[Pythoncard-users] command events in textIndexer

[Kevin A. <al...@se...>]

In order to increase the usefulness of the textIndexer as a testing ground
for the PythonCard prototype I used command events for all of the menu
items. Rowland added command events quite a while ago, but this is the first
time I have used them. Since we haven't really talked about the 'command'
attribute before I thought I would show what it looks like by comparing
equivalent functionality in searchexplorer and textIndexer.

searchexplorer.rsrc.py
    { 'type':'MenuItem',
      'name':'menuEditCopy',
      'label':'&Copy\tCtrl-C'},

searchexplorer.py
    def on_menuEditCopy_select(self, menu, event):
        widget = self.findFocus()
        if hasattr(widget, 'editable') and widget.canCopy():
            widget.copy()

textIndexer.rsrc.py
    { 'type':'MenuItem',
      'name':'menuEditCopy',
      'label':'&Copy\tCtrl-C',
      'command':'editCopy'},

textIndexer.py
    def on_editCopy_command(self, menu, event):
        widget = self.findFocus()
        if hasattr(widget, 'editable') and widget.canCopy():
            widget.copy()

As you can see there isn't much to it. Any widget can have an associated
command event, so a button could also be tied to 'editCopy'. Part of the
reason for doing command events is that you can disable a command and then
it will be disabled for all associated menus and widgets. Rowland will have
to go into more detail when he has a chance.

ka
---
Kevin Altis
al...@se...