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from ctypes import WinDLL, byref,c_int,c_char

class LcdHandler(object):
    
    def __init__(self,devNum):
        self.__lcd = WinDLL("luise.dll")
        self.__devNum = devNum
    
    # convert the returncode into an string
    def _checkReturnCode(self,rc):
        
        if (rc == 0):
            return "ok"
        elif (rc == 1):
            return "can't open USB-Device"
        elif (rc == 2):
            return "USB write error"
        elif (rc == 3):
            return "USB read error"
        elif (rc == 4):
            return "file doesn't exist"
        elif (rc == 5):
            return "faulty file"
        elif (rc == 5):
            return "out of range"
        else:
            return "Unknown Display RC"   
    
    # Get Version of the used luise.dll    
    def getDll(self):
        return self.__lcd.GetDllVersion()
    
    # Open LCD Device    
    def openDevice(self):
        return self._checkReturnCode(self.__lcd.LUI_OpenDevice(self.__devNum))
    
    # Close LCD Device
    def closeDevice(self):
        return _checkReturnCode(self.__lcd.LUI_CloseDevice(self.__devNum))
    
    # Configure LCD Mode
    def lcdMode(self,gfxMode=0,gfxInvert=0,screenRotation=0,ioRefresh=2):
        return _checkReturnCode(self.__lcd.LUI_LCDmode(self.__devNum,gfxMode,gfxInvert,screenRotation,ioRefresh))
    
    # Set Text on LCD
    def setText(self,screenPosX,screenPosY,textFieldWidth,textFieldHight,transparency,fontFileName,fontWidthSpace,fontHightSpace,textdata):
        return _checkReturnCode(self.__lcd.LUI_Text(self.__devNum,screenPosX,screenPosY,textFieldWidth,textFieldHight,transparency,fontFileName,fontWidthSpace,fontHightSpace,textdata))
    
    # TODO: Check how to handle pointer to charater array in python
    
    # Load Bitmap
    def setBitmap(self,screenNr,screenPosX,screenPosY,bmpOffsetX,bmpOffsetY,bmpWidth,bmpHight,bmpDataWidth,bmpDataHight,bmpData):
        return _checkReturnCode(self.__lcd.LUI_Bitmap(self.__devNum,screenNr,screenPosX,screenPosY,bmpOffsetX,bmpOffsetY,bmpWidth,bmpHight,bmpDataWidth,bmpDataHight,bmpData))
    
    # Load Bitmap from File
    def setBitmapFile(self,screenNr,screenPosX,screenPosY,bmpOffsetX,bmpOffsetY,bmpWidth,bmpHight,bmpFile):
        return _checkReturnCode(self.__lcd.LUI_BMPfile(self.__devNum,screenNr,screenPosX,screenPosY,bmpOffsetX,bmpOffsetY,bmpWidth,bmpHight,bmpFile))
    
    # Set the state of a single Pixel
    def setPixel(self,screenNr,screenPosX,screenPoxY,state):
        return _checkReturnCode(self.__lcd.LUI_SetPixel(self.__devNum,screenNr,screenPosX,screenPoxY,state))
    
    # Get the state of a single Pixel
    def getPixel(self,screenNr,screenPosX,screenPoxY,state):
        state = c_char()
        return _checkReturnCode(self.__lcd.LUI_GetPixel(self.__devNum,screenNr,screenPosX,screenPoxY,byref(state))), ord(state.value)
    
    # Turn Display on or off
    def displayOnOff(self,value):
        return _checkReturnCode(self.__lcd.LUI_DispOnOff(self.__devNum,value))
    
    # Turn Displaylight on or off
    def ccflOnOff(self,value):
        return _checkReturnCode(self.__lcd.LUI_CCFL(self.__devNum,value))
    
    # Get the Contrast Value of the Display
    def getContrast(self):
        contrast = c_char()
        return _checkReturnCode(self.__lcd.LUI_GetContrast(self.__devNum,byref(contrast))), ord(contrast.value)
    
    # Set the Contrast Value of the Display
    def setContrast(self,value):
        return _checkReturnCode(self.__lcd.LUI_SetContrast(self.__devNum,value))
        
    # Get the Data of the Input Ports (LUI v1 only)
    def getInport(self):
        portData = c_char()
        return _checkReturnCode(self.__lcd.LUI_InPort(self.__devNum,byref(portData))), ord(portData)
    
    # Set the Data of the Output Ports
    def setOutport(self,portData):
        return _checkReturnCode(self.__lcd.LUI_OutPort(self.__devNum,portData))
    
    # Get the Serial of the Display Device
    def getSerial(self):
        serial = c_int()
        return _checkReturnCode(self.__lcd.LUI_GetSerial(self.__devNum,byref(serial))), serial
    
    # Set the Screen Refresh Control
    def setScreenRefresh(self,gfxScreen0,gfxScreen1,txtScreen):
        return _checkReturnCode(self.__lcd.LUI_ScreenRefreshControl(self.__devNum,gfxScreen0,gfxScreen1,txtScreen))
    
    # Get the state of the TouchScreen
    def getTS(self):
        tsDataType = c_int * 3
        tsData = tsDataType()
        return _checkReturnCode(self.__lcd.LUI_TouchScreen(self.__devNum,byref(tsData))), tsData

Code: Alles auswählen

class Foo(object):
    def foo(self):
        return "foo"

    def bar(self):
        return foo()

Code: Alles auswählen

def _checkReturnCode(rc):
    return {
        0 : "ok",
        1 : "can't open USB-Device",
        2 : "USB write error",
        3 : "USB read error",
        4 : "file doesn't exist",
        5 : "faulty file",
        5 : "out of range",
    }.get(rc, "Unknown Display RC")