private bool SelectNextItem(RadioButtonListItem i, bool forward)
{
if (items.Count > 0)
{
var idx = -1;
if (i != null && (idx = BaseItems.IndexOf(i)) == -1)
{
throw new ArgumentOutOfRangeException(nameof(i));
}
idx = GetNextEnabledItemIndex(idx, forward);
if (idx != -1)
{
EnsureVisible(idx);
SetSelected(idx);
return(true);
}
}
return(false);
}
/// <summary>
/// Paints the button.
/// </summary>
/// <param name="g">A <see cref="Graphics" /> reference.</param>
/// <param name="index">The index of the item.</param>
/// <param name="bounds">The bounds in which to paint the item.</param>
protected override void PaintButton(Graphics g, int index, Rectangle bounds)
{
RadioButtonListItem li = BaseItems[index] as RadioButtonListItem;
// Get current state
System.Windows.Forms.VisualStyles.RadioButtonState curState = li.Checked ? System.Windows.Forms.VisualStyles.RadioButtonState.CheckedNormal : System.Windows.Forms.VisualStyles.RadioButtonState.UncheckedNormal;
if (!Enabled || !li.Enabled)
{
curState += 3;
}
else if (index == PressingItem)
{
curState += 2;
}
else if (index == HoverItem)
{
curState++;
}
// Draw glyph
Microsoft.Win32.NativeMethods.BufferedPaint.Paint <RadioButtonState, RadioButtonListItem>(g, this, bounds, PaintAnimatedButton, lastState, curState, GetTransition(curState, lastState), li);
lastState = curState;
}
private void PaintAnimatedButton(Graphics g, Rectangle bounds, RadioButtonState curState, RadioButtonListItem li)
{
Point gp = li.GlyphPosition;
gp.Offset(bounds.Location);
RadioButtonRenderer.DrawRadioButton(g, gp, curState);
}