mirror of
https://github.com/openseadragon/openseadragon.git
synced 2024-11-23 05:36:09 +03:00
443 lines
15 KiB
JavaScript
443 lines
15 KiB
JavaScript
/* globals $, App */
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(function() {
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// ----------
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window.App = {
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// ----------
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init: function() {
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var self = this;
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var count = 70;
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this.mode = 'none';
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this.pageBuffer = 0.05;
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this.bigBuffer = 0.2;
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this.page = 0;
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this.modeNames = [
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'thumbs',
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'scroll',
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'book',
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'page'
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];
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this.viewer = OpenSeadragon({
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id: "contentDiv",
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prefixUrl: "../../../build/openseadragon/images/",
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autoResize: false,
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showHomeControl: false,
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// animationTime: 10,
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// springStiffness: 2,
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tileSources: this.tileSources.slice(0, count)
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});
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this.viewer.addHandler('open', function() {
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self.$el = $(self.viewer.element);
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self.setMode('thumbs');
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});
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this.viewer.addHandler('canvas-click', function(event) {
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if (self.mode !== 'thumbs' || !event.quick) {
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return;
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}
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var pos = self.viewer.viewport.pointFromPixel(event.position);
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var result = self.hitTest(pos);
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if (result) {
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self.setMode('page', result.index);
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}
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});
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this.viewer.addHandler('canvas-drag', function() {
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if (self.mode === 'thumbs') {
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return;
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}
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if (self.panBounds) {
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var center = self.viewer.viewport.getCenter();
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var currentCenter = self.viewer.viewport.getCenter(true);
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var viewBounds = self.viewer.viewport.getBounds();
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var bounds = self.panBounds.clone();
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var left = Math.min(currentCenter.x, bounds.x + (viewBounds.width / 2));
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var top = Math.min(currentCenter.y, bounds.y + (viewBounds.height / 2));
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var right = Math.max(currentCenter.x, (bounds.x + bounds.width) - (viewBounds.width / 2));
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var bottom = Math.max(currentCenter.y, (bounds.y + bounds.height) - (viewBounds.height / 2));
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var x;
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if (left <= right) {
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x = Math.max(left, Math.min(right, center.x));
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} else {
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x = bounds.x + (bounds.width / 2);
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}
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var y;
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if (top <= bottom) {
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y = Math.max(top, Math.min(bottom, center.y));
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} else {
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y = bounds.y + (bounds.height / 2);
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}
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if (x !== center.x || y !== center.y) {
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self.viewer.viewport.panTo(new OpenSeadragon.Point(x, y));
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}
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}
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if (self.mode === 'scroll') {
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var result = self.hitTest(self.viewer.viewport.getCenter());
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if (result) {
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self.page = result.index;
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}
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}
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});
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$.each(this.modeNames, function(i, v) {
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$('.' + v).click(function() {
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self.setMode(v);
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});
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});
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$('.next').click(function() {
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self.next();
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});
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$('.previous').click(function() {
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self.previous();
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});
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$(window).keyup(function(event) {
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if (self.mode === 'thumbs') {
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return;
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}
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if (event.which === 39) { // Right arrow
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self.next();
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} else if (event.which === 37) { // Left arrow
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self.previous();
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}
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});
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this.update();
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},
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// ----------
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next: function() {
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var page = this.page + (this.mode === 'book' ? 2 : 1);
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if (this.mode === 'book' && page % 2 === 0 && page !== 0) {
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page --;
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}
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this.goToPage(page);
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},
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// ----------
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previous: function() {
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var page = this.page - (this.mode === 'book' ? 2 : 1);
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if (this.mode === 'book' && page % 2 === 0 && page !== 0) {
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page --;
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}
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this.goToPage(page);
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},
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// ----------
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hitTest: function(pos) {
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var count = this.viewer.world.getItemCount();
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var item, box;
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for (var i = 0; i < count; i++) {
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item = this.viewer.world.getItemAt(i);
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box = item.getBounds();
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if (pos.x > box.x && pos.y > box.y && pos.x < box.x + box.width &&
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pos.y < box.y + box.height) {
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return {
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item: item,
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index: i
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};
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}
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}
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return null;
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},
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// ----------
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update: function() {
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var self = this;
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$('.nav').toggle(this.mode === 'scroll' || this.mode === 'book' || this.mode === 'page');
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$('.previous').toggleClass('hidden', this.page <= 0);
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$('.next').toggleClass('hidden', this.page >= this.viewer.world.getItemCount() - 1);
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$.each(this.modeNames, function(i, v) {
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$('.' + v).toggleClass('active', v === self.mode);
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});
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},
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// ----------
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setMode: function(mode, page) {
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var self = this;
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if (this.mode === mode) {
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if (page !== undefined) {
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this.goToPage(page);
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}
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return;
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}
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this.mode = mode;
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if (page !== undefined) {
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this.page = page; // Need to do this before layout
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}
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var layout = this.createLayout();
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var oldSize = new OpenSeadragon.Point(this.$el.width(), this.$el.height());
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var oldBounds = this.viewer.viewport.getBounds();
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var scrollTop = $(window).scrollTop();
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var scrollMax = $(document).height() - $(window).height();
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var scrollFactor = (scrollMax > 0 ? scrollTop / scrollMax : 0);
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if (this.mode === 'thumbs') {
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this.viewer.gestureSettingsMouse.scrollToZoom = false;
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this.viewer.zoomPerClick = 1;
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this.viewer.panHorizontal = false;
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this.viewer.panVertical = false;
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var viewerWidth = this.$el.width();
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var width = layout.bounds.width + (this.bigBuffer * 2);
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var height = layout.bounds.height + (this.bigBuffer * 2);
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var newHeight = viewerWidth * (height / width);
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this.$el
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.addClass('thumbs')
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.removeClass('full')
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.css({
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height: newHeight
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});
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} else {
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this.viewer.gestureSettingsMouse.scrollToZoom = true;
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this.viewer.zoomPerClick = 2;
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this.viewer.panHorizontal = true;
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this.viewer.panVertical = true;
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this.$el
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.addClass('full')
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.removeClass('thumbs')
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.css({
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height: 'auto'
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});
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}
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var newSize = new OpenSeadragon.Point(this.$el.width(), this.$el.height());
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if (oldSize.x !== newSize.x || oldSize.y !== newSize.y) {
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this.viewer.viewport.resize(newSize, false);
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var newBounds = this.viewer.viewport.getBounds();
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var box = oldBounds.clone();
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box.height = box.width * (newBounds.height / newBounds.width);
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var boxMax = oldBounds.height - box.height;
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box.y += boxMax * scrollFactor;
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this.viewer.viewport.fitBounds(box, true);
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this.viewer.viewport.update();
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}
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this.setLayout(layout);
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if (page !== undefined) {
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this.goToPage(page); // Need to do this after layout; does the zoom/pan
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} else {
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this.goHome();
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}
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this.viewer.viewport.minZoomLevel = this.viewer.viewport.getZoom();
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this.update();
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},
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// ----------
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goToPage: function(page) {
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var itemCount = this.viewer.world.getItemCount();
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page = Math.max(0, Math.min(itemCount - 1, page));
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this.page = page;
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var viewerWidth = this.$el.width();
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var viewerHeight = this.$el.height();
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var bounds = this.viewer.world.getItemAt(this.page).getBounds();
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var x = bounds.x;
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var y = bounds.y;
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var width = bounds.width;
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var height = bounds.height;
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var box;
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if (this.mode === 'book') {
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var item;
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if (this.page % 2) { // First in a pair
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item = this.viewer.world.getItemAt(this.page + 1);
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if (item) {
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width += item.getBounds().width;
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}
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} else {
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item = this.viewer.world.getItemAt(this.page - 1);
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if (item) {
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box = item.getBounds();
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x -= width;
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width += box.width;
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}
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}
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}
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x -= this.pageBuffer;
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y -= this.pageBuffer;
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width += (this.pageBuffer * 2);
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height += (this.pageBuffer * 2);
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if (this.mode === 'scroll') {
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if (this.page === 0) {
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x = bounds.x - this.pageBuffer;
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width = height * (viewerWidth / viewerHeight);
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} else if (this.page === this.viewer.world.getItemCount() - 1) {
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width = height * (viewerWidth / viewerHeight);
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x = (bounds.x + bounds.width + this.pageBuffer) - width;
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}
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}
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box = new OpenSeadragon.Rect(x, y, width, height);
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this.viewer.viewport.fitBounds(box);
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if (this.mode === 'page' || this.mode === 'book') {
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this.panBounds = box;
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} else if (this.mode === 'scroll') {
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this.panBounds = this.viewer.world.getItemAt(0).getBounds()
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.union(this.viewer.world.getItemAt(itemCount - 1).getBounds());
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this.panBounds.x -= this.pageBuffer;
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this.panBounds.y -= this.pageBuffer;
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this.panBounds.width += (this.pageBuffer * 2);
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this.panBounds.height += (this.pageBuffer * 2);
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}
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this.viewer.viewport.minZoomLevel = this.viewer.viewport.getZoom();
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this.update();
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},
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// ----------
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createLayout: function() {
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var viewerWidth = this.$el.width();
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var viewerHeight = this.$el.height();
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var layoutConfig = {};
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if (this.mode === 'thumbs') {
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layoutConfig.columns = Math.floor(viewerWidth / 150);
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layoutConfig.buffer = this.bigBuffer;
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layoutConfig.sameWidth = true;
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} else if (this.mode === 'scroll') {
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layoutConfig.buffer = this.pageBuffer;
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} else if (this.mode === 'book' || this.mode === 'page') {
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layoutConfig.book = (this.mode === 'book');
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var height = 1 + (this.pageBuffer * 2);
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// Note that using window here is approximate, but that's close enough.
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// We can't use viewer, because it may be stretched for the thumbs view.
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layoutConfig.buffer = (height * ($(window).width() / $(window).height())) / 2;
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}
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var layout = {
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bounds: null,
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specs: []
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};
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var count = this.viewer.world.getItemCount();
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var x = 0;
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var y = 0;
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var offset = new OpenSeadragon.Point();
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var rowHeight = 0;
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var item, box;
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for (var i = 0; i < count; i++) {
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item = this.viewer.world.getItemAt(i);
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box = item.getBounds();
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if (i === this.page) {
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offset = box.getTopLeft().minus(new OpenSeadragon.Point(x, y));
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}
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box.x = x;
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box.y = y;
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if (layoutConfig.sameWidth) {
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box.height = box.height / box.width;
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box.width = 1;
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} else {
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box.width = box.width / box.height;
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box.height = 1;
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}
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rowHeight = Math.max(rowHeight, box.height);
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layout.specs.push({
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item: item,
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bounds: box
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});
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if (layoutConfig.columns && i % layoutConfig.columns === layoutConfig.columns - 1) {
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x = 0;
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y += rowHeight + layoutConfig.buffer;
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rowHeight = 0;
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} else {
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if (!layoutConfig.book || i % 2 === 0) {
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x += layoutConfig.buffer;
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}
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x += box.width;
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}
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}
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var pos, spec;
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for (i = 0; i < count; i++) {
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spec = layout.specs[i];
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pos = spec.bounds.getTopLeft().plus(offset);
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spec.bounds.x = pos.x;
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spec.bounds.y = pos.y;
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if (layout.bounds) {
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layout.bounds = layout.bounds.union(spec.bounds);
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} else {
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layout.bounds = spec.bounds.clone();
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}
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}
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return layout;
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},
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// ----------
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setLayout: function(layout) {
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var spec;
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for (var i = 0; i < layout.specs.length; i++) {
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spec = layout.specs[i];
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spec.item.setPosition(spec.bounds.getTopLeft());
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spec.item.setWidth(spec.bounds.width);
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}
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},
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// ----------
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goHome: function() {
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var viewerWidth = this.$el.width();
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var viewerHeight = this.$el.height();
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var layoutConfig = {};
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var box;
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if (this.mode === 'thumbs') {
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box = this.viewer.world.getHomeBounds();
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box.x -= this.bigBuffer;
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box.y -= this.bigBuffer;
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box.width += (this.bigBuffer * 2);
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box.height = box.width * (viewerHeight / viewerWidth);
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this.viewer.viewport.fitBounds(box);
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} else {
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this.goToPage(this.page);
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}
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}
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};
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// ----------
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$(document).ready(function() {
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App.init();
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});
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})();
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