controls/LocationCellEditor.py
author Edouard Tisserant
Fri, 28 Feb 2020 16:09:21 +0100
branchsvghmi
changeset 2844 eee5dcd9fc92
parent 2579 8fb5c6eddc72
child 3303 0ffb41625592
permissions -rw-r--r--
SVGHMI: detachable and discardable elements sets, Reworked geometric intersection, toward more accurate page content detection.

Moved page's widget/element dependency crawling functions so that it is possible to compute a global detachable and discardable elements sets.
Reworked geometric intersection detection logic to distinguish ovelapping and inclusion.
Goal is to include englobing and overlapping graphical elements, but not groups (would then include everything around...). Intermediate commit, to be continued.
#!/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
        self.VariableName = None

    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.VariableName = None
        self.VarType = None
        self.Location.SetValue(value)

    def GetValue(self):
        return self.Location.GetValue()

    def GetName(self):
        return self.VariableName

    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.VariableName = infos["var_name"]
            self.VarType = infos["IEC_type"]

            # when user selected something, end editing immediately
            # so that changes over multiple colums appear
            wx.CallAfter(self.Parent.Parent.CloseEditControl)

        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:
            name = self.CellControl.GetName()
            if name is not None:
                message = self.Table.Parent.CheckVariableName(name, row)
                if message is not None:
                    wx.CallAfter(self.Table.Parent.ShowErrorMessage, message)
                    return None
                old_name = self.Table.GetValueByName(row, 'Name')
                self.Table.SetValueByName(row, 'Name', name)
                self.Table.Parent.OnVariableNameChange(old_name, name)
            self.Table.SetValueByName(row, 'Location', loc)
            var_type = self.CellControl.GetVarType()
            if var_type is not None:
                self.Table.SetValueByName(row, 'Type', var_type)
        else:
            wx.CallAfter(self.Table.Parent.ShowErrorMessage,
                         _("Selected location is identical to previous one"))
        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)