166 lines
4.1 KiB
C++
Executable File
166 lines
4.1 KiB
C++
Executable File
/*==============================================================================
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Copyright 2018 by Roland Rabien
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For more information visit www.rabiensoftware.com
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==============================================================================*/
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MapViewer::MapViewer()
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: zoom (14),
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xoffset (0),
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yoffset (0),
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userAdjusted (false),
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posMarker (juce::Point<double>())
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{
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mapsize = osm->getMapWidthPixels(zoom);
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osm->addListener (this);
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centerOn (-123.41480970382690, 48.490145885498649);
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}
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MapViewer::~MapViewer()
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{
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osm->removeListener (this);
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clearDoubleBuffer();
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}
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void MapViewer::setZoom (int zoom_)
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{
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zoom_ = jlimit (0, 18, zoom_);
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if (zoom != zoom_)
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{
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zoom = zoom_;
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mapsize = osm->getMapWidthPixels(zoom);
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osm->clearQueue();
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mapUpdated();
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}
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}
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void MapViewer::tileFetched (int zoom_, int x, int y)
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{
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if (zoom == zoom_)
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{
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mapUpdated();
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repaint (x * 256 - xoffset, y * 256 - yoffset, 256, 256);
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}
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}
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void MapViewer::resized()
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{
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centerOn (centerPt.getX(), centerPt.getY());
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mapUpdated();
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}
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void MapViewer::paint (Graphics& g)
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{
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updateDoubleBuffer();
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if (doubleBuffer != nullptr)
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g.drawImageAt (*doubleBuffer, 0, 0);
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}
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void MapViewer::mouseDown (const MouseEvent& e)
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{
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lastPos = e.getPosition();
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}
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void MapViewer::mouseDrag (const MouseEvent& e)
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{
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userAdjusted = true;
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auto curPos = e.getPosition();
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xoffset = jlimit (0, mapsize - getWidth(), xoffset - (curPos.getX() - lastPos.getX()));
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yoffset = jlimit (0, mapsize - getHeight(), yoffset - (curPos.getY() - lastPos.getY()));
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centerPt = osm->displayToCoordinate (juce::Point<double>(xoffset + getWidth() / 2, yoffset + getHeight() / 2), zoom);
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lastPos = curPos;
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mapUpdated();
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}
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void MapViewer::mouseWheelMove (const MouseEvent& e, const MouseWheelDetails& wheel)
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{
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userAdjusted = true;
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wheelDelta += wheel.deltaY;
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if (std::abs (wheelDelta) > 0.1 || ! wheel.isSmooth)
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{
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wheelDelta = 0;
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juce::Point<double> centerP = osm->displayToCoordinate (juce::Point<double> (xoffset + e.x, yoffset + e.y), zoom);
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if (wheel.deltaY < 0)
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setZoom (zoom - 1);
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else
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setZoom (zoom + 1);
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centerUnderPt (centerP, e.getPosition());
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}
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}
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void MapViewer::centerOn (double longCenter, double latCenter)
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{
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juce::Point<double> p = osm->coordinateToDisplay(juce::Point<double>(longCenter, latCenter), zoom);
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xoffset = jlimit (0, (mapsize - getWidth()), int (p.getX()) - getWidth() / 2);
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yoffset = jlimit (0, (mapsize - getHeight()), int (p.getY()) - getHeight() / 2);
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centerPt = juce::Point<double>(longCenter, latCenter);
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mapUpdated();
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}
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void MapViewer::centerUnderPt (juce::Point<double> world, juce::Point<int> view)
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{
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juce::Point<double> p = osm->coordinateToDisplay (world, zoom);
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xoffset = jlimit (0, jmax (1, (mapsize - getWidth())), int (p.getX()) - view.getX());
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yoffset = jlimit (0, jmax (1, (mapsize - getHeight())), int (p.getY()) - view.getY());
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centerPt = osm->displayToCoordinate (juce::Point<double>(xoffset + getWidth() / 2, yoffset + getHeight() / 2), zoom);
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repaint();
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}
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void MapViewer::updateDoubleBuffer()
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{
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if (doubleBuffer)
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return;
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Rectangle<int> rc (0, 0, getWidth(), getHeight());
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doubleBuffer = std::make_unique<Image> (Image::ARGB, rc.getWidth(), rc.getHeight(), true);
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Graphics g (*doubleBuffer);
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// draw the map tiles
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for (int x = (rc.getX() + xoffset) / 256 * 256; x <= rc.getRight() + xoffset; x += 256)
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{
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for (int y = (rc.getY() + yoffset) / 256 * 256; y <= rc.getBottom() + yoffset; y += 256)
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{
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Image tile = osm->fetchTile (zoom, x / 256, y / 256);
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g.drawImageAt (tile, x - xoffset, y - yoffset);
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}
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}
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}
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void MapViewer::clearDoubleBuffer()
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{
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if (doubleBuffer)
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doubleBuffer = nullptr;
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}
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void MapViewer::mapUpdated()
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{
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clearDoubleBuffer();
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repaint();
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}
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