beremiz

make clipboard open minimal time as wxPython documentation recommends

2018-05-25, Andrey Skvortsov
5ce6d08ff2c7
make clipboard open minimal time as wxPython documentation recommends

https://wxpython.org/Phoenix/docs/html/wx.Clipboard.html#wx.Clipboard.GetData

"Call wx.Clipboard.Open to get ownership of the clipboard. If this
operation returns True, you now own the clipboard. Call
wx.Clipboard.SetData to put data on the clipboard, or
wx.Clipboard.GetData to retrieve data from the clipboard. Call
wx.Clipboard.Close to close the clipboard and relinquish ownership.
You should keep the clipboard open only momentarily."

Maybe it makes situation with pretty annoying error 'clipboard already
open' a little bit better.

traceback:
File "/home/developer/WorkData/PLC/beremiz/avangard-beremiz-ide/src/../../beremiz/BeremizIDE.py", line 955, in OnSaveProjectMenu
self.RefreshAfterSave()
File "/home/developer/WorkData/PLC/beremiz/avangard-beremiz-ide/src/../../beremiz/BeremizIDE.py", line 946, in RefreshAfterSave
self._Refresh(TITLE, FILEMENU, EDITMENU, PAGETITLES)
File "/home/developer/WorkData/PLC/beremiz/avangard-beremiz-ide/src/../../beremiz/IDEFrame.py", line 926, in _Refresh
self.RefreshFunctions[element]()
File "/home/developer/WorkData/PLC/beremiz/avangard-beremiz-ide/src/../../beremiz/BeremizIDE.py", line 766, in RefreshEditMenu
IDEFrame.RefreshEditMenu(self)
File "/home/developer/WorkData/PLC/beremiz/avangard-beremiz-ide/src/../../beremiz/IDEFrame.py", line 1185, in RefreshEditMenu
if self.GetCopyBuffer() is not None:
File "/home/developer/WorkData/PLC/beremiz/avangard-beremiz-ide/src/../../beremiz/IDEFrame.py", line 956, in GetCopyBuffer
if wx.TheClipboard.Open():
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_misc.py", line 5793, in Open
return _misc_.Clipboard_Open(*args, **kwargs)
: C++ assertion "!m_open" failed at ../src/gtk/clipbrd.cpp(598) in Open(): clipboard already open
#!/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) 2007: Edouard TISSERANT and Laurent BESSARD
#
# 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
from dialogs.BrowseLocationsDialog import BrowseLocationsDialog
class LocationCellControl(wx.PyControl):
'''
Custom cell editor control with a text box and a button that launches
the BrowseLocationsDialog.
'''
def __init__(self, parent):
wx.PyControl.__init__(self, parent)
main_sizer = wx.FlexGridSizer(cols=2, hgap=0, rows=1, vgap=0)
main_sizer.AddGrowableCol(0)
main_sizer.AddGrowableRow(0)
# create location text control
self.Location = wx.TextCtrl(self, size=wx.Size(0, -1),
style=wx.TE_PROCESS_ENTER)
self.Location.Bind(wx.EVT_KEY_DOWN, self.OnLocationChar)
main_sizer.AddWindow(self.Location, flag=wx.GROW)
# create browse button
self.BrowseButton = wx.Button(self, label='...', size=wx.Size(30, -1))
self.BrowseButton.Bind(wx.EVT_BUTTON, self.OnBrowseButtonClick)
main_sizer.AddWindow(self.BrowseButton, flag=wx.GROW)
self.Bind(wx.EVT_SIZE, self.OnSize)
self.SetSizer(main_sizer)
self.Controller = None
self.VarType = None
self.Default = False
def __del__(self):
self.Controller = None
def SetController(self, controller):
self.Controller = controller
def SetVarType(self, vartype):
self.VarType = vartype
def GetVarType(self):
return self.VarType
def SetValue(self, value):
self.Default = value
self.Location.SetValue(value)
def GetValue(self):
return self.Location.GetValue()
def OnSize(self, event):
self.Layout()
def OnBrowseButtonClick(self, event):
# pop up the location browser dialog
dialog = BrowseLocationsDialog(self, self.VarType, self.Controller)
if dialog.ShowModal() == wx.ID_OK:
infos = dialog.GetValues()
else:
infos = None
dialog.Destroy()
if infos is not None:
location = infos["location"]
# set the location
if not infos["location"].startswith("%"):
dialog = wx.SingleChoiceDialog(
self,
_("Select a variable class:"),
_("Variable class"),
[_("Input"), _("Output"), _("Memory")],
wx.DEFAULT_DIALOG_STYLE | wx.OK | wx.CANCEL)
if dialog.ShowModal() == wx.ID_OK:
selected = dialog.GetSelection()
else:
selected = None
dialog.Destroy()
if selected is None:
self.Location.SetFocus()
return
if selected == 0:
location = "%I" + location
elif selected == 1:
location = "%Q" + location
else:
location = "%M" + location
self.Location.SetValue(location)
self.VarType = infos["IEC_type"]
self.Location.SetFocus()
def OnLocationChar(self, event):
keycode = event.GetKeyCode()
if keycode in [wx.WXK_RETURN, wx.WXK_TAB]:
self.Parent.Parent.ProcessEvent(event)
elif keycode == wx.WXK_ESCAPE:
self.Location.SetValue(self.Default)
self.Parent.Parent.CloseEditControl()
else:
event.Skip()
def SetInsertionPoint(self, i):
self.Location.SetInsertionPoint(i)
def SetFocus(self):
self.Location.SetFocus()
class LocationCellEditor(wx.grid.PyGridCellEditor):
'''
Grid cell editor that uses LocationCellControl to display a browse button.
'''
def __init__(self, table, controller):
wx.grid.PyGridCellEditor.__init__(self)
self.Table = table
self.Controller = controller
def __del__(self):
self.CellControl = None
self.Controller = None
def Create(self, parent, id, evt_handler):
self.CellControl = LocationCellControl(parent)
self.SetControl(self.CellControl)
if evt_handler:
self.CellControl.PushEventHandler(evt_handler)
def BeginEdit(self, row, col, grid):
self.CellControl.Enable()
self.CellControl.SetController(self.Controller)
self.CellControl.SetValue(self.Table.GetValueByName(row, 'Location'))
if isinstance(self.CellControl, LocationCellControl):
self.CellControl.SetVarType(self.Table.GetValueByName(row, 'Type'))
self.CellControl.SetFocus()
def EndEditInternal(self, row, col, grid, old_loc):
loc = self.CellControl.GetValue()
changed = loc != old_loc
if changed:
self.Table.SetValueByName(row, 'Location', loc)
self.Table.SetValueByName(row, 'Type', self.CellControl.GetVarType())
self.CellControl.Disable()
return changed
if wx.VERSION >= (3, 0, 0):
def EndEdit(self, row, col, grid, oldval):
return self.EndEditInternal(row, col, grid, oldval)
else:
def EndEdit(self, row, col, grid):
old_loc = self.Table.GetValueByName(row, 'Location')
return self.EndEditInternal(row, col, grid, old_loc)
def SetSize(self, rect):
self.CellControl.SetDimensions(rect.x + 1, rect.y,
rect.width, rect.height,
wx.SIZE_ALLOW_MINUS_ONE)
def Clone(self):
return LocationCellEditor(self.Table, self.Controller)