public double GetMouseToKeyboardTransitionCost(KeyDownEvent keyDownEvent)
{
PhysicalKey key = FindKey(keyDownEvent.Data);
if (key != null)
{
KeyboardSection parentSection = key.ParentSection;
if (parentSection.Handedness == Handedness.Right)
{
lastMouseHandedAction = ActionType.Keyboard;
if (MousePad == null)
{
throw new Exception("MousePad not specified.");
}
if (mousePadCenter.X == double.MinValue)
{
CalculateMousePadCenterPoint();
}
double travelDistance = MillerComplexity.GetDistance(parentSection.Center, mousePadCenter);
double targetApproachWidth = MillerComplexity.GetTargetApproachWidth(key.Size.Width, key.Size.Height);
return(MillerComplexity.GetTargetPressScore(travelDistance, targetApproachWidth));
}
}
return(0);
}
const double DBL_FingerPadRadius = 0.7d; // Average radius of human finger pad, in cm
public PhysicalKey(string name, Sides exposedEdges, Size size, KeyboardSection parentSection)
{
ParentSection = parentSection;
Size = size;
ExposedEdges = exposedEdges;
Name = name;
}
KeyboardSection GetEscape()
{
KeyboardSection escapeSection = new KeyboardSection(new Point(3.1, 4.3), new Size(2.4, 1.9), Handedness.Left);
escapeSection.Add(Keys.Escape, Sides.Bottom | Sides.Left | Sides.Right | Sides.Top, KeySize.Escape);
return(escapeSection);
}
/// <summary>
/// Initializes a new instance of the MicrosoftNaturalKeyboard class.
/// </summary>
public MicrosoftNaturalKeyboard()
{
KeyboardSection.StandardKeySize = KeySize.StandardKey;
homeKeysLeft = GetHomeKeysLeft();
homeKeysRight = GetHomeKeysRight();
punctuationKeysRight = GetPunctuationKeys();
extendedKeys = GetExtendedNavKeys();
functionKeysRight = GetFunctionKeysRight();
numPadKeys = GetNumPadKeys();
numPadTopRowOperators = GetNumPadTopRowOperators();
arrowKeys = GetArrowKeys();
keyboardSections.Add(arrowKeys);
keyboardSections.Add(GetFunctionKeysLeft());
keyboardSections.Add(functionKeysRight);
keyboardSections.Add(homeKeysLeft);
keyboardSections.Add(homeKeysRight);
keyboardSections.Add(GetNumKeysLeft());
keyboardSections.Add(GetNumKeysRight());
keyboardSections.Add(extendedKeys);
keyboardSections.Add(numPadKeys);
keyboardSections.Add(numPadTopRowOperators);
keyboardSections.Add(GetSpaceBar());
keyboardSections.Add(GetEscape());
keyboardSections.Add(GetLeftKeyColumn());
keyboardSections.Add(GetLeftModifiers());
keyboardSections.Add(GetRightModifiers());
keyboardSections.Add(GetWebSearchMailKeys());
keyboardSections.Add(punctuationKeysRight);
}
KeyboardSection GetSpaceBar()
{
KeyboardSection spaceBarSection = new KeyboardSection(new Point(16.7, 17.2), new Size(14.7, 4.8), Handedness.Both);
spaceBarSection.Add(Keys.Space, Sides.Bottom, KeySize.Space);
return(spaceBarSection);
}
public double GetReachingForMouseTransitionCost()
{
if (MousePad == null)
{
throw new Exception("MousePad not specified.");
}
if (mousePadCenter.X == double.MinValue)
{
CalculateMousePadCenterPoint();
}
if (MousePad.Mouse == null)
{
throw new Exception("Mouse not specified.");
}
KeyboardSection nearestSection = GetLastTouchedSectionClosestToMouse();
if (nearestSection == null)
{
throw new Exception("A keyboard section near the mouse was not found.");
}
double travelDistance = MillerComplexity.GetDistance(nearestSection.Center, mousePadCenter);
double targetApproachWidth = MousePad.Mouse.Width; // Mouse is nearly always approached from the left or right;
lastMouseHandedAction = ActionType.Mouse;
return(MillerComplexity.GetTargetPressScore(travelDistance, targetApproachWidth));
}
KeyboardSection GetNumPadTopRowOperators()
{
KeyboardSection punctuationKeys = new KeyboardSection(new Point(37.4, 5.9), new Size(5.8, 1.9), Handedness.Right);
punctuationKeys.Add(Keys.PrintScreen, Sides.Left | Sides.Top | Sides.Bottom);
punctuationKeys.Add(Keys.Scroll, Sides.Top | Sides.Bottom);
punctuationKeys.Add(Keys.Pause, Sides.Right | Sides.Top | Sides.Bottom);
return(punctuationKeys);
}
KeyboardSection GetWebSearchMailKeys()
{
KeyboardSection webSearchMailKeys = new KeyboardSection(new Point(6.1, 2.2), new Size(6.5, 1.0), Handedness.Left);
webSearchMailKeys.Add(Keys.BrowserHome, Sides.Left | Sides.Top | Sides.Bottom);
webSearchMailKeys.Add(Keys.BrowserSearch, Sides.Top | Sides.Bottom);
webSearchMailKeys.Add(Keys.LaunchMail, Sides.Right | Sides.Top | Sides.Bottom);
return(webSearchMailKeys);
}
KeyboardSection GetRightModifiers()
{
KeyboardSection rightModifiers = new KeyboardSection(new Point(28.9, 15.5), new Size(10.0, 5.3), Handedness.Right);
rightModifiers.Add(Keys.RShiftKey, Sides.Right, KeySize.RightShift);
rightModifiers.Add(Keys.RControlKey, Sides.Right | Sides.Bottom, KeySize.Ctrl);
rightModifiers.Add(Keys.Apps, Sides.Bottom, KeySize.ContextMenu);
rightModifiers.Add(Keys.RMenu, Sides.Bottom, KeySize.RightAlt);
return(rightModifiers);
}
KeyboardSection GetNumKeysRight()
{
KeyboardSection numKeysRight = new KeyboardSection(new Point(37.2, 9.2), new Size(5.8, 5.5), Handedness.Right);
numKeysRight.Add(Keys.D7, Sides.Top | Sides.Left, KeySize.D7);
numKeysRight.Add(Keys.D8, Sides.Top);
numKeysRight.Add(Keys.D9, Sides.Top);
numKeysRight.Add(Keys.D0, Sides.Top);
return(numKeysRight);
}
KeyboardSection GetArrowKeys()
{
KeyboardSection arrowKeys = new KeyboardSection(new Point(37.1, 14.7), new Size(6.2, 5.2), Handedness.Right);
arrowKeys.Add(Keys.Left, Sides.Left | Sides.Top | Sides.Bottom);
arrowKeys.Add(Keys.Up, Sides.Left | Sides.Top | Sides.Right);
arrowKeys.Add(Keys.Right, Sides.Bottom | Sides.Top | Sides.Right);
arrowKeys.Add(Keys.Down, Sides.Bottom);
return(arrowKeys);
}
KeyboardSection GetLeftModifiers()
{
KeyboardSection leftModifiers = new KeyboardSection(new Point(5.3, 14.8), new Size(8.6, 6.8), Handedness.Left);
leftModifiers.Add(Keys.LShiftKey, Sides.Left, KeySize.LeftShift);
leftModifiers.Add(Keys.LControlKey, Sides.Left | Sides.Bottom, KeySize.Ctrl);
leftModifiers.Add(Keys.LWin, Sides.Bottom, KeySize.Windows);
leftModifiers.Add(Keys.LMenu, Sides.Bottom, KeySize.LeftAlt);
return(leftModifiers);
}
KeyboardSection GetLeftKeyColumn()
{
KeyboardSection leftKeyColumn = new KeyboardSection(new Point(2.6, 8.2), new Size(3.9, 5.9), Handedness.Left);
leftKeyColumn.Add(Keys.Oemtilde, Sides.Left | Sides.Top, KeySize.Tilde);
leftKeyColumn.Add(Keys.Tab, Sides.Left, KeySize.Tab);
leftKeyColumn.Add(Keys.Capital, Sides.Left, KeySize.CapsLock);
leftKeyColumn.Add(Keys.CapsLock, Sides.Left, KeySize.CapsLock);
return(leftKeyColumn);
}
KeyboardSection GetFunctionKeysLeft()
{
KeyboardSection functionKeysLeft = new KeyboardSection(new Point(10.25, 5.5), new Size(9.4, 3.7), Handedness.Left);
functionKeysLeft.Add(Keys.F1, Sides.Left | Sides.Top | Sides.Bottom);
functionKeysLeft.Add(Keys.F2, Sides.Top | Sides.Bottom);
functionKeysLeft.Add(Keys.F3, Sides.Top | Sides.Bottom);
functionKeysLeft.Add(Keys.F4, Sides.Top | Sides.Bottom);
functionKeysLeft.Add(Keys.F5, Sides.Top | Sides.Bottom | Sides.Right);
return(functionKeysLeft);
}
KeyboardSection GetNumKeysLeft()
{
KeyboardSection numKeysLeft = new KeyboardSection(new Point(23.3, 12.7), new Size(9.7, 5.5), Handedness.Left);
numKeysLeft.Add(Keys.D1, Sides.Top);
numKeysLeft.Add(Keys.D2, Sides.Top);
numKeysLeft.Add(Keys.D3, Sides.Top);
numKeysLeft.Add(Keys.D4, Sides.Top);
numKeysLeft.Add(Keys.D5, Sides.Top);
numKeysLeft.Add(Keys.D6, Sides.Top | Sides.Right);
return(numKeysLeft);
}
KeyboardSection GetExtendedNavKeys()
{
KeyboardSection extendedNavKeys = new KeyboardSection(new Point(23.3, 12.7), new Size(9.7, 4.1), Handedness.Right);
extendedNavKeys.Add(Keys.Insert, Sides.Top | Sides.Left);
extendedNavKeys.Add(Keys.Home, Sides.Top);
extendedNavKeys.Add(Keys.PageUp, Sides.Top | Sides.Right);
extendedNavKeys.Add(Keys.Delete, Sides.Left | Sides.Bottom);
extendedNavKeys.Add(Keys.End, Sides.Bottom);
extendedNavKeys.Add(Keys.PageDown, Sides.Bottom | Sides.Right);
return(extendedNavKeys);
}
KeyboardSection GetFunctionKeysRight()
{
KeyboardSection functionKeysRight = new KeyboardSection(new Point(25.4, 6), new Size(13.4, 2.0), Handedness.Right);
functionKeysRight.Add(Keys.F6, Sides.Left | Sides.Top | Sides.Bottom);
functionKeysRight.Add(Keys.F7, Sides.Top | Sides.Bottom);
functionKeysRight.Add(Keys.F8, Sides.Top | Sides.Bottom);
functionKeysRight.Add(Keys.F9, Sides.Top | Sides.Bottom);
functionKeysRight.Add(Keys.F10, Sides.Top | Sides.Bottom);
functionKeysRight.Add(Keys.F11, Sides.Top | Sides.Bottom);
functionKeysRight.Add(Keys.F12, Sides.Top | Sides.Bottom);
return(functionKeysRight);
}
KeyboardSection GetPunctuationKeys()
{
KeyboardSection punctuationKeys = new KeyboardSection(new Point(29.2, 11.0), new Size(9.2, 7.9), Handedness.Right);
punctuationKeys.Add(Keys.OemPeriod);
punctuationKeys.Add(Keys.OemQuestion);
punctuationKeys.Add(Keys.OemMinus, Sides.Top);
punctuationKeys.Add(Keys.Oemplus, Sides.Top);
punctuationKeys.Add(Keys.Oemcomma);
punctuationKeys.Add(Keys.OemOpenBrackets);
punctuationKeys.Add(Keys.Oem7);
punctuationKeys.Add(Keys.Oem6);
punctuationKeys.Add(Keys.Oem5, Sides.Right); // backslash key
punctuationKeys.Add(Keys.Oem1);
punctuationKeys.Add(Keys.Back, Sides.Top | Sides.Right, KeySize.Backspace);
punctuationKeys.Add(Keys.Enter, Sides.Right, KeySize.Enter);
return(punctuationKeys);
}
KeyboardSection GetHomeKeysRight()
{
KeyboardSection homeKeysRight = new KeyboardSection(new Point(23.3, 12.7), new Size(9.7, 5.5), Handedness.Right);
homeKeysRight.Add(Keys.Y, Sides.Left);
homeKeysRight.Add(Keys.U);
homeKeysRight.Add(Keys.I);
homeKeysRight.Add(Keys.O);
homeKeysRight.Add(Keys.P);
homeKeysRight.Add(Keys.H, Sides.Left, KeySize.H);
homeKeysRight.Add(Keys.J);
homeKeysRight.Add(Keys.K);
homeKeysRight.Add(Keys.L);
homeKeysRight.Add(Keys.N, Sides.Left, KeySize.N);
homeKeysRight.Add(Keys.M);
return(homeKeysRight);
}
PhysicalKey FindKey(string keyName)
{
PhysicalKey key;
if (keyName.Length == 1 && char.IsDigit(keyName, 0))
{
keyName = "D" + keyName;
}
const string Key_Enter = "Enter";
if (keyName == Key_Enter && lastRightKeyPressed != null)
{
// The Enter key appears twice on the MS Natural keyboard. Find it in the right section based on the closest section of the last key hit.
KeyboardSection parentSection = lastRightKeyPressed.ParentSection;
if (parentSection == numPadKeys || parentSection == numPadTopRowOperators)
{
key = numPadKeys.FindKey(Key_Enter);
}
else
{
key = punctuationKeysRight.FindKey(Key_Enter);
}
if (key != null)
{
return(key);
}
}
foreach (KeyboardSection keyboardSection in keyboardSections)
{
key = keyboardSection.FindKey(keyName);
if (key != null)
{
return(key);
}
}
return(null);
}
KeyboardSection GetLastTouchedSectionClosestToMouse()
{
KeyboardSection nearestSection = null;
switch (MousePadPosition)
{
case Handedness.Left:
if (lastLeftKeyPressed != null)
{
nearestSection = lastLeftKeyPressed.ParentSection;
}
else
{
nearestSection = homeKeysLeft;
}
break;
case Handedness.Right:
if (lastRightKeyPressed != null)
{
nearestSection = lastRightKeyPressed.ParentSection;
}
else
{
nearestSection = homeKeysRight;
}
break;
case Handedness.Both:
if (lastAmbidextrousKeyPressed != null)
{
nearestSection = lastAmbidextrousKeyPressed.ParentSection;
}
else
{
nearestSection = homeKeysRight;
}
break;
}
return(nearestSection);
}
KeyboardSection GetHomeKeysLeft()
{
KeyboardSection homeKeysLeft = new KeyboardSection(new Point(10, 11.85), new Size(9.6, 5.4), Handedness.Left);
homeKeysLeft.Add(Keys.Q);
homeKeysLeft.Add(Keys.W);
homeKeysLeft.Add(Keys.E);
homeKeysLeft.Add(Keys.R);
homeKeysLeft.Add(Keys.T, Sides.Right, KeySize.T);
homeKeysLeft.Add(Keys.A);
homeKeysLeft.Add(Keys.S);
homeKeysLeft.Add(Keys.D);
homeKeysLeft.Add(Keys.F);
homeKeysLeft.Add(Keys.G, Sides.Right, KeySize.G);
homeKeysLeft.Add(Keys.Z);
homeKeysLeft.Add(Keys.X);
homeKeysLeft.Add(Keys.C);
homeKeysLeft.Add(Keys.V);
homeKeysLeft.Add(Keys.B, Sides.Right);
return(homeKeysLeft);
}
KeyboardSection GetNumPadKeys()
{
KeyboardSection numPadKeys = new KeyboardSection(new Point(44.4, 12.2), new Size(7.75, 9.6), Handedness.Right);
numPadKeys.Add(Keys.NumLock, Sides.Left | Sides.Top);
numPadKeys.Add(Keys.Divide, Sides.Top);
numPadKeys.Add(Keys.Multiply, Sides.Top);
numPadKeys.Add(Keys.Subtract, Sides.Top | Sides.Right);
numPadKeys.Add(Keys.NumPad7, Sides.Left);
numPadKeys.Add(Keys.NumPad8);
numPadKeys.Add(Keys.NumPad9);
numPadKeys.Add(Keys.Add, Sides.Right, KeySize.Add);
numPadKeys.Add(Keys.NumPad4, Sides.Left);
numPadKeys.Add(Keys.NumPad5);
numPadKeys.Add(Keys.NumPad6);
numPadKeys.Add(Keys.NumPad1, Sides.Left);
numPadKeys.Add(Keys.NumPad2);
numPadKeys.Add(Keys.NumPad3);
numPadKeys.Add(Keys.Enter, Sides.Right | Sides.Bottom, KeySize.NumPadEnter);
numPadKeys.Add(Keys.NumPad0, Sides.Left | Sides.Bottom, KeySize.NumPad0);
numPadKeys.Add(Keys.Delete);
return(numPadKeys);
}
/// <summary>
/// Determines the approximate travel distance between keys by measuring the travel distance
/// between the parenting sections of the two keys.
/// </summary>
double GetApproximateDistanceBetweenKeys(PhysicalKey key1, PhysicalKey key2)
{
KeyboardSection section = key2.ParentSection;
return(GetApproximateDistanceToKey(section, key1));
}
/// <summary>
/// Returns the distance between the center of the specified section to the center of the section
/// holding the specified key.
/// </summary>
double GetApproximateDistanceToKey(KeyboardSection section, PhysicalKey key1)
{
double distanceBetweenPoints = GetDistanceBetweenPoints(key1.ParentSection.Center, section.Center);
return(Math.Max(distanceBetweenPoints, DBL_MinimumDistanceBetweenKeys));
}
