How to render something above Ext.Viewport

Question

I have viewport:

new Ext.Viewport({
  layout:'fit',
  hideBorders:true,
  items:[panel1,panel2,panel3],
});

Now i want to show combobox above viewport:

var myCombo= new Ext.ComboBox({
  store:myStore,
  editable:false,
  renderTo:Ext.getBody(),
  triggerActions:'all',
  mode:'local',
  cls:'scales'
});

css:

.scales{
  position:absolute,
  botton:1em,
  right:1em,
  background-color:white
}

But its render in leftside. How to render its in right botton?

UPDATE

Now i put combo into Panle:

myPanel= new Ext.Panle({
items[myCombo],
renderTo:Ext.getBody(),
cls:'scales',
border:false
});

Now my combo in right-bottom. But look like this:

Even i delete viewport code from app i get same result. can i do something with combo?

Answer 1

You CSS is broken, that should be:

.scales{
    position: absolute; 
    bottom: 1em;
    right: 1em;
    background-color: white;
}

Notice the semicolons and bottom instead of botton.

EDIT:

You should render your combo into a window to let Ext manage positioning problematic. Here's an example that renders a minimalist window:

var win = new Ext.Window({
    closable: false
    ,resizable: false
    // uncomment to make the window draggable
    //,title: '...'
    ,border: false
    // uncomment to make the window modal
    //,modal: true
    ,items: [{
        xtype: 'combo'
        ,store: ['Foo', 'Bar', 'Baz']
    }]
});

win.show();

// then use anchorTo to position the window where you want:
win.anchorTo(Ext.getBody(), 'br-br', [10, 10]);

See the doc for anchorTo.