Extjs how to change background color of htmleditor dynamically

Question

`I have added a custom button in htmleditor which will change the background color of the preview area.I have tried everything but can't seem to get it

Ext.onReady(function () {
   Ext.tip.QuickTipManager.init(); // enable tooltips
 new Ext.panel.Panel({
    title: 'HTML Editor',
    renderTo: Ext.getBody(),
    width: 550,
    height: 250,
    frame: true,
    layout: 'fit',
    items: {
        xtype: 'htmleditor',
        enableColors: false,
        enableAlignments: false,
        listeners:{
                render:function(){
                        this.getToolbar().add({
                                xtype:'button',
                                scope: this,
                                tooltip:'Set background color',                             
                                iconCls : 'btn-charttheme',
                                menu : {
                                    xtype : 'colormenu',
                                    listeners : {
                                        select :function(picker,selColor) {

                                            }
                                        }
                                    }
                                });
                        }
                    }
              }
});`

`

Answer 1

I was hoping I could use this solution , but it looks like that only worked in Ext JS 3, unless I was doing something wrong. I started poking around with the editor's textareaEl and came up with a very ugly solution... mainly because they're using an iframe under the hood. Here's my code:

Ext.onReady(function () {
  Ext.application({
    name: 'Fiddle',
    launch: function () {
      Ext.tip.QuickTipManager.init(); // enable tooltips
      var myEditor = Ext.create('Ext.form.field.HtmlEditor', {
        enableColors: false,
        enableAlignments: false,
        listeners: {
          render: onRenderEditor
        }
      });
      function onRenderEditor(editor) {
        this.getToolbar().add({
          xtype: 'button',
          scope: this,
          tooltip: 'Set background color',
          iconCls: 'btn-charttheme',
          menu: {
            xtype: 'colormenu',
            listeners: {
              select: function (picker, selColor) {
                if (editor.iframeEl) {
                /* This is very hacky... we're getting the textareaEl, which
                 * was provided to us, and getting its next sibling, which is
                 * the iframe... and then we're probing the iframe for the
                 * body and changing its background-color to the selected hex */
                  var iframe = editor.iframeEl.dom;
                  if (iframe) {
                    var doc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;
                    if (doc && doc.body && doc.body.style) {
                      doc.body.style['background-color'] = '#' + selColor;
                      /*txtTextarea = Ext.fly(rb).down('textarea');
                       txtTextarea.dom.style.color = 'yellow';
                       txtTextarea.dom.style.cssText += 'background: olive !important';*/
                    }
                  }
                }
              }
            }
          }
        });
      }
      new Ext.panel.Panel({
        title: 'HTML Editor',
        renderTo: Ext.getBody(),
        width: 550,
        height: 250,
        frame: true,
        layout: 'fit',
        items: [myEditor]
      });
    }
  });
});

Like I said, I don't like this solution, but it's a solution... I'd love to hear the proper way... I tried messing around with CSS classes, but didn't produce anything there.

Answer 2

I found another solution to this for posterity. You can use the getEditorBody() method available on the HTMLeditor class to get the preview area, then dynamically style it.

In ExtJS 6:

{
    xtype: 'htmleditor',
    listeners: {
        initialize: 'onEditorInitialize'
    }
}

onEditorInitialize: function (editor) {
    const bodyArea = editor.getEditorBody();
    bodyArea.style.backgroundColor = '#333';
}