from idaapi import PluginForm
from PyQt4 import QtCore, QtGui
import sip

class MyPluginFormClass(PluginForm):
    def OnCreate(self, form):
        """
        Called when the plugin form is created
        """

        # Get parent widget
        self.parent = self.FormToPyQtWidget(form)
        self.PopulateForm()


    def PopulateForm(self):
        # Create layout
        layout = QtGui.QVBoxLayout()

        layout.addWidget(
            QtGui.QLabel("Hello from <font color=red>PyQt</font>"))
        layout.addWidget(
            QtGui.QLabel("Hello from <font color=blue>IDAPython</font>"))

        self.parent.setLayout(layout)


    def OnClose(self, form):
        """
        Called when the plugin form is closed
        """
        pass

plg = MyPluginFormClass()
plg.Show("PyQt hello world")