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 = csNone;
  68         switch (event->favourite()) {
  69             case Favourite_strong:
  70                 conflictSeverity = (eventTimeConflict == Favourite_strong) ? csStrong : csNone;
  71                 break;
  72             case Favourite_weak:
  73                 conflictSeverity = (eventTimeConflict == Favourite_no) ? csNone : csWeak;
  74                 break;
  75             case Favourite_no:
  76                 conflictSeverity = csNone;
  77                 break;
  78         }
  79
  80         // entry horizontal layout:
  81         // * spacer (aka y position of image)
  82         // * image
  83         // * rest is text, which is 1 line of title with big letters and 2 lines of Presenter and Track
  84         int aux = option.rect.height() - SPACER - mControls[FavouriteControlStrong]->image()->height();
  85
  86         // font SMALL
  87         QFont fontSmall = option.font;
  88         fontSmall.setBold(false);
  89         fontSmall.setPixelSize(aux*0.2);
  90         QFontMetrics fmSmall(fontSmall);
  91         // font SMALL bold
  92         QFont fontSmallB = fontSmall;
  93         fontSmallB.setBold(true);
  94
  95         // font BIG
  96         QFont fontBig = option.font;
  97         fontBig.setBold(false);
  98         fontBig.setPixelSize(aux*0.33);
  99         QFontMetrics fmBig(fontBig);
 100
 101         // font BIG bold
 102         QFont fontBigB = fontBig;
 103         fontBigB.setBold(true);
 104         QFontMetrics fmBigB(fontBigB);
 105
 106         // background (in case of time conflicts)
 107         if (conflictSeverity != csNone) {
 108             painter->setBrush(conflictSeverity == csStrong ? Qt::yellow : QColor("lightyellow"));
 109             painter->setPen(Qt::NoPen);
 110             painter->drawRect(option.rect);
 111         }
 112
 113         // background (without time conflicts)
 114         else {
 115             QStyleOption styleOption;
 116             styleOption.rect = option.rect;
 117             qApp->style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &styleOption, painter, mViewPtr);
 118         }
 119
 120         // draw Controls
 121         foreach(Control* c, mControls.values()) {
 122             c->setEnabled(false);
 123         }
 124         switch (event->favourite()) {
 125         case Favourite_strong:
 126             mControls[FavouriteControlStrong]->paint(painter, option.rect);
 127             break;
 128         case Favourite_weak:
 129             mControls[FavouriteControlWeak]->paint(painter, option.rect);
 130             break;
 131         case Favourite_no:
 132             mControls[FavouriteControlNo]->paint(painter, option.rect);
 133             break;
 134         }
 135
 136         if(event->hasAlarm())
 137             mControls[AlarmControlOn]->paint(painter, option.rect);
 138         else
 139             mControls[AlarmControlOff]->paint(painter, option.rect);
 140
 141         if(eventTimeConflict != Favourite_no)
 142             mControls[WarningControl]->paint(painter, option.rect);
 143
 144         // draw texts
 145         // it starts just below the image
 146         // ("position of text" is lower-left angle of the first letter,
 147         //  so the first line is actually at the same height as the image)
 148         painter->setPen(QPen(conflictSeverity != csNone ? Qt::black : textColor));
 149         QPointF titlePointF(option.rect.x() + SPACER,
 150                             option.rect.y() + SPACER + mControls[FavouriteControlStrong]->image()->height());
 151         QTime start = event->start().time();
 152         painter->setFont(fontBig);
 153         painter->drawText(titlePointF,start.toString("hh:mm") + "-" + start.addSecs(event->duration()).toString("hh:mm") + ", " + event->roomName());
 154
 155         // title
 156         titlePointF.setY(titlePointF.y()+fmBig.height()-fmBig.descent());
 157         painter->setFont(fontBigB);
 158         QString title = event->title();
 159         if(fmBigB.boundingRect(title).width() > (option.rect.width()-2*SPACER)) // the title won't fit the screen
 160         {
 161             // chop words from the end
 162             while( (fmBigB.boundingRect(title + "...").width() > (option.rect.width()-2*SPACER)) && !title.isEmpty())
 163             {
 164                 title.chop(1);
 165                 // chop characters one-by-one from the end
 166                 while( (!title.at(title.length()-1).isSpace()) && !title.isEmpty())
 167                 {
 168                     title.chop(1);
 169                 }
 170             }
 171             title += "...";
 172         }
 173         painter->drawText(titlePointF,title);
 174
 175         // persons
 176         titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
 177         painter->setFont(fontSmall);
 178         QString presenterPrefix = event->persons().count() < 2 ? "Presenter" : "Presenters";
 179         painter->drawText(titlePointF,presenterPrefix + ": " + event->persons().join(" and "));
 180
 181         // track
 182         titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
 183         painter->drawText(titlePointF,"Track: " + Track::retrieveTrackName(event->trackId()));
 184     }
 185
 186     else // doesn't have parent - time-groups' elements (top items)
 187     {
 188         int numFav = numberOfFavourities(index);
 189         int numAlarm = numberOfAlarms(index);
 190
 191         QStyleOptionButton styleOptionButton;
 192         styleOptionButton.rect = option.rect;
 193         if (isExpanded(index)) styleOptionButton.state = QStyle::State_Sunken;
 194         // styleOptionButton.text = qVariantValue<QString>(index.data());
 195         qApp->style()->drawPrimitive(QStyle::PE_PanelButtonCommand, &styleOptionButton, painter, mViewPtr);
 196         // qApp->style()->drawControl(QStyle::CE_PushButtonLabel, &styleOptionButton, painter, mViewPtr);
 197         // qApp->style()->drawPrimitive(QStyle::PE_IndicatorArrowDown, &styleOptionButton, painter, mViewPtr);
 198
 199         QFont fontSmall = option.font;
 200         fontSmall.setBold(true);
 201         fontSmall.setPixelSize(option.rect.height()*scaleFactor1);
 202         QFontMetrics fmSmall(fontSmall);
 203
 204         QFont fontBig = option.font;
 205         fontBig.setBold(true);
 206         fontBig.setPixelSize(option.rect.height()*scaleFactor2);
 207         QFontMetrics fmBig(fontBig);
 208
 209         int spacer = (fmSmall.boundingRect("999").width() < SPACER) ? SPACER : fmSmall.boundingRect("999").width();
 210
 211         // draw icons
 212         painter->setPen(QPen(textColor));
 213         painter->setFont(fontSmall);
 214         QImage *image = mControls[numFav ? FavouriteControlStrong : FavouriteControlNo]->image();
 215         QPoint drawPoint =
 216             option.rect.topRight()
 217             - QPoint(
 218                     spacer + image->width(),
 219                     - option.rect.height()/2 + image->height()/2);
 220         painter->drawImage(drawPoint,*image);
 221         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 222                 QString::number(numFav));
 223
 224         drawPoint.setX(drawPoint.x() - spacer - image->width());
 225         image = mControls[numAlarm ? AlarmControlOn : AlarmControlOff]->image();
 226         painter->drawImage(drawPoint,*image);
 227         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 228                 QString::number(numAlarm));
 229
 230         // draw texts
 231         QString numEvents = QString::number(index.model()->rowCount(index)).append("/");
 232         drawPoint.setX(drawPoint.x() - spacer - fmSmall.boundingRect(numEvents).width());
 233         drawPoint.setY(drawPoint.y()+image->height() - 2);
 234         painter->drawText(drawPoint,numEvents);
 235
 236         QPointF titlePointF = QPoint(
 237                 option.rect.x()+SPACER,
 238                 option.rect.y()+option.rect.height()-fmBig.descent());
 239         painter->setFont(fontBig);
 240         painter->drawText(titlePointF,index.data().value<QString>());
 241     }
 242
 243     painter->restore();
 244 }
 245
 246 QSize Delegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 247 {
 248     Q_UNUSED(option)
 249
 250     if (index.internalId() == 0) // time group
 251     {
 252         return QSize(40,40);
 253     }
 254     else // event
 255     {
 256         return QSize(100,100);
 257     }
 258 }
 259
 260 bool Delegate::hasParent( const QModelIndex &index ) const
 261 {
 262     if( index.parent().isValid() )
 263         return true;
 264     else
 265         return false;
 266 }
 267
 268 bool Delegate::isLast( const QModelIndex &index ) const
 269 {
 270     if(!hasParent(index))
 271         return false; // what should be returned here?
 272
 273     if(index.row() >= (index.model()->rowCount(index.parent())-1))
 274         return true;
 275     else
 276         return false;
 277 }
 278
 279 bool Delegate::isExpanded( const QModelIndex &index ) const
 280 {
 281     if( !mViewPtr )
 282         return false;
 283     else
 284         return mViewPtr->isExpanded( index );
 285 }
 286
 287 Delegate::ControlId Delegate::whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const
 288 {
 289     if(!hasParent(aIndex)) // time-group item (root item)
 290         return ControlNone;
 291
 292     QListIterator<ControlId> i(mControls.keys());
 293     while (i.hasNext())
 294     {
 295         ControlId id = i.next();
 296         Control *control = mControls[id];
 297         if (control->enabled()
 298             and control->drawRect(static_cast<QTreeView*>(parent())->visualRect(aIndex)).contains(aPoint))
 299         {
 300             return id;
 301         }
 302     }
 303
 304     return ControlNone;
 305 }
 306
 307 Delegate::Control::Control(ControlId aControlId, const QString &aImageName, const Control* prev_control)
 308     : mId(aControlId)
 309     , mImage(new QImage(aImageName))
 310     , mDrawPoint(QPoint(0,0))
 311     , mEnabled(false)
 312 {
 313     QPoint p;
 314     if (prev_control == NULL) {
 315         p = QPoint(0, SPACER);
 316     } else {
 317         p = prev_control->drawPoint();
 318     }
 319     p.setX(p.x()-image()->width()-SPACER);
 320     setDrawPoint(p);
 321 }
 322
 323 void Delegate::Control::paint(QPainter* painter, const QRect rect)
 324 {
 325     painter->drawImage(drawPoint(rect),*image());
 326     setEnabled(true);
 327 }
 328
 329 void Delegate::defineControls()
 330 {
 331     // FAVOURITE ICONs
 332     // strong
 333     mControls.insert(FavouriteControlStrong, new Control(FavouriteControlStrong, QString(":icons/favourite-strong.png"), NULL));
 334     // weak
 335     mControls.insert(FavouriteControlWeak, new Control(FavouriteControlWeak, QString(":icons/favourite-weak.png"), NULL));
 336     // no
 337     mControls.insert(FavouriteControlNo, new Control(FavouriteControlNo, QString(":icons/favourite-no.png"), NULL));
 338
 339     // ALARM ICONs
 340     // on
 341     mControls.insert(AlarmControlOn,
 342                     new Control(AlarmControlOn, QString(":icons/alarm-on.png"), mControls[FavouriteControlStrong]));
 343     // off
 344     mControls.insert(AlarmControlOff,
 345                     new Control(AlarmControlOff, QString(":icons/alarm-off.png"), mControls[FavouriteControlNo]));
 346     // WARNING ICON
 347     mControls.insert(WarningControl,
 348                     new Control(WarningControl, QString(":icons/dialog-warning.png"), mControls[AlarmControlOff]));
 349         }
 350
 351 bool Delegate::isPointFromRect(const QPoint &aPoint, const QRect &aRect) const
 352 {
 353     if( (aPoint.x()>=aRect.left() && aPoint.x()<=aRect.right()) && (aPoint.y()>=aRect.top() && aPoint.y()<=aRect.bottom()) )
 354         return true;
 355
 356     return false;
 357 }
 358
 359 int Delegate::numberOfFavourities(const QModelIndex &index) const
 360 {
 361     if(index.parent().isValid()) // it's event, not time-group
 362         return 0;
 363
 364     int nrofFavs = 0;
 365     for(int i=0; i<index.model()->rowCount(index); i++)
 366         if(static_cast<Event*>(index.child(i,0).internalPointer())->favourite() != Favourite_no)
 367             nrofFavs++;
 368
 369     return nrofFavs;
 370 }
 371
 372 int Delegate::numberOfAlarms(const QModelIndex &index) const
 373 {
 374     if(index.parent().isValid()) // it's event, not time-group
 375         return 0;
 376
 377     int nrofAlarms = 0;
 378     for(int i=0; i<index.model()->rowCount(index); i++)
 379         if(static_cast<Event*>(index.child(i,0).internalPointer())->hasAlarm())
 380             nrofAlarms++;
 381
 382     return nrofAlarms;
 383 }
 384