Displaying rows of components inside a panel - Ext JS - layout

Question

I have a panel with an hbox layout and a single line of components in it: A combobox and text field. What I am trying to do is replicate that exact same line of components beneath the existing components. How can you break a line inside of an hbox layout in Ext JS? (Similar to in HTML).
Here's my code:
{ xtype: 'panel', padding: '5 5 5 5', layout: 'hbox', height: 170, width: '100%', id: 'main', collapsible: true,
//Query Builder
items: [
{ xtype: 'combobox', padding: 5, store: filters, id: 'criteria_1_drop_down', displayField: 'field1' },
{ xtype: 'textfield', padding: 5, id: 'criteria_1_input'}
//code to start new line...
Here's what I'm trying to achieve:
Line 1 will be just text, sort of like a column header
Line 2 is the code I have now
Line 3 will be just like line 2
Oh and there's a button :)

Answer 1

I would use an anchor layout for the panel, with a container having an hbox layout for each row.
{
xtype: 'panel',
layout: 'anchor',
items: [{
xtype: 'container',
layout: 'hbox',
items: [{
xtype: 'component',
html: 'Text Field'
}, {
xtype: 'component',
html: 'Text Field'
}]
}, {
xtype: 'container',
layout: 'hbox',
items: [{
xtype: 'combo',
...
}, {
xtype: 'textfield',
...
}]
}, {
xtype: 'container',
layout: 'hbox',
items: [{
xtype: 'combo',
...
}, {
xtype: 'textfield',
...
}, {
xtype: 'button',
...
}]
}]
}