/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** GNU Lesser General Public License Usage ** This file may be used under the terms of the GNU Lesser General Public ** License version 2.1 as published by the Free Software Foundation and ** appearing in the file LICENSE.LGPL included in the packaging of this ** file. Please review the following information to ensure the GNU Lesser ** General Public License version 2.1 requirements will be met: ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU General ** Public License version 3.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of this ** file. Please review the following information to ensure the GNU General ** Public License version 3.0 requirements will be met: ** http://www.gnu.org/copyleft/gpl.html. ** ** Other Usage ** Alternatively, this file may be used in accordance with the terms and ** conditions contained in a signed written agreement between you and Nokia. ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include <QtCore> #include <QtGui> #include <QtNetwork> #include <math.h> #include "lightmaps.h" #include "slippymap.h" #ifndef M_PI #define M_PI 3.14159265358979323846 #endif // how long (milliseconds) the user need to hold (after a tap on the screen) // before triggering the magnifying glass feature // 701, a prime number, is the sum of 229, 233, 239 // (all three are also prime numbers, consecutive!) #define HOLD_TIME 701 // maximum size of the magnifier // Hint: see above to find why I picked this one :) #define MAX_MAGNIFIER 229 LightMaps::LightMaps(QWidget *parent) : QWidget(parent), pressed(false), snapped(false), zoomed(false), invert(false) { m_normalMap = new SlippyMap(this); m_largeMap = new SlippyMap(this); connect(m_normalMap, SIGNAL(updated(QRect)), SLOT(updateMap(QRect))); connect(m_largeMap, SIGNAL(updated(QRect)), SLOT(update())); } void LightMaps::setCenter(qreal lat, qreal lng) { m_normalMap->latitude = lat; m_normalMap->longitude = lng; m_normalMap->invalidate(); m_largeMap->latitude = lat; m_largeMap->longitude = lng; m_largeMap->invalidate(); } void LightMaps::toggleNightMode() { invert = !invert; update(); } void LightMaps::updateMap(const QRect &r) { update(r); } void LightMaps::activateZoom() { zoomed = true; tapTimer.stop(); m_largeMap->zoom = m_normalMap->zoom + 1; m_largeMap->width = m_normalMap->width * 2; m_largeMap->height = m_normalMap->height * 2; m_largeMap->latitude = m_normalMap->latitude; m_largeMap->longitude = m_normalMap->longitude; m_largeMap->invalidate(); update(); } void LightMaps::resizeEvent(QResizeEvent *) { m_normalMap->width = width(); m_normalMap->height = height(); m_normalMap->invalidate(); m_largeMap->width = m_normalMap->width * 2; m_largeMap->height = m_normalMap->height * 2; m_largeMap->invalidate(); } void LightMaps::paintEvent(QPaintEvent *event) { QPainter p; p.begin(this); m_normalMap->render(&p, event->rect()); p.setPen(Qt::black); #if defined(Q_OS_SYMBIAN) QFont font = p.font(); font.setPixelSize(13); p.setFont(font); #endif p.drawText(rect(), Qt::AlignBottom | Qt::TextWordWrap, "Map data CCBYSA 2009 OpenStreetMap.org contributors"); p.end(); if (zoomed) { int dim = qMin(width(), height()); int magnifierSize = qMin(MAX_MAGNIFIER, dim * 2 / 3); int radius = magnifierSize / 2; int ring = radius - 15; QSize box = QSize(magnifierSize, magnifierSize); // reupdate our mask if (maskPixmap.size() != box) { maskPixmap = QPixmap(box); maskPixmap.fill(Qt::transparent); QRadialGradient g; g.setCenter(radius, radius); g.setFocalPoint(radius, radius); g.setRadius(radius); g.setColorAt(1.0, QColor(255, 255, 255, 0)); g.setColorAt(0.5, QColor(128, 128, 128, 255)); QPainter mask(&maskPixmap); mask.setRenderHint(QPainter::Antialiasing); mask.setCompositionMode(QPainter::CompositionMode_Source); mask.setBrush(g); mask.setPen(Qt::NoPen); mask.drawRect(maskPixmap.rect()); mask.setBrush(QColor(Qt::transparent)); mask.drawEllipse(g.center(), ring, ring); mask.end(); } QPoint center = dragPos - QPoint(0, radius); center = center + QPoint(0, radius / 2); QPoint corner = center - QPoint(radius, radius); QPoint xy = center * 2 - QPoint(radius, radius); // only set the dimension to the magnified portion if (zoomPixmap.size() != box) { zoomPixmap = QPixmap(box); zoomPixmap.fill(Qt::lightGray); } if (true) { QPainter p(&zoomPixmap); p.translate(-xy); m_largeMap->render(&p, QRect(xy, box)); p.end(); } QPainterPath clipPath; clipPath.addEllipse(center, ring, ring); QPainter p(this); p.setRenderHint(QPainter::Antialiasing); p.setClipPath(clipPath); p.drawPixmap(corner, zoomPixmap); p.setClipping(false); p.drawPixmap(corner, maskPixmap); p.setPen(Qt::gray); p.drawPath(clipPath); } if (invert) { QPainter p(this); p.setCompositionMode(QPainter::CompositionMode_Difference); p.fillRect(event->rect(), Qt::white); p.end(); } } void LightMaps::timerEvent(QTimerEvent *) { if (!zoomed) activateZoom(); update(); } void LightMaps::mousePressEvent(QMouseEvent *event) { if (event->buttons() != Qt::LeftButton) return; pressed = snapped = true; pressPos = dragPos = event->pos(); tapTimer.stop(); tapTimer.start(HOLD_TIME, this); } void LightMaps::mouseMoveEvent(QMouseEvent *event) { if (!event->buttons()) return; if (!zoomed) { if (!pressed || !snapped) { QPoint delta = event->pos() - pressPos; pressPos = event->pos(); m_normalMap->pan(delta); return; } else { const int threshold = 10; QPoint delta = event->pos() - pressPos; if (snapped) { snapped &= delta.x() < threshold; snapped &= delta.y() < threshold; snapped &= delta.x() > -threshold; snapped &= delta.y() > -threshold; } if (!snapped) tapTimer.stop(); } } else { dragPos = event->pos(); update(); } } void LightMaps::mouseReleaseEvent(QMouseEvent *) { zoomed = false; update(); } void LightMaps::keyPressEvent(QKeyEvent *event) { if (!zoomed) { if (event->key() == Qt::Key_Left) m_normalMap->pan(QPoint(20, 0)); if (event->key() == Qt::Key_Right) m_normalMap->pan(QPoint(-20, 0)); if (event->key() == Qt::Key_Up) m_normalMap->pan(QPoint(0, 20)); if (event->key() == Qt::Key_Down) m_normalMap->pan(QPoint(0, -20)); if (event->key() == Qt::Key_Z || event->key() == Qt::Key_Select) { dragPos = QPoint(width() / 2, height() / 2); activateZoom(); } } else { if (event->key() == Qt::Key_Z || event->key() == Qt::Key_Select) { zoomed = false; update(); } QPoint delta(0, 0); if (event->key() == Qt::Key_Left) delta = QPoint(-15, 0); if (event->key() == Qt::Key_Right) delta = QPoint(15, 0); if (event->key() == Qt::Key_Up) delta = QPoint(0, -15); if (event->key() == Qt::Key_Down) delta = QPoint(0, 15); if (delta != QPoint(0, 0)) { dragPos += delta; update(); } } }
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