private void DrawHierItem(PaintEventArgs e, HierItem it, ref int hierCount, ref float y, ref float maxwidth)
{
float x = hierCount * _indent;
float oldx = x;
Color color = ForeColor;
Font font = GetFont(it, out color);
//draw image
Image img = GetImage(it, crtIndex, e.Graphics);
if (img != null)
{
e.Graphics.DrawImageUnscaled(img, (int)x, (int)y);
x += (img.Width + cstSpanImgAndTitle);
}
//draw title
SizeF fontsize = e.Graphics.MeasureString(it.Title, font);
using (Brush brush = new SolidBrush(color))
{
e.Graphics.DrawString(it.Title, font, brush, x, y);
maxwidth = Math.Max(maxwidth, x + fontsize.Width);
}
it._imgBounds = new RectangleF(oldx, y, img.Width, img.Height);
it._titleBounds = new RectangleF(x, y, x + fontsize.Width, fontsize.Height);
y += fontsize.Height;
//draw properties
if (!it._isclosed && it.Properties != null && it.Properties.Count > 0)
{
float maxLen = GetMaxLenOfPropertyName(e.Graphics, font, it.Properties.Keys);
float px = x + cstOffsetProperty;
y += cstSpanBetweenProperty;
using (Brush brush = new SolidBrush(ForeColor))
{
foreach (string name in it.Properties.Keys)
{
e.Graphics.DrawString(name, Font, brush, px, y);
e.Graphics.DrawString(":" + it.Properties[name], Font, brush, px + maxLen, y);
y += fontsize.Height;
y += cstSpanBetweenProperty;
//
fontsize = e.Graphics.MeasureString(":" + it.Properties[name], Font);
maxwidth = Math.Max(maxwidth, px + maxLen + fontsize.Width);
}
}
}
y += cstSpanBetweenItem;
//draw children
if (!it._isclosed && it.ChildCount > 0)
{
hierCount++;
foreach (HierItem child in it.Children)
{
DrawHierItem(e, child, ref hierCount, ref y, ref maxwidth);
}
hierCount--;
}
}
private Font GetFont(HierItem it, out Color color)
{
if (it.IsHotlink)
{
color = Color.Blue;
return(new Font(Font.FontFamily, Font.Size, FontStyle.Underline));
}
else
{
color = ForeColor;
return(Font);
}
}
private void GetHieritemAt(Point point, HierItem parent, ref HierItem item)
{
if (parent._imgBounds.Contains(point) || parent._titleBounds.Contains(point))
{
item = parent;
return;
}
if (parent.ChildCount > 0)
{
foreach (HierItem it in parent.Children)
{
GetHieritemAt(point, it, ref item);
}
}
}
private void DrawHierItems(PaintEventArgs e)
{
if (_hierItems == null || _hierItems.Count == 0)
{
e.Graphics.DrawString("没有查询到任何要素！", Font, Brushes.Black, 4, 10);
return;
}
float y = 0;
float maxwidth = 0;
DrawPageInfos(e, ref y, true, ref maxwidth);
//
int hierCount = 0;
int endIdx = Math.Min(_hierItems.Count, _currentPage * _countPerPage + _countPerPage);
List <HierItem> drawedItems = null;
if (OnAfterDrawHierItems != null)
{
drawedItems = new List <HierItem>();
}
crtIndex = 1;
for (int i = _currentPage * _countPerPage; i < endIdx; i++)
{
HierItem it = _hierItems[i];
if (it == null)
{
continue;
}
DrawHierItem(e, it, ref hierCount, ref y, ref maxwidth);
if (drawedItems != null)
{
drawedItems.Add(it);
}
crtIndex++;
}
//
if (OnAfterDrawHierItems != null)
{
OnAfterDrawHierItems(this, drawedItems.ToArray());
}
//
DrawPageInfos(e, ref y, false, ref maxwidth);
//
Height = (int)y;
Width = (int)Math.Max(Width, maxwidth);
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (IsPageOperate(e))
{
return;
}
if (IsDisplayOperate(e))
{
return;
}
if (IsClearOperate(e))
{
return;
}
HierItem findItem = null;
int endIdx = Math.Min(_hierItems.Count, _currentPage * _countPerPage + _countPerPage);
for (int i = _currentPage * _countPerPage; i < endIdx; i++)
{
HierItem it = _hierItems[i];
GetHieritemAt(e.Location, it, ref findItem);
if (findItem != null)
{
break;
}
}
if (findItem != null)
{
if (findItem._imgBounds.Contains(e.Location))
{
findItem._isclosed = !findItem._isclosed;
}
else
if (OnClickHierItem != null)
{
OnClickHierItem(this, findItem);
}
Invalidate();
}
}
private Image GetImage(HierItem it, int i, Graphics g)
{
if (it.Image != null)
{
return(it.Image);
}
if (_imageList != null && _imageList.Images != null && it.ImageIndex >= 0 && it.ImageIndex < _imageList.Images.Count)
{
return(_imageList.Images[it.ImageIndex]);
}
Image img = imageList1.Images[0];
SizeF fontsize = g.MeasureString(i.ToString(), Font);
using (Graphics tg = Graphics.FromImage(img))
{
tg.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
tg.DrawImage(img, 0, 0);
tg.DrawString(i.ToString(), Font, Brushes.Red, (img.Width - fontsize.Width) / 2, (img.Height - fontsize.Height) / 2 - 1);
}
return(img);
}
