1

#!/usr/bin/env python

     2

# -*- coding: utf-8 -*-

     3

     4

#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor

     5

#based on the plcopen standard. 

     6

#

     7

#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

     8

#

     9

#See COPYING file for copyrights details.

    10

#

    11

#This library is free software; you can redistribute it and/or

    12

#modify it under the terms of the GNU General Public

    13

#License as published by the Free Software Foundation; either

    14

#version 2.1 of the License, or (at your option) any later version.

    15

#

    16

#This library is distributed in the hope that it will be useful,

    17

#but WITHOUT ANY WARRANTY; without even the implied warranty of

    18

#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    19

#General Public License for more details.

    20

#

    21

#You should have received a copy of the GNU General Public

    22

#License along with this library; if not, write to the Free Software

    23

#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    24

    25

import wx

    26

    27

from dialogs.BrowseLocationsDialog import BrowseLocationsDialog

    28

    29

class LocationCellControl(wx.PyControl):

    30

    31

    '''

    32

    Custom cell editor control with a text box and a button that launches

    33

    the BrowseLocationsDialog.

    34

    '''

    35

    def __init__(self, parent):

    36

        wx.Control.__init__(self, parent)

    37

    38

        main_sizer = wx.FlexGridSizer(cols=2, hgap=0, rows=1, vgap=0)

    39

        main_sizer.AddGrowableCol(0)

    40

        main_sizer.AddGrowableRow(0)

    41

    42

        # create location text control

    43

        self.Location = wx.TextCtrl(self, size=wx.Size(0, -1), 

    44

              style=wx.TE_PROCESS_ENTER)

    45

        self.Location.Bind(wx.EVT_KEY_DOWN, self.OnLocationChar)

    46

        main_sizer.AddWindow(self.Location, flag=wx.GROW)

    47

    48

        # create browse button

    49

        self.BrowseButton = wx.Button(self, label='...', size=wx.Size(30, -1))

    50

        self.BrowseButton.Bind(wx.EVT_BUTTON, self.OnBrowseButtonClick)

    51

        main_sizer.AddWindow(self.BrowseButton, flag=wx.GROW)

    52

    53

        self.Bind(wx.EVT_SIZE, self.OnSize)

    54

    55

        self.SetSizer(main_sizer)

    56

    57

        self.Controller = None

    58

        self.VarType = None

    59

        self.Default = False

    60

    61

    def __del__(self):

    62

        self.Controller = None

    63

    64

    def SetController(self, controller):

    65

        self.Controller = controller

    66

    67

    def SetVarType(self, vartype):

    68

        self.VarType = vartype

    69

    70

    def GetVarType(self):

    71

        return self.VarType

    72

    73

    def SetValue(self, value):

    74

        self.Default = value

    75

        self.Location.SetValue(value)

    76

    77

    def GetValue(self):

    78

        return self.Location.GetValue()

    79

    80

    def OnSize(self, event):

    81

        self.Layout()

    82

    83

    def OnBrowseButtonClick(self, event):

    84

        # pop up the location browser dialog

    85

        dialog = BrowseLocationsDialog(self, self.VarType, self.Controller)

    86

        if dialog.ShowModal() == wx.ID_OK:

    87

            infos = dialog.GetValues()

    88

        else:

    89

            infos = None

    90

        dialog.Destroy()

    91

    92

        if infos is not None:

    93

            location = infos["location"]

    94

            # set the location

    95

            if not infos["location"].startswith("%"):

    96

                dialog = wx.SingleChoiceDialog(self, 

    97

                      _("Select a variable class:"), _("Variable class"), 

    98

                      ["Input", "Output", "Memory"], 

    99

                      wx.DEFAULT_DIALOG_STYLE|wx.OK|wx.CANCEL)

   100

                if dialog.ShowModal() == wx.ID_OK:

   101

                    selected = dialog.GetSelection()

   102

                else:

   103

                    selected = None

   104

                dialog.Destroy()

   105

                if selected is None:

   106

                    self.Location.SetFocus()

   107

                    return

   108

                if selected == 0:

   109

                    location = "%I" + location

   110

                elif selected == 1:

   111

                    location = "%Q" + location

   112

                else:

   113

                    location = "%M" + location

   114

   115

            self.Location.SetValue(location)

   116

            self.VarType = infos["IEC_type"]

   117

   118

        self.Location.SetFocus()

   119

   120

    def OnLocationChar(self, event):

   121

        keycode = event.GetKeyCode()

   122

        if keycode in [wx.WXK_RETURN, wx.WXK_TAB]:

   123

            self.Parent.Parent.ProcessEvent(event)

   124

        elif keycode == wx.WXK_ESCAPE:

   125

            self.Location.SetValue(self.Default)

   126

            self.Parent.Parent.CloseEditControl()

   127

        else:

   128

            event.Skip()

   129

   130

    def SetInsertionPoint(self, i):

   131

        self.Location.SetInsertionPoint(i)

   132

   133

    def SetFocus(self):

   134

        self.Location.SetFocus()

   135

   136

class LocationCellEditor(wx.grid.PyGridCellEditor):

   137

    '''

   138

    Grid cell editor that uses LocationCellControl to display a browse button.

   139

    '''

   140

    def __init__(self, table, controller):

   141

        wx.grid.PyGridCellEditor.__init__(self)

   142

   143

        self.Table = table

   144

        self.Controller = controller

   145

   146

    def __del__(self):

   147

        self.CellControl = None

   148

        self.Controller = None

   149

   150

    def Create(self, parent, id, evt_handler):

   151

        self.CellControl = LocationCellControl(parent)

   152

        self.SetControl(self.CellControl)

   153

        if evt_handler:

   154

            self.CellControl.PushEventHandler(evt_handler)

   155

   156

    def BeginEdit(self, row, col, grid):

   157

        self.CellControl.Enable()

   158

        self.CellControl.SetController(self.Controller)

   159

        self.CellControl.SetValue(self.Table.GetValueByName(row, 'Location'))

   160

        if isinstance(self.CellControl, LocationCellControl):

   161

            self.CellControl.SetVarType(self.Table.GetValueByName(row, 'Type'))

   162

        self.CellControl.SetFocus()

   163

   164

    def EndEdit(self, row, col, grid):

   165

        loc = self.CellControl.GetValue()

   166

        old_loc = self.Table.GetValueByName(row, 'Location')

   167

        changed = loc != old_loc

   168

        if changed:

   169

            self.Table.SetValueByName(row, 'Location', loc)

   170

            self.Table.SetValueByName(row, 'Type', self.CellControl.GetVarType())

   171

        self.CellControl.Disable()

   172

        return changed

   173

   174

    def SetSize(self, rect):

   175

        self.CellControl.SetDimensions(rect.x + 1, rect.y,

   176

                                        rect.width, rect.height,

   177

                                        wx.SIZE_ALLOW_MINUS_ONE)

   178

   179

    def Clone(self):

   180

        return LocationCellEditor(self.Table, self.Controller)

   181