[reportlab-users] Issues related to setting parameters of graphs, lines, and rectangles, and they are not printing correctly

[Robin Becker]

On 03/12/2012 08:52, Andy Robinson wrote:
...........

> We have actually implemented 'screen only' buttons in some of our

> commercial solutions  (e.g. "Buy Now" buttons on a product factsheet,

> which make absolutely no sense when printed), but it's done in a

> completely separate drawing layer.   When Robin gets in, hopefully he

> can post a code snippet to do it.

......

We have used code like this to implement forms which appear differently in print.


Attached is an example script which creates a form, uses a non-printing version 
of the form and also one that is printed.


-- 
Robin Becker
-------------- next part --------------
from reportlab.lib.colors import toColor
def makeForm(canv,
        text='Hello Cruel World!',
        formName='dingo',
        width=100,height=30,
        fillColor0=toColor('pink'),
        fillColor1=toColor('red'),
        textColor=toColor('blue'),
        strokeWidth=1,
        strokeColor=toColor('green'),
        fontName='Helvetica',
        fontSize=12,
        baseline=7,
        x0=0,
        y0=0,
        ):
    hsw = strokeWidth*0.5
    if not canv.hasForm(formName):
        from reportlab.pdfbase.pdfmetrics import stringWidth
        canv.beginForm(formName,0,0,width+strokeWidth,height+strokeWidth)
        canv.setFillColor(fillColor0)
        canv.setStrokeColor(strokeColor)
        canv.setLineWidth(strokeWidth)
        canv.rect(hsw,hsw,width,height,fill=1,stroke=1)
        canv.setFillColor(fillColor1)
        canv.rect(2*strokeWidth,strokeWidth,width-2*strokeWidth,height-2*strokeWidth,fill=1,stroke=0)
        canv.setFillColor(textColor)
        sw = stringWidth(text,fontName,fontSize)
        swm = width-(2+hsw)*2
        if sw>=swm: fontSize *= float(swm)/sw
        canv.setFont(fontName,fontSize)
        canv.drawCentredString(hsw+width/2.,baseline+hsw,text)
        canv.endForm()
        return formName

def nAppearance(canv,formName,
        width=100,height=30,
        strokeWidth=1,
        x0=0,
        y0=0,
        ):
    from reportlab.pdfbase.pdfdoc import PDFDictionary, PDFObjectReference
    hsw = strokeWidth*0.5
    rect = (x0-hsw,y0-hsw,x0+width+hsw,y0+height+hsw)
    canv.freeTextAnnotation('','()',rect,relative=1,
    AP=PDFDictionary(dict(N=PDFObjectReference(canv._doc.getXObjectName(formName)))))
    canv._formsinuse.append(formName)


if __name__=='__main__':
    from reportlab import rl_config
    rl_config.pageCompression = 0
    rl_config.invariant = 1
    from reportlab.pdfgen.canvas import Canvas
    from reportlab.pdfbase.ttfonts import TTFont
    from reportlab.pdfbase.pdfmetrics import registerFont
    canv = Canvas('test-freetext.pdf')
    formName = makeForm(canv)

    #this version of the form won't print
    canv.saveState()
    canv.translate(72,72)
    nAppearance(canv,formName)
    canv.drawString(105,0,'Sample of the N Appearance Stream Form XObject')
    canv.restoreState()


    #this version will
    canv.saveState()
    canv.translate(72,144)
    canv.doForm(formName)
    canv.drawString(105,0,'Sample of the standard Form XObject')
    canv.restoreState()

    canv.showPage()
    canv.save()