source: src/mvc/delegate.cpp @ 525448c

qt5
Last change on this file since 525448c was 525448c, checked in by kirilma <kirilma@…>, 12 years ago

refactor: more compact drawing of controls
  • Property mode set to 100644
File size: 14.8 KB
Line 
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
28const int RADIUS = 10;
29const int SPACER = 10;
30
31const double scaleFactor1 = 0.4;
32const double scaleFactor2 = 0.8;
33
34Delegate::Delegate(QTreeView *aParent)
35    : QItemDelegate(aParent)
36    , mViewPtr(aParent)
37{
38    mControls.clear();
39    defineControls();
40}
41
42Delegate::~Delegate()
43{
44    QListIterator<ControlId> i(mControls.keys());
45    while (i.hasNext())
46    {
47        delete mControls[i.next()]->image();
48    }
49}
50
51void 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        if(event->isFavourite())
139            mControls[FavouriteControlOn]->paint(painter, option.rect);
140        else
141            mControls[FavouriteControlOff]->paint(painter, option.rect);
142#ifdef MAEMO
143        if(event->hasAlarm())
144            mControls[AlarmControlOn]->paint(painter, option.rect);
145        else
146            mControls[AlarmControlOff]->paint(painter, option.rect);
147#endif
148        if (event->room()->hasMap())
149            mControls[MapControl]->paint(painter, option.rect);
150        if(event->hasTimeConflict())
151            mControls[WarningControl]->paint(painter, option.rect);
152
153        // draw texts
154        // it starts just below the image
155        // ("position of text" is lower-left angle of the first letter,
156        //  so the first line is actually at the same height as the image)
157        QPointF titlePointF(option.rect.x() + SPACER,
158                            option.rect.y() + SPACER + mControls[FavouriteControlOn]->image()->height());
159        QTime start = event->start().time();
160        painter->setFont(fontBig);
161        painter->drawText(titlePointF,start.toString("hh:mm") + "-" + start.addSecs(event->duration()).toString("hh:mm") + ", " + event->roomName());
162        // title
163        titlePointF.setY(titlePointF.y()+fmBig.height()-fmBig.descent());
164        painter->setFont(fontBigB);
165        QString title = event->title();
166        if(fmBigB.boundingRect(title).width() > (option.rect.width()-2*SPACER)) // the title won't fit the screen
167        {
168            // chop words from the end
169            while( (fmBigB.boundingRect(title + "...").width() > (option.rect.width()-2*SPACER)) && !title.isEmpty())
170            {
171                title.chop(1);
172                // chop characters one-by-one from the end
173                while( (!title.at(title.length()-1).isSpace()) && !title.isEmpty())
174                {
175                    title.chop(1);
176                }
177            }
178            title += "...";
179        }
180        painter->drawText(titlePointF,title);
181        // persons
182        titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
183        painter->setFont(fontSmall);
184        painter->drawText(titlePointF,"Presenter(s): " + event->persons().join(" and "));
185        // track
186        titlePointF.setY(titlePointF.y()+fmSmall.height()-fmSmall.descent());
187        painter->drawText(titlePointF,"Track: " + Track::retrieveTrackName(event->trackId()));
188    }
189    else // doesn't have parent - time-groups' elements (top items)
190    {
191        QFont fontSmall = option.font;
192        fontSmall.setBold(true);
193        fontSmall.setPixelSize(option.rect.height()*scaleFactor1);
194        QFontMetrics fmSmall(fontSmall);
195
196        QFont fontBig = option.font;
197        fontBig.setBold(true);
198        fontBig.setPixelSize(option.rect.height()*scaleFactor2);
199        QFontMetrics fmBig(fontBig);
200
201        int spacer = (fmSmall.boundingRect("999").width() < SPACER) ? SPACER : fmSmall.boundingRect("999").width();
202
203        QLinearGradient titleGradient(option.rect.topLeft(), option.rect.topRight());
204        //titleGradient.setColorAt(0.0, Qt::white);
205        titleGradient.setColorAt(0.0, bkgrColor);
206        titleGradient.setColorAt(0.5, Qt::white);
207        titleGradient.setColorAt(1.0, bkgrColor);
208
209        QPainterPath titlePath;
210        if(isExpanded(index))
211        {
212            titlePath.moveTo(option.rect.bottomLeft());
213            titlePath.lineTo(option.rect.topLeft()+QPoint(0, RADIUS));
214            titlePath.arcTo(option.rect.left(), option.rect.top(), 2*RADIUS, 2*RADIUS, 180, -90);
215            titlePath.lineTo(option.rect.topRight()-QPoint(RADIUS, 0));
216            titlePath.arcTo(option.rect.right()-2*RADIUS, option.rect.top(), 2*RADIUS, 2*RADIUS, 90, -90);
217            titlePath.lineTo(option.rect.bottomRight());
218            titlePath.closeSubpath();
219        }
220        else
221        {
222            titlePath.lineTo(option.rect.topLeft()+QPoint(0, RADIUS));
223            titlePath.arcTo(option.rect.left(), option.rect.top(), 2*RADIUS, 2*RADIUS, 180, -90);
224            titlePath.lineTo(option.rect.topRight()-QPoint(RADIUS, 0));
225            titlePath.arcTo(option.rect.right()-2*RADIUS, option.rect.top(), 2*RADIUS, 2*RADIUS, 90, -90);
226            titlePath.lineTo(option.rect.bottomRight()-QPoint(0, RADIUS));
227            titlePath.arcTo(option.rect.right()-2*RADIUS, option.rect.bottom()-2*RADIUS, 2*RADIUS, 2*RADIUS, 0, -90);
228            titlePath.lineTo(option.rect.bottomLeft()+QPoint(RADIUS, 0));
229            titlePath.arcTo(option.rect.left(), option.rect.bottom()-2*RADIUS, 2*RADIUS, 2*RADIUS, 270, -90);     
230            titlePath.closeSubpath();
231        }
232
233        painter->setBrush(titleGradient);
234        painter->setPen(borderPen);
235        painter->drawPath(titlePath);
236
237        // draw icons
238        painter->setFont(fontSmall);
239        QImage *image = mControls[FavouriteControlOn]->image();
240        QPoint drawPoint =
241            option.rect.topRight()
242            - QPoint(
243                    spacer + image->width(),
244                    - option.rect.height()/2 + image->height()/2);
245        painter->drawImage(drawPoint,*image);
246        painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
247                QString::number(numberOfFavourities(index)));
248#ifdef MAEMO
249        drawPoint.setX(drawPoint.x() - spacer - image->width());
250        painter->drawImage(drawPoint,*mControls[AlarmControlOn]->image());
251        painter->drawText(drawPoint+QPoint(image->width()+2, image->height() - 2),
252                QString::number(numberOfAlarms(index)));
253#endif
254        // draw texts
255        QString numEvents = QString::number(index.model()->rowCount(index)).append("/");
256        drawPoint.setX(drawPoint.x() - spacer - fmSmall.boundingRect(numEvents).width());
257        drawPoint.setY(drawPoint.y()+image->height() - 2);
258        painter->drawText(drawPoint,numEvents);
259
260        QPointF titlePointF = QPoint(
261                option.rect.x()+SPACER,
262                option.rect.y()+option.rect.height()-fmBig.descent());
263        painter->setFont(fontBig);
264
265        painter->drawText(titlePointF,qVariantValue<QString>(index.data()));
266    }
267
268    //// HIGHLIGHTING SELECTED ITEM
269    //if (option.state & QStyle::State_Selected)
270        //painter->fillRect(option.rect, option.palette.highlight());
271
272    painter->restore();
273}
274
275QSize Delegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
276{
277    Q_UNUSED(option)
278
279    if (index.internalId() == 0) // time group
280    {
281        return QSize(40,40);
282    }
283    else // event
284    {
285        return QSize(100,100);
286    }
287}
288
289bool Delegate::hasParent( const QModelIndex &index ) const
290{
291    if( index.parent().isValid() )
292        return true;
293    else
294        return false;
295}
296 
297bool Delegate::isLast( const QModelIndex &index ) const
298{
299    if(!hasParent(index))
300        return false; // what should be returned here?
301
302    if(index.row() >= (index.model()->rowCount(index.parent())-1))
303        return true;
304    else
305        return false;
306}
307
308bool Delegate::isExpanded( const QModelIndex &index ) const
309{
310    if( !mViewPtr )
311        return false;
312    else
313        return mViewPtr->isExpanded( index );
314}
315
316Delegate::ControlId Delegate::whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const
317{
318    if(!hasParent(aIndex)) // time-group item (root item)
319        return ControlNone;
320
321    QListIterator<ControlId> i(mControls.keys());
322    while (i.hasNext())
323    {
324        ControlId id = i.next();
325        if(mControls[id]->drawRect(static_cast<QTreeView*>(parent())->visualRect(aIndex)).contains(aPoint))
326        {
327            if(id == WarningControl)
328            {
329                if(static_cast<Event*>(aIndex.internalPointer())->hasTimeConflict())
330                    return id;
331            }
332            else
333                return id;
334        }
335    }
336
337    return ControlNone;
338}
339
340Delegate::Control::Control(ControlId aControlId, const QString &aImageName, const Control* prev_control)
341    : mId(aControlId)
342    , mImage(new QImage(aImageName))
343    , mDrawPoint(QPoint(0,0))
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
355void Delegate::Control::paint(QPainter* painter, const QRect rect)
356{
357    painter->drawImage(drawPoint(rect),*image());
358}
359
360void Delegate::defineControls()
361{
362    // FAVOURITE ICONs
363    // on
364    mControls.insert(FavouriteControlOn, new Control(FavouriteControlOn, QString(":icons/favourite-onBig.png"), NULL));
365    // off
366    mControls.insert(FavouriteControlOff, new Control(FavouriteControlOff, QString(":icons/favourite-offBig.png"), NULL));
367
368#ifdef MAEMO
369    // ALARM ICONs
370    // on
371    mControls.insert(AlarmControlOn,
372                    new Control(AlarmControlOn, QString(":icons/alarm-onBig.png"), mControls[FavouriteControlOn]));
373    // off
374    mControls.insert(AlarmControlOff,
375                    new Control(AlarmControlOff, QString(":icons/alarm-offBig.png"), mControls[FavouriteControlOff]));
376
377    // MAP ICON
378    mControls.insert(MapControl,
379                    new Control(MapControl, QString(":icons/compassBig.png"), mControls[AlarmControlOn]));
380#else
381    // MAP ICON
382    mControls.insert(MapControl,
383                    new Control(MapControl, QString(":icons/compassBig.png"), mControls[FavouriteControlOn]));
384#endif
385
386    // WARNING ICON
387    mControls.insert(WarningControl,
388                    new Control(WarningControl, QString(":icons/exclamation.png"), mControls[MapControl]));
389}
390
391bool Delegate::isPointFromRect(const QPoint &aPoint, const QRect &aRect) const
392{
393    if( (aPoint.x()>=aRect.left() && aPoint.x()<=aRect.right()) && (aPoint.y()>=aRect.top() && aPoint.y()<=aRect.bottom()) )
394        return true;
395
396    return false;
397}
398
399int Delegate::numberOfFavourities(const QModelIndex &index) const
400{
401    if(index.parent().isValid()) // it's event, not time-group
402        return 0;
403
404    int nrofFavs = 0;
405    for(int i=0; i<index.model()->rowCount(index); i++)
406        if(static_cast<Event*>(index.child(i,0).internalPointer())->isFavourite())
407            nrofFavs++;
408
409    return nrofFavs;
410}
411
412int Delegate::numberOfAlarms(const QModelIndex &index) const
413{
414    if(index.parent().isValid()) // it's event, not time-group
415        return 0;
416
417    int nrofAlarms = 0;
418    for(int i=0; i<index.model()->rowCount(index); i++)
419        if(static_cast<Event*>(index.child(i,0).internalPointer())->hasAlarm())
420            nrofAlarms++;
421
422    return nrofAlarms;
423}
424
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