/// <summary>
/// </summary>
/// <param name="paintParams"></param>
/// <exception cref="ArgumentNullException">
/// <para><paramref name="paintParams"/> is <see langword="null"/>.</para>
/// </exception>
public void DrawTrack(NuGenTrackBarPaintParams paintParams)
{
if (paintParams == null)
{
throw new ArgumentNullException("paintParams");
}
Graphics g = paintParams.Graphics;
Rectangle bounds = paintParams.Bounds;
NuGenControlState state = paintParams.State;
TickStyle tickStyle = paintParams.TickStyle;
INuGenValueTracker valueTracker = paintParams.ValueTracker;
/* Track */
Rectangle valueRect = new Rectangle(
bounds.Left,
bounds.Top,
(int)(NuGenSmoothTrackBarRenderer.GetStep(bounds, valueTracker) * (valueTracker.Value - valueTracker.Minimum)),
bounds.Height
);
if (
valueRect.Width > 0 &&
valueRect.Height > 0
)
{
this.DrawBackground(
g,
valueRect,
state == NuGenControlState.Normal || state == NuGenControlState.Focused ? NuGenControlState.Hot : state
);
}
this.DrawBorder(g, bounds, state);
/* TickLines */
if ((tickStyle & TickStyle.BottomRight) > 0)
{
this.DrawTickLines(
g,
NuGenSmoothTrackBarRenderer.GetTickLinesBounds(bounds, TickStyle.BottomRight),
state,
TickStyle.BottomRight,
valueTracker
);
}
if ((tickStyle & TickStyle.TopLeft) > 0)
{
this.DrawTickLines(
g,
NuGenSmoothTrackBarRenderer.GetTickLinesBounds(bounds, TickStyle.TopLeft),
state,
TickStyle.TopLeft,
valueTracker
);
}
}
/*
* DrawTickLines
*/
private void DrawTickLines(
Graphics g,
Rectangle bounds,
NuGenControlState state,
TickStyle tickStyle,
INuGenValueTracker valueTracker
)
{
Debug.Assert(g != null, "g != null");
Debug.Assert(valueTracker != null, "valueTracker != null");
float step = NuGenSmoothTrackBarRenderer.GetStep(bounds, valueTracker) * valueTracker.SmallChange;
float currentOffset = bounds.Left;
this.DrawLargeTickLine(g, bounds, state, currentOffset, tickStyle);
while ((currentOffset += step) < bounds.Right)
{
this.DrawSmallTickLine(g, bounds, state, currentOffset, tickStyle);
}
this.DrawLargeTickLine(g, bounds, state, bounds.Right, tickStyle);
}
