bump version after release.
[toast/confclerk.git] / 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