Fabric JS object alignment not working as expected - html

I tried to align an object within a group. When I align the first object to the left, center or right it was successful, then I tried for the second object, the first object moved by itself!
Please see the image below (GIF):
Fabric JS Object Alignment
I used HTML5 Canvas, fabric JS & jQuery for the development.
Here is the fiddle: https://jsfiddle.net/mt0ccqq2/
Here is the Code:
$(document).ready(function() {
var canvas = new fabric.Canvas("canvas", { preserveObjectStacking: true });
// create rectangle
var rect = new fabric.Rect({
left: 50,
top: 50,
width: 300,
height: 100,
fill: '#ff0000'
});
// create circle
var text = new fabric.Text("Align Me next", {
left: 190,
top: 320,
fontSize: 20
});
// create text
var text2 = new fabric.Text("Align me first", {
left: 100,
top: 200,
fontSize: 20
});
canvas.add(rect, text, text2);
canvas.renderAll();
// GROUP ON SELECTION
canvas.on("selection:created", function(e) {
var activeObj = canvas.getActiveGroup();
if(activeObj.type === "group") {
console.log("Group created");
var groupWidth = e.target.getWidth();
var groupHeight = e.target.getHeight();
e.target.forEachObject(function(obj) {
var itemWidth = obj.getBoundingRect().width;
var itemHeight = obj.getBoundingRect().height;
// ================================
// OBJECT ALIGNMENT: " H-LEFT "
// ================================
$('#objAlignLeft').click(function() {
obj.set({
left: -(groupWidth / 2),
originX: 'left'
});
obj.setCoords();
canvas.renderAll();
});
// ================================
// OBJECT ALIGNMENT: " H-CENTER "
// ================================
$('#objAlignCenter').click(function() {
obj.set({
left: (0 - itemWidth/2),
originX: 'left'
});
obj.setCoords();
canvas.renderAll();
});
// ================================
// OBJECT ALIGNMENT: " H-RIGHT "
// ================================
$('#objAlignRight').click(function() {
obj.set({
left: (groupWidth/2 - itemWidth/2),
originX: 'center'
});
obj.setCoords();
canvas.renderAll();
});
});
}
}); // END OF " SELECTION:CREATED "
});
Any help would be appreciated. Thanks in advance.

I think this is what you're looking for, right?
Here's the tweak to your code...
canvas.on("selection:cleared", function(e) {
$('#objAlignLeft').off('click');
$('#objAlignCenter').off('click');
$('#objAlignRight').off('click');
});
And here's the all important JSFiddle, https://jsfiddle.net/rekrah/xxrqbhph/.
Let me know if you have any further questions. Happy to help!

Related

konva.js transformer crop box behavior problem

Is there any way to do the same with the cropbox action in the link below?
I am using the latest version of konva, but it seems that the link does not work after version 4.
https://codepen.io/kade87/pen/vYavQMp?editors=1011
How can I use it to work like a link in the latest version?
We must solve this problem. Or is there a javascript crop library that supports both pc and mobile? If so, please recommend. However, most of the libraries didn't work the way we wanted.
<script src="https://unpkg.com/konva#^4/konva.min.js"></script>
<div id="container"></div>
<script>
// noprotect
const stage = new Konva.Stage({
container: 'container',
width: window.innerWidth,
height: window.innerHeight
});
const layer = new Konva.Layer();
stage.add(layer);
Konva.Image.fromURL('https://i.imgur.com/ktWThtZ.png', img => {
img.setAttrs({
width: stage.width(),
height: stage.height(),
opacity: 0.5
});
layer.add(img)
})
Konva.Image.fromURL('https://i.imgur.com/ktWThtZ.png', img => {
var group = new Konva.Group({
clipFunc: (ctx) => {
ctx.save();
ctx.translate(fakeShape.x(), fakeShape.y())
ctx.rotate(Konva.getAngle(fakeShape.rotation()))
ctx.rect(0, 0, fakeShape.width() * fakeShape.scaleX(), fakeShape.height() * fakeShape.scaleY());
ctx.restore()
}
})
layer.add(group);
img.setAttrs({
width: stage.width(),
height: stage.height(),
});
group.add(img);
var fakeShape = new Konva.Rect({
width: 100,
height: 100,
x: 100,
y: 100,
fill: 'rgba(0,0,0,0)',
draggable: true
})
layer.add(fakeShape);
var tr = new Konva.Transformer({
enabledAnchors: ['top-left', 'bottom-right'],
rotateEnabled: false,
keepRatio: false,
flipEnabled: true,
node: fakeShape,
boundBoxFunc: (oldBox, newBox) => {
if(newBox.width < 50) {
newBox.width = 50
// newBox.x = oldBox.x
}
if(newBox.height < 50) {
newBox.height = 50
// newBox.y = oldBox.y
}
return newBox
}
});
layer.add(tr);
layer.draw();
});
</script>

How to convert HTML page as well as a Table using jsPDF and Autotable

I've found a lot of information online regarding either JSPDF or Autotable but none that combine both, all I am looking to achieve is to use the ID of the main DIV to generate a full HTML page PDF although I have a table in that page, and would like the table formatted using the Autotable function as it looks awful just using JSPDF.
I have tried variations such as this but nothing seems to work.
My HTML is under id="content" and the table is id="basic_table"
<script type="text/javascript">
function generate() {
var doc = new jsPDF('p', 'pt', 'letter');
var htmlstring = '';
var tempVarToCheckPageHeight = 0;
var pageHeight = 0;
pageHeight = doc.internal.pageSize.height;
specialElementHandlers = {
// element with id of "bypass" - jQuery style selector
'#bypassme': function(element, renderer) {
// true = "handled elsewhere, bypass text extraction"
return true
}
};
margins = {
top: 150,
bottom: 60,
left: 40,
right: 40,
width: 600
};
var y = 20;
doc.setLineWidth(2);
doc.fromHTML("#content");
doc.autoTable({
html: '#simple_table',
startY: 70,
theme: 'grid',
columnStyles: {
0: {
cellWidth: 180,
},
1: {
cellWidth: 180,
},
2: {
cellWidth: 180,
}
},
styles: {
minCellHeight: 40
}
})
doc.save('Marks_Of_Students.pdf');
}
</script>

JoinJS - fromJSON method error: "dia.ElementView: markup required"

I have a problem that I can't solve. I want to use JointJS fromJSON function to reconstruct the flowchart from a JSON (previously exported using JoinJS's toJSON function.
The problem is that the call to the fromJSON function always returns the following error:
Whether I call it inside the hook mounted () or call it from the click of a button.
For completeness I also want to say that I am using Vue.js.
The code I'm using instead is the following:
<template>
<div class="wrapper">
<button v-on:click="getGraphJSON">Get graph JSON</button>
<button v-on:click="resetGraphJSON">Restore graph from JSON</button>
<div id="myholder"></div>
</div>
</template>
<script>
const _ = require('lodash')
const joint = require('jointjs')
const g = require('../../node_modules/jointjs/dist/geometry.js')
const backbone = require('../../node_modules/backbone/backbone.js')
const $ = require('../../node_modules/jquery/dist/jquery.js')
import '../../node_modules/jointjs/dist/joint.css';
var CustomRectangle = joint.shapes.standard.Rectangle.define('CustomRectangle', {
type: 'CustomRectangle',
attrs: {
body: {
rx: 10, // add a corner radius
ry: 10,
strokeWidth: 1,
fill: 'cornflowerblue'
},
label: {
textAnchor: 'left', // align text to left
refX: 10, // offset text from right edge of model bbox
fill: 'white',
fontSize: 18
}
}
}, {
markup: [{
tagName: 'rect',
selector: 'body',
}, {
tagName: 'text',
selector: 'label'
}]
}, {
createRandom: function() {
var rectangle = new this();
var fill = '#' + ('000000' + Math.floor(Math.random() * 16777215).toString(16)).slice(-6);
var stroke = '#' + ('000000' + Math.floor(Math.random() * 16777215).toString(16)).slice(-6);
var strokeWidth = Math.floor(Math.random() * 6);
var strokeDasharray = Math.floor(Math.random() * 6) + ' ' + Math.floor(Math.random() * 6);
var radius = Math.floor(Math.random() * 21);
rectangle.attr({
body: {
fill: fill,
stroke: stroke,
strokeWidth: strokeWidth,
strokeDasharray: strokeDasharray,
rx: radius,
ry: radius
},
label: { // ensure visibility on dark backgrounds
fill: 'black',
stroke: 'white',
strokeWidth: 1,
fontWeight: 'bold'
}
});
return rectangle;
}
});
export default {
name: 'JointChartRestorable',
data() {
return {
graph: null,
paper: null,
// graphJSON: JSON.parse('{"cells":[{"type":"standard.Rectangle","position":{"x":100,"y":30},"size":{"width":100,"height":40},"angle":0,"id":"049776c9-7b6d-4aaa-8b02-1edc3bea9852","z":1,"attrs":{"body":{"fill":"blue"},"label":{"fill":"white","text":"Rect #1"}}},{"type":"standard.Rectangle","position":{"x":400,"y":30},"size":{"width":100,"height":40},"angle":0,"id":"b6e77973-1195-4749-99e1-728549329b11","z":2,"attrs":{"body":{"fill":"#2C3E50","rx":5,"ry":5},"label":{"fontSize":18,"fill":"#3498DB","text":"Rect #2","fontWeight":"bold","fontVariant":"small-caps"}}},{"type":"standard.Link","source":{"id":"049776c9-7b6d-4aaa-8b02-1edc3bea9852"},"target":{"id":"b6e77973-1195-4749-99e1-728549329b11"},"id":"4ed8e3b3-55de-4ad2-b79e-d4848adc4a58","labels":[{"attrs":{"text":{"text":"Hello, World!"}}}],"z":3,"attrs":{"line":{"stroke":"blue","strokeWidth":1,"targetMarker":{"d":"M 10 -5 0 0 10 5 Z","stroke":"black","fill":"yellow"},"sourceMarker":{"type":"path","stroke":"black","fill":"red","d":"M 10 -5 0 0 10 5 Z"}}}}],"graphCustomProperty":true,"graphExportTime":1563951791966}')
// graphJSON: JSON.parse('{"cells":[{"type":"examples.CustomRectangle","position":{"x":90,"y":30},"size":{"width":100,"height":40},"angle":0,"id":"faa7f957-4691-4bb2-b907-b2054f7e07de","z":1,"attrs":{"body":{"fill":"blue"},"label":{"text":"Rect #1"}}}]}')
graphJSON: JSON.parse('{"cells":[{"type":"CustomRectangle","position":{"x":100,"y":30},"size":{"width":100,"height":40},"angle":0,"id":"f02da591-c03c-479f-88cf-55c291064ca8","z":1,"attrs":{"body":{"fill":"blue"},"label":{"text":"Rect #1"}}}]}')
};
},
methods: {
getGraphJSON: function() {
this.graphJSON = this.graph.toJSON();
console.log(JSON.stringify(this.graphJSON));
this.graph.get('graphCustomProperty'); // true
this.graph.get('graphExportTime');
},
resetGraphJSON: function() {
if(this.graphJSON !== undefined && this.graphJSON !== null && this.graphJSON !== '') {
this.graph.fromJSON(this.graphJSON);
// this.paper.model.set(this.graphJSON);
} else {
alert('Devi prima cliccare sul tasto "Get graph JSON" almeno una volta');
}
}
},
mounted() {
this.graph = new joint.dia.Graph();
this.graph.fromJSON(this.graphJSON);
// this.graph.set('graphCustomProperty', true);
// this.graph.set('graphExportTime', Date.now());
this.paper = new joint.dia.Paper({
el: document.getElementById('myholder'),
model: this.graph,
width: '100%',
height: 600,
gridSize: 10,
drawGrid: true,
background: {
color: 'rgba(0, 255, 0, 0.3)'
},
// interactive: false, // disable default interaction (e.g. dragging)
/*elementView: joint.dia.ElementView.extend({
pointerdblclick: function(evt, x, y) {
joint.dia.CellView.prototype.pointerdblclick.apply(this, arguments);
this.notify('element:pointerdblclick', evt, x, y);
this.model.remove();
}
}),
linkView: joint.dia.LinkView.extend({
pointerdblclick: function(evt, x, y) {
joint.dia.CellView.prototype.pointerdblclick.apply(this, arguments);
this.notify('link:pointerdblclick', evt, x, y);
this.model.remove();
}
})*/
});
/*this.paper.on('cell:pointerdblclick', function(cellView) {
var isElement = cellView.model.isElement();
var message = (isElement ? 'Element' : 'Link') + ' removed';
eventOutputLink.attr('label/text', message);
eventOutputLink.attr('body/visibility', 'visible');
eventOutputLink.attr('label/visibility', 'visible');
});*/
/***************************************************/
/************** GRAPH ELEMENT SAMPLE ***************/
/***************************************************/
// var rect = new joint.shapes.standard.Rectangle();
// var rect = new CustomRectangle();
// rect.position(100, 30);
// rect.resize(100, 40);
// rect.attr({
// body: {
// fill: 'blue'
// },
// label: {
// text: 'Rect #1',
// fill: 'white'
// }
// });
// rect.addTo(this.graph);
/***************************************************/
/************** GRAPH ELEMENT SAMPLE ***************/
/***************************************************/
}
}
</script>
Right now I'm using a custom element, previously defined, but I've also done tests using the standard Rectangle element of JointJS.
Can anyone tell me if I'm doing something wrong?
Many thanks in advance.
Markup object could not be found in element that's reason why this error is getting. After it's imported jointjs to the vueJS project through jointjs or rabbit dependency;
import * as joint from 'jointjs' or import * as joint from 'rabbit'
window.joint = joint;
joint should be adjusted as global in environment by using window.

Fabric.js clipping individual objects dynamically

I am dynamically adding a rect element to crop/clip (using clipTo) a selected element,
It works perfect at the first time but when i add a second element to the canvas and begin to crop the second element the first element looses the crop/clip. Below is my code, there are 2 buttons 1 to start crop/clip (places a dynamic rect over the element to be cropped) second to do the cropping/clipping.
$('#crop').on('click', function (event) {
var left = el.left - object.left;
var top = el.top - object.top;
left *= 1;
top *= 1;
var width = el.width * 1;
var height = el.height * 1;
object.clipTo = function (ctx)
{
ctx.rect(-(el.width/2)+left, -(el.height/2)+top, parseInt(width*el.scaleX), parseInt(el.scaleY*height));
}
for(var i=0; i<$("#layers li").size();i++)
{
canvas.item(i).selectable= true;
}
disabled = true;
canvas.remove(canvas.getActiveObject());
lastActive = object;
canvas.renderAll();
});
$('#startCrop').on('click',function(){
canvas.remove(el);
if(canvas.getActiveObject())
{
object=canvas.getActiveObject();
if (lastActive && lastActive !== object) {
lastActive.clipTo = null;
}
el = new fabric.Rect
({
fill: 'rgba(0,0,0,0.3)',
originX: 'left',
originY: 'top',
stroke: '#ccc',
strokeDashArray: [2, 2],
opacity: 1,
width: 1,
height: 1,
borderColor: '#36fd00',
cornerColor: 'green',
hasRotatingPoint:false
});
el.left=canvas.getActiveObject().left;
selection_object_left=canvas.getActiveObject().left;
selection_object_top=canvas.getActiveObject().top;
el.top=canvas.getActiveObject().top;
el.width=canvas.getActiveObject().width*canvas.getActiveObject().scaleX;
el.height=canvas.getActiveObject().height*canvas.getActiveObject().scaleY;
canvas.add(el);
canvas.setActiveObject(el);
for(var i=0; i<$("#layers li").size();i++)
{
canvas.item(i).selectable= false;
}
}
else{
alert("Please select an object or layer");
}
});
Is this what you're looking for? http://jsfiddle.net/86bTc/4/
You set the lastActive.clipTo = null;
try this code
function crop()
{
if (!fabric.Canvas.supports('toDataURL')) {
alert('This browser doesn\'t provide means to serialize canvas to an image');
}
else {
var obj = canvas.getActiveObject();
fabric.Image.fromURL(canvas.toDataURL({
format: 'png',
left: obj.left + 1,
top: obj.top + 1,
width: obj.width * obj.scaleX,
height: obj.height * obj.scaleY,
}), function (img) {
canvas.remove(obj);
canvas.remove(ao);
canvas.add(img);
canvas.renderAll();
})
}
}
;
function Select() {
ao = canvas.getActiveObject();
if (!ao)
return;
canvas.bringToFront(ao);
ao.selectable = false;
canvas.add(new fabric.Rect({
left: 200,
top: 200,
width: 200,
height: 200,
fill: 'transparent',
stroke: '#000000',
hasRotatingPoint: false,
strokeDashArray: [5, 5],
cornerSize: 8,
}));
}

Dynamically generated buttons and pass variable to new window with JSON

First I am a beginner and this is my first app. I have been working on this app for several days and I am stuck. On the page remote_read-org-3.js I am creating buttons that are a list of states. These are being pulled from a mySQL database. This part is working. I need to pass the stateabbr to the next window when the button is clicked. The problem is it passes the last state in the list no matter which button I click.
This is remote_read-org.js It may not been the cleanest code but I am still working through the how to's
var currentWin = Ti.UI.currentWindow;
var view02 = Titanium.UI.createView({
top:0,
left:0,
height: '100%',
width: '100%',
backgroundImage: 'images/wcs_background_2.jpg',
})
var label01 = Titanium.UI.createLabel({
text: "US STATES",
top:25,
left:125,
height:'auto',
width:'175',
textAlign: "left",
font:{fontFamily:'Arial',fontWeight:'bold',fontSize:24},
color: "#1c1e3b",
})
var label02 = Titanium.UI.createLabel({
text: "Attachments",
top:50,
left: 125,
height:'24',
width:'150',
textAlign: "left",
font:{fontFamily:'Arial',fontWeight:'bold',fontSize:18},
color: "#1c1e3b",
})
var view01 = Titanium.UI.createView({
top:90,
left:70,
height: 375,
width: Ti.UI.FILL,
})
var currentWin = Ti.UI.currentWindow;
var sendit = Ti.Network.createHTTPClient();
sendit.open('GET', 'http://localhost/test/read.php');
sendit.send();
sendit.onload = function(){
var json = JSON.parse(this.responseText);
var json = json.states;
var dataArray = [];
var scroller = Ti.UI.createScrollView({
height: Ti.UI.FILL,
width: Ti.UI.FILL,
});
var brandView = Ti.UI.createView({ //Primary view for buttons
title: 'Hello',
top:0,
left:0,
height : Ti.UI.FILL,
width : Ti.UI.FILL,
contentHeight : "auto",
backgroundColor : "transparent",
layout : "horizontal",
horizontalBounce :false,
});
scroller.add(brandView);
view01.add(scroller);
var pos;
for( pos=0; pos < json.length; pos++){
dataArray.push({title:'' + json[pos].stateAbbr + ''});
// set the array to the tableView
var btn = Ti.UI.createButton({
title: json[pos].stateAbbr,
width: 60,
height: 70,
top: pos * 0, // space the buttons at 105
left: 2,
backgroundImage: 'images/state_icon.png',
MyID: json[pos].stateAbbr,
});
btn.addEventListener('click', function(e) {
var newWindow = Titanium.UI.createWindow({
url: 'remote_read_acc.js',
MyID: btn.MyID
});
newWindow.open(newWindow);
});
brandView.add(btn);
};
};
var brandView = Ti.UI.createView({
});
view02.add(view01);
view02.add(label01);
view02.add(label02);
currentWin.add(view02);
I need to pass the stateabbr to this new window
remote_read_acc.js
var currentWin = Ti.UI.currentWindow;
var view02 = Titanium.UI.createView({
top:0,
left:0,
height: '100%',
width: '100%',
backgroundImage: 'images/wcs_background_2.jpg',
})
var label01 = Titanium.UI.createLabel({
text: "US STATES",
top:25,
left:125,
height:'auto',
width:'175',
textAlign: "left",
font:{fontFamily:'Arial',fontWeight:'bold',fontSize:24},
color: "#1c1e3b",
})
var label02 = Titanium.UI.createLabel({
text: "Attachments",
top:50,
left: 125,
height:'24',
width:'150',
textAlign: "left",
font:{fontFamily:'Arial',fontWeight:'bold',fontSize:18},
color: "#1c1e3b",
})
var view01 = Titanium.UI.createView({
top:90,
left:90,
height: 375,
width: Ti.UI.FILL,
})
var currentWin = Ti.UI.currentWindow;
var sendit = Ti.Network.createHTTPClient();
sendit.open('GET', 'http://localhost/test/attachments.php');
sendit.send();
sendit.onload = function(){
var json = JSON.parse(this.responseText);
var json = json.attachments;
var dataArray = [];
var scroller = Ti.UI.createScrollView({
height: Ti.UI.FILL,
width: Ti.UI.FILL,
});
var brandView = Ti.UI.createView({ //Primary view for buttons
title: 'Hello',
top:0,
left:0,
height : Ti.UI.FILL,
width : Ti.UI.FILL,
contentHeight : "auto",
backgroundColor : "transparent",
layout : "horizontal",
horizontalBounce :false,
});
scroller.add(brandView);
view01.add(scroller);
var pos;
for( pos=0; pos < json.length; pos++){
dataArray.push({title:'' + json[pos].attachmentName + ''});
// set the array to the tableView
var btn = Ti.UI.createButton({
title: json[pos].attachmentName ,
width: 190,
height: 30,
top: pos * 0, // space the buttons at 105
left: 2,
MyID: json[pos].attachmentName,
});
btn.addEventListener('click', function(e) {
var newWindow = Titanium.UI.createWindow({
url: '',
});
newWindow.open(newWindow);
brandView.add(btn);
};
};
var brandView = Ti.UI.createView({
});
view02.add(view01);
view02.add(label01);
view02.add(label02);
currentWin.add(view02);
I also then need to use that stateabbr that I passed to query the dataArray to pull just the values from the array that matches the stateabbr variable. so I can display them on this page.
Any help would be greatly appreciated
It's passing the last state in the list cause you are adding event listeners in a for loop and ignoring JavaScript scope rules (they are not the easiest to understand that's for sure). So what is happening is that btn is always equal to the last btn you create. Instead try this, use the source attribute of every click event, this separates your inner scope from the outer scope of the for loop:
btn.addEventListener('click', function(e) {
var newWindow = Titanium.UI.createWindow({
url: 'remote_read_acc.js',
MyID: e.source.MyID // Get the actual button that was clicked
});
newWindow.open(newWindow);
});
To optimize this even further I would move the event listener function outside of the loop. Also, I wouldn't use the url attribute of the window, as that will open an entirely different JavaScript context, which is pretty heavyweight, instead try to use the require() CommonJS directive.