internal void SetSelectionStartItem(Point p)
{
//清除其他的选择状态
this.Clear();
MessageListItem item = _owner.GetItemAtPosition(p) as MessageListItem;
if (item == null)
{
return;
}
//设定文本选中
if (item.Message.Type == MessageType.Text)
{
this._selectingTextItem = item;
Rectangle rect = item.Bounds;
for (int i = 0; i < this._selectingTextItem.DrawingObjects.Count; i++)
{
DrawingObject dobj = item.DrawingObjects[i];
if (dobj.Type == DrawingObjectType.TextBlock)
{
Rectangle bounds = dobj.Offset(rect.X, rect.Y);
if (bounds.Contains(p))
{
TextBlockObj tb = dobj.Tag as TextBlockObj;
StringPart sp = tb.StringPart;
using (Graphics g = _owner.CreateGraphics())
{
tb.SelectionStart = StringMeasurer.GetCharIndex(g, sp.Font, p.X - (int)dobj.X, sp.String);
this._selectStartDoIndex = i;
break;
}
}
}
}
}
}
public TextBlockObj(StringPart sp)
{
this.StringPart = sp;
ClearSelection();
}
public static List <StringPart> Measure(Graphics g, Font font, int width, string str)
{
List <StringPart> spList = new List <StringPart>(16);
int pos = 0;
int x = 0, y = 0, w = 0, h = font.Height;
string cutStr = "";
bool cFlag = false;
bool cWrapFlag = false;
for (int i = 0; i < str.Length;)
{
cWrapFlag = false;
if (i == str.Length - 1)
{
w += GetCharWidth(str[i], g, font);
cutStr = str.Substring(pos, i - pos + 1);
cFlag = true;
i++;
}
else if (str[i] == '\r')
{
cutStr = str.Substring(pos, i - pos);
if (i + 1 < str.Length)
{
//\r\n
i += 2;
}
else
{
i++;
}
cFlag = true;
}
else if (str[i] == '\n')
{
cutStr = str.Substring(pos, i - pos);
i++;
cFlag = true;
}
else
{
w += GetCharWidth(str[i], g, font);
if (w > width)
{
cutStr = str.Substring(pos, i - pos);
cFlag = true;
cWrapFlag = true;
}
else
{
cFlag = false;
}
}
if (cFlag)
{
StringPart sp = new StringPart
{
Bounds = new Rectangle(x, y, w, h),
String = cutStr,
TextFormatFlags = TextFormatFlags,
Font = font,
Wrap = cWrapFlag,
};
spList.Add(sp);
pos = i;
y += h; w = 0;
}
else
{
i++;
}
}
return(spList);
}
protected override void OnDrawItem(UI.DrawItemEventArgs args)
{
MessageListItem item = args.Item as MessageListItem;
Message m = item.Message;
args.DrawBackground();
Graphics g = args.Graphics;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Rectangle rect = item.Bounds;
Rectangle drawingObjRect;
Point pos = PointToClient(MousePosition);
foreach (DrawingObject dobj in item.DrawingObjects)
{
drawingObjRect = dobj.Offset(rect.X, rect.Y);
switch (dobj.Type)
{
//头像
case DrawingObjectType.ProfilePhoto:
{
g.DrawImage(ProfilePhotoPool.GetPhoto(item.User.ID), drawingObjRect);
if (drawingObjRect.Contains(pos))
{
g.DrawRectangle(IMAGE_BORDER_PEN_FOCUS, drawingObjRect.X, drawingObjRect.Y, drawingObjRect.Width, drawingObjRect.Height);
}
break;
}
//时间, 昵称，状态
case DrawingObjectType.Title:
{
string text = item.User.NickName + " " + m.Time.ToString("yyyy/MM/dd HH:mm:ss");
if (!m.Flag)
{
text += " 传送失败";
}
TextRenderer.DrawText(g, text,
args.Font, new Point((int)drawingObjRect.X, (int)drawingObjRect.Y)
, m.Flag ? SUCCESS_TITLE_COLOR : ERROR_TITLE_COLOR, TextFormatFlags.Left);
break;
}
//文本消息
case DrawingObjectType.TextBlock:
{
TextBlockObj tb = dobj.Tag as TextBlockObj;
StringPart sp = tb.StringPart;
int selStart = Math.Min(tb.SelectionStart, tb.SelectionEnd);
int selEnd = Math.Max(tb.SelectionStart, tb.SelectionEnd);
string str1 = selStart == -1 ? sp.String : sp.String.Substring(0, selStart);
string str2 = selStart == -1 ? "" : sp.String.Substring(selStart, tb.SelectionLength);
string str3 = selEnd == -1 ? "" : sp.String.Substring(selEnd + 1);
//选择前的文本
if (!string.IsNullOrEmpty(str1))
{
TextRenderer.DrawText(g, str1, sp.Font, new Point((int)drawingObjRect.X, (int)drawingObjRect.Y), args.ForeColor,
StringMeasurer.TextFormatFlags);
}
//选择中文本
if (!string.IsNullOrEmpty(str2))
{
int w1 = StringMeasurer.Width(g, sp.Font, str1, sp.TextFormatFlags);
int w2 = StringMeasurer.Width(g, sp.Font, str2, sp.TextFormatFlags);
drawingObjRect.X += w1;
drawingObjRect.Width = w2;
g.FillRectangle(BrushPool.GetBrush(TEXT_SELECTION_BACK_COLOR), drawingObjRect);
TextRenderer.DrawText(g, str2, sp.Font, new Point((int)drawingObjRect.X, (int)drawingObjRect.Y),
TEXT_SELECTION_FORE_COLOR, StringMeasurer.TextFormatFlags);
//选择后的文本
if (!string.IsNullOrEmpty(str3))
{
drawingObjRect.X += w2;
drawingObjRect.Width = dobj.Width - w1 - w2;
TextRenderer.DrawText(g, str3, sp.Font, new Point((int)drawingObjRect.X, (int)drawingObjRect.Y), args.ForeColor,
StringMeasurer.TextFormatFlags);
}
}
break;
}
case DrawingObjectType.Image:
{
Image image = (m as ImageMessage).Image;
g.DrawImage(image, drawingObjRect);
if (drawingObjRect.Contains(pos))
{
g.DrawRectangle(IMAGE_BORDER_PEN_FOCUS, drawingObjRect.X, drawingObjRect.Y, drawingObjRect.Width, drawingObjRect.Height);
}
else
{
g.DrawRectangle(IMAGE_BORDER_PEN, drawingObjRect.X, drawingObjRect.Y, drawingObjRect.Width, drawingObjRect.Height);
}
break;
}
case DrawingObjectType.File:
{
FileMessage fm = m as FileMessage;
//底背景
g.FillRectangle(Brushes.White, drawingObjRect);
if (drawingObjRect.Contains(pos))
{
g.DrawRectangle(IMAGE_BORDER_PEN_FOCUS, drawingObjRect.X, drawingObjRect.Y, drawingObjRect.Width, drawingObjRect.Height);
}
else
{
g.DrawRectangle(IMAGE_BORDER_PEN, drawingObjRect.X, drawingObjRect.Y, drawingObjRect.Width, drawingObjRect.Height);
}
//文件名，文件大小，ICON
Image image = FileIconPool.GetIcon(fm.OriginFilePath);
int imageWidth = 64;
int imageHeight = 64 * image.Height / image.Width;
Rectangle imageRect = new Rectangle(drawingObjRect.X + FILE_SEND_WIDTH - imageWidth - MARGIN, drawingObjRect.Y + MARGIN, imageWidth, FILE_SEND_HEIGHT - Font.Height - MARGIN * 3);
Rectangle fileNameRect = new Rectangle(drawingObjRect.X + MARGIN, drawingObjRect.Y + MARGIN, FILE_SEND_WIDTH - imageWidth - MARGIN * 3, FILE_SEND_HEIGHT - Font.Height - MARGIN * 3);
Rectangle fontRect = new Rectangle(drawingObjRect.X + MARGIN, drawingObjRect.Y + FILE_SEND_HEIGHT - Font.Height - MARGIN, FILE_SEND_WIDTH - MARGIN * 2, Font.Height);
Rectangle pieRect = new Rectangle(drawingObjRect.X + (FILE_SEND_WIDTH - PROGRESS_PIE_D) / 2, drawingObjRect.Y + (FILE_SEND_HEIGHT - PROGRESS_PIE_D) / 2, PROGRESS_PIE_D, PROGRESS_PIE_D);
Rectangle processRect = new Rectangle(drawingObjRect.X, drawingObjRect.Y + (FILE_SEND_HEIGHT - Font.Height * 2) / 2, FILE_SEND_WIDTH, Font.Height * 2);
//当文件名超过显示部分时，中间用省略号表示
string str = fm.FileName;
SizeF s = g.MeasureString(fm.FileName, Font, new System.Drawing.SizeF((float)fileNameRect.Width, (float)fileNameRect.Height), StringFormat.GenericDefault, out int count, out int lines);
if (s.Height >= fileNameRect.Height & str.Length >= count)
{
//由于会出现半行的情况，直接写死了所取的字符串数目
str = str.Substring(0, 36) + "・・・" + str.Substring(str.Length - 4);
}
g.DrawImage(image, imageRect.X, imageRect.Y, imageWidth, imageHeight);
g.DrawString(str, args.Font, Brushes.Black, fileNameRect);
TextRenderer.DrawText(g, LanFile.HumanReadbleLen(fm.FileLength), args.Font, fontRect, Color.FromArgb(0, 0, 0), TextFormatFlags.Left);
if (item.State == MessageState.Receiving ||
item.State == MessageState.Sending)
{
//接受进度
g.FillRectangle(MESSAGELIST_PROGRESS_BACKGROUND_BRUSH, drawingObjRect);
g.DrawPie(PROGRESS_PEN, pieRect, 0, 360);
g.FillPie(MESSAGELIST_PROGRESS_FILLED_BRUSH, pieRect, 0, 360 * item.Progress / 100);
//TODO 显示剩余时间，传输速度
TextRenderer.DrawText(g, item.Progress + "%" + "\r\n" + LanFile.HumanReadbleLen(item.FileTransportedLength) + "/" + LanFile.HumanReadbleLen(fm.FileLength),
args.Font, processRect, Color.FromArgb(0, 0, 0), TextFormatFlags.HorizontalCenter);
}
break;
}
}
}
}
internal void SetSelectionEndItem(Point location)
{
if (!this.HasSelection)
{
return;
}
MessageListItem hoverItem = _owner.GetItemAtPosition(location) as MessageListItem;
if (hoverItem == null)
{
//鼠标移动到其他地方了，算了，不选了
this.Clear();
return;
}
if (hoverItem != this._selectingTextItem)
{
//当前的选择的不是上面一个
this.Clear();
return;
}
Rectangle rect = this._selectingTextItem.Bounds;
for (int i = 0; i < this._selectingTextItem.DrawingObjects.Count; i++)
{
DrawingObject dobj = this._selectingTextItem.DrawingObjects[i];
if (dobj.Type == DrawingObjectType.TextBlock)
{
Rectangle bounds = dobj.Offset(rect.X, rect.Y);
TextBlockObj tb = dobj.Tag as TextBlockObj;
if (bounds.Contains(location))
{
StringPart sp = tb.StringPart;
using (Graphics g = _owner.CreateGraphics())
{
tb.SelectionEnd = StringMeasurer.GetCharIndex(g, sp.Font, location.X - (int)dobj.X, sp.String);
this._selectEndDoIndex = i;
break;
}
}
}
}
//开始与结束直接的所有TextBlock都设定为全选中
int startIndex = Math.Min(this._selectStartDoIndex, this._selectEndDoIndex);
int endIndex = Math.Max(this._selectStartDoIndex, this._selectEndDoIndex);
List <TextBlockObj> selObj = new List <TextBlockObj>();
for (int i = startIndex; i <= endIndex; i++)
{
DrawingObject dobj = this._selectingTextItem.DrawingObjects[i];
if (dobj.Type == DrawingObjectType.TextBlock)
{
TextBlockObj tbObj = dobj.Tag as TextBlockObj;
if (this._selectStartDoIndex < this._selectEndDoIndex)
{
//从上往下选择时
if (i == this._selectStartDoIndex)
{
tbObj.SelectionEnd = tbObj.Length - 1;
}
else if (i == this._selectEndDoIndex)
{
tbObj.SelectionStart = 0;
}
}
else if (this._selectStartDoIndex > this._selectEndDoIndex)
{
//从下往上选择时
if (i == this._selectStartDoIndex)
{
tbObj.SelectionEnd = 0;
}
else if (i == this._selectEndDoIndex)
{
tbObj.SelectionStart = tbObj.Length - 1;
}
}
if (i != this._selectStartDoIndex && i != this._selectEndDoIndex)
{
tbObj.SelectAll();
}
selObj.Add(tbObj);
this._prevSelection.Remove(tbObj);
}
}
//清除选择
foreach (TextBlockObj item in this._prevSelection)
{
item.ClearSelection();
}
this._prevSelection = selObj;
}