vb.net - Smooth Curves when drawing ellipse -


i trying paint picture box circle , code:

private withevents pparent thumbcontrol     sub new(byval pnparent thumbcontrol, byval path string, optional byval datastring string = "")         pparent = pnparent         strpath = path         strdata = datastring         me.sizemode = windows.forms.pictureboxsizemode.stretchimage         me.size = new size(100, 100)          dim gp new system.drawing.drawing2d.graphicspath()         gp.addellipse(0, 0, me.width - 3, me.height - 3)         dim rg new region(gp)          me.region = rg end sub

paint method:

protected overrides sub onpaint(byval pe system.windows.forms.painteventargs)     mybase.onpaint(pe)     if not bselected         if pparent.highlightmode = ihighlitemode.glassandforeground             if bover                 dim rc new rectangle(0, 0, 100, 100)                 dim rc1 new rectangle(0, 0, 100, 50)                 pe.graphics.fillellipse(new solidbrush(color.fromargb(100, pparent.highlight.r, pparent.highlight.g, pparent.highlight.b)), rc)                 dim br new system.drawing.drawing2d.lineargradientbrush(rc1, color.fromargb(180, 255, 255, 255), color.fromargb(80, 255, 255, 255), drawing2d.smoothingmode.antialias)                 pe.graphics.fillellipse(br, rc1)             end if          elseif pparent.highlightmode = ihighlitemode.backgroundonly             if bover                 dim rc1 new rectangle(-2, -2, 100, 100)                 dim br new system.drawing.drawing2d.lineargradientbrush(rc1, color.fromargb(180, 255, 255, 255), color.fromargb(80, 255, 255, 255), drawing2d.smoothingmode.antialias)                 pe.graphics.fillellipse(br, rc1)             end if         elseif pparent.highlightmode = ihighlitemode.glassonly             if bover                 dim rc1 new rectangle(0, 0, 100, 100)                 dim br new system.drawing.drawing2d.lineargradientbrush(rc1, color.fromargb(180, 255, 255, 255), color.fromargb(80, 255, 255, 255), drawing2d.smoothingmode.antialias)                 pe.graphics.fillellipse(br, rc1)             end if         elseif pparent.highlightmode = ihighlitemode.glassandbackground             if bover                 dim rc1 new rectangle(0, 0, 100, 100)                 dim br new system.drawing.drawing2d.lineargradientbrush(rc1, color.fromargb(180, 255, 255, 255), color.fromargb(80, 255, 255, 255), drawing2d.smoothingmode.antialias)                 pe.graphics.fillellipse(br, rc1)             end if         end if         'dim irc1 new rectangle(0, 0, 90, 100)         'pe.graphics.drawellipse(new pen(pparent.selectedcolor, 1), irc1)     end if      'if bselected     '    dim irc new rectangle(0, 0, 90, 90)     '    pe.graphics.drawellipse(new pen(pparent.selectedcolor, 2), irc)     'end if end sub  protected overrides sub onpaintbackground(byval pevent system.windows.forms.painteventargs)     mybase.onpaintbackground(pevent)     if not bselected         if pparent.highlightmode = ihighlitemode.glassandbackground             if bover                 'dim rc new rectangle(0, 0, 180, 150)                 'dim rc1 new rectangle(0, 0, 100, 80)                 'pevent.graphics.fillellipse(new solidbrush(color.fromargb(100, pparent.highlight.r, pparent.highlight.g, pparent.highlight.b)), rc)                 'dim br new system.drawing.drawing2d.lineargradientbrush(rc1, color.fromargb(180, 255, 255, 255), color.fromargb(80, 255, 255, 255), drawing2d.lineargradientmode.vertical)                 'pevent.graphics.fillrectangle(br, rc1)             end if         elseif pparent.highlightmode = ihighlitemode.backgroundonly             if bover                 dim rc new rectangle(0, 0, 90, 100)                 dim rc1 new rectangle(0, 0, 100, 80)                 pevent.graphics.fillellipse(new solidbrush(color.fromargb(100, pparent.highlight.r, pparent.highlight.g, pparent.highlight.b)), rc)                 dim br new system.drawing.drawing2d.lineargradientbrush(rc1, color.fromargb(180, 255, 255, 255), color.fromargb(80, 255, 255, 255), drawing2d.smoothingmode.antialias)              end if         end if     end if end sub

i'm getting non-smoothed curve shown below:

enter image description here

how smooth rounded curve

before draw ellipse, set smoothingmode, e.g. 

dim grp graphics = picturebox1.creategraphics grp.smoothingmode = drawing2d.smoothingmode.antialias grp.fillellipse(brushes.blue, new rectangle(0, 0, 100, 100))

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