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two points!

master
dickreckard 5 years ago
parent
commit
8ea8d53386
  1. 33
      index.html
  2. 1
      js/Pathslider
  3. 402
      js/jquery.pathslider.js

33
index.html

@ -3,24 +3,43 @@
<head>
<meta charset="utf-8">
<script type="text/javascript" src="js/jquery-3.4.1.min.js"></script>
<script type="text/javascript" src="js/Pathslider/js/jquery.pathslider.js"></script>
<script type="text/javascript" src="js/jquery.pathslider.js"></script>
<link rel="stylesheet" type="text/css" href="css/stylesheet.css">
<link rel="stylesheet" type="text/css" href="css/pathslider.css">
</head>
<body>
<!-- The curved slider -->
<div id="slider"></div>
<div id="slider"></div> <div id="slider2"></div>
<style>
#slider {
background : #eee url();
width : 241px;
height : 266px;
position: absolute;
top:0;
left:0;
width : 100%;
height : 400px;
background: transparent;
}
#slider2 {
position: absolute;
top:0;
left:0;
width : 100%;
height : 400px;
background: transparent;
}
</style>
<script>
jQuery(function($){
$("#slider").pathslider({
points : [50,10,-150,0,150,300,200,50],
points : [50,10,-150,0,150,200,300,100],
value : 49,
rotateGrip : true,
tolerance : 3,
range : 30,
curve : { width:4, color:"#333", cap:"round" }
});
$("#slider2").pathslider({
points : [490,300,-150,0,-200,-200,300,100],
value : 49,
rotateGrip : true,
tolerance : 3,
@ -35,4 +54,4 @@
</div>
</body>
</html>
</html>

1
js/Pathslider

@ -1 +0,0 @@
Subproject commit 633a5cba0a5149fa3085dff2cb0a8e7e324b1215

402
js/jquery.pathslider.js

@ -0,0 +1,402 @@
/* jQuery Pathslider v1.0.0 alpha
* By Rob Garrison (Mottie)
* MIT License
*/
(function($){
$.pathslider = function(el, options){
// To avoid scope issues, use 'base' instead of 'this'
// to reference this class from internal events and functions.
var base = this, o;
// Access to jQuery and DOM versions of element
base.$el = $(el).addClass('pathslider');
base.el = el;
// Add a reverse reference to the DOM object
base.$el.data("pathslider", base);
base.init = function(){
var t;
base.options = o = $.extend(true, {}, $.pathslider.defaults, options);
// Is there a canvas?
t = document.createElement('canvas');
base.hasCanvas = !!(t.getContext && t.getContext('2d'));
base.hasTouch = document.hasOwnProperty("ontouchend");
// add grip
base.$grip = $('<div></div>').appendTo(base.$el);
// store array of x & y positions for cross reference
base.points = [];
base.pointsxy = [];
base.arrayX = [];
base.arrayY = [];
base.arrayP = [];
base.rad2deg = 180 / Math.PI; // convert radians to degrees (multiply radian by this value)
base.sliding = false; // flag for dragging element
base.lastPercent = base.percent = o.value;
// Callbacks
// slide triggered on EVERY mouse move; change triggered on slide stop
$.each('create update start slide change stop'.split(' '), function(i,f){
if ($.isFunction(o[f])){
base.$el.bind(f + '.pathslider', o[f]);
}
});
$(document)
.bind( base.hasTouch ? 'touchend.pathslider touchcancel.pathslider' : 'mouseup.pathslider mouseleave.pathslider', function(e){
if (base.sliding) { // && ($(e.target).closest('.pathslider').length || e.type === 'mouseleave')) {
base.$el.trigger('stop.pathslider', [base]);
if (base.lastPercent !== base.percent) {
base.lastPercent = base.percent;
base.$el.trigger('change.pathslider', [base]);
}
}
base.$grip.removeClass('sliding');
base.sliding = false;
})
.bind( (base.hasTouch ? 'touchmove' : 'mousemove') + '.pathslider', function(e){
if (base.sliding) {
base.setSlider( base.findPos(e), null, true );
}
});
$(window)
.bind('resize.pathslider', function(){
base.update();
})
.bind('load', function(){
// needed because loading images/fonts will shift the page
base.sliderDim[0] = base.$el.offset().left;
base.sliderDim[1] = base.$el.offset().top;
});
base.$grip
.bind( (base.hasTouch ? 'touchstart' : 'mousedown') + '.pathslider', function(e){
base.sliding = true;
$(this).addClass('sliding');
base.$el.trigger('start.pathslider', [base]);
return false;
})
.bind('click', function(){
return false;
});
base.redraw();
base.$el.trigger('create.pathslider', [base]);
};
// update dimensions & grip position
base.update = function(){
// using attr to remove other css grip classes when updating
base.$grip.attr('class', 'pathslider-grip ' + o.gripClass);
if (base.ctx) {
// clear canvas *before* setting new dimensions
// just in case the new size is smaller than the previous
base.ctx.clearRect(0, 0, base.sliderDim[2], base.sliderDim[3]);
}
base.sliderDim = [
base.$el.offset().left,
base.$el.offset().top,
base.$el.width(),
base.$el.height()
];
// get grip dimensions; jQuery v3+ width() & height() return the rotated dimensions
// which we don't want!
var computedStyle = window.getComputedStyle(base.$grip[0]);
// for centering grip
base.gripCenter = [ parseInt(computedStyle.width, 10)/2, parseInt(computedStyle.height, 10)/2 ];
// number of data points to store - increase to smooth the animation (based on slider size)
base.dataPoints = o.dataPoints;
// in next update add min/max/step
// base.range = o.max - o.min;
// base.dataPoints = base.range * o.step;
base.makeArray();
// save the position in the array of the starting value (roughly)
var t = $.inArray(base.percent, base.arrayP);
base.position = (t === -1) ? Math.round(base.percent/100 * base.dataPoints) : t;
base.setSlider(base.percent, null, true);
if (base.hasCanvas && o.useCanvas) { base.drawCurve(); }
};
// set position of slider
base.setSlider = function(percent, callback, internal) {
if (!isNaN(percent)) {
// find position on bezier curve; p = percent (range 0 - 100)
// set position of slider without using the array (more precision)
percent = parseFloat(percent, 10);
percent = (percent > 100) ? 100 : percent < 0 ? 0 : percent;
var css, angle,
// pos = $.inArray(percent, base.arrayP),
p = base.calcBezier(percent/100, base.pointsxy),
pm1 = (percent - 2 > 0) ? base.calcBezier( (percent-2)/100, base.pointsxy ) : p,
pp1 = (percent + 2 < 100) ? base.calcBezier( (percent+2)/100, base.pointsxy ) : p,
// m = slope of tangent - used to change rotation angle of the grip
// yes, I could have used the cubic derivative, but this is less math
m = (pp1[0] - pm1[0] === 0) ? 90 : (pp1[1] - pm1[1])/(pp1[0] - pm1[0]);
base.angle = parseInt(Math.atan(m) * base.rad2deg, 10);
angle = 'rotate(' + base.angle + 'deg)';
css = (o.rotateGrip) ? {
'-webkit-transform' : angle,
'transform' : angle
} : {};
css.left = p[0] - base.gripCenter[0];
css.top = p[1] - base.gripCenter[1];
base.$grip
.attr({
'data-angle' : base.angle,
'data-percent' : percent
})
.css(css);
// find closest percent in the array - this relies on there being a factor
// of 100 datapoints, so it'll need changing when we have a min/max/step
base.percent = percent; // Math.round(percent*r)/r;
if ((percent !== base.lastPercent && !base.sliding) || !internal) {
base.$el.trigger('change.pathslider', [base]);
}
}
if (typeof callback === 'function') { callback(base); }
};
// relative mouse position
base.mousePos = function(e) {
return [
(e.originalEvent.touches ? e.originalEvent.touches[0].pageX : e.pageX) - base.sliderDim[0],
(e.originalEvent.touches ? e.originalEvent.touches[0].pageY : e.pageY) - base.sliderDim[1]
];
};
// find percentage given the x,y coordinates
// searching through a set array of points starting from the last known position
// This allows the curve to loop over itself without mixing up intersecting points
// The biggest issue is a very sharp turn
base.findPos = function(event) {
var i, j, dx, dy, px = [], py = [],
last = base.position, //* base.dataPoints / 100,
// check x & y cross ref based on nearby positions (+/- tolerance)
t = parseInt(o.tolerance + 1, 10) || 2, // tolerance of 1 is too small
r = parseInt(o.range, 10) || base.gripCenter[0], // set to 1/2 width of grip
pos = base.mousePos(event);
// save percent
for ( i=0; i < r; i++ ){
px = []; py = [];
for ( j=0; j < t + 1; j++ ){
// check positive direction
dx = Math.abs(base.arrayX[last+j] - pos[0]) <= i;
dy = Math.abs(base.arrayY[last+j] - pos[1]) <= i;
if (dx && dy) { return base.returnPos(last+j); }
if (dx) { px.push(last+j); }
if (dy) { py.push(last+j); }
// check in negative direction
dx = Math.abs(base.arrayX[last-j] - pos[0]) <= i;
dy = Math.abs(base.arrayY[last-j] - pos[1]) <= i;
if (dx && dy) { return base.returnPos(last-j); }
if (dx) { px.push(last-j); }
if (dy) { py.push(last-j); }
}
if (px.length === 1 && py.length > 1) { return base.returnPos(px[0]); }
if (py.length === 1 && px.length > 1) { return base.returnPos(py[0]); }
}
return base.returnPos(last);
};
// return found position & trigger slide event
base.returnPos = function(p) {
var t = base.position === p;
base.percent = base.arrayP[p];
base.position = p;
if (!t) {
if (base.hasCanvas && o.useCanvas) {
base.drawCurve();
}
base.$el.trigger('slide.pathslider', [base] );
}
return base.percent;
};
// build cross-ref array - find position based on x,y coords
base.makeArray = function(){
var i, t, b = base.pointsxy,
n = base.dataPoints;
for ( i=0; i < n+1; i++ ){
t = base.calcBezier(i/n, b);
base.arrayX[i] = t[0];
base.arrayY[i] = t[1];
base.arrayP[i] = t[2];
}
};
// Calculate bezier x & y based on percentage (p)
// cubic bezier = start(p^3) + cstart(3*p^2*(1−p)) + cend(3*p*(1−p)^2) + end(1−p)^3
// b = [ startx,starty, cstartx,cstarty, cendx,cendy, endx,endy ]
base.calcBezier = function(p,b){
var p2 = p*p,
omp = (1-p), // omp = one minus p - smart naming ftw!
omp2 = omp*omp,
f1 = omp*omp2,
f2 = 3*p*omp2,
f3 = 3*p2*omp,
f4 = p*p2;
return [
Math.round(b[0]*f1 + b[2]*f2 + b[4]*f3 + b[6]*f4), // bezier x
Math.round(b[1]*f1 + b[3]*f2 + b[5]*f3 + b[7]*f4), // bezier y
Math.round(p*1000)/10 // percentage with one decimal place
];
};
// base.points = [ sx,sy, csxo,csyo, cexo,ceyo, ex,ey ]
// sx,sy = start x & y
// csxo,csyo = control start x & y offset from start point
// cexo,ceyo = control end x & y offset from end point
// ex,ey = end x & y
// convert needed for canvas - using the offset just makes the code easier to read
// base.pointsxy = [ sx, sy, csx, csy, cex, cey, ex, ey ]
base.convert2xy = function(p){
p = p || base.points;
return [
p[0], p[1], // start x,y
p[0] + p[2], p[1] + p[3], // start control x,y
p[6] + p[4], p[7] + p[5], // end control x,y
p[6], p[7] // end x,y
];
};
base.redraw = function(points) {
// update from options
base.points = base.options.points = points || base.options.points;
// store array of x & y positions for cross reference
base.pointsxy = base.convert2xy();
// update grip
base.update();
// update curve
base.drawCurve();
base.setSlider(base.percent, null, true);
};
// Make purdy curve
base.drawCurve = function() {
var ctx, grad, tmp,
points = base.pointsxy;
if (!base.$el.find('canvas').length) {
$('<canvas class="pathslider-canvas"></canvas>').appendTo(base.$el);
// size in attribute needed to keep canvas size in proportion
base.$canvas = base.$el.find('canvas').attr({ width: base.sliderDim[2], height: base.sliderDim[3] });
base.canvas = base.$canvas[0];
base.ctx = base.canvas.getContext("2d");
}
ctx = base.ctx;
ctx.clearRect(0, 0, base.sliderDim[2], base.sliderDim[3]);
ctx.lineCap = o.curve.cap;
ctx.lineJoin = o.curve.cap;
ctx.lineWidth = o.curve.width;
// this can be a gradient or image as well. See
// https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Applying_styles_and_colors
if ($.isArray(o.curve.color)) {
grad = ctx.createLinearGradient(points[0], points[1], points[6], points[7]);
tmp = base.percent/100;
grad.addColorStop(0, o.curve.color[0]);
grad.addColorStop(tmp, o.curve.color[0]);
if (tmp + 0.01 <= 1) { tmp += 0.01; }
grad.addColorStop(tmp, o.curve.color[1]);
grad.addColorStop(1, o.curve.color[1]);
ctx.strokeStyle = grad;
} else {
ctx.strokeStyle = o.curve.color;
}
tmp = true;
if (typeof o.drawCanvas === 'function') {
// return anything except false to continue drawing the curve
tmp = o.drawCanvas(base, ctx, points) !== false;
ctx = base.ctx;
}
// tmp returned from drawCanvas; if
if (tmp === true) {
base.finishCurve(ctx, points);
}
};
base.finishCurve = function(ctx, points) {
ctx = ctx || base.ctx;
points = points || base.pointsxy;
ctx.beginPath();
ctx.moveTo(points[0], points[1]);
ctx.bezierCurveTo(points[2], points[3], points[4], points[5], points[6], points[7]);
ctx.stroke();
};
// Run initializer
base.init();
};
$.pathslider.defaults = {
// Appearance
gripClass : '', // class added to the grip/handle
rotateGrip : true, // when true, the grip will rotate based on the shape of the path
// canvas curve styling
useCanvas : true,
curve : { width: 4, color: "#333", cap: "round" },
// Usability
// sx,sy = start x & y
// csxo,csyo = control start x & y offset from start point
// cexo,ceyo = control end x & y offset from end point
// ex,ey = end x & y
// [ sx,sy, csxo,csyo, cexo,ceyo, ex,ey ]
points : [ 0,50, 50,-50, -50,-50, 250,50 ],
value : 50, // starting value - range 0 - 100%
// min : 0, // minimum value on the slider
// max : 100, // maximum value on the slider
// step : 1, // step to use between min and max
// Tweaking
dataPoints: 100, // Total number of points of the curve to save; increase in increments of 100 to smooth out the grip movement, but not more than 500 (it slows everything down)
tolerance : 3, // distance on the curve from the last position to check; increase this to scroll faster
range : 30 // distance, in pixels, from the cursor to a matching x/y on the curve (should be about the same size as the grip)
};
$.fn.pathslider = function(options, callback){
return this.each(function(){
var percent, slider = $(this).data('pathslider');
// initialize the slider but prevent multiple initializations
if ((typeof(options)).match('object|undefined')){
if (!slider) {
(new $.pathslider(this, options));
} else {
return slider.redraw();
}
// If options is a number, set percentage
} else if (/\d/.test(options) && !isNaN(options) && slider) {
percent = (typeof(options) === "number") ? options : parseInt($.trim(options),10); // accepts " 2 "
// ignore out of bound percentages
if ( percent >= 0 && percent <= 100 ) {
slider.setSlider(percent, callback); // set percent & callback
}
}
});
};
$.fn.getpathslider = function(){
return this.data('pathslider');
};
})(jQuery);
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