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Diffstat (limited to 'cropper/lib/slider.js')
| -rw-r--r-- | cropper/lib/slider.js | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/cropper/lib/slider.js b/cropper/lib/slider.js new file mode 100644 index 000000000..c0f1fc01b --- /dev/null +++ b/cropper/lib/slider.js @@ -0,0 +1,283 @@ +// Copyright (c) 2005 Marty Haught, Thomas Fuchs +// +// See http://script.aculo.us for more info +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be +// included in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +if(!Control) var Control = {}; +Control.Slider = Class.create(); + +// options: +// axis: 'vertical', or 'horizontal' (default) +// +// callbacks: +// onChange(value) +// onSlide(value) +Control.Slider.prototype = { + initialize: function(handle, track, options) { + var slider = this; + + if(handle instanceof Array) { + this.handles = handle.collect( function(e) { return $(e) }); + } else { + this.handles = [$(handle)]; + } + + this.track = $(track); + this.options = options || {}; + + this.axis = this.options.axis || 'horizontal'; + this.increment = this.options.increment || 1; + this.step = parseInt(this.options.step || '1'); + this.range = this.options.range || $R(0,1); + + this.value = 0; // assure backwards compat + this.values = this.handles.map( function() { return 0 }); + this.spans = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false; + this.options.startSpan = $(this.options.startSpan || null); + this.options.endSpan = $(this.options.endSpan || null); + + this.restricted = this.options.restricted || false; + + this.maximum = this.options.maximum || this.range.end; + this.minimum = this.options.minimum || this.range.start; + + // Will be used to align the handle onto the track, if necessary + this.alignX = parseInt(this.options.alignX || '0'); + this.alignY = parseInt(this.options.alignY || '0'); + + this.trackLength = this.maximumOffset() - this.minimumOffset(); + this.handleLength = this.isVertical() ? this.handles[0].offsetHeight : this.handles[0].offsetWidth; + + this.active = false; + this.dragging = false; + this.disabled = false; + + if(this.options.disabled) this.setDisabled(); + + // Allowed values array + this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false; + if(this.allowedValues) { + this.minimum = this.allowedValues.min(); + this.maximum = this.allowedValues.max(); + } + + this.eventMouseDown = this.startDrag.bindAsEventListener(this); + this.eventMouseUp = this.endDrag.bindAsEventListener(this); + this.eventMouseMove = this.update.bindAsEventListener(this); + + // Initialize handles in reverse (make sure first handle is active) + this.handles.each( function(h,i) { + i = slider.handles.length-1-i; + slider.setValue(parseFloat( + (slider.options.sliderValue instanceof Array ? + slider.options.sliderValue[i] : slider.options.sliderValue) || + slider.range.start), i); + Element.makePositioned(h); // fix IE + Event.observe(h, "mousedown", slider.eventMouseDown); + }); + + Event.observe(this.track, "mousedown", this.eventMouseDown); + Event.observe(document, "mouseup", this.eventMouseUp); + Event.observe(document, "mousemove", this.eventMouseMove); + + this.initialized = true; + }, + dispose: function() { + var slider = this; + Event.stopObserving(this.track, "mousedown", this.eventMouseDown); + Event.stopObserving(document, "mouseup", this.eventMouseUp); + Event.stopObserving(document, "mousemove", this.eventMouseMove); + this.handles.each( function(h) { + Event.stopObserving(h, "mousedown", slider.eventMouseDown); + }); + }, + setDisabled: function(){ + this.disabled = true; + }, + setEnabled: function(){ + this.disabled = false; + }, + getNearestValue: function(value){ + if(this.allowedValues){ + if(value >= this.allowedValues.max()) return(this.allowedValues.max()); + if(value <= this.allowedValues.min()) return(this.allowedValues.min()); + + var offset = Math.abs(this.allowedValues[0] - value); + var newValue = this.allowedValues[0]; + this.allowedValues.each( function(v) { + var currentOffset = Math.abs(v - value); + if(currentOffset <= offset){ + newValue = v; + offset = currentOffset; + } + }); + return newValue; + } + if(value > this.range.end) return this.range.end; + if(value < this.range.start) return this.range.start; + return value; + }, + setValue: function(sliderValue, handleIdx){ + if(!this.active) { + this.activeHandle = this.handles[handleIdx]; + this.activeHandleIdx = handleIdx; + this.updateStyles(); + } + handleIdx = handleIdx || this.activeHandleIdx || 0; + if(this.initialized && this.restricted) { + if((handleIdx>0) && (sliderValue<this.values[handleIdx-1])) + sliderValue = this.values[handleIdx-1]; + if((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1])) + sliderValue = this.values[handleIdx+1]; + } + sliderValue = this.getNearestValue(sliderValue); + this.values[handleIdx] = sliderValue; + this.value = this.values[0]; // assure backwards compat + + this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] = + this.translateToPx(sliderValue); + + this.drawSpans(); + if(!this.dragging || !this.event) this.updateFinished(); + }, + setValueBy: function(delta, handleIdx) { + this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta, + handleIdx || this.activeHandleIdx || 0); + }, + translateToPx: function(value) { + return Math.round( + ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) * + (value - this.range.start)) + "px"; + }, + translateToValue: function(offset) { + return ((offset/(this.trackLength-this.handleLength) * + (this.range.end-this.range.start)) + this.range.start); + }, + getRange: function(range) { + var v = this.values.sortBy(Prototype.K); + range = range || 0; + return $R(v[range],v[range+1]); + }, + minimumOffset: function(){ + return(this.isVertical() ? this.alignY : this.alignX); + }, + maximumOffset: function(){ + return(this.isVertical() ? + this.track.offsetHeight - this.alignY : this.track.offsetWidth - this.alignX); + }, + isVertical: function(){ + return (this.axis == 'vertical'); + }, + drawSpans: function() { + var slider = this; + if(this.spans) + $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) }); + if(this.options.startSpan) + this.setSpan(this.options.startSpan, + $R(0, this.values.length>1 ? this.getRange(0).min() : this.value )); + if(this.options.endSpan) + this.setSpan(this.options.endSpan, + $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum)); + }, + setSpan: function(span, range) { + if(this.isVertical()) { + span.style.top = this.translateToPx(range.start); + span.style.height = this.translateToPx(range.end - range.start + this.range.start); + } else { + span.style.left = this.translateToPx(range.start); + span.style.width = this.translateToPx(range.end - range.start + this.range.start); + } + }, + updateStyles: function() { + this.handles.each( function(h){ Element.removeClassName(h, 'selected') }); + Element.addClassName(this.activeHandle, 'selected'); + }, + startDrag: function(event) { + if(Event.isLeftClick(event)) { + if(!this.disabled){ + this.active = true; + + var handle = Event.element(event); + var pointer = [Event.pointerX(event), Event.pointerY(event)]; + if(handle==this.track) { + var offsets = Position.cumulativeOffset(this.track); + this.event = event; + this.setValue(this.translateToValue( + (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2) + )); + var offsets = Position.cumulativeOffset(this.activeHandle); + this.offsetX = (pointer[0] - offsets[0]); + this.offsetY = (pointer[1] - offsets[1]); + } else { + // find the handle (prevents issues with Safari) + while((this.handles.indexOf(handle) == -1) && handle.parentNode) + handle = handle.parentNode; + + this.activeHandle = handle; + this.activeHandleIdx = this.handles.indexOf(this.activeHandle); + this.updateStyles(); + + var offsets = Position.cumulativeOffset(this.activeHandle); + this.offsetX = (pointer[0] - offsets[0]); + this.offsetY = (pointer[1] - offsets[1]); + } + } + Event.stop(event); + } + }, + update: function(event) { + if(this.active) { + if(!this.dragging) this.dragging = true; + this.draw(event); + // fix AppleWebKit rendering + if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0); + Event.stop(event); + } + }, + draw: function(event) { + var pointer = [Event.pointerX(event), Event.pointerY(event)]; + var offsets = Position.cumulativeOffset(this.track); + pointer[0] -= this.offsetX + offsets[0]; + pointer[1] -= this.offsetY + offsets[1]; + this.event = event; + this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] )); + if(this.initialized && this.options.onSlide) + this.options.onSlide(this.values.length>1 ? this.values : this.value, this); + }, + endDrag: function(event) { + if(this.active && this.dragging) { + this.finishDrag(event, true); + Event.stop(event); + } + this.active = false; + this.dragging = false; + }, + finishDrag: function(event, success) { + this.active = false; + this.dragging = false; + this.updateFinished(); + }, + updateFinished: function() { + if(this.initialized && this.options.onChange) + this.options.onChange(this.values.length>1 ? this.values : this.value, this); + this.event = null; + } +}
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