DrawHorizontalTrack Method

TrackBarRenderer.DrawHorizontalTrack Method

Note: This method is new in the .NET Framework version 2.0.

Draws the track for a horizontal track bar with visual styles.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public static void DrawHorizontalTrack (
	Graphics g,
	Rectangle bounds
)
public static void DrawHorizontalTrack (
	Graphics g, 
	Rectangle bounds
)
public static function DrawHorizontalTrack (
	g : Graphics, 
	bounds : Rectangle
)

Parameters

g

The Graphics used to draw the track.

bounds

The Rectangle that specifies the bounds of the track.

Exception typeCondition

InvalidOperationException

The operating system does not support visual styles.

-or-

Visual styles are disabled by the user in the operating system.

-or-

Visual styles are not applied to the client area of application windows.

Before calling this method, you should verify that the value of the IsSupported property is true.

The following code example uses the DrawHorizontalTrack method in a custom control's OnPaint method to draw a track bar. This code example is part of a larger example provided for the TrackBarRenderer class.

// Draw the track bar.
protected override void OnPaint(PaintEventArgs e)
{
    if (!TrackBarRenderer.IsSupported)
    {
        this.Parent.Text = "CustomTrackBar Disabled";
        return;
    }

    this.Parent.Text = "CustomTrackBar Enabled";
    TrackBarRenderer.DrawHorizontalTrack(e.Graphics,
        trackRectangle);
    TrackBarRenderer.DrawTopPointingThumb(e.Graphics,
        thumbRectangle, thumbState);
    TrackBarRenderer.DrawHorizontalTicks(e.Graphics,
        ticksRectangle, numberTicks, EdgeStyle.Raised);
}

// Determine whether the user has clicked the track bar thumb.
protected override void OnMouseDown(MouseEventArgs e)
{
    if (!TrackBarRenderer.IsSupported)
        return;

    if (this.thumbRectangle.Contains(e.Location))
    {
        thumbClicked = true;
        thumbState = TrackBarThumbState.Pressed;
    }

    this.Invalidate();
}

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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