uRSSus: now with configuration dialog goodness!

2008-08-06 17:12

I felt that a "user-friendly" configuration dialog for uRSSus was not a good way to spend effort, because I expect options to change often for a while, and I didn't want an outdated dialog, either. The solution? Autogenerate a mediocre configuration dialog!

First, define what options uRSSus supports (Update: suggestion by Alejandro Cura, using tuples works much better!):

options = (
  ('ui',
    (
      ('alwaysShowFeed',  ('bool', False, "Always show a link to the post's feed when diplaying a post")),
      ('hideOnTrayClick', ('bool', True, "Hide the main window when clicking on the tray icon")),
    )
  ),
  ('options',
    (
      ('defaultRefresh'      ,  ('int', 1800, "How often feeds should be refreshed by default (in seconds).", 300, None )),
      ('maxPostsDisplayed'   ,  ('int', 1000, "Limit the display to this many posts. If set too high, opening 'All Feeds' may take forever", 0, None)),
      ('defaultExpiration'   ,  ('int',    7, "How long should articles be kept by default. (In days)", 0, 9999)),
    )
  ),
  ('twitter',
    (
      ('username',  ('string', None, 'Your Twitter user name.' )),
      ('password',  ('password', None, 'Your Twitter password.' )),
    )
  )
)

Then a little magic, and this comes out:

How magic? This magic:

class ConfigDialog(QtGui.QDialog):
  def __init__(self, parent):
    QtGui.QDialog.__init__(self, parent)
    # Set up the UI from designer
    self.ui=UI_ConfigDialog()
    self.ui.setupUi(self)
    pages=[]
    sections=[]
    self.values={}

    for sectionName, options in config.options:
      # Create a page widget/layout for this section:
      page=QtGui.QScrollArea()
      layout=QtGui.QGridLayout()
      row=-2
      for optionName, definition in options:
        row+=2
        if definition[0]=='bool':
          cb=QtGui.QCheckBox(optionName)
          cb.setChecked(config.getValue(sectionName, optionName, definition[1]))
          layout.addWidget(cb, row, 0, 1, 2)
          self.values[sectionName+'/'+optionName]=[cb, lambda(cb): cb.isChecked()]


        elif definition[0]=='int':
          label=QtGui.QLabel(optionName+":")
          label.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignVCenter)
          spin=QtGui.QSpinBox()
          if definition[3] is not None:
            spin.setMinimum(definition[3])
          else:
            spin.setMinimum(-99999)
          if definition[4] is not None:
            spin.setMaximum(definition[4])
          else:
            spin.setMaximum(99999)
          spin.setValue(config.getValue(sectionName, optionName, definition[1]))
          layout.addWidget(label, row, 0, 1, 1)
          layout.addWidget(spin, row, 1, 1, 1)
          self.values[sectionName+'/'+optionName]=[spin, lambda(spin): spin.value()]

        elif definition[0]=='string':
          label=QtGui.QLabel(optionName+":")
          label.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignVCenter)
          text=QtGui.QLineEdit()
          text.setText(config.getValue(sectionName, optionName, definition[1]))
          layout.addWidget(label, row, 0, 1, 1)
          layout.addWidget(text, row, 1, 1, 1)
          self.values[sectionName+'/'+optionName]=[text, lambda(text): unicode(text.text())]

        elif definition[0]=='password':
          label=QtGui.QLabel(optionName+":")
          label.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignVCenter)
          text=QtGui.QLineEdit()
          text.setEchoMode(QtGui.QLineEdit.Password)
          text.setText(config.getValue(sectionName, optionName, definition[1]))
          layout.addWidget(label, row, 0, 1, 1)
          layout.addWidget(text, row, 1, 1, 1)
          self.values[sectionName+'/'+optionName]=[text, lambda(text): unicode(text.text())]

        help=QtGui.QLabel(definition[2])
        help.setWordWrap(True)
        layout.addWidget(help, row, 2, 1, 1)
        separator=QtGui.QFrame()
        separator.setFrameStyle(QtGui.QFrame.HLine|QtGui.QFrame.Plain)
        layout.addWidget(separator, row+1, 0, 1, 3)
      page.setLayout(layout)
      pages.append(page)
      sections.append(sectionName)

    for page, name in zip(pages,sections) :
      # Make a tab out of it
      self.ui.tabs.addTab(page, name)
    self.ui.tabs.setCurrentIndex(1)
    self.ui.tabs.removeTab(0)

My first ever thing that I just don't see how it would work without a lambda ;-)

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