/// <summary>
/// Mouse down
/// </summary>
public void HandleMouseDown(object sender, MouseEventArgs e)
{
if (!HasScroll)
{
return;
}
if (e != null && e.Button != MouseButtons.Left)
{
return;
}
var mousePosRelativeToThis = _parent.PointToClient(Cursor.Position);
// mouse in scrollbar
if (BarRect.Contains(mousePosRelativeToThis))
{
var thumbRect = ThumbRect;
if (IsVertical)
{
thumbRect.X -= ThumbPadding;
thumbRect.Width += ThumbPadding * 2;
}
else
{
thumbRect.Y -= ThumbPadding;
thumbRect.Height += ThumbPadding * 2;
}
// mouse in thumb
if (thumbRect.Contains(mousePosRelativeToThis))
{
IsThumbPressed = true;
_mouseMoveInThumbPosition = IsVertical ? mousePosRelativeToThis.Y - thumbRect.Y : mousePosRelativeToThis.X - thumbRect.X;
}
else
{
// hover button up
if (ScrollButtonUp.Contains(mousePosRelativeToThis))
{
IsButtonUpPressed = true;
Value -= SmallChange;
}
else
{
// hover button down
if (ScrollButtonDown.Contains(mousePosRelativeToThis))
{
IsButtonDownPressed = true;
Value += SmallChange;
}
else
{
// scroll to click position
MoveThumb(IsVertical ? mousePosRelativeToThis.Y : mousePosRelativeToThis.X);
}
}
}
}
}
/// <summary>
/// Mouse move
/// </summary>
public void HandleMouseMove(object sender, MouseEventArgs e)
{
if (!HasScroll)
{
return;
}
// hover bar
var mousePosRelativeToThis = _parent.PointToClient(Cursor.Position);
if (BarRect.Contains(mousePosRelativeToThis))
{
IsHovered = true;
// hover thumb
if (ThumbRect.Contains(mousePosRelativeToThis))
{
IsThumbHovered = true;
}
else
{
IsThumbHovered = false;
// hover button up
if (ScrollButtonUp.Contains(mousePosRelativeToThis))
{
IsButtonUpHovered = true;
}
else
{
IsButtonUpHovered = false;
// hover button down
if (ScrollButtonDown.Contains(mousePosRelativeToThis))
{
IsButtonDownHovered = true;
}
else
{
IsButtonDownHovered = false;
}
}
}
}
else
{
IsHovered = false;
IsThumbHovered = false;
IsButtonUpHovered = false;
IsButtonDownHovered = false;
}
// move thumb
if (IsThumbPressed)
{
MoveThumb(IsVertical ? mousePosRelativeToThis.Y - _mouseMoveInThumbPosition : mousePosRelativeToThis.X - _mouseMoveInThumbPosition);
}
}