svgedit/editor/extensions/ext-star.js

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/*
* ext-star.js
*
*
* Copyright(c) 2010 CloudCanvas, Inc.
* All rights reserved
*
*/
svgEditor.addExtension("star", function(S){
var svgcontent = S.svgcontent, addElem = S.addSvgElementFromJson, selElems, svgns = "http://www.w3.org/2000/svg", xlinkns = "http://www.w3.org/1999/xlink", xmlns = "http://www.w3.org/XML/1998/namespace", xmlnsns = "http://www.w3.org/2000/xmlns/", se_ns = "http://svg-edit.googlecode.com", htmlns = "http://www.w3.org/1999/xhtml", editingitex = false, svgdoc = S.svgroot.parentNode.ownerDocument, started, newFO, edg = 0, newFOG, newFOGParent, newDef, newImageName, newMaskID, undoCommand = "Not image", modeChangeG;
var ccZoom;
var wEl, hEl;
var wOffset, hOffset;
var ccRBG, ccRgbEl;
var ccOpacity;
var brushW, brushH, shape;
var ccDebug = document.getElementById('debugpanel');
function showPanel(on){
var fc_rules = $('#fc_rules');
if (!fc_rules.length) {
fc_rules = $('<style id="fc_rules"><\/style>').appendTo('head');
}
fc_rules.text(!on ? "" : " #tool_topath { display: none !important; }");
$('#star_panel').toggle(on);
}
function toggleSourceButtons(on){
$('#star_save, #star_cancel').toggle(on);
}
function setAttr(attr, val){
svgCanvas.changeSelectedAttribute(attr, val);
S.call("changed", selElems);
}
function cot(n){
return 1 / Math.tan(n);
};
function sec(n){
return 1 / Math.cos(n);
};
return {
name: "star",
svgicons: "extensions/star-icons.svg",
buttons: [{
id: "tool_star",
type: "mode",
title: "Star Tool",
position: 12,
events: {
'click': function(){
showPanel(true);
svgCanvas.setMode('star')
}
}
}],
context_tools: [{
type: "input",
panel: "star_panel",
title: "Number of Sides",
id: "starNumPoints",
label: "points",
size: 3,
defval: 5,
events: {
change: function(){
setAttr('point', this.value);
}
}
}, {
type: "input",
panel: "star_panel",
title: "Pointiness",
id: "starRadiusMulitplier",
label: "Pointiness",
size: 3,
defval: 2.5
}, {
type: "input",
panel: "star_panel",
title: "Twists the star",
id: "radialShift",
label: "Radial Shift",
size: 3,
defval: 0,
events: {
change: function(){
setAttr('radialshift', this.value);
}
}
}],
callback: function(){
$('#star_panel').hide();
var endChanges = function(){
}
},
mouseDown: function(opts){
var e = opts.event;
rgb = svgCanvas.getColor("fill");
ccRgbEl = rgb.substring(1, rgb.length);
sRgb = svgCanvas.getColor("stroke");
ccSRgbEl = sRgb.substring(1, rgb.length);
sRgb = svgCanvas.getColor("stroke");
sWidth = svgCanvas.getStrokeWidth();
if (svgCanvas.getMode() == "star") {
started = true;
newFO = S.addSvgElementFromJson({
"element": "polygon",
"attr": {
"cx": opts.start_x,
"cy": opts.start_y,
"id": S.getNextId(),
"shape": "star",
"point": document.getElementById('starNumPoints').value,
"r": 0,
"radialshift": document.getElementById('radialShift').value,
"r2": 0,
"orient": "point",
"fill": rgb,
"strokecolor": sRgb,
"strokeWidth": sWidth
}
});
return {
started: true
}
}
},
mouseMove: function(opts){
if (!started)
return;
if (svgCanvas.getMode() == "star") {
var e = opts.event;
var x = opts.mouse_x;
var y = opts.mouse_y;
var c = $(newFO).attr(["cx", "cy", "point", "orient", "fill", "strokecolor", "strokeWidth", "radialshift"]);
var cx = c.cx, cy = c.cy, fill = c.fill, strokecolor = c.strokecolor, strokewidth = c.strokeWidth, radialShift = c.radialshift, point = c.point, orient = c.orient, circumradius = (Math.sqrt((x - cx) * (x - cx) + (y - cy) * (y - cy))) / 1.5, inradius = circumradius / document.getElementById('starRadiusMulitplier').value;
newFO.setAttributeNS(null, "r", circumradius);
newFO.setAttributeNS(null, "r2", inradius);
var polyPoints = '';
for (var s = 0; point >= s; s++) {
var angle = 2.0 * Math.PI * (s / point);
if ('point' == orient) {
angle -= (Math.PI / 2);
}
else
if ('edge' == orient) {
angle = (angle + (Math.PI / point)) - (Math.PI / 2);
}
var x = (circumradius * Math.cos(angle)) + cx;
var y = (circumradius * Math.sin(angle)) + cy;
polyPoints += x + ',' + y + ' ';
if (null != inradius) {
var angle = (2.0 * Math.PI * (s / point)) + (Math.PI / point);
if ('point' == orient) {
angle -= (Math.PI / 2);
}
else
if ('edge' == orient) {
angle = (angle + (Math.PI / point)) - (Math.PI / 2);
}
angle += radialShift;
var x = (inradius * Math.cos(angle)) + cx;
var y = (inradius * Math.sin(angle)) + cy;
polyPoints += x + ',' + y + ' ';
}
}
newFO.setAttributeNS(null, 'points', polyPoints);
newFO.setAttributeNS(null, 'fill', fill);
newFO.setAttributeNS(null, 'stroke', strokecolor);
newFO.setAttributeNS(null, 'stroke-width', strokewidth);
shape = newFO.getAttributeNS(null, 'shape');
return {
started: true
}
}
},
mouseUp: function(opts){
if (svgCanvas.getMode() == "star") {
var attrs = $(newFO).attr(["r"]);
keep = (attrs.r != 0);
// svgCanvas.addToSelection([newFO], true);
return {
keep: keep,
element: newFO
}
}
},
selectedChanged: function(opts){
// Use this to update the current selected elements
selElems = opts.elems;
var i = selElems.length;
while (i--) {
var elem = selElems[i];
if (elem && elem.getAttributeNS(null, 'shape') == "star") {
if (opts.selectedElement && !opts.multiselected) {
// $('#starRadiusMulitplier').val(elem.getAttribute("r2"));
$('#starNumPoints').val(elem.getAttribute("point"));
$('#radialShift').val(elem.getAttribute("radialshift"));
showPanel(true);
}
else {
showPanel(false);
}
}
else {
showPanel(false);
}
}
},
elementChanged: function(opts){
var elem = opts.elems[0];
}
};
});