dialogs/SFCTransitionDialog.py
author mjsousa
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permissions -rw-r--r--
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# -*- coding: utf-8 -*-
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#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor
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#based on the plcopen standard. 
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#
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#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
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#
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#See COPYING file for copyrights details.
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#
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#This library is free software; you can redistribute it and/or
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#modify it under the terms of the GNU General Public
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#License as published by the Free Software Foundation; either
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#version 2.1 of the License, or (at your option) any later version.
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#
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#This library 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 GNU
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#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
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#License along with this library; if not, write to the Free Software
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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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import wx
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from graphics.SFC_Objects import SFC_Transition
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from BlockPreviewDialog import BlockPreviewDialog
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#-------------------------------------------------------------------------------
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#                        Set Transition Parameters Dialog
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#-------------------------------------------------------------------------------
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"""
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Class that implements a dialog for defining parameters of a transition graphic
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element
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"""
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class SFCTransitionDialog(BlockPreviewDialog):
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    def __init__(self, parent, controller, tagname, connection=True):
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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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        @param connection: True if transition value can be defined by a
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        connection (default: True)
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        """
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        BlockPreviewDialog.__init__(self, parent, controller, tagname,
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              size=wx.Size(350, 300), title=_('Edit transition'))
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        # Init common sizers
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        self._init_sizers(2, 0, 8, None, 2, 1)
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        # Create label for transition type
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        type_label = wx.StaticText(self, label=_('Type:'))
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        self.LeftGridSizer.AddWindow(type_label, flag=wx.GROW)
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        # Create combo box for selecting reference value
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        reference = wx.ComboBox(self, style=wx.CB_READONLY)
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        reference.Append("")
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        for transition in controller.GetEditedElementTransitions(tagname):
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            reference.Append(transition)
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        self.Bind(wx.EVT_COMBOBOX, self.OnReferenceChanged, reference)
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        # Create Text control for defining inline value
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        inline = wx.TextCtrl(self)
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        self.Bind(wx.EVT_TEXT, self.OnInlineChanged, inline)
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        # Create radio buttons for selecting power rail type
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        self.TypeRadioButtons = {}
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        first = True
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        for type, label, control in [('reference', _('Reference'), reference),
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                                     ('inline', _('Inline'), inline),
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                                     ('connection', _('Connection'), None)]:
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            radio_button = wx.RadioButton(self, label=label, 
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                  style=(wx.RB_GROUP if first else 0))
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            radio_button.SetValue(first)
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            self.Bind(wx.EVT_RADIOBUTTON, self.OnTypeChanged, radio_button)
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            self.LeftGridSizer.AddWindow(radio_button, flag=wx.GROW)
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            if control is not None:
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                control.Enable(first)
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                self.LeftGridSizer.AddWindow(control, flag=wx.GROW)
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            self.TypeRadioButtons[type] = (radio_button, control)
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            first = False
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        # Create label for transition priority
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        priority_label = wx.StaticText(self, label=_('Priority:'))
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        self.LeftGridSizer.AddWindow(priority_label, flag=wx.GROW)
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        # Create spin control for defining priority value
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        self.Priority = wx.SpinCtrl(self, min=0, style=wx.SP_ARROW_KEYS)
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        self.Bind(wx.EVT_TEXT, self.OnPriorityChanged, self.Priority)
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        self.LeftGridSizer.AddWindow(self.Priority, 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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        # Reference radio button is default control having keyboard focus
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        self.TypeRadioButtons["reference"][0].SetFocus()
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    def GetTransitionType(self):
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        """
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        Return type selected for SFC transition and associated value
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        @return: Type selected and associated value (None if no value)
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        """
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        # Go through radio buttons and return type and value associated to the
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        # one that is selected
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        for type, (radio, control) in self.TypeRadioButtons.iteritems():
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            if radio.GetValue():
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                if isinstance(control, wx.ComboBox):
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                    return type, control.GetStringSelection()
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                elif isinstance(control, wx.TextCtrl):
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                    return type, control.GetValue()
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                else:
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                    return type, None
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        return None, None
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    def SetValues(self, values):
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        """
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        Set default SFC transition parameters
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        @param values: Transition parameters values
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        """
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        # Extract transition value according to type
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        type_value = values.get("value", None)
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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 SFC transition priority
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            if name == "priority":
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                self.Priority.SetValue(values["priority"])
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            # Parameter is SFC transition type
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            elif name == "type":
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                for type, (radio, control) in self.TypeRadioButtons.iteritems():
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                    radio.SetValue(type == value)
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                    if control is not None:
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                        # Enable associated control to type and set value
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                        control.Enable(type == value)
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                        if type == value:
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                            if isinstance(control, wx.ComboBox):
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                                control.SetStringSelection(type_value)
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                            elif isinstance(control, wx.TextCtrl):
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                                control.ChangeValue(type_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 SFC transition parameters defined in dialog
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        @return: {parameter_name: parameter_value,...}
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        """
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        values = {"priority" : self.Priority.GetValue()}
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        values["type"], values["value"] = self.GetTransitionType()
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        values["width"], values["height"] = self.Element.GetSize()
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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 transition type and value associated
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        type, value = self.GetTransitionType()
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        # Test that value associated to type is defined
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        if type != "connection" and value == "":
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            message = _("Form isn't complete. %s must be filled!") % type
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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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        else:
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            # Call BlockPreviewDialog function
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            BlockPreviewDialog.OnOK(self, event)
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    def OnTypeChanged(self, event):
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        """
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        Called when transition type changed
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        @param event: wx.RadioButtonEvent
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        """
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        # Refresh sensibility of control associated to transition types
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        for type, (radio, control) in self.TypeRadioButtons.iteritems():
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            if control is not None:
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                control.Enable(radio.GetValue())
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        # Refresh preview panel
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        self.RefreshPreview()
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        event.Skip()
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    def OnReferenceChanged(self, event):
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        """
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        Called when SFC transition reference value changed
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        @param event: wx.ComboBoxEvent
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        """
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        self.RefreshPreview()
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        event.Skip()
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    def OnInlineChanged(self, event):
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        """
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        Called when SFC transition inline value changed
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        @param event: wx.TextEvent
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        """
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        self.RefreshPreview()
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        event.Skip()
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    def OnPriorityChanged(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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        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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        # Set graphic element displayed, creating a SFC transition
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        self.Element = SFC_Transition(self.Preview)
1252
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        self.Element.SetType(*self.GetTransitionType())
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        self.Element.SetPriority(self.Priority.GetValue())
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        # Call BlockPreviewDialog function
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        BlockPreviewDialog.RefreshPreview(self)