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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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#This library is free software; you can redistribute it and/or

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#modify it under the terms of the GNU General Public

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#License as published by the Free Software Foundation; either

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#version 2.1 of the License, or (at your option) any later version.

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#

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#This library 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 GNU

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#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

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#License along with this library; if not, write to the Free Software

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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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import wx

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class CustomTree(wx.TreeCtrl):

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

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        wx.TreeCtrl.__init__(self, *args, **kwargs)

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        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)

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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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        if wx.Platform == '__WXMSW__':

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            self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)

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        else:

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            self.Bind(wx.EVT_PAINT, self.OnPaint)

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            self.Bind(wx.EVT_SIZE, self.OnResize)

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            self.Bind(wx.EVT_SCROLL, 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 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 RefreshBackground(self, refresh_base=False):

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        dc = wx.ClientDC(self)

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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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        if refresh_base:

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            self.Refresh(False)

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    def OnEraseBackground(self, event):

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        self.RefreshBackground(True)

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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.InsideXY(pos.x, pos.y) or 

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

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                self.PopupMenuXY(self.AddMenu, pos.x, pos.y)

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        event.Skip()

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    def OnScroll(self, event):

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        print "scroll event"

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        self.RefreshBackground(True)

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        event.Skip()

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    def OnResize(self, event):

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        self.RefreshBackground(True)

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        event.Skip()

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    def OnPaint(self, event):

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        self.RefreshBackground()

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        event.Skip()