+<!-- ***** BEGIN LICENSE BLOCK *****
+ - Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ -
+ - The contents of this file are subject to the Mozilla Public License Version
+ - 1.1 (the "License"); you may not use this file except in compliance with
+ - the License. You may obtain a copy of the License at
+ - http://www.mozilla.org/MPL/
+ -
+ - Software distributed under the License is distributed on an "AS IS" basis,
+ - WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ - for the specific language governing rights and limitations under the
+ - License.
+ -
+ - The Original Code is Lantea mapping/tracking web app.
+ -
+ - The Initial Developer of the Original Code is
+ - Robert Kaiser <kairo@kairo.at>.
+ - Portions created by the Initial Developer are Copyright (C) 2011
+ - the Initial Developer. All Rights Reserved.
+ -
+ - Contributor(s):
+ - Robert Kaiser <kairo@kairo.at> (original author)
+ -
+ - Alternatively, the contents of this file may be used under the terms of
+ - either the GNU General Public License Version 2 or later (the "GPL"), or
+ - the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ - in which case the provisions of the GPL or the LGPL are applicable instead
+ - of those above. If you wish to allow use of your version of this file only
+ - under the terms of either the GPL or the LGPL, and not to allow others to
+ - use your version of this file under the terms of the MPL, indicate your
+ - decision by deleting the provisions above and replace them with the notice
+ - and other provisions required by the LGPL or the GPL. If you do not delete
+ - the provisions above, a recipient may use your version of this file under
+ - the terms of any one of the MPL, the GPL or the LGPL.
+ -
+ - ***** END LICENSE BLOCK ***** -->
+
<!DOCTYPE html>
<html manifest="manifest.appcache">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Lantea</title>
- <!-- script src="js/lantea.js"></script -->
- <!-- link rel="stylesheet" href="style/lantea.css" -->
+ <script src="js/map.js"></script>
+ <script src="js/ui.js"></script>
+ <link rel="stylesheet" href="style/lantea.css">
</head>
<body>
<h1>Lantea</h1>
+<canvas id="map" width="500" height="500">
+ Please use a browser that supports <canvas> elements.
+</canvas>
+
+<p id="copyright">Maps ©
+<a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors,
+<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a></p>
-</body></html>
\ No newline at end of file
+</body>
+</html>
\ No newline at end of file
--- /dev/null
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Lantea mapping/tracking web app.
+ *
+ * The Initial Developer of the Original Code is
+ * Robert Kaiser <kairo@kairo.at>.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Robert Kaiser <kairo@kairo.at>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+var gCanvas, gContext;
+
+var gTileSize = 256;
+var gMaxZoom = 18; // The minimum is 0.
+
+//drawMap();
+
+var gPos = {x: 35630000.0, // Current position in the map in pixels at the maximum zoom level (18)
+ y: 23670000.0, // The range is 0-67108864 (2^gMaxZoom * gTileSize)
+ z: 5.0}; // This can be fractional if we are between zoom levels.
+
+var gLastMouseX = 0;
+var gLastMouseY = 0;
+
+// Used as an assiciative array. They keys have to be strings, ours will be "xindex,yindex,zindex" e.g. "13,245,12".
+var gTiles = {};
+
+var gDragging = false;
+var gZoomTouchID;
+
+window.onload = function() {
+ gCanvas = document.getElementById("map");
+ gContext = gCanvas.getContext("2d");
+
+ gCanvas.addEventListener("mouseup", mapEvHandler, false);
+ gCanvas.addEventListener("mousemove", mapEvHandler, false);
+ gCanvas.addEventListener("mousedown", mapEvHandler, false);
+ gCanvas.addEventListener("mouseout", mapEvHandler, false);
+
+ gCanvas.addEventListener("touchstart", mapEvHandler, false);
+ gCanvas.addEventListener("touchmove", mapEvHandler, false);
+ gCanvas.addEventListener("touchend", mapEvHandler, false);
+ gCanvas.addEventListener("touchcancel", mapEvHandler, false);
+ gCanvas.addEventListener("touchleave", mapEvHandler, false);
+
+ gCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
+ gCanvas.addEventListener("mousewheel", mapEvHandler, false);
+
+ resizeAndDraw();
+}
+
+window.onresize = function() {
+ resizeAndDraw();
+}
+
+function resizeAndDraw() {
+ var viewportWidth = window.innerWidth;
+ var viewportHeight = window.innerHeight;
+
+ var canvasWidth = viewportWidth * 0.98;
+ var canvasHeight = (viewportHeight-110) * 0.98;
+ gCanvas.style.position = "fixed";
+ gCanvas.width = canvasWidth;
+ gCanvas.height = canvasHeight;
+ drawMap();
+}
+
+function zoomIn() {
+ if (gPos.z < gMaxZoom) {
+ gPos.z++;
+ drawMap();
+ }
+}
+
+function zoomOut() {
+ if (gPos.z > 0) {
+ gPos.z--;
+ drawMap();
+ }
+}
+
+// A sane mod function that works for negative numbers.
+// Returns a % b.
+function mod(a, b) {
+ return ((a % b) + b) % b;
+}
+
+function normaliseIndices(x, y, z) {
+ return {x: mod(x, Math.pow(2, z)),
+ y: mod(y, Math.pow(2, z)),
+ z: z};
+}
+
+function tileURL(x, y, z) {
+ var norm = normaliseIndices(x, y, z);
+ var url = "http://tile.openstreetmap.org/" + norm.z + "/" + norm.x + "/" + norm.y + ".png";
+ return url;
+}
+
+// Returns true if the tile is outside the current view.
+function isOutsideWindow(t) {
+ var pos = decodeIndex(t);
+ var x = pos[0];
+ var y = pos[1];
+ var z = pos[2];
+
+ var wid = gCanvas.width * Math.pow(2, gMaxZoom - z);
+ var ht = gCanvas.height * Math.pow(2, gMaxZoom - z);
+
+ x *= Math.pow(2, gMaxZoom - z);
+ y *= Math.pow(2, gMaxZoom - z);
+
+ var sz = gTileSize * Math.pow(2, gMaxZoom - z);
+ if (x > gPos.x + wid / 2 || y > gPos.y + ht / 2 ||
+ x + sz < gPos.x - wid / 2 || y - sz < gPos.y - ht / 2)
+ return true;
+ return false;
+}
+
+function encodeIndex(x, y, z) {
+ var norm = normaliseIndices(x, y, z);
+ return norm.x + "," + norm.y + "," + norm.z;
+}
+
+function decodeIndex(encodedIdx) {
+ return encodedIdx.split(",", 3);
+}
+
+function drawMap() {
+ // Go through all the currently loaded tiles. If we don't want any of them remove them.
+ // for (t in gTiles) {
+ // if (isOutsideWindow(t))
+ // delete gTiles[t];
+ // }
+ var z = Math.round(gPos.z);
+ var wid = gCanvas.width * Math.pow(2, gMaxZoom - z); // Width in level 18 pixels.
+ var ht = gCanvas.height * Math.pow(2, gMaxZoom - z); // Height in level 18 pixels.
+ var sz = gTileSize * Math.pow(2, gMaxZoom - z); // Tile size in level 18 pixels.
+
+ var xMin = gPos.x - wid / 2; // Corners of the window in level 18 pixels.
+ var yMin = gPos.y - ht / 2;
+ var xMax = gPos.x + wid / 2;
+ var yMax = gPos.y + ht / 2;
+
+ // Go through all the tiles we want. If any of them aren't loaded or being loaded, do so.
+ for (var x = Math.floor(xMin / sz); x < Math.ceil(xMax / sz); ++x) {
+ for (var y = Math.floor(yMin / sz); y < Math.ceil(yMax / sz); ++y) {
+ var xoff = (x * sz - xMin) / Math.pow(2, gMaxZoom - z);
+ var yoff = (y * sz - yMin) / Math.pow(2, gMaxZoom - z);
+ var tileKey = encodeIndex(x, y, z);
+ if (gTiles[tileKey] && gTiles[tileKey].complete) {
+ // Round here is **CRUICIAL** otherwise the images are filtered and the performance sucks (more than expected).
+ gContext.drawImage(gTiles[tileKey], Math.round(xoff), Math.round(yoff));
+ }
+ else {
+ if (!gTiles[tileKey]) {
+ gTiles[tileKey] = new Image();
+ gTiles[tileKey].src = tileURL(x, y, gPos.z);
+ gTiles[tileKey].onload = function() {
+ // TODO: Just render this tile where it should be.
+ // context.drawImage(gTiles[tileKey], Math.round(xoff), Math.round(yoff)); // Doesn't work for some reason.
+ drawMap();
+ }
+ }
+ gContext.fillStyle = "#ffffff";
+ gContext.fillRect(Math.round(xoff), Math.round(yoff), gTileSize, gTileSize);
+ }
+ }
+ }
+}
+
+var mapEvHandler = {
+ handleEvent: function(aEvent) {
+ var touchEvent = aEvent.type.indexOf('touch') != -1;
+
+ // Bail out on unwanted map moves, but not mousewheel events.
+ if (aEvent.type != "DOMMouseScroll" && aEvent.type != "mousewheel") {
+ // Bail out if this is neither a touch nor left-click.
+ if (!touchEvent && aEvent.button != 0)
+ return;
+
+ // Bail out if the started touch can't be found.
+ if (touchEvent && zoomstart &&
+ !aEvent.changedTouches.identifiedTouch(gZoomTouchID))
+ return;
+ }
+
+ var coordObj = touchEvent ?
+ aEvent.changedTouches.identifiedTouch(gZoomTouchID) :
+ aEvent;
+
+ switch (aEvent.type) {
+ case "mousedown":
+ case "touchstart":
+ if (touchEvent) {
+ zoomTouchID = aEvent.changedTouches.item(0).identifier;
+ coordObj = aEvent.changedTouches.identifiedTouch(gZoomTouchID);
+ }
+ var x = coordObj.clientX - gCanvas.offsetLeft;
+ var y = coordObj.clientY - gCanvas.offsetTop;
+ if (touchEvent || aEvent.button === 0) {
+ gDragging = true;
+ }
+ gLastMouseX = x;
+ gLastMouseY = y;
+ break;
+ case "mousemove":
+ case "touchmove":
+ var x = coordObj.clientX - gCanvas.offsetLeft;
+ var y = coordObj.clientY - gCanvas.offsetTop;
+ if (gDragging === true) {
+ var dX = x - gLastMouseX;
+ var dY = y - gLastMouseY;
+ gPos.x -= dX * Math.pow(2, gMaxZoom - gPos.z);
+ gPos.y -= dY * Math.pow(2, gMaxZoom - gPos.z);
+ drawMap();
+ }
+ gLastMouseX = x;
+ gLastMouseY = y;
+ break;
+ case "mouseup":
+ case "touchend":
+ gDragging = false;
+ break;
+ case "mouseout":
+ case "touchcancel":
+ case "touchleave":
+ //gDragging = false;
+ break;
+ case "DOMMouseScroll":
+ case "mousewheel":
+ var delta = 0;
+ if (aEvent.wheelDelta) {
+ delta = aEvent.wheelDelta / 120;
+ if (window.opera)
+ delta = -delta;
+ }
+ else if (aEvent.detail) {
+ delta = -aEvent.detail / 3;
+ }
+
+ if (delta > 0)
+ zoomIn();
+ else if (delta < 0)
+ zoomOut();
+ break;
+ }
+ }
+};
--- /dev/null
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Lantea mapping/tracking web app.
+ *
+ * The Initial Developer of the Original Code is
+ * Robert Kaiser <kairo@kairo.at>.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Robert Kaiser <kairo@kairo.at>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+body {
+ font-family: sans-serif;
+}
+
+#copyright {
+ position: absolute;
+ bottom: .5em;
+ right: .5em;
+ margin: 0;
+ font-size: small;
+ opacity: .5;
+}
projects / lantea.git / commitdiff