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-rw-r--r--examples/embedded/lightmaps/lightmaps.cpp285
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diff --git a/examples/embedded/lightmaps/lightmaps.cpp b/examples/embedded/lightmaps/lightmaps.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QtCore>
-#include <QtWidgets>
-#include <QtNetwork>
-
-#include "lightmaps.h"
-#include "slippymap.h"
-
-// 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);
- 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->position().toPoint();
- tapTimer.stop();
- tapTimer.start(HOLD_TIME, this);
-}
-
-void LightMaps::mouseMoveEvent(QMouseEvent *event)
-{
- if (!event->buttons())
- return;
- if (!zoomed) {
- if (!pressed || !snapped) {
- QPoint delta = event->position().toPoint() - pressPos;
- pressPos = event->position().toPoint();
- m_normalMap->pan(delta);
- return;
- } else {
- const int threshold = 10;
- QPoint delta = event->position().toPoint() - 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->position().toPoint();
- 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();
- }
- }
-}