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/*************************************************************************************
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Extended WPF Toolkit
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Copyright (C) 2007-2013 Xceed Software Inc.
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This program is provided to you under the terms of the Microsoft Public
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License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
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For more features, controls, and fast professional support,
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pick up the Plus Edition at http://xceed.com/wpf_toolkit
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Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
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***********************************************************************************/
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using System;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Input;
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using System.Windows.Threading;
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using Xceed.Wpf.Toolkit.Core.Utilities;
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namespace Xceed.Wpf.Toolkit
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{
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[TemplatePart( Name = PART_ResizeThumb, Type = typeof( Thumb ) )]
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[TemplatePart( Name = PART_TextBox, Type = typeof( TextBox ) )]
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[TemplatePart( Name = PART_DropDownButton, Type = typeof( ToggleButton ) )]
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public class MultiLineTextEditor : ContentControl
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{
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private const string PART_ResizeThumb = "PART_ResizeThumb";
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private const string PART_TextBox = "PART_TextBox";
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private const string PART_DropDownButton = "PART_DropDownButton";
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#region Members
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private Thumb _resizeThumb;
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private TextBox _textBox;
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private ToggleButton _toggleButton;
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#endregion //Members
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#region Properties
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#region DropDownHeight
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public static readonly DependencyProperty DropDownHeightProperty = DependencyProperty.Register( "DropDownHeight", typeof( double ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( 150.0 ) );
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public double DropDownHeight
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{
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get
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{
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return ( double )GetValue( DropDownHeightProperty );
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}
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set
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{
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SetValue( DropDownHeightProperty, value );
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}
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}
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#endregion DropDownHeight
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#region DropDownWidth
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public static readonly DependencyProperty DropDownWidthProperty = DependencyProperty.Register( "DropDownWidth", typeof( double ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( 200.0 ) );
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public double DropDownWidth
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{
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get
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{
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return ( double )GetValue( DropDownWidthProperty );
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}
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set
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{
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SetValue( DropDownWidthProperty, value );
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}
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}
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#endregion DropDownWidth
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#region IsOpen
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public static readonly DependencyProperty IsOpenProperty = DependencyProperty.Register( "IsOpen", typeof( bool ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( false, OnIsOpenChanged ) );
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public bool IsOpen
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{
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get
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{
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return ( bool )GetValue( IsOpenProperty );
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}
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set
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{
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SetValue( IsOpenProperty, value );
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}
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}
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private static void OnIsOpenChanged( DependencyObject o, DependencyPropertyChangedEventArgs e )
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{
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MultiLineTextEditor multiLineTextEditor = o as MultiLineTextEditor;
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if( multiLineTextEditor != null )
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multiLineTextEditor.OnIsOpenChanged( ( bool )e.OldValue, ( bool )e.NewValue );
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}
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protected virtual void OnIsOpenChanged( bool oldValue, bool newValue )
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{
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// Focus the content of the popup, after its loaded
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Dispatcher.BeginInvoke(new Action(()=>_textBox.Focus()), DispatcherPriority.Background);
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}
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#endregion //IsOpen
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#region IsSpellCheckEnabled
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public static readonly DependencyProperty IsSpellCheckEnabledProperty = DependencyProperty.Register( "IsSpellCheckEnabled", typeof( bool ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( false ) );
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public bool IsSpellCheckEnabled
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{
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get
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{
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return ( bool )GetValue( IsSpellCheckEnabledProperty );
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}
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set
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{
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SetValue( IsSpellCheckEnabledProperty, value );
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}
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}
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#endregion IsSpellCheckEnabled
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#region IsReadOnly
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public static readonly DependencyProperty IsReadOnlyProperty = DependencyProperty.Register( "IsReadOnly", typeof( bool ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( false ) );
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public bool IsReadOnly
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{
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get
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{
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return ( bool )GetValue( IsReadOnlyProperty );
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}
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set
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{
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SetValue( IsReadOnlyProperty, value );
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}
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}
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#endregion IsReadOnly
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#region Text
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public static readonly DependencyProperty TextProperty = DependencyProperty.Register( "Text", typeof( string ), typeof( MultiLineTextEditor ), new FrameworkPropertyMetadata( String.Empty, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnTextChanged ) );
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public string Text
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{
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get
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{
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return ( string )GetValue( TextProperty );
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}
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set
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{
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SetValue( TextProperty, value );
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}
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}
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private static void OnTextChanged( DependencyObject o, DependencyPropertyChangedEventArgs e )
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{
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MultiLineTextEditor textEditor = o as MultiLineTextEditor;
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if( textEditor != null )
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textEditor.OnTextChanged( ( string )e.OldValue, ( string )e.NewValue );
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}
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protected virtual void OnTextChanged( string oldValue, string newValue )
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{
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}
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#endregion //Text
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#region TextAlignment
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public static readonly DependencyProperty TextAlignmentProperty = DependencyProperty.Register( "TextAlignment", typeof( TextAlignment ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( TextAlignment.Left ) );
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public TextAlignment TextAlignment
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{
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get
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{
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return ( TextAlignment )GetValue( TextAlignmentProperty );
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}
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set
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{
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SetValue( TextAlignmentProperty, value );
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}
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}
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#endregion TextAlignment
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#region TextWrapping
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public static readonly DependencyProperty TextWrappingProperty = DependencyProperty.Register( "TextWrapping", typeof( TextWrapping ), typeof( MultiLineTextEditor ), new UIPropertyMetadata( TextWrapping.NoWrap ) );
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public TextWrapping TextWrapping
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{
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get
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{
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return ( TextWrapping )GetValue( TextWrappingProperty );
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}
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set
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{
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SetValue( TextWrappingProperty, value );
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}
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}
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#endregion TextWrapping
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#endregion //Properties
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#region Constructors
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static MultiLineTextEditor()
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{
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DefaultStyleKeyProperty.OverrideMetadata( typeof( MultiLineTextEditor ), new FrameworkPropertyMetadata( typeof( MultiLineTextEditor ) ) );
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}
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public MultiLineTextEditor()
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{
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Keyboard.AddKeyDownHandler( this, OnKeyDown );
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Mouse.AddPreviewMouseDownOutsideCapturedElementHandler( this, OnMouseDownOutsideCapturedElement );
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}
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#endregion //Constructors
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#region Bass Class Overrides
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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if( _resizeThumb != null )
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_resizeThumb.DragDelta -= ResizeThumb_DragDelta;
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_resizeThumb = GetTemplateChild( PART_ResizeThumb ) as Thumb;
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if( _resizeThumb != null )
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_resizeThumb.DragDelta += ResizeThumb_DragDelta;
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_textBox = GetTemplateChild( PART_TextBox ) as TextBox;
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_toggleButton = GetTemplateChild( PART_DropDownButton ) as ToggleButton;
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}
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#endregion //Bass Class Overrides
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#region Event Handlers
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private void OnKeyDown( object sender, KeyEventArgs e )
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{
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if( !IsOpen )
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{
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if( KeyboardUtilities.IsKeyModifyingPopupState( e ) )
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{
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IsOpen = true;
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e.Handled = true;
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}
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}
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else
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{
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if( KeyboardUtilities.IsKeyModifyingPopupState( e )
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|| ( e.Key == Key.Escape )
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|| ( e.Key == Key.Tab ) )
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{
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CloseEditor();
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e.Handled = true;
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}
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}
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}
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private void OnMouseDownOutsideCapturedElement( object sender, MouseButtonEventArgs e )
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{
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CloseEditor();
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}
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void ResizeThumb_DragDelta( object sender, DragDeltaEventArgs e )
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{
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double yadjust = DropDownHeight + e.VerticalChange;
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double xadjust = DropDownWidth + e.HorizontalChange;
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if( ( xadjust >= 0 ) && ( yadjust >= 0 ) )
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{
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DropDownWidth = xadjust;
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DropDownHeight = yadjust;
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}
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}
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#endregion //Event Handlers
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#region Methods
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private void CloseEditor()
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{
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if( IsOpen )
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IsOpen = false;
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ReleaseMouseCapture();
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_toggleButton.Focus();
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}
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#endregion //Methods
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}
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}
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