You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.go
    path of file: ./repos/qt/internal/examples/gui/advancedclock
    
    the code of the file until where you have to start completion: //author: https://github.com/omac777

package main

import (
	"fmt"
	"os"

	"github.com/therecipe/qt/core"
	"github.com/therecipe/qt/gui"
	"github.com/therecipe/qt/widgets"
)

type AnalogClockQwdgt struct {
	widgets.QWidget

	_ func() `constructor:"init"`

	_ func() `slot:"renderLater"`
	_ func() `slot:"renderNow"`

	render func(painter *gui.QPainter)

	contextMenu    *widgets.
    
func (w *AnalogClockQwdgt) renderNow(ev *gui.QPaintEvent) {
	fmt.Printf("renderNow()...\n")

	nSide := MyQMin(w.Width(), w.Height())
	myRegionXPos := w.Width()/2 - nSide/2
	myRegionYPos := w.Height()/2 - nSide/2
	var rect = core.NewQRect4(myRegionXPos, myRegionYPos, w.Width(), w.Height())
	qr3 := gui.NewQRegion3(rect, gui.QRegion__Ellipse) //set the ellipse within the qregion

	w.BackingStore().BeginPaint(qr3)
	var device = w.BackingStore().PaintDevice()
	var painter = gui.NewQPainter2(device)
	w.render(painter)
	painter.DestroyQPainter()
	w.BackingStore().EndPaint()
	w.BackingStore().Flush(gui.NewQRegion3(rect, gui.QRegion__Ellipse), nil, core.NewQPoint())
}