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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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from __future__ import absolute_import

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from __future__ import division

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import wx

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import wx.lib.agw.customtreectrl as CT

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from util.BitmapLibrary import GetBitmap

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# Customize CustomTreeItem for adding icon on item left

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CT.GenericTreeItem._ExtraImage = None

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def SetExtraImage(self, image):

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    self._type = (1 if image is not None else 0)

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    self._ExtraImage = image

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CT.GenericTreeItem.SetExtraImage = SetExtraImage

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_DefaultGetCurrentCheckedImage = CT.GenericTreeItem.GetCurrentCheckedImage

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def GetCurrentCheckedImage(self):

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    if self._ExtraImage is not None:

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        return self._ExtraImage

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    return _DefaultGetCurrentCheckedImage(self)

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CT.GenericTreeItem.GetCurrentCheckedImage = GetCurrentCheckedImage

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class CustomTree(CT.CustomTreeCtrl):

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    def __init__(self, *args, **kwargs):

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        CT.CustomTreeCtrl.__init__(self, *args, **kwargs)

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        self.BackgroundBitmap = None

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        self.BackgroundAlign = wx.ALIGN_LEFT | wx.ALIGN_TOP

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        self.AddMenu = None

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        self.Enabled = False

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        self.Bind(wx.EVT_SCROLLWIN, self.OnScroll)

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        self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)

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    def SetBackgroundBitmap(self, bitmap, align):

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        self.BackgroundBitmap = bitmap

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        self.BackgroundAlign = align

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    def SetImageListCheck(self, sizex, sizey, imglist=None):

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        CT.CustomTreeCtrl.SetImageListCheck(self, sizex, sizey, imglist=None)

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        self.ExtraImages = {}

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        for image in ["function", "functionBlock", "program"]:

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            self.ExtraImages[image] = self._imageListCheck.Add(GetBitmap(image.upper()))

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    def SetItemExtraImage(self, item, bitmap):

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        dc = wx.ClientDC(self)

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        image = self.ExtraImages.get(bitmap)

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        if image is not None:

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            item.SetExtraImage(image)

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        else:

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            item.SetExtraImage(None)

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        self.CalculateSize(item, dc)

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        self.RefreshLine(item)

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    def SetAddMenu(self, add_menu):

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        self.AddMenu = add_menu

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    def Enable(self, enabled):

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        self.Enabled = enabled

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    def GetBitmapRect(self):

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        client_size = self.GetClientSize()

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        bitmap_size = self.BackgroundBitmap.GetSize()

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        if self.BackgroundAlign & wx.ALIGN_RIGHT:

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            x = client_size[0] - bitmap_size[0]

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        elif self.BackgroundAlign & wx.ALIGN_CENTER_HORIZONTAL:

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            x = (client_size[0] - bitmap_size[0]) // 2

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        else:

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            x = 0

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        if self.BackgroundAlign & wx.ALIGN_BOTTOM:

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            y = client_size[1] - bitmap_size[1]

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        elif self.BackgroundAlign & wx.ALIGN_CENTER_VERTICAL:

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            y = (client_size[1] - bitmap_size[1]) // 2

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        else:

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            y = 0

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        return wx.Rect(x, y, bitmap_size[0], bitmap_size[1])

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    def OnLeftUp(self, event):

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        if self.Enabled:

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            pos = event.GetPosition()

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            _item, flags = self.HitTest(pos)

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            bitmap_rect = self.GetBitmapRect()

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            if ((bitmap_rect.Contains(pos.x, pos.y) or

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                 flags & wx.TREE_HITTEST_NOWHERE) and self.AddMenu is not None):

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                wx.CallAfter(self.PopupMenu, self.AddMenu, pos.x, pos.y)

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        event.Skip()

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    def OnEraseBackground(self, event):

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        dc = event.GetDC()

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        if not dc:

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            dc = wx.ClientDC(self)

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            rect = self.GetUpdateRegion().GetBox()

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            dc.SetClippingRect(rect)

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        dc.Clear()

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        bitmap_rect = self.GetBitmapRect()

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        dc.DrawBitmap(self.BackgroundBitmap, bitmap_rect.x, bitmap_rect.y)

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    def OnScroll(self, event):

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        wx.CallAfter(self.Refresh)

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        event.Skip()

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    def OnSize(self, event):

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        CT.CustomTreeCtrl.OnSize(self, event)

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        self.Refresh()