controls/CustomIntCtrl.py
author Edouard Tisserant
Fri, 28 Feb 2020 16:09:21 +0100
branchsvghmi
changeset 2844 eee5dcd9fc92
parent 1881 091005ec69c4
child 3750 f62625418bff
permissions -rw-r--r--
SVGHMI: detachable and discardable elements sets, Reworked geometric intersection, toward more accurate page content detection.

Moved page's widget/element dependency crawling functions so that it is possible to compute a global detachable and discardable elements sets.
Reworked geometric intersection detection logic to distinguish ovelapping and inclusion.
Goal is to include englobing and overlapping graphical elements, but not groups (would then include everything around...). Intermediate commit, to be continued.
#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2017: Andrey Skvortsov
#
# See COPYING file for copyrights details.
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


from __future__ import absolute_import
import wx
import wx.lib.intctrl


class CustomIntUpdatedEvent(wx.PyCommandEvent):
    def __init__(self, id, value=0, object=None):
        wx.PyCommandEvent.__init__(self, CustomIntCtrl.wxEVT_COMMAND_CUSTOM_INT_UPDATED, id)

        self.__value = value
        self.SetEventObject(object)

    def GetValue(self):
        """Retrieve the value of the control at the time
        this event was generated."""
        return self.__value


class CustomIntCtrl(wx.lib.intctrl.IntCtrl):
    """
    This class provides a control that takes and returns long as
    value, and provides bounds support and optional value limiting.

    It handles entering negative numbers more user-friendly than
    original wx.lib.intctrl.IntCtrl.

    It applies limits as focus is changed to other control and
    sends event afterwards to signal that editing is done.
    """

    # Used to trap events indicating that the current
    # integer value of the control has been changed.
    wxEVT_COMMAND_CUSTOM_INT_UPDATED = wx.NewEventType()
    EVT_CUSTOM_INT = wx.PyEventBinder(wxEVT_COMMAND_CUSTOM_INT_UPDATED, 1)

    def __init__(self, *args, **kwargs):
        wx.lib.intctrl.IntCtrl.__init__(self, *args, **kwargs)
        self.Bind(wx.EVT_KILL_FOCUS, self.UpdateValue)
        self.SetLongAllowed(True)
        self.SetLimited(False)

    def GetValue(self):
        """
        Returns integer (long) value of the control,
        but handles entering negative numbers
        """
        s = wx.TextCtrl.GetValue(self)
        if s == '-':
            s = ''
        return self._fromGUI(s)

    def GetValueStr(self):
        """Returns string value of TextCtrl"""
        return wx.TextCtrl.GetValue(self)

    def UpdateValue(self, event):
        self.SetLimited(True)
        self.SetLimited(False)
        try:
            self.GetEventHandler().ProcessEvent(
                CustomIntUpdatedEvent(self.GetId(), self.GetValue(), self))
        except ValueError:
            return
        event.Skip()