protected virtual void OnDrawTicks(IntPtr hdc)
{
Graphics graphics = Graphics.FromHdc(hdc);
if (((this.OwnerDrawParts & TrackBarOwnerDrawParts.Ticks) == TrackBarOwnerDrawParts.Ticks) && !this.DesignMode)
{
Rectangle bounds;
Rectangle rectangle2;
if (this.Orientation == Orientation.Horizontal)
{
rectangle2 = new Rectangle(this.ChannelBounds.Left + (this.ThumbBounds.Width / 2), this.ThumbBounds.Top - 6, this.ChannelBounds.Width - this.ThumbBounds.Width, this.ThumbBounds.Height + 10);
bounds = rectangle2;
}
else
{
rectangle2 = new Rectangle(this.ThumbBounds.Left - (this.ThumbBounds.Height / 2), this.ChannelBounds.Top + 6, this.ThumbBounds.Width + 10, this.ChannelBounds.Height - this.ThumbBounds.Height);
bounds = rectangle2;
}
TrackBarDrawItemEventArgs e = new TrackBarDrawItemEventArgs(graphics, bounds, (TrackBarItemState)this.ThumbState);
if (this.DrawTicks != null)
{
this.DrawTicks(this, e);
}
}
else
{
if (this.TickStyle == TickStyle.None)
{
return;
}
if (this.ThumbBounds.Equals(Rectangle.Empty))
{
return;
}
Color black = Color.Black;
if (VisualStylesEnabled)
{
IntPtr hTheme = NativeMethods.OpenThemeData(this.Handle, "TRACKBAR");
if (!hTheme.Equals(IntPtr.Zero))
{
int pColor = 0;
if (NativeMethods.GetThemeColor(hTheme, 9, this.ThumbState, 0xcc, ref pColor) == 0)
{
black = ColorTranslator.FromWin32(pColor);
}
NativeMethods.CloseThemeData(hTheme);
}
}
if (this.Orientation == Orientation.Horizontal)
{
this.DrawHorizontalTicks(graphics, black);
}
else
{
this.DrawVerticalTicks(graphics, black);
}
}
graphics.Dispose();
}
protected virtual void OnDrawChannel(IntPtr hdc)
{
Graphics graphics = Graphics.FromHdc(hdc);
if (((this.OwnerDrawParts & TrackBarOwnerDrawParts.Channel) == TrackBarOwnerDrawParts.Channel) && !this.DesignMode)
{
TrackBarDrawItemEventArgs e = new TrackBarDrawItemEventArgs(graphics, this.ChannelBounds, (TrackBarItemState)this.ThumbState);
if (this.DrawChannel != null)
{
this.DrawChannel(this, e);
}
}
else
{
if (this.ChannelBounds.Equals(Rectangle.Empty))
{
return;
}
if (VisualStylesEnabled)
{
IntPtr hTheme = NativeMethods.OpenThemeData(this.Handle, "TRACKBAR");
if (!hTheme.Equals(IntPtr.Zero))
{
NativeMethods.RECT pRect = new NativeMethods.RECT(this.ChannelBounds);
bool flag = NativeMethods.DrawThemeBackground(hTheme, hdc, 1, 1, ref pRect, ref pRect) == 0;
NativeMethods.CloseThemeData(hTheme);
if (flag)
{
return;
}
}
}
ControlPaint.DrawBorder3D(graphics, this.ChannelBounds, Border3DStyle.Sunken);
}
graphics.Dispose();
}
protected virtual void OnDrawThumb(IntPtr hdc)
{
Graphics graphics = Graphics.FromHdc(hdc);
graphics.Clip = new Region(this.ThumbBounds);
if (((this.OwnerDrawParts & TrackBarOwnerDrawParts.Thumb) == TrackBarOwnerDrawParts.Thumb) && !this.DesignMode)
{
TrackBarDrawItemEventArgs e = new TrackBarDrawItemEventArgs(graphics, this.ThumbBounds, (TrackBarItemState)this.ThumbState);
if (this.DrawThumb != null)
{
this.DrawThumb(this, e);
}
}
else
{
int iPartId = 0;
if (this.ThumbBounds.Equals(Rectangle.Empty))
{
return;
}
switch (this.TickStyle)
{
case TickStyle.None:
case TickStyle.BottomRight:
if (this.Orientation != Orientation.Horizontal)
{
iPartId = 8;
break;
}
iPartId = 4;
break;
case TickStyle.TopLeft:
if (this.Orientation != Orientation.Horizontal)
{
iPartId = 7;
break;
}
iPartId = 5;
break;
case TickStyle.Both:
if (this.Orientation != Orientation.Horizontal)
{
iPartId = 6;
break;
}
iPartId = 3;
break;
}
if (VisualStylesEnabled)
{
IntPtr hTheme = NativeMethods.OpenThemeData(this.Handle, "TRACKBAR");
if (!hTheme.Equals(IntPtr.Zero))
{
NativeMethods.RECT pRect = new NativeMethods.RECT(this.ThumbBounds);
bool flag = NativeMethods.DrawThemeBackground(hTheme, hdc, iPartId, this.ThumbState, ref pRect, ref pRect) == 0;
NativeMethods.CloseThemeData(hTheme);
if (flag)
{
graphics.ResetClip();
graphics.Dispose();
return;
}
}
}
switch (iPartId)
{
case 4:
this.DrawPointerDown(graphics);
goto Label_01AD;
case 5:
this.DrawPointerUp(graphics);
goto Label_01AD;
case 7:
this.DrawPointerLeft(graphics);
goto Label_01AD;
case 8:
this.DrawPointerRight(graphics);
goto Label_01AD;
}
if ((this.ThumbState == 3) || !this.Enabled)
{
ControlPaint.DrawButton(graphics, this.ThumbBounds, ButtonState.All);
}
else
{
graphics.FillRectangle(SystemBrushes.Control, this.ThumbBounds);
}
ControlPaint.DrawBorder3D(graphics, this.ThumbBounds, Border3DStyle.Raised);
}
Label_01AD:
graphics.ResetClip();
graphics.Dispose();
}
