| /*! |
| * The MIT License |
| * |
| * Copyright (c) 2008 Jason Frame (jason@onehackoranother.com) |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| pv.Behavior.tipsy = function(opts) { |
| var tip; |
| |
| /** |
| * @private When the mouse leaves the root panel, trigger a mouseleave event |
| * on the tooltip span. This is necessary for dimensionless marks (e.g., |
| * lines) when the mouse isn't actually over the span. |
| */ |
| function trigger() { |
| $(tip).tipsy("hide"); |
| } |
| |
| /** |
| * @private When the mouse leaves the tooltip, remove the tooltip span. This |
| * event handler is declared outside of the event handler such that duplicate |
| * registrations are ignored. |
| */ |
| function cleanup() { |
| if (tip) { |
| tip.parentNode.removeChild(tip); |
| tip = null; |
| } |
| } |
| |
| return function(d) { |
| /* Compute the transform to offset the tooltip position. */ |
| var t = pv.Transform.identity, p = this.parent; |
| do { |
| t = t.translate(p.left(), p.top()).times(p.transform()); |
| } while (p = p.parent); |
| |
| /* Create and cache the tooltip span to be used by tipsy. */ |
| if (!tip) { |
| var c = this.root.canvas(); |
| c.style.position = "relative"; |
| $(c).mouseleave(trigger); |
| |
| tip = c.appendChild(document.createElement("div")); |
| tip.style.position = "absolute"; |
| $(tip).tipsy(opts); |
| } |
| |
| /* Propagate the tooltip text. */ |
| tip.title = this.title() || this.text(); |
| |
| /* |
| * Compute bounding box. TODO support area, lines, wedges, stroke. Also |
| * note that CSS positioning does not support subpixels, and the current |
| * rounding implementation can be off by one pixel. |
| */ |
| if (this.properties.width) { |
| tip.style.width = Math.ceil(this.width() * t.k) + 1 + "px"; |
| tip.style.height = Math.ceil(this.height() * t.k) + 1 + "px"; |
| } else if (this.properties.radius) { |
| var r = this.radius(); |
| t.x -= r; |
| t.y -= r; |
| tip.style.height = tip.style.width = Math.ceil(2 * r * t.k) + "px"; |
| } |
| tip.style.left = Math.floor(this.left() * t.k + t.x) + "px"; |
| tip.style.top = Math.floor(this.top() * t.k + t.y) + "px"; |
| |
| /* |
| * Cleanup the tooltip span on mouseout. Immediately trigger the tooltip; |
| * this is necessary for dimensionless marks. |
| */ |
| $(tip).mouseleave(cleanup).tipsy("show"); |
| }; |
| }; |