private void OutlookBar_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.None)
{
// determine over which button the mouse is moving
int index = (e.Location.Y - 1) / (buttonHeight + 1);
if (index >= 0 && index < buttons.Count)
{
if (hoveringButtonIndex == index)
{
return; // nothing changed so we're done, current button stays highlighted
}
// so we need to change the hoveringButtonIndex to the new index
Graphics g = Graphics.FromHwnd(this.Handle);
if (hoveringButtonIndex >= 0)
{
OutlookBarButton b1 = buttons[hoveringButtonIndex];
// un-highlight current hovering button
b1.PaintButton(g, 1, hoveringButtonIndex * (buttonHeight + 1) + 1, b1.Equals(selectedButton), false);
}
// highlight new hovering button
OutlookBarButton b2 = buttons[index];
b2.PaintButton(g, 1, index * (buttonHeight + 1) + 1, b2.Equals(selectedButton), true);
hoveringButtonIndex = index; // set to new index
g.Dispose();
}
else
{
// no hovering button, so un-highlight all.
if (hoveringButtonIndex >= 0)
{
// so we need to change the hoveringButtonIndex to the new index
Graphics g = Graphics.FromHwnd(this.Handle);
OutlookBarButton b1 = buttons[hoveringButtonIndex];
// un-highlight current hovering button
b1.PaintButton(g, 1, hoveringButtonIndex * (buttonHeight + 1) + 1, b1.Equals(selectedButton), false);
hoveringButtonIndex = -1;
g.Dispose();
}
}
}
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
// mouse is leaving control, so unhighlight anything that is highlighted
if (hoveringButtonIndex >= 0)
{
// so we need to change the hoveringButtonIndex to the new index
Graphics g = Graphics.FromHwnd(this.Handle);
OutlookBarButton b1 = buttons[hoveringButtonIndex];
// un-highlight current hovering button
b1.PaintButton(g, 1, hoveringButtonIndex * (buttonHeight + 1) + 1, b1.Equals(selectedButton), false);
hoveringButtonIndex = -1;
g.Dispose();
}
}
