svgedit/editor/extensions/ext-star.js

/*
 * ext-star.js
 *
 *
 * Copyright(c) 2010 CloudCanvas, Inc.
 * All rights reserved
 *
 */

svgEditor.addExtension('star', function(S){

	var NS = svgedit.NS,
		svgcontent = S.svgcontent,
		selElems,
		editingitex = false,
		svgdoc = S.svgroot.parentNode.ownerDocument,
		started,
		newFO,
		edg = 0,
		newFOG,
		newFOGParent,
		newDef,
		newImageName,
		newMaskID,
		undoCommand = 'Not image',
		modeChangeG,
		ccZoom,
		wEl,
		hEl,
		wOffset,
		hOffset,
		ccRgbEl,
		brushW,
		brushH,
		shape;

	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 rgb = svgCanvas.getColor('fill');
			var ccRgbEl = rgb.substring(1, rgb.length);
			var sRgb = svgCanvas.getColor('stroke');
			var ccSRgbEl = sRgb.substring(1, rgb.length);
			var 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 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);
					}

					x = (circumradius * Math.cos(angle)) + cx;
					y = (circumradius * Math.sin(angle)) + cy;

					polyPoints += x + ',' + y + ' ';

					if (null != inradius) {
						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;

						x = (inradius * Math.cos(angle)) + cx;
						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(){
			if (svgCanvas.getMode() == 'star') {
				var attrs = $(newFO).attr(['r']);
				// svgCanvas.addToSelection([newFO], true);
				return {
					keep: (attrs.r != 0),
					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];
		}
	};
});