import win32ui
import win32con
import win32api
import string
import os
from . import app
import sys

from pywin.mfc import docview, window

bStretch = 1

class BitmapDocument(docview.Document):
	"A bitmap document.  Holds the bitmap data itself."
	def __init__(self, template):
		docview.Document.__init__(self, template)
		self.bitmap=None
	def OnNewDocument(self):
		# I can not create new bitmaps.
		win32ui.MessageBox("Bitmaps can not be created.")
	def OnOpenDocument(self, filename):
		self.bitmap=win32ui.CreateBitmap()
		# init data members
		f = open(filename, 'rb')
		try:
			try:
				self.bitmap.LoadBitmapFile(f)
			except IOError:
				win32ui.MessageBox("Could not load the bitmap from %s" % filename)
				return 0
		finally:
			f.close()
		self.size = self.bitmap.GetSize()
		return 1
	def DeleteContents(self):
		self.bitmap=None

class BitmapView(docview.ScrollView):
	"A view of a bitmap.  Obtains data from document."
	def __init__(self, doc):
		docview.ScrollView.__init__(self, doc)
		self.width = self.height = 0
		# set up message handlers
		self.HookMessage (self.OnSize, win32con.WM_SIZE)
		
	def OnInitialUpdate(self):
		doc = self.GetDocument()
		if doc.bitmap:
			bitmapSize = doc.bitmap.GetSize()
			self.SetScrollSizes(win32con.MM_TEXT, bitmapSize)

	def OnSize (self, params):
		lParam = params[3]
		self.width = win32api.LOWORD(lParam)
		self.height = win32api.HIWORD(lParam)

	def OnDraw (self, dc):
		# set sizes used for "non stretch" mode.
		doc = self.GetDocument()
		if doc.bitmap is None: return
		bitmapSize = doc.bitmap.GetSize()
		if bStretch:
			# stretch BMP.
			viewRect = (0,0,self.width, self.height)
			bitmapRect = (0,0,bitmapSize[0], bitmapSize[1])
			doc.bitmap.Paint(dc, viewRect, bitmapRect)
		else:
			# non stretch.
			doc.bitmap.Paint(dc)
	
class BitmapFrame(window.MDIChildWnd):
	def OnCreateClient( self, createparams, context ):
		borderX = win32api.GetSystemMetrics(win32con.SM_CXFRAME)
		borderY = win32api.GetSystemMetrics(win32con.SM_CYFRAME)
		titleY = win32api.GetSystemMetrics(win32con.SM_CYCAPTION)	# includes border
		# try and maintain default window pos, else adjust if cant fit
		# get the main client window dimensions.
		mdiClient = win32ui.GetMainFrame().GetWindow(win32con.GW_CHILD)
		clientWindowRect=mdiClient.ScreenToClient(mdiClient.GetWindowRect())
		clientWindowSize=(clientWindowRect[2]-clientWindowRect[0],clientWindowRect[3]-clientWindowRect[1])
		left, top, right, bottom=mdiClient.ScreenToClient(self.GetWindowRect())
#		width, height=context.doc.size[0], context.doc.size[1]
#		width = width+borderX*2
#		height= height+titleY+borderY*2-1
#		if (left+width)>clientWindowSize[0]:
#			left = clientWindowSize[0] - width
#		if left<0:
#			left = 0
#			width = clientWindowSize[0]
#		if (top+height)>clientWindowSize[1]:
#			top = clientWindowSize[1] - height
#		if top<0:
#			top = 0
#			height = clientWindowSize[1]
#		self.frame.MoveWindow((left, top, left+width, top+height),0)
		window.MDIChildWnd.OnCreateClient(self, createparams, context)
		return 1


class BitmapTemplate(docview.DocTemplate):
	def __init__(self):
		docview.DocTemplate.__init__(self, win32ui.IDR_PYTHONTYPE, BitmapDocument, BitmapFrame, BitmapView)
	def MatchDocType(self, fileName, fileType):
		doc = self.FindOpenDocument(fileName)
		if doc: return doc
		ext = os.path.splitext(fileName)[1].lower()
		if ext =='.bmp': # removed due to PIL! or ext=='.ppm':
			return win32ui.CDocTemplate_Confidence_yesAttemptNative
		return win32ui.CDocTemplate_Confidence_maybeAttemptForeign
#		return win32ui.CDocTemplate_Confidence_noAttempt

# For debugging purposes, when this module may be reloaded many times.
try:
	win32ui.GetApp().RemoveDocTemplate(bitmapTemplate)
except NameError:
	pass
	
bitmapTemplate = BitmapTemplate()
bitmapTemplate.SetDocStrings('\nBitmap\nBitmap\nBitmap (*.bmp)\n.bmp\nPythonBitmapFileType\nPython Bitmap File')
win32ui.GetApp().AddDocTemplate(bitmapTemplate)

# This works, but just didnt make it through the code reorg.
#class PPMBitmap(Bitmap):
#	def LoadBitmapFile(self, file ):
#		magic=file.readline()
#		if magic <> "P6\n":
#			raise TypeError, "The file is not a PPM format file"
#		rowcollist=string.split(file.readline())
#		cols=string.atoi(rowcollist[0])
#		rows=string.atoi(rowcollist[1])
#		file.readline()	# whats this one?
#		self.bitmap.LoadPPMFile(file,(cols,rows))


def t():
	bitmapTemplate.OpenDocumentFile('d:\\winnt\\arcade.bmp')
	#OpenBMPFile( 'd:\\winnt\\arcade.bmp')

def demo():
	import glob
	winDir=win32api.GetWindowsDirectory()
	for fileName in glob.glob1(winDir, '*.bmp')[:2]:
		bitmapTemplate.OpenDocumentFile(os.path.join(winDir, fileName))