protected internal int CalcHeight(bool UseExpandedHeight)
{
// to affect drawing of the expansion box externally
if (m_Expanded && ExpansionBoxCustomHeightFunction != null)
{
int ht = Constants.ITEM_HEIGHT;
bool Handled = false;
ExpansionBoxCustomHeightFunction(m_Handle, m_Legend.Width, ref ht, ref Handled);
if (Handled)
{
return(ht + Constants.ITEM_HEIGHT + Constants.EXPAND_BOX_TOP_PAD * 2);
}
else
{
return(Constants.ITEM_HEIGHT);
}
}
int ret = 0;
if (this.Type == eLayerType.Grid || this.Type == eLayerType.Image)
{
if (UseExpandedHeight == false && (m_Expanded == false || ColorLegend.Count == 0)) //|| (this.Type == eLayerType.Image))
{
ret = Constants.ITEM_HEIGHT;
}
else
{
ret = Constants.ITEM_HEIGHT + (ColorLegend.Count * Constants.CS_ITEM_HEIGHT) + 2;
}
if (UseExpandedHeight || m_Expanded)
{
ret += (ColorSchemeFieldCaption.Trim() != "" ? Constants.CS_ITEM_HEIGHT : 0) + (StippleSchemeFieldCaption.Trim() != "" ? Constants.CS_ITEM_HEIGHT : 0);
}
}
else
{
var sf = m_Legend.m_Map.get_Shapefile(this.Handle);
if ((UseExpandedHeight || m_Expanded) && sf != null)
{
ret = Constants.ITEM_HEIGHT + 2; // 图层名
int val1, val2;
val1 = (GetCategoryHeight(sf.DefaultDrawingOptions) + 2); // 默认图例
if (sf.Labels.Count == 0 || sf.Labels.Visible == false || true)
{
ret += val1;
}
else
{
LabelStyle style = new LabelStyle(sf.Labels.Options);
System.Drawing.Bitmap img = new System.Drawing.Bitmap(500, 200);
Graphics g = Graphics.FromImage(img);
Size size = style.MeasureString(g, "String", 30);
val2 = size.Height + 2;
ret += val1 > val2 ? val1 : val2;
}
if (sf.Categories.Count > 0)
{
ret += Constants.CS_ITEM_HEIGHT + 2; // 标题
MapWinGIS.ShapefileCategories categories = sf.Categories;
if (this.Type == eLayerType.LineShapefile || this.Type == eLayerType.PolygonShapefile)
{
ret += sf.Categories.Count * (Constants.CS_ITEM_HEIGHT + 2);
}
else
{
for (int i = 0; i < sf.Categories.Count; i++)
{
ret += GetCategoryHeight(categories.get_Item(i).DrawingOptions);
}
}
ret += 2;
}
if (sf.Charts.Count > 0 && sf.Charts.NumFields > 0 && sf.Charts.Visible)
{
ret += (Constants.CS_ITEM_HEIGHT + 2); // 标题
ret += sf.Charts.IconHeight;
ret += 2;
ret += (sf.Charts.NumFields * (Constants.CS_ITEM_HEIGHT + 2));
}
}
else
{
ret = Constants.ITEM_HEIGHT;
}
// TODO: 标题宽度
//if (UseExpandedHeight || m_Expanded)
// ret += (ColorSchemeFieldCaption.Trim() != "" ? Constants.CS_ITEM_HEIGHT : 0) + (StippleSchemeFieldCaption.Trim() != "" ? Constants.CS_ITEM_HEIGHT : 0);
}
m_height = ret;
return(ret);
}
