89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
function ImageViewer(viewer, file) {
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this.viewer = viewer;
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this.file = file;
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this.zoomed = false;
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this.x = 0;
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this.y = 0;
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this.dragging = false;
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this.container = document.createElement("dv");
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this.container.classList = "image-container";
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// this.container.style.lineHeight = "0";
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this.element = document.createElement("img");
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this.element.classList = "pannable center drop-shadow";
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this.element.src = apiEndpoint+"/file/"+this.file.id;
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this.element.addEventListener("dblclick", (e) => { return this.doubleclick(e); });
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this.element.addEventListener("doubletap", (e) => { return this.doubleclick(e); });
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this.element.addEventListener("mousedown", (e) => { return this.mousedown(e); });
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document.addEventListener("mousemove", (e) => { return this.mousemove(e); });
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document.addEventListener("mouseup", (e) => { return this.mouseup(e); });
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this.container.appendChild(this.element);
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}
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ImageViewer.prototype.render = function(parent) {
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parent.appendChild(this.container);
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}
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ImageViewer.prototype.doubleclick = function(e) {
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if (this.zoomed) {
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this.element.style.maxWidth = "100%";
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this.element.style.maxHeight = "100%";
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this.element.style.top = "50%";
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this.element.style.left = "auto";
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this.element.style.transform = "translateY(-50%)";
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this.container.style.overflow = "hidden";
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this.zoomed = false;
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} else {
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this.element.style.maxWidth = "none";
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this.element.style.maxHeight = "none";
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this.element.style.top = "0";
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this.element.style.left = "";
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this.element.style.transform = "none";
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this.container.style.overflow = "scroll";
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this.zoomed = true;
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}
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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ImageViewer.prototype.mousedown = function(e) {
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if (!this.dragging && e.which === 1 && this.zoomed) {
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this.x = e.pageX;
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this.y = e.pageY;
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this.dragging = true;
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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}
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ImageViewer.prototype.mousemove = function(e) {
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if (this.dragging) {
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this.container.scrollLeft = this.container.scrollLeft - (e.pageX - this.x);
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this.container.scrollTop = this.container.scrollTop - (e.pageY - this.y);
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this.x = e.pageX;
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this.y = e.pageY;
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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}
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ImageViewer.prototype.mouseup = function(e) {
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if (this.dragging) {
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this.dragging = false;
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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}
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