source: trunk/demos/embedded/weatherinfo/weatherinfo.cpp@ 846

Last change on this file since 846 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
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File size: 19.2 KB
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1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the demonstration applications of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <QtCore>
43#include <QtGui>
44#include <QtNetwork>
45#include <QtSvg>
46
47class WeatherInfo: public QMainWindow
48{
49 Q_OBJECT
50
51private:
52
53 QGraphicsView *m_view;
54 QGraphicsScene m_scene;
55 QString city;
56 QGraphicsRectItem *m_statusItem;
57 QGraphicsTextItem *m_temperatureItem;
58 QGraphicsTextItem *m_conditionItem;
59 QGraphicsSvgItem *m_iconItem;
60 QList<QGraphicsRectItem*> m_forecastItems;
61 QList<QGraphicsTextItem*> m_dayItems;
62 QList<QGraphicsSvgItem*> m_conditionItems;
63 QList<QGraphicsTextItem*> m_rangeItems;
64 QTimeLine m_timeLine;
65 QHash<QString, QString> m_icons;
66 QNetworkAccessManager m_manager;
67
68public:
69 WeatherInfo(QWidget *parent = 0): QMainWindow(parent) {
70
71 m_view = new QGraphicsView(this);
72 setCentralWidget(m_view);
73
74 setupScene();
75 m_view->setScene(&m_scene);
76 m_view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
77 m_view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
78
79 m_view->setFrameShape(QFrame::NoFrame);
80 setWindowTitle("Weather Info");
81
82 QStringList cities;
83 cities << "Oslo";
84 cities << "Berlin";
85 cities << "Brisbane";
86 cities << "Helsinki";
87 cities << "San Diego";
88 for (int i = 0; i < cities.count(); ++i) {
89 QAction *action = new QAction(cities[i], this);
90 connect(action, SIGNAL(triggered()), SLOT(chooseCity()));
91 addAction(action);
92#if defined(Q_OS_SYMBIAN)
93 menuBar()->addAction(action);
94#endif
95 }
96 setContextMenuPolicy(Qt::ActionsContextMenu);
97
98 connect(&m_manager, SIGNAL(finished(QNetworkReply*)),
99 this, SLOT(handleNetworkData(QNetworkReply*)));
100
101 QTimer::singleShot(0, this, SLOT(delayedInit()));
102 }
103
104private slots:
105 void delayedInit() {
106 request("Oslo");
107 }
108
109private slots:
110
111 void chooseCity() {
112 QAction *action = qobject_cast<QAction*>(sender());
113 if (action)
114 request(action->text());
115 }
116
117 void handleNetworkData(QNetworkReply *networkReply) {
118 QUrl url = networkReply->url();
119 if (!networkReply->error())
120 digest(QString::fromUtf8(networkReply->readAll()));
121 networkReply->deleteLater();
122 }
123
124 void animate(int frame) {
125 qreal progress = static_cast<qreal>(frame) / 100;
126#if QT_VERSION >= 0x040500
127 m_iconItem->setOpacity(progress);
128#endif
129 qreal hw = width() / 2.0;
130 m_statusItem->setPos(-hw + hw * progress, 0);
131 for (int i = 0; i < m_forecastItems.count(); ++i) {
132 qreal ofs = i * 0.5 / m_forecastItems.count();
133 qreal alpha = qBound(qreal(0), 2 * (progress - ofs), qreal(1));
134#if QT_VERSION >= 0x040500
135 m_conditionItems[i]->setOpacity(alpha);
136#endif
137 QPointF pos = m_forecastItems[i]->pos();
138 if (width() > height()) {
139 qreal fx = width() - width() * 0.4 * alpha;
140 m_forecastItems[i]->setPos(fx, pos.y());
141 } else {
142 qreal fx = height() - height() * 0.5 * alpha;
143 m_forecastItems[i]->setPos(pos.x(), fx);
144 }
145 }
146 }
147
148private:
149
150 void setupScene() {
151
152 QColor textColor = palette().color(QPalette::WindowText);
153 QFont textFont = font();
154 textFont.setBold(true);
155 textFont.setPointSize(textFont.pointSize() * 2);
156
157 m_temperatureItem = m_scene.addText(QString(), textFont);
158 m_temperatureItem->setDefaultTextColor(textColor);
159
160 m_conditionItem = m_scene.addText(QString(), textFont);
161 m_conditionItem->setDefaultTextColor(textColor);
162
163 m_iconItem = new QGraphicsSvgItem;
164 m_scene.addItem(m_iconItem);
165
166 m_statusItem = m_scene.addRect(0, 0, 10, 10);
167 m_statusItem->setPen(Qt::NoPen);
168 m_statusItem->setBrush(Qt::NoBrush);
169 m_temperatureItem->setParentItem(m_statusItem);
170 m_conditionItem->setParentItem(m_statusItem);
171 m_iconItem->setParentItem(m_statusItem);
172
173 connect(&m_timeLine, SIGNAL(frameChanged(int)), SLOT(animate(int)));
174 m_timeLine.setDuration(1100);
175 m_timeLine.setFrameRange(0, 100);
176 m_timeLine.setCurveShape(QTimeLine::EaseInCurve);
177 }
178
179 void request(const QString &location) {
180 QUrl url("http://www.google.com/ig/api");
181 url.addEncodedQueryItem("hl", "en");
182 url.addEncodedQueryItem("weather", QUrl::toPercentEncoding(location));
183
184 m_manager.get(QNetworkRequest(url));
185
186 city = QString();
187 setWindowTitle("Loading...");
188 }
189
190 QString extractIcon(const QString &data) {
191 if (m_icons.isEmpty()) {
192 m_icons["mostly_cloudy"] = "weather-few-clouds";
193 m_icons["cloudy"] = "weather-overcast";
194 m_icons["mostly_sunny"] = "weather-sunny-very-few-clouds";
195 m_icons["partly_cloudy"] = "weather-sunny-very-few-clouds";
196 m_icons["sunny"] = "weather-sunny";
197 m_icons["flurries"] = "weather-snow";
198 m_icons["fog"] = "weather-fog";
199 m_icons["haze"] = "weather-haze";
200 m_icons["icy"] = "weather-icy";
201 m_icons["sleet"] = "weather-sleet";
202 m_icons["chance_of_sleet"] = "weather-sleet";
203 m_icons["snow"] = "weather-snow";
204 m_icons["chance_of_snow"] = "weather-snow";
205 m_icons["mist"] = "weather-showers";
206 m_icons["rain"] = "weather-showers";
207 m_icons["chance_of_rain"] = "weather-showers";
208 m_icons["storm"] = "weather-storm";
209 m_icons["chance_of_storm"] = "weather-storm";
210 m_icons["thunderstorm"] = "weather-thundershower";
211 m_icons["chance_of_tstorm"] = "weather-thundershower";
212 }
213 QRegExp regex("([\\w]+).gif$");
214 if (regex.indexIn(data) != -1) {
215 QString i = regex.cap();
216 i = i.left(i.length() - 4);
217 QString name = m_icons.value(i);
218 if (!name.isEmpty()) {
219 name.prepend(":/icons/");
220 name.append(".svg");
221 return name;
222 }
223 }
224 return QString();
225 }
226
227 static QString toCelcius(QString t, QString unit) {
228 bool ok = false;
229 int degree = t.toInt(&ok);
230 if (!ok)
231 return QString();
232 if (unit != "SI")
233 degree = ((degree - 32) * 5 + 8)/ 9;
234 return QString::number(degree) + QChar(176);
235 }
236
237
238#define GET_DATA_ATTR xml.attributes().value("data").toString()
239
240 void digest(const QString &data) {
241
242 QColor textColor = palette().color(QPalette::WindowText);
243 QString unitSystem;
244
245 delete m_iconItem;
246 m_iconItem = new QGraphicsSvgItem();
247 m_scene.addItem(m_iconItem);
248 m_iconItem->setParentItem(m_statusItem);
249 qDeleteAll(m_dayItems);
250 qDeleteAll(m_conditionItems);
251 qDeleteAll(m_rangeItems);
252 qDeleteAll(m_forecastItems);
253 m_dayItems.clear();
254 m_conditionItems.clear();
255 m_rangeItems.clear();
256 m_forecastItems.clear();
257
258 QXmlStreamReader xml(data);
259 while (!xml.atEnd()) {
260 xml.readNext();
261 if (xml.tokenType() == QXmlStreamReader::StartElement) {
262 if (xml.name() == "city") {
263 city = GET_DATA_ATTR;
264 setWindowTitle(city);
265 }
266 if (xml.name() == "unit_system")
267 unitSystem = xml.attributes().value("data").toString();
268 // Parse current weather conditions
269 if (xml.name() == "current_conditions") {
270 while (!xml.atEnd()) {
271 xml.readNext();
272 if (xml.name() == "current_conditions")
273 break;
274 if (xml.tokenType() == QXmlStreamReader::StartElement) {
275 if (xml.name() == "condition") {
276 m_conditionItem->setPlainText(GET_DATA_ATTR);
277 }
278 if (xml.name() == "icon") {
279 QString name = extractIcon(GET_DATA_ATTR);
280 if (!name.isEmpty()) {
281 delete m_iconItem;
282 m_iconItem = new QGraphicsSvgItem(name);
283 m_scene.addItem(m_iconItem);
284 m_iconItem->setParentItem(m_statusItem);
285 }
286 }
287 if (xml.name() == "temp_c") {
288 QString s = GET_DATA_ATTR + QChar(176);
289 m_temperatureItem->setPlainText(s);
290 }
291 }
292 }
293 }
294 // Parse and collect the forecast conditions
295 if (xml.name() == "forecast_conditions") {
296 QGraphicsTextItem *dayItem = 0;
297 QGraphicsSvgItem *statusItem = 0;
298 QString lowT, highT;
299 while (!xml.atEnd()) {
300 xml.readNext();
301 if (xml.name() == "forecast_conditions") {
302 if (dayItem && statusItem &&
303 !lowT.isEmpty() && !highT.isEmpty()) {
304 m_dayItems << dayItem;
305 m_conditionItems << statusItem;
306 QString txt = highT + '/' + lowT;
307 QGraphicsTextItem* rangeItem;
308 rangeItem = m_scene.addText(txt);
309 rangeItem->setDefaultTextColor(textColor);
310 m_rangeItems << rangeItem;
311 QGraphicsRectItem *box;
312 box = m_scene.addRect(0, 0, 10, 10);
313 box->setPen(Qt::NoPen);
314 box->setBrush(Qt::NoBrush);
315 m_forecastItems << box;
316 dayItem->setParentItem(box);
317 statusItem->setParentItem(box);
318 rangeItem->setParentItem(box);
319 } else {
320 delete dayItem;
321 delete statusItem;
322 }
323 break;
324 }
325 if (xml.tokenType() == QXmlStreamReader::StartElement) {
326 if (xml.name() == "day_of_week") {
327 QString s = GET_DATA_ATTR;
328 dayItem = m_scene.addText(s.left(3));
329 dayItem->setDefaultTextColor(textColor);
330 }
331 if (xml.name() == "icon") {
332 QString name = extractIcon(GET_DATA_ATTR);
333 if (!name.isEmpty()) {
334 statusItem = new QGraphicsSvgItem(name);
335 m_scene.addItem(statusItem);
336 }
337 }
338 if (xml.name() == "low")
339 lowT = toCelcius(GET_DATA_ATTR, unitSystem);
340 if (xml.name() == "high")
341 highT = toCelcius(GET_DATA_ATTR, unitSystem);
342 }
343 }
344 }
345
346 }
347 }
348
349 m_timeLine.stop();
350 layoutItems();
351 animate(0);
352 m_timeLine.start();
353 }
354
355 void layoutItems() {
356 m_scene.setSceneRect(0, 0, width() - 1, height() - 1);
357 m_view->centerOn(width() / 2, height() / 2);
358 if (width() > height())
359 layoutItemsLandscape();
360 else
361 layoutItemsPortrait();
362 }
363
364 void layoutItemsLandscape() {
365 m_statusItem->setRect(0, 0, width() / 2 - 1, height() - 1);
366
367 if (!m_iconItem->boundingRect().isEmpty()) {
368 qreal dim = qMin(width() * 0.6, height() * 0.8);
369 qreal pad = (height() - dim) / 2;
370 qreal sw = dim / m_iconItem->boundingRect().width();
371 qreal sh = dim / m_iconItem->boundingRect().height();
372 m_iconItem->setTransform(QTransform().scale(sw, sh));
373 m_iconItem->setPos(1, pad);
374 }
375
376 m_temperatureItem->setPos(2, 2);
377 qreal h = m_conditionItem->boundingRect().height();
378 m_conditionItem->setPos(10, height() - h);
379
380 if (m_dayItems.count()) {
381 qreal left = width() * 0.6;
382 qreal h = height() / m_dayItems.count();
383 QFont textFont = font();
384 textFont.setPixelSize(static_cast<int>(h * 0.3));
385 qreal statusWidth = 0;
386 qreal rangeWidth = 0;
387 for (int i = 0; i < m_dayItems.count(); ++i) {
388 m_dayItems[i]->setFont(textFont);
389 QRectF brect = m_dayItems[i]->boundingRect();
390 statusWidth = qMax(statusWidth, brect.width());
391 brect = m_rangeItems[i]->boundingRect();
392 rangeWidth = qMax(rangeWidth, brect.width());
393 }
394 qreal space = width() - left - statusWidth - rangeWidth;
395 qreal dim = qMin(h, space);
396 qreal pad = statusWidth + (space - dim) / 2;
397 for (int i = 0; i < m_dayItems.count(); ++i) {
398 qreal base = h * i;
399 m_forecastItems[i]->setPos(left, base);
400 m_forecastItems[i]->setRect(0, 0, width() - left, h);
401 QRectF brect = m_dayItems[i]->boundingRect();
402 qreal ofs = (h - brect.height()) / 2;
403 m_dayItems[i]->setPos(0, ofs);
404 brect = m_rangeItems[i]->boundingRect();
405 ofs = (h - brect.height()) / 2;
406 m_rangeItems[i]->setPos(width() - rangeWidth - left, ofs);
407 brect = m_conditionItems[i]->boundingRect();
408 ofs = (h - dim) / 2;
409 m_conditionItems[i]->setPos(pad, ofs);
410 if (brect.isEmpty())
411 continue;
412 qreal sw = dim / brect.width();
413 qreal sh = dim / brect.height();
414 m_conditionItems[i]->setTransform(QTransform().scale(sw, sh));
415 }
416 }
417 }
418
419 void layoutItemsPortrait() {
420
421 m_statusItem->setRect(0, 0, width() - 1, height() / 2 - 1);
422
423 if (!m_iconItem->boundingRect().isEmpty()) {
424 qreal dim = qMin(width() * 0.8, height() * 0.4);
425 qreal ofsy = (height() / 2 - dim) / 2;
426 qreal ofsx = (width() - dim) / 3;
427 qreal sw = dim / m_iconItem->boundingRect().width();
428 qreal sh = dim / m_iconItem->boundingRect().height();
429 m_iconItem->setTransform(QTransform().scale(sw, sh));
430 m_iconItem->setPos(ofsx, ofsy);
431 }
432
433 m_temperatureItem->setPos(2, 2);
434 qreal ch = m_conditionItem->boundingRect().height();
435 qreal cw = m_conditionItem->boundingRect().width();
436 m_conditionItem->setPos(width() - cw , height() / 2 - ch - 20);
437
438 if (m_dayItems.count()) {
439 qreal top = height() * 0.5;
440 qreal w = width() / m_dayItems.count();
441 qreal statusHeight = 0;
442 qreal rangeHeight = 0;
443 for (int i = 0; i < m_dayItems.count(); ++i) {
444 m_dayItems[i]->setFont(font());
445 QRectF brect = m_dayItems[i]->boundingRect();
446 statusHeight = qMax(statusHeight, brect.height());
447 brect = m_rangeItems[i]->boundingRect();
448 rangeHeight = qMax(rangeHeight, brect.height());
449 }
450 qreal space = height() - top - statusHeight - rangeHeight;
451 qreal dim = qMin(w, space);
452
453 qreal boxh = statusHeight + rangeHeight + dim;
454 qreal pad = (height() - top - boxh) / 2;
455
456 for (int i = 0; i < m_dayItems.count(); ++i) {
457 qreal base = w * i;
458 m_forecastItems[i]->setPos(base, top);
459 m_forecastItems[i]->setRect(0, 0, w, boxh);
460 QRectF brect = m_dayItems[i]->boundingRect();
461 qreal ofs = (w - brect.width()) / 2;
462 m_dayItems[i]->setPos(ofs, pad);
463
464 brect = m_rangeItems[i]->boundingRect();
465 ofs = (w - brect.width()) / 2;
466 m_rangeItems[i]->setPos(ofs, pad + statusHeight + dim);
467
468 brect = m_conditionItems[i]->boundingRect();
469 ofs = (w - dim) / 2;
470 m_conditionItems[i]->setPos(ofs, pad + statusHeight);
471 if (brect.isEmpty())
472 continue;
473 qreal sw = dim / brect.width();
474 qreal sh = dim / brect.height();
475 m_conditionItems[i]->setTransform(QTransform().scale(sw, sh));
476 }
477 }
478 }
479
480
481 void resizeEvent(QResizeEvent *event) {
482 Q_UNUSED(event);
483 layoutItems();
484 }
485
486};
487
488#include "weatherinfo.moc"
489
490int main(int argc, char *argv[])
491{
492 QApplication app(argc, argv);
493
494 WeatherInfo w;
495#if defined(Q_OS_SYMBIAN)
496 w.showMaximized();
497#else
498 w.resize(520, 288);
499 w.show();
500#endif
501
502 return app.exec();
503}
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