protected virtual void OnBackColorChanged()
{
TextureValid = false;
if (BackColorChanged != null)
{
BackColorChanged.Invoke(this, EventArgs.Empty);
}
}
private void UpdateSelection(byte idx)
{
if (PalSource == null) return;
if (ModifierKeys == Keys.Alt)
{
BackColor = PalSource[idx];
BackColorChanged?.Invoke(this, new EventArgs());
return;
}
if (!IsSelectable) return;
if (IsMultiSelect)
{
switch (ModifierKeys)
{
case Keys.Control:
if (Selections.Contains(idx)) Selections.Remove(idx);
else Selections.Add(idx);
break;
case Keys.Shift:
if (Selections.Count == 0)
{
Selections.Add(idx);
break;
}
if (Selections.Last() == idx)
{
Selections.Remove(idx);
}
else
{
if (Selections.Last() < idx)
{
for (int i = Selections.Last() + 1; i <= idx; i++)
if (!Selections.Contains((byte)i)) Selections.Add((byte)i);
}
else
{
for (int i = Selections.Last() - 1; i >= idx; i--)
if (!Selections.Contains((byte)i)) Selections.Add((byte)i);
}
}
break;
default:
Selections.Clear();
Selections.Add(idx);
break;
}
}
else
{
Selections.Clear();
Selections.Add(idx);
}
if (PalSource != null)
SelectedIndexChanged?.Invoke(this, new EventArgs());
if (IsSelectVisible) Refresh();
}
protected internal virtual void OnBackColorChanged(EventArgs e)
{
BackColorChanged?.Invoke(this, e);
}