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experementing with css scale, origin and translate...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2014-10-15 09:06:10 +04:00
parent 9317ea0566
commit efcbea5b18
5 changed files with 366 additions and 27 deletions
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183
ui (gen4)/experiments/scale-origin.html Executable file
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@ -0,0 +1,183 @@
<!DOCTYPE html>
<html>
<style>
.container {
position: absolute;
top: 200px;
left: 400px;
width: 400px;
height: 400px;
border: dashed 1px black;
}
.container-center {
position: absolute;
top: 50%;
left: 50%;
width: 10px;
height: 10px;
border-top: solid 1px black;
border-left: solid 1px black;
}
.container-center:after {
content: "";
position: absolute;
top: -11px;
left: -11px;
width: 10px;
height: 10px;
border-top: none;
border-left: none;
border-bottom: solid 1px black;
border-right: solid 1px black;
}
.block {
position: absolute;
top: auto;
left: auto;
width: 300px;
height: 300px;
background: silver;
opacity: 0.8;
}
.point, .point-old {
position: absolute;
width: 4px;
height: 4px;
border: solid 1px blue;
margin-top: -2px;
margin-left: -2px;
transition-origin: 50% 50%;
}
.point-old {
opacity: 0.3;
}
.block, .point {
-webkit-transition: all 0.2s linear;
-moz-transition: all 0.2s linear;
transition: all 0.2s linear;
}
</style>
<script src="../ext-lib/jquery.js"></script>
<script src="../ext-lib/jquery-ui.js"></script>
<script src="../lib/jli.js"></script>
<script>
function setOffset(l, t){
setElementOffset($('.block'), l, t)
}
function setScale(s){
setElementScale($('.block'), s)
setElementScale($('.point'), 1/s)
setElementScale($('.point-old'), 1/s)
}
// The goal of the experiment is to make this do it's thing without
// changing element's screen position
//
// XXX this does not work of position is negative...
function setOrigin(l, t, no_comp){
var block = $('.block')
var o = getElementOrigin(block)
if(!no_comp){
var s = getElementScale(block)
var offset = getElementOffset(block)
// calculate the offset change and compensate...
// XXX this breaks with negative values...
// - starts moving around
// - the secondary pointer goes crazy...
var cl = offset.left + ((o.left - o.left*s) - (l - l*s))
var ct = offset.top + ((o.top - o.top*s) - (t - t*s))
setElementOffset(block, cl, ct)
}
setElementOrigin(block, l+'px', t+'px')
setElementOffset($('.point'), l, t)
setElementOffset($('.point-old'), o.left, o.top)
}
// center a specific point (default: origin)
//
// NOTE: scale indicates the source coordinate scale, if set to 1 t and
// l will 1:1 to screen, and if set the the same scale as the element
// then t and l will be 1:1 to the element...
// supported keywords:
// 'screen'
// 'elem'
function centerBlock(l, t, scale){
scale = scale == true || scale == 'screen' ? 1
: scale == 'elem' ? null
: scale
var s = getElementScale(block)
var block = $('.block')
var offset = getElementOffset(block)
var bo = block.offset()
var co = $('.container').offset()
var W = $('.container').width()
var H = $('.container').height()
var o = getElementOrigin(block)
// normalize the l,t to element scale...
if(l != null && t != null){
l = scale != null ? (l/s)*scale : l
t = scale != null ? (t/s)*scale : t
var w = block.width()
var h = block.height()
o = {
top: t*s + (h - h*s) / (w / o.left),
left: l*s + (w - w*s) / (h / o.left),
}
}
var dl = offset.left + (W/2 - offset.left) - o.left
var dt = offset.top + (H/2 - offset.top) - o.top
setOffset(dl, dt)
}
$(function(){
setOrigin(100, 100)
setOffset(50, 100)
setScale(0.7)
})
</script>
<body>
<div class="container">
<div class="block">
<div class="point" title="current origin point"> </div>
<div class="point-old" title="previous origin point"> </div>
</div>
<div class="container-center"> </div>
</div>
</body>
</html>
<!-- vim:set ts=4 sw=4 : -->

6
ui (gen4)/index.html
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@ -43,9 +43,9 @@
/* basic animation... */ /* basic animation... */
.viewer:not(.no-transitions) .ribbon-set { .viewer:not(.no-transitions) .ribbon-set {
-webkit-transition: all 0.2s ease, transform 0.2s linear; -webkit-transition: all 0.2s ease, transform 0.2s linear/*, transform-origin 0s none*/;
-moz-transition: all 0.2s ease, transform 0.2s linear; -moz-transition: all 0.2s ease, transform 0.2s linear/*, transform-origin 0s none*/;
transition: all 0.2s ease, transform 0.2s linear; transition: all 0.2s ease, transform 0.2s linear/*, transform-origin 0s none*/;
} }
.viewer:not(.no-transitions) .ribbon { .viewer:not(.no-transitions) .ribbon {

43
ui (gen4)/lib/jli.js
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@ -509,6 +509,19 @@ function makeCSSVendorAttrGetter(attr, dfl, callback){
} }
var getElementOrigin = makeCSSVendorAttrGetter(
'transformOrigin',
{top: 0, left: 0},
function(data){
res = /([0-9.]*(px|%)) ([0-9.]*(px|%))/.exec(data)
return {
left: res[1].slice(-2) == 'px' ? parseFloat(res[1]) : res[1],
top: res[3].slice(-2) == 'px' ? parseFloat(res[3]) : res[3],
}
})
// Return a scale value for the given element(s). // Return a scale value for the given element(s).
// NOTE: this will only return a single scale value... // NOTE: this will only return a single scale value...
var getElementScale = makeCSSVendorAttrGetter( var getElementScale = makeCSSVendorAttrGetter(
@ -519,7 +532,7 @@ var getElementScale = makeCSSVendorAttrGetter(
}) })
var getElementShift = makeCSSVendorAttrGetter( var getElementOffset = makeCSSVendorAttrGetter(
'transform', 'transform',
{left: 0, top: 0}, {left: 0, top: 0},
function(data){ function(data){
@ -544,7 +557,7 @@ function setElementTransform(elem, offset, scale, duration){
var t3d = USE_3D_TRANSFORM ? 'translate3d(0,0,0)' : '' var t3d = USE_3D_TRANSFORM ? 'translate3d(0,0,0)' : ''
if(offset == null){ if(offset == null){
offset = getElementShift(elem) offset = getElementOffset(elem)
// number -- only the x coord... // number -- only the x coord...
} else if(typeof(offset) == typeof(1)){ } else if(typeof(offset) == typeof(1)){
offset = { offset = {
@ -686,7 +699,7 @@ function animateElementTo(elem, to, duration, easing, speed, callback, use_trans
var start = Date.now() var start = Date.now()
var then = start + duration var then = start + duration
var from = getElementShift(elem) var from = getElementOffset(elem)
var cur = { var cur = {
top: from.top, top: from.top,
left: from.left left: from.left
@ -789,6 +802,11 @@ function stopAnimation(elem){
// XXX account for other transitions... // XXX account for other transitions...
function setElementOffset(elem, l, t){
return setElementTransform(elem, [l, t])
}
function setElementScale(elem, scale){ function setElementScale(elem, scale){
return setElementTransform(elem, null, scale) return setElementTransform(elem, null, scale)
} }
@ -802,11 +820,30 @@ function setElementOrigin(elem, x, y, z){
return $(elem).css({ return $(elem).css({
'transform-origin': value, 'transform-origin': value,
'-o-transform-origin': value,
'-ms-transform-origin': value, '-ms-transform-origin': value,
'-moz-transform-origin': value,
'-webkit-transform-origin': value, '-webkit-transform-origin': value,
}) })
} }
// this is like setElementOrigin(..) but will compensate for element
// shift when scaled...
// NOTE: this will work only of translate is used for positioning...
function shiftOriginTo(elem, l, t){
var o = getElementOrigin(elem)
var scale = getElementScale(elem)
var offset = getElementOffset(elem)
// calculate the offset change and compensate...
var cl = offset.left + ((o.left - o.left*scale) - (l - l*scale))
var ct = offset.top + ((o.top - o.top*scale) - (t - t*scale))
setElementOffset(elem, cl, ct)
return setElementOrigin(elem, l+'px', t+'px')
}
function setTransitionEasing(elem, ease){ function setTransitionEasing(elem, ease){
if(typeof(ms) == typeof(0)){ if(typeof(ms) == typeof(0)){

161
ui (gen4)/ribbons.js
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@ -256,28 +256,126 @@ module.RibbonsPrototype = {
// - use translate for placement of the .ribbon-set (prefered) // - use translate for placement of the .ribbon-set (prefered)
// - use an extra eleemnt for positioning and keep the // - use an extra eleemnt for positioning and keep the
// .ribbon-set at (0,0) // .ribbon-set at (0,0)
//
// XXX do we account vor viewer offset???
setScale: function(scale, t, l){ setScale: function(scale, t, l){
var ribbon_set = this.viewer.find('.ribbon-set') var ribbon_set = this.viewer.find('.ribbon-set')
var s = this.getScale() var img = t == null ? this.getImage() : t
if(t == null){ // XXX need to make this sync and not animate...
var img = this.getImage() this.setOrigin(img)
t = img.offset()
l = t.left + (img.width()/s)/2
t = t.top + (img.height()/s)/2
}
var ro = ribbon_set.offset()
var ot = t - ro.top
var ol = l - ro.left
setElementOrigin(ribbon_set, ol+'px', ot+'px')
setElementScale(ribbon_set, scale) setElementScale(ribbon_set, scale)
return this return this
}, },
getOrigin: function(){
return getElementOrigin(this.viewer.find('.ribbon-set'))
},
// Set ribbon set origin...
//
// Set origin to center of current image
// .setOrigin()
// -> ribbons
//
// Set origin to center of elment:
// .setOrigin(elem)
// -> ribbons
//
// Set origin to screen coordinates:
// .setOrigin(x, y)
// -> ribbons
//
// XXX this appears not to be scale-neutral -- it gets a different
// set of numbers in ribbons >0 after doing .centerRibbon(..)
// ...but before calling .centerRibbon(..) this does everything
// quite correctly...
//
// ...this mutual dependency between this and .centerRibbon(..)
// makes it really hards to find where exactly the problem is...
//
// XXX should this also update offset????
/*
setOrigin: function(a, b){
var s = this.getScale()
var ribbon_set = this.viewer.find('.ribbon-set')
if(typeof(a) == typeof(123) && typeof(b) == typeof(123)){
var t = a
var l = b
} else {
if(a == null){
var img = this.getImage()
} else {
var img = this.getImage(a)
}
var io = img.offset()
var vo = this.viewer.offset()
// get distance from center of image to top left corner of
// screen...
// NOTE: the result should be scale-neutral.
var l = (io.left - vo.left) + (img.width()*s)/2
var t = (io.top - vo.top) + (img.height()*s)/2
}
var rs = getElementOffset(ribbon_set)
var ot = t - rs.top
var ol = l - rs.left
var ro = this.getOrigin()
console.log('### origin:', ol, ot)
setElementOrigin(ribbon_set, ol+'px', ot+'px')
//setElementOffset(ribbon_set,
// rs.left + (ro.left - ro.left*s) - (l - l*s),
// rs.top + (ro.top - ro.top*s) - (t - t*s))
return this
},
*/
setOrigin: function(a, b){
var ribbon_set = this.viewer.find('.ribbon-set')
if(typeof(a) == typeof(123) && typeof(b) == typeof(123)){
var t = a
var l = b
} else {
if(a == null){
var img = this.getImage()
} else {
var img = this.getImage(a)
}
var s = this.getScale()
var io = img.offset()
var vo = this.viewer.offset()
// get distance from center of image to top left corner of
// screen...
// NOTE: the result should be scale-neutral.
var l = (io.left - vo.left) + (img.width()*s)/2
var t = (io.top - vo.top) + (img.height()*s)/2
}
var rs = getElementOffset(ribbon_set)
var ot = t - rs.top
var ol = l - rs.left
console.log('### origin:', ol, ot)
shiftOriginTo(ribbon_set, ol, ot)
return this
},
// XXX make this work for multiple targets... // XXX make this work for multiple targets...
// XXX avoid ardcoded delays... // XXX avoid ardcoded delays...
makeShadow: function(target, animate){ makeShadow: function(target, animate){
@ -1309,6 +1407,8 @@ module.RibbonsPrototype = {
// implicitly (i.e. the default) // implicitly (i.e. the default)
// NOTE: this will get absolute results relative to screen, view // NOTE: this will get absolute results relative to screen, view
// scaling will have no effect... // scaling will have no effect...
//
// XXX split this in two...(???)
_getOffset: function(target, vertical, horizontal, image_offset, scale){ _getOffset: function(target, vertical, horizontal, image_offset, scale){
vertical = vertical == null ? 'center' : vertical vertical = vertical == null ? 'center' : vertical
horizontal = horizontal == null ? 'center' : horizontal horizontal = horizontal == null ? 'center' : horizontal
@ -1333,8 +1433,12 @@ module.RibbonsPrototype = {
var rl = ribbon.offset().left var rl = ribbon.offset().left
var rst = ribbon_set.offset().top var rst = ribbon_set.offset().top
var W = viewer.width() // NOTE: not quite sure why need to multiply this by scale but
var H = viewer.height() // without it this does not work with origin/translate but
// does fine with top/left offsets...
var W = viewer.width() * scale
var H = viewer.height() * scale
var w = image.width() * scale var w = image.width() * scale
var h = image.height() * scale var h = image.height() * scale
@ -1368,15 +1472,25 @@ module.RibbonsPrototype = {
// center a ribbon vertically... // center a ribbon vertically...
// //
centerRibbon: function(target, offset, scale){ centerRibbon: function(target, offset, scale){
offset = offset == null scale = scale == null ? this.getScale() : scale
? this._getOffset(target, null, null, null, scale) // NOTE: when woring with origin we do not care about scale...
: offset //scale = scale == null ? 1 : scale
// vertical offset... offset = offset == null
this.viewer.find('.ribbon-set') // XXX this should not get affected by scale or origin...
.css({ // XXX this gives correct resolts ONLY when we got scaled when
top: offset.top, // focused on ribbon 0, in other cases it's messed up...
}) ? this._getOffset(target, null, null, null, 1).top
: offset.top
var ot = this.getOrigin().top
// XXX something is still missing here...
// ...it's getting closer when enlarging and blows up when scale -> 0
offset -= (ot/scale - ot)
console.log('### offset-top:', offset)
setElementOffset(this.viewer.find('.ribbon-set'), 0, offset)
return this return this
}, },
@ -1384,6 +1498,7 @@ module.RibbonsPrototype = {
// //
centerImage: function(target, mode, offset, scale){ centerImage: function(target, mode, offset, scale){
scale = scale == null ? this.getScale() : scale scale = scale == null ? this.getScale() : scale
offset = offset == null offset = offset == null
? this._getOffset(target, 'center', 'center', mode, scale) ? this._getOffset(target, 'center', 'center', mode, scale)
: offset : offset

4
ui (gen4)/ui.js
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@ -142,6 +142,10 @@ module.GLOBAL_KEYBOARD = {
'#3': function(){ a.fitThree() }, '#3': function(){ a.fitThree() },
'#4': function(){ a.fitFour() }, '#4': function(){ a.fitFour() },
'#5': function(){ a.fitFive() }, '#5': function(){ a.fitFive() },
'#6': function(){ a.fitSix() },
'#7': function(){ a.fitSeven() },
'#8': function(){ a.fitEight() },
'#9': function(){ a.fitNine() },
}, },