Add jquery and flot to catapult/third_party.

third_party/flot/jquery.flot.crosshair.js

+/* Flot plugin for showing crosshairs when the mouse hovers over the plot.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+The plugin supports these options:
+
+        crosshair: {
+                mode: null or "x" or "y" or "xy"
+                color: color
+                lineWidth: number
+        }
+
+Set the mode to one of "x", "y" or "xy". The "x" mode enables a vertical
+crosshair that lets you trace the values on the x axis, "y" enables a
+horizontal crosshair and "xy" enables them both. "color" is the color of the
+crosshair (default is "rgba(170, 0, 0, 0.80)"), "lineWidth" is the width of
+the drawn lines (default is 1).
+
+The plugin also adds four public methods:
+
+  - setCrosshair( pos )
+
+    Set the position of the crosshair. Note that this is cleared if the user
+    moves the mouse. "pos" is in coordinates of the plot and should be on the
+    form { x: xpos, y: ypos } (you can use x2/x3/... if you're using multiple
+    axes), which is coincidentally the same format as what you get from a
+    "plothover" event. If "pos" is null, the crosshair is cleared.
+
+  - clearCrosshair()
+
+    Clear the crosshair.
+
+  - lockCrosshair(pos)
+
+    Cause the crosshair to lock to the current location, no longer updating if
+    the user moves the mouse. Optionally supply a position (passed on to
+    setCrosshair()) to move it to.
+
+    Example usage:
+
+        var myFlot = $.plot( $("#graph"), ..., { crosshair: { mode: "x" } } };
+        $("#graph").bind( "plothover", function ( evt, position, item ) {
+                if ( item ) {
+                        // Lock the crosshair to the data point being hovered
+                        myFlot.lockCrosshair({
+                                x: item.datapoint[ 0 ],
+                                y: item.datapoint[ 1 ]
+                        });
+                } else {
+                        // Return normal crosshair operation
+                        myFlot.unlockCrosshair();
+                }
+        });
+
+  - unlockCrosshair()
+
+    Free the crosshair to move again after locking it.
+*/
+
+(function ($) {
+    var options = {
+        crosshair: {
+            mode: null, // one of null, "x", "y" or "xy",
+            color: "rgba(170, 0, 0, 0.80)",
+            lineWidth: 1
+        }
+    };
+    
+    function init(plot) {
+        // position of crosshair in pixels
+        var crosshair = { x: -1, y: -1, locked: false };
+
+        plot.setCrosshair = function setCrosshair(pos) {
+            if (!pos)
+                crosshair.x = -1;
+            else {
+                var o = plot.p2c(pos);
+                crosshair.x = Math.max(0, Math.min(o.left, plot.width()));
+                crosshair.y = Math.max(0, Math.min(o.top, plot.height()));
+            }
+            
+            plot.triggerRedrawOverlay();
+        };
+        
+        plot.clearCrosshair = plot.setCrosshair; // passes null for pos
+        
+        plot.lockCrosshair = function lockCrosshair(pos) {
+            if (pos)
+                plot.setCrosshair(pos);
+            crosshair.locked = true;
+        };
+
+        plot.unlockCrosshair = function unlockCrosshair() {
+            crosshair.locked = false;
+        };
+
+        function onMouseOut(e) {
+            if (crosshair.locked)
+                return;
+
+            if (crosshair.x != -1) {
+                crosshair.x = -1;
+                plot.triggerRedrawOverlay();
+            }
+        }
+
+        function onMouseMove(e) {
+            if (crosshair.locked)
+                return;
+                
+            if (plot.getSelection && plot.getSelection()) {
+                crosshair.x = -1; // hide the crosshair while selecting
+                return;
+            }
+                
+            var offset = plot.offset();
+            crosshair.x = Math.max(0, Math.min(e.pageX - offset.left, plot.width()));
+            crosshair.y = Math.max(0, Math.min(e.pageY - offset.top, plot.height()));
+            plot.triggerRedrawOverlay();
+        }
+        
+        plot.hooks.bindEvents.push(function (plot, eventHolder) {
+            if (!plot.getOptions().crosshair.mode)
+                return;
+
+            eventHolder.mouseout(onMouseOut);
+            eventHolder.mousemove(onMouseMove);
+        });
+
+        plot.hooks.drawOverlay.push(function (plot, ctx) {
+            var c = plot.getOptions().crosshair;
+            if (!c.mode)
+                return;
+
+            var plotOffset = plot.getPlotOffset();
+            
+            ctx.save();
+            ctx.translate(plotOffset.left, plotOffset.top);
+
+            if (crosshair.x != -1) {
+                var adj = plot.getOptions().crosshair.lineWidth % 2 ? 0.5 : 0;
+
+                ctx.strokeStyle = c.color;
+                ctx.lineWidth = c.lineWidth;
+                ctx.lineJoin = "round";
+
+                ctx.beginPath();
+                if (c.mode.indexOf("x") != -1) {
+                    var drawX = Math.floor(crosshair.x) + adj;
+                    ctx.moveTo(drawX, 0);
+                    ctx.lineTo(drawX, plot.height());
+                }
+                if (c.mode.indexOf("y") != -1) {
+                    var drawY = Math.floor(crosshair.y) + adj;
+                    ctx.moveTo(0, drawY);
+                    ctx.lineTo(plot.width(), drawY);
+                }
+                ctx.stroke();
+            }
+            ctx.restore();
+        });
+
+        plot.hooks.shutdown.push(function (plot, eventHolder) {
+            eventHolder.unbind("mouseout", onMouseOut);
+            eventHolder.unbind("mousemove", onMouseMove);
+        });
+    }
+    
+    $.plot.plugins.push({
+        init: init,
+        options: options,
+        name: 'crosshair',
+        version: '1.0'
+    });
+})(jQuery);