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| 1 | +// Color Mixer |
| 2 | +// Brian Arnold |
| 3 | +// MIT licensed, though I doubt you'd actually want to take any of it yet. |
| 4 | + |
| 5 | +// Dojo Requires |
| 6 | +dojo.require('dojo.Stateful'); |
| 7 | +dojo.require('dijit.ColorPalette'); |
| 8 | +dojo.require('dijit.form.HorizontalSlider'); |
| 9 | + |
| 10 | +// Variables |
| 11 | +// (I realize global isn't always great, but this is just a simple demo) |
| 12 | +var left, right, slider, result; |
| 13 | + |
| 14 | +// Functions |
| 15 | + |
| 16 | +// rndCol: Just a simple way to get a random color |
| 17 | +function rndCol() { |
| 18 | + var i, cols = new Array(3); |
| 19 | + |
| 20 | + for (i = 0; i < 3; i++) { |
| 21 | + cols[i] = Math.floor(Math.random() * 256); |
| 22 | + } |
| 23 | + |
| 24 | + return dojo.colorFromArray(cols); |
| 25 | +} |
| 26 | + |
| 27 | +// colChange: Will be used in a watch callback for left and right colors |
| 28 | +function colChange(prop, oldCol, newCol) { |
| 29 | + // Set the node's background |
| 30 | + var node = this.get('displayNode'), newColHex = newCol.toHex(); |
| 31 | + console.log('colChange', this, prop, oldCol, newCol); |
| 32 | + |
| 33 | + // If we have the same color, we can just get out |
| 34 | + if (oldCol && newCol && oldCol.toHex() === newColHex) return; |
| 35 | + |
| 36 | + // If we have a node, work it |
| 37 | + if (node) { |
| 38 | + node.innerHTML = newColHex |
| 39 | + node.style.backgroundColor = newColHex; |
| 40 | + } |
| 41 | +} |
| 42 | + |
| 43 | +// colChangeAndMix: A slight tweak to not just change, but kick off a mix |
| 44 | +function colChangeAndMix(prop, oldCol, newCol) { |
| 45 | + // Run the colChange first |
| 46 | + colChange.apply(this, arguments); |
| 47 | + |
| 48 | + // Kick off a mix |
| 49 | + mixCols(slider.get('value')); |
| 50 | +} |
| 51 | + |
| 52 | +// mixCols: Just something to mix the two colors if they exist |
| 53 | +function mixCols(val) { |
| 54 | + var leftCol = left.get('color'), |
| 55 | + rightCol = right.get('color'); |
| 56 | + |
| 57 | + console.log('mixCols()'); |
| 58 | + if (!leftCol || !rightCol) { |
| 59 | + // Just dump out for now |
| 60 | + return; |
| 61 | + } |
| 62 | + |
| 63 | + // TODO Animate |
| 64 | + result.set('color', dojo.blendColors(leftCol, rightCol, val)); |
| 65 | +} |
| 66 | + |
| 67 | +// Ready, do somethin' |
| 68 | +dojo.ready(function(){ |
| 69 | + // Set up a few Stateful items |
| 70 | + left = new dojo.Stateful({ |
| 71 | + color: null, |
| 72 | + palette: new dijit.ColorPalette({}, 'leftPal'), |
| 73 | + paletteNode: dojo.byId('leftPal'), |
| 74 | + displayNode: dojo.byId('leftCol') |
| 75 | + }); |
| 76 | + right = new dojo.Stateful({ |
| 77 | + color: null, |
| 78 | + palette: new dijit.ColorPalette({}, 'rightPal'), |
| 79 | + paletteNode: dojo.byId('rightPal'), |
| 80 | + displayNode: dojo.byId('rightCol') |
| 81 | + }); |
| 82 | + result = new dojo.Stateful({ |
| 83 | + color: null, |
| 84 | + displayNode: dojo.byId('resultCol') |
| 85 | + }); |
| 86 | + |
| 87 | + // Build a slider |
| 88 | + slider = new dijit.form.HorizontalSlider({ |
| 89 | + value: 0.5, |
| 90 | + minimum: 0, |
| 91 | + maximum: 1, |
| 92 | + //intermediateChanges: true, |
| 93 | + onChange: mixCols |
| 94 | + }, 'slider'); |
| 95 | + |
| 96 | + // Set up some events |
| 97 | + left.watch('color', colChangeAndMix); |
| 98 | + right.watch('color', colChangeAndMix); |
| 99 | + result.watch('color', colChange); |
| 100 | + |
| 101 | + // Tweak the left and right |
| 102 | + dojo.forEach([left, right], function (item, i) { |
| 103 | + var pal = item.get('palette'), |
| 104 | + palNode = item.get('paletteNode'); |
| 105 | + disp = item.get('displayNode'); |
| 106 | + |
| 107 | + // Mmm, events |
| 108 | + dojo.connect(disp, "onclick", function () { |
| 109 | + palNode.style.visibility = 'visible'; |
| 110 | + }); |
| 111 | + dojo.connect(pal, 'onChange', function (col) { |
| 112 | + palNode.style.visibility = 'hidden'; |
| 113 | + item.set('color', dojo.colorFromHex(col)); |
| 114 | + }); |
| 115 | + |
| 116 | + // Set up some initial display |
| 117 | + palNode.style.visibility = 'hidden'; |
| 118 | + item.set('color', rndCol()); |
| 119 | + }); |
| 120 | + |
| 121 | + // Show it all |
| 122 | + dojo.byId('loading').style.display = 'none'; |
| 123 | + dojo.byId('content').style.display = ''; |
| 124 | +}); // dojo.ready |
| 125 | + |
| 126 | +// Vim settings, whee |
| 127 | +// vim: set sw=4 ts=4 noet: |
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