public static void OnReportCellStringDrawing(ReportCellStringDrawingArgs e)
{
if (ReportCellStringDrawing != null)
{
ReportCellStringDrawing(e);
}
}
public virtual RectangleF DrawContent(Graphics g, float scale, I3ReportData reportData, I3ReportCell cell, RectangleF rect, I3ReportCellStyle style, I3PrintArea area, bool draw)
{
string text = GetText(cell, area);
if (string.IsNullOrEmpty(text))
{
return(RectangleF.Empty);
}
StringFormat sf = GetStringFormat(cell, style);
//TextFormatFlags ff = GetTextFormatFlags(cell, style);
Brush brush = new SolidBrush(style.FontColor);
Font font = GetFont(scale, cell, style);
string[] strs = text.Split(new string[] { NewLineFlag }, StringSplitOptions.None);
try
{
//先计算正常位置
RectangleF rr = RectangleF.Empty;
List <RectangleF> rectList = new List <RectangleF>();
float startY = float.MaxValue; //上线
float endY = float.MinValue; //下线
foreach (string str in strs)
{
#region 计算文本绘制区域
SizeF sizeF = g.MeasureString(str, font, (int)rect.Width, sf);
//Size sizeF = TextRenderer.MeasureText(g, str, font, new Size((int)rect.Width, 200), ff);
RectangleF r = new RectangleF(rect.X, rect.Y, rect.Width, rect.Height);
if (style.Alignment == StringAlignment.Center)
{
r.X += r.Width / 2 - sizeF.Width / 2;
r.Width = sizeF.Width;
}
else if (style.Alignment == StringAlignment.Far)
{
r.X += r.Width - sizeF.Width;
r.Width = sizeF.Width;
}
else
{
r.Width = sizeF.Width;
}
if (style.LineAlignment == StringAlignment.Center)
{
r.Y += r.Height / 2 - sizeF.Height / 2;
r.Height = sizeF.Height;
}
else if (style.LineAlignment == StringAlignment.Far)
{
r.Y += r.Height - sizeF.Height;
r.Height = sizeF.Height;
}
else
{
r.Height = sizeF.Height;
}
#endregion
#region 居中或居下时的处理
if (style.LineAlignment == StringAlignment.Center)
{
//下面会有一点空白区域，下移以便于达到真正的垂直居中
//RectangleF stringRect = new RectangleF(r.X, r.Y + r.Height * 0.1F, r.Width, sizeF.Height);
//r = stringRect;
//2017.10.09 调整了一下偏移量，不然自动换行时，上面有间距而下面没有
RectangleF stringRect = new RectangleF(r.X, r.Y + r.Height * 0.05F, r.Width, sizeF.Height);
r = stringRect;
}
else if (style.LineAlignment == StringAlignment.Far)
{
//下面会有一点空白区域，下移以便于达到真正的垂直居下
RectangleF stringRect = new RectangleF(r.X, r.Y + r.Height * 0.2F, r.Width, r.Height);
r = stringRect;
}
#endregion
rectList.Add(r);
startY = Math.Min(startY, r.Y);
endY = Math.Max(endY, r.Y + r.Height);
}
float centerY = startY + (endY - startY) / 2;//中线
float stepY = endY - startY;
//再计算换行引起的位置偏移
int i = -1;
foreach (string str in strs)
{
i++;
RectangleF r = rectList[i];
#region 换行位置调整
if (strs.Length > 0) //有多行才做调整
{
if (style.LineAlignment == StringAlignment.Center) //居中
{
float totalHeight = strs.Length * stepY;
float totalStartY = centerY - totalHeight / 2;
r.Y = totalStartY + stepY * i;
}
else if (style.LineAlignment == StringAlignment.Far)//靠下
{
float thisEndY = endY - stepY * i;
r.Y = thisEndY - r.Height;
}
else//靠上
{
r.Y = startY + stepY * i;
}
}
#endregion
#region 绘制
if (draw && !r.IsEmpty)
{
ReportCellStringDrawingArgs e = new ReportCellStringDrawingArgs(g, str, font, brush, r, sf);
OnReportCellStringDrawing(e);
if (!e.Hand)
{
//try
//{
//用这句，有的电脑上会报错 A generic error occurred in GDI+.
g.DrawString(str, font, brush, r, sf);
//用这句，不报错了，但是放大缩小时，有的文字会不显示，而且参数不一样，估计输出结果可能也不一样
//Rectangle r2 = new Rectangle((int)Math.Ceiling(r.Left), (int)Math.Ceiling(r.Top), (int)Math.Ceiling(r.Width), (int)Math.Ceiling(r.Height));
//TextRenderer.DrawText(g, str, font, r2, style.FontColor, ff);
//}
//catch (Exception ex)
//{
// I3LocalLogUtil.Current.WriteExceptionLog("drawstring error", ex);
// I3LocalLogUtil.Current.WriteInfoLog(str);
// I3LocalLogUtil.Current.WriteInfoLog(font.ToString());
// I3LocalLogUtil.Current.WriteInfoLog(brush.ToString());
// I3LocalLogUtil.Current.WriteInfoLog(r.ToString());
// I3LocalLogUtil.Current.WriteInfoLog(sf.ToString());
// I3LocalLogUtil.Current.CompleteLog();
//}
}
}
#endregion
#region 相交区域处理
if (rr == RectangleF.Empty)
{
rr = r;
}
else
{
rr.Y = Math.Min(rr.Y, r.Y); //y取最小值
float yEnd = Math.Max(rr.Y + rr.Height, r.Y + r.Height); //yEnd取最大值
rr.Height = yEnd - rr.Y;
rr.X = Math.Min(rr.X, r.X); //x取最小值
float xEnd = Math.Max(rr.X + rr.Width, r.X + r.Width); //xEnd取最大值
rr.Width = xEnd - rr.X;
}
#endregion
}
return(rr);
}
finally
{
font.Dispose();
brush.Dispose();
sf.Dispose();
}
}
