protected override Bitmap GetLegendBmp(int w, int h)
{
if (_legendItems == null || _count == 0)
{
return(null);
}
if (w <= 0 || h <= 0)
{
return(null);
}
Bitmap bm = new Bitmap(w, h);
using (Graphics gps = Graphics.FromImage(bm))
{
gps.Clear(_backColor);
gps.SmoothingMode = SmoothingMode.HighQuality;
int i = 0;
if (!string.IsNullOrEmpty(_text))
{
using (LegendItem textItem = new LegendItem(_text))
{
DrawLegendItem(gps, textItem, i, w);
i++;
}
}
foreach (LegendItem it in _legendItems)
{
DrawLegendItem(gps, it, i, w);
i++;
}
}
return(bm);
}
/// <summary>
/// 暂未使用
/// </summary>
/// <param name="xml">Parent xml</param>
/// <returns></returns>
public static LegendItem[] ToLegendItems(XElement parentXml)
{
if (parentXml == null)
{
return(null);
}
XElement root = parentXml.Element("LegendItems");
if (root == null)
{
return(null);
}
IEnumerable <XElement> xmls = root.Elements("LegendItem");
if (xmls == null || xmls.Count() == 0)
{
return(null);
}
List <LegendItem> items = new List <LegendItem>();
foreach (XElement xml in xmls)
{
LegendItem item = LegendItem.ToLegendItem(xml);
if (item != null)
{
items.Add(item);
}
}
if (items.Count == 0)
{
return(null);
}
return(items.ToArray());
}
/// <summary>
/// 暂未使用
/// </summary>
/// <param name="items"></param>
/// <returns></returns>
public static XElement ToXml(LegendItem[] items)
{
if (items == null || items.Length == 0)
{
return(null);
}
List <XElement> content = new List <XElement>();
foreach (LegendItem item in items)
{
XElement xml = LegendItem.ToXml(item);
if (xml != null)
{
content.Add(xml);
}
}
if (content.Count == 0)
{
return(null);
}
else
{
return(new XElement("LegendItems", content));
}
}
private void DrawLegendItem(Graphics g, LegendItem legendItem, int i, int legendWidth)
{
int x = i * _legendItemWidth + BORDER_BLANK * 2;
SizeF textSize = g.MeasureString(_text, _legendTextFont);
if (legendItem.Color.IsEmpty)
{
g.DrawString(_text, _legendTextFont, Brushes.Black, x + BORDER_BLANK, BORDER_BLANK);
}
else
{
float y = textSize.Height == 0 ?BORDER_BLANK: BORDER_BLANK + textSize.Height + _legendTextSpan;
using (Brush brush = new SolidBrush(legendItem.Color))
{
if (brush == null)
{
return;
}
g.FillRectangle(brush, x, y, _legendItemWidth, _legendItemHeight);
if (_isShowBorder)
{
g.DrawRectangle(new Pen(_borderColor), x, y, _legendItemWidth, _legendItemHeight);
}
}
float textY = textSize.Height == 0 ? _legendItemHeight + BORDER_BLANK + _legendTextSpan : _legendItemHeight + BORDER_BLANK + _legendTextSpan * 2 + textSize.Height;
g.DrawString(legendItem.Text, _legendTextFont, Brushes.Black, x - BORDER_BLANK, textY);
}
}
protected override Bitmap GetLegendBmp(int w, int h)
{
if (_legendItems == null || _count == 0)
{
return(null);
}
if (w <= 0 || h <= 0)
{
return(null);
}
Bitmap bm = new Bitmap(w, h);
using (Graphics gps = Graphics.FromImage(bm))
{
gps.Clear(_backColor);
gps.SmoothingMode = SmoothingMode.HighQuality;
if (_isTopToBottom)
{
_topY = 0;
}
else
{
SizeF textSize = gps.MeasureString(_text, _legendTextFont);
_topY = h - (_legendItems.Length * (_legendItemHeight + _legendItemSpan) + textSize.Height);
}
int i = 0;
if (!string.IsNullOrEmpty(_text)) //图例标题
{
using (LegendItem textItem = new LegendItem(_text))
{
DrawLegendItem(gps, textItem, i, w);
i++;
}
}
foreach (LegendItem it in _legendItems)
{
DrawLegendItem(gps, it, i, w);
i++;
}
}
return(bm);
}
private void DrawLegendItem(Graphics g, LegendItem legendItem, int i, int legendWidth)
{
SizeF textSize = g.MeasureString(legendItem.Text, _legendTextFont);
float y;
float textY;
if (!string.IsNullOrEmpty(_text))
{
if (i == 0)
{
y = BORDER_BLANK + _topY;
}
else
{
y = textSize.Height + _legendTextSpan + BORDER_BLANK + (i - 1) * (_legendItemHeight + _legendItemSpan) + _topY;
}
}
else
{
y = (BORDER_BLANK + i * (_legendItemHeight + _legendItemSpan)) + _topY;
}
if (legendItem.Color.IsEmpty)
{
g.DrawString(legendItem.Text, _legendTextFont, Brushes.Black, BORDER_BLANK * 2, y);
}
else
{
using (Brush brush = new SolidBrush(legendItem.Color))
{
g.FillRectangle(brush, BORDER_BLANK, y, _legendItemWidth, _legendItemHeight);
if (_isShowBorder)
{
g.DrawRectangle(new Pen(_borderColor), BORDER_BLANK, y, _legendItemWidth, _legendItemHeight);
}
}
textY = (_legendItemHeight < textSize.Height ? y : y + Math.Abs(_legendItemHeight - textSize.Height) / 2f);
g.DrawString(legendItem.Text, _legendTextFont, Brushes.Black, _legendItemWidth + BORDER_BLANK + _legendTextSpan, textY);
}
}
private void DrawLegendItem(Graphics g, LegendItem legendItem, int i, int legendWidth)
{
int rowNo = i / _colCount; //当前行
int colNo = i % _colCount; //当前列
float y = 0f; //图块x坐标
float x = 0f; //图块y坐标
if (!string.IsNullOrEmpty(_text))
{
y = rowNo * (_legendItemHeight + _legendItemSpan) + _titleSize.Height + _legendTextSpan + BORDER_BLANK;
}
else
{
y = rowNo * (_legendItemHeight + _legendItemSpan) + BORDER_BLANK;
}
if (colNo == 0)
{
x = BORDER_BLANK;
}
else
{
x = colNo * (_legendItemWidth + _legendItemSpan + _maxTextWidth) + BORDER_BLANK;
}
if (!legendItem.Color.IsEmpty)
{
using (Brush brush = new SolidBrush(legendItem.Color))
{
g.FillRectangle(brush, x, y, _legendItemWidth, _legendItemHeight);
}
}
if (_isShowBorder)
{
g.DrawRectangle(new Pen(_borderColor), x, y, _legendItemWidth, _legendItemHeight);
}
SizeF textSize = g.MeasureString(legendItem.Text, _legendTextFont);
g.DrawString(legendItem.Text, _legendTextFont, Brushes.Black, x + _legendItemWidth + _legendItemSpan, y + Math.Abs(_legendItemHeight - textSize.Height) / 2f);
}
