/// <summary>
/// Create a new ExtendedScrollBar.
/// </summary>
public ExtendedScrollBar()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
this.hScrollBar.SmallChange = 10;
this.hScrollBar.LargeChange = 100;
this.scrollAmount = this.hScrollBar.SmallChange;
this.autoscrollTimer.Interval = 100;
this.buttonMode = ExtendedScrollBarButtonMode.PlaySymbols;
// create left play symbol
this.leftPlayRegion = new Region();
this.leftPlayRegion.MakeEmpty();
this.leftPlayRegion.Union(new Rectangle(1, 4, 1, 1));
this.leftPlayRegion.Union(new Rectangle(2, 3, 1, 3));
this.leftPlayRegion.Union(new Rectangle(3, 2, 1, 5));
this.leftPlayRegion.Union(new Rectangle(4, 1, 1, 7));
this.leftPlayRegion.Union(new Rectangle(5, 0, 2, 9));
// create right play symbol
this.rightPlayRegion = this.leftPlayRegion.Clone();
System.Drawing.Drawing2D.Matrix matrixTransform = new System.Drawing.Drawing2D.Matrix();
matrixTransform.RotateAt(45, new Point(4, 4));
matrixTransform.RotateAt(45, new Point(5, 5));
matrixTransform.RotateAt(45, new Point(4, 4));
matrixTransform.RotateAt(45, new Point(4, 4));
this.rightPlayRegion.Transform(matrixTransform);
// create stop symbol
this.stopRegion = new Region();
this.stopRegion.MakeEmpty();
this.stopRegion.Union(new Rectangle(1, 0, 1, 1));
this.stopRegion.Union(new Rectangle(7, 0, 1, 1));
this.stopRegion.Union(new Rectangle(0, 1, 3, 1));
this.stopRegion.Union(new Rectangle(6, 1, 3, 1));
this.stopRegion.Union(new Rectangle(1, 2, 3, 1));
this.stopRegion.Union(new Rectangle(5, 2, 3, 1));
this.stopRegion.Union(new Rectangle(2, 3, 5, 1));
this.stopRegion.Union(new Rectangle(3, 4, 3, 1));
this.stopRegion.Union(new Rectangle(2, 5, 5, 1));
this.stopRegion.Union(new Rectangle(5, 6, 3, 1));
this.stopRegion.Union(new Rectangle(1, 6, 3, 1));
this.stopRegion.Union(new Rectangle(6, 7, 3, 1));
this.stopRegion.Union(new Rectangle(0, 7, 3, 1));
this.stopRegion.Union(new Rectangle(7, 8, 1, 1));
this.stopRegion.Union(new Rectangle(1, 8, 1, 1));
this.CreateBitmaps();
}
/// <summary>
/// Handle the button click events of the two autoscroll buttons, and set timers and images appropriately.
/// </summary>
private void MovieButtonsClicked()
{
if (this.buttonMode == ExtendedScrollBarButtonMode.PlaySymbols)
{
this.leftPictureBox.Image = stopImageList.Images[0];
this.rightPictureBox.Image = stopImageList.Images[4];
this.buttonMode = ExtendedScrollBarButtonMode.StopSymbols;
// start the auto-scroll timer
this.autoscrollTimer.Start();
}
else
{
this.leftPictureBox.Image = playImageList.Images[0];
this.rightPictureBox.Image = playImageList.Images[4];
this.buttonMode = ExtendedScrollBarButtonMode.PlaySymbols;
// stop the auto-scroll timer if it is still active
if (this.autoscrollTimer.Enabled)
{
this.autoscrollTimer.Stop();
}
}
}
