| /* Flot plugin for showing crosshairs when the mouse hovers over the plot. |
| |
| Copyright (c) 2007-2013 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(e){function n(e){function n(n){if(t.locked)return;t.x!=-1&&(t.x=-1,e.triggerRedrawOverlay())}function r(n){if(t.locked)return;if(e.getSelection&&e.getSelection()){t.x=-1;return}var r=e.offset();t.x=Math.max(0,Math.min(n.pageX-r.left,e.width())),t.y=Math.max(0,Math.min(n.pageY-r.top,e.height())),e.triggerRedrawOverlay()}var t={x:-1,y:-1,locked:!1};e.setCrosshair=function(r){if(!r)t.x=-1;else{var i=e.p2c(r);t.x=Math.max(0,Math.min(i.left,e.width())),t.y=Math.max(0,Math.min(i.top,e.height()))}e.triggerRedrawOverlay()},e.clearCrosshair=e.setCrosshair,e.lockCrosshair=function(r){r&&e.setCrosshair(r),t.locked=!0},e.unlockCrosshair=function(){t.locked=!1},e.hooks.bindEvents.push(function(e,t){if(!e.getOptions().crosshair.mode)return;t.mouseout(n),t.mousemove(r)}),e.hooks.drawOverlay.push(function(e,n){var r=e.getOptions().crosshair;if(!r.mode)return;var i=e.getPlotOffset();n.save(),n.translate(i.left,i.top);if(t.x!=-1){var s=e.getOptions().crosshair.lineWidth%2===0?0:.5;n.strokeStyle=r.color,n.lineWidth=r.lineWidth,n.lineJoin="round",n.beginPath();if(r.mode.indexOf("x")!=-1){var o=Math.round(t.x)+s;n.moveTo(o,0),n.lineTo(o,e.height())}if(r.mode.indexOf("y")!=-1){var u=Math.round(t.y)+s;n.moveTo(0,u),n.lineTo(e.width(),u)}n.stroke()}n.restore()}),e.hooks.shutdown.push(function(e,t){t.unbind("mouseout",n),t.unbind("mousemove",r)})}var t={crosshair:{mode:null,color:"rgba(170, 0, 0, 0.80)",lineWidth:1}};e.plot.plugins.push({init:n,options:t,name:"crosshair",version:"1.0"})})(jQuery); |