- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/widget/FisheyeList.js
dojo.provide("dojox.widget.FisheyeList");
dojo.require("dijit._Widget");
dojo.require("dijit._Templated");
dojo.require("dijit._Container");
dojo.declare("dojox.widget.FisheyeList", [dijit._Widget, dijit._Templated, dijit._Container], {
// summary:
// Menu similar to the fish eye menu on the Mac OS
// example:
// | <div dojoType="FisheyeList"
// | itemWidth="40" itemHeight="40"
// | itemMaxWidth="150" itemMaxHeight="150"
// | orientation="horizontal"
// | effectUnits="2"
// | itemPadding="10"
// | attachEdge="center"
// | labelEdge="bottom">
// |
// | <div dojoType="FisheyeListItem"
// | id="item1"
// | onclick="alert('click on' + this.label + '(from widget id ' + this.widgetId + ')!');"
// | label="Item 1"
// | iconSrc="images/fisheye_1.png">
// | </div>
// | ...
// | </div>
//
constructor: function(){
//
// TODO
// fix really long labels in vertical mode
//
this.pos = {'x': -1, 'y': -1}; // current cursor position, relative to the grid
// for conservative trigger mode, when triggered, timerScale is gradually increased from 0 to 1
this.timerScale = 1.0;
},
EDGE: {
CENTER: 0,
LEFT: 1,
RIGHT: 2,
TOP: 3,
BOTTOM: 4
},
templateString: '<div class="dojoxFisheyeListBar" dojoAttachPoint="containerNode"></div>',
snarfChildDomOutput: true,
// itemWidth: Integer
// width of menu item (in pixels) in it's dormant state (when the mouse is far away)
itemWidth: 40,
// itemHeight: Integer
// height of menu item (in pixels) in it's dormant state (when the mouse is far away)
itemHeight: 40,
// itemMaxWidth: Integer
// width of menu item (in pixels) in it's fully enlarged state (when the mouse is directly over it)
itemMaxWidth: 150,
// itemMaxHeight: Integer
// height of menu item (in pixels) in it's fully enlarged state (when the mouse is directly over it)
itemMaxHeight: 150,
imgNode: null,
// orientation: String
// orientation of the menu, either "horizontal" or "vertical"
orientation: 'horizontal',
// isFixed: Boolean
// toggle to enable additional listener (window scroll) if FisheyeList is in a fixed postion
isFixed: false,
// conservativeTrigger: Boolean
// if true, don't start enlarging menu items until mouse is over an image;
// if false, start enlarging menu items as the mouse moves near them.
conservativeTrigger: false,
// effectUnits: Number
// controls how much reaction the menu makes, relative to the distance of the mouse from the menu
effectUnits: 2,
// itemPadding: Integer
// padding (in pixels) betweeen each menu item
itemPadding: 10,
// attachEdge: String
// controls the border that the menu items don't expand past;
// for example, if set to "top", then the menu items will drop downwards as they expand.
// values
// "center", "left", "right", "top", "bottom".
attachEdge: 'center',
// labelEdge: String
// controls were the labels show up in relation to the menu item icons
// values
// "center", "left", "right", "top", "bottom".
labelEdge: 'bottom',
postCreate: function(){
var e = this.EDGE;
dojo.setSelectable(this.domNode, false);
var isHorizontal = this.isHorizontal = (this.orientation == 'horizontal');
this.selectedNode = -1;
this.isOver = false;
this.hitX1 = -1;
this.hitY1 = -1;
this.hitX2 = -1;
this.hitY2 = -1;
//
// only some edges make sense...
//
this.anchorEdge = this._toEdge(this.attachEdge, e.CENTER);
this.labelEdge = this._toEdge(this.labelEdge, e.TOP);
if(this.labelEdge == e.CENTER){ this.labelEdge = e.TOP; }
if(isHorizontal){
if(this.anchorEdge == e.LEFT){ this.anchorEdge = e.CENTER; }
if(this.anchorEdge == e.RIGHT){ this.anchorEdge = e.CENTER; }
if(this.labelEdge == e.LEFT){ this.labelEdge = e.TOP; }
if(this.labelEdge == e.RIGHT){ this.labelEdge = e.TOP; }
}else{
if(this.anchorEdge == e.TOP){ this.anchorEdge = e.CENTER; }
if(this.anchorEdge == e.BOTTOM){ this.anchorEdge = e.CENTER; }
if(this.labelEdge == e.TOP){ this.labelEdge = e.LEFT; }
if(this.labelEdge == e.BOTTOM){ this.labelEdge = e.LEFT; }
}
//
// figure out the proximity size
//
var effectUnits = this.effectUnits;
this.proximityLeft = this.itemWidth * (effectUnits - 0.5);
this.proximityRight = this.itemWidth * (effectUnits - 0.5);
this.proximityTop = this.itemHeight * (effectUnits - 0.5);
this.proximityBottom = this.itemHeight * (effectUnits - 0.5);
if(this.anchorEdge == e.LEFT){
this.proximityLeft = 0;
}
if(this.anchorEdge == e.RIGHT){
this.proximityRight = 0;
}
if(this.anchorEdge == e.TOP){
this.proximityTop = 0;
}
if(this.anchorEdge == e.BOTTOM){
this.proximityBottom = 0;
}
if(this.anchorEdge == e.CENTER){
this.proximityLeft /= 2;
this.proximityRight /= 2;
this.proximityTop /= 2;
this.proximityBottom /= 2;
}
},
startup: function(){
// summary: create our connections and setup our FisheyeList
this.children = this.getChildren();
//original postCreate() --tk
this._initializePositioning();
//
// in liberal trigger mode, activate menu whenever mouse is close
//
if(!this.conservativeTrigger){
this._onMouseMoveHandle = dojo.connect(document.documentElement, "onmousemove", this, "_onMouseMove");
}
if (this.isFixed){
this._onScrollHandle = dojo.connect(document,"onscroll",this,"_onScroll");
}
// Deactivate the menu if mouse is moved off screen (doesn't work for FF?)
this._onMouseOutHandle = dojo.connect(document.documentElement, "onmouseout", this, "_onBodyOut");
this._addChildHandle = dojo.connect(this, "addChild", this, "_initializePositioning");
this._onResizeHandle = dojo.connect(window,"onresize", this, "_initializePositioning");
},
_initializePositioning: function(){
this.itemCount = this.children.length;
this.barWidth = (this.isHorizontal ? this.itemCount : 1) * this.itemWidth;
this.barHeight = (this.isHorizontal ? 1 : this.itemCount) * this.itemHeight;
this.totalWidth = this.proximityLeft + this.proximityRight + this.barWidth;
this.totalHeight = this.proximityTop + this.proximityBottom + this.barHeight;
//
// calculate effect ranges for each item
//
for(var i=0; i<this.children.length; i++){
this.children[i].posX = this.itemWidth * (this.isHorizontal ? i : 0);
this.children[i].posY = this.itemHeight * (this.isHorizontal ? 0 : i);
this.children[i].cenX = this.children[i].posX + (this.itemWidth / 2);
this.children[i].cenY = this.children[i].posY + (this.itemHeight / 2);
var isz = this.isHorizontal ? this.itemWidth : this.itemHeight;
var r = this.effectUnits * isz;
var c = this.isHorizontal ? this.children[i].cenX : this.children[i].cenY;
var lhs = this.isHorizontal ? this.proximityLeft : this.proximityTop;
var rhs = this.isHorizontal ? this.proximityRight : this.proximityBottom;
var siz = this.isHorizontal ? this.barWidth : this.barHeight;
var range_lhs = r;
var range_rhs = r;
if(range_lhs > c+lhs){ range_lhs = c+lhs; }
if(range_rhs > (siz-c+rhs)){ range_rhs = siz-c+rhs; }
this.children[i].effectRangeLeft = range_lhs / isz;
this.children[i].effectRangeRght = range_rhs / isz;
//dojo.debug('effect range for '+i+' is '+range_lhs+'/'+range_rhs);
}
//
// create the bar
//
this.domNode.style.width = this.barWidth + 'px';
this.domNode.style.height = this.barHeight + 'px';
//
// position the items
//
for(var i=0; i<this.children.length; i++){
var itm = this.children[i];
var elm = itm.domNode;
elm.style.left = itm.posX + 'px';
elm.style.top = itm.posY + 'px';
elm.style.width = this.itemWidth + 'px';
elm.style.height = this.itemHeight + 'px';
itm.imgNode.style.left = this.itemPadding+'%';
itm.imgNode.style.top = this.itemPadding+'%';
itm.imgNode.style.width = (100 - 2 * this.itemPadding) + '%';
itm.imgNode.style.height = (100 - 2 * this.itemPadding) + '%';
}
//
// calc the grid
//
this._calcHitGrid();
},
_overElement: function(/* DomNode|String */node, /* Event */e){
// summary:
// Returns whether the mouse is over the passed element.
// Node: Must must be display:block (ie, not a <span>)
node = dojo.byId(node);
var mouse = {x: e.pageX, y: e.pageY};
var bb = dojo._getBorderBox(node);
var absolute = dojo.coords(node, true);
var top = absolute.y;
var bottom = top + bb.h;
var left = absolute.x;
var right = left + bb.w;
return (mouse.x >= left
&& mouse.x <= right
&& mouse.y >= top
&& mouse.y <= bottom
); // boolean
},
_onBodyOut: function(/*Event*/ e){
// clicking over an object inside of body causes this event to fire; ignore that case
if( this._overElement(dojo.body(), e) ){
return;
}
this._setDormant(e);
},
_setDormant: function(/*Event*/ e){
// summary: called when mouse moves out of menu's range
if(!this.isOver){ return; } // already dormant?
this.isOver = false;
if(this.conservativeTrigger){
// user can't re-trigger the menu expansion
// until he mouses over a icon again
dojo.disconnect(this._onMouseMoveHandle);
}
this._onGridMouseMove(-1, -1);
},
_setActive: function(/*Event*/ e){
// summary: called when mouse is moved into menu's range
if(this.isOver){ return; } // already activated?
this.isOver = true;
if(this.conservativeTrigger){
// switch event handlers so that we handle mouse events from anywhere near
// the menu
this._onMouseMoveHandle = dojo.connect(document.documentElement, "onmousemove", this, "_onMouseMove");
this.timerScale=0.0;
// call mouse handler to do some initial necessary calculations/positioning
this._onMouseMove(e);
// slowly expand the icon size so it isn't jumpy
this._expandSlowly();
}
},
_onMouseMove: function(/*Event*/ e){
// summary: called when mouse is moved
if( (e.pageX >= this.hitX1) && (e.pageX <= this.hitX2) &&
(e.pageY >= this.hitY1) && (e.pageY <= this.hitY2) ){
if(!this.isOver){
this._setActive(e);
}
this._onGridMouseMove(e.pageX-this.hitX1, e.pageY-this.hitY1);
}else{
if(this.isOver){
this._setDormant(e);
}
}
},
_onScroll: function(){
this._calcHitGrid();
},
onResized: function(){
this._calcHitGrid();
},
_onGridMouseMove: function(x, y){
// summary: called when mouse is moved in the vicinity of the menu
this.pos = {x:x, y:y};
this._paint();
},
_paint: function(){
var x=this.pos.x;
var y=this.pos.y;
if(this.itemCount <= 0){ return; }
//
// figure out our main index
//
var pos = this.isHorizontal ? x : y;
var prx = this.isHorizontal ? this.proximityLeft : this.proximityTop;
var siz = this.isHorizontal ? this.itemWidth : this.itemHeight;
var sim = this.isHorizontal ?
(1.0-this.timerScale)*this.itemWidth + this.timerScale*this.itemMaxWidth :
(1.0-this.timerScale)*this.itemHeight + this.timerScale*this.itemMaxHeight ;
var cen = ((pos - prx) / siz) - 0.5;
var max_off_cen = (sim / siz) - 0.5;
if(max_off_cen > this.effectUnits){ max_off_cen = this.effectUnits; }
//
// figure out our off-axis weighting
//
var off_weight = 0;
if(this.anchorEdge == this.EDGE.BOTTOM){
var cen2 = (y - this.proximityTop) / this.itemHeight;
off_weight = (cen2 > 0.5) ? 1 : y / (this.proximityTop + (this.itemHeight / 2));
}
if(this.anchorEdge == this.EDGE.TOP){
var cen2 = (y - this.proximityTop) / this.itemHeight;
off_weight = (cen2 < 0.5) ? 1 : (this.totalHeight - y) / (this.proximityBottom + (this.itemHeight / 2));
}
if(this.anchorEdge == this.EDGE.RIGHT){
var cen2 = (x - this.proximityLeft) / this.itemWidth;
off_weight = (cen2 > 0.5) ? 1 : x / (this.proximityLeft + (this.itemWidth / 2));
}
if(this.anchorEdge == this.EDGE.LEFT){
var cen2 = (x - this.proximityLeft) / this.itemWidth;
off_weight = (cen2 < 0.5) ? 1 : (this.totalWidth - x) / (this.proximityRight + (this.itemWidth / 2));
}
if(this.anchorEdge == this.EDGE.CENTER){
if(this.isHorizontal){
off_weight = y / (this.totalHeight);
}else{
off_weight = x / (this.totalWidth);
}
if(off_weight > 0.5){
off_weight = 1 - off_weight;
}
off_weight *= 2;
}
//
// set the sizes
//
for(var i=0; i<this.itemCount; i++){
var weight = this._weighAt(cen, i);
if(weight < 0){weight = 0;}
this._setItemSize(i, weight * off_weight);
}
//
// set the positions
//
var main_p = Math.round(cen);
var offset = 0;
if(cen < 0){
main_p = 0;
}else if(cen > this.itemCount - 1){
main_p = this.itemCount -1;
}else{
offset = (cen - main_p) * ((this.isHorizontal ? this.itemWidth : this.itemHeight) - this.children[main_p].sizeMain);
}
this._positionElementsFrom(main_p, offset);
},
_weighAt: function(/*Integer*/ cen, /*Integer*/ i){
var dist = Math.abs(cen - i);
var limit = ((cen - i) > 0) ? this.children[i].effectRangeRght : this.children[i].effectRangeLeft;
return (dist > limit) ? 0 : (1 - dist / limit); // Integer
},
_setItemSize: function(p, scale){
scale *= this.timerScale;
var w = Math.round(this.itemWidth + ((this.itemMaxWidth - this.itemWidth ) * scale));
var h = Math.round(this.itemHeight + ((this.itemMaxHeight - this.itemHeight) * scale));
if(this.isHorizontal){
this.children[p].sizeW = w;
this.children[p].sizeH = h;
this.children[p].sizeMain = w;
this.children[p].sizeOff = h;
var y = 0;
if(this.anchorEdge == this.EDGE.TOP){
y = (this.children[p].cenY - (this.itemHeight / 2));
}else if(this.anchorEdge == this.EDGE.BOTTOM){
y = (this.children[p].cenY - (h - (this.itemHeight / 2)));
}else{
y = (this.children[p].cenY - (h / 2));
}
this.children[p].usualX = Math.round(this.children[p].cenX - (w / 2));
this.children[p].domNode.style.top = y + 'px';
this.children[p].domNode.style.left = this.children[p].usualX + 'px';
}else{
this.children[p].sizeW = w;
this.children[p].sizeH = h;
this.children[p].sizeOff = w;
this.children[p].sizeMain = h;
var x = 0;
if(this.anchorEdge == this.EDGE.LEFT){
x = this.children[p].cenX - (this.itemWidth / 2);
}else if (this.anchorEdge == this.EDGE.RIGHT){
x = this.children[p].cenX - (w - (this.itemWidth / 2));
}else{
x = this.children[p].cenX - (w / 2);
}
this.children[p].domNode.style.left = x + 'px';
this.children[p].usualY = Math.round(this.children[p].cenY - (h / 2));
this.children[p].domNode.style.top = this.children[p].usualY + 'px';
}
this.children[p].domNode.style.width = w + 'px';
this.children[p].domNode.style.height = h + 'px';
if(this.children[p].svgNode){
this.children[p].svgNode.setSize(w, h);
}
},
_positionElementsFrom: function(p, offset){
var pos = 0;
if(this.isHorizontal){
pos = Math.round(this.children[p].usualX + offset);
this.children[p].domNode.style.left = pos + 'px';
}else{
pos = Math.round(this.children[p].usualY + offset);
this.children[p].domNode.style.top = pos + 'px';
}
this._positionLabel(this.children[p]);
// position before
var bpos = pos;
for(var i=p-1; i>=0; i--){
bpos -= this.children[i].sizeMain;
if (this.isHorizontal){
this.children[i].domNode.style.left = bpos + 'px';
}else{
this.children[i].domNode.style.top = bpos + 'px';
}
this._positionLabel(this.children[i]);
}
// position after
var apos = pos;
for(var i=p+1; i<this.itemCount; i++){
apos += this.children[i-1].sizeMain;
if(this.isHorizontal){
this.children[i].domNode.style.left = apos + 'px';
}else{
this.children[i].domNode.style.top = apos + 'px';
}
this._positionLabel(this.children[i]);
}
},
_positionLabel: function(itm){
var x = 0;
var y = 0;
var mb = dojo.marginBox(itm.lblNode);
if(this.labelEdge == this.EDGE.TOP){
x = Math.round((itm.sizeW / 2) - (mb.w / 2));
y = -mb.h;
}
if(this.labelEdge == this.EDGE.BOTTOM){
x = Math.round((itm.sizeW / 2) - (mb.w / 2));
y = itm.sizeH;
}
if(this.labelEdge == this.EDGE.LEFT){
x = -mb.w;
y = Math.round((itm.sizeH / 2) - (mb.h / 2));
}
if(this.labelEdge == this.EDGE.RIGHT){
x = itm.sizeW;
y = Math.round((itm.sizeH / 2) - (mb.h / 2));
}
itm.lblNode.style.left = x + 'px';
itm.lblNode.style.top = y + 'px';
},
_calcHitGrid: function(){
var pos = dojo.coords(this.domNode, true);
this.hitX1 = pos.x - this.proximityLeft;
this.hitY1 = pos.y - this.proximityTop;
this.hitX2 = this.hitX1 + this.totalWidth;
this.hitY2 = this.hitY1 + this.totalHeight;
},
_toEdge: function(inp, def){
return this.EDGE[inp.toUpperCase()] || def;
},
_expandSlowly: function(){
// summary: slowly expand the image to user specified max size
if(!this.isOver){ return; }
this.timerScale += 0.2;
this._paint();
if(this.timerScale<1.0){
setTimeout(dojo.hitch(this, "_expandSlowly"), 10);
}
},
destroyRecursive: function(){
// need to disconnect when we destroy
dojo.disconnect(this._onMouseOutHandle);
dojo.disconnect(this._onMouseMoveHandle);
dojo.disconnect(this._addChildHandle);
if (this.isFixed) { dojo.disconnect(this._onScrollHandle); }
dojo.disconnect(this._onResizeHandle);
this.inherited("destroyRecursive",arguments);
}
});
dojo.declare("dojox.widget.FisheyeListItem", [dijit._Widget, dijit._Templated, dijit._Contained], {
/*
* summary
* Menu item inside of a FisheyeList.
* See FisheyeList documentation for details on usage.
*/
// iconSrc: String
// pathname to image file (jpg, gif, png, etc.) of icon for this menu item
iconSrc: "",
// label: String
// label to print next to the icon, when it is moused-over
label: "",
// id: String
// will be set to the id of the orginal div element
id: "",
templateString:
'<div class="dojoxFisheyeListItem">' +
' <img class="dojoxFisheyeListItemImage" dojoAttachPoint="imgNode" dojoAttachEvent="onmouseover:onMouseOver,onmouseout:onMouseOut,onclick:onClick">' +
' <div class="dojoxFisheyeListItemLabel" dojoAttachPoint="lblNode"></div>' +
'</div>',
_isNode: function(/* object */wh){
// summary:
// checks to see if wh is actually a node.
if(typeof Element == "function") {
try{
return wh instanceof Element; // boolean
}catch(e){}
}else{
// best-guess
return wh && !isNaN(wh.nodeType); // boolean
}
},
_hasParent: function(/*Node*/node){
// summary:
// returns whether or not node is a child of another node.
return Boolean(node && node.parentNode && this._isNode(node.parentNode)); // boolean
},
postCreate: function() {
// set image
if((this.iconSrc.toLowerCase().substring(this.iconSrc.length-4)==".png") && dojo.isIE < 7){
/* we set the id of the new fisheyeListItem to the id of the div defined in the HTML */
if(this._hasParent(this.imgNode) && this.id != ""){
var parent = this.imgNode.parentNode;
parent.setAttribute("id", this.id);
}
this.imgNode.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+this.iconSrc+"', sizingMethod='scale')";
this.imgNode.src = this._blankGif.toString();
}else{
if(this._hasParent(this.imgNode) && this.id != ""){
var parent = this.imgNode.parentNode;
parent.setAttribute("id", this.id);
}
this.imgNode.src = this.iconSrc;
}
// Label
if(this.lblNode){
this.lblNode.appendChild(document.createTextNode(this.label));
}
dojo.setSelectable(this.domNode, false);
this.startup();
},
startup: function(){
this.parent = this.getParent();
},
onMouseOver: function(/*Event*/ e){
// summary: callback when user moves mouse over this menu item
// in conservative mode, don't activate the menu until user mouses over an icon
if(!this.parent.isOver){
this.parent._setActive(e);
}
if(this.label != "" ){
dojo.addClass(this.lblNode, "dojoxFishSelected");
this.parent._positionLabel(this);
}
},
onMouseOut: function(/*Event*/ e){
// summary: callback when user moves mouse off of this menu item
dojo.removeClass(this.lblNode, "dojoxFishSelected");
},
onClick: function(/*Event*/ e){
// summary: user overridable callback when user clicks this menu item
}
});
