#!/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) 2012: 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
from __future__ import division
import wx
from controls.DebugVariablePanel.DebugVariableViewer import DebugVariableViewer
from controls.DebugVariablePanel.GraphButton import GraphButton
# -------------------------------------------------------------------------------
# Debug Variable Text Viewer Drop Target
# -------------------------------------------------------------------------------
class DebugVariableTextDropTarget(wx.TextDropTarget):
"""
Class that implements a custom drop target class for Debug Variable Text Viewer
"""
def __init__(self, parent, window):
"""
Constructor
@param parent: Reference to Debug Variable Text Viewer
@param window: Reference to the Debug Variable Panel
"""
wx.TextDropTarget.__init__(self)
self.ParentControl = parent
self.ParentWindow = window
def __del__(self):
"""
Destructor
"""
# Remove reference to Debug Variable Text Viewer and Debug Variable
# Panel
self.ParentControl = None
self.ParentWindow = None
def OnDragOver(self, x, y, d):
"""
Function called when mouse is dragged over Drop Target
@param x: X coordinate of mouse pointer
@param y: Y coordinate of mouse pointer
@param d: Suggested default for return value
"""
# Signal parent that mouse is dragged over
self.ParentControl.OnMouseDragging(x, y)
return wx.TextDropTarget.OnDragOver(self, x, y, d)
def OnDropText(self, x, y, data):
"""
Function called when mouse is released in Drop Target
@param x: X coordinate of mouse pointer
@param y: Y coordinate of mouse pointer
@param data: Text associated to drag'n drop
"""
# Signal Debug Variable Panel to reset highlight
self.ParentWindow.ResetHighlight()
message = None
# Check that data is valid regarding DebugVariablePanel
try:
values = eval(data)
if not isinstance(values, tuple):
raise ValueError
except Exception:
message = _("Invalid value \"%s\" for debug variable") % data
values = None
# Display message if data is invalid
if message is not None:
wx.CallAfter(self.ShowMessage, message)
# Data contain a reference to a variable to debug
elif values[1] == "debug":
# Get Before which Viewer the variable has to be moved or added
# according to the position of mouse in Viewer.
_width, height = self.ParentControl.GetSize()
target_idx = self.ParentControl.GetIndex()
if y > height // 2:
target_idx += 1
# Drag'n Drop is an internal is an internal move inside Debug
# Variable Panel
if len(values) > 2 and values[2] == "move":
self.ParentWindow.MoveValue(values[0],
target_idx)
# Drag'n Drop was initiated by another control of Beremiz
else:
self.ParentWindow.InsertValue(values[0],
target_idx,
force=True)
def OnLeave(self):
"""
Function called when mouse is leave Drop Target
"""
# Signal Debug Variable Panel to reset highlight
self.ParentWindow.ResetHighlight()
return wx.TextDropTarget.OnLeave(self)
def ShowMessage(self, message):
"""
Show error message in Error Dialog
@param message: Error message to display
"""
dialog = wx.MessageDialog(self.ParentWindow,
message,
_("Error"),
wx.OK | wx.ICON_ERROR)
dialog.ShowModal()
dialog.Destroy()
# -------------------------------------------------------------------------------
# Debug Variable Text Viewer Class
# -------------------------------------------------------------------------------
class DebugVariableTextViewer(DebugVariableViewer, wx.Panel):
"""
Class that implements a Viewer that display variable values as a text
"""
def __init__(self, parent, window, items=None):
"""
Constructor
@param parent: Parent wx.Window of DebugVariableText
@param window: Reference to the Debug Variable Panel
@param items: List of DebugVariableItem displayed by Viewer
"""
DebugVariableViewer.__init__(self, window, items)
wx.Panel.__init__(self, parent)
# Set panel background colour
self.SetBackgroundColour(wx.WHITE)
# Define panel drop target
self.SetDropTarget(DebugVariableTextDropTarget(self, window))
# Bind events
self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
self.Bind(wx.EVT_LEFT_DCLICK, self.OnLeftDClick)
self.Bind(wx.EVT_ENTER_WINDOW, self.OnEnter)
self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeave)
self.Bind(wx.EVT_SIZE, self.OnResize)
self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
self.Bind(wx.EVT_PAINT, self.OnPaint)
# Define panel min size for parent sizer layout
self.SetMinSize(wx.Size(0, 25))
# Add buttons to Viewer
for bitmap, callback in [("force", self.OnForceButton),
("release", self.OnReleaseButton),
("delete_graph", self.OnCloseButton)]:
self.Buttons.append(GraphButton(0, 0, bitmap, callback))
def RefreshViewer(self):
"""Triggers EVT_PAINT event to refresh UI"""
self.Refresh()
def DrawViewer(self):
"""
Redraw content displayed by Viewer
"""
# Create buffered DC for drawing in panel
width, height = self.GetSize()
bitmap = wx.Bitmap(width, height)
dc = wx.BufferedDC(wx.PaintDC(self), bitmap)
dc.Clear()
# Get Graphics Context for DC, for anti-aliased and transparent
# rendering
gc = wx.GCDC(dc)
# Get first item
item = self.ItemsDict.values()[0]
# Get item variable path masked according Debug Variable Panel mask
item_path = item.GetVariable(
self.ParentWindow.GetVariableNameMask())
# Draw item variable path at Viewer left side
w, h = gc.GetTextExtent(item_path)
gc.DrawText(item_path, 20, (height - h) // 2)
# Update 'Release' button state and text color according to item forced
# flag value
item_forced = item.IsForced()
self.Buttons[1].Enable(item_forced)
self.RefreshButtonsPosition()
if item_forced:
gc.SetTextForeground(wx.BLUE)
# Draw item current value at right side of Viewer
item_value = item.GetValue()
w, h = gc.GetTextExtent(item_value)
gc.DrawText(item_value, width - 40 - w, (height - h) // 2)
# Draw other Viewer common elements
self.DrawCommonElements(gc)
def OnLeftDown(self, event):
"""
Function called when mouse left button is pressed
@param event: wx.MouseEvent
"""
# Get first item
item = self.ItemsDict.values()[0]
# Calculate item path bounding box
_width, height = self.GetSize()
item_path = item.GetVariable(
self.ParentWindow.GetVariableNameMask())
w, h = self.GetTextExtent(item_path)
# Test if mouse has been pressed in this bounding box. In that case
# start a move drag'n drop of item variable
x, y = event.GetPosition()
item_path_bbox = wx.Rect(20, (height - h) / 2, w, h)
if item_path_bbox.Contains(x, y):
self.ShowButtons(False)
data = wx.TextDataObject(str((item.GetVariable(), "debug", "move")))
dragSource = wx.DropSource(self)
dragSource.SetData(data)
dragSource.DoDragDrop()
# In other case handle event normally
else:
event.Skip()
def OnLeftUp(self, event):
"""
Function called when mouse left button is released
@param event: wx.MouseEvent
"""
# Execute callback on button under mouse pointer if it exists
x, y = event.GetPosition()
self.HandleButton(x, y)
event.Skip()
def OnLeftDClick(self, event):
"""
Function called when mouse left button is double clicked
@param event: wx.MouseEvent
"""
# Only numeric variables can be toggled to graph canvas
if self.ItemsDict.values()[0].IsNumVariable():
self.ParentWindow.ToggleViewerType(self)
def OnPaint(self, event):
"""
Function called when redrawing Viewer content is needed
@param event: wx.PaintEvent
"""
self.DrawViewer()
event.Skip()