#!/usr/bin/python
# -*- coding: utf-8 -*-

"""!
@package rstream.py

@brief GUI for r.stream.* modules

See http://grass.osgeo.org/wiki/Wx.stream_GSoC_2011

Classes:
 - ImgFrame
 - ListImg
 - ImgPanel

(C) 2011 by Margherita Di Leo, and the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Margherita Di Leo (GSoC student 2011)
"""


import wx
import glob
import os, sys

from debug import Debug as Debug
from preferences import globalSettings as UserSettings

import grass.script as grass
import gselect
import gcmd
import dbm
import globalvar
import utils
import menuform


class ImgPanel(wx.Panel):
    """!Display selected image in the main window
    """
    
    def __init__(self, parent, img):
        """"""
        wx.Panel.__init__(self, parent)
        self.sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.staticBitmap = wx.StaticBitmap(self, -1, img)
        self.PhotoMaxSize = 240
        self.sizer.Add(self.staticBitmap, 1, wx.EXPAND)        
        self.SetSizer(self.sizer)
        self.sizer.Layout()
        


class ListImg(wx.Listbook):
    """!Load png files *from current folder* and convert to bitmap"""
    
    def __init__(self, parent):
        """"""
        wx.Listbook.__init__(self, parent, style=wx.BK_BOTTOM)
        self.pages = []
        pathname = "*.png"
        self.ImL = wx.ImageList(32, 32)
        for imID, filename in enumerate(glob.glob(pathname)):
            bmp = wx.Bitmap(filename, wx.BITMAP_TYPE_PNG)
            img = bmp.ConvertToImage()
            img.Rescale(32, 32)
            bmp_scaled = img.ConvertToBitmap()
            self.ImL.Add(bmp_scaled)
            self.pages.append(ImgPanel(self, bmp))
            self.AddPage(self.pages[-1], "", imageId=imID)
        self.AssignImageList(self.ImL)
            
        # Binders    
        self.Bind(wx.EVT_LISTBOOK_PAGE_CHANGED, self.OnPageChanged)
        self.Bind(wx.EVT_LISTBOOK_PAGE_CHANGING, self.OnPageChanging)
        
    
    def OnPageChanged(self, event):
        old = event.GetOldSelection()
        new = event.GetSelection()
        sel = self.GetSelection()
        print 'OnPageChanged,  old:%d, new:%d, sel:%d\n' % (old, new, sel)
        event.Skip()


    def OnPageChanging(self, event):
        old = event.GetOldSelection()
        new = event.GetSelection()
        sel = self.GetSelection()
        print 'OnPageChanging, old:%d, new:%d, sel:%d\n' % (old, new, sel)
        event.Skip()


class ImgFrame(wx.Frame):
    """!Main frame
    """

    def __init__(self, pat):
        """"""
       
        wx.Frame.__init__(self, None, wx.ID_ANY,
                          "Image Viewer",
                          size=(800,600)
                          )

        directory = pat
        panel = wx.Panel(self)

        os.chdir(directory) 
        previews = ListImg(panel)
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(previews, 1, wx.ALL | wx.EXPAND, 5)
        panel.SetSizer(sizer)
        self.Layout()

        self.Show()


#if __name__ == "__main__":
    #app = wx.PySimpleApp()
    #frame = ImgFrame()
    #app.MainLoop()