CFX_FloatRect CalculateRect(CPDF_RectArray* pRectArray) {
CFX_FloatRect rcRet;
rcRet.left = GetMinMaxValue(*pRectArray, MIN, LEFT);
rcRet.top = GetMinMaxValue(*pRectArray, MAX, TOP);
rcRet.right = GetMinMaxValue(*pRectArray, MAX, RIGHT);
rcRet.bottom = GetMinMaxValue(*pRectArray, MIN, BOTTOM);
return rcRet;
}
//按照等距自动进行分段
void CRangeRenderPage::OnBnClickedBtnAutoSetrange()
{
UpdateData(TRUE);
if(m_Breaknum<=0 || m_renderField.IsEmpty())
{
return;
}
double dmin=0.0,dmax =0.0;
//获得字段的最大最小值
GetMinMaxValue(dynamic_cast<Geodatabase::IFeatureClass*>(m_pLayer->GetDataObject().get()),
m_renderField,&dmax,&dmin);
m_Classes.clear();
m_list.DeleteAll();
COLORREF beginColor =m_ctlColorRamp.get_curStartColor();
COLORREF endColor =m_ctlColorRamp.get_curEndColor();
RangeItem item;
Display::ISymbolPtr pDefaultSymbol =CreateDefaultSymbol(dynamic_cast<Geodatabase::IFeatureClass*>(m_pLayer->GetDataObject().get()));
Display::ISymbolPtr pSymbol;
//如果最大最小值相等，则只分一个段
if(dmin ==dmax)
{
item.max =dmax;
item.min =dmin;
pSymbol =pDefaultSymbol->Clone();
pSymbol->SetColor(beginColor);
item.pSymbol =pSymbol;
item.strLabel.Format("%.6f%s%.6f",item.min,"-",item.max);
m_Classes.push_back(item);
}
else
{
//获取过渡色彩的各个分量
int begin_r_color = (int)GetRValue(beginColor);
int begin_g_color = (int)GetGValue(beginColor);
int begin_b_color = (int)GetBValue(beginColor);
int end_r_color =(int) GetRValue(endColor);
int end_g_color =(int) GetGValue(endColor);
int end_b_color =(int) GetBValue(endColor);
double dr,dg,db;
BYTE markr,markg,markb;
if(m_Breaknum == 1)
{
dr = end_r_color - begin_r_color;
dg = end_g_color - begin_g_color;
db = end_b_color - begin_b_color;
}
else
{
dr = (end_r_color - begin_r_color) / (double)(m_Breaknum - 1);
dg = (end_g_color - begin_g_color) / (double)(m_Breaknum - 1);
db = (end_b_color - begin_b_color) / (double)(m_Breaknum - 1);
}
double step =(dmax-dmin)/m_Breaknum;
//分段的方法
/*
upper = min + i * step
保留六位有效位
下一个区间为上一个的上限+0.000001
*/
//依次加入区间
for(int i=0;i<m_Breaknum;i++)
{
markr =begin_r_color+i*dr;
markg =begin_g_color+i*dg;
markb =begin_b_color +i*db;
item.min =dmin+step*i+0.000001;
item.max =dmin+step*(i+1);
pSymbol =pDefaultSymbol->Clone();
pSymbol->SetColor(RGB(markr,markg,markb));
item.pSymbol =pSymbol;
item.strLabel.Format("%.6f%s%.6f",item.min,"-",item.max);
m_Classes.push_back(item);
}
//设置第一个和最后一个区间
m_Classes[0].min =dmin;
m_Classes[m_Breaknum-1].max =dmax;
}
//将各个分段添加到列表中
for(size_t i=0;i<m_Classes.size();i++)
{
m_list.AddSymbolItem(m_Classes[i].pSymbol,m_Classes[i].strLabel,m_Classes[i].strLabel);
}
}