ReportBuilder custom component & wPDF

1. offizieller Beitrag

    Hi,
    I have a custom component for ReportBuilder 10 that basically works the same as a TppShape but produces a polygon (to display a blunt corner rectangle). It current implements the Printer & Screen devices - which is not enough to get wPDF to use it. I've been told by support to produce a MetaFile for it and that it would then print - but I'm having trouble finding any sort of example of this. Has anyone created a custom component for RB that renders in PDF with wPDF and would be willing to provide me some example code for programming the device?

    Thanks,
    Nick Hustak

    Hi, yes there's been some confusion on my end but I resolved it (thanks Julian!) My issue is definitely with wPDF - I confirmed this by checked the PDF properties after generation (and making sure my test program doens't contain any other third party references)

    I was just hoping to maybe find someone that's ran into the issue and solved it already.

    It is using the canvas with the polygon command - my component is based upon some older code from a third party component so it's possible it's not responding to something as it should. It's a fairly simple drawing component (and a complete hack job on my part - I should have done more research). I'll post some embarassing code from it shortly.

    • Offizieller Beitrag

    Polygon is supported - per se.

    What can be problematic are difficult coordinate conversion or clipping. Since PDF cannot modify a clipping region (it can not include areas which were excluded before) it is required to build a propper stack in this case.

    This is done with SaveDC/RestoreDC. So instead of appling clipping and removing it later create a stack entry with SaveDC, set clipping and when done use RestoreDC.

    Julian

    Ok - the only issue I see right now is how to scale my units for the device. For the Printer I currently use:

    lBluntLowerRightH :=
    Trunc(ppFromMMThousandths(FBluntLowerRightH, utPrinterPixels, pprtHorizontal, LPrinter));

    Where LPrinter came from PrinterDevice.Printer

    What would I use for the PDF Device?

    Let me ask another question - I looked in the RB source code and there's a notation there about handling components that only write to the printer & screen (which is what mine is ). Normally wPDF would pick them up correctly?

    Thanks,
    Nick