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在文本区域的更改事件中,我在画布上添加文本如何使用以下代码在画布上设置最终文本,我得到了很多字符串。

在此处输入图像描述

   $('#filedset').delegate(' textarea', 'change keyup', function() {

        console.log('text area change');
        var message = $(this).val();
 var text1 = new fabric.Text(message, { left: 100, top: 100 });
 canvas.add(text1);
    });
    $('#change_pos').click(function ()
    {
        console.log('button clicked');
        rect.set({ left: 120, top: 150 });
        canvas.renderAll();
    });
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1 回答 1

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我知道这个问题有点老了,但我想我会尽力帮忙,因为我必须解决确切的问题。

// Your Fabric Canvas
var canvas = new fabric.Canvas('YOURCANVASID');

// New event handler to take the value from the textarea and send to the addText utility function. 
$('.add-text').on('click', function(e){
    e.preventDefault();
    var text = $('#filedset').val();
    addText(text);
});

// Watches the keyup event handler in your textarea and updates the selected text node on canvas while you are typing. Creates a nice effect. 
// with whats being typed. 

 $('#filedset').on('keyup' , function(){

    var activeObject = canvas.getActiveObject();

     // We do a check to make sure there is an active canvas object, and see if it's text. 
    if (activeObject && activeObject.type === 'text') {
        if (!this.value) {
            return false;
        }
        else {
            activeObject.setText(this.value);
            console.log(this.value);
        }
    }

    canvas.renderAll();

});

// Function to add the text, just pass in a text string you want to add to the canvas. 
function addText(addtext) {
    var text = new fabric.Text(addtext, {  });
    canvas.add(text);
    // Center The New Text on the canvas or position it wherever
    canvas.centerObject(text);
}

这是未经测试的当前形式,因为它来自我编写的更大的命名空间应用程序。但它应该工作。您正朝着正确的方向前进,但实际上您在 keyup / change 上添加了一个新的文本节点。我希望这可以帮助别人。

于 2014-03-29T00:28:45.580 回答