I'm doing an experiment with gifshot and leafletjs. I want to insert an image inside a marker popup but the problem is that the popup will not adapt his size to fit the content. I've tried to apply some css rules but it will not be displayed on the marker that is present on the map, I need some tips and help to fix this.
Here is an image that is showing my problem:
var animatedImage;
map.on('click', function(event){
marker = map.mouseEventToLatLng(event.originalEvent);
var icns = L.marker([marker.lat, marker.lng]).addTo(map);
sessionStorage.setItem('lat', marker.lat);
sessionStorage.setItem('lng', marker.lng);
gifshot.createGIF({}, function(obj){
if(!obj.error) {
var image = obj.image,
animatedImage = document.createElement('img');
animatedImage.src = image;
icns.bindPopup(animatedImage).openPopup();
}
});
});
Any help will be appreciated.
I need to remove the image and hide its label in the dialog when a value is selected from another dropdown. I also want to remove the image from the component itself.
Currently, I am able to hide the image in the dialog, but the image is not removed and is passed to the JSP file. I am using html5smartimage as xtype.
This is the dialog.xml code:
<imagepath jcr:primaryType="cq:Widget"
ddGroups="[media]"
fieldDescription="Best display supported image for large (400 x 270px)
and for small(260 x 193px)."
fieldLabel="Thumbnail Image"
fileReferenceParameter="./thumbnail"
height="200"
id="thumbnail"
name="./bkgimage"
rootPath=""
width="150"
xtype="html5smartimage"/>
Here's the JavaScript function:
function(comp) {
var panel = comp.findParentByType("panel");
var thumbnail = panel.getComponent("thumbnail");
var dropdown = panel.findById("height");
var width = panel.findById("width");
var thumbnailAltText = panel.findById("thumbnailAltText");
if (dropdown.getValue() == 'half-height') {
thumbnail.hide();
thumbnailAltText.hide();
thumbnail.setValue(' ');
} else {
thumbnail.show();
thumbnailAltText.show();
}
}
I have an HTML Dom looking like this:
<div class="mydiv" id="mydivId">
<img src="../xyz.png" class="gwt-Image imgWrapper" draggable="false">
</div>
I'm trying to change the img Source, so i made the following to access the image without success:
Image imageElement = (Image) Document.get()
.getElementById("mydivId")
.getElementsByTagName("img").getItem(0);
How can i get the <img> dom element as Image then change its Source?
Get the ImageElement with
ImageElement image = (ImageElement) DOM.getElementById("mydivId").getFirstChildElement();
or create an Image widget by wrapping the existing img element like in
Image img = Image.wrap(DOM.getElementById("mydivId").getFirstChildElement());
As mentioned by Saeed Zarinfam it gets easier if you assign an unique id to the image itself.
You have to assign an id to your image tag:
<div class="mydiv" id="mydivId">
<img src="../xyz.png" class="gwt-Image imgWrapper" draggable="false" id="myImgId">
</div>
Then you can access to it using following code:
Element elem = DOM.getElementById("myImgId");
Window.alert(elem.getAttribute("src"));
Or if you do not want to assign an id to your image tag, you can use following code:
Element elem = DOM.getElementById("mydivId");
Window.alert(elem.getFirstChildElement().getAttribute("src"));
How can I drop items (like image, or other object from other canvas) into canvas which is managed by fabricjs? I have found many examples how to move items inside canvas but I would like to drag and drop item from outer element into canvas.
Since you asked for an example and I haven't tried it out myself yet, here goes:
Example Fiddle
Markup
<div id="images">
<img draggable="true" src="http://i.imgur.com/8rmMZI3.jpg" width="250" height="250"></img>
<img draggable="true" src="http://i.imgur.com/q9aLMza.png" width="252" height="295"></img>
<img draggable="true" src="http://i.imgur.com/wMU4SFn.jpg" width="238" height="319"></img>
</div>
<div id="canvas-container">
<canvas id="canvas" width="800" height="600"></canvas>
</div>
JS Breakdown
1. Fabric.canvas instance
First we want our canvas, of course:
var canvas = new fabric.Canvas('c');
2. Feature Detection (optional)
Not sure this is necessary, since the fact that you have a canvas makes it very likely that the browser has Drag and Drop as well. Were you to use it, you can do so like this, using Modernizr:
if (Modernizr.draganddrop) {
// Browser supports HTML5 DnD.
// Bind the event listeners for the image elements
// Bind the event listeners for the canvas
} else {
// Replace with a fallback to a library solution.
alert("This browser doesn't support the HTML5 Drag and Drop API.");
}
3. Events
Again, unlike the source article I below, the source and target elements are different (in that articles's example, you just move divs around within the same parent container), so I failed to notice that some of the events are meant for the element being dragged, but most are bound to the element into which you are dropping.
NOTE: I know this is technically a question about Fabric.js, but it's really kind of a question about Drag and Drop in the context of adding objects to a <canvas> with Fabric.js, which is why I'm going a bit more in depth about the DnD stuff now.
For the <img>
dragstart (I added a class here to lower the opacity)
dragend (and removed that class here)
For #canvas-container:
dragenter (added a class to give the canvas container that nifty dotted line)
dragover: Here you can set the event.dataTransfer.dropEffect property to show one of the native cursor types. The default would be 'move' here, but I set it to 'copy' since I don't actually remove the <img> element (in fact in the fiddle you can, for example create several McClures).
dragleave (removed the dotted line here)
drop: The handler for this event creates and adds the fabric.Image object (see the fiddle).
if (Modernizr.draganddrop) {
// Browser supports HTML5 DnD.
// Bind the event listeners for the image elements
var images = document.querySelectorAll('#images img');
[].forEach.call(images, function (img) {
img.addEventListener('dragstart', handleDragStart, false);
img.addEventListener('dragend', handleDragEnd, false);
});
// Bind the event listeners for the canvas
var canvasContainer = document.getElementById('canvas-container');
canvasContainer.addEventListener('dragenter', handleDragEnter, false);
canvasContainer.addEventListener('dragover', handleDragOver, false);
canvasContainer.addEventListener('dragleave', handleDragLeave, false);
canvasContainer.addEventListener('drop', handleDrop, false);
} else {
// Replace with a fallback to a library solution.
alert("This browser doesn't support the HTML5 Drag and Drop API.");
}
Sources:
HTML5 Rocks - Native HTML5 Drag and Drop
Modernizr
Web Platform Docs > DOM > Properties - dropEffect
Web Platform Docs > DOM > Events
dragstart
dragend
dragenter
dragover
dragleave
drop
I had gone through fiddle of #natchiketa, And fixed the problem , just check this fiddle..
http://jsfiddle.net/Ahammadalipk/w8kkc/185/
window.onload = function () {
var canvas = new fabric.Canvas('canvas');
/*
NOTE: the start and end handlers are events for the <img> elements; the rest are bound to
the canvas container.
*/
function handleDragStart(e) {
[].forEach.call(images, function (img) {
img.classList.remove('img_dragging');
});
this.classList.add('img_dragging');
}
function handleDragOver(e) {
if (e.preventDefault) {
e.preventDefault();
}
e.dataTransfer.dropEffect = 'copy';
return false;
}
function handleDragEnter(e) {
this.classList.add('over');
}
function handleDragLeave(e) {
this.classList.remove('over');
}
function handleDrop(e) {
if (e.stopPropagation) {
e.stopPropagation(); // stops the browser from redirecting.
}
var img = document.querySelector('#images img.img_dragging');
var newImage = new fabric.Image(img, {
width: img.width,
height: img.height,
// Set the center of the new object based on the event coordinates relative
// to the canvas container.
left: e.layerX,
top: e.layerY
});
newImage.hasControls = newImage.hasBorders = false;
canvas.add(newImage);
return false;
}
function handleDragEnd(e) {
// this/e.target is the source node.
[].forEach.call(images, function (img) {
img.classList.remove('img_dragging');
});
}
if (Modernizr.draganddrop) {
var images = document.querySelectorAll('#images img');
[].forEach.call(images, function (img) {
img.addEventListener('dragstart', handleDragStart, false);
img.addEventListener('dragend', handleDragEnd, false);
});
var canvasContainer = document.getElementById("canvas-container");
canvasContainer.addEventListener('dragenter', handleDragEnter, false);
canvasContainer.addEventListener('dragover', handleDragOver, false);
canvasContainer.addEventListener('dragleave', handleDragLeave, false);
canvasContainer.addEventListener('drop', handleDrop, false);
} else {
alert("This browser doesn't support the HTML5 Drag and Drop API.");
}
}
Thanks
Well, the question is quite old^^
I have updateted the fiddle, no it will work in Firefox as well.
Fiddle
function handleDrop(e) {
// this / e.target is current target element.
e.preventDefault(); //I've altert this line for FireFox
As far as I understand, drag and drop is not already provided by fabricjs,
fiddling it will be quite interesting.
Well I m new to javascript and fabricJS but I think this fiddle might help
fiddle
html code
<div class="img_cont">
<img class="img" id="ele1" draggable="true" ondragstart="dragElement(event)" src="https://webkit.org/wp-content/uploads/STP-300x300.png">
<img class="img" id="ele2" draggable="true" ondragstart="dragElement(event)" src="https://webkit.org/wp-content/uploads/ephy-webkit-graphic.png">
<img class="img" id="ele3" draggable="true" ondragstart="dragElement(event)" src="https://res.cloudinary.com/css-tricks/image/upload/w_600,q_auto,f_auto/buysellads/uu/7/112766/1646327381-MC_CSSTricks_Logo_600x600-_1_.png">
<img class="img" id="ele4" draggable="true" ondragstart="dragElement(event)" src="https://miro.medium.com/max/1400/1*9hd_8qR0CMZ8L0pVbFLjDw.png">
</div>
<br>
<div id="canvas_cont" ondragover="allowDrop(event)" ondrop="dropElement(event)">
<canvas id="canvas" width="650" height="350" ></canvas>
</div>
javascript code
// allowDrop function called on ondragover event.
function allowDrop(e) {
e.preventDefault();
}
//dragElement function called on ondrag event.
function dragElement(e) {
e.dataTransfer.setData("id", e.target.id); //transfer the "data" i.e. id of the target dragged.
}
//Initializing fabric canvas on window load event.
var canvas;
window.onload = function(){
canvas = new fabric.Canvas(document.getElementById("canvas"));
}
//dropElement function called on ondrop event.
function dropElement(e) {
e.preventDefault();
var data = e.dataTransfer.getData("id"); //receiving the "data" i.e. id of the target dropped.
var imag = document.getElementById(data); //getting the target image info through its id.
var img = new fabric.Image(imag, { //initializing the fabric image.
left: e.layerX - 80, //positioning the target on exact position of mouse event drop through event.layerX,Y.
top: e.layerY - 40,
});
img.scaleToWidth(imag.width); //scaling the image height and width with target height and width, scaleToWidth, scaleToHeight fabric inbuilt function.
img.scaleToHeight(imag.height);
canvas.add(img);
}
The accepted answer no longer works.
This is for drag and drop from desktop using the dataTransfer interface.
canvas.on('drop', function(event) {
// prevent the file to open in new tab
event.e.stopPropagation();
event.e.stopImmediatePropagation();
event.e.preventDefault();
// Use DataTransfer interface to access the file(s)
if(event.e.dataTransfer.files.length > 0){
var files = event.e.dataTransfer.files;
for (var i = 0, f; f = files[i]; i++) {
// Only process image files.
if (f.type.match('image.*')) {
// Read the File objects in this FileList.
var reader = new FileReader();
// listener for the onload event
reader.onload = function(evt) {
// put image on canvas
fabric.Image.fromURL(evt.target.result, function(obj) {
obj.scaleToHeight(canvas.height);
obj.set('strokeWidth',0);
canvas.add(obj);
});
};
// Read in the image file as a data URL.
reader.readAsDataURL(f);
}
}
}
});
Resources
https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API/File_drag_and_drop
I have a construction:
<div id="div">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" id="svg">
<image x="2cm" y="2cm" width="5cm" height="5cm" id="img" xlink:href="pic.jpg"></image>
</svg>
</div>
I want to get pic.jpg url and I need to begin from the most outer div, not exactly from the source <image> element:
var div = document.getElementById("div");
var svg = div.getElementsByTagNameNS('http://www.w3.org/2000/svg', 'svg')[0];
var img = svg.getElementsByTagNameNS('http://www.w3.org/2000/svg', 'image')[0];
var url = img.getAttribute('xlink:href'); // Please pay attention I do not use getAttributeNS(), just usual getAttribute()
alert(url); // pic.jpg, works fine
My question is what is the right way to get such kind of attributes from element like SVG and its children?
Because before I tried to do this way and it also worked fine in Chrome (I didn't try other browsers):
var svg = div.getElementsByTagName('svg')[0]; // I do not use NS
var img = svg.getElementsByTagName('image')[0];
var url = img.getAttribute('xlink:href'); // and do not use getAttributeNS() here too
alert(url); // pic.jpg, works fine
But when I tried to use getAttributeNS() I got blank result:
var svg = div.getElementsByTagNameNS('http://www.w3.org/2000/svg', 'svg')[0];
var img = svg.getElementsByTagNameNS('http://www.w3.org/2000/svg', 'image')[0];
// Please pay attention I do use getAttributeNS()
var url = img.getAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href');
alert(url); // but I got black result, empty alert window
The correct usage is getAttributeNS('http://www.w3.org/1999/xlink', 'href');