CustomAction With Dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <CustomAction Id="dc08391a-82b7-44c6-b81b-5a093da0c978.RibbonCustomAction1"
                RegistrationType="List"
                RegistrationId="101"
                Location="CommandUI.Ribbon"
                Sequence="10001"
                HostWebDialog="true"
                HostWebDialogHeight="500"
                HostWebDialogWidth="1000">
		<UrlAction Url=""/>
    <CommandUIExtension>
      <!-- 
      Update the UI definitions below with the controls and the command actions
      that you want to enable for the custom action.
      -->
      <CommandUIDefinitions>
        <CommandUIDefinition Location="Ribbon.Documents.New.Controls._children">
          <Button Id="Ribbon.Documents.New.Controls.TemplateSelectorButton"
                  Alt="Select template"
                  Sequence="13"
                  Command="ShowSelectorCommand"
                  LabelText="New from Template"
                  TemplateAlias="o1"
                  Image32by32="_layouts/1033/Images/formatmap16x16.png"
                  Image16by16="_layouts/1033/Images/formatmap32x32.png" />
        </CommandUIDefinition>
      </CommandUIDefinitions>
      <CommandUIHandlers>
        <CommandUIHandler Command="ShowSelectorCommand"
                          CommandAction="~appWebUrl/Pages/Selector.html?{StandardTokens}&amp;SPListItemId={SelectedItemId}&amp;SPListId={SelectedListId}&amp;DisplayType=iframe" />
      </CommandUIHandlers>
    </CommandUIExtension >
  </CustomAction>
</Elements>