graphics/ToolTipProducer.py
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 13 Jan 2017 15:03:35 +0300
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child 1730 64d8f52bc8c8
permissions -rw-r--r--
fix file header in AboutDialog.py
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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) 2007: 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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import wx
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from controls.CustomToolTip import CustomToolTip, TOOLTIP_WAIT_PERIOD
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#-------------------------------------------------------------------------------
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#                           Tool Tip Producer class
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#-------------------------------------------------------------------------------
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"""
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Class that implements an element that generate Tool Tip
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"""
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class ToolTipProducer:
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    def __init__(self, parent):
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        """
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        Constructor
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        @param parent: Parent Viewer
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        """
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        self.Parent = parent
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        self.ToolTip = None
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        self.ToolTipPos = None
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        # Timer for firing Tool tip display
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        self.ToolTipTimer = wx.Timer(self.Parent, -1)
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        self.Parent.Bind(wx.EVT_TIMER, 
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            self.OnToolTipTimer, 
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            self.ToolTipTimer)
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    def __del__(self):
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        """
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        Destructor
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        """
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        self.DestroyToolTip()
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    def OnToolTipTimer(self, event):
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        """
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        Callback for Tool Tip firing timer Event
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        @param event: Tool tip text
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        """
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        # Get Tool Tip text
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        value = self.GetToolTipValue()
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        if value is not None and self.ToolTipPos is not None:
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            # Create Tool Tip
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            self.ToolTip = CustomToolTip(self.Parent, value)
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            self.ToolTip.SetToolTipPosition(self.ToolTipPos)
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            self.ToolTip.Show()
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    def GetToolTipValue(self):
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        """
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        Return tool tip text
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        Have to be overridden by inherited classes 
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        @return: Tool tip text (None if not overridden) 
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        """
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        return None
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    def DisplayToolTip(self, pos):
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        """
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        Display Tool tip
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        @param pos: Tool tip position
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        """
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        # Destroy current displayed Tool tip
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        self.DestroyToolTip()
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        # Save Tool Tip position
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        self.ToolTipPos = pos
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        # Start Tool tip firing timer
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        self.ToolTipTimer.Start(
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            int(TOOLTIP_WAIT_PERIOD * 1000), 
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            oneShot=True)
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    def SetToolTipText(self, text):
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        """
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        Set current Tool tip text
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        @param text: Tool tip Text
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        """
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        if self.ToolTip is not None:
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            self.ToolTip.SetTip(text)
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    def DestroyToolTip(self):
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        """
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        Destroy current displayed Tool Tip
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        """
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        # Stop Tool tip firing timer
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        self.ToolTipTimer.Stop()
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        self.ToolTipPos = None
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        # Destroy Tool Tip
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        if self.ToolTip is not None:
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            self.ToolTip.Destroy()
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            self.ToolTip = None