MapViewer Class Reference

Interactive map viewer component using OpenStreetMap tiles. More...

#include <gin_mapviewer.h>

Inheritance diagram for MapViewer:

Public Member Functions
	MapViewer ()
	~MapViewer () override
void	setZoom (int zoom)
	Zoom level between 0 and 18.
void	centerOn (double longCenter, double latCenter)
	Centre map on long/lat.
void	centerUnderPt (juce::Point< double > world, juce::Point< int > view)
	Set world coordinate (longlat) under view coordinate (x/y)
OpenStreetMaps *	getOpenStreetMaps ()

Protected Member Functions
void	resized () override
void	paint (juce::Graphics &g) override
void	mouseDown (const juce::MouseEvent &e) override
void	mouseDrag (const juce::MouseEvent &e) override
void	mouseWheelMove (const juce::MouseEvent &e, const juce::MouseWheelDetails &wheel) override
void	tileFetched (int zoom, int x, int y) override
void	updateMap ()
void	mapUpdated ()

Detailed Description

Interactive map viewer component using OpenStreetMap tiles.

MapViewer displays an interactive map using tiles from OpenStreetMap servers. It supports panning, zooming (levels 0-18), and can be centered on any latitude/longitude coordinate. The component handles tile fetching, caching, and rendering automatically.

Key Features:

• Interactive panning via mouse drag
• Zoom levels 0-18 (world to street level)
• Mouse wheel zoom
• Automatic tile fetching and caching
• Smooth rendering with double buffering
• Center on any lat/long coordinate

Zoom Levels:

• 0-2: World view
• 3-6: Continent/country view
• 7-10: State/region view
• 11-14: City view
• 15-18: Street/building view

Usage:

MapViewer mapViewer;
mapViewer.setSize(800, 600);
 
// Center on London
mapViewer.centerOn(-0.1278, 51.5074); // longitude, latitude
mapViewer.setZoom(12); // City level zoom
 
// Or center on San Francisco
mapViewer.centerOn(-122.4194, 37.7749);
mapViewer.setZoom(13);

See also

OpenStreetMaps

Constructor & Destructor Documentation

MapViewer()

MapViewer::MapViewer

(

)

~MapViewer()

MapViewer::~MapViewer ( )

override

Member Function Documentation

setZoom()

void MapViewer::setZoom

(

int

zoom

)

Zoom level between 0 and 18.

centerOn()

void MapViewer::centerOn	(	double	longCenter,
		double	latCenter
	)

Centre map on long/lat.

centerUnderPt()

void MapViewer::centerUnderPt	(	juce::Point< double >	world,
		juce::Point< int >	view
	)

Set world coordinate (longlat) under view coordinate (x/y)

getOpenStreetMaps()

OpenStreetMaps * MapViewer::getOpenStreetMaps

(

)

resized()

void MapViewer::resized ( )

overrideprotected

paint()

void MapViewer::paint ( juce::Graphics &  g )

overrideprotected

mouseDown()

void MapViewer::mouseDown ( const juce::MouseEvent &  e )

overrideprotected

mouseDrag()

void MapViewer::mouseDrag ( const juce::MouseEvent &  e )

overrideprotected

mouseWheelMove()

void MapViewer::mouseWheelMove ( const juce::MouseEvent &  e, const juce::MouseWheelDetails &  wheel  )

overrideprotected

tileFetched()

void MapViewer::tileFetched ( int  zoom, int  x, int  y  )

overrideprotectedvirtual

Implements OpenStreetMaps::Listener.

updateMap()

void MapViewer::updateMap ( )

protected

mapUpdated()

void MapViewer::mapUpdated ( )

protected

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The documentation for this class was generated from the following file:

• gin_mapviewer.h