public Rectangle GetItemBounds(TimelineListItem item)
{
int bound_left = 0;
int bound_width = Width;
if (m_Scrollbar.Visible)
{
bound_left = m_Scrollbar.Width;
bound_width = Width - m_Scrollbar.Width;
}
for (int i = 0; i < m_VisibleItems.Count; ++i)
{
if (m_VisibleItems[i] != item)
{
continue;
}
Rectangle itemBounds = new Rectangle();
itemBounds.X = bound_left;
itemBounds.Y = i * m_ItemHeight;
itemBounds.Width = bound_width - 1;
itemBounds.Height = m_ItemHeight;
return(itemBounds);
}
return(new Rectangle(0, 0, 0, 0));
}
//----------------------------------------------------------------------------------------
public void ShowItem(TimelineStreams item)
{
for (int i = 0; i < item.GetStreamCount(); ++i)
{
TimelineListItem li = new TimelineListItem();
li.Streams = item;
li.StreamIndex = i;
m_Items.Add(li);
}
int visible_count = Height / m_ItemHeight;
if (visible_count < m_Items.Count)
{
m_Scrollbar.Enabled = true;
m_Scrollbar.Minimum = 0;
m_Scrollbar.Maximum = m_Items.Count - visible_count - 1;
m_Scrollbar.Visible = true;
m_Scrollbar.Maximum = m_Scrollbar.Maximum + m_Scrollbar.LargeChange;
}
else
{
m_Scrollbar.Enabled = false;
m_Scrollbar.Visible = false;
}
UpdateVisibleList();
}
public void Clear()
{
m_Items.Clear();
m_Scrollbar.Enabled = false;
m_Scrollbar.Visible = false;
m_VisibleItems.Clear();
m_SelectedItem = null;
Invalidate();
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
TimelineListItem item = GetItemInPosition(e.X, e.Y);
if (item != null)
{
Rectangle itemBound = GetItemBounds(item);
//如果是按在色彩方块中，则修改相应的色彩方块，否则选中当前项目
Rectangle rect = new Rectangle(itemBound.Right - 20, itemBound.Top + (m_ItemHeight - 10) / 2, 10, 10);
if (rect.Contains(e.X, e.Y))
{
item.Streams.SetStreamEnable(item.StreamIndex, !item.Streams.GetStreamEnable(item.StreamIndex));
Invalidate(itemBound);
return;
}
m_SelectedItem = item;
}
else
{
m_SelectedItem = null;
}
Invalidate();
}