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/**
Copyright(c) Microsoft Open Technologies, Inc.All rights reserved.
The MIT License(MIT)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
**/
using System;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Data;
namespace OnScreenKeyboardSample
{
public class BoolToSolidBrushConverter : IValueConverter
{
/// <summary>
/// Convert from source-type to target-type
/// </summary>
public object Convert(object value, Type targetType, object parameter, string str)
{
if ((bool)value)
{
return new SolidColorBrush(Windows.UI.Color.FromArgb(128,128,128,128));
}
else
{
return new SolidColorBrush(Windows.UI.Color.FromArgb(255,128,128,128));
}
}
/// <summary>
/// Convert-back from target to source.
/// </summary>
public object ConvertBack(object value, Type targetType, object parameter, string str)
{
return null;
}
}
public class KeyboardViewModel : ViewModel
{
#region constructor
public KeyboardViewModel(OnScreenKeyBoard container)
{
this.container = container;
KeyModel.theKeyboardViewModel = this;
}
#endregion constructor
#region Commanding
#region BackspaceCommand
public RelayCommand BackspaceCommand
{
get
{
if (backspaceCommand == null)
{
backspaceCommand = new RelayCommand((x) => ExecuteBackspaceCommand());
}
return backspaceCommand;
}
}
public void ExecuteBackspaceCommand()
{
int currentSelectionStart = OnScreenKeyBoard.Buffer.SelectionStart;
int currentSelectionLength = OnScreenKeyBoard.Buffer.SelectionLength;
if (currentSelectionLength != 0)
{
container.OutputString = container.OutputString.Remove(currentSelectionStart, currentSelectionLength);
OnScreenKeyBoard.Buffer.SelectionLength = 0;
}
else if (OnScreenKeyBoard.Buffer.SelectionStart > 0)
{
container.OutputString = container.OutputString.Remove(currentSelectionStart - 1, 1);
if (OnScreenKeyBoard.Buffer.SelectionStart > 0)
{
OnScreenKeyBoard.Buffer.SelectionStart--;
}
}
}
private RelayCommand backspaceCommand;
#endregion BackspaceCommand
#region CapsLockCommand
public RelayCommand CapsLockCommand
{
get
{
if (capsLockCommand == null)
{
capsLockCommand = new RelayCommand((x) => ExecuteCapsLockCommand());
}
return capsLockCommand;
}
}
#region ExecuteCapsLockCommand
/// <summary>
/// Execute the CapsLockCommand, which ocurrs when the user clicks on the CAPS button.
/// </summary>
public void ExecuteCapsLockCommand()
{
if (IsCapsLock)
{
IsCapsLock = false;
}
else
{
IsCapsLock = true;
}
}
#endregion
private RelayCommand capsLockCommand;
#endregion CapsLockCommand
#region KeyPressedCommand
public RelayCommand KeyPressedCommand
{
get
{
if (keyPressedCommand == null)
{
keyPressedCommand = new RelayCommand((x) => ExecuteKeyPressedCommand(x));
}
return keyPressedCommand;
}
}
#region ExecuteKeyPressedCommand
/// <summary>
/// Execute the KeyPressedCommand.
/// </summary>
/// <param name="arg">The KeyModel of the key-button that was pressed</param>
public void ExecuteKeyPressedCommand(object arg)
{
if (arg != null && arg.ToString() == "\n")
{
var webViewHost = container.GetHost() as DigitalSignageUAP.BrowserPage;
webViewHost.RenderPage();
return;
}
if (container.OutputString != null)
{
int currentSelectionStart = OnScreenKeyBoard.Buffer.SelectionStart;
int currentSelectionLength = OnScreenKeyBoard.Buffer.SelectionLength;
if (currentSelectionLength != 0)
{
container.OutputString = container.OutputString.Remove(currentSelectionStart, currentSelectionLength);
OnScreenKeyBoard.Buffer.SelectionLength = 0;
}
container.OutputString = container.OutputString.Insert(currentSelectionStart, (string)arg);
OnScreenKeyBoard.Buffer.SelectionStart++;
//Return to un-shift mode if currently in shift mode
if (IsShiftLock)
{
IsShiftLock = false;
}
}
}
#endregion
private RelayCommand keyPressedCommand;
#endregion KeyPressedCommand
#region ShiftCommand
public RelayCommand ShiftCommand
{
get
{
if (shiftCommand == null)
{
shiftCommand = new RelayCommand((x) => ExecuteShiftCommand());
}
return shiftCommand;
}
}
#region ExecuteShiftCommand
/// <summary>
/// Execute the ShiftCommand, which ocurrs when the user clicks on the SHIFT key.
/// </summary>
public void ExecuteShiftCommand()
{
ToggleShiftState();
}
#endregion
private RelayCommand shiftCommand;
#endregion ShiftCommand
#endregion Commanding
#region Methods
#region NotifyTheIndividualKeys
/// <summary>
/// Make the individual key-button view models notify their views that their properties have changed.
/// </summary>
public void NotifyTheIndividualKeys(string notificationText)
{
if (KB != null && KB.KeyAssignments != null)
{
if (notificationText != null)
{
foreach (var keyModel in KB.KeyAssignments)
{
if (keyModel != null)
{
keyModel.Notify(notificationText);
}
}
}
}
}
#endregion
#region ToggleShiftState
/// <summary>
/// Turn the shift-lock mode off if it's on, and on if it's off.
/// </summary>
public void ToggleShiftState()
{
if (IsShiftLock)
{
IsShiftLock = false;
}
else
{
IsShiftLock = true;
}
}
#endregion
#endregion Methods
#region Properties
#region IsCapsLock
/// <summary>
/// Get/set whether the VirtualKeyboard is currently is Caps-Lock mode.
/// </summary>
public bool IsCapsLock
{
get
{
return isCapsLock;
}
set
{
if (value != isCapsLock)
{
isCapsLock = value;
if (IsShiftLock)
{
IsShiftLock = false;
}
else
{
NotifyTheIndividualKeys("Text");
}
Notify("IsCapsLock");
}
}
}
#endregion
#region IsShiftLock
/// <summary>
/// Get/set whether the VirtualKeyboard is currently is Shift-Lock mode.
/// </summary>
public bool IsShiftLock
{
get
{
return shiftKey.IsInShiftState;
}
set
{
if (value != shiftKey.IsInShiftState)
{
shiftKey.IsInShiftState = value;
NotifyTheIndividualKeys("Text");
Notify("IsShiftLock");
}
}
}
#endregion
#region KB
/// <summary>
/// Get/set the specific subclass of KeyAssignmentSet that is currently attached to this keyboard.
/// </summary>
public KeyAssignmentSet KB
{
get
{
if (_currentKeyboardAssignment == null)
{
_currentKeyboardAssignment = KeyAssignmentSet.KeyAssignment;
}
return _currentKeyboardAssignment;
}
}
#endregion
#region The view-model properties for the individual key-buttons of the keyboard
public KeyModel TabKey
{
get { return Tab; }
set { Tab = value; }
}
public KeyModel EnterKey
{
get { return Enter; }
set { Enter = value; }
}
public ShiftKeyViewModel ShiftKey
{
get { return shiftKey; }
}
#endregion The view-model properties for the individual key-buttons of the keyboard
#region TheKeyModels array
/// <summary>
/// Get the array of KeyModels from the KB that comprise the view-models for the keyboard key-buttons
/// </summary>
public KeyModel[] TheKeyModels
{
get
{
if (KB != null)
{
return KB.KeyAssignments;
}
return null;
}
}
#endregion
#endregion Properties
#region fields
private bool isCapsLock;
/// <summary>
/// The KeyAssignmentSet that is currently attached to this keyboard.
/// </summary>
private KeyAssignmentSet _currentKeyboardAssignment;
// These are view-models for the individual key-buttons of the keyboard which are not provided by the KeyAssignmentSet:
private KeyModel Tab = new KeyModel('\t', '\t');
private KeyModel Enter = new KeyModel('\n', '\n');
private ShiftKeyViewModel shiftKey = new ShiftKeyViewModel();
private OnScreenKeyBoard container = null;
#endregion fields
}
}