Debenu Quick PDF Library - PDF SDK Community Forum : About the ContentStream

Author: nieguizhi
Subject: 3244
Posted: 12 Jan 16 at 2:30AM

Hi professional:

I find that the below two pieces of code get the same results when I open the pdf file by the software of AI. why? I also get one layer, what is the function NewOptionalContentGroup means?

thank you. look forward to your reply.

int OCG1 = DPL.NewOptionalContentGroup(L"group1");

DPL.SelectPage(1);

DPL.SetOrigin(1);

int cs1 = DPL.NewContentStream();

DPL.SelectContentStream(cs1);

DPL.DrawText(100,100,L"CS1");

DPL.SetContentStreamOptional(OCG1);

DPL.SetOptionalContentGroupVisible(OCG1, 1);

int OCG2 = DPL.NewOptionalContentGroup(L"group2");

int cs2 = DPL.NewContentStream();

DPL.SelectContentStream(cs2);

DPL.DrawText(100, 200, L"CS2");

DPL.SetContentStreamOptional(OCG2);

DPL.SetOptionalContentGroupVisible(OCG2, 1);

DPL.SaveToFile(L"newLayer.pdf");

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int OCG1 = DPL.NewOptionalContentGroup(L"group1");

DPL.SelectPage(1);

DPL.SetOrigin(1);

int cs1 = DPL.NewContentStream();

DPL.SelectContentStream(cs1);

DPL.DrawText(100,100,L"CS1");

DPL.SetContentStreamOptional(OCG1);

DPL.SetOptionalContentGroupVisible(OCG1, 1);

int cs2 = DPL.NewContentStream();

DPL.SelectContentStream(cs2);

DPL.DrawText(100, 200, L"CS2");

DPL.SetContentStreamOptional(OCG1);

DPL.SetOptionalContentGroupVisible(OCG1, 1);

DPL.SaveToFile(L"newLayer.pdf");

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