//unhighlight, do clicking
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
//update and click
ZoomTracker trk = this.Control as ZoomTracker;
switch (loc)
{
case MouseLoc.ZoomIn: trk.Value++; break;
case MouseLoc.ZoomOut: trk.Value--; break;
default: return;
}
loc = MouseLoc.Out;
tracker_ValueChanged(trk, new ValueChangedEventArgs());
}
//paint the buttons
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (zoom_in != null && zoom_out != null)
{
ZoomTracker trk = this.Control as ZoomTracker;
//zoom out button
if (trk.Value <= trk.Minimum || !Enabled)
{
ControlPaint.DrawImageDisabled(e.Graphics,
zoom_out, 0, 0, SystemColors.Control);
}
else
{
if (loc == MouseLoc.ZoomOut && Control.MouseButtons != MouseButtons.None)
{
ControlPaint.DrawBorder3D(e.Graphics,
new Rectangle(0, 0, 20, this.Height),
Border3DStyle.RaisedInner);
}
e.Graphics.DrawImageUnscaled(zoom_out, Point.Empty);
}
//zoom in button
if (trk.Value >= trk.Maximum || !Enabled)
{
ControlPaint.DrawImageDisabled(e.Graphics,
zoom_in, this.Width - zoom_in.Width, 0, SystemColors.Control);
}
else
{
if (loc == MouseLoc.ZoomIn && Control.MouseButtons != MouseButtons.None)
{
ControlPaint.DrawBorder3D(e.Graphics,
new Rectangle(this.Width - 20, 0, 20, this.Height),
Border3DStyle.RaisedInner);
}
e.Graphics.DrawImageUnscaled(zoom_in, new Point(this.Width - zoom_in.Width, 0));
}
}
//100% zoom line
e.Graphics.DrawLine(Pens.Black, this.Width / 2 - 1, 3 * this.Height / 4,
this.Width / 2 - 1, this.Height - 1);
e.Graphics.DrawLine(Pens.White, this.Width / 2, 3 * this.Height / 4 + 1,
this.Width / 2, this.Height);
}
