Quick PDF Library - PDF SDK Community Forum

I need help - I can help : How to draw hatches

Fri, 03 Feb 2012 20:18:11 +0000

Author: edvoigt
Subject: How to draw hatches
Posted: 03 Feb 12 at 8:18PM

Hi,

there is something more to say. Because hatch or not hatch is a question of orientation.

My first example shows a normal drawn box and for clipping a path consisting of a circle and a hatch-box in it. Here the source:
QP.SetOrigin(0); // Bottomleft
QP.SetMeasurementUnits(1); // Millimeter
QP.SetPageDimensions(210, 297);

QP.SetLineWidth(0.1);
QP.SetLineColor(1, 0, 0);
QP.SetFillColor(1, 1, 0);
x0 := 25; x1 := 175;
y0 := 170; y1 := 270;
r := 70;
// 1. draw without clipping
QP.DrawBox(x0, y1, x1-x0, y1-y0, 1);
QP.DrawCircle((x0+x1)/2, y1-r, r, 0);

QP.SaveState; // for later use without clipping
// 2. define clipping path
QP.StartPath((x0+x1)/2, y1);
QP.AddArcToPath((x0+x1)/2, y1-r, 360); // the "normal" path for clipping
// 3. hatch-box-building
// hatch or not hatch is a question of orientation
QP.MovePath(x0+20, y0+75); // upper left corner
QP.AddLineToPath(x0+20, y0+50); // lower left
QP.AddLineToPath(x0+50, y0+50); // lower right
QP.AddLineToPath(x0+50, y0+75); // upper right
QP.AddLineToPath(x0+20, y0+75); // close hatch, important!
QP.SetClippingPath;
// 4. draw clipped things
// it will be drawn only inside the first circle and outside our hatchbox
QP.DrawBox(x0, y1, x1-x0, y1-y0, 0);
for i:=0 to 52 do QP.DrawLine(x1-i*5, y0, x1, y0+i*5);
QP.SetFillColor(0, 1, 0);
QP.DrawCircle(x0+50, y0+75, 10, 2);

QP.LoadState; // stop clipping from here

QP.SetLineColor(0, 0, 0);
QP.DrawLine(x0, y0, (x0+x1)/2, y1);

The second example is more interessting. Using four lines two triangles are builded, but only one of them becomes to be hatch.

That's so because of orientation during AddLineToPath-sequence.

Wandering from P1 over P2 to P3 upper triangle is ever on your right side. But the other Triangle is on the way from P3 over P4 to P1 on left side. Areas on right side are are parts of the path, but areas on left side dont't belong to path, they are hatches.

Source for this:
x0 := 100; y1 := y0-50; y0 := 20; r := 30;
QP.SaveState; // for later use without clipping
QP.StartPath(x0-r-5, y1+5);
//first a box as clipping area
QP.AddLineToPath(x0+2*r, y1);
QP.AddLineToPath(x0+2*r, y0-1);
QP.AddLineToPath(x0-r, y0-1);
QP.AddLineToPath(x0-r, y1);
// and now a special kind of half hatch
QP.MovePath(x0, y1);
QP.AddLineToPath(x0+r, y1);
QP.AddLineToPath(x0-r, y0);
QP.AddLineToPath(x0+r, y0);
QP.AddLineToPath(x0, y1);
QP.SetClippingPath;
QP.DrawBox(x0-r, y1, 2*r, y1-y0, 1);
// show hatch construction
QP.SetLineColor(0, 0, 0);
QP.SetLineWidth(1.0);
QP.DrawLine(x0, y1, x0+r, y1); // show the contour
QP.DrawLine(x0+r, y1, x0-r, y0);
QP.DrawLine(x0-r, y0, x0+r, y0);
QP.DrawLine(x0+r, y0, x0, y1);

QP.LoadState; // stop clipping now again
QP.DrawText(x0, y1+2, 'P1');
QP.DrawText(x0+r, y1+2, 'P2');
QP.DrawText(x0-r, y0-5, 'P3');
QP.DrawText(x0+r, y0-5, 'P4');

Cheers,
Werner

Edited by edvoigt - Yesterday at 8:20PM

General Discussion : Looking to add PDF417 2D barcode image to PDF

Fri, 03 Feb 2012 17:59:03 +0000

Author: Carneno
Subject: Looking to add PDF417 2D barcode image to PDF
Posted: 03 Feb 12 at 5:59PM

This is excellent news!!!

Thanks very much.

Keep up the good work for an excellent product.

Tony

I need help - I can help : OpenEdge Progress

Fri, 03 Feb 2012 14:22:57 +0000

Author: thrash
Subject: OpenEdge Progress
Posted: 03 Feb 12 at 2:22PM

Hi,

is it possible to use this great library in OpenEdge (vers. 10.2A) as EXTERNAL library?

I am trying to call functions from library but no chance.

&SCOP DLL 'QUICKPDFDLL.DLL'

PROCEDURE QuickPDFUnlockKey EXTERNAL {&DLL} :
DEF INPUT PARAM LicenceKey AS CHAR.
DEF RETURN PARAM iRetValue AS LONG.
END PROCEDURE.

DEF VAR i AS INT NO-UNDO.

RUN QuickPDFUnlockKey (INPUT , OUTPUT i).

Any ideas? please.

General Discussion : Looking to add PDF417 2D barcode image to PDF

Fri, 03 Feb 2012 11:24:34 +0000

Author: AndrewC
Subject: Looking to add PDF417 2D barcode image to PDF
Posted: 03 Feb 12 at 11:24AM

PDF 417 support was added to the 8.11 release.

http://www.quickpdflibrary.com/help/quickpdf/DrawPDF417Symbol.php

Andrew.

General Discussion : Looking to add PDF417 2D barcode image to PDF

Thu, 02 Feb 2012 15:03:37 +0000

Author: zacbro
Subject: Looking to add PDF417 2D barcode image to PDF
Posted: 02 Feb 12 at 3:03PM

i've no idea about your issue.

there is a pdf417 2D barcode for .net that may be helpful!

I need help - I can help : How to draw hatches

Thu, 02 Feb 2012 13:58:03 +0000

Author: kaiken1987
Subject: How to draw hatches
Posted: 02 Feb 12 at 1:58PM

Thank you that worked for me very well.

I need help - I can help : Imposing PDF

Thu, 02 Feb 2012 13:46:06 +0000

Author: Barnabe42
Subject: Imposing PDF
Posted: 02 Feb 12 at 1:46PM

Thanks a lot, I was able to impose 3 pdfs into a single A0 pdf.

I need help - I can help : vb6 dll

Thu, 02 Feb 2012 08:08:28 +0000

Author: darkv
Subject: vb6 dll
Posted: 02 Feb 12 at 8:08AM

Using LoadLibrary allows using the dll without registering (except if the loadlib first invocation registers in background)

The only constraint is to know where the dll is stored

I need help - I can help : How to add rich media for pdf file ??

Thu, 02 Feb 2012 07:50:28 +0000

Author: trungdtdev
Subject: How to add rich media for pdf file ??
Posted: 02 Feb 12 at 7:50AM

Is Quick PDF library supports Function groups add rich media like Acrobat X Pro ???

Edited by trungdtdev - 02 Feb 12 at 7:53AM

I need help - I can help : How to Extract or Convert page PDF to HTML

Thu, 02 Feb 2012 07:45:50 +0000

Author: trungdtdev
Subject: How to Extract or Convert page PDF to HTML
Posted: 02 Feb 12 at 7:45AM

Thanks !

But i use quickpdf for build my tools convert , create , edit PDF file