5635823e17
As in the past, to avoid rewriting various autotests that contain line-number information, an extra blank line has been inserted at the end of the license text to ensure that this commit does not change the total number of lines in the license header. Change-Id: I311e001373776812699d6efc045b5f742890c689 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
283 lines
8.4 KiB
C++
283 lines
8.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtCore>
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#include <QtWidgets>
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#include <QtNetwork>
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#include <math.h>
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#include "lightmaps.h"
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#include "slippymap.h"
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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// how long (milliseconds) the user need to hold (after a tap on the screen)
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// before triggering the magnifying glass feature
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// 701, a prime number, is the sum of 229, 233, 239
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// (all three are also prime numbers, consecutive!)
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#define HOLD_TIME 701
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// maximum size of the magnifier
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// Hint: see above to find why I picked this one :)
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#define MAX_MAGNIFIER 229
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LightMaps::LightMaps(QWidget *parent)
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: QWidget(parent), pressed(false), snapped(false), zoomed(false),
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invert(false)
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{
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m_normalMap = new SlippyMap(this);
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m_largeMap = new SlippyMap(this);
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connect(m_normalMap, SIGNAL(updated(QRect)), SLOT(updateMap(QRect)));
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connect(m_largeMap, SIGNAL(updated(QRect)), SLOT(update()));
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}
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void LightMaps::setCenter(qreal lat, qreal lng)
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{
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m_normalMap->latitude = lat;
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m_normalMap->longitude = lng;
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m_normalMap->invalidate();
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m_largeMap->latitude = lat;
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m_largeMap->longitude = lng;
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m_largeMap->invalidate();
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}
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void LightMaps::toggleNightMode()
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{
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invert = !invert;
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update();
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}
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void LightMaps::updateMap(const QRect &r)
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{
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update(r);
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}
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void LightMaps::activateZoom()
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{
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zoomed = true;
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tapTimer.stop();
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m_largeMap->zoom = m_normalMap->zoom + 1;
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m_largeMap->width = m_normalMap->width * 2;
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m_largeMap->height = m_normalMap->height * 2;
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m_largeMap->latitude = m_normalMap->latitude;
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m_largeMap->longitude = m_normalMap->longitude;
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m_largeMap->invalidate();
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update();
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}
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void LightMaps::resizeEvent(QResizeEvent *)
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{
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m_normalMap->width = width();
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m_normalMap->height = height();
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m_normalMap->invalidate();
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m_largeMap->width = m_normalMap->width * 2;
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m_largeMap->height = m_normalMap->height * 2;
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m_largeMap->invalidate();
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}
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void LightMaps::paintEvent(QPaintEvent *event)
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{
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QPainter p;
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p.begin(this);
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m_normalMap->render(&p, event->rect());
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p.setPen(Qt::black);
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p.drawText(rect(), Qt::AlignBottom | Qt::TextWordWrap,
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"Map data CCBYSA 2009 OpenStreetMap.org contributors");
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p.end();
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if (zoomed) {
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int dim = qMin(width(), height());
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int magnifierSize = qMin(MAX_MAGNIFIER, dim * 2 / 3);
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int radius = magnifierSize / 2;
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int ring = radius - 15;
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QSize box = QSize(magnifierSize, magnifierSize);
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// reupdate our mask
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if (maskPixmap.size() != box) {
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maskPixmap = QPixmap(box);
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maskPixmap.fill(Qt::transparent);
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QRadialGradient g;
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g.setCenter(radius, radius);
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g.setFocalPoint(radius, radius);
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g.setRadius(radius);
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g.setColorAt(1.0, QColor(255, 255, 255, 0));
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g.setColorAt(0.5, QColor(128, 128, 128, 255));
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QPainter mask(&maskPixmap);
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mask.setRenderHint(QPainter::Antialiasing);
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mask.setCompositionMode(QPainter::CompositionMode_Source);
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mask.setBrush(g);
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mask.setPen(Qt::NoPen);
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mask.drawRect(maskPixmap.rect());
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mask.setBrush(QColor(Qt::transparent));
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mask.drawEllipse(g.center(), ring, ring);
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mask.end();
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}
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QPoint center = dragPos - QPoint(0, radius);
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center = center + QPoint(0, radius / 2);
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QPoint corner = center - QPoint(radius, radius);
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QPoint xy = center * 2 - QPoint(radius, radius);
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// only set the dimension to the magnified portion
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if (zoomPixmap.size() != box) {
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zoomPixmap = QPixmap(box);
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zoomPixmap.fill(Qt::lightGray);
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}
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if (true) {
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QPainter p(&zoomPixmap);
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p.translate(-xy);
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m_largeMap->render(&p, QRect(xy, box));
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p.end();
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}
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QPainterPath clipPath;
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clipPath.addEllipse(center, ring, ring);
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QPainter p(this);
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p.setRenderHint(QPainter::Antialiasing);
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p.setClipPath(clipPath);
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p.drawPixmap(corner, zoomPixmap);
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p.setClipping(false);
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p.drawPixmap(corner, maskPixmap);
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p.setPen(Qt::gray);
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p.drawPath(clipPath);
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}
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if (invert) {
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QPainter p(this);
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p.setCompositionMode(QPainter::CompositionMode_Difference);
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p.fillRect(event->rect(), Qt::white);
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p.end();
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}
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}
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void LightMaps::timerEvent(QTimerEvent *)
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{
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if (!zoomed)
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activateZoom();
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update();
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}
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void LightMaps::mousePressEvent(QMouseEvent *event)
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{
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if (event->buttons() != Qt::LeftButton)
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return;
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pressed = snapped = true;
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pressPos = dragPos = event->pos();
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tapTimer.stop();
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tapTimer.start(HOLD_TIME, this);
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}
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void LightMaps::mouseMoveEvent(QMouseEvent *event)
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{
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if (!event->buttons())
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return;
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if (!zoomed) {
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if (!pressed || !snapped) {
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QPoint delta = event->pos() - pressPos;
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pressPos = event->pos();
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m_normalMap->pan(delta);
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return;
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} else {
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const int threshold = 10;
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QPoint delta = event->pos() - pressPos;
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if (snapped) {
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snapped &= delta.x() < threshold;
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snapped &= delta.y() < threshold;
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snapped &= delta.x() > -threshold;
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snapped &= delta.y() > -threshold;
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}
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if (!snapped)
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tapTimer.stop();
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}
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} else {
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dragPos = event->pos();
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update();
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}
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}
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void LightMaps::mouseReleaseEvent(QMouseEvent *)
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{
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zoomed = false;
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update();
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}
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void LightMaps::keyPressEvent(QKeyEvent *event)
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{
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if (!zoomed) {
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if (event->key() == Qt::Key_Left)
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m_normalMap->pan(QPoint(20, 0));
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if (event->key() == Qt::Key_Right)
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m_normalMap->pan(QPoint(-20, 0));
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if (event->key() == Qt::Key_Up)
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m_normalMap->pan(QPoint(0, 20));
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if (event->key() == Qt::Key_Down)
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m_normalMap->pan(QPoint(0, -20));
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if (event->key() == Qt::Key_Z || event->key() == Qt::Key_Select) {
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dragPos = QPoint(width() / 2, height() / 2);
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activateZoom();
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}
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} else {
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if (event->key() == Qt::Key_Z || event->key() == Qt::Key_Select) {
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zoomed = false;
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update();
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}
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QPoint delta(0, 0);
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if (event->key() == Qt::Key_Left)
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delta = QPoint(-15, 0);
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if (event->key() == Qt::Key_Right)
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delta = QPoint(15, 0);
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if (event->key() == Qt::Key_Up)
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delta = QPoint(0, -15);
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if (event->key() == Qt::Key_Down)
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delta = QPoint(0, 15);
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if (delta != QPoint(0, 0)) {
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dragPos += delta;
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update();
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}
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}
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}
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