/*
* OnPaint
*/
/// <summary>
/// Raises the <see cref="E:System.Windows.Forms.Control.Paint"></see> event.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.PaintEventArgs"></see> that contains the event data.</param>
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
if (this.Orientation == NuGenOrientationStyle.Vertical)
{
NuGenControlPaint.Make90CCWGraphics(g, this.ClientRectangle);
}
NuGenTrackBarPaintParams paintParams = new NuGenTrackBarPaintParams(
this,
g,
this.AgnosticTrackBounds,
this.StateTracker.GetControlState(),
this.ValueTracker,
this.TickStyle
);
this.Renderer.DrawTrack(paintParams);
if (_focused && this.ShowFocusCues)
{
ControlPaint.DrawFocusRectangle(e.Graphics, this.ClientRectangle);
}
}
/// <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
);
}
}
