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/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Controls.Primitives;
using Xceed.Wpf.Toolkit.Core.Utilities;
#if VS2008
using Microsoft.Windows.Controls;
using Microsoft.Windows.Controls.Primitives;
#endif
namespace Xceed.Wpf.Toolkit.Primitives
{
[TemplatePart( Name = PART_Popup, Type = typeof( Popup ) )]
public class DateTimePickerBase : DateTimeUpDown
{
private const string PART_Popup = "PART_Popup";
#region Members
private Popup _popup;
private DateTime? _initialValue;
#endregion //Members
#region Properties
#region IsOpen
public static readonly DependencyProperty IsOpenProperty = DependencyProperty.Register( "IsOpen", typeof( bool ), typeof( DateTimePickerBase ), new UIPropertyMetadata( false, OnIsOpenChanged ) );
public bool IsOpen
{
get
{
return ( bool )GetValue( IsOpenProperty );
}
set
{
SetValue( IsOpenProperty, value );
}
}
private static void OnIsOpenChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
{
DateTimePickerBase dateTimePicker = ( DateTimePickerBase )d;
if( dateTimePicker != null )
dateTimePicker.OnIsOpenChanged( ( bool )e.OldValue, ( bool )e.NewValue );
}
protected virtual void OnIsOpenChanged( bool oldValue, bool newValue )
{
if( newValue )
_initialValue = Value;
}
#endregion //IsOpen
#region ShowDropDownButton
public static readonly DependencyProperty ShowDropDownButtonProperty = DependencyProperty.Register( "ShowDropDownButton", typeof( bool ), typeof( DateTimePickerBase ), new UIPropertyMetadata( true ) );
public bool ShowDropDownButton
{
get
{
return ( bool )GetValue( ShowDropDownButtonProperty );
}
set
{
SetValue( ShowDropDownButtonProperty, value );
}
}
#endregion //ShowDropDownButton
#endregion //Properties
#region Constructors
public DateTimePickerBase()
{
AddHandler( UIElement.KeyDownEvent, new KeyEventHandler( HandleKeyDown ), true );
Mouse.AddPreviewMouseDownOutsideCapturedElementHandler( this, OnMouseDownOutsideCapturedElement );
}
#endregion //Constructors
#region Base Class Overrides
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
if( _popup != null )
{
_popup.Opened -= this.Popup_Opened;
}
_popup = this.GetTemplateChild( PART_Popup ) as Popup;
if( _popup != null )
{
_popup.Opened += this.Popup_Opened;
}
}
#endregion //Base Class Overrides
#region Event Handlers
protected virtual void HandleKeyDown( object sender, KeyEventArgs e )
{
if( !IsOpen )
{
if( KeyboardUtilities.IsKeyModifyingPopupState( e ) )
{
IsOpen = true;
// Calendar will get focus in Calendar_Loaded().
e.Handled = true;
}
}
else
{
if( KeyboardUtilities.IsKeyModifyingPopupState( e ) )
{
ClosePopup( true );
e.Handled = true;
}
else if( e.Key == Key.Enter )
{
ClosePopup( true );
e.Handled = true;
}
else if( e.Key == Key.Escape )
{
// Avoid setting the "Value" property when no change has occurred.
// The original value may not be a local value. Setting
// it, even with the same value, will override a one-way binding.
if( !object.Equals( this.Value, _initialValue ) )
{
this.Value = _initialValue;
}
ClosePopup( true );
e.Handled = true;
}
}
}
private void OnMouseDownOutsideCapturedElement( object sender, MouseButtonEventArgs e )
{
ClosePopup( true );
}
protected virtual void Popup_Opened( object sender, EventArgs e )
{
}
#endregion //Event Handlers
#region Methods
protected void ClosePopup( bool isFocusOnTextBox )
{
if( IsOpen )
{
IsOpen = false;
}
ReleaseMouseCapture();
if( isFocusOnTextBox && ( TextBox != null ) )
TextBox.Focus();
}
#endregion //Methods
}
}
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