/// <summary>
/// 鼠标移动事件
/// </summary>
/// <param name="e"></param>
protected override void OnMouseMove(MouseEventArgs e)
{
_mousePos = e.Location;
JdMenuItem item = GetItem(_mousePos);
if (item == null)
{
base.OnMouseMove(e);
return;
}
if (_HoverItem == null)
{
_HoverItem = item;
Invalidate();
}
else
{
if (item != null && item.Index != _HoverItem.Index)
{
_HoverItem = item;
Invalidate();
}
}
base.OnMouseMove(e);
}
/// <summary>
/// 清空当前列表选择的项
/// </summary>
private void ClearSelectItem()
{
if (_SelectItem != null)
{
this.Invalidate(_SelectItem.Bounds);
_SelectItem = null;
}
}
/// <summary>
/// 绘制菜单项
/// </summary>
protected void DrawItem(Graphics g, JdMenuItem item, Rectangle rect)
{
if (item.Icon != null)
{
g.DrawImage(item.Icon, new Rectangle(rect.X + _IconX, rect.Y + (rect.Height - _IconSize.Height) / 2, _IconSize.Width, _IconSize.Height),
new Rectangle(new Point(), item.Icon.Size), GraphicsUnit.Pixel);
}
Color fontColor = ForeColor;
if (_HoverItem != null && item.Index == _HoverItem.Index)
{
fontColor = _HoverFontColor;
}
if (_SelectItem != null && item.Index == _SelectItem.Index)
{
fontColor = _HoverFontColor;
}
g.DrawString(item.Text, Font, new SolidBrush(fontColor),
new Rectangle(rect.X + 10, rect.Y + (rect.Height - this.Font.Height) / 2, rect.Width, rect.Height), new StringFormat()
{
Alignment = StringAlignment.Center
});
}
/// <summary>
/// 单击事件
/// </summary>
/// <param name="e"></param>
protected override void OnClick(EventArgs e)
{
_SelectItem = GetItem(_mousePos);
Invalidate();
base.OnClick(e);
}
protected override void OnMouseLeave(EventArgs e)
{
_HoverItem = null;
Invalidate();
base.OnMouseLeave(e);
}