How to get itext styles in fabric.js ver. 2?
In previous versions of fabric.js I used the getSelectionStyles
way it was used in a function getStyle
with great success.
In this case: when text is selected, the text fontsize-slider
will change to the current value for the first selected character.
But after upgrading to version 2+, it doesn't work anymore. The function getStyle
returns undefined
.
canvas.on('text:selection:changed', onSelectionChanged);
function onSelectionChanged() {
var obj = canvas.getActiveObject();
if (obj.selectionStart>-1) {
$('#fontSize').val(getStyle(obj,'fontSize'));
}
}
function getStyle(object, styleName) {
return (object.getSelectionStyles && object.isEditing)
? object.getSelectionStyles()[styleName] : object[styleName];
}
Here is a working example using fabric.js version 1.7.22. If you change it to the current version, it won't work. How to use getSelectionStyles
in version 2? What changed?
var canvas = new fabric.Canvas('c');
canvas.add(new fabric.IText('Fontsize test'))
canvas.on('text:selection:changed', onSelectionChanged);
$( "#fontSize" ).on("input", function() {
var obj = canvas.getActiveObject();
if (obj) {
setStyle(obj, 'fontSize', $( "#fontSize" ).val());
canvas.renderAll();
}
});
function setStyle(object, styleName, value) {
if (object.setSelectionStyles && object.isEditing) {
var style = { };
style[styleName] = value;
object.setSelectionStyles(style);
}
else {
object[styleName] = value;
}
}
function onSelectionChanged() {
var obj = canvas.getActiveObject();
if (obj.selectionStart>-1) {
$('#fontSize').val(getStyle(obj,'fontSize'));
}
}
function getStyle(object, styleName) {
return (object.getSelectionStyles && object.isEditing)
? object.getSelectionStyles()[styleName] : object[styleName];
}
canvas{
border:2px solid #000;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.7.22/fabric.min.js"></script>
<!--<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.2.3/fabric.min.js"></script>-->
<canvas id='c' width=400 height=120></canvas>
<label for="fontSize" hint="Font size"><a style="font-size:12px;color:#999">T</a><a style="font-size:19px;color:#ccc">T</a></label>
<input type="range" value="" min="1" max="120" step="1" id="fontSize">
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getSelectionStyles returns an array of style objects for the current selection.
So it object.getSelectionStyles()[styleName]
always will be undefined
.
DEMO
var canvas = new fabric.Canvas('c');
canvas.add(new fabric.IText('Hello'))
canvas.on('text:selection:changed', onSelectionChanged);
function onSelectionChanged() {
var obj = canvas.getActiveObject();
if (obj.selectionStart>-1) {
console.log(getStyle(obj,'fontSize'));
}
}
function getStyle(object, styleName) {
console.log(object.getSelectionStyles())
return object[styleName];
}
canvas{
border:2px solid #000;
}
<script src="https://rawgit.com/kangax/fabric.js/master/dist/fabric.js"></script>
<canvas id='c' width=400 height=400></canvas>
You need to use getStyleAtPosition(position)
to get style at that particular position.
var canvas = new fabric.Canvas('c');
canvas.add(new fabric.IText('Fontsize test'))
canvas.on('text:selection:changed', onSelectionChanged);
$("#fontSize").on("input", function() {
var obj = canvas.getActiveObject();
if (obj) {
setStyle(obj, 'fontSize', $("#fontSize").val());
canvas.renderAll();
}
});
function setStyle(object, styleName, value) {
if (object.setSelectionStyles && object.isEditing) {
var style = {};
style[styleName] = value;
object.setSelectionStyles(style);
} else {
object[styleName] = value;
}
}
function onSelectionChanged() {
var obj = canvas.getActiveObject();
if (obj.selectionStart > -1) {
console.log(obj.getSelectionStyles())
$('#fontSize').val(getStyle(obj, 'fontSize'));
}
}
function getStyle(object, styleName) {
return (object.getStyleAtPosition && object.isEditing) ?
object.getStyleAtPosition(object.selectionStart)[styleName] : object[styleName];
}
canvas{
border:2px solid #000;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://rawgit.com/kangax/fabric.js/master/dist/fabric.js"></script>
<!--<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.2.3/fabric.min.js"></script>-->
<canvas id='c' width=400 height=120></canvas>
<label for="fontSize" hint="Font size"><a style="font-size:12px;color:#999">T</a><a style="font-size:19px;color:#ccc">T</a></label>
<input type="range" value="" min="1" max="120" step="1" id="fontSize">
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