yang686526

how to get the last used viewport of current layout
how to get the last used viewport of current layout
hi
i open a dwg file that have some paper model.
when i change to the paper model,
can i get the last used viewport of the paper model ?
i use the code below
odgsview *pview=m_pdevice->viewat(0);
odgepoint3d tag=pview->target();
double fieldwidth=pview->fieldwidth();
double fieldheight=pview->fieldheight();
to calc viewport,but it not work.
i always get the same viewport.
can anyone tell me why ?
last edited by yashu; 4th november 2004 at 01:23 amfff">.
maybe oddblayout::activeviewportid() will help?
sergey slezkin

quote:
originally posted by sergey slezkin
maybe oddblayout::activeviewportid() will help?
i use the code below:
pdatabase->setcurrentlayout(name);
pdwgcontext = odgicontextfordbdatabase::createobject();
m_pdevice = cdwgvectorizedevice::createobject();
pdwgcontext->setdatabase(pdatabase);
m_pdevice=oddbgsmanager::setupactivelayoutviews(m_ pdevice,pdwgcontext);
oddblayoutptr playout=getcurrentlayout();
oddbobjectid id=playout->activeviewportid();
oddbviewportptr pviewport=id.safeopenobject();
odgepoint3d tag=pviewport->viewtarget();
double fieldwidth=pviewport->width();
double fieldheight=pviewport->height();
but id is null,why ?
i also have another question.
i write the cdwgvectorizedevice inherit from dgsbasevectorizedevice,odgigeometrysimplifier and odrxdispatchimpl<>,
i set the background is black and when i find a entity whick color is the same with background color,i use inverse color to draw it,everything is ok.
when i change the layout to paper model,there is a paper whick color is white on the background,when i draw a entity which color is black,so i change it's colot to write,and draw a white entity to white paper,i can't see the entity again.
how can i avoid it ?
in paper mode,there is a big rectangle which color is white to be draw on topmost sometime. it cover everything.
how can i avoid it ?
last edited by yashu; 4th november 2004 at 05:48 pmfff">.

quote:
originally posted by yashu
oddbobjectid id=playout->activeviewportid();
but id is null,why ?
probably because this layout doesn't have any viewports (e.g. new layout or model space layout).
quote:
originally posted by yashu
i also have another question.
i write the cdwgvectorizedevice inherit from dgsbasevectorizedevice,odgigeometrysimplifier and odrxdispatchimpl<>,
i set the background is black and when i find a entity whick color is the same with background color,i use inverse color to draw it,everything is ok.
when i change the layout to paper model,there is a paper whick color is white on the background,when i draw a entity which color is black,so i change it's colot to write,and draw a white entity to white paper,i can't see the entity again.
how can i avoid it ?
odamfcapp uses palettes for rendering (see odamfcapp). there are two palettes in odamfcapp - one for "light" background, and one for "dark" background. in both palettes color 7 is "contrast color", it is black in white background palette, and it is white in dark background palette.
quote:
originally posted by yashu
in paper mode,there is a big rectangle which color is white to be draw on topmost sometime. it cover everything.
how can i avoid it ?
hmm... big white rectangle that is to be drawn on topmost... strange... can this problem be reproduced in odamfcapp sample application?
sincerely yours,
george udov