.png"), mControls[FavouriteControlOn]));
 385 #endif
 386
 387     // WARNING ICON
 388     mControls.insert(WarningControl,
 389                     new Control(WarningControl, QString(":icons/exclamation.png"), mControls[MapControl]));
 390 }
 391
 392 bool Delegate::isPointFromRect(const QPoint &aPoint, const QRect &aRect) const
 393 {
 394     if( (aPoint.x()>=aRect.left() && aPoint.x()<=aRect.right()) && (aPoint.y()>=aRect.top() && aPoint.y()<=aRect.bottom()) )
 395         return true;
 396
 397     return false;
 398 }
 399
 400 int Delegate::numberOfFavourities(const QModelIndex &index) const
 401 {
 402     if(index.parent().isValid()) // it's event, not time-group
 403         return 0;
 404
 405     int nrofFavs = 0;
 406     for(int i=0; i<index.model()->rowCount(index); i++)
 407         if(static_cast<Event*>(index.child(i,0).internalPointer())->isFavourite())
 408             nrofFavs++;
 409
 410     return nrofFavs;
 411 }
 412
 413 int Delegate::numberOfAlarms(const QModelIndex &index) const
 414 {
 415     if(index.parent().isValid()) // it's event, not time-group
 416         return 0;
 417
 418     int nrofAlarms = 0;
 419     for(int i=0; i<index.model()->rowCount(index); i++)
 420         if(static_cast<Event*>(index.child(i,0).internalPointer())->hasAlarm())
 421             nrofAlarms++;
 422
 423     return nrofAlarms;
 424 }
 425