var gDragging = false;
var gDragTouchID, gPinchStartWidth;
-var gGeoWatchID;
+var gGeoWatchID, gGPSWakeLock;
var gTrack = [];
var gLastTrackPoint, gLastDrawnPoint;
+var gDrawing = false;
var gCenterPosition = true;
var gCurPosMapCache;
}
function drawTrack() {
+ if (gDrawing) { return; }
+ gDrawing = true;
if (gTrackContext && (document.hidden != true)) { // Only draw if we're actually visible.
gLastDrawnPoint = null;
gCurPosMapCache = undefined;
}
}
}
+ gDrawing = false;
}
-function drawTrackPoint(aLatitude, aLongitude, lastPoint) {
- var trackpoint = gps2xy(aLatitude, aLongitude);
+function drawTrackPoint(aLatitude, aLongitude, aLastPoint) {
+ var trackpoint = {"worldpos": gps2xy(aLatitude, aLongitude)};
+ var update_drawnpoint = true;
// lastPoint is for optimizing (not actually executing the draw until the last)
- trackpoint.optimized = (lastPoint === false);
- var mappos = {x: Math.round((trackpoint.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2),
- y: Math.round((trackpoint.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)};
-
+ trackpoint.segmentEnd = (aLastPoint === true);
+ trackpoint.optimized = (aLastPoint === false);
+ trackpoint.mappos = {x: Math.round((trackpoint.worldpos.x - gMap.pos.x) / gMap.zoomFactor + gMap.width / 2),
+ y: Math.round((trackpoint.worldpos.y - gMap.pos.y) / gMap.zoomFactor + gMap.height / 2)};
+ trackpoint.skip_drawing = false;
+ if (gLastDrawnPoint) {
+ // Lines completely outside the current display should not be drawn.
+ if ((trackpoint.mappos.x < 0 && gLastDrawnPoint.mappos.x < 0) ||
+ (trackpoint.mappos.x > gMap.width && gLastDrawnPoint.mappos.x > gMap.width) ||
+ (trackpoint.mappos.y < 0 && gLastDrawnPoint.mappos.y < 0) ||
+ (trackpoint.mappos.y > gMap.height && gLastDrawnPoint.mappos.y > gMap.height)) {
+ trackpoint.skip_drawing = true;
+ }
+ }
if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
gTrackContext.strokeStyle = gTrackColor;
gTrackContext.fillStyle = gTrackContext.strokeStyle;
gTrackContext.lineJoin = "round";
}
// This breaks optimiziation, so make sure to reset optimization.
- if (!gLastDrawnPoint || gLastDrawnPoint == trackpoint) {
+ if (trackpoint.skip_drawing || !gLastDrawnPoint) {
trackpoint.optimized = false;
// Close path if one was open.
if (gLastDrawnPoint && gLastDrawnPoint.optimized) {
gTrackContext.stroke();
}
}
- if (!gLastDrawnPoint || (gLastDrawnPoint == trackpoint) || !gLastDrawnPoint.optimized) {
- // Start drawing a segment.
- gTrackContext.beginPath();
- gTrackContext.arc(mappos.x, mappos.y,
- gTrackContext.lineWidth, 0, Math.PI * 2, false);
- gTrackContext.fill();
+ if (!trackpoint.skip_drawing) {
+ if (gLastDrawnPoint && gLastDrawnPoint.skip_drawing && !gLastDrawnPoint.segmentEnd) {
+ // If the last point was skipped but the current one isn't, draw a segment start
+ // for the off-screen previous one as well as a connection line.
+ gTrackContext.beginPath();
+ gTrackContext.arc(gLastDrawnPoint.mappos.x, gLastDrawnPoint.mappos.y,
+ gTrackContext.lineWidth, 0, Math.PI * 2, false);
+ gTrackContext.fill();
+ gTrackContext.lineTo(trackpoint.mappos.x, trackpoint.mappos.y);
+ }
+ else if (!gLastDrawnPoint || !gLastDrawnPoint.optimized) {
+ // Start drawing a segment with the current point.
+ gTrackContext.beginPath();
+ gTrackContext.arc(trackpoint.mappos.x, trackpoint.mappos.y,
+ gTrackContext.lineWidth, 0, Math.PI * 2, false);
+ gTrackContext.fill();
+ }
+ else if (!trackpoint.segmentEnd && gLastDrawnPoint &&
+ (Math.abs(gLastDrawnPoint.mappos.x - trackpoint.mappos.x) <= 1) &&
+ (Math.abs(gLastDrawnPoint.mappos.y - trackpoint.mappos.y) <= 1)) {
+ // We would draw the same or almost the same point, don't do any actual drawing.
+ update_drawnpoint = false;
+ }
+ else {
+ // Continue drawing segment, close if needed.
+ gTrackContext.lineTo(trackpoint.mappos.x, trackpoint.mappos.y);
+ if (!trackpoint.optimized)
+ gTrackContext.stroke();
+ }
}
- else {
- // Continue drawing segment, close if needed.
- gTrackContext.lineTo(mappos.x, mappos.y);
- if (!trackpoint.optimized)
- gTrackContext.stroke();
+ if (update_drawnpoint) {
+ gLastDrawnPoint = trackpoint;
}
- gLastDrawnPoint = trackpoint;
}
function drawCurrentLocation(trackPoint) {
// Bail out if the started touch can't be found.
if (touchEvent && gDragging &&
- !aEvent.changedTouches.identifiedTouch(gDragTouchID))
+ !aEvent.targetTouches.item(0))
return;
}
var coordObj = touchEvent ?
- aEvent.changedTouches.identifiedTouch(gDragTouchID) :
+ aEvent.targetTouches.item(0) :
aEvent;
switch (aEvent.type) {
aEvent.targetTouches.item(0).clientY, 2)
);
}
- gDragTouchID = aEvent.changedTouches.item(0).identifier;
- coordObj = aEvent.changedTouches.identifiedTouch(gDragTouchID);
+ coordObj = aEvent.targetTouches.item(0);
}
var x = coordObj.clientX - gGLMapCanvas.offsetLeft;
var y = coordObj.clientY - gGLMapCanvas.offsetTop;
if (gGeolocation) {
gActionLabel.textContent = "Establishing Position";
gAction.style.display = "block";
+ if (navigator.requestWakeLock) {
+ gGPSWakeLock = navigator.requestWakeLock("gps");
+ }
gGeoWatchID = gGeolocation.watchPosition(
function(position) {
if (gActionLabel.textContent) {
gActionLabel.textContent = "";
gAction.style.display = "none";
}
+ if (navigator.requestWakeLock && gGPSWakeLock) {
+ console.log("releasing WakeLock");
+ gGPSWakeLock.unlock();
+ }
if (gGeoWatchID) {
gGeolocation.clearWatch(gGeoWatchID);
}
drawTrack();
}
+function loadTrack(aTrackId) {
+ fetchBackend("track_json?id=" + encodeURIComponent(aTrackId), "GET", null,
+ function(aResult, aStatusCode) {
+ if (aStatusCode >= 400 || !aResult) {
+ console.log("loading track failed: " + aStatusCode + ", result: " + aResult.message);
+ }
+ else {
+ console.log("loading track with " + aResult.length + " points.");
+ gTrack = aResult;
+ for (var i = 0; i < gTrack.length; i++) {
+ try { gTrackStore.push(gTrack[i]); } catch(e) {}
+ }
+ drawTrack();
+ }
+ }
+ );
+}
+
var gTileService = {
objStore: "tilecache",