【转帖】problem setting layout and extensions of the layou
 

problem setting layout and extensions of the layout
problem setting layout and extensions of the layout
with some dwg files i have a serious problem when i try to set some of the layouts and their extensions.
i use the following class to save all the informations of the dwg:
class cinstancedata
{
public:
oddbdatabaseptr pdb;
odgicontextfordbdatabaseptr pdwgcontext; // vectorization context.
odgsdeviceptr pdevice; // rendering device and set the output stream for the device.
oddblayertableptr players; // layer table
oddbsymboltableiteratorptr playeriterator;
odarray<odstring> layouts;
uint ncurrlayout;
uint nlayoutpos;
colorref nbackgroundcolor;
double minx;
double miny;
double maxx;
double maxy;
bool bdrawenabled;
};
every time the user chooses the layout to set, i call the following methods (handle is a reference to the class
cinstancedata illustrated above, and szlayout is the name of the layout).
with this method i can set and see all the layouts correctly but with the layout named "model" i cannot see the drawing,
while with odamfcapp application i can see the layout "model" correctly.
can anyone tell me how to solve the problem or where is the mistake in my code?
void winapi setactivelayout(long handle, lpctstr szlayout)
{
afx_manage_state(afxgetstaticmodulestate());
assert(handle);
if (!handle)
return;
cinstancedata *pdata = (cinstancedata *)handle;
// create device using gdi graphic engine
pdata->pdevice = null;
pdata->pdevice = theapp.m_pgswingdi->createdevice();
// search for layout
for (uint i = 0; i < pdata->layouts.size(); i++)
{
if (pdata->layouts[i].icompare(szlayout) == 0)
break;
}
// if non found, load first layout
if (i == pdata->layouts.size())
pdata->ncurrlayout = 0;
else
pdata->ncurrlayout = i;
pdata->pdb->setcurrentlayout(pdata->layouts[pdata->ncurrlayout]);
pdata->pdevice = oddbgsmanager::setupactivelayoutviews(pdata->pdevice, pdata->pdwgcontext);
odgsview *pview = pdata->pdevice->viewat(0);
odabstractviewpeptr pviewabs(pview);
odgeboundblock3d boxext;
odgepoint3d gmin;
odgepoint3d gmax;
bool bbboxvalid;
try
{
bbboxvalid = pviewabs->viewextents(pview,boxext);
}
catch (...)
{
bbboxvalid = false;
}
odgspaperlayouthelperptr ppaperlayouthelper = odgspaperlayouthelper::cast(pdata->pdevice);
if(ppaperlayouthelper.get() && ppaperlayouthelper->overallview().get() == pview)
{
if(!bbboxvalid || !(boxext.minpoint().x < boxext.maxpoint().x && boxext.minpoint().y < boxext.maxpoint().y))
{
bbboxvalid = ::getlayoutextents(ppaperlayouthelper->layoutid(), pview, boxext);
}
}
else if(!bbboxvalid) // model space viewport
{
odgslayouthelperptr playouthelper = odgslayouthelper::cast(pdata->pdevice);
if(playouthelper.get())
{
bbboxvalid = ::getlayoutextents(playouthelper->layoutid(), pview, boxext);
}
}
if(!bbboxvalid)
{
// set to somewhat reasonable (e.g. paper size)
if(pdata->pdb->getmeasurement()==oddb::kmetric)
{
boxext.set(odgepoint3d::korigin, odgepoint3d(297., 210., 0.)); // set to papersize iso a4 (portrait)
}
else
{
boxext.set(odgepoint3d::korigin, odgepoint3d(11., 8.5, 0.)); // ansi a (8.50 x 11.00) (landscape)
}
boxext.transformby(pview->viewingmatrix());
}
odgematrix3d word2eye= pview->viewingmatrix().inverse();
boxext.transformby(word2eye);
boxext.getminmaxpoints(gmin, gmax);
pdata->minx = gmin.x;
pdata->miny = gmin.y;
pdata->maxx = gmax.x;
pdata->maxy = gmax.y;
pview->setviewportbordervisibility(false);
pview->orbit(3.1415926535897932384626433, 0.0);
setbackgroundcolor(handle, pdata->nbackgroundcolor);
setupextents(handle);
return;
}
void setupextents(long handle)
{
if (((cinstancedata *)handle)->minx == ((cinstancedata *)handle)->maxx)
return;
if (((cinstancedata *)handle)->miny == ((cinstancedata *)handle)->maxy)
return;
odgepoint3d min(((cinstancedata *)handle)->minx, ((cinstancedata *)handle)->miny, 0.0);
odgepoint3d max(((cinstancedata *)handle)->maxx, ((cinstancedata *)handle)->maxy, 0.0);
odgeextents3d ext(min, max);
if (ext.isvalidextents() == false)
return;
odgsview* pview = ((cinstancedata *)handle)->pdevice->viewat(0);
odgepoint3d targ = pview->target();
odgevector3d dirfromtarg = pview->position() - targ;
// set target to center of the scene, keep view direction:
targ = ext.minpoint() + (ext.maxpoint() - ext.minpoint()) / 2.0;
if(pview->isfrontclipped() || pview->isbackclipped())
{
// keep distance from target to front & back planes
targ = targ.orthoproject(odgeplane(pview->target(), dirfromtarg));
}
// world extents to view cs:
ext.transformby(pview->viewingmatrix());
double fw = ext.maxpoint().x - ext.minpoint().x;
double fh = ext.maxpoint().y - ext.minpoint().y;
pview->setview(targ + dirfromtarg, targ, pview->upvector(), fw, fh);
}
thank you
attached files