# HG changeset patch
# User Laman
# Date 2017-04-08 11:42:05
# Node ID 4c1ba49ea8592d73f26d91a053a6d921555e9c19
# Parent  f85a79f2fd95b445b2ddc5568b81f8c43eef73d2

walking through the frames

diff --git a/src/config.py b/src/config.py
--- a/src/config.py
+++ b/src/config.py
@@ -10,7 +10,7 @@ with open(os.path.join(os.path.dirname(_
 class misc:
 	file=cfgFile["misc"]
 	version=(0,0,0)
-	defaultImage=file.get("defaultImage", "1.jpg")
+	defaultImage=file.get("defaultImage", 0)
 
 class gui:
 	file=cfgFile["gui"]
diff --git a/src/core.py b/src/core.py
--- a/src/core.py
+++ b/src/core.py
@@ -19,12 +19,15 @@ class Core:
 		self._ownMessages=MsgQueue(self._handleEvent)
 		self._guiMessages=MsgQueue()
 
-		imgPath=os.path.join(os.path.dirname(__file__), "..","images",cfg.misc.defaultImage)
+		self._imgDir=os.path.join(os.path.dirname(__file__), "..","images")
+		self._imgs=sorted(os.listdir(self._imgDir))
+		self._imgIndex=cfg.misc.defaultImage
+		imgPath=os.path.join(self._imgDir,self._imgs[self._imgIndex])
 		self._frame=PIL.Image.open(imgPath)
 
 		self._guiProc=multiprocessing.Process(name="gui", target=gui, args=(self._guiMessages,self._ownMessages))
 		self._guiProc.start()
-		self._guiMessages.send("setCurrentFrame",(self._frame.copy(),))
+		self.relativeFrame(0)
 
 	def setCorners(self,corners):
 		self.detector.setGridCorners(corners)
@@ -37,6 +40,12 @@ class Core:
 		if self.detector.analyze(self._frame):
 			self._guiMessages.send("setGameState",(self.detector.board,))
 
+	def relativeFrame(self,step):
+		self._imgIndex=(self._imgIndex+step)%len(self._imgs)
+		imgPath=os.path.join(self._imgDir,self._imgs[self._imgIndex])
+		self._frame=PIL.Image.open(imgPath)
+		self._guiMessages.send("setCurrentFrame",(self._frame.copy(),))
+
 	def listen(self):
 		listenerThread=threading.Thread(target=lambda: self._ownMessages.listen())
 		listenerThread.start()
@@ -46,7 +55,12 @@ class Core:
 		self._ownMessages.send("!kill")
 
 	def _handleEvent(self,e):
-		actions={"setCorners":self.setCorners, "setTresholds":self.setTresholds}
+		actions={
+			"setCorners": self.setCorners,
+			"setTresholds": self.setTresholds,
+			"prevFrame": lambda: self.relativeFrame(-1),
+			"nextFrame": lambda: self.relativeFrame(1)
+		}
 		(actionName,args,kwargs)=e
 
 		return actions[actionName](*args,**kwargs)
diff --git a/src/gui/__init__.py b/src/gui/__init__.py
--- a/src/gui/__init__.py
+++ b/src/gui/__init__.py
@@ -18,7 +18,8 @@ class GUI:
 		self.root.rowconfigure(0,weight=1)
 
 		self.root.bind("<<redrawImgView>>", lambda e: self.mainWindow.redrawImgView())
-		self.root.bind("<<receiveState>>", lambda e: print("fired receiveState"))
+		self.root.bind("<Left>",lambda e: self.sendMsg("prevFrame"))
+		self.root.bind("<Right>",lambda e: self.sendMsg("nextFrame"))
 
 	def __call__(self,ownMessages,coreMessages):
 		self._coreMessages=coreMessages
diff --git a/src/gui/imgview.py b/src/gui/imgview.py
--- a/src/gui/imgview.py
+++ b/src/gui/imgview.py
@@ -31,7 +31,7 @@ class ImgView(ResizableCanvas):
 		if self._img:
 			img=self._img.copy()
 			img.thumbnail((int(self._width),int(self._height)))
-			self._tkImg=ImageTk.PhotoImage(img) # just to save the image from the garbage collector
+			self._tkImg=ImageTk.PhotoImage(img) # just to save the image from garbage collector
 			self.create_image(self._width//2, self._height//2, anchor="center", image=self._tkImg)
 
 		for corner in self._corners.corners:
@@ -62,7 +62,6 @@ class ImgView(ResizableCanvas):
 		self._imgSizeCoef=max(widthRatio,heightRatio)
 
 		self._img=img
-		self.configure(width=wo,height=ho)
 
 	## Stores a grid corner located at x,y coordinates.
 	def addCorner(self,x,y):
diff --git a/src/gui/mainwindow.py b/src/gui/mainwindow.py
--- a/src/gui/mainwindow.py
+++ b/src/gui/mainwindow.py
@@ -13,6 +13,9 @@ class MainWindow(tk.Frame):
 		self.grid(column=0,row=0,sticky=(N,S,E,W))
 		self._createWidgets()
 
+		self.bind("<Left>",lambda e: self.sendMsg("prevFrame"))
+		self.bind("<Right>",lambda e: self.sendMsg("nextFrame"))
+
 	def setCurrentFrame(self,frame):
 		self.imgView.setImg(frame)