| 1 |
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| 2 | // Dropdown menu control
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| 3 |
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| 4 | function Dropdown(activatorId, dropdownId) {
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| 5 |
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| 6 | // store activator and dropdown elements
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| 7 | this.activator = document.getElementById(activatorId);
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| 8 | this.dropdown = document.getElementById(dropdownId);
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| 9 | this.activatorImage = document.getElementById(activatorId + "Image");
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| 10 |
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| 11 | // wire up show/hide events
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| 12 | registerEventHandler(this.activator,'mouseover', getInstanceDelegate(this, "show"));
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| 13 | registerEventHandler(this.activator,'mouseout', getInstanceDelegate(this, "requestHide"));
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| 14 | registerEventHandler(this.dropdown,'mouseover', getInstanceDelegate(this, "show"));
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| 15 | registerEventHandler(this.dropdown,'mouseout', getInstanceDelegate(this, "requestHide"));
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| 16 |
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| 17 | // fix visibility and position
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| 18 | this.dropdown.style.visibility = 'hidden';
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| 19 | this.dropdown.style.position = 'absolute';
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| 20 | this.reposition(null);
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| 21 |
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| 22 | // wire up repositioning event
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| 23 | registerEventHandler(window, 'resize', getInstanceDelegate(this, "reposition"));
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| 24 |
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| 25 |
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| 26 | }
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| 27 |
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| 28 | Dropdown.prototype.show = function(e) {
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| 29 | clearTimeout(this.timer);
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| 30 | this.dropdown.style.visibility = 'visible';
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| 31 | if (this.activatorImage != null)
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| 32 | this.activatorImage.src = dropDownHoverImage.src;
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| 33 | if (this.activator != null)
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| 34 | this.activator.className = "filterOnHover";
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| 35 | }
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| 36 |
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| 37 | Dropdown.prototype.hide = function(e) {
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| 38 | this.dropdown.style.visibility = 'hidden';
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| 39 | if (this.activatorImage != null)
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| 40 | this.activatorImage.src = dropDownImage.src;
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| 41 | if (this.activator != null)
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| 42 | this.activator.className = "filter";
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| 43 | }
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| 44 |
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| 45 | Dropdown.prototype.requestHide = function(e) {
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| 46 | this.timer = setTimeout( getInstanceDelegate(this, "hide"), 250);
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| 47 | }
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| 48 |
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| 49 | Dropdown.prototype.reposition = function(e) {
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| 50 |
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| 51 | // get position of activator
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| 52 | var offsetLeft = 0;
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| 53 | var offsetTop = 0;
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| 54 | var offsetElement = this.activator;
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| 55 |
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| 56 | while (offsetElement) {
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| 57 | offsetLeft += offsetElement.offsetLeft;
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| 58 | offsetTop += offsetElement.offsetTop;
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| 59 | offsetElement = offsetElement.offsetParent;
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| 60 | }
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| 61 |
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| 62 | // set position of dropdown relative to it
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| 63 | this.dropdown.style.left = offsetLeft;
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| 64 | this.dropdown.style.top = offsetTop + this.activator.offsetHeight;
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| 65 | }
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| 66 |
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| 67 | Dropdown.prototype.SetActivatorLabel = function(labelId)
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| 68 | {
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| 69 | // get the children of the activator node, which includes the label nodes
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| 70 | var labelNodes = this.activator.childNodes;
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| 71 |
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| 72 |
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| 73 | for(var labelCount=0; labelCount < labelNodes.length; labelCount++)
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| 74 | {
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| 75 | if(labelNodes[labelCount].tagName == 'LABEL')
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| 76 | {
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| 77 | var labelNodeId = labelNodes[labelCount].getAttribute('id');
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| 78 | if (labelNodeId == labelId)
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| 79 | {
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| 80 | labelNodes[labelCount].style.display = "inline";
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| 81 | }
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| 82 | else
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| 83 | {
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| 84 | labelNodes[labelCount].style.display = "none";
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| 85 | }
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| 86 | }
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| 87 | }
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| 88 | }
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| 89 |
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