/// <summary>
/// 绘制列表子项
/// </summary>
/// <param name="g">绘图表面</param>
/// <param name="subItem">要绘制的子项</param>
/// <param name="rectSubItem">该子项的区域</param>
/// <param name="sb">画刷</param>
protected virtual void DrawSongItem(Graphics g, SongItem subItem, ref Rectangle rectSubItem, SolidBrush sb)
{
if (subItem.Equals(selectSubItem)) //判断改子项是否被选中
{
rectSubItem.Height = 55; //如果选中则绘制成大图标
sb.Color = this.subItemSelectColor;
g.FillRectangle(sb, rectSubItem);
//DrawHeadImage(g, subItem, rectSubItem); //绘制头像
DrawPlayingSongItemm(g, subItem, rectSubItem); //绘制大图标 显示的个人信息
subItem.Bounds = new Rectangle(rectSubItem.Location, rectSubItem.Size);
return;
}
else if (subItem.Equals(MouseOnSongItem))
{
sb.Color = this.subItemMouseOnColor;
}
else
{
sb.Color = this.subItemColor;
}
g.FillRectangle(sb, rectSubItem);
//DrawHeadImage(g, subItem, rectSubItem);
//if (iconSizeMode == IconSize.Large) //没有选中则根据 图标模式绘制
// DrawPlayingSongItemm(g, subItem, rectSubItem);
//else
DrawNormalSongItem(g, subItem, rectSubItem);
subItem.Bounds = new Rectangle(rectSubItem.Location, rectSubItem.Size);
}
//实现排序接口
int IComparable.CompareTo(object obj)
{
if (!(obj is SongItem))
throw new NotImplementedException("obj is not ChatListSubItem");
SongItem subItem = obj as SongItem;
return (this.songname).CompareTo(subItem.songname);
}
/// <summary>
/// 移除一个子项
/// </summary>
/// <param name="subItem">要移除的子项</param>
public void Remove(SongItem subItem)
{
int index = this.IndexOf(subItem);
if (-1 != index)
{
this.RemoveAt(index);
}
}
private void ClearSubItemMouseOn()
{
if (MouseOnSongItem != null)
{
this.Invalidate(new Rectangle(
MouseOnSongItem.Bounds.X, MouseOnSongItem.Bounds.Y - VScroll.Value,
MouseOnSongItem.Bounds.Width, MouseOnSongItem.Bounds.Height));
MouseOnSongItem = null;
}
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture,
object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("DestinationType cannot be null");
}
//MessageBox.Show("Convertto OK");
if (destinationType == typeof(InstanceDescriptor) && (value is PlayList))
{
ConstructorInfo constructor = null;
PlayList item = (PlayList)value;
SongItem[] subItems = null;
//MessageBox.Show("Convertto Start Item:" + item.Text);
//MessageBox.Show("Item.SubItems.Count:" + item.SubItems.Count);
if (item.SubItems.Count > 0)
{
subItems = new SongItem[item.SubItems.Count];
item.SubItems.CopyTo(subItems, 0);
}
//MessageBox.Show("Item.SubItems.Count:" + item.SubItems.Count);
if (item.Text != null && subItems != null)
{
constructor = typeof(PlayList).GetConstructor(new Type[] { typeof(string), typeof(SongItem[]) });
}
//MessageBox.Show("Constructor(Text,item[]):" + (constructor != null));
if (constructor != null)
{
return(new InstanceDescriptor(constructor, new object[] { item.Text, subItems }, false));
}
if (subItems != null)
{
constructor = typeof(PlayList).GetConstructor(new Type[] { typeof(SongItem[]) });
}
if (constructor != null)
{
return(new InstanceDescriptor(constructor, new object[] { subItems }, false));
}
if (item.Text != null)
{
//MessageBox.Show("StartGetConstructor(text)");
constructor = typeof(PlayList).GetConstructor(new Type[] { typeof(string), typeof(bool) });
}
//MessageBox.Show("Constructor(Text):" + (constructor != null));
if (constructor != null)
{
//System.Windows.Forms.MessageBox.Show("text OK");
return(new InstanceDescriptor(constructor, new object[] { item.Text, item.IsOpen }));
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
//确认存储空间
private void EnsureSpace(int elements)
{
if (m_arrSubItems == null)
{
m_arrSubItems = new SongItem[Math.Max(elements, 4)];
}
else if (elements + this.count > m_arrSubItems.Length)
{
SongItem[] arrTemp = new SongItem[Math.Max(m_arrSubItems.Length * 2, elements + this.count)];
m_arrSubItems.CopyTo(arrTemp, 0);
m_arrSubItems = arrTemp;
}
}
/// <summary>
/// 添加一个子项
/// </summary>
/// <param name="subItem">要添加的子项</param>
public void Add(SongItem subItem)
{
if (subItem == null)
{
throw new ArgumentNullException("SubItem cannot be null");
}
this.EnsureSpace(1);
if (-1 == IndexOf(subItem))
{
subItem.OwnerListItem = owner;
m_arrSubItems[this.count++] = subItem;
if (this.owner.OwnerPlayListBox != null)
{
this.owner.OwnerPlayListBox.Invalidate();
}
}
}
/// <summary>
/// 绘制正常列表项
/// </summary>
/// <param name="g">绘图表面</param>
/// <param name="songitem">要绘制信息的子项</param>
/// <param name="rectSubItem">该子项的区域</param>
protected virtual void DrawNormalSongItem(Graphics g, SongItem songitem, Rectangle rectSubItem)
{
rectSubItem.Height = 30; //重新赋值一个高度
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
//sf.Alignment = StringAlignment.Center;
sf.FormatFlags = StringFormatFlags.NoWrap;
string strDraw = songitem.SongName;
Size szFont = TextRenderer.MeasureText(strDraw, this.Font);
sf.SetTabStops(0.0F, new float[] { rectSubItem.Height });
g.DrawString("\t" + strDraw, this.Font, Brushes.Black, rectSubItem, sf);
sf.SetTabStops(0.0F, new float[] { rectSubItem.Height + 5 + szFont.Width });
sf.Alignment = StringAlignment.Far;
g.DrawString(string.Format("\t{0:D2}:{1:D2}", +songitem.TotalTime / 60, songitem.TotalTime % 60), this.Font, Brushes.Gray, rectSubItem, sf);
}
/// <summary>
/// 绘制正在播放的列表项
/// </summary>
/// <param name="g">绘图表面</param>
/// <param name="songitem">要绘制信息的子项</param>
/// <param name="rectSubItem">该子项的区域</param>
protected virtual void DrawPlayingSongItemm(Graphics g, SongItem songitem, Rectangle rectSubItem)
{
g.FillRectangle(new SolidBrush(Color.FromArgb(101, 192, 244)), rectSubItem);
rectSubItem.Height = 55; //重新赋值一个高度
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Near;
sf.LineAlignment = StringAlignment.Center;
sf.SetTabStops(0.0f, new float[] { 2.0f + rectSubItem.Height + 10 });
Rectangle rectContent = new Rectangle(rectSubItem.X, rectSubItem.Y, rectSubItem.Width, rectSubItem.Height / 2);
g.DrawString("\t" + songitem.SongName, this.Font, new SolidBrush(Color.White), rectContent, sf);
rectContent.Y += rectSubItem.Height / 2;
g.DrawString(string.Format("\t{0:D2}:{1:D2}", songitem.TotalTime / 60, songitem.TotalTime % 60), this.Font, new SolidBrush(Color.White), rectContent, sf);
//g.DrawImage(item.HeadImage, item.HeadRect);
//item.TailRect = new Rectangle(rectItem.Right - 10 - item.TailButton.Width, rectItem.Top + 2,
// item.TailButton.Width, item.TailButton.Height);
//g.DrawImage(item.TailButton, item.TailRect);
}
/// <summary>
/// 根据索引插入一个子项
/// </summary>
/// <param name="index">索引位置</param>
/// <param name="subItem">要插入的子项</param>
public void Insert(int index, SongItem subItem)
{
if (index < 0 || index >= this.count)
{
throw new IndexOutOfRangeException("Index was outside the bounds of the array");
}
if (subItem == null)
{
throw new ArgumentNullException("SubItem cannot be null");
}
this.EnsureSpace(1);
for (int i = this.count; i > index; i--)
{
m_arrSubItems[i] = m_arrSubItems[i - 1];
}
subItem.OwnerListItem = this.owner;
m_arrSubItems[index] = subItem;
this.count++;
if (this.owner.OwnerPlayListBox != null)
{
this.owner.OwnerPlayListBox.Invalidate();
}
}
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(MousePos))
{
//判断在滚动条那个位置点击
if (VScroll.UpBounds.Contains(MousePos))
{
VScroll.Value -= 50;
}
else if (VScroll.DownBounds.Contains(MousePos))
{
VScroll.Value += 50;
}
else if (!VScroll.SliderBounds.Contains(MousePos))
{
VScroll.MoveSliderToLocation(MousePos.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
foreach (PlayList item in items)
{
if (item.Bounds.Contains(MousePos))
{
if (item.IsOpen)
{
foreach (SongItem songitem in item.SubItems)
{
if (songitem.Bounds.Contains(MousePos))
{
if (songitem.Equals(selectSubItem))
{
return;
}
selectSubItem = songitem;
this.Invalidate();
return;
}
}
if (new Rectangle(0, item.Bounds.Top, this.Width, 20).Contains(MousePos))
{
selectSubItem = null;
item.IsOpen = !item.IsOpen;
this.Invalidate();
return;
}
}
else
{
selectSubItem = null;
item.IsOpen = !item.IsOpen;
this.Invalidate();
return;
}
}
}
base.OnClick(e);
}
protected override void OnMouseMove(MouseEventArgs e)
{
MousePos = e.Location;
if (VScroll.IsMouseDown)
{
//如果滚动条的滑块处于被点击 那么移动
VScroll.MoveSliderFromLocation(e.Y);
return;
}
if (VScroll.ShouldBeDraw)
{
//如果控件上有滚动条 判断鼠标是否在滚动条区域移动
if (VScroll.Bounds.Contains(MousePos))
{
ClearItemMouseOn();
ClearSubItemMouseOn();
if (VScroll.SliderBounds.Contains(MousePos))
{
VScroll.IsMouseOnSlider = true;
}
else
{
VScroll.IsMouseOnSlider = false;
}
if (VScroll.UpBounds.Contains(MousePos))
{
VScroll.IsMouseOnUp = true;
}
else
{
VScroll.IsMouseOnUp = false;
}
if (VScroll.DownBounds.Contains(MousePos))
{
VScroll.IsMouseOnDown = true;
}
else
{
VScroll.IsMouseOnDown = false;
}
return;
}
else
{
VScroll.ClearAllMouseOn();
}
}
MousePos.Y += VScroll.Value;
//如果不在滚动条范围类 那么根据滚动条当前值计算虚拟的一个坐标
for (int i = 0, Len = items.Count; i < Len; i++)
{
//然后判断鼠标是否移动到某一列表项或者子项
if (items[i].Bounds.Contains(MousePos))
{
if (items[i].IsOpen)
{
//如果展开 判断鼠标是否在某一子项上面
for (int j = 0, lenSubItem = items[i].SubItems.Count; j < lenSubItem; j++)
{
if (items[i].SubItems[j].Bounds.Contains(MousePos))
{
if (MouseOnSongItem != null)
{
//如果当前鼠标下子项不为空
if (items[i].SubItems[j].HeadRect.Contains(MousePos))
{
//判断鼠标是否在头像内
if (!OnMouseEnterHeaded)
{
//如果没有触发进入事件 那么触发用户绑定的事件
OnMouseEnterHead(new ChatListEventArgs(this.MouseOnSongItem, this.selectSubItem));
OnMouseEnterHeaded = true;
}
}
else
{
if (OnMouseEnterHeaded)
{
//如果已经执行过进入事件 那触发用户绑定的离开事件
OnMouseLeaveHead(new ChatListEventArgs(this.MouseOnSongItem, this.selectSubItem));
OnMouseEnterHeaded = false;
}
}
}
if (items[i].SubItems[j].Equals(MouseOnSongItem))
{
return;
}
ClearSubItemMouseOn();
ClearItemMouseOn();
MouseOnSongItem = items[i].SubItems[j];
this.Invalidate(new Rectangle(
MouseOnSongItem.Bounds.X, MouseOnSongItem.Bounds.Y - VScroll.Value,
MouseOnSongItem.Bounds.Width, MouseOnSongItem.Bounds.Height));
//this.Invalidate();
return;
}
}
ClearSubItemMouseOn(); //循环做完没发现子项 那么判断是否在列表上面
if (new Rectangle(0, items[i].Bounds.Top - VScroll.Value, this.Width, 20).Contains(e.Location))
{
if (items[i].Equals(MouseOnList))
{
return;
}
ClearItemMouseOn();
MouseOnList = items[i];
this.Invalidate(new Rectangle(
MouseOnList.Bounds.X, MouseOnList.Bounds.Y - VScroll.Value,
MouseOnList.Bounds.Width, MouseOnList.Bounds.Height));
//this.Invalidate();
return;
}
}
else
{ //如果列表项没有展开 重绘列表项
if (items[i].Equals(MouseOnList))
{
return;
}
ClearItemMouseOn();
ClearSubItemMouseOn();
MouseOnList = items[i];
this.Invalidate(new Rectangle(
MouseOnList.Bounds.X, MouseOnList.Bounds.Y - VScroll.Value,
MouseOnList.Bounds.Width, MouseOnList.Bounds.Height));
//this.Invalidate();
return;
}
}
}//若循环结束 既不在列表上也不再子项上 清空上面的颜色
ClearItemMouseOn();
ClearSubItemMouseOn();
base.OnMouseMove(e);
}
/// <summary>
/// 判断子项是否在集合内
/// </summary>
/// <param name="subItem">要判断的子项</param>
/// <returns>是否在集合内</returns>
public bool Contains(SongItem subItem)
{
return(this.IndexOf(subItem) != -1);
}
/// <summary>
/// 获取索引位置
/// </summary>
/// <param name="subItem">要获取索引的子项</param>
/// <returns>索引</returns>
public int IndexOf(SongItem subItem)
{
return(Array.IndexOf <SongItem>(m_arrSubItems, subItem));
}
public ChatListEventArgs(SongItem mouseonsubitem, SongItem selectsubitem)
{
this.mouseOnSubItem = mouseonsubitem;
this.selectSubItem = selectsubitem;
}