#include <QtCore>
#include <QtWidgets>
#include <QtNetwork>
#include <QtSvg>
class WeatherInfo: public QMainWindow
{
Q_OBJECT
private:
QGraphicsView *m_view;
QGraphicsScene m_scene;
QString city;
QGraphicsRectItem *m_statusItem;
QGraphicsTextItem *m_temperatureItem;
QGraphicsTextItem *m_conditionItem;
QGraphicsSvgItem *m_iconItem;
QList<QGraphicsRectItem*> m_forecastItems;
QList<QGraphicsTextItem*> m_dayItems;
QList<QGraphicsSvgItem*> m_conditionItems;
QList<QGraphicsTextItem*> m_rangeItems;
QTimeLine m_timeLine;
QHash<QString, QString> m_icons;
QNetworkAccessManager m_manager;
public:
WeatherInfo(QWidget *parent = 0): QMainWindow(parent) {
m_view = new QGraphicsView(this);
setCentralWidget(m_view);
setupScene();
m_view->setScene(&m_scene);
m_view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_view->setFrameShape(QFrame::NoFrame);
setWindowTitle("Weather Info");
QStringList cities;
cities << "Oslo";
cities << "Berlin";
cities << "Brisbane";
cities << "Helsinki";
cities << "San Diego";
for (int i = 0; i < cities.count(); ++i) {
QAction *action = new QAction(cities[i], this);
connect(action, SIGNAL(triggered()), SLOT(chooseCity()));
addAction(action);
}
setContextMenuPolicy(Qt::ActionsContextMenu);
connect(&m_manager, SIGNAL(finished(QNetworkReply*)),
this, SLOT(handleNetworkData(QNetworkReply*)));
QTimer::singleShot(0, this, SLOT(delayedInit()));
}
private slots:
void delayedInit() {
request("Oslo");
}
private slots:
void chooseCity() {
QAction *action = qobject_cast<QAction*>(sender());
if (action)
request(action->text());
}
void handleNetworkData(QNetworkReply *networkReply) {
QUrl url = networkReply->url();
if (!networkReply->error())
digest(QString::fromUtf8(networkReply->readAll()));
networkReply->deleteLater();
}
void animate(int frame) {
qreal progress = static_cast<qreal>(frame) / 100;
#if QT_VERSION >= 0x040500
m_iconItem->setOpacity(progress);
#endif
qreal hw = width() / 2.0;
m_statusItem->setPos(-hw + hw * progress, 0);
for (int i = 0; i < m_forecastItems.count(); ++i) {
qreal ofs = i * 0.5 / m_forecastItems.count();
qreal alpha = qBound(qreal(0), 2 * (progress - ofs), qreal(1));
#if QT_VERSION >= 0x040500
m_conditionItems[i]->setOpacity(alpha);
#endif
QPointF pos = m_forecastItems[i]->pos();
if (width() > height()) {
qreal fx = width() - width() * 0.4 * alpha;
m_forecastItems[i]->setPos(fx, pos.y());
} else {
qreal fx = height() - height() * 0.5 * alpha;
m_forecastItems[i]->setPos(pos.x(), fx);
}
}
}
private:
void setupScene() {
QColor textColor = palette().color(QPalette::WindowText);
QFont textFont = font();
textFont.setBold(true);
textFont.setPointSize(textFont.pointSize() * 2);
m_temperatureItem = m_scene.addText(QString(), textFont);
m_temperatureItem->setDefaultTextColor(textColor);
m_conditionItem = m_scene.addText(QString(), textFont);
m_conditionItem->setDefaultTextColor(textColor);
m_iconItem = new QGraphicsSvgItem;
m_scene.addItem(m_iconItem);
m_statusItem = m_scene.addRect(0, 0, 10, 10);
m_statusItem->setPen(Qt::NoPen);
m_statusItem->setBrush(Qt::NoBrush);
m_temperatureItem->setParentItem(m_statusItem);
m_conditionItem->setParentItem(m_statusItem);
m_iconItem->setParentItem(m_statusItem);
connect(&m_timeLine, SIGNAL(frameChanged(int)), SLOT(animate(int)));
m_timeLine.setDuration(1100);
m_timeLine.setFrameRange(0, 100);
m_timeLine.setCurveShape(QTimeLine::EaseInCurve);
}
void request(const QString &location) {
QUrl url("http://www.google.com/ig/api");
QUrlQuery query;
query.addQueryItem("hl", "en");
query.addQueryItem("weather", location);
url.setQuery(query);
m_manager.get(QNetworkRequest(url));
city = QString();
setWindowTitle("Loading...");
}
QString extractIcon(const QString &data) {
if (m_icons.isEmpty()) {
m_icons["mostly_cloudy"] = "weather-few-clouds";
m_icons["cloudy"] = "weather-overcast";
m_icons["mostly_sunny"] = "weather-sunny-very-few-clouds";
m_icons["partly_cloudy"] = "weather-sunny-very-few-clouds";
m_icons["sunny"] = "weather-sunny";
m_icons["flurries"] = "weather-snow";
m_icons["fog"] = "weather-fog";
m_icons["haze"] = "weather-haze";
m_icons["icy"] = "weather-icy";
m_icons["sleet"] = "weather-sleet";
m_icons["chance_of_sleet"] = "weather-sleet";
m_icons["snow"] = "weather-snow";
m_icons["chance_of_snow"] = "weather-snow";
m_icons["mist"] = "weather-showers";
m_icons["rain"] = "weather-showers";
m_icons["chance_of_rain"] = "weather-showers";
m_icons["storm"] = "weather-storm";
m_icons["chance_of_storm"] = "weather-storm";
m_icons["thunderstorm"] = "weather-thundershower";
m_icons["chance_of_tstorm"] = "weather-thundershower";
}
QRegExp regex("([\\w]+).gif$");
if (regex.indexIn(data) != -1) {
QString i = regex.cap();
i = i.left(i.length() - 4);
QString name = m_icons.value(i);
if (!name.isEmpty()) {
name.prepend(":/icons/");
name.append(".svg");
return name;
}
}
return QString();
}
static QString toCelcius(QString t, QString unit) {
bool ok = false;
int degree = t.toInt(&ok);
if (!ok)
return QString();
if (unit != "SI")
degree = ((degree - 32) * 5 + 8)/ 9;
return QString::number(degree) + QChar(176);
}
#define GET_DATA_ATTR xml.attributes().value("data").toString()
void digest(const QString &data) {
QColor textColor = palette().color(QPalette::WindowText);
QString unitSystem;
delete m_iconItem;
m_iconItem = new QGraphicsSvgItem();
m_scene.addItem(m_iconItem);
m_iconItem->setParentItem(m_statusItem);
qDeleteAll(m_dayItems);
qDeleteAll(m_conditionItems);
qDeleteAll(m_rangeItems);
qDeleteAll(m_forecastItems);
m_dayItems.clear();
m_conditionItems.clear();
m_rangeItems.clear();
m_forecastItems.clear();
QXmlStreamReader xml(data);
while (!xml.atEnd()) {
xml.readNext();
if (xml.tokenType() == QXmlStreamReader::StartElement) {
if (xml.name() == "city") {
city = GET_DATA_ATTR;
setWindowTitle(city);
}
if (xml.name() == "unit_system")
unitSystem = xml.attributes().value("data").toString();
if (xml.name() == "current_conditions") {
while (!xml.atEnd()) {
xml.readNext();
if (xml.name() == "current_conditions")
break;
if (xml.tokenType() == QXmlStreamReader::StartElement) {
if (xml.name() == "condition") {
m_conditionItem->setPlainText(GET_DATA_ATTR);
}
if (xml.name() == "icon") {
QString name = extractIcon(GET_DATA_ATTR);
if (!name.isEmpty()) {
delete m_iconItem;
m_iconItem = new QGraphicsSvgItem(name);
m_scene.addItem(m_iconItem);
m_iconItem->setParentItem(m_statusItem);
}
}
if (xml.name() == "temp_c") {
QString s = GET_DATA_ATTR + QChar(176);
m_temperatureItem->setPlainText(s);
}
}
}
}
if (xml.name() == "forecast_conditions") {
QGraphicsTextItem *dayItem = 0;
QGraphicsSvgItem *statusItem = 0;
QString lowT, highT;
while (!xml.atEnd()) {
xml.readNext();
if (xml.name() == "forecast_conditions") {
if (dayItem && statusItem &&
!lowT.isEmpty() && !highT.isEmpty()) {
m_dayItems << dayItem;
m_conditionItems << statusItem;
QString txt = highT + '/' + lowT;
QGraphicsTextItem* rangeItem;
rangeItem = m_scene.addText(txt);
rangeItem->setDefaultTextColor(textColor);
m_rangeItems << rangeItem;
QGraphicsRectItem *box;
box = m_scene.addRect(0, 0, 10, 10);
box->setPen(Qt::NoPen);
box->setBrush(Qt::NoBrush);
m_forecastItems << box;
dayItem->setParentItem(box);
statusItem->setParentItem(box);
rangeItem->setParentItem(box);
} else {
delete dayItem;
delete statusItem;
}
break;
}
if (xml.tokenType() == QXmlStreamReader::StartElement) {
if (xml.name() == "day_of_week") {
QString s = GET_DATA_ATTR;
dayItem = m_scene.addText(s.left(3));
dayItem->setDefaultTextColor(textColor);
}
if (xml.name() == "icon") {
QString name = extractIcon(GET_DATA_ATTR);
if (!name.isEmpty()) {
statusItem = new QGraphicsSvgItem(name);
m_scene.addItem(statusItem);
}
}
if (xml.name() == "low")
lowT = toCelcius(GET_DATA_ATTR, unitSystem);
if (xml.name() == "high")
highT = toCelcius(GET_DATA_ATTR, unitSystem);
}
}
}
}
}
m_timeLine.stop();
layoutItems();
animate(0);
m_timeLine.start();
}
void layoutItems() {
m_scene.setSceneRect(0, 0, width() - 1, height() - 1);
m_view->centerOn(width() / 2, height() / 2);
if (width() > height())
layoutItemsLandscape();
else
layoutItemsPortrait();
}
void layoutItemsLandscape() {
m_statusItem->setRect(0, 0, width() / 2 - 1, height() - 1);
if (!m_iconItem->boundingRect().isEmpty()) {
qreal dim = qMin(width() * 0.6, height() * 0.8);
qreal pad = (height() - dim) / 2;
qreal sw = dim / m_iconItem->boundingRect().width();
qreal sh = dim / m_iconItem->boundingRect().height();
m_iconItem->setTransform(QTransform().scale(sw, sh));
m_iconItem->setPos(1, pad);
}
m_temperatureItem->setPos(2, 2);
qreal h = m_conditionItem->boundingRect().height();
m_conditionItem->setPos(10, height() - h);
if (m_dayItems.count()) {
qreal left = width() * 0.6;
qreal h = height() / m_dayItems.count();
QFont textFont = font();
textFont.setPixelSize(static_cast<int>(h * 0.3));
qreal statusWidth = 0;
qreal rangeWidth = 0;
for (int i = 0; i < m_dayItems.count(); ++i) {
m_dayItems[i]->setFont(textFont);
QRectF brect = m_dayItems[i]->boundingRect();
statusWidth = qMax(statusWidth, brect.width());
brect = m_rangeItems[i]->boundingRect();
rangeWidth = qMax(rangeWidth, brect.width());
}
qreal space = width() - left - statusWidth - rangeWidth;
qreal dim = qMin(h, space);
qreal pad = statusWidth + (space - dim) / 2;
for (int i = 0; i < m_dayItems.count(); ++i) {
qreal base = h * i;
m_forecastItems[i]->setPos(left, base);
m_forecastItems[i]->setRect(0, 0, width() - left, h);
QRectF brect = m_dayItems[i]->boundingRect();
qreal ofs = (h - brect.height()) / 2;
m_dayItems[i]->setPos(0, ofs);
brect = m_rangeItems[i]->boundingRect();
ofs = (h - brect.height()) / 2;
m_rangeItems[i]->setPos(width() - rangeWidth - left, ofs);
brect = m_conditionItems[i]->boundingRect();
ofs = (h - dim) / 2;
m_conditionItems[i]->setPos(pad, ofs);
if (brect.isEmpty())
continue;
qreal sw = dim / brect.width();
qreal sh = dim / brect.height();
m_conditionItems[i]->setTransform(QTransform().scale(sw, sh));
}
}
}
void layoutItemsPortrait() {
m_statusItem->setRect(0, 0, width() - 1, height() / 2 - 1);
if (!m_iconItem->boundingRect().isEmpty()) {
qreal dim = qMin(width() * 0.8, height() * 0.4);
qreal ofsy = (height() / 2 - dim) / 2;
qreal ofsx = (width() - dim) / 3;
qreal sw = dim / m_iconItem->boundingRect().width();
qreal sh = dim / m_iconItem->boundingRect().height();
m_iconItem->setTransform(QTransform().scale(sw, sh));
m_iconItem->setPos(ofsx, ofsy);
}
m_temperatureItem->setPos(2, 2);
qreal ch = m_conditionItem->boundingRect().height();
qreal cw = m_conditionItem->boundingRect().width();
m_conditionItem->setPos(width() - cw , height() / 2 - ch - 20);
if (m_dayItems.count()) {
qreal top = height() * 0.5;
qreal w = width() / m_dayItems.count();
qreal statusHeight = 0;
qreal rangeHeight = 0;
for (int i = 0; i < m_dayItems.count(); ++i) {
m_dayItems[i]->setFont(font());
QRectF brect = m_dayItems[i]->boundingRect();
statusHeight = qMax(statusHeight, brect.height());
brect = m_rangeItems[i]->boundingRect();
rangeHeight = qMax(rangeHeight, brect.height());
}
qreal space = height() - top - statusHeight - rangeHeight;
qreal dim = qMin(w, space);
qreal boxh = statusHeight + rangeHeight + dim;
qreal pad = (height() - top - boxh) / 2;
for (int i = 0; i < m_dayItems.count(); ++i) {
qreal base = w * i;
m_forecastItems[i]->setPos(base, top);
m_forecastItems[i]->setRect(0, 0, w, boxh);
QRectF brect = m_dayItems[i]->boundingRect();
qreal ofs = (w - brect.width()) / 2;
m_dayItems[i]->setPos(ofs, pad);
brect = m_rangeItems[i]->boundingRect();
ofs = (w - brect.width()) / 2;
m_rangeItems[i]->setPos(ofs, pad + statusHeight + dim);
brect = m_conditionItems[i]->boundingRect();
ofs = (w - dim) / 2;
m_conditionItems[i]->setPos(ofs, pad + statusHeight);
if (brect.isEmpty())
continue;
qreal sw = dim / brect.width();
qreal sh = dim / brect.height();
m_conditionItems[i]->setTransform(QTransform().scale(sw, sh));
}
}
}
void resizeEvent(QResizeEvent *event) {
Q_UNUSED(event);
layoutItems();
}
};
#include "weatherinfo.moc"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
WeatherInfo w;
w.resize(520, 288);
w.show();
return app.exec();
}
