dialogs/FBDBlockDialog.py
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 28 Sep 2018 19:06:28 +0300
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# This file is part of Beremiz, a Integrated Development Environment for
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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
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#
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
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# Copyright (C) 2017: Andrey Skvortsov <andrej.skvortzov@gmail.com>
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#
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# See COPYING file for copyrights details.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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from __future__ import absolute_import
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import re
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import wx
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from graphics.FBD_Objects import FBD_Block
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from controls.LibraryPanel import LibraryPanel
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from dialogs.BlockPreviewDialog import BlockPreviewDialog
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# -------------------------------------------------------------------------------
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#                                    Helpers
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# -------------------------------------------------------------------------------
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def GetBlockTypeDefaultNameModel(blocktype):
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    return re.compile("%s[0-9]+" % blocktype if blocktype is not None else ".*")
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# -------------------------------------------------------------------------------
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#                         Set Block Parameters Dialog
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# -------------------------------------------------------------------------------
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class FBDBlockDialog(BlockPreviewDialog):
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    """
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    Class that implements a dialog for defining parameters of a FBD block graphic
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    element
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    """
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    def __init__(self, parent, controller, tagname):
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        """
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        Constructor
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        @param parent: Parent wx.Window of dialog for modal
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        @param controller: Reference to project controller
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        @param tagname: Tagname of project POU edited
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        """
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        BlockPreviewDialog.__init__(self, parent, controller, tagname,
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                                    title=_('Block Properties'))
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        # Init common sizers
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        self._init_sizers(2, 0, 1, 0, 3, 2)
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        # Create static box around library panel
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        type_staticbox = wx.StaticBox(self, label=_('Type:'))
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        left_staticboxsizer = wx.StaticBoxSizer(type_staticbox, wx.VERTICAL)
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        self.LeftGridSizer.AddSizer(left_staticboxsizer, border=5, flag=wx.GROW)
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        # Create Library panel and add it to static box
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        self.LibraryPanel = LibraryPanel(self)
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        self.LibraryPanel.SetInitialSize(wx.Size(-1, 400))
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        # Set function to call when selection in Library panel changed
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        setattr(self.LibraryPanel, "_OnTreeItemSelected",
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                self.OnLibraryTreeItemSelected)
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        left_staticboxsizer.AddWindow(self.LibraryPanel, 1, border=5,
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                                      flag=wx.GROW | wx.TOP)
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        # Create sizer for other block parameters
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        top_right_gridsizer = wx.FlexGridSizer(cols=2, hgap=0, rows=4, vgap=5)
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        top_right_gridsizer.AddGrowableCol(1)
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        self.RightGridSizer.AddSizer(top_right_gridsizer, flag=wx.GROW)
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        # Create label for block name
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        name_label = wx.StaticText(self, label=_('Name:'))
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        top_right_gridsizer.AddWindow(name_label,
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                                      flag=wx.ALIGN_CENTER_VERTICAL)
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        # Create text control for defining block name
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        self.BlockName = wx.TextCtrl(self)
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        self.Bind(wx.EVT_TEXT, self.OnNameChanged, self.BlockName)
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        top_right_gridsizer.AddWindow(self.BlockName, flag=wx.GROW)
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        # Create label for extended block input number
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        inputs_label = wx.StaticText(self, label=_('Inputs:'))
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        top_right_gridsizer.AddWindow(inputs_label,
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                                      flag=wx.ALIGN_CENTER_VERTICAL)
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        # Create spin control for defining extended block input number
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        self.Inputs = wx.SpinCtrl(self, min=2, max=20,
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                                  style=wx.SP_ARROW_KEYS)
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        self.Bind(wx.EVT_SPINCTRL, self.OnInputsChanged, self.Inputs)
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        top_right_gridsizer.AddWindow(self.Inputs, flag=wx.GROW)
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        # Create label for block execution order
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        execution_order_label = wx.StaticText(self,
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                                              label=_('Execution Order:'))
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        top_right_gridsizer.AddWindow(execution_order_label,
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                                      flag=wx.ALIGN_CENTER_VERTICAL)
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        # Create spin control for defining block execution order
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        self.ExecutionOrder = wx.SpinCtrl(self, min=0, style=wx.SP_ARROW_KEYS)
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        self.Bind(wx.EVT_SPINCTRL, self.OnExecutionOrderChanged,
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                  self.ExecutionOrder)
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        top_right_gridsizer.AddWindow(self.ExecutionOrder, flag=wx.GROW)
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        # Create label for block execution control
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        execution_control_label = wx.StaticText(self,
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                                                label=_('Execution Control:'))
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        top_right_gridsizer.AddWindow(execution_control_label,
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                                      flag=wx.ALIGN_CENTER_VERTICAL)
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        # Create check box to enable block execution control
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        self.ExecutionControl = wx.CheckBox(self)
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        self.Bind(wx.EVT_CHECKBOX, self.OnExecutionOrderChanged,
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                  self.ExecutionControl)
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        top_right_gridsizer.AddWindow(self.ExecutionControl, flag=wx.GROW)
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        # Add preview panel and associated label to sizers
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        self.RightGridSizer.AddWindow(self.PreviewLabel, flag=wx.GROW)
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        self.RightGridSizer.AddWindow(self.Preview, flag=wx.GROW)
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        # Add buttons sizer to sizers
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        self.MainSizer.AddSizer(self.ButtonSizer, border=20,
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                                flag=wx.ALIGN_RIGHT | wx.BOTTOM | wx.LEFT | wx.RIGHT)
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        # Dictionary containing correspondence between parameter exchanged and
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        # control to fill with parameter value
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        self.ParamsControl = {
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            "extension": self.Inputs,
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            "executionOrder": self.ExecutionOrder,
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            "executionControl": self.ExecutionControl
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        }
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        # Init controls value and sensibility
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        self.BlockName.SetValue("")
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        self.BlockName.Enable(False)
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        self.Inputs.Enable(False)
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        # Variable containing last name typed
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        self.CurrentBlockName = None
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        # Refresh Library panel values
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        self.LibraryPanel.SetBlockList(controller.GetBlockTypes(tagname))
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        self.Fit()
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        self.LibraryPanel.SetFocus()
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    def SetValues(self, values):
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        """
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        Set default block parameters
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        @param values: Block parameters values
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        """
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        # Extract block type defined in parameters
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        blocktype = values.get("type", None)
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        # Select block type in library panel
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        if blocktype is not None:
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            self.LibraryPanel.SelectTreeItem(blocktype,
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                                             values.get("inputs", None))
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        # Define regular expression for determine if block name is block
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        # default name
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        default_name_model = GetBlockTypeDefaultNameModel(blocktype)
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        # For each parameters defined, set corresponding control value
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        for name, value in values.items():
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            # Parameter is block name
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            if name == "name":
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                if value != "":
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                    # Set default graphic element name for testing
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                    self.DefaultElementName = value
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                    # Test if block name is type default block name and save
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                    # block name if not (name have been typed by user)
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                    if default_name_model.match(value) is None:
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                        self.CurrentBlockName = value
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                self.BlockName.ChangeValue(value)
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            # Set value of other controls
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            else:
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                control = self.ParamsControl.get(name, None)
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                if control is not None:
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                    control.SetValue(value)
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        # Refresh preview panel
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        self.RefreshPreview()
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    def GetValues(self):
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        """
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        Return block parameters defined in dialog
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        @return: {parameter_name: parameter_value,...}
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        """
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        values = self.LibraryPanel.GetSelectedBlock()
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        if self.BlockName.IsEnabled() and self.BlockName.GetValue() != "":
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            values["name"] = self.BlockName.GetValue()
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        values["width"], values["height"] = self.Element.GetSize()
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        values.update({
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            name: control.GetValue()
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            for name, control in self.ParamsControl.iteritems()})
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        return values
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    def OnOK(self, event):
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        """
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        Called when dialog OK button is pressed
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        Test if parameters defined are valid
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        @param event: wx.Event from OK button
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        """
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        message = None
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        # Get block type selected
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        selected = self.LibraryPanel.GetSelectedBlock()
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        # Get block type name and if block is a function block
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        block_name = self.BlockName.GetValue()
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        name_enabled = self.BlockName.IsEnabled()
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        # Test that a type has been selected for block
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        if selected is None:
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            message = _("Form isn't complete. Valid block type must be selected!")
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        # Test, if block is a function block, that a name have been defined
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        elif name_enabled and block_name == "":
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            message = _("Form isn't complete. Name must be filled!")
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        # Show error message if an error is detected
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        if message is not None:
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            self.ShowErrorMessage(message)
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        # Test block name validity if necessary
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        elif not name_enabled or self.TestElementName(block_name):
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            # Call BlockPreviewDialog function
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            BlockPreviewDialog.OnOK(self, event)
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    def OnLibraryTreeItemSelected(self, event):
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        """
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        Called when block type selected in library panel
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        @param event: wx.TreeEvent
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        """
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        # Get type selected in library panel
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        values = self.LibraryPanel.GetSelectedBlock()
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        # Get block type informations
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        blocktype = (self.Controller.GetBlockType(values["type"],
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                                                  values["inputs"])
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                     if values is not None else None)
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        # Set input number spin control according to block type informations
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        if blocktype is not None:
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            self.Inputs.SetValue(len(blocktype["inputs"]))
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            self.Inputs.Enable(blocktype["extensible"])
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        else:
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            self.Inputs.SetValue(2)
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            self.Inputs.Enable(False)
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        # Update block name with default value if block type is a function and
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        # current block name wasn't typed by user
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        if blocktype is not None and blocktype["type"] != "function":
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            self.BlockName.Enable(True)
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            if self.CurrentBlockName is None:
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                # Generate new block name according to block type, taking
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                # default element name if it was already a default name for this
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                # block type
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                default_name_model = GetBlockTypeDefaultNameModel(values["type"])
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                block_name = (
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                    self.DefaultElementName
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                    if (self.DefaultElementName is not None and
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                        default_name_model.match(self.DefaultElementName))
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                    else self.Controller.GenerateNewName(
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                        self.TagName, None, values["type"]+"%d", 0))
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            else:
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                block_name = self.CurrentBlockName
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            self.BlockName.ChangeValue(block_name)
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        else:
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            self.BlockName.Enable(False)
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            self.BlockName.ChangeValue("")
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        # Refresh preview panel
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        self.RefreshPreview()
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    def OnNameChanged(self, event):
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        """
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        Called when block name value changed
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        @param event: wx.TextEvent
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        """
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        if self.BlockName.IsEnabled():
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            # Save block name typed by user
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            self.CurrentBlockName = self.BlockName.GetValue()
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            self.RefreshPreview()
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        event.Skip()
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    def OnInputsChanged(self, event):
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        """
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        Called when block inputs number changed
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        @param event: wx.SpinEvent
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        """
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        if self.Inputs.IsEnabled():
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            self.RefreshPreview()
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        event.Skip()
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    def OnExecutionOrderChanged(self, event):
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        """
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        Called when block execution order value changed
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        @param event: wx.SpinEvent
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        """
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        self.RefreshPreview()
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        event.Skip()
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    def OnExecutionControlChanged(self, event):
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        """
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        Called when block execution control value changed
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        @param event: wx.SpinEvent
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        """
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        self.RefreshPreview()
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        event.Skip()
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    def RefreshPreview(self):
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        """
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        Refresh preview panel of graphic element
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        Override BlockPreviewDialog function
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        """
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        # Get type selected in library panel
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        values = self.LibraryPanel.GetSelectedBlock()
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        # If a block type is selected in library panel
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        if values is not None:
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            # Set graphic element displayed, creating a FBD block element
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            self.Element = FBD_Block(
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                self.Preview, values["type"],
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                (self.BlockName.GetValue() if self.BlockName.IsEnabled() else ""),
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                extension=self.Inputs.GetValue(),
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                inputs=values["inputs"],
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                executionControl=self.ExecutionControl.GetValue(),
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                executionOrder=self.ExecutionOrder.GetValue())
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        # Reset graphic element displayed
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        else:
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            self.Element = None
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        # Call BlockPreviewDialog function
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        BlockPreviewDialog.RefreshPreview(self)