/// <summary>
/// Raises the Click event with the specified color
/// </summary>
/// <param name="color">Color to pass to Click event handlers</param>
protected void RaiseClickEvent(Color color)
{
if (Click != null)
{
ColorPickerEventArgs args = new ColorPickerEventArgs();
args.Value = color;
Click(this, args);
}
}
/// <summary>
/// Updates the selected palette item.
/// </summary>
/// <param name="index">New palette index</param>
/// <param name="scrollIntoView">Control will be scrolled so
/// that new item is fully visible when true</param>
protected void SetSelected(int index, bool scrollIntoView)
{
// Something to do only if item has changed
if (index != _selected)
{
// Get update region
if (_selected >= 0)
{
Invalidate(IndexToRectangle(_selected));
}
if (index >= 0)
{
Rectangle rect = IndexToRectangle(index);
Invalidate(rect);
// Scroll if needed
if (_autoScroll && scrollIntoView)
{
if (rect.Top < 0)
{
// Scroll up
Point point = new Point(0, -AutoScrollPosition.Y);
point.Y += (rect.Top - Margins);
AutoScrollPosition = point;
}
else if (rect.Bottom >= ClientRectangle.Bottom)
{
// Scroll down
Point point = new Point(0, -AutoScrollPosition.Y);
point.Y += ((rect.Bottom - ClientRectangle.Bottom) + Margins);
AutoScrollPosition = point;
}
}
}
// Update selected index
_selected = index;
// Raise SelectionChanged event
if (SelectionChanged != null && _selected >= 0)
{
ColorPickerEventArgs args = new ColorPickerEventArgs();
args.Value = ColorItems[_selected];
SelectionChanged(this, args);
}
}
}