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L.Control.MiniMap = L.Control.extend({
options: {
position: 'bottomright',
toggleDisplay: false,
zoomLevelOffset: -5,
zoomLevelFixed: false,
zoomAnimation: false,
autoToggleDisplay: false,
width: 150,
height: 150,
aimingRectOptions: { color: "#ff7800", weight: 1, clickable: false },
shadowRectOptions: { color: "#000000", weight: 1, clickable: false, opacity: 0, fillOpacity: 0 }
},
hideText: 'Hide MiniMap',
showText: 'Show MiniMap',
//layer is the map layer to be shown in the minimap
initialize: function(layer, options) {
L.Util.setOptions(this, options);
//Make sure the aiming rects are non-clickable even if the user tries to set them clickable (most likely by forgetting to specify them false)
this.options.aimingRectOptions.clickable = false;
this.options.shadowRectOptions.clickable = false;
this._layer = layer;
},
onAdd: function(map) {
this._mainMap = map;
//Creating the container and stopping events from spilling through to the main map.
this._container = L.DomUtil.create('div', 'leaflet-control-minimap');
this._container.style.width = this.options.width + 'px';
this._container.style.height = this.options.height + 'px';
L.DomEvent.disableClickPropagation(this._container);
L.DomEvent.on(this._container, 'mousewheel', L.DomEvent.stopPropagation);
this._miniMap = new L.Map(this._container,
{
attributionControl: false,
zoomControl: false,
zoomAnimation: this.options.zoomAnimation,
autoToggleDisplay: this.options.autoToggleDisplay,
touchZoom: !this.options.zoomLevelFixed,
scrollWheelZoom: !this.options.zoomLevelFixed,
doubleClickZoom: !this.options.zoomLevelFixed,
boxZoom: !this.options.zoomLevelFixed,
crs: map.options.crs
});
this._miniMap.addLayer(this._layer);
//These bools are used to prevent infinite loops of the two maps notifying each other that they've moved.
this._mainMapMoving = false;
this._miniMapMoving = false;
//Keep a record of this to prevent auto toggling when the user explicitly doesn't want it.
this._userToggledDisplay = false;
this._minimized = false;
if (this.options.toggleDisplay) {
this._addToggleButton();
}
this._miniMap.whenReady(L.Util.bind(function() {
this._aimingRect = L.rectangle(this._mainMap.getBounds(), this.options.aimingRectOptions).addTo(this._miniMap);
this._shadowRect = L.rectangle(this._mainMap.getBounds(), this.options.shadowRectOptions).addTo(this._miniMap);
this._mainMap.on('moveend', this._onMainMapMoved, this);
this._mainMap.on('move', this._onMainMapMoving, this);
this._miniMap.on('movestart', this._onMiniMapMoveStarted, this);
this._miniMap.on('move', this._onMiniMapMoving, this);
this._miniMap.on('moveend', this._onMiniMapMoved, this);
}, this));
return this._container;
},
addTo: function(map) {
L.Control.prototype.addTo.call(this, map);
this._miniMap.setView(this._mainMap.getCenter(), this._decideZoom(true));
this._setDisplay(this._decideMinimized());
return this;
},
onRemove: function(map) {
this._mainMap.off('moveend', this._onMainMapMoved, this);
this._mainMap.off('move', this._onMainMapMoving, this);
this._miniMap.off('moveend', this._onMiniMapMoved, this);
this._miniMap.removeLayer(this._layer);
},
_addToggleButton: function() {
this._toggleDisplayButton = this.options.toggleDisplay ? this._createButton(
'', this.hideText, 'leaflet-control-minimap-toggle-display', this._container, this._toggleDisplayButtonClicked, this) : undefined;
},
_createButton: function(html, title, className, container, fn, context) {
var link = L.DomUtil.create('a', className, container);
link.innerHTML = html;
link.href = '#';
link.title = title;
var stop = L.DomEvent.stopPropagation;
L.DomEvent
.on(link, 'click', stop)
.on(link, 'mousedown', stop)
.on(link, 'dblclick', stop)
.on(link, 'click', L.DomEvent.preventDefault)
.on(link, 'click', fn, context);
return link;
},
_toggleDisplayButtonClicked: function() {
this._userToggledDisplay = true;
if (!this._minimized) {
this._minimize();
this._toggleDisplayButton.title = this.showText;
}
else {
this._restore();
this._toggleDisplayButton.title = this.hideText;
}
},
_setDisplay: function(minimize) {
if (minimize != this._minimized) {
if (!this._minimized) {
this._minimize();
}
else {
this._restore();
}
}
},
_minimize: function() {
// hide the minimap
if (this.options.toggleDisplay) {
this._container.style.width = '19px';
this._container.style.height = '19px';
this._toggleDisplayButton.className += ' minimized';
}
else {
this._container.style.display = 'none';
}
this._minimized = true;
},
_restore: function() {
if (this.options.toggleDisplay) {
this._container.style.width = this.options.width + 'px';
this._container.style.height = this.options.height + 'px';
this._toggleDisplayButton.className = this._toggleDisplayButton.className
.replace(/(?:^|\s)minimized(?!\S)/g, '');
}
else {
this._container.style.display = 'block';
}
this._minimized = false;
},
_onMainMapMoved: function(e) {
if (!this._miniMapMoving) {
this._mainMapMoving = true;
this._miniMap.setView(this._mainMap.getCenter(), this._decideZoom(true));
this._setDisplay(this._decideMinimized());
} else {
this._miniMapMoving = false;
}
this._aimingRect.setBounds(this._mainMap.getBounds());
},
_onMainMapMoving: function(e) {
this._aimingRect.setBounds(this._mainMap.getBounds());
},
_onMiniMapMoveStarted: function(e) {
var lastAimingRect = this._aimingRect.getBounds();
var sw = this._miniMap.latLngToContainerPoint(lastAimingRect.getSouthWest());
var ne = this._miniMap.latLngToContainerPoint(lastAimingRect.getNorthEast());
this._lastAimingRectPosition = { sw: sw, ne: ne };
},
_onMiniMapMoving: function(e) {
if (!this._mainMapMoving && this._lastAimingRectPosition) {
this._shadowRect.setBounds(new L.LatLngBounds(this._miniMap.containerPointToLatLng(this._lastAimingRectPosition.sw), this._miniMap.containerPointToLatLng(this._lastAimingRectPosition.ne)));
this._shadowRect.setStyle({ opacity: 1, fillOpacity: 0.3 });
}
},
_onMiniMapMoved: function(e) {
if (!this._mainMapMoving) {
this._miniMapMoving = true;
this._mainMap.setView(this._miniMap.getCenter(), this._decideZoom(false));
this._shadowRect.setStyle({ opacity: 0, fillOpacity: 0 });
} else {
this._mainMapMoving = false;
}
},
_decideZoom: function(fromMaintoMini) {
if (!this.options.zoomLevelFixed) {
if (fromMaintoMini)
return this._mainMap.getZoom() + this.options.zoomLevelOffset;
else {
var currentDiff = this._miniMap.getZoom() - this._mainMap.getZoom();
var proposedZoom = this._miniMap.getZoom() - this.options.zoomLevelOffset;
var toRet;
if (currentDiff > this.options.zoomLevelOffset && this._mainMap.getZoom() < this._miniMap.getMinZoom() - this.options.zoomLevelOffset) {
//This means the miniMap is zoomed out to the minimum zoom level and can't zoom any more.
if (this._miniMap.getZoom() > this._lastMiniMapZoom) {
//This means the user is trying to zoom in by using the minimap, zoom the main map.
toRet = this._mainMap.getZoom() + 1;
//Also we cheat and zoom the minimap out again to keep it visually consistent.
this._miniMap.setZoom(this._miniMap.getZoom() - 1);
} else {
//Either the user is trying to zoom out past the mini map's min zoom or has just panned using it, we can't tell the difference.
//Therefore, we ignore it!
toRet = this._mainMap.getZoom();
}
} else {
//This is what happens in the majority of cases, and always if you configure the min levels + offset in a sane fashion.
toRet = proposedZoom;
}
this._lastMiniMapZoom = this._miniMap.getZoom();
return toRet;
}
} else {
if (fromMaintoMini)
return this.options.zoomLevelFixed;
else
return this._mainMap.getZoom();
}
},
_decideMinimized: function() {
if (this._userToggledDisplay) {
return this._minimized;
}
if (this.options.autoToggleDisplay) {
if (this._mainMap.getBounds().contains(this._miniMap.getBounds())) {
return true;
}
return false;
}
return this._minimized;
}
});
L.Map.mergeOptions({
miniMapControl: false
});
L.Map.addInitHook(function() {
if (this.options.miniMapControl) {
this.miniMapControl = (new L.Control.MiniMap()).addTo(this);
}
});
L.control.minimap = function(options) {
return new L.Control.MiniMap(options);
};
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