/
WheelSizeDisplayProcessor.cs
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/
WheelSizeDisplayProcessor.cs
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using System;
using GHIElectronics.NETMF.FEZ;
using GHIElectronics.NETMF.Hardware;
using Grommet.Ext;
using NetMf.CommonExtensions;
namespace BikeComputer
{
class WheelSizeDisplayProcessor : IDisplayProcessor
{
enum EndEditEnum
{
Approving,
Cancelling,
NotEditing
}
const int WHEEL_SIZE_POSITION_0 = 0;
const int WHEEL_SIZE_POSITION_1 = 1;
const int WHEEL_SIZE_POSITION_2 = 2;
const int EXIT_CHAR_POSITION = 3;
private BikeData bikeData = null;
private bool isInitialised = false;
private bool isEditing = false;
private char[] editingText = new char[3];
private int editingPosition = WHEEL_SIZE_POSITION_0;
private EndEditEnum approving = EndEditEnum.NotEditing;
private bool blink = false;
public WheelSizeDisplayProcessor(BikeData inBikeData)
{
bikeData = inBikeData;
}
private void Initialise()
{
if (!isInitialised)
{
if (bikeData.WheelSize > 999)
{
bikeData.WheelSize = 999;
}
string strValue = bikeData.WheelSize.ToString();
editingText[WHEEL_SIZE_POSITION_0] = strValue[WHEEL_SIZE_POSITION_0];
editingText[WHEEL_SIZE_POSITION_1] = strValue[WHEEL_SIZE_POSITION_1];
editingText[WHEEL_SIZE_POSITION_2] = strValue[WHEEL_SIZE_POSITION_2];
isInitialised = true;
}
}
public void Display()
{
Initialise();
FEZ_Shields.KeypadLCD.SetCursor(1, 0);
FEZ_Shields.KeypadLCD.Print("Wheel size:");
FEZ_Shields.KeypadLCD.SetCursor(1, 12);
char[] prepareText = new char[3];
prepareText[WHEEL_SIZE_POSITION_0] = editingText[WHEEL_SIZE_POSITION_0];
prepareText[WHEEL_SIZE_POSITION_1] = editingText[WHEEL_SIZE_POSITION_1];
prepareText[WHEEL_SIZE_POSITION_2] = editingText[WHEEL_SIZE_POSITION_2];
if (isEditing && blink && (editingPosition >= WHEEL_SIZE_POSITION_0 && editingPosition <= WHEEL_SIZE_POSITION_2))
{
prepareText[editingPosition] = ' ';
}
string strValue = new string(prepareText);
FEZ_Shields.KeypadLCD.Print(strValue);
FEZ_Shields.KeypadLCD.SetCursor(1, 15);
if (isEditing && blink && (editingPosition == EXIT_CHAR_POSITION))
{
FEZ_Shields.KeypadLCD.Print(" ");
}
else
{
switch (approving)
{
case EndEditEnum.Approving:
FEZ_Shields.KeypadLCD.Print(">");
break;
case EndEditEnum.Cancelling:
FEZ_Shields.KeypadLCD.Print("X");
break;
case EndEditEnum.NotEditing:
FEZ_Shields.KeypadLCD.Print(" ");
break;
}
}
blink = !blink;
}
public void ProcessKey(FEZ_Shields.KeypadLCD.Keys keyPressed)
{
switch (keyPressed)
{
case FEZ_Shields.KeypadLCD.Keys.Right:
editingPosition++;
if (editingPosition > EXIT_CHAR_POSITION)
{
editingPosition = EXIT_CHAR_POSITION;
}
break;
case FEZ_Shields.KeypadLCD.Keys.Left:
editingPosition--;
if (editingPosition < WHEEL_SIZE_POSITION_0)
{
editingPosition = WHEEL_SIZE_POSITION_0;
}
break;
case FEZ_Shields.KeypadLCD.Keys.Up:
if (editingPosition >= WHEEL_SIZE_POSITION_0 && editingPosition <= WHEEL_SIZE_POSITION_2)
{
char editedChar = editingText[editingPosition];
if (editedChar != '9')
{
editedChar++;
editingText[editingPosition] = editedChar;
}
}
else if (editingPosition == EXIT_CHAR_POSITION)
{
if (approving == EndEditEnum.Approving) approving = EndEditEnum.Cancelling;
else if (approving == EndEditEnum.Cancelling) approving = EndEditEnum.Approving;
}
break;
case FEZ_Shields.KeypadLCD.Keys.Down:
if (editingPosition >= WHEEL_SIZE_POSITION_0 && editingPosition <= WHEEL_SIZE_POSITION_2)
{
char editedChar = editingText[editingPosition];
if (editedChar != '0')
{
editedChar--;
editingText[editingPosition] = editedChar;
}
}
else if (editingPosition == EXIT_CHAR_POSITION)
{
if (approving == EndEditEnum.Approving) approving = EndEditEnum.Cancelling;
else if (approving == EndEditEnum.Cancelling) approving = EndEditEnum.Approving;
}
break;
case FEZ_Shields.KeypadLCD.Keys.Select:
if (editingPosition == EXIT_CHAR_POSITION)
{
if (approving == EndEditEnum.Approving)
{
string newValue = new string(editingText);
bikeData.WheelSize = int.Parse(newValue);
}
isEditing = false;
isInitialised = false;
approving = EndEditEnum.NotEditing;
}
break;
}
}
public bool IsProcessingKey()
{
return isEditing;
}
public void BeginEdit()
{
isEditing = true;
editingPosition = WHEEL_SIZE_POSITION_0;
approving = EndEditEnum.Approving;
}
public bool CanEditLine()
{
return true;
}
}
}