phatch-dev team mailing list archive

[Nadia Alramli <nadiana@xxxxxxxxx>]

Hi,

This was a tough one, but I hope I succeeded. Now it is possible to
> show/hide fields conditionally. The method is very simple. Just add a
> get_relevant_field_labels() method to the Action. It is very important
> that the list of labels has EXACTLY the same order as defined in the
> interface method.
> I've implemented for these actions already:
> modified phatch/actions/color_to_alpha.py
> modified phatch/actions/crop.py
> modified phatch/actions/save.py
> modified phatch/actions/watermark.py

Thanks for doing this! this feature is very important for usability.


> Try them out and see if you can find any bugs! Note that the update
> will only take place after the field lost focus by clicking somewhere
> else or moving your mouse away over the toolbar.

I find this a bit confusing. Is there a technical reason to only change when
losing focus?


>
> This opens a lot of nice possibilities. Please go through the actions
> and see which ones could profit from this. From now on there should
> not any field be shown which is not relevant. This means that for some
> actions we need to add a ChoiceField which shows/hide the other
> fields. This is for example the case for the rounded corners action.
> It also might allow for more actions to add extra options.
>
> Nadia, the crop action still need some (important) work. I added to
> the white board of the blueprint:
> https://blueprints.launchpad.net/phatch/+spec/crop-action

No problem, check the attached action :)

Best Regards,
Nadia


>
>
> Best regards,
>
> Stani
>
> --
> Phatch Photo Batch Processor - http://photobatch.stani.be
> SPE Python IDE - http://pythonide.stani.be
>
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# Phatch - Photo Batch Processor
# Copyright (C) 2007-2008 www.stani.be
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see http://www.gnu.org/licenses/
#
# Phatch recommends SPE (http://pythonide.stani.be) for editing python files.

# Embedded icon is taken from www.openclipart.org (public domain)

from core import models
from core.translation import _t,new

OPTIONS = [
    _t('Auto'),
    _t('All'),
    _t('Custom')
]
#---PIL
def init():
    global Image, ImageOps
    import Image, ImageOps
    
def crop(image, crop=False, all=0, left=0, right=0, top=0, bottom=0):
    if crop == OPTIONS[0]:
        if image.mode == 'RGBA':
            box = image.split()[3].getbbox()
        else:
            box = image.getbbox()
        image = image.crop(box)
    elif crop == OPTIONS[1]:
        image = ImageOps.crop(image, border=all)
    else:
        w, h = image.size
        box = (
            left,
            top,
            w - right,
            h - bottom,
        )
        image = image.crop(box)
    return image

CHOICES = ['0', '1', '2', '5', '10', '20']

#---Phatch
class Action(models.Action):
    label       = _t('Crop')
    author      = 'Nadia Alramli'
    email       = 'mail@xxxxxxxxxxx'
    init        = staticmethod(init)
    pil         = staticmethod(crop)
    version     = '0.1'
    tags        = [_t('size'),_t('border')]
    update_size = True
    __doc__     = _t('Crop the image')
    
    def interface(self,fields):
        fields[_t('Crop')]   = self.ChoiceField(OPTIONS[0], choices=OPTIONS)
        fields[_t('All')]    = self.PixelField('1px', choices=CHOICES)
        fields[_t('Left')]   = self.PixelField('0px', choices=CHOICES)
        fields[_t('Right')]  = self.PixelField('0px', choices=CHOICES)
        fields[_t('Top')]    = self.PixelField('0px', choices=CHOICES)
        fields[_t('Bottom')] = self.PixelField('0px', choices=CHOICES)

    def values(self, info):
        #pixel fields
        width, height   = info[new('Pil','Size')]
        # pass absolute reference for relative pixel values such as %
        return super(Action, self).values(info, pixel_fields={
            'All'   :(width+height) / 2,
            'Left'  : width,
            'Right' : width,
            'Top'   : height,
            'Bottom': height,
        })

    def get_relevant_field_labels(self):
        """If this method is present, Phatch will only show relevant
        fields. 
        
        :returns: list of the field labels which are relevant
        :rtype: list of strings
        
        .. note:: 
        
            It is very important that the list of labels has EXACTLY
            the same order as defined in the interface method.
        """
        relevant = ['Crop']
        if self.get_field_string('Crop') == OPTIONS[1]:
            relevant.extend(
                ['All']
            )
        elif self.get_field_string('Crop') == OPTIONS[2]:
            relevant.extend(
                ['Top','Left','Bottom','Right']
            )
        return relevant
    
    icon = \
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