src/mvc/delegate.cpp

   1 /*
   2  * Copyright (C) 2010 Ixonos Plc.
   3  * Copyright (C) 2011-2021 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 <QDebug>
  21 #include <QPainter>
  22
  23 #include "delegate.h"
  24 #include "eventmodel.h"
  25 #include "track.h"
  26 #include "conference.h"
  27 #include "room.h"
  28 #include "application.h"
  29
  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
  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         Conference& conference = ((Application*) qApp)->activeConference();
 153         QTime start = conference.shiftTime(event->start().time());
 154         painter->setFont(fontBig);
 155         painter->drawText(titlePointF, start.toString("hh:mm") + "-" + start.addSecs(event->duration()).toString("hh:mm") + ", " + event->roomName());
 156
 157         // title
 158         titlePointF.setY(titlePointF.y() + fmBig.lineSpacing());
 159         painter->setFont(fontBigB);
 160         QString title = event->title();
 161         if(fmBigB.boundingRect(title).width() > (option.rect.width()-2*SPACER)) // the title won't fit the screen
 162         {
 163             // chop words from the end
 164             while( (fmBigB.boundingRect(title + "...").width() > (option.rect.width()-2*SPACER)) && !title.isEmpty())
 165             {
 166                 title.chop(1);
 167                 // chop characters one-by-one from the end
 168                 while( (!title.at(title.length()-1).isSpace()) && !title.isEmpty())
 169                 {
 170                     title.chop(1);
 171                 }
 172             }
 173             title += "...";
 174         }
 175         painter->drawText(titlePointF, title);
 176
 177         // persons
 178         titlePointF.setY(titlePointF.y() + fmBigB.descent() + fmSmall.lineSpacing());
 179         painter->setFont(fontSmall);
 180         QString presenterPrefix = event->persons().count() < 2 ? "Presenter" : "Presenters";
 181         painter->drawText(titlePointF, presenterPrefix + ": " + event->persons().join(" and "));
 182
 183         // track
 184         titlePointF.setY(titlePointF.y() + fmSmall.lineSpacing());
 185         painter->drawText(titlePointF, "Track: " + Track::retrieveTrackName(event->trackId()));
 186     }
 187
 188     else // doesn't have parent - time-groups' elements (top items)
 189     {
 190         int numFav = numberOfFavourites(index);
 191         int numAlarm = numberOfAlarms(index);
 192
 193         QStyleOptionButton styleOptionButton;
 194         styleOptionButton.rect = option.rect;
 195         if (isExpanded(index)) styleOptionButton.state = QStyle::State_Sunken;
 196         // styleOptionButton.text = qVariantValue<QString>(index.data());
 197         qApp->style()->drawPrimitive(QStyle::PE_PanelButtonCommand, &styleOptionButton, painter, mViewPtr);
 198         // qApp->style()->drawControl(QStyle::CE_PushButtonLabel, &styleOptionButton, painter, mViewPtr);
 199         // qApp->style()->drawPrimitive(QStyle::PE_IndicatorArrowDown, &styleOptionButton, painter, mViewPtr);
 200
 201         QFont fontSmall = option.font;
 202         fontSmall.setBold(true);
 203         fontSmall.setPixelSize(option.rect.height()*scaleFactor1);
 204         QFontMetrics fmSmall(fontSmall);
 205
 206         QFont fontBig = option.font;
 207         fontBig.setBold(true);
 208         fontBig.setPixelSize(option.rect.height()*scaleFactor2);
 209         QFontMetrics fmBig(fontBig);
 210
 211         int spacer = (fmSmall.boundingRect("999").width() < SPACER) ? SPACER : fmSmall.boundingRect("999").width();
 212
 213         // draw icons
 214         painter->setPen(QPen(textColor));
 215         painter->setFont(fontSmall);
 216         QImage *image = mControls[numFav ? FavouriteControlStrong : FavouriteControlNo]->image();
 217         QPoint drawPoint =
 218             option.rect.topRight()
 219             - QPoint(
 220                     spacer + image->width(),
 221                     - option.rect.height()/2 + image->height()/2);
 222         painter->drawImage(drawPoint,*image);
 223         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 224                 QString::number(numFav));
 225
 226         drawPoint.setX(drawPoint.x() - spacer - image->width());
 227         image = mControls[numAlarm ? AlarmControlOn : AlarmControlOff]->image();
 228         painter->drawImage(drawPoint,*image);
 229         painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
 230                 QString::number(numAlarm));
 231
 232         // draw texts
 233         QString numEvents = QString::number(index.model()->rowCount(index)).append("/");
 234         drawPoint.setX(drawPoint.x() - spacer - fmSmall.boundingRect(numEvents).width());
 235         drawPoint.setY(drawPoint.y()+image->height() - 2);
 236         painter->drawText(drawPoint,numEvents);
 237
 238         QPointF titlePointF = QPoint(
 239                 option.rect.x()+SPACER,
 240                 option.rect.y()+option.rect.height()-fmBig.descent());
 241         painter->setFont(fontBig);
 242         painter->drawText(titlePointF,index.data().value<QString>());
 243     }
 244
 245     painter->restore();
 246 }
 247
 248 QSize Delegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
 249 {
 250     Q_UNUSED(option)
 251
 252     if (index.internalId() == 0) // time group
 253     {
 254         return QSize(40,40);
 255     }
 256     else // event
 257     {
 258         return QSize(100,100);
 259     }
 260 }
 261
 262 bool Delegate::hasParent( const QModelIndex &index ) const
 263 {
 264     if( index.parent().isValid() )
 265         return true;
 266     else
 267         return false;
 268 }
 269
 270 bool Delegate::isLast( const QModelIndex &index ) const
 271 {
 272     if(!hasParent(index))
 273         return false; // what should be returned here?
 274
 275     if(index.row() >= (index.model()->rowCount(index.parent())-1))
 276         return true;
 277     else
 278         return false;
 279 }
 280
 281 bool Delegate::isExpanded( const QModelIndex &index ) const
 282 {
 283     if( !mViewPtr )
 284         return false;
 285     else
 286         return mViewPtr->isExpanded( index );
 287 }
 288
 289 Delegate::ControlId Delegate::whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const
 290 {
 291     if(!hasParent(aIndex)) // time-group item (root item)
 292         return ControlNone;
 293
 294     QListIterator<ControlId> i(mControls.keys());
 295     while (i.hasNext())
 296     {
 297         ControlId id = i.next();
 298         Control *control = mControls[id];
 299         if (control->enabled()
 300             and control->drawRect(static_cast<QTreeView*>(parent())->visualRect(aIndex)).contains(aPoint))
 301         {
 302             return id;
 303         }
 304     }
 305
 306     return ControlNone;
 307 }
 308
 309 Delegate::Control::Control(ControlId aControlId, const QString &aImageName, const Control* prev_control)
 310     : mId(aControlId)
 311     , mImage(new QImage(aImageName))
 312     , mDrawPoint(QPoint(0,0))
 313     , mEnabled(false)
 314 {
 315     QPoint p;
 316     if (prev_control == NULL) {
 317         p = QPoint(0, SPACER);
 318     } else {
 319         p = prev_control->drawPoint();
 320     }
 321     p.setX(p.x()-image()->width()-SPACER);
 322     setDrawPoint(p);
 323 }
 324
 325 void Delegate::Control::paint(QPainter* painter, const QRect rect)
 326 {
 327     painter->drawImage(drawPoint(rect),*image());
 328     setEnabled(true);
 329 }
 330
 331 void Delegate::defineControls()
 332 {
 333     // FAVOURITE ICONs
 334     // strong
 335     mControls.insert(FavouriteControlStrong, new Control(FavouriteControlStrong, QString(":icons/favourite-strong.png"), NULL));
 336     // weak
 337     mControls.insert(FavouriteControlWeak, new Control(FavouriteControlWeak, QString(":icons/favourite-weak.png"), NULL));
 338     // no
 339     mControls.insert(FavouriteControlNo, new Control(FavouriteControlNo, QString(":icons/favourite-no.png"), NULL));
 340
 341     // ALARM ICONs
 342     // on
 343     mControls.insert(AlarmControlOn,
 344                     new Control(AlarmControlOn, QString(":icons/alarm-on.png"), mControls[FavouriteControlStrong]));
 345     // off
 346     mControls.insert(AlarmControlOff,
 347                     new Control(AlarmControlOff, QString(":icons/alarm-off.png"), mControls[FavouriteControlNo]));
 348     // WARNING ICON
 349     mControls.insert(WarningControl,
 350                     new Control(WarningControl, QString(":icons/dialog-warning.png"), mControls[AlarmControlOff]));
 351         }
 352
 353 bool Delegate::isPointFromRect(const QPoint &aPoint, const QRect &aRect) const
 354 {
 355     if( (aPoint.x()>=aRect.left() && aPoint.x()<=aRect.right()) && (aPoint.y()>=aRect.top() && aPoint.y()<=aRect.bottom()) )
 356         return true;
 357
 358     return false;
 359 }
 360
 361 int Delegate::numberOfFavourites(const QModelIndex &index) const
 362 {
 363     if(index.parent().isValid()) // it's event, not time-group
 364         return 0;
 365
 366     int nrofFavs = 0;
 367     for(int i=0; i<index.model()->rowCount(index); i++)
 368         if(static_cast<Event*>(index.model()->index(i, 0, index).internalPointer())->favourite() != Favourite_no)
 369             nrofFavs++;
 370
 371     return nrofFavs;
 372 }
 373
 374 int Delegate::numberOfAlarms(const QModelIndex &index) const
 375 {
 376     if(index.parent().isValid()) // it's event, not time-group
 377         return 0;
 378
 379     int nrofAlarms = 0;
 380     for(int i=0; i<index.model()->rowCount(index); i++)
 381         if(static_cast<Event*>(index.model()->index(i, 0, index).internalPointer())->hasAlarm())
 382             nrofAlarms++;
 383
 384     return nrofAlarms;
 385 }
 386