Add files to support barogram display.

barogram.js

@@ -0,0 +1,186 @@
+/*
+   ____                      _____ _ _     _             _   _      _                      _    
+  / __ \                    / ____| (_)   | |           | \ | |    | |                    | |   
+ | |  | |_ __   ___ _ __   | |  __| |_  __| | ___ _ __  |  \| | ___| |___      _____  _ __| | __
+ | |  | | '_ \ / _ \ '_ \  | | |_ | | |/ _` |/ _ \ '__| | . ` |/ _ \ __\ \ /\ / / _ \| '__| |/ /
+ | |__| | |_) |  __/ | | | | |__| | | | (_| |  __/ |    | |\  |  __/ |_ \ V  V / (_) | |  |   < 
+  \____/| .__/ \___|_| |_|  \_____|_|_|\__,_|\___|_|    |_| \_|\___|\__| \_/\_/ \___/|_|  |_|\_\
+        | |                                                                                     
+        |_|                                                                                     
+*/
+// barogram option
+var baroCanvas;
+var baroScale;
+var baroMarker;
+var baroCtx;
+var baroScaleCtx;
+var baroMarkCtx;
+var X_max;
+var X_min;
+var Y_max;
+var Y_min;
+var xScale;
+var yScale;
+var xWidth;
+var yHeight;
+var xAxis = [];   // optional scale labels
+var yAxis = [];   // optional scale labels
+var margin = 10;  // all around line graph
+var X_legend = 0;
+var Y_legend = 0;
+var maxAlt = 5000;
+var X_lines = 5+1;
+var	Y_lines = 5+1;
+var currentUnit = "";
+var scaleFlag = 0;
+var X_offset = 0;
+var Y_offset = margin+X_legend;
+
+// show altitude scale on the graph
+function plotScale() {
+//    var TxtWidth = baroCtx.measureText(xAxis[0]).width;
+//    var TxtHeight = baroCtx.measureText(xAxis[0]).height;
+    var TxtHeight = 10;
+	baroScaleCtx.strokeStyle="#c0c0c0"; // color of axis text
+	baroScaleCtx.beginPath();
+    // print parameters on X axis
+	if (xAxis.length == X_lines) {
+	  for (i=0;i<X_lines;i++) {
+		var x = i * xWidth / (X_lines-1);
+//		baroScaleCtx.fillText(xAxis[i], x+margin-TxtWidth/2, margin+TxtHeight);
+		baroScaleCtx.fillText(xAxis[i], x+margin, margin);
+	  }	
+	}
+   // print parameters on Y axis
+    var yStep = yHeight / (Y_lines-1);
+    var yScaleStep = (Y_max - Y_min) / (Y_lines-1);
+	for (i=0;i<Y_lines;i++) {
+	  baroScaleCtx.fillText(Math.round(Y_max - (i * yScaleStep)), margin, (i * yStep) + margin+X_legend+TxtHeight/2);
+	}
+	baroScaleCtx.stroke();
+}
+
+// show grid lines on the graph
+function plotGrid() {
+	baroCtx.strokeStyle="#808080"; // color of grid lines
+	baroCtx.beginPath();
+	for (i=0;i<=X_lines;i++) {
+		var x = i * xWidth / (X_lines-1);
+		baroCtx.moveTo(x, margin+X_legend);
+		baroCtx.lineTo(x, yHeight+margin+X_legend);
+	}
+	for (i=0;i<=Y_lines;i++) {
+		var y = i * yHeight / (Y_lines-1) + margin+X_legend; 
+		baroCtx.moveTo(0, y)
+		baroCtx.lineTo(xWidth,y)
+	}
+	baroCtx.stroke();
+
+//  //avoid redrawing the grid every time - set the dynamic image as the background
+//	var imageDataURL = baroCanvas.toDataURL();
+//    baroCanvas.style.background = imageDataURL; // no work
+//    $("#div_baro").css("background-image","url(imageDataURL)"); // no work either
+}
+
+function baro_Init() {
+	X_max = "12:00:00".toSeconds();
+	X_min = "11:00:00".toSeconds();
+	Y_max = maxAlt;
+	Y_min = 0;
+
+	baroCanvas = document.getElementById("div_baro");
+	baroCtx = baroCanvas.getContext("2d");
+	baroCtx.fillStyle = "#808080";  // color of text
+	baroCtx.font = "12px Arial";
+
+	baroScale = document.getElementById("div_baroScale");
+	baroScaleCtx = baroScale.getContext("2d");
+	baroScaleCtx.fillStyle = "#808080";  // color of text
+	baroScaleCtx.font = "12px Arial";
+
+	baroMarker = document.getElementById("div_baroMark");
+	baroMarkCtx = baroMarker.getContext("2d");
+	baroMarkCtx.fillStyle = "#808080";  // color of text
+	baroMarkCtx.font = "12px Arial";
+
+	xWidth = baroCanvas.width;
+	yHeight = baroCanvas.height - X_legend - 2*margin;
+
+	yScale = (yHeight) / (Y_max - Y_min);
+	xScale = (xWidth) / (X_max - X_min);
+
+    plotScale();
+	plotGrid();
+
+    // create a clipping region - simpler than checking X_min
+//	baroCtx.beginPath();
+//    baroCtx.rect(0, margin+X_legend, 0+xWidth, margin+X_legend+yHeight);
+//    baroCtx.clip();
+}
+String.prototype.toSeconds = function () { if (!this) return null; var hms = this.split(':'); return (+hms[0]) * 60 * 60 + (+hms[1]) * 60 + (+hms[2] || 0); }
+
+// plot a line with color and [x,y] array - rely on clipping region
+function baro_plotData(dCn,dColor,dataSet) {
+  if (dataSet.length > 1) {
+    // plot the altitude data
+    baroCtx.strokeStyle=dColor; // color of line
+    baroCtx.beginPath();
+	baroCtx.moveTo((dataSet[0][0]-X_min) * xScale + X_offset, yHeight-(dataSet[0][1] * yScale) + Y_offset);
+    for (i=1 ;i<dataSet.length;i++) {
+	  baroCtx.lineTo((dataSet[i][0]-X_min) * xScale + X_offset, yHeight -(dataSet[i][1] * yScale) + Y_offset);
+    }
+    baroCtx.stroke();
+
+	// plot the markers 
+	baroMarkCtx.fillStyle = dColor;  // color of text
+    baroMarkCtx.beginPath();
+	baroMarkCtx.fillText(dCn, 0, yHeight -(dataSet[dataSet.length-1][1] * yScale) + Y_offset);
+    baroMarkCtx.stroke();
+  }
+}
+
+function baro_plotRefresh() {
+xWidth = baroCanvas.width;
+yHeight = baroCanvas.height - X_legend - 2*margin;
+  // update the time scale
+  X_min = X_max - (pathl>60 ? 900 : pathl*10); // 5, 10 else 15 minutes
+  xScale = (xWidth) / (X_max - X_min);
+  // update the altitude scale
+  var maxRange = maxAlt * m2ft[unit];
+  // auto adjust the range
+//  (unit == "i") ? maxRange = Math.ceil((maxRange+250)/2000)*2000 : maxRange = Math.ceil((maxRange+100)/1000)*1000; // 2000 ft or 1000 m increments
+  (unit == "i") ? maxRange = Math.ceil((maxRange+500)/1000)*1000 : maxRange = Math.ceil((maxRange+250)/500)*500; // 1000 ft or 500 m increments
+  if ((maxRange != Y_max) || (unit != currentUnit)) {
+    currentUnit = unit;
+    Y_max = maxRange;
+    yScale = (yHeight) / (Y_max - Y_min) * m2ft[unit]; // adjust scale with unit here to avoid and extra multiply every y point
+	// auto adjust the grid spacing
+//    (unit == "i") ? Y_lines = (Y_max / 1000) + 1 : Y_lines = (Y_max / 500) + 1; // 1000 ft or 500 m grid steps
+    (unit == "i") ? Y_lines = (Y_max / 1000) + 1 : Y_lines = (Y_max / 250) + 1; // 1000 ft or 250 m grid steps
+    baroScaleCtx.clearRect(0, 0, baroScale.width, baroScale.height);
+	plotScale();
+  }
+  // erase the plot (and grid)
+//  baroCtx.clearRect(0, margin+X_legend, margin+X_legend+xWidth, margin+X_legend+yHeight);
+  baroCtx.clearRect(0, 0, baroCanvas.width, baroCanvas.height);
+  plotGrid(); // re-plot the grid
+  // erase the markers
+  baroMarkCtx.clearRect(0, 0, baroMarker.width, baroMarker.height);
+  // reset the flag
+  scaleFlag = 0;
+}
+
+// set the time and altitude scales on the barogram
+function Set_XY_Scale(tim,alt) {
+	if (scaleFlag++ == 0) {   // use first item as a reference
+	  X_max = tim.toSeconds();
+	  maxAlt = +alt; // '+' used for conversion from string to integer
+	} else {
+	  if (X_max < tim.toSeconds()) {
+  	    X_max = tim.toSeconds();
+	  }
+	  if (maxAlt < +alt) {
+	    maxAlt = +alt;
+	  }
+	}
+}

horizZoomControl.js

@@ -0,0 +1,54 @@
+
+/*
+ * The ZoomControl adds horizontal [+/-] buttons for the map
+ * to replace the standard vertical one
+ */
+
+function ZoomControl(controlDiv, map) {
+
+  // Creating divs & styles for custom zoom control
+  controlDiv.style.padding = '10px';
+
+  // Set CSS for the control wrapper
+  var controlWrapper = document.createElement('div');
+  controlWrapper.style.cursor = 'pointer';
+  controlWrapper.style.width = '56px'; 
+  controlWrapper.style.height = '28px';
+  controlWrapper.style.backgroundImage = 'url("horizZoom.png")';
+  controlDiv.appendChild(controlWrapper);
+
+  // Set CSS for the zoomIn
+  var zoomInButton = document.createElement('div');
+  zoomInButton.style.float = "left";
+  zoomInButton.style.width = '28px'; 
+  zoomInButton.style.height = '28px';
+  controlWrapper.appendChild(zoomInButton);
+
+  // Set CSS for the zoomOut
+  var zoomOutButton = document.createElement('div');
+  zoomOutButton.style.float = "left";
+  zoomOutButton.style.width = '28px'; 
+  zoomOutButton.style.height = '28px';
+  controlWrapper.appendChild(zoomOutButton);
+
+  // Setup the click event listener - zoomIn
+  google.maps.event.addDomListener(zoomInButton, 'click', function() {
+    map.setZoom(map.getZoom() + 1);
+  });
+
+  // Setup the click event listener - zoomOut
+  google.maps.event.addDomListener(zoomOutButton, 'click', function() {
+    map.setZoom(map.getZoom() - 1);
+  });  
+
+}
+
+function horizZoomControl_initialize() {
+  // Create the DIV to hold the control and call the ZoomControl() constructor
+  // passing in this DIV.
+  var zoomControlDiv = document.createElement('div');
+  var zoomControl = new ZoomControl(zoomControlDiv, map);
+
+  zoomControlDiv.index = 1;
+  map.controls[google.maps.ControlPosition.TOP_CENTER].push(zoomControlDiv);
+}