src/mvc/delegate.cpp

   1 /*
   2  * Copyright (C) 2010 Ixonos Plc.
   3  * Copyright (C) 2011-2017 Philipp Spitzer, gregor herrmann, Stefan Stahl
   4  *
   5  * This file is part of ConfClerk.
   6  *
   7  * ConfClerk is free software: you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation, either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * ConfClerk is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * ConfClerk.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20 #include "delegate.h"
  21 #include "eventmodel.h"
  22 #include "track.h"
  23
  24 #include <QDebug>
  25 #include <QPainter>
  26
  27 #include "room.h"
  28
  29 const int RADIUS = 10;
  30 const int SPACER = 10;
  31
  32 const double scaleFactor1 = 0.4;
  33 const double scaleFactor2 = 0.8;
  34
  35 Delegate::Delegate(QTreeView *aParent)
  36     : QItemDelegate(aParent)
  37     , mViewPtr(aParent)
  38 {
  39     mControls.clear();
  40     defineControls();
  41 }
  42
  43 Delegate::~Delegate()
  44 {
  45     QListIterator<ControlId> i(mControls.keys());
  46     while (i.hasNext())
  47     {
  48         delete mControls[i.next()]->image();
  49     }
  50 }
  51
  52 void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
  53 {
  54     if (!mViewPtr)
  55         return;
  56
  57     painter->save();
  58
  59     QColor textColor = option.palette.color(QPalette::Text);
  60
  61     if(hasParent(index))
  62     {
  63         Event *event = static_cast<Event*>(index.internalPointer());
  64
  65         // determine severity of conflict
  66         Favourite eventTimeConflict = event->timeConflict(); // cache value as event->timeConflict is expensive
  67         enum ConflictSeverity {csNone, csWeak, csStrong} conflictSeverity;
  68         conflictSeverity = csNone;
  69         switch (event->favourite()) {
  70             case Favourite_strong:
  71                 conflictSeverity = (eventTimeConflict == Favourite_strong) ? csStrong : csNone;
  72                 break;
  73             case Favourite_weak:
  74                 conflictSeverity = (eventTimeConflict == Favourite_no) ? csNone : csWeak;
  75                 break;
  76             case Favourite_no:
  77                 conflictSeverity = csNone;
  78                 break;
  79         }
  80
  81         // entry horizontal layout:
  82         // * spacer (aka y position of image)
  83         // * image
  84         // * rest is text, which is 1 line of title with big letters and 2 lines of Presenter and Track
  85         int aux = option.rect.height() - SPACER - mControls[FavouriteControlStrong]->image()->height();
  86
  87         // font SMALL
  88         QFont fontSmall = option.font;
  89         fontSmall.setBold(false);
  90         fontSmall.setPixelSize(aux*0.2);
  91         QFontMetrics fmSmall(fontSmall);
  92         // font SMALL bold
  93         QFont fontSmallB = fontSmall;
  94         fontSmallB.setBold(true);
  95
  96         // font BIG
  97         QFont fontBig = option.font;
  98         fontBig.setBold(false);
  99         fontBig.setPixelSize(aux*0.33);
 100         QFontMetrics fmBig(fontBig);
 101
 102         // font BIG bold
 103         QFont fontBigB = fontBig;
 104         fontBigB.setBold(true);
 105         QFontMetrics fmBigB(fontBigB);
 106
 107         // background (in case of time conflicts)
 108         if (conflictSeverity != csNone) {
 109             painter->setBrush(conflictSeverity == csStrong ? Qt::yellow : QColor("lightyellow"));
 110             painter->setPen(Qt::NoPen);
 111             painter->drawRect(option.rect);
 112         }
 113
 114         // background (without time conflicts)
 115         else {
 116             QStyleOption styleOption;
 117             styleOption.rect = option.rect;
 118             qApp->style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &styleOption, painter, mViewPtr);
 119         }
 120
 121         // draw Controls
 122         foreach(Control* c, mControls.values()) {
 123             c->setEnabled(false);
 124         }
 125         switch (event->favourite()) {
 126         case Favourite_strong:
 127             mControls[FavouriteControlStrong]->paint(painter, option.rect);
 128             break;
 129         case Favourite_weak:
 130             mControls[FavouriteControlWeak]->paint(painter, option.rect);
 131             break;
 132         case Favourite_no:
 133             mControls[FavouriteControlNo]->paint(painter, option.rect);
 134             break;
 135         }
 136
 137         if(event->hasAlarm())
 138             mControls[AlarmControlOn]->paint(painter, option.rect);
 139         else
 140             mControls[AlarmControlOff]->paint(painter, option.rect);
 141
 142         if(eventTimeConflict != Favourite_no)
 143             mControls[WarningControl]->paint(painter, option.rect);
 144
 145         // draw texts
 146         // it starts just below the image
 147         // ("position of text" is lower-left angle of the first letter,
 148         //  so the first line is actually at the same height as the image)
 149         painter->setPen(QPen(conflictSeverity != csNone ? Qt::black : textColor));
 150         QPointF titlePointF(option.rect.x() + SPACER,
 151                             option.rect.y() + SPACER + mControls[FavouriteControlStrong]->image()->height());
 152         QTime start = event->start().time();
 153         painter->setFont(fontBig);
 154         painter->drawText(titlePointF,start.toString("hh:mm") + "-" + start.addSecs(event->duration()).toString("hh:mm") + ", " + event->roomName());
 155
 156         // title
 157         titlePointF.setY(titlePointF.y()+fmBig.height()-fmBig.descent());
 158         painter->setFont(fontBigB);
 159         QString title = event->title();
 160         if(fmBigB.boundingRect(title).width() > (option.rect.width()-2*SPACER)) // the title won't fit the screen
 161         {
 162             // chop words from the end
 163             while( (fmBigB.boundingRect(title + "...").width() > (option.rect.width()-2*SPACER)) && !title.isEmpty())
 164             {
 165                 title.chop(1);
 166                 // chop characters one-by-one from the end
 167                 while( (!title.at(title.length()-1).isSpace()) && !title.isEmpty())
 168                 {
 169                     title.chop(1);
 170                 }
 171             }
 172             title += "...";
 173         }
 174         painter->drawText(titlePointF,title);
 175
 176         // persons
 177         titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
 178         painter->setFont(fontSmall);
 179         QString presenterPrefix = event->persons().count() < 2 ? "Presenter" : "Presenters";
 180         painter->drawText(titlePointF,presenterPrefix + ": " + event->persons().join(" and "));
 181
 182         // track
 183         titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
 184         painter->drawText(titlePointF,"Track: " + Track::retrieveTrackName(event->trackId()));
 185     }
 186
 187     else // doesn't have parent - time-groups' elements (top items)
 188     {
 189         int numFav = numberOfFavourities(index);
 190         int numAlarm = numberOfAlarms(index);
 191
 192         QStyleOptionButton styleOptionButton;
 193         styleOptionButton.rect = option.rect;
 194         if (isExpanded(index)) styleOptionButton.state = QStyle::State_Sunken;
 195         // styleOptionButton.text = qVariantValue<QString>(index.data());
 196         qApp->style()->drawPrimitive(QStyle::PE_PanelButtonCommand, &styleOptionButton, painter, mViewPtr);
 197         // qApp->style()->drawControl(QStyle::CE_PushButtonLabel, &styleOptionButton, painter, mViewPtr);
 198         // qApp->style()->drawPrimitive(QStyle::PE_IndicatorArrowDown, &styleOptionButton, painter, mViewPtr);
 199
 200         QFont fontSmall = option.font;
 201         fontSmall.setBold(true);
 202         fontSmall.setPixelSize(option.rect.height()*scaleFactor1);
 203         QFontMetrics fmSmall(fontSmall);
 204
 205         QFont fontBig = option.font;
 206         fontBig.setBold(true);
 207         fontBig.setPixelSize(option.rect.height()*scaleFactor2);
 208         QFontMetrics fmBig(fontBig);
 209
 210         int spacer = (fmSmall.boundingRect("999").width() < SPACER) ? SPACER : fmSmall.boundingRect("999").width();
 211
 212         // draw icons
 213         painter->setPen(QPen(textColor));
 214         painter->setFont(fontSmall);
 215         QImage *image = mControls[numFav ? FavouriteControlStrong : FavouriteControlNo]->image();
 216         QPoint drawPoint =
 217             option.rect.topRight()
 218             - QPoint(
 219                     spacer + image->width(),
 220                     - option.rect.height()/2 + image->height()/2);
 221         painter->drawImage(drawPoint,*image);
 222         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 223                 QString::number(numFav));
 224
 225         drawPoint.setX(drawPoint.x() - spacer - image->width());
 226         image = mControls[numAlarm ? AlarmControlOn : AlarmControlOff]->image();
 227         painter->drawImage(drawPoint,*image);
 228         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 229                 QString::number(numAlarm));
 230
 231         // draw texts
 232         QString numEvents = QString::number(index.model()->rowCount(index)).append("/");
 233         drawPoint.setX(drawPoint.x() - spacer - fmSmall.boundingRect(numEvents).width());
 234         drawPoint.setY(drawPoint.y()+image->height() - 2);
 235         painter->drawText(drawPoint,numEvents);
 236
 237         QPointF titlePointF = QPoint(
 238                 option.rect.x()+SPACER,
 239                 option.rect.y()+option.rect.height()-fmBig.descent());
 240         painter->setFont(fontBig);
 241         painter->drawText(titlePointF,qVariantValue<QString>(index.data()));
 242     }
 243
 244     painter->restore();
 245 }
 246
 247 QSize Delegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 248 {
 249     Q_UNUSED(option)
 250
 251     if (index.internalId() == 0) // time group
 252     {
 253         return QSize(40,40);
 254     }
 255     else // event
 256     {
 257         return QSize(100,100);
 258     }
 259 }
 260
 261 bool Delegate::hasParent( const QModelIndex &index ) const
 262 {
 263     if( index.parent().isValid() )
 264         return true;
 265     else
 266         return false;
 267 }
 268
 269 bool Delegate::isLast( const QModelIndex &index ) const
 270 {
 271     if(!hasParent(index))
 272         return false; // what should be returned here?
 273
 274     if(index.row() >= (index.model()->rowCount(index.parent())-1))
 275         return true;
 276     else
 277         return false;
 278 }
 279
 280 bool Delegate::isExpanded( const QModelIndex &index ) const
 281 {
 282     if( !mViewPtr )
 283         return false;
 284     else
 285         return mViewPtr->isExpanded( index );
 286 }
 287
 288 Delegate::ControlId Delegate::whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const
 289 {
 290     if(!hasParent(aIndex)) // time-group item (root item)
 291         return ControlNone;
 292
 293     QListIterator<ControlId> i(mControls.keys());
 294     while (i.hasNext())
 295     {
 296         ControlId id = i.next();
 297         Control *control = mControls[id];
 298         if (control->enabled()
 299             and control->drawRect(static_cast<QTreeView*>(parent())->visualRect(aIndex)).contains(aPoint))
 300         {
 301             return id;
 302         }
 303     }
 304
 305     return ControlNone;
 306 }
 307
 308 Delegate::Control::Control(ControlId aControlId, const QString &aImageName, const Control* prev_control)
 309     : mId(aControlId)
 310     , mImage(new QImage(aImageName))
 311     , mDrawPoint(QPoint(0,0))
 312     , mEnabled(false)
 313 {
 314     QPoint p;
 315     if (prev_control == NULL) {
 316         p = QPoint(0, SPACER);
 317     } else {
 318         p = prev_control->drawPoint();
 319     }
 320     p.setX(p.x()-image()->width()-SPACER);
 321     setDrawPoint(p);
 322 }
 323
 324 void Delegate::Control::paint(QPainter* painter, const QRect rect)
 325 {
 326     painter->drawImage(drawPoint(rect),*image());
 327     setEnabled(true);
 328 }
 329
 330 void Delegate::defineControls()
 331 {
 332     // FAVOURITE ICONs
 333     // strong
 334     mControls.insert(FavouriteControlStrong, new Control(FavouriteControlStrong, QString(":icons/favourite-strong.png"), NULL));
 335     // weak
 336     mControls.insert(FavouriteControlWeak, new Control(FavouriteControlWeak, QString(":icons/favourite-weak.png"), NULL));
 337     // no
 338     mControls.insert(FavouriteControlNo, new Control(FavouriteControlNo, QString(":icons/favourite-no.png"), NULL));
 339
 340     // ALARM ICONs
 341     // on
 342     mControls.insert(AlarmControlOn,
 343                     new Control(AlarmControlOn, QString(":icons/alarm-on.png"), mControls[FavouriteControlStrong]));
 344     // off
 345     mControls.insert(AlarmControlOff,
 346                     new Control(AlarmControlOff, QString(":icons/alarm-off.png"), mControls[FavouriteControlNo]));
 347     // WARNING ICON
 348     mControls.insert(WarningControl,
 349                     new Control(WarningControl, QString(":icons/dialog-warning.png"), mControls[AlarmControlOff]));
 350         }
 351
 352 bool Delegate::isPointFromRect(const QPoint &aPoint, const QRect &aRect) const
 353 {
 354     if( (aPoint.x()>=aRect.left() && aPoint.x()<=aRect.right()) && (aPoint.y()>=aRect.top() && aPoint.y()<=aRect.bottom()) )
 355         return true;
 356
 357     return false;
 358 }
 359
 360 int Delegate::numberOfFavourities(const QModelIndex &index) const
 361 {
 362     if(index.parent().isValid()) // it's event, not time-group
 363         return 0;
 364
 365     int nrofFavs = 0;
 366     for(int i=0; i<index.model()->rowCount(index); i++)
 367         if(static_cast<Event*>(index.child(i,0).internalPointer())->favourite() != Favourite_no)
 368             nrofFavs++;
 369
 370     return nrofFavs;
 371 }
 372
 373 int Delegate::numberOfAlarms(const QModelIndex &index) const
 374 {
 375     if(index.parent().isValid()) // it's event, not time-group
 376         return 0;
 377
 378     int nrofAlarms = 0;
 379     for(int i=0; i<index.model()->rowCount(index); i++)
 380         if(static_cast<Event*>(index.child(i,0).internalPointer())->hasAlarm())
 381             nrofAlarms++;
 382
 383     return nrofAlarms;
 384 }
 385