controls/DebugVariablePanel/DebugVariableViewer.py
author Edouard Tisserant <edouard.tisserant@gmail.com>
Mon, 23 Mar 2020 10:16:38 +0100
branchsvghmi
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child 3750 f62625418bff
permissions -rw-r--r--
SVGHMI: ForEach knows its own widgets
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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) 2012: 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 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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from __future__ import division
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from collections import OrderedDict
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from functools import reduce
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import wx
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from matplotlib.backends.backend_wxagg import _convert_agg_to_wx_bitmap
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from dialogs.ForceVariableDialog import ForceVariableDialog
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# Viewer highlight types
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[HIGHLIGHT_NONE,
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 HIGHLIGHT_BEFORE,
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 HIGHLIGHT_AFTER,
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 HIGHLIGHT_LEFT,
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 HIGHLIGHT_RIGHT,
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 HIGHLIGHT_RESIZE] = range(6)
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# Viewer highlight styles
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HIGHLIGHT = {
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}
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# -------------------------------------------------------------------------------
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#                        Base Debug Variable Viewer Class
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# -------------------------------------------------------------------------------
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class DebugVariableViewer(object):
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    """
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    Class that implements a generic viewer that display a list of variable values
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    This class has to be inherited to effectively display variable values
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    """
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    def __init__(self, window, items=None):
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        """
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        Constructor
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        @param window: Reference to the Debug Variable Panel
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        @param items: List of DebugVariableItem displayed by Viewer
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        """
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        self.ParentWindow = window
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        items = [] if items is None else items
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        self.ItemsDict = OrderedDict([(item.GetVariable(), item)
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                                      for item in items])
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        self.Items = self.ItemsDict.viewvalues()
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        # Variable storing current highlight displayed in Viewer
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        self.Highlight = HIGHLIGHT_NONE
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        # List of buttons
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        self.Buttons = []
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        self.InitHighlightPensBrushes()
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    def __del__(self):
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        """
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        Destructor
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        """
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        # Remove reference to Debug Variable Panel
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        self.ParentWindow = None
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    def InitHighlightPensBrushes(self):
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        """
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        Init global pens and brushes
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        """
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        if not HIGHLIGHT:
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            HIGHLIGHT['DROP_PEN'] = wx.Pen(wx.Colour(0, 128, 255))
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            HIGHLIGHT['DROP_BRUSH'] = wx.Brush(wx.Colour(0, 128, 255, 128))
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            HIGHLIGHT['RESIZE_PEN'] = wx.Pen(wx.Colour(200, 200, 200))
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            HIGHLIGHT['RESIZE_BRUSH'] = wx.Brush(wx.Colour(200, 200, 200))
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    def GetIndex(self):
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        """
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        Return position of Viewer in Debug Variable Panel
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        @return: Position of Viewer
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        """
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        return self.ParentWindow.GetViewerIndex(self)
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    def GetItem(self, variable):
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        """
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        Return item storing values of a variable
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        @param variable: Variable path
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        @return: Item storing values of this variable
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        """
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        return self.ItemsDict.get(variable, None)
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    def GetItems(self):
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        """
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        Return items displayed by Viewer
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        @return: List of items displayed in Viewer
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        """
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        return self.ItemsDict.values()
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    def AddItem(self, item):
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        """
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        Add an item to the list of items displayed by Viewer
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        @param item: Item to add to the list
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        """
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        self.ItemsDict[item.GetVariable()] = item
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    def RemoveItem(self, item):
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        """
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        Remove an item from the list of items displayed by Viewer
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        @param item: Item to remove from the list
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        """
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        self.ItemsDict.pop(item.GetVariable(), None)
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    def ClearItems(self):
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        """
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        Clear list of items displayed by Viewer
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        """
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        # Unsubscribe every items of the list
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        for item in self.Items:
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            self.ParentWindow.RemoveDataConsumer(item)
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        # Clear list
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        self.ItemsDict.clear()
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    def ItemsIsEmpty(self):
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        """
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        Return if list of items displayed by Viewer is empty
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        @return: True if list is empty
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        """
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        return len(self.Items) == 0
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    def SubscribeAllDataConsumers(self):
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        """
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        Function that unsubscribe and remove every item that store values of
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        a variable that doesn't exist in PLC anymore
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        """
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        for item in self.ItemsDict.values()[:]:
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            iec_path = item.GetVariable()
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            # Check that variablepath exist in PLC
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            if self.ParentWindow.GetDataType(iec_path) is None:
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                # If not, unsubscribe and remove it
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                self.ParentWindow.RemoveDataConsumer(item)
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                self.RemoveItem(item)
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            else:
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                # If it exist, resubscribe and refresh data type
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                self.ParentWindow.AddDataConsumer(iec_path.upper(), item, True)
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                item.RefreshVariableType()
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    def ResetItemsData(self):
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        """
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        Reset data stored in every items displayed in Viewer
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        """
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        for item in self.Items:
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            item.ResetData()
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    def GetItemsMinCommonTick(self):
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        """
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        Return the minimum tick common to all iems displayed in Viewer
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        @return: Minimum common tick between items
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        """
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        return reduce(max, [item.GetData()[0, 0]
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                            for item in self.Items
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                            if len(item.GetData()) > 0], 0)
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    def RefreshViewer(self):
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        """
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        Method that refresh the content displayed by Viewer
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        Need to be overridden by inherited classes
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        """
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        pass
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    def SetHighlight(self, highlight):
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        """
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        Set Highlight type displayed in Viewer
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        @return: True if highlight has changed
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        """
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        # Return immediately if highlight don't change
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        if self.Highlight == highlight:
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            return False
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        self.Highlight = highlight
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        return True
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    def GetButtons(self):
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        """
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        Return list of buttons defined in Viewer
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        @return: List of buttons
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        """
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        return self.Buttons
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    def IsOverButton(self, x, y):
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        """
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        Return if point is over one button of Viewer
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        @param x: X coordinate of point
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        @param y: Y coordinate of point
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        @return: button where point is over
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        """
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        for button in self.GetButtons():
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            if button.HitTest(x, y):
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                return button
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        return None
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    def HandleButton(self, x, y):
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        """
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        Search for the button under point and if found execute associated
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        callback
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        @param x: X coordinate of point
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        @param y: Y coordinate of point
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        @return: True if a button was found and callback executed
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        """
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        button = self.IsOverButton(x, y)
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        if button is None:
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            return False
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        button.ProcessCallback()
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        return True
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    def ShowButtons(self, show):
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        """
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        Set display state of buttons in Viewer
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        @param show: Display state (True if buttons must be displayed)
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        """
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        # Change display of every buttons
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        for button in self.Buttons:
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            button.Show(show)
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        # Refresh button positions
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        self.RefreshButtonsPosition()
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        self.RefreshViewer()
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    def RefreshButtonsPosition(self):
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        """
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        Function that refresh buttons position in Viewer
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        """
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        # Get Viewer size
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        width, _height = self.GetSize()
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        # Buttons are align right so we calculate buttons positions in
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        # reverse order
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        buttons = self.Buttons[:]
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        buttons.reverse()
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        # Position offset on x coordinate
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        x_offset = 0
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        for button in buttons:
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            # Buttons are stacked right, removing those that are not active
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            if button.IsEnabled():
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                # Update button position according to button width and offset
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                # on x coordinate
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                w, _h = button.GetSize()
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                button.SetPosition(width - 5 - w - x_offset, 5)
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                # Update offset on x coordinate
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                x_offset += w + 2
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    def DrawCommonElements(self, dc, buttons=None):
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        """
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        Function that draw common graphics for every Viewers
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        @param dc: wx.DC object corresponding to Device context where drawing
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        common graphics
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        @param buttons: List of buttons to draw if different from default
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        (default None)
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        """
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        # Get Viewer size
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        width, height = self.GetSize()
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        # Set dc styling for drop before or drop after highlight
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        dc.SetPen(HIGHLIGHT['DROP_PEN'])
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        dc.SetBrush(HIGHLIGHT['DROP_BRUSH'])
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        # Draw line at upper side of Viewer if highlight is drop before
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        if self.Highlight == HIGHLIGHT_BEFORE:
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            dc.DrawLine(0, 1, width - 1, 1)
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        # Draw line at lower side of Viewer if highlight is drop before
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        elif self.Highlight == HIGHLIGHT_AFTER:
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            dc.DrawLine(0, height - 1, width - 1, height - 1)
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        # If no specific buttons are defined, get default buttons
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        if buttons is None:
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            buttons = self.Buttons
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        # Draw buttons
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        for button in buttons:
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            button.Draw(dc)
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        # If graph dragging is processing
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        if self.ParentWindow.IsDragging():
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            destBBox = self.ParentWindow.GetDraggingAxesClippingRegion(self)
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            srcPos = self.ParentWindow.GetDraggingAxesPosition(self)
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            if destBBox.width > 0 and destBBox.height > 0:
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                srcPanel = self.ParentWindow.DraggingAxesPanel
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                srcBBox = srcPanel.GetAxesBoundingBox()
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                srcX = srcBBox.x - (srcPos.x if destBBox.x == 0 else 0)
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                srcY = srcBBox.y - (srcPos.y if destBBox.y == 0 else 0)
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                srcBmp = _convert_agg_to_wx_bitmap(
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                    srcPanel.get_renderer(), None)
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                srcDC = wx.MemoryDC()
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                srcDC.SelectObject(srcBmp)
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                dc.Blit(destBBox.x, destBBox.y,
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                        int(destBBox.width), int(destBBox.height),
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                        srcDC, srcX, srcY)
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    def OnEnter(self, event):
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        """
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        Function called when entering Viewer
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        @param event: wx.MouseEvent
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        """
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        # Display buttons
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        self.ShowButtons(True)
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        event.Skip()
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    def OnLeave(self, event):
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        """
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        Function called when leaving Viewer
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        @param event: wx.MouseEvent
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        """
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        # Hide buttons
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        self.ShowButtons(False)
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        event.Skip()
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    def OnCloseButton(self):
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        """
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        Function called when Close button is pressed
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        """
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        wx.CallAfter(self.ParentWindow.DeleteValue, self)
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    def OnForceButton(self):
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        """
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        Function called when Force button is pressed
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        """
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        self.ForceValue(self.ItemsDict.values()[0])
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    def OnReleaseButton(self):
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        """
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        Function called when Release button is pressed
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        """
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        self.ReleaseValue(self.ItemsDict.values()[0])
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    def OnMouseDragging(self, x, y):
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        """
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        Function called when mouse is dragged over Viewer
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        @param x: X coordinate of mouse pointer
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        @param y: Y coordinate of mouse pointer
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        """
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        xw, yw = self.GetPosition()
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        # Refresh highlight in Debug Variable Panel (highlight can be displayed
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        # in another Viewer
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        self.ParentWindow.RefreshHighlight(x + xw, y + yw)
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    def RefreshHighlight(self, x, y):
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        """
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        Function called by Debug Variable Panel asking Viewer to refresh
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        highlight according to mouse position
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        @param x: X coordinate of mouse pointer
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        @param y: Y coordinate of mouse pointer
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        """
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        # Get Viewer size
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        _width, height = self.GetSize()
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        # Mouse is in the first half of Viewer
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        if y < height // 2:
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            # If Viewer is the upper one, draw drop before highlight
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            if self.ParentWindow.IsViewerFirst(self):
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                self.SetHighlight(HIGHLIGHT_BEFORE)
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            # Else draw drop after highlight in previous Viewer
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            else:
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                self.SetHighlight(HIGHLIGHT_NONE)
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                self.ParentWindow.HighlightPreviousViewer(self)
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        # Mouse is in the second half of Viewer, draw drop after highlight
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        else:
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            self.SetHighlight(HIGHLIGHT_AFTER)
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    def OnEraseBackground(self, event):
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        """
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        Function called when Viewer background is going to be erase
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        @param event: wx.EraseEvent
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        """
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        # Prevent flicker on Windows
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        pass
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    def OnResize(self, event):
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        """
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        Function called when Viewer size changed
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        @param event: wx.ResizeEvent
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        """
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        # Refresh button positions
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        self.RefreshButtonsPosition()
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        self.ParentWindow.ForceRefresh()
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        event.Skip()
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    def ForceValue(self, item):
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        """
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        Force value of item given
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        @param item: Item to force value
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        """
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        # Check variable data type
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        iec_path = item.GetVariable()
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        iec_type = self.ParentWindow.GetDataType(iec_path)
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        # Return immediately if not found
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        if iec_type is None:
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            return
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        # Open a dialog to enter varaible forced value
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        dialog = ForceVariableDialog(self, iec_type, str(item.GetValue()))
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        if dialog.ShowModal() == wx.ID_OK:
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            self.ParentWindow.ForceDataValue(iec_path.upper(),
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                                             dialog.GetValue())
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    def ReleaseValue(self, item):
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        """
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        Release value of item given
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        @param item: Item to release value
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        """
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        self.ParentWindow.ReleaseDataValue(
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            item.GetVariable().upper())