# HG changeset patch
# User Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
# Date 1242859497 -7200
# Node ID f36d43f00f32ea118977d13f735515816ad3b5be
# Parent  7e19c94ce0d7122237581b0422663a3d7984683a
[views] plot with flot and get rid of matplotlib

diff -r 7e19c94ce0d7 -r f36d43f00f32 web/data/cubicweb.flot.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/data/cubicweb.flot.js	Thu May 21 00:44:57 2009 +0200
@@ -0,0 +1,34 @@
+function showTooltip(x, y, contents) {
+    $('<div id="tooltip">' + contents + '</div>').css( {
+            position: 'absolute',
+	    display: 'none',
+	    top: y + 5,
+            left: x + 5,
+            border: '1px solid #fdd',
+            padding: '2px',
+            'background-color': '#fee',
+            opacity: 0.80
+		}).appendTo("body").fadeIn(200);
+}
+
+var previousPoint = null;
+function onPlotHover(event, pos, item) {
+    if (item) {
+        if (previousPoint != item.datapoint) {
+    	previousPoint = item.datapoint;
+    	
+    	$("#tooltip").remove();
+    	var x = item.datapoint[0].toFixed(2),
+    	    y = item.datapoint[1].toFixed(2);
+	if (item.datapoint.length == 3) {
+	    var x = new Date(item.datapoint[2]);
+	    x = x.toLocaleDateString() + ' ' + x.toLocaleTimeString();
+	}
+    	showTooltip(item.pageX, item.pageY,
+    		    item.series.label + ': (' + x + ' ; ' + y + ')');
+            }
+    } else {
+        $("#tooltip").remove();
+        previousPoint = null;
+    }
+}
diff -r 7e19c94ce0d7 -r f36d43f00f32 web/data/excanvas.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/data/excanvas.js	Thu May 21 00:44:57 2009 +0200
@@ -0,0 +1,785 @@
+// Copyright 2006 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// Known Issues:
+//
+// * Patterns are not implemented.
+// * Radial gradient are not implemented. The VML version of these look very
+//   different from the canvas one.
+// * Clipping paths are not implemented.
+// * Coordsize. The width and height attribute have higher priority than the
+//   width and height style values which isn't correct.
+// * Painting mode isn't implemented.
+// * Canvas width/height should is using content-box by default. IE in
+//   Quirks mode will draw the canvas using border-box. Either change your
+//   doctype to HTML5
+//   (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
+//   or use Box Sizing Behavior from WebFX
+//   (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
+// * Optimize. There is always room for speed improvements.
+
+// only add this code if we do not already have a canvas implementation
+if (!window.CanvasRenderingContext2D) {
+
+(function () {
+
+  // alias some functions to make (compiled) code shorter
+  var m = Math;
+  var mr = m.round;
+  var ms = m.sin;
+  var mc = m.cos;
+
+  // this is used for sub pixel precision
+  var Z = 10;
+  var Z2 = Z / 2;
+
+  var G_vmlCanvasManager_ = {
+    init: function (opt_doc) {
+      var doc = opt_doc || document;
+      if (/MSIE/.test(navigator.userAgent) && !window.opera) {
+        var self = this;
+        doc.attachEvent("onreadystatechange", function () {
+          self.init_(doc);
+        });
+      }
+    },
+
+    init_: function (doc) {
+      if (doc.readyState == "complete") {
+        // create xmlns
+        if (!doc.namespaces["g_vml_"]) {
+          doc.namespaces.add("g_vml_", "urn:schemas-microsoft-com:vml");
+        }
+
+        // setup default css
+        var ss = doc.createStyleSheet();
+        ss.cssText = "canvas{display:inline-block;overflow:hidden;" +
+            // default size is 300x150 in Gecko and Opera
+            "text-align:left;width:300px;height:150px}" +
+            "g_vml_\\:*{behavior:url(#default#VML)}";
+
+        // find all canvas elements
+        var els = doc.getElementsByTagName("canvas");
+        for (var i = 0; i < els.length; i++) {
+          if (!els[i].getContext) {
+            this.initElement(els[i]);
+          }
+        }
+      }
+    },
+
+    fixElement_: function (el) {
+      // in IE before version 5.5 we would need to add HTML: to the tag name
+      // but we do not care about IE before version 6
+      var outerHTML = el.outerHTML;
+
+      var newEl = el.ownerDocument.createElement(outerHTML);
+      // if the tag is still open IE has created the children as siblings and
+      // it has also created a tag with the name "/FOO"
+      if (outerHTML.slice(-2) != "/>") {
+        var tagName = "/" + el.tagName;
+        var ns;
+        // remove content
+        while ((ns = el.nextSibling) && ns.tagName != tagName) {
+          ns.removeNode();
+        }
+        // remove the incorrect closing tag
+        if (ns) {
+          ns.removeNode();
+        }
+      }
+      el.parentNode.replaceChild(newEl, el);
+      return newEl;
+    },
+
+    /**
+     * Public initializes a canvas element so that it can be used as canvas
+     * element from now on. This is called automatically before the page is
+     * loaded but if you are creating elements using createElement you need to
+     * make sure this is called on the element.
+     * @param {HTMLElement} el The canvas element to initialize.
+     * @return {HTMLElement} the element that was created.
+     */
+    initElement: function (el) {
+      el = this.fixElement_(el);
+      el.getContext = function () {
+        if (this.context_) {
+          return this.context_;
+        }
+        return this.context_ = new CanvasRenderingContext2D_(this);
+      };
+
+      // do not use inline function because that will leak memory
+      el.attachEvent('onpropertychange', onPropertyChange);
+      el.attachEvent('onresize', onResize);
+
+      var attrs = el.attributes;
+      if (attrs.width && attrs.width.specified) {
+        // TODO: use runtimeStyle and coordsize
+        // el.getContext().setWidth_(attrs.width.nodeValue);
+        el.style.width = attrs.width.nodeValue + "px";
+      } else {
+        el.width = el.clientWidth;
+      }
+      if (attrs.height && attrs.height.specified) {
+        // TODO: use runtimeStyle and coordsize
+        // el.getContext().setHeight_(attrs.height.nodeValue);
+        el.style.height = attrs.height.nodeValue + "px";
+      } else {
+        el.height = el.clientHeight;
+      }
+      //el.getContext().setCoordsize_()
+      return el;
+    }
+  };
+
+  function onPropertyChange(e) {
+    var el = e.srcElement;
+
+    switch (e.propertyName) {
+      case 'width':
+        el.style.width = el.attributes.width.nodeValue + "px";
+        el.getContext().clearRect();
+        break;
+      case 'height':
+        el.style.height = el.attributes.height.nodeValue + "px";
+        el.getContext().clearRect();
+        break;
+    }
+  }
+
+  function onResize(e) {
+    var el = e.srcElement;
+    if (el.firstChild) {
+      el.firstChild.style.width =  el.clientWidth + 'px';
+      el.firstChild.style.height = el.clientHeight + 'px';
+    }
+  }
+
+  G_vmlCanvasManager_.init();
+
+  // precompute "00" to "FF"
+  var dec2hex = [];
+  for (var i = 0; i < 16; i++) {
+    for (var j = 0; j < 16; j++) {
+      dec2hex[i * 16 + j] = i.toString(16) + j.toString(16);
+    }
+  }
+
+  function createMatrixIdentity() {
+    return [
+      [1, 0, 0],
+      [0, 1, 0],
+      [0, 0, 1]
+    ];
+  }
+
+  function matrixMultiply(m1, m2) {
+    var result = createMatrixIdentity();
+
+    for (var x = 0; x < 3; x++) {
+      for (var y = 0; y < 3; y++) {
+        var sum = 0;
+
+        for (var z = 0; z < 3; z++) {
+          sum += m1[x][z] * m2[z][y];
+        }
+
+        result[x][y] = sum;
+      }
+    }
+    return result;
+  }
+
+  function copyState(o1, o2) {
+    o2.fillStyle     = o1.fillStyle;
+    o2.lineCap       = o1.lineCap;
+    o2.lineJoin      = o1.lineJoin;
+    o2.lineWidth     = o1.lineWidth;
+    o2.miterLimit    = o1.miterLimit;
+    o2.shadowBlur    = o1.shadowBlur;
+    o2.shadowColor   = o1.shadowColor;
+    o2.shadowOffsetX = o1.shadowOffsetX;
+    o2.shadowOffsetY = o1.shadowOffsetY;
+    o2.strokeStyle   = o1.strokeStyle;
+    o2.arcScaleX_    = o1.arcScaleX_;
+    o2.arcScaleY_    = o1.arcScaleY_;
+  }
+
+  function processStyle(styleString) {
+    var str, alpha = 1;
+
+    styleString = String(styleString);
+    if (styleString.substring(0, 3) == "rgb") {
+      var start = styleString.indexOf("(", 3);
+      var end = styleString.indexOf(")", start + 1);
+      var guts = styleString.substring(start + 1, end).split(",");
+
+      str = "#";
+      for (var i = 0; i < 3; i++) {
+        str += dec2hex[Number(guts[i])];
+      }
+
+      if ((guts.length == 4) && (styleString.substr(3, 1) == "a")) {
+        alpha = guts[3];
+      }
+    } else {
+      str = styleString;
+    }
+
+    return [str, alpha];
+  }
+
+  function processLineCap(lineCap) {
+    switch (lineCap) {
+      case "butt":
+        return "flat";
+      case "round":
+        return "round";
+      case "square":
+      default:
+        return "square";
+    }
+  }
+
+  /**
+   * This class implements CanvasRenderingContext2D interface as described by
+   * the WHATWG.
+   * @param {HTMLElement} surfaceElement The element that the 2D context should
+   * be associated with
+   */
+   function CanvasRenderingContext2D_(surfaceElement) {
+    this.m_ = createMatrixIdentity();
+
+    this.mStack_ = [];
+    this.aStack_ = [];
+    this.currentPath_ = [];
+
+    // Canvas context properties
+    this.strokeStyle = "#000";
+    this.fillStyle = "#000";
+
+    this.lineWidth = 1;
+    this.lineJoin = "miter";
+    this.lineCap = "butt";
+    this.miterLimit = Z * 1;
+    this.globalAlpha = 1;
+    this.canvas = surfaceElement;
+
+    var el = surfaceElement.ownerDocument.createElement('div');
+    el.style.width =  surfaceElement.clientWidth + 'px';
+    el.style.height = surfaceElement.clientHeight + 'px';
+    el.style.overflow = 'hidden';
+    el.style.position = 'absolute';
+    surfaceElement.appendChild(el);
+
+    this.element_ = el;
+    this.arcScaleX_ = 1;
+    this.arcScaleY_ = 1;
+  }
+
+  var contextPrototype = CanvasRenderingContext2D_.prototype;
+  contextPrototype.clearRect = function() {
+    this.element_.innerHTML = "";
+    this.currentPath_ = [];
+  };
+
+  contextPrototype.beginPath = function() {
+    // TODO: Branch current matrix so that save/restore has no effect
+    //       as per safari docs.
+
+    this.currentPath_ = [];
+  };
+
+  contextPrototype.moveTo = function(aX, aY) {
+    this.currentPath_.push({type: "moveTo", x: aX, y: aY});
+    this.currentX_ = aX;
+    this.currentY_ = aY;
+  };
+
+  contextPrototype.lineTo = function(aX, aY) {
+    this.currentPath_.push({type: "lineTo", x: aX, y: aY});
+    this.currentX_ = aX;
+    this.currentY_ = aY;
+  };
+
+  contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
+                                            aCP2x, aCP2y,
+                                            aX, aY) {
+    this.currentPath_.push({type: "bezierCurveTo",
+                           cp1x: aCP1x,
+                           cp1y: aCP1y,
+                           cp2x: aCP2x,
+                           cp2y: aCP2y,
+                           x: aX,
+                           y: aY});
+    this.currentX_ = aX;
+    this.currentY_ = aY;
+  };
+
+  contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) {
+    // the following is lifted almost directly from
+    // http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
+    var cp1x = this.currentX_ + 2.0 / 3.0 * (aCPx - this.currentX_);
+    var cp1y = this.currentY_ + 2.0 / 3.0 * (aCPy - this.currentY_);
+    var cp2x = cp1x + (aX - this.currentX_) / 3.0;
+    var cp2y = cp1y + (aY - this.currentY_) / 3.0;
+    this.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, aX, aY);
+  };
+
+  contextPrototype.arc = function(aX, aY, aRadius,
+                                  aStartAngle, aEndAngle, aClockwise) {
+    aRadius *= Z;
+    var arcType = aClockwise ? "at" : "wa";
+
+    var xStart = aX + (mc(aStartAngle) * aRadius) - Z2;
+    var yStart = aY + (ms(aStartAngle) * aRadius) - Z2;
+
+    var xEnd = aX + (mc(aEndAngle) * aRadius) - Z2;
+    var yEnd = aY + (ms(aEndAngle) * aRadius) - Z2;
+
+    // IE won't render arches drawn counter clockwise if xStart == xEnd.
+    if (xStart == xEnd && !aClockwise) {
+      xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
+                       // that can be represented in binary
+    }
+
+    this.currentPath_.push({type: arcType,
+                           x: aX,
+                           y: aY,
+                           radius: aRadius,
+                           xStart: xStart,
+                           yStart: yStart,
+                           xEnd: xEnd,
+                           yEnd: yEnd});
+
+  };
+
+  contextPrototype.rect = function(aX, aY, aWidth, aHeight) {
+    this.moveTo(aX, aY);
+    this.lineTo(aX + aWidth, aY);
+    this.lineTo(aX + aWidth, aY + aHeight);
+    this.lineTo(aX, aY + aHeight);
+    this.closePath();
+  };
+
+  contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) {
+    // Will destroy any existing path (same as FF behaviour)
+    this.beginPath();
+    this.moveTo(aX, aY);
+    this.lineTo(aX + aWidth, aY);
+    this.lineTo(aX + aWidth, aY + aHeight);
+    this.lineTo(aX, aY + aHeight);
+    this.closePath();
+    this.stroke();
+  };
+
+  contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
+    // Will destroy any existing path (same as FF behaviour)
+    this.beginPath();
+    this.moveTo(aX, aY);
+    this.lineTo(aX + aWidth, aY);
+    this.lineTo(aX + aWidth, aY + aHeight);
+    this.lineTo(aX, aY + aHeight);
+    this.closePath();
+    this.fill();
+  };
+
+  contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) {
+    var gradient = new CanvasGradient_("gradient");
+    return gradient;
+  };
+
+  contextPrototype.createRadialGradient = function(aX0, aY0,
+                                                   aR0, aX1,
+                                                   aY1, aR1) {
+    var gradient = new CanvasGradient_("gradientradial");
+    gradient.radius1_ = aR0;
+    gradient.radius2_ = aR1;
+    gradient.focus_.x = aX0;
+    gradient.focus_.y = aY0;
+    return gradient;
+  };
+
+  contextPrototype.drawImage = function (image, var_args) {
+    var dx, dy, dw, dh, sx, sy, sw, sh;
+
+    // to find the original width we overide the width and height
+    var oldRuntimeWidth = image.runtimeStyle.width;
+    var oldRuntimeHeight = image.runtimeStyle.height;
+    image.runtimeStyle.width = 'auto';
+    image.runtimeStyle.height = 'auto';
+
+    // get the original size
+    var w = image.width;
+    var h = image.height;
+
+    // and remove overides
+    image.runtimeStyle.width = oldRuntimeWidth;
+    image.runtimeStyle.height = oldRuntimeHeight;
+
+    if (arguments.length == 3) {
+      dx = arguments[1];
+      dy = arguments[2];
+      sx = sy = 0;
+      sw = dw = w;
+      sh = dh = h;
+    } else if (arguments.length == 5) {
+      dx = arguments[1];
+      dy = arguments[2];
+      dw = arguments[3];
+      dh = arguments[4];
+      sx = sy = 0;
+      sw = w;
+      sh = h;
+    } else if (arguments.length == 9) {
+      sx = arguments[1];
+      sy = arguments[2];
+      sw = arguments[3];
+      sh = arguments[4];
+      dx = arguments[5];
+      dy = arguments[6];
+      dw = arguments[7];
+      dh = arguments[8];
+    } else {
+      throw "Invalid number of arguments";
+    }
+
+    var d = this.getCoords_(dx, dy);
+
+    var w2 = sw / 2;
+    var h2 = sh / 2;
+
+    var vmlStr = [];
+
+    var W = 10;
+    var H = 10;
+
+    // For some reason that I've now forgotten, using divs didn't work
+    vmlStr.push(' <g_vml_:group',
+                ' coordsize="', Z * W, ',', Z * H, '"',
+                ' coordorigin="0,0"' ,
+                ' style="width:', W, ';height:', H, ';position:absolute;');
+
+    // If filters are necessary (rotation exists), create them
+    // filters are bog-slow, so only create them if abbsolutely necessary
+    // The following check doesn't account for skews (which don't exist
+    // in the canvas spec (yet) anyway.
+
+    if (this.m_[0][0] != 1 || this.m_[0][1]) {
+      var filter = [];
+
+      // Note the 12/21 reversal
+      filter.push("M11='", this.m_[0][0], "',",
+                  "M12='", this.m_[1][0], "',",
+                  "M21='", this.m_[0][1], "',",
+                  "M22='", this.m_[1][1], "',",
+                  "Dx='", mr(d.x / Z), "',",
+                  "Dy='", mr(d.y / Z), "'");
+
+      // Bounding box calculation (need to minimize displayed area so that
+      // filters don't waste time on unused pixels.
+      var max = d;
+      var c2 = this.getCoords_(dx + dw, dy);
+      var c3 = this.getCoords_(dx, dy + dh);
+      var c4 = this.getCoords_(dx + dw, dy + dh);
+
+      max.x = Math.max(max.x, c2.x, c3.x, c4.x);
+      max.y = Math.max(max.y, c2.y, c3.y, c4.y);
+
+      vmlStr.push("padding:0 ", mr(max.x / Z), "px ", mr(max.y / Z),
+                  "px 0;filter:progid:DXImageTransform.Microsoft.Matrix(",
+                  filter.join(""), ", sizingmethod='clip');");
+    } else {
+      vmlStr.push("top:", mr(d.y / Z), "px;left:", mr(d.x / Z), "px;");
+    }
+
+    vmlStr.push(' ">' ,
+                '<g_vml_:image src="', image.src, '"',
+                ' style="width:', Z * dw, ';',
+                ' height:', Z * dh, ';"',
+                ' cropleft="', sx / w, '"',
+                ' croptop="', sy / h, '"',
+                ' cropright="', (w - sx - sw) / w, '"',
+                ' cropbottom="', (h - sy - sh) / h, '"',
+                ' />',
+                '</g_vml_:group>');
+
+    this.element_.insertAdjacentHTML("BeforeEnd",
+                                    vmlStr.join(""));
+  };
+
+  contextPrototype.stroke = function(aFill) {
+    var lineStr = [];
+    var lineOpen = false;
+    var a = processStyle(aFill ? this.fillStyle : this.strokeStyle);
+    var color = a[0];
+    var opacity = a[1] * this.globalAlpha;
+
+    var W = 10;
+    var H = 10;
+
+    lineStr.push('<g_vml_:shape',
+                 ' fillcolor="', color, '"',
+                 ' filled="', Boolean(aFill), '"',
+                 ' style="position:absolute;width:', W, ';height:', H, ';"',
+                 ' coordorigin="0 0" coordsize="', Z * W, ' ', Z * H, '"',
+                 ' stroked="', !aFill, '"',
+                 ' strokeweight="', this.lineWidth, '"',
+                 ' strokecolor="', color, '"',
+                 ' path="');
+
+    var newSeq = false;
+    var min = {x: null, y: null};
+    var max = {x: null, y: null};
+
+    for (var i = 0; i < this.currentPath_.length; i++) {
+      var p = this.currentPath_[i];
+
+      if (p.type == "moveTo") {
+        lineStr.push(" m ");
+        var c = this.getCoords_(p.x, p.y);
+        lineStr.push(mr(c.x), ",", mr(c.y));
+      } else if (p.type == "lineTo") {
+        lineStr.push(" l ");
+        var c = this.getCoords_(p.x, p.y);
+        lineStr.push(mr(c.x), ",", mr(c.y));
+      } else if (p.type == "close") {
+        lineStr.push(" x ");
+      } else if (p.type == "bezierCurveTo") {
+        lineStr.push(" c ");
+        var c = this.getCoords_(p.x, p.y);
+        var c1 = this.getCoords_(p.cp1x, p.cp1y);
+        var c2 = this.getCoords_(p.cp2x, p.cp2y);
+        lineStr.push(mr(c1.x), ",", mr(c1.y), ",",
+                     mr(c2.x), ",", mr(c2.y), ",",
+                     mr(c.x), ",", mr(c.y));
+      } else if (p.type == "at" || p.type == "wa") {
+        lineStr.push(" ", p.type, " ");
+        var c  = this.getCoords_(p.x, p.y);
+        var cStart = this.getCoords_(p.xStart, p.yStart);
+        var cEnd = this.getCoords_(p.xEnd, p.yEnd);
+
+        lineStr.push(mr(c.x - this.arcScaleX_ * p.radius), ",",
+                     mr(c.y - this.arcScaleY_ * p.radius), " ",
+                     mr(c.x + this.arcScaleX_ * p.radius), ",",
+                     mr(c.y + this.arcScaleY_ * p.radius), " ",
+                     mr(cStart.x), ",", mr(cStart.y), " ",
+                     mr(cEnd.x), ",", mr(cEnd.y));
+      }
+
+
+      // TODO: Following is broken for curves due to
+      //       move to proper paths.
+
+      // Figure out dimensions so we can do gradient fills
+      // properly
+      if(c) {
+        if (min.x == null || c.x < min.x) {
+          min.x = c.x;
+        }
+        if (max.x == null || c.x > max.x) {
+          max.x = c.x;
+        }
+        if (min.y == null || c.y < min.y) {
+          min.y = c.y;
+        }
+        if (max.y == null || c.y > max.y) {
+          max.y = c.y;
+        }
+      }
+    }
+    lineStr.push(' ">');
+
+    if (typeof this.fillStyle == "object") {
+      var focus = {x: "50%", y: "50%"};
+      var width = (max.x - min.x);
+      var height = (max.y - min.y);
+      var dimension = (width > height) ? width : height;
+
+      focus.x = mr((this.fillStyle.focus_.x / width) * 100 + 50) + "%";
+      focus.y = mr((this.fillStyle.focus_.y / height) * 100 + 50) + "%";
+
+      var colors = [];
+
+      // inside radius (%)
+      if (this.fillStyle.type_ == "gradientradial") {
+        var inside = (this.fillStyle.radius1_ / dimension * 100);
+
+        // percentage that outside radius exceeds inside radius
+        var expansion = (this.fillStyle.radius2_ / dimension * 100) - inside;
+      } else {
+        var inside = 0;
+        var expansion = 100;
+      }
+
+      var insidecolor = {offset: null, color: null};
+      var outsidecolor = {offset: null, color: null};
+
+      // We need to sort 'colors' by percentage, from 0 > 100 otherwise ie
+      // won't interpret it correctly
+      this.fillStyle.colors_.sort(function (cs1, cs2) {
+        return cs1.offset - cs2.offset;
+      });
+
+      for (var i = 0; i < this.fillStyle.colors_.length; i++) {
+        var fs = this.fillStyle.colors_[i];
+
+        colors.push( (fs.offset * expansion) + inside, "% ", fs.color, ",");
+
+        if (fs.offset > insidecolor.offset || insidecolor.offset == null) {
+          insidecolor.offset = fs.offset;
+          insidecolor.color = fs.color;
+        }
+
+        if (fs.offset < outsidecolor.offset || outsidecolor.offset == null) {
+          outsidecolor.offset = fs.offset;
+          outsidecolor.color = fs.color;
+        }
+      }
+      colors.pop();
+
+      lineStr.push('<g_vml_:fill',
+                   ' color="', outsidecolor.color, '"',
+                   ' color2="', insidecolor.color, '"',
+                   ' type="', this.fillStyle.type_, '"',
+                   ' focusposition="', focus.x, ', ', focus.y, '"',
+                   ' colors="', colors.join(""), '"',
+                   ' opacity="', opacity, '" />');
+    } else if (aFill) {
+      lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity, '" />');
+    } else {
+      lineStr.push(
+        '<g_vml_:stroke',
+        ' opacity="', opacity,'"',
+        ' joinstyle="', this.lineJoin, '"',
+        ' miterlimit="', this.miterLimit, '"',
+        ' endcap="', processLineCap(this.lineCap) ,'"',
+        ' weight="', this.lineWidth, 'px"',
+        ' color="', color,'" />'
+      );
+    }
+
+    lineStr.push("</g_vml_:shape>");
+
+    this.element_.insertAdjacentHTML("beforeEnd", lineStr.join(""));
+
+    //this.currentPath_ = [];
+  };
+
+  contextPrototype.fill = function() {
+    this.stroke(true);
+  };
+
+  contextPrototype.closePath = function() {
+    this.currentPath_.push({type: "close"});
+  };
+
+  /**
+   * @private
+   */
+  contextPrototype.getCoords_ = function(aX, aY) {
+    return {
+      x: Z * (aX * this.m_[0][0] + aY * this.m_[1][0] + this.m_[2][0]) - Z2,
+      y: Z * (aX * this.m_[0][1] + aY * this.m_[1][1] + this.m_[2][1]) - Z2
+    }
+  };
+
+  contextPrototype.save = function() {
+    var o = {};
+    copyState(this, o);
+    this.aStack_.push(o);
+    this.mStack_.push(this.m_);
+    this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
+  };
+
+  contextPrototype.restore = function() {
+    copyState(this.aStack_.pop(), this);
+    this.m_ = this.mStack_.pop();
+  };
+
+  contextPrototype.translate = function(aX, aY) {
+    var m1 = [
+      [1,  0,  0],
+      [0,  1,  0],
+      [aX, aY, 1]
+    ];
+
+    this.m_ = matrixMultiply(m1, this.m_);
+  };
+
+  contextPrototype.rotate = function(aRot) {
+    var c = mc(aRot);
+    var s = ms(aRot);
+
+    var m1 = [
+      [c,  s, 0],
+      [-s, c, 0],
+      [0,  0, 1]
+    ];
+
+    this.m_ = matrixMultiply(m1, this.m_);
+  };
+
+  contextPrototype.scale = function(aX, aY) {
+    this.arcScaleX_ *= aX;
+    this.arcScaleY_ *= aY;
+    var m1 = [
+      [aX, 0,  0],
+      [0,  aY, 0],
+      [0,  0,  1]
+    ];
+
+    this.m_ = matrixMultiply(m1, this.m_);
+  };
+
+  /******** STUBS ********/
+  contextPrototype.clip = function() {
+    // TODO: Implement
+  };
+
+  contextPrototype.arcTo = function() {
+    // TODO: Implement
+  };
+
+  contextPrototype.createPattern = function() {
+    return new CanvasPattern_;
+  };
+
+  // Gradient / Pattern Stubs
+  function CanvasGradient_(aType) {
+    this.type_ = aType;
+    this.radius1_ = 0;
+    this.radius2_ = 0;
+    this.colors_ = [];
+    this.focus_ = {x: 0, y: 0};
+  }
+
+  CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) {
+    aColor = processStyle(aColor);
+    this.colors_.push({offset: 1-aOffset, color: aColor});
+  };
+
+  function CanvasPattern_() {}
+
+  // set up externs
+  G_vmlCanvasManager = G_vmlCanvasManager_;
+  CanvasRenderingContext2D = CanvasRenderingContext2D_;
+  CanvasGradient = CanvasGradient_;
+  CanvasPattern = CanvasPattern_;
+
+})();
+
+} // if
diff -r 7e19c94ce0d7 -r f36d43f00f32 web/data/jquery.flot.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/data/jquery.flot.js	Thu May 21 00:44:57 2009 +0200
@@ -0,0 +1,1 @@
+(function(F){function D(AO,e,f){var W=[],o={colors:["#edc240","#afd8f8","#cb4b4b","#4da74d","#9440ed"],legend:{show:true,noColumns:1,labelFormatter:null,labelBoxBorderColor:"#ccc",container:null,position:"ne",margin:5,backgroundColor:null,backgroundOpacity:0.85},xaxis:{mode:null,min:null,max:null,autoscaleMargin:null,ticks:null,tickFormatter:null,labelWidth:null,labelHeight:null,tickDecimals:null,tickSize:null,minTickSize:null,monthNames:null,timeformat:null},yaxis:{autoscaleMargin:0.02},x2axis:{autoscaleMargin:null},y2axis:{autoscaleMargin:0.02},points:{show:false,radius:3,lineWidth:2,fill:true,fillColor:"#ffffff"},lines:{show:false,lineWidth:2,fill:false,fillColor:null},bars:{show:false,lineWidth:2,barWidth:1,fill:true,fillColor:null,align:"left"},grid:{color:"#545454",backgroundColor:null,tickColor:"#dddddd",labelMargin:5,borderWidth:2,markings:null,markingsColor:"#f4f4f4",markingsLineWidth:2,clickable:false,hoverable:false,autoHighlight:true,mouseActiveRadius:10},selection:{mode:null,color:"#e8cfac"},shadowSize:4},X=null,AP=null,AQ=null,g=null,AX=null,K=AO,AA={xaxis:{},yaxis:{},x2axis:{},y2axis:{}},m={left:0,right:0,top:0,bottom:0},AI=0,Z=0,N=0,AB=0,S={};this.setData=n;this.setupGrid=s;this.draw=AU;this.clearSelection=I;this.setSelection=AC;this.getCanvas=function(){return X};this.getPlotOffset=function(){return m};this.getData=function(){return W};this.getAxes=function(){return AA};this.highlight=AS;this.unhighlight=AH;y(f);n(e);j();s();AU();function n(AY){W=U(AY);c();t()}function U(Ac){var Aa=[];for(var AZ=0;AZ<Ac.length;++AZ){var Ab;if(Ac[AZ].data){Ab={};for(var AY in Ac[AZ]){Ab[AY]=Ac[AZ][AY]}}else{Ab={data:Ac[AZ]}}Aa.push(Ab)}return Aa}function y(AY){F.extend(true,o,AY);if(o.xaxis.noTicks&&o.xaxis.ticks==null){o.xaxis.ticks=o.xaxis.noTicks}if(o.yaxis.noTicks&&o.yaxis.ticks==null){o.yaxis.ticks=o.yaxis.noTicks}if(o.grid.coloredAreas){o.grid.markings=o.grid.coloredAreas}if(o.grid.coloredAreasColor){o.grid.markingsColor=o.grid.coloredAreasColor}}function c(){var Ad;var Ai=W.length,AY=[],Ab=[];for(Ad=0;Ad<W.length;++Ad){var Ah=W[Ad].color;if(Ah!=null){--Ai;if(typeof Ah=="number"){Ab.push(Ah)}else{AY.push(E(W[Ad].color))}}}for(Ad=0;Ad<Ab.length;++Ad){Ai=Math.max(Ai,Ab[Ad]+1)}var AZ=[],Ac=0;Ad=0;while(AZ.length<Ai){var Ag;if(o.colors.length==Ad){Ag=new 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Aw=Ap.charAt(As);if(At){switch(Aw){case"h":Aw=""+Av.getUTCHours();break;case"H":Aw=Aq(Av.getUTCHours());break;case"M":Aw=Aq(Av.getUTCMinutes());break;case"S":Aw=Aq(Av.getUTCSeconds());break;case"d":Aw=""+Av.getUTCDate();break;case"m":Aw=""+(Av.getUTCMonth()+1);break;case"y":Aw=""+Av.getUTCFullYear();break;case"b":Aw=""+Ar[Av.getUTCMonth()];break}Au.push(Aw);At=false}else{if(Aw=="%"){At=true}else{Au.push(Aw)}}}return Au.join("")}var Ai={second:1000,minute:60*1000,hour:60*60*1000,day:24*60*60*1000,month:30*24*60*60*1000,year:365.2425*24*60*60*1000};var Am=[[1,"second"],[2,"second"],[5,"second"],[10,"second"],[30,"second"],[1,"minute"],[2,"minute"],[5,"minute"],[10,"minute"],[30,"minute"],[1,"hour"],[2,"hour"],[4,"hour"],[8,"hour"],[12,"hour"],[1,"day"],[2,"day"],[3,"day"],[0.25,"month"],[0.5,"month"],[1,"month"],[2,"month"],[3,"month"],[6,"month"],[1,"year"]];var Ab=0;if(Ag.minTickSize!=null){if(typeof 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Ap.toFixed(Aq.tickDecimals)}}Ad.tickSize=Aj?[Ao,Aj]:Ao;Ad.tickGenerator=Ah;if(F.isFunction(Ag.tickFormatter)){Ad.tickFormatter=function(Ap,Aq){return""+Ag.tickFormatter(Ap,Aq)}}else{Ad.tickFormatter=Ak}if(Ag.labelWidth!=null){Ad.labelWidth=Ag.labelWidth}if(Ag.labelHeight!=null){Ad.labelHeight=Ag.labelHeight}}function w(Ac,Ae){Ac.ticks=[];if(!Ac.used){return }if(Ae.ticks==null){Ac.ticks=Ac.tickGenerator(Ac)}else{if(typeof Ae.ticks=="number"){if(Ae.ticks>0){Ac.ticks=Ac.tickGenerator(Ac)}}else{if(Ae.ticks){var Ad=Ae.ticks;if(F.isFunction(Ad)){Ad=Ad({min:Ac.min,max:Ac.max})}var Ab,AY;for(Ab=0;Ab<Ad.length;++Ab){var AZ=null;var Aa=Ad[Ab];if(typeof Aa=="object"){AY=Aa[0];if(Aa.length>1){AZ=Aa[1]}}else{AY=Aa}if(AZ==null){AZ=Ac.tickFormatter(AY,Ac)}Ac.ticks[Ab]={v:AY,label:AZ}}}}}if(Ae.autoscaleMargin!=null&&Ac.ticks.length>0){if(Ae.min==null){Ac.min=Math.min(Ac.min,Ac.ticks[0].v)}if(Ae.max==null&&Ac.ticks.length>1){Ac.max=Math.min(Ac.max,Ac.ticks[Ac.ticks.length-1].v)}}}function AW(){function 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diff -r 7e19c94ce0d7 -r f36d43f00f32 web/views/plots.py
--- a/web/views/plots.py	Thu May 21 00:42:05 2009 +0200
+++ b/web/views/plots.py	Thu May 21 00:44:57 2009 +0200
@@ -7,120 +7,124 @@
 __docformat__ = "restructuredtext en"
 
 import os
+import time
+
+from simplejson import dumps
 
 from logilab.common import flatten
 from logilab.mtconverter import html_escape
 
+from cubicweb.utils import make_uid
 from cubicweb.vregistry import objectify_selector
 from cubicweb.web.views import baseviews
 
 @objectify_selector
-def plot_selector(cls, req, rset, *args, **kwargs):
+def at_least_two_columns(cls, req, rset, *args, **kwargs):
+    if not rset:
+        return 0
+    return len(rset.rows[0]) >= 2
+
+@objectify_selector
+def all_columns_are_numbers(cls, req, rset, *args, **kwargs):
     """accept result set with at least one line and two columns of result
     all columns after second must be of numerical types"""
-    if not rset:
-        return 0
-    if len(rset.rows[0]) < 2:
-        return 0
     for etype in rset.description[0]:
         if etype not in ('Int', 'Float'):
             return 0
     return 1
 
 @objectify_selector
-def piechart_selector(cls, req, rset, *args, **kwargs):
-    if not rset:
-        return 0
-    if len(rset.rows[0]) < 2:
-        return 0
+def second_column_is_number(cls, req, rset, *args, **kwargs):
     etype = rset.description[0][1]
     if etype not  in ('Int', 'Float'):
         return 0
     return 1
 
-try:
-    import matplotlib
-    import sys
-    if 'matplotlib.backends' not in sys.modules:
-        matplotlib.use('Agg')
-    from pylab import figure
-except ImportError:
-    pass
-else:
-    class PlotView(baseviews.AnyRsetView):
-        id = 'plot'
-        title = _('generic plot')
-        binary = True
-        content_type = 'image/png'
-        _plot_count = 0
-        __select__ = plot_selector()
+@objectify_selector
+def columns_are_date_then_numbers(cls, req, rset, *args, **kwargs):
+    etypes = rset.description[0]
+    if etypes[0] not in ('Date', 'Datetime'):
+        return 0
+    for etype in etypes[1:]:
+        if etype not in ('Int', 'Float'):
+            return 0
+    return 1
+
 
-        def call(self, width=None, height=None):
-            # compute dimensions
-            if width is None:
-                if 'width' in self.req.form:
-                    width = int(self.req.form['width'])
-                else:
-                    width = 500
+def filterout_nulls(abscissa, plot):
+    filtered = []
+    for x, y in zip(abscissa, plot):
+        if x is None or y is None:
+            continue
+        filtered.append( (x, y) )
+    return sorted(filtered)
 
-            if height is None:
-                if 'height' in self.req.form:
-                    height = int(self.req.form['height'])
-                else:
-                    height = 400
-            dpi = 100.
+class PlotView(baseviews.AnyRsetView):
+    id = 'plot'
+    title = _('generic plot')
+    __select__ = at_least_two_columns() & all_columns_are_numbers()
+    mode = 'null' # null or time, meant for jquery.flot.js
+
+    def _build_abscissa(self):
+        return [row[0] for row in self.rset]
+
+    def _build_data(self, abscissa, plot):
+        return filterout_nulls(abscissa, plot)
 
-            # compute data
-            abscisses = [row[0] for row in self.rset]
-            courbes = []
-            nbcols = len(self.rset.rows[0])
-            for col in xrange(1, nbcols):
-                courbe = [row[col] for row in self.rset]
-                courbes.append(courbe)
-            if not courbes:
-                raise Exception('no data')
-            # plot data
-            fig = figure(figsize=(width/dpi, height/dpi), dpi=dpi)
-            ax = fig.add_subplot(111)
-            colors = 'brgybrgy'
-            try:
-                float(abscisses[0])
-                xlabels = None
-            except ValueError:
-                xlabels = abscisses
-                abscisses = range(len(xlabels))
-            for idx, courbe in enumerate(courbes):
-                ax.plot(abscisses, courbe, '%sv-' % colors[idx], label=self.rset.description[0][idx+1])
-            ax.autoscale_view()
-            alldata = flatten(courbes)
-            m, M = min(alldata or [0]), max(alldata or [1])
-            if m is None: m = 0
-            if M is None: M = 0
-            margin = float(M-m)/10
-            ax.set_ylim(m-margin, M+margin)
-            ax.grid(True)
-            ax.legend(loc='best')
-            if xlabels is not None:
-                ax.set_xticks(abscisses)
-                ax.set_xticklabels(xlabels)
-            try:
-                fig.autofmt_xdate()
-            except AttributeError:
-                # XXX too old version of matplotlib. Ignore safely.
-                pass
+    def call(self, width=500, height=400):
+        # XXX add excanvas.js if IE
+        self.req.add_js( ('jquery.flot.js', 'cubicweb.flot.js') )
+        # prepare data
+        abscissa = self._build_abscissa()
+        plots = []
+        nbcols = len(self.rset.rows[0])
+        for col in xrange(1, nbcols):
+            plots.append([row[col] for row in self.rset])
+        # plot data
+        plotuid = 'plot%s' % make_uid('foo')
+        self.w(u'<div id="%s" style="width: %spx; height: %spx;"></div>' %
+               (plotuid, width, height))
+        rqlst = self.rset.syntax_tree()
+        # XXX try to make it work with unions
+        varnames = [var.name for var in rqlst.children[0].get_selected_variables()][1:]
+        plotdefs = []
+        plotdata = []
+        for idx, (varname, plot) in enumerate(zip(varnames, plots)):
+            plotid = '%s_%s' % (plotuid, idx)
+            data = self._build_data(abscissa, plot)
+            plotdefs.append('var %s = %s;' % (plotid, dumps(data)))
+            plotdata.append("{label: '%s', data: %s}" % (varname, plotid))
+        self.req.html_headers.add_onload('''
+%(plotdefs)s
+jQuery.plot(jQuery("#%(plotuid)s"), [%(plotdata)s],
+    {points: {show: true},
+     lines: {show: true},
+     grid: {hoverable: true},
+     xaxis: {mode: %(mode)s}});
+jQuery('#%(plotuid)s').bind('plothover', onPlotHover);
+''' % {'plotdefs': '\n'.join(plotdefs),
+       'plotuid': plotuid,
+       'plotdata': ','.join(plotdata),
+       'mode': self.mode})
 
-            # save plot
-            filename = self.build_figname()
-            fig.savefig(filename, dpi=100)
-            img = open(filename, 'rb')
-            self.w(img.read())
-            img.close()
-            os.remove(filename)
+
+class TimeSeriePlotView(PlotView):
+    id = 'plot'
+    title = _('generic plot')
+    __select__ = at_least_two_columns() & columns_are_date_then_numbers()
+    mode = '"time"'
 
-        def build_figname(self):
-            self.__class__._plot_count += 1
-            return '/tmp/burndown_chart_%s_%d.png' % (self.config.appid,
-                                                      self.__class__._plot_count)
+    def _build_abscissa(self):
+        abscissa = [time.mktime(row[0].timetuple()) * 1000
+                    for row in self.rset]
+        return abscissa
+
+    def _build_data(self, abscissa, plot):
+        data = []
+        # XXX find a way to get rid of the 3rd column and find 'mode' in JS
+        for x, y in filterout_nulls(abscissa, plot):
+            data.append( (x, y, x) )
+        return data
 
 try:
     from GChartWrapper import Pie, Pie3D
@@ -130,7 +134,7 @@
     class PieChartView(baseviews.AnyRsetView):
         id = 'piechart'
         pieclass = Pie
-        __select__ = piechart_selector()
+        __select__ = at_least_two_columns() & second_column_is_number()
 
         def call(self, title=None, width=None, height=None):
             piechart = self.pieclass([(row[1] or 0) for row in self.rset])