johnf wrote:
> ....
> Ed and Paul are programmers and by definition are lazy (we all are). So they
> have created short cuts for many of the things that you'll do daily while
> programming with Dabo. There are many so I'll only show two and let you
> explore/find the others for yourself. The first deals with sizers. Recall
> that when I'm appending to a sizer I have pass two parameters as in:
>
Note that the entire documentation of object creation ways is missing
in the api docs.
This is one of the worst things of the current api docs.
> Vsizer.append(dabo.ui.dButton(self, Caption='Button'),1,'x')
> also written as
> Vsizer.append(dabo.ui.dButton(self, Caption='Button'), proportion=1, “expand”)
>
> You will type the last two parameters (proportion=1 , “expand”) often. Ed
> got
> tried of doing that and created a short cut:
>
> Vsizer.append1x(dabo.ui.dButton(self, Caption='Button')) simple right - note
> the "append1x".
>
> The second has to do with binding an event. In my code I did the following:
>
> ourButton=dabo.ui.dButton(self,RegID="selectButton",Caption= "...")
> ourButton.bindEvent(dEvents.Hit, self._openDialog)
> hs.append(ourButton,0)
>
> The easy way and all on one line is as follows:
> hs.append(dabo.ui.dButton(self,RegID="selectButton",Caption=
> "...",OnHit=self._openDialog),0)
>
> Notice I added “ OnHit=self._openDialog”. This does exactly what the other
> three lines do. When we get into using bizobjects we will use more short
> cuts. Just remember that short cuts are just that – short cuts for typing.
> They do not change the way the code works.
>
>
> The last question was how to fill the textbox with the filename selected in
> the file dialog. Here is the code:
> def _openDialog(self,evt):
import os
> # need to receive the evt (in this case a click or Hit)
> evt.stop()
> theDialog=dabo.ui.dFileDialog(self)
> theDialog.show()
> if sys.platform == 'win32':
> myseperator = "\\" # someone should post why I needed
> two slashes
> else:
> myseperator = "/"
>
myseperator = os.path.sep
> myReturnFileValue= theDialog.FileName
> myReturnDirectory = theDialog.Directory
>
> # recall “filename” is the RegID of the textbox
> self.filename.Value= myReturnDirectory + myseperator +
> myReturnFileValue
>
Nice done John.
People new to Dabo will appreciate these tutorials very much.
Hopefully your posts will get included into the wiki later.
Uwe
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