The sample code below, (function in the attached project) shows how plot all the layouts in batch mode using the ActiveX API in C++.
The key points to batch plot layouts are:
1) Set the number of layouts be plotted using the method StartBatchMode() of the IAcadPlot object.
2) Preparing a variant array of BSTRs having the names of the layouts to be plotted and then pass it as argument to SetLayoutsToPlot() method.
3) Finally to plot, use PlotToDevice() method.
//use MFC to test this code
#import "acax19enu.tlb" raw_interfaces_only no_namespace
void fBatchPlotLayouts()
{
try
{
//get the AutoCAD application
IAcadApplicationPtr pApp = NULL;
pApp = acedGetAcadWinApp()->GetIDispatch(TRUE);
//get the Active Document
IAcadDocumentPtr pDoc = NULL;
pApp->get_ActiveDocument(&pDoc);
IAcadLayoutsPtr pLayOuts;
IAcadLayoutPtr pLayOut;
long mNumberOflayouts;
//get the layouts collection and the number of layouts
pDoc->get_Layouts(&pLayOuts);
pLayOuts->get_Count(&mNumberOflayouts);
//create the variant array that will hold the layout names
VARIANT mLayArr;
SAFEARRAYBOUND mSAB;
mSAB.lLbound = 0;
mSAB.cElements = mNumberOflayouts;
VariantInit(&mLayArr);
mLayArr.vt = VT_ARRAY | VT_BSTR;
mLayArr.parray = SafeArrayCreate(VT_BSTR,1,&mSAB);
//populate the variant array
long mCtr;
//note that array here has zero based index
for(mCtr = 0; mCtr < mNumberOflayouts; mCtr ++)
{
pLayOuts->Item(_variant_t(mCtr), &pLayOut);
BSTR strName;
pLayOut->get_Name(&strName);
SafeArrayPutElement(mLayArr.parray, &mCtr, strName);
}
//print the layout names that are being plotted
BSTR bstrName;
acutPrintf(_T("\nLayouts to be plotted:"));
for(mCtr = 0; mCtr < mNumberOflayouts;mCtr ++)
{
SafeArrayGetElement(mLayArr.parray,&mCtr,&bstrName);
acutPrintf(_T("\n%s"),(TCHAR*)(_bstr_t)bstrName);
}
acutPrintf(_T("\nPlotting started…\n"));
//plot the layouts
IAcadPlotPtr pPlot;
pDoc->get_Plot(&pPlot);
//set the number of plots and error mode to quiet
pPlot->put_NumberOfCopies(1);
pPlot->put_QuietErrorMode(VARIANT_TRUE);
//number of layouts to be plotted
pPlot->StartBatchMode(mNumberOflayouts);
//set the layouts to plot
pPlot->SetLayoutsToPlot(mLayArr);
VARIANT_BOOL returnBool;
pPlot->PlotToDevice(_variant_t("DWF6 ePlot.pc3"), &returnBool);
//clean up
VariantClear(&mLayArr);
}
catch (_com_error &e)
{
acutPrintf(
_T("\nError while batch plotting. %s"),e.ErrorMessage());
}
}
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