Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Documents / ColumnResizeAdorner.cs / 1305600 / ColumnResizeAdorner.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Adorner for column resize. // // History: // 08/19/2004 : ghermann - Created // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Windows.Documents; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Controls; using System.Windows.Controls.Primitives; using MS.Win32; using MS.Internal; namespace System.Windows.Documents.Internal { internal class ColumnResizeAdorner : Adorner { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors ////// C'tor for adorner /// /// /// FramwerokElement with TextView to which this element is attached /// as adorner. /// internal ColumnResizeAdorner(UIElement scope) : base(scope) { Debug.Assert(scope != null); // position _pen = new Pen(new SolidColorBrush(Colors.LightSlateGray), 2.0); _x = Double.NaN; _top = Double.NaN; _height = Double.NaN; } #endregion Constructors //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- #region Public Methods ////// Add a transform so that the adorner is in right spot. /// /// /// The transform applied to the object the adorner adorns /// ////// Transform to apply to the adorner /// public override GeneralTransform GetDesiredTransform(GeneralTransform transform) { GeneralTransformGroup group; TranslateTransform translation; group = new GeneralTransformGroup(); translation = new TranslateTransform(_x, _top); group.Children.Add(translation); if (transform != null) { group.Children.Add(transform); } return group; } #endregion Public Methods //------------------------------------------------------ // // Protected Methods // //------------------------------------------------------ #region Protected Methods protected override void OnRender(DrawingContext drawingContext) { // Render as a 2 pixel wide rect, one pixel in each bordering char bounding box. drawingContext.DrawLine(_pen, new Point(0, 0), new Point(0, _height)); } #endregion Protected Events //----------------------------------------------------- // // Internal Methods // //------------------------------------------------------ #region Internal Methods ////// Updates position for adorner. /// /// /// internal void Update(double newX) { if(_x != newX) { _x = newX; AdornerLayer adornerLayer; adornerLayer = VisualTreeHelper.GetParent(this) as AdornerLayer; if (adornerLayer != null) { // It may be null when TextBox is detached from a tree adornerLayer.Update(AdornedElement); adornerLayer.InvalidateVisual(); } } } internal void Initialize(UIElement renderScope, double xPos, double yPos, double height) { Debug.Assert(_adornerLayer == null, "Attempt to overwrite existing AdornerLayer!"); _adornerLayer = AdornerLayer.GetAdornerLayer(renderScope); if (_adornerLayer != null) { _adornerLayer.Add(this); } _x = xPos; _top = yPos; _height = height; } internal void Uninitialize() { if (_adornerLayer != null) { _adornerLayer.Remove(this); _adornerLayer = null; } } #endregion Internal methods //----------------------------------------------------- // // Private Methods // //----------------------------------------------------- #region Private Methods #endregion Private methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields // x position private double _x; // top position private double _top; // height private double _height; private Pen _pen; // Cached adornerlayer private AdornerLayer _adornerLayer; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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