/// <summary>
/// 清空当前列表选择的项
/// </summary>
private void ClearSelectItem()
{
if (_SelectItem != null)
{
this.Invalidate(new Rectangle(
_SelectItem.Bounds.X, _SelectItem.Bounds.Y - vscroll.Value,
_SelectItem.Bounds.Width, _SelectItem.Bounds.Height));
_SelectItem = null;
}
}
/// <summary>
/// 绘制列表项
/// </summary>
/// <author>jaly</author>
/// <date>2015-09-23 09:28:43</date>
/// <param name="g">绘图表面</param>
/// <param name="item">要绘制的列表项</param>
/// <param name="rect"></param>
/// <returns></returns>
protected virtual void DrawItem(Graphics g, JIconListViewItem item, Rectangle rect)
{
//g.DrawRectangle(Pens.Azure, rect);
if (item.Icon != null)
{
g.DrawImage(item.Icon, new Rectangle(rect.X + ((_ItemSize.Width - _IconSize.Width) / 2), rect.Y, _IconSize.Width, _IconSize.Height), new Rectangle(new Point(), item.Icon.Size), GraphicsUnit.Pixel);
}
var fr = rect;
fr.Y += _IconSize.Height + 4;
g.DrawString(item.Text, Font, new SolidBrush(ForeColor), fr, stringformat);
//TextFormatFlags format = TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter;
//if (RightToLeft == RightToLeft.Yes)
//{
// format |= TextFormatFlags.RightToLeft | TextFormatFlags.Right;
//}
//TextRenderer.DrawText(g, item.Text, Font, rect, ForeColor, format);
}
protected override void OnClick(EventArgs e)
{
if (vscroll.IsMouseDown)
{
return; //MouseUp事件触发在Click后 滚动条滑块为点下状态 单击无效
}
if (vscroll.ShouldBeDraw)
{ //如果有滚动条 判断是否在滚动条类点击
if (vscroll.Bounds.Contains(m_ptMousePos))
{ //判断在滚动条那个位置点击
if (vscroll.UpBounds.Contains(m_ptMousePos))
{
vscroll.Value -= 50;
}
else if (vscroll.DownBounds.Contains(m_ptMousePos))
{
vscroll.Value += 50;
}
else if (!vscroll.SliderBounds.Contains(m_ptMousePos))
{
vscroll.MoveSliderToLocation(m_ptMousePos.Y);
}
return;
}
} //否则 如果在列表上点击 展开或者关闭 在子项上面点击则选中
ClearSelectItem();
foreach (JIconListViewItem item in _Items)
{
if (item.Bounds.Contains(m_ptMousePos))
{
_SelectItem = item;
Invalidate();
}
}
base.OnClick(e);
}
public JIconListViewEventArgs(JIconListViewItem selectitem)
{
_selectItem = selectitem;
}
public void AddItem(JIconListViewItem item)
{
_Items.Add(item);
}
