[reportlab-users] get methods for properties

[Tim Roberts]

On Thu, 10 Jun 2004 13:07:15 -0500, Randall Smith <randall@tnr.cc> wrote:

>My comment is about getting properties.  Maybe I missed it, but I don't 
>see a clean way to grab some useful properties.  For example, line 
>width.  I wrote a flowable to draw a horizontal line.  I want to set the 
>line width and return it back to what it was before the flowable was 
>created.  Because _lineWidth starts with a _, I'm guessing this is a 
>semi-private variable and subject to change (not part of the API).  So 
>shouldn't canvas have an API attribute or call like canvas.lineWidth or 
>canvas.getLineWidth()?
>
>Here is code below:
>
>class HR(Flowable):
>...
>     def draw(self):
>         orig_linewidth = self.canv._lineWidth # my problem is here
>         self.canv.setLineWidth(height)
>         self.canv.line(0, 0, 100, 0)
>         self.canv.setLineWidth(orig_linewidth)
>  
>

The correct (and easy) way to do this is:

    def draw(self):
        self.canv.saveState()
        self.canv.setLineWidth(height)
        self.canv.setLotsOfOtherProperties()
        self.canv.line(0, 0, 100, 0)
        self.canv.restoreState()

-- 
- Tim Roberts, timr@probo.com
  Providenza & Boekelheide, Inc.