projects / dygraphs.git / blame
| Commit | Line | Data |
|---|---|---|
| 54425b14 | 1 | <!DOCTYPE html> |
| e7746234 EC |
2 | <html> |
| 3 | <head> | |
| 10494b48 | 4 | <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9"> |
| e7746234 EC |
5 | <title>Custom underlay callback</title> |
| 6 | <!--[if IE]> | |
| a2b2c3a1 | 7 | <script type="text/javascript" src="../excanvas.js"></script> |
| e7746234 | 8 | <![endif]--> |
| 7e5ddc94 DV |
9 | <!-- |
| 10 | For production (minified) code, use: | |
| 11 | <script type="text/javascript" src="dygraph-combined.js"></script> | |
| 12 | --> | |
| 13 | <script type="text/javascript" src="../dygraph-dev.js"></script> | |
| 14 | ||
| e7746234 EC |
15 | <script type="text/javascript" src="data.js"></script> |
| 16 | </head> | |
| 17 | <body> | |
| c7371f01 RK |
18 | <p>Should draw a three-colored background, split horizontally at y:2.25, and |
| 19 | again on the top at x:19Nov:</p> | |
| e7746234 EC |
20 | <div id="div_g" style="width:600px; height:300px;"></div> |
| 21 | ||
| 22 | <div id="status" style="width:100%; height:200px;"></div> | |
| 23 | ||
| 24 | <script type="text/javascript"> | |
| 25 | s = document.getElementById("status"); | |
| 26 | ||
| 27 | g = new Dygraph( | |
| 28 | document.getElementById("div_g"), | |
| 29 | NoisyData, { | |
| 30 | rollPeriod: 7, | |
| 31 | showRoller: true, | |
| 32 | errorBars: true, | |
| 33 | ||
| 04143109 | 34 | underlayCallback: function(canvas, area, g) { |
| fdcf1ce4 RK |
35 | // Selecting a date in the middle of the graph. |
| 36 | var splitDate = new Date("2006-11-19").getTime(); | |
| 5879c20d | 37 | var coords = g.toDomCoords(splitDate, 2.25); |
| 04143109 | 38 | |
| 5879c20d | 39 | // splitX and splitY are the coordinates on the canvas for (2006-11-19, 2.25). |
| fdcf1ce4 RK |
40 | var splitX = coords[0]; |
| 41 | var splitY = coords[1]; | |
| 42 | ||
| 5879c20d RK |
43 | // The drawing area doesn't start at (0, 0), it starts at (area.x, area.y). |
| 44 | // That's why we subtract them from splitX and splitY. This gives us the | |
| 45 | // actual distance from the upper-left hand corder of the graph itself. | |
| 46 | var leftSideWidth = splitX - area.x; | |
| 47 | var rightSideWidth = area.w - leftSideWidth; | |
| 48 | var topHeight = splitY - area.y; | |
| 49 | var bottomHeight = area.h - topHeight; | |
| 2fc82862 | 50 | |
| fdcf1ce4 | 51 | // fillRect(x, y, width, height) |
| 2fc82862 | 52 | // Top section: y = (2.25, +Infinity) |
| 5879c20d | 53 | // left: (x < 2006-11-19) |
| e7746234 | 54 | canvas.fillStyle = 'lightblue'; |
| 5879c20d | 55 | canvas.fillRect(area.x, area.y, leftSideWidth, topHeight); |
| fdcf1ce4 | 56 | |
| 5879c20d | 57 | // right: (x > 2006-11-19) |
| fdcf1ce4 RK |
58 | canvas.fillStyle = 'orange'; |
| 59 | canvas.fillRect(splitX, area.y, rightSideWidth, topHeight); | |
| 60 | ||
| 61 | // Bottom section: y = (-Infinity, 2.25) | |
| 62 | canvas.fillStyle = 'pink'; | |
| 63 | canvas.fillRect(area.x, splitY, area.w, bottomHeight); | |
| e7746234 EC |
64 | } |
| 65 | } | |
| 66 | ); | |
| 67 | </script> | |
| 68 | </body> | |
| 69 | </html> |