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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