- $.widget('wl.pictureviewer', {
-
- options: {
- steps: 6, // steps of zoom
- max: 300, // max zoom in percent
- plus_button: undefined,
- minus_button: undefined
- },
-
- _create: function() {
- var self = this;
- self._zoom = 0;
- self.initial_size = [
- self.element.width(),
- self.element.height()
- ];
- self.initial_position = self.element.offset();
-
- self.element.css({
- 'margin': 0,
- 'position': 'absolute',
- });
- self.element.offset(self.initial_position);
-
- if (self.options.plus_button)
- self.options.plus_button.click(
- function(ev) { self.zoom(1); });
- if (self.options.minus_button)
- self.options.minus_button.click(
- function(ev) { self.zoom(-1); });
-
- function contain(event, ui) {
- var fix = self.allowedPosition(ui.position);
- console.log("fix: ", fix);
- if (fix !== undefined) {
- return false;
- };
- };
- self.element.draggable({drag: contain});
-
- return self;
- },
-
- zoom: function(steps) {
- var t = this._zoom + steps;
- return this.zoomTo(t);
- },
-
- zoomForStep: function(step) {
- // 0 => initial
- // max_step-1 => max %
- return 100 + (this.options.max - 100) / this.options.steps * step
- },
-
- zoomTo: function(level) {
- if (level < 0 || level > this.options.steps)
- return;
- var ratio = this.zoomForStep(level) / 100;
- var new_width = ratio * this.initial_size[0];
- var new_height = ratio * this.initial_size[1];
- var target = {
- 'width': new_width,
- 'left': this.initial_position.left - (new_width - this.initial_size[0])/2,
- 'top': this.initial_position.top - (new_height - this.initial_size[1])/2,
- };
- this._zoom = level;
- this.element.animate(target, 200); // default duration=400
- },
-
- allowedPosition: function(off) {
- var x = undefined, fix_x = undefined;
- var y = undefined, fix_y = undefined;
- var w = this.element.width();
- var h = this.element.height();
- var cw = $(window).width();
- var ch = $(window).height();
- var off = off || this.element.offset();
-
- if (w <= cw) {
- var x = off.left;
- if (x < 0)
- fix_x = 0;
- if (x + w > cw)
- fix_x = cw - w;
- } else {
- if (x > 0)
- fix_x = 0;
- if (x + w < cw)
- fix_x = cw - w;
- }
-
- if (h <= ch) {
- var y = off.top;
- if (y < 0)
- fix_y = 0;
- if (y + h > ch)
- fix_y = ch - h;
- } else {
- if (y > 0)
- fix_y = 0;
- if (y + h < ch)
- fix_y = ch - h;
- }
- if (fix_x !== undefined || fix_y !== undefined)
- return { top: fix_y, left: fix_x };
- return undefined;
-
- },
- });
+ $.widget('wl.pictureviewer', {
+
+ options: {
+ steps: 6, // steps of zoom
+ max: -1, // max zoom in percent
+ plus_button: undefined,
+ minus_button: undefined,
+ height: 500, // height to scale to initially
+ },
+
+
+ _create: function() {
+ var self = this;
+ /* Calibrate */
+ self._zoom = 0;
+
+ // the initial thumbnailed picture
+
+
+ var img = self.element.find('img.initial').get(0);
+
+ self.initial_size = [
+ img.naturalWidth,
+ img.naturalHeight
+ ];
+
+ self.element.width(self.initial_size[0]);
+ self.element.height(self.initial_size[1]);
+
+ self.initial_position = self.element.offset();
+
+ var original = self.element.find('img.original').get(0);
+ self._original = false;
+ self.original_loeaded = undefined; // callback
+ self._original_loaded = false;
+
+ self.spinner = $("#spinner").progressSpin();
+
+ $(original).load(function() {
+ console.log("loaded original");
+ self._original_loaded = true;
+ self.spinner.stop();
+ var cb = self.original_loaded;
+ self.original_loaded = undefined;
+ if (cb)
+ cb()
+ });
+
+ if (self.options.max <= 0) {
+ self.options.max = original.naturalWidth
+ * 100 / self.initial_size[0];
+ }
+
+ self.element.css({
+ 'margin': 0,
+ });
+
+ self.element.offset(self.initial_position);
+ // self.element.draggable({containment:"parent"});
+
+ if (self.options.plus_button)
+ self.options.plus_button.click(
+ function(ev) { self.zoom(1); });
+ if (self.options.minus_button)
+ self.options.minus_button.click(
+ function(ev) { self.zoom(-1); });
+
+ self.options.areas_links.hover(function() {
+ $this = $(this);
+ var coords = $this.data("coords");
+ this._picture_mark = self.createMark({
+ label: $this.text(),
+ coords: coords,
+ });
+ }, function() {
+ $(this._picture_mark).remove();
+ this._picture_mark = undefined;
+ });
+ return self;
+ },
+
+ natural_size: function() {
+ var img = this.element.find('img.original').get(0);
+ return [ img.naturalWidth, img.naturalHeight ]
+ },
+
+ currentZoom: function() { return this._zoom; },
+
+ initOriginal: function() {
+ var self = this;
+ function subst_original() {
+ self.element.find("img.initial").remove();
+ self.element.find("img.loading").removeClass("loading");
+ self._original = true;
+ }
+ if (!this._original) {
+ if (this._original_loaded) {
+ return subst_original();
+ } else {
+ self.original_loaded = subst_original;
+ self.spinner.start();
+ }
+ }
+
+ },
+
+ zoom: function(steps) {
+ this.initOriginal();
+ var t = this._zoom + steps;
+ return this.zoomTo(t);
+ },
+
+ zoomForStep: function(step) {
+ // 0 => initial
+ // max_step-1 => max %
+ return 100 + (this.options.max - 100) / this.options.steps * step
+ },
+
+ zoomTo: function(level) {
+ if (level < 0 || level > this.options.steps)
+ return;
+ var ratio = this.zoomForStep(level) / 100;
+ var new_width = ratio * this.initial_size[0];
+ var new_height = ratio * this.initial_size[1];
+ var target = {
+ 'width': new_width,
+ 'left': Math.max(0,
+ this.initial_position.left
+ - (new_width - this.initial_size[0])/2),
+ 'top': Math.max(0,
+ this.initial_position.top
+ - (new_height - this.initial_size[1])/2),
+ };
+
+ this._zoom = level;
+
+ this.element.css(target);
+
+
+// this.element.animate(target, 1200); // default duration=400
+ },
+
+ allowedPosition: function(off) {
+ var x = undefined, fix_x = undefined;
+ var y = undefined, fix_y = undefined;
+ var w = this.element.width();
+ var h = this.element.height();
+ var cw = $(window).width();
+ var ch = $(window).height();
+ var off = off || this.element.offset();
+
+ if (w <= cw) {
+ var x = off.left;
+ if (x < 0)
+ fix_x = 0;
+ if (x + w > cw)
+ fix_x = cw - w;
+ } else {
+ if (x > 0)
+ fix_x = 0;
+ if (x + w < cw)
+ fix_x = cw - w;
+ }
+
+ if (h <= ch) {
+ var y = off.top;
+ if (y < 0)
+ fix_y = 0;
+ if (y + h > ch)
+ fix_y = ch - h;
+ } else {
+ if (y > 0)
+ fix_y = 0;
+ if (y + h < ch)
+ fix_y = ch - h;
+ }
+ if (fix_x !== undefined || fix_y !== undefined)
+ return { top: fix_y, left: fix_x };
+ return undefined;
+
+ },
+
+ // mark
+ // {
+ // label: "...",
+ // coords: [x, y, w, h]
+ // }
+ createMark: function(mark) {
+ var $mark = $('<div class="mark"><div class="label">' +
+ mark.label + '</div></div>');
+ var ratio = this.zoomForStep(this.currentZoom()) *
+ this.initial_size[0] / (100 * this.natural_size()[0]);
+ var scale = function (v) {
+ return v * ratio;
+ }
+ if (mark.coords[1][0] < 0 || mark.coords[1][1] < 0) { // whole
+ var s = self.natural_size();
+ if (mark.coords[1][0] < 0) mark.coords[1][0] = s[0];
+ if (mark.coords[1][1] < 0) mark.coords[1][1] = s[1];
+ }
+
+ var coords = [[scale(mark.coords[0][0]), scale(mark.coords[0][1])],
+ [scale(mark.coords[1][0]), scale(mark.coords[1][1])]];
+ this.element.append($mark);
+ $mark.width(coords[1][0] - coords[0][0]);
+ $mark.height(coords[1][1] - coords[0][1]);
+ $mark.css({left: coords[0][0], top: coords[0][1]});
+ return $mark.get(0);
+ },
+ });
fnp / wolnelektury.git / blobdiff