我的基本實現想法是，在同乙個view視窗下家兩個cmapx控制項，乙個稱為主圖，乙個稱為鷹眼圖。
cmapx m_ctrlmapx; ///主圖
cmapx m_eaglemapx; ///鷹眼圖
注意事項：在view裡的oncreate函式一定要想建立m_eaglemapx，這樣才能看見鷹眼圖。既如此：
m_eaglemapx.create(null, ws_visible, crect(0, 0, 120, 120), this, idc_map_eagle);
m_eaglemapx.setgeoset(null);
m_ctrlmapx.create(null, ws_visible, crect(0, 0, 100, 100), this, idc_map);
m_ctrlmapx.setgeoset(null);
接下來，可以在主圖里挑幾層加到鷹眼圖中（區域圖層）
再在訊息中對映幾個訊息：
on_event(cmtrsview, idc_map_eagle, dispid_mousemove /* mousemove */, onmousemoveeaglemap, vts_i2 vts_i2 vts_r4 vts_r4)
on_event(cmtrsview, idc_map_eagle, dispid_mousedown /* mousedown */, onmousedowneaglemap, vts_i2 vts_i2 vts_r4 vts_r4)
on_event(cmtrsview, idc_map_eagle, dispid_mouseup /* mouseup */, onmouseupeaglemap, vts_i2 vts_i2 vts_r4 vts_r4)
最後實現這幾個函式：
void cmtrsview::onmouseupeaglemap(short button, short shift, float x, float y)
///使用者在導航圖上框出矩形區域時的處理
if(strmousestate == "move")
else
if(prex < y)
else
double dblxmax, dblxmin, dblymax, dblymin;
m_eaglemapx.convertcoord(&sngxmin, &sngymin, &dblxmin, &dblymin, miscreentomap);
m_eaglemapx.convertcoord(&sngxmax, &sngymax, &dblxmax, &dblymax, miscreentomap);
cmapxrectangle rect;
rect.createdispatch(rect.getclsid());
rect.set(dblxmin, dblymin, dblxmin, dblymax);
m_ctrlmapx.setbounds(rect.m_lpdispatch);
}strmousestate = "stop";
}void cmtrsview::onmousedowneaglemap(short button, short shift, float x, float y)
if(button == vbleftbutton)
void cmtrsview::onmousemoveeaglemap(short button, short shift, float x, float y)
///在導航圖鷹眼層畫虛線矩形框,框出使用者預選擇的範圍
cmapxfeature ftrmap;
colevariant pntsvt, styvt;
pntsvt.vt = vt_dispatch;
pntsvt.pdispval = pnt**ap.m_lpdispatch;
pntsvt.pdispval->addref();
styvt.vt = vt_dispatch;
styline.createdispatch(styline.getclsid());
styvt.pdispval = styline.m_lpdispatch;
styvt.pdispval->addref();
ftrmap = m_eaglemapx.getfeaturefactory().createline(pntsvt, styvt);
m_eaglemapx.getlayers().item("eaglelayer").addfeature(ftrmap);
///設定滑鼠狀態為"move"
strmousestate = "move";
}還有，可以在onsize裡面設定一下鷹眼圖的大小.
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