/* * OpenSeadragon - ReferenceStrip * * Copyright (C) 2009 CodePlex Foundation * Copyright (C) 2010-2013 OpenSeadragon contributors * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of CodePlex Foundation nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ (function ( $ ) { // dictionary from id to private properties var THIS = {}; /** * The CollectionDrawer is a reimplementation if the Drawer API that * focuses on allowing a viewport to be redefined as a collection * of smaller viewports, defined by a clear number of rows and / or * columns of which each item in the matrix of viewports has its own * source. * * This idea is a reexpression of the idea of dzi collections * which allows a clearer algorithm to reuse the tile sources already * supported by OpenSeadragon, in heterogenious or homogenious * sequences just like mixed groups already supported by the viewer * for the purpose of image sequnces. * * TODO: The difficult part of this feature is figuring out how to express * this functionality as a combination of the functionality already * provided by Drawer, Viewport, TileSource, and Navigator. It may * require better abstraction at those points in order to effeciently * reuse those paradigms. */ /** * @class ReferenceStrip * @memberof OpenSeadragon * @param {Object} options */ $.ReferenceStrip = function ( options ) { var _this = this, viewer = options.viewer, viewerSize = $.getElementSize( viewer.element ), element, style, i; //We may need to create a new element and id if they did not //provide the id for the existing element if ( !options.id ) { options.id = 'referencestrip-' + $.now(); this.element = $.makeNeutralElement( "div" ); this.element.id = options.id; this.element.className = 'referencestrip'; } options = $.extend( true, { sizeRatio: $.DEFAULT_SETTINGS.referenceStripSizeRatio, position: $.DEFAULT_SETTINGS.referenceStripPosition, scroll: $.DEFAULT_SETTINGS.referenceStripScroll, clickTimeThreshold: $.DEFAULT_SETTINGS.clickTimeThreshold }, options, { //required overrides element: this.element, //These need to be overridden to prevent recursion since //the navigator is a viewer and a viewer has a navigator showNavigator: false, mouseNavEnabled: false, showNavigationControl: false, showSequenceControl: false } ); $.extend( this, options ); //Private state properties THIS[this.id] = { "animating": false }; this.minPixelRatio = this.viewer.minPixelRatio; style = this.element.style; style.marginTop = '0px'; style.marginRight = '0px'; style.marginBottom = '0px'; style.marginLeft = '0px'; style.left = '0px'; style.bottom = '0px'; style.border = '0px'; style.background = '#000'; style.position = 'relative'; $.setElementTouchActionNone( this.element ); $.setElementOpacity( this.element, 0.8 ); this.viewer = viewer; this.innerTracker = new $.MouseTracker( { element: this.element, dragHandler: $.delegate( this, onStripDrag ), scrollHandler: $.delegate( this, onStripScroll ), enterHandler: $.delegate( this, onStripEnter ), exitHandler: $.delegate( this, onStripExit ), keyDownHandler: $.delegate( this, onKeyDown ), keyHandler: $.delegate( this, onKeyPress ) } ); //Controls the position and orientation of the reference strip and sets the //appropriate width and height if ( options.width && options.height ) { this.element.style.width = options.width + 'px'; this.element.style.height = options.height + 'px'; viewer.addControl( this.element, { anchor: $.ControlAnchor.BOTTOM_LEFT } ); } else { if ( "horizontal" == options.scroll ) { this.element.style.width = ( viewerSize.x * options.sizeRatio * viewer.tileSources.length ) + ( 12 * viewer.tileSources.length ) + 'px'; this.element.style.height = ( viewerSize.y * options.sizeRatio ) + 'px'; viewer.addControl( this.element, { anchor: $.ControlAnchor.BOTTOM_LEFT } ); } else { this.element.style.height = ( viewerSize.y * options.sizeRatio * viewer.tileSources.length ) + ( 12 * viewer.tileSources.length ) + 'px'; this.element.style.width = ( viewerSize.x * options.sizeRatio ) + 'px'; viewer.addControl( this.element, { anchor: $.ControlAnchor.TOP_LEFT } ); } } this.panelWidth = ( viewerSize.x * this.sizeRatio ) + 8; this.panelHeight = ( viewerSize.y * this.sizeRatio ) + 8; this.panels = []; this.miniViewers = {}; /*jshint loopfunc:true*/ for ( i = 0; i < viewer.tileSources.length; i++ ) { element = $.makeNeutralElement( 'div' ); element.id = this.element.id + "-" + i; element.style.width = _this.panelWidth + 'px'; element.style.height = _this.panelHeight + 'px'; element.style.display = 'inline'; element.style.float = 'left'; //Webkit element.style.cssFloat = 'left'; //Firefox element.style.styleFloat = 'left'; //IE element.style.padding = '2px'; $.setElementTouchActionNone( element ); element.innerTracker = new $.MouseTracker( { element: element, clickTimeThreshold: this.clickTimeThreshold, clickDistThreshold: this.clickDistThreshold, pressHandler: function ( event ) { event.eventSource.dragging = $.now(); }, releaseHandler: function ( event ) { var tracker = event.eventSource, id = tracker.element.id, page = Number( id.split( '-' )[2] ), now = $.now(); if ( event.insideElementPressed && event.insideElementReleased && tracker.dragging && ( now - tracker.dragging ) < tracker.clickTimeThreshold ) { tracker.dragging = null; viewer.goToPage( page ); } } } ); this.element.appendChild( element ); element.activePanel = false; this.panels.push( element ); } loadPanels( this, this.scroll == 'vertical' ? viewerSize.y : viewerSize.x, 0 ); this.setFocus( 0 ); }; $.extend( $.ReferenceStrip.prototype, $.EventSource.prototype, $.Viewer.prototype, /** @lends OpenSeadragon.ReferenceStrip.prototype */{ /** * @function */ setFocus: function ( page ) { var element = $.getElement( this.element.id + '-' + page ), viewerSize = $.getElementSize( this.viewer.canvas ), scrollWidth = Number( this.element.style.width.replace( 'px', '' ) ), scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ), offsetLeft = -Number( this.element.style.marginLeft.replace( 'px', '' ) ), offsetTop = -Number( this.element.style.marginTop.replace( 'px', '' ) ), offset; if ( this.currentSelected !== element ) { if ( this.currentSelected ) { this.currentSelected.style.background = '#000'; } this.currentSelected = element; this.currentSelected.style.background = '#999'; if ( 'horizontal' == this.scroll ) { //right left offset = ( Number( page ) ) * ( this.panelWidth + 3 ); if ( offset > offsetLeft + viewerSize.x - this.panelWidth ) { offset = Math.min( offset, ( scrollWidth - viewerSize.x ) ); this.element.style.marginLeft = -offset + 'px'; loadPanels( this, viewerSize.x, -offset ); } else if ( offset < offsetLeft ) { offset = Math.max( 0, offset - viewerSize.x / 2 ); this.element.style.marginLeft = -offset + 'px'; loadPanels( this, viewerSize.x, -offset ); } } else { offset = ( Number( page ) ) * ( this.panelHeight + 3 ); if ( offset > offsetTop + viewerSize.y - this.panelHeight ) { offset = Math.min( offset, ( scrollHeight - viewerSize.y ) ); this.element.style.marginTop = -offset + 'px'; loadPanels( this, viewerSize.y, -offset ); } else if ( offset < offsetTop ) { offset = Math.max( 0, offset - viewerSize.y / 2 ); this.element.style.marginTop = -offset + 'px'; loadPanels( this, viewerSize.y, -offset ); } } this.currentPage = page; onStripEnter.call( this, { eventSource: this.innerTracker } ); } }, /** * @function */ update: function () { if ( THIS[this.id].animating ) { $.console.log( 'image reference strip update' ); return true; } return false; }, // Overrides Viewer.destroy destroy: function() { if (this.miniViewers) { for (var key in this.miniViewers) { this.miniViewers[key].destroy(); } } if (this.element) { this.element.parentNode.removeChild(this.element); } } } ); /** * @private * @inner * @function */ function onStripDrag( event ) { var offsetLeft = Number( this.element.style.marginLeft.replace( 'px', '' ) ), offsetTop = Number( this.element.style.marginTop.replace( 'px', '' ) ), scrollWidth = Number( this.element.style.width.replace( 'px', '' ) ), scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ), viewerSize = $.getElementSize( this.viewer.canvas ); this.dragging = true; if ( this.element ) { if ( 'horizontal' == this.scroll ) { if ( -event.delta.x > 0 ) { //forward if ( offsetLeft > -( scrollWidth - viewerSize.x ) ) { this.element.style.marginLeft = ( offsetLeft + ( event.delta.x * 2 ) ) + 'px'; loadPanels( this, viewerSize.x, offsetLeft + ( event.delta.x * 2 ) ); } } else if ( -event.delta.x < 0 ) { //reverse if ( offsetLeft < 0 ) { this.element.style.marginLeft = ( offsetLeft + ( event.delta.x * 2 ) ) + 'px'; loadPanels( this, viewerSize.x, offsetLeft + ( event.delta.x * 2 ) ); } } } else { if ( -event.delta.y > 0 ) { //forward if ( offsetTop > -( scrollHeight - viewerSize.y ) ) { this.element.style.marginTop = ( offsetTop + ( event.delta.y * 2 ) ) + 'px'; loadPanels( this, viewerSize.y, offsetTop + ( event.delta.y * 2 ) ); } } else if ( -event.delta.y < 0 ) { //reverse if ( offsetTop < 0 ) { this.element.style.marginTop = ( offsetTop + ( event.delta.y * 2 ) ) + 'px'; loadPanels( this, viewerSize.y, offsetTop + ( event.delta.y * 2 ) ); } } } } return false; } /** * @private * @inner * @function */ function onStripScroll( event ) { var offsetLeft = Number( this.element.style.marginLeft.replace( 'px', '' ) ), offsetTop = Number( this.element.style.marginTop.replace( 'px', '' ) ), scrollWidth = Number( this.element.style.width.replace( 'px', '' ) ), scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ), viewerSize = $.getElementSize( this.viewer.canvas ); if ( this.element ) { if ( 'horizontal' == this.scroll ) { if ( event.scroll > 0 ) { //forward if ( offsetLeft > -( scrollWidth - viewerSize.x ) ) { this.element.style.marginLeft = ( offsetLeft - ( event.scroll * 60 ) ) + 'px'; loadPanels( this, viewerSize.x, offsetLeft - ( event.scroll * 60 ) ); } } else if ( event.scroll < 0 ) { //reverse if ( offsetLeft < 0 ) { this.element.style.marginLeft = ( offsetLeft - ( event.scroll * 60 ) ) + 'px'; loadPanels( this, viewerSize.x, offsetLeft - ( event.scroll * 60 ) ); } } } else { if ( event.scroll < 0 ) { //scroll up if ( offsetTop > viewerSize.y - scrollHeight ) { this.element.style.marginTop = ( offsetTop + ( event.scroll * 60 ) ) + 'px'; loadPanels( this, viewerSize.y, offsetTop + ( event.scroll * 60 ) ); } } else if ( event.scroll > 0 ) { //scroll dowm if ( offsetTop < 0 ) { this.element.style.marginTop = ( offsetTop + ( event.scroll * 60 ) ) + 'px'; loadPanels( this, viewerSize.y, offsetTop + ( event.scroll * 60 ) ); } } } } //cancels event return false; } function loadPanels( strip, viewerSize, scroll ) { var panelSize, activePanelsStart, activePanelsEnd, miniViewer, style, i, element; if ( 'horizontal' == strip.scroll ) { panelSize = strip.panelWidth; } else { panelSize = strip.panelHeight; } activePanelsStart = Math.ceil( viewerSize / panelSize ) + 5; activePanelsEnd = Math.ceil( ( Math.abs( scroll ) + viewerSize ) / panelSize ) + 1; activePanelsStart = activePanelsEnd - activePanelsStart; activePanelsStart = activePanelsStart < 0 ? 0 : activePanelsStart; for ( i = activePanelsStart; i < activePanelsEnd && i < strip.panels.length; i++ ) { element = strip.panels[i]; if ( !element.activePanel ) { miniViewer = new $.Viewer( { id: element.id, tileSources: [strip.viewer.tileSources[i]], element: element, navigatorSizeRatio: strip.sizeRatio, showNavigator: false, mouseNavEnabled: false, showNavigationControl: false, showSequenceControl: false, immediateRender: true, blendTime: 0, animationTime: 0 } ); miniViewer.displayRegion = $.makeNeutralElement( "div" ); miniViewer.displayRegion.id = element.id + '-displayregion'; miniViewer.displayRegion.className = 'displayregion'; style = miniViewer.displayRegion.style; style.position = 'relative'; style.top = '0px'; style.left = '0px'; style.fontSize = '0px'; style.overflow = 'hidden'; style.float = 'left'; //Webkit style.cssFloat = 'left'; //Firefox style.styleFloat = 'left'; //IE style.zIndex = 999999999; style.cursor = 'default'; style.width = ( strip.panelWidth - 4 ) + 'px'; style.height = ( strip.panelHeight - 4 ) + 'px'; // TODO: What is this for? Future keyboard navigation support? miniViewer.displayRegion.innerTracker = new $.MouseTracker( { element: miniViewer.displayRegion, startDisabled: true } ); element.getElementsByTagName( 'div' )[0].appendChild( miniViewer.displayRegion ); strip.miniViewers[element.id] = miniViewer; element.activePanel = true; } } } /** * @private * @inner * @function */ function onStripEnter( event ) { var element = event.eventSource.element; //$.setElementOpacity(element, 0.8); //element.style.border = '1px solid #555'; //element.style.background = '#000'; if ( 'horizontal' == this.scroll ) { //element.style.paddingTop = "0px"; element.style.marginBottom = "0px"; } else { //element.style.paddingRight = "0px"; element.style.marginLeft = "0px"; } return false; } /** * @private * @inner * @function */ function onStripExit( event ) { var element = event.eventSource.element; if ( 'horizontal' == this.scroll ) { //element.style.paddingTop = "10px"; element.style.marginBottom = "-" + ( $.getElementSize( element ).y / 2 ) + "px"; } else { //element.style.paddingRight = "10px"; element.style.marginLeft = "-" + ( $.getElementSize( element ).x / 2 ) + "px"; } return false; } /** * @private * @inner * @function */ function onKeyDown( event ) { //console.log( event.keyCode ); if ( !event.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) { switch ( event.keyCode ) { case 38: //up arrow onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } ); return false; case 40: //down arrow onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } ); return false; case 37: //left arrow onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } ); return false; case 39: //right arrow onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } ); return false; default: //console.log( 'navigator keycode %s', event.keyCode ); return true; } } else { return true; } } /** * @private * @inner * @function */ function onKeyPress( event ) { //console.log( event.keyCode ); if ( !event.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) { switch ( event.keyCode ) { case 61: //=|+ onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } ); return false; case 45: //-|_ onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } ); return false; case 48: //0|) case 119: //w case 87: //W onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } ); return false; case 115: //s case 83: //S onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } ); return false; case 97: //a onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } ); return false; case 100: //d onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } ); return false; default: //console.log( 'navigator keycode %s', event.keyCode ); return true; } } else { return true; } } }(OpenSeadragon));