Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / AccessibleTech / longhorn / Automation / Win32Providers / MS / Internal / AutomationProxies / WindowsProgressbar.cs / 1 / WindowsProgressbar.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: HWND-based ProgressBar Proxy // // History: // [....]. Created // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Text; using System.ComponentModel; using System.Windows.Automation; using System.Windows.Automation.Provider; using System.Windows; using MS.Win32; namespace MS.Internal.AutomationProxies { class WindowsProgressBar: ProxyHwnd, IRangeValueProvider { // ----------------------------------------------------- // // Constructors // // ----------------------------------------------------- #region Constructors WindowsProgressBar (IntPtr hwnd, ProxyFragment parent, int item) : base( hwnd, parent, item ) { _cControlType = ControlType.ProgressBar; // support for events _createOnEvent = new WinEventTracker.ProxyRaiseEvents (RaiseEvents); } #endregion #region Proxy Create // Static Create method called by UIAutomation to create this proxy. // returns null if unsuccessful internal static IRawElementProviderSimple Create(IntPtr hwnd, int idChild, int idObject) { return Create(hwnd, idChild); } private static IRawElementProviderSimple Create(IntPtr hwnd, int idChild) { // Something is wrong if idChild is not zero if (idChild != 0) { System.Diagnostics.Debug.Assert (idChild == 0, "Invalid Child Id, idChild != 0"); throw new ArgumentOutOfRangeException("idChild", idChild, SR.Get(SRID.ShouldBeZero)); } return new WindowsProgressBar(hwnd, null, 0); } // Static Create method called by the event tracker system // WinEvents are raise because items exist. So it makes sense to create the item and // check for details afterward. internal static void RaiseEvents (IntPtr hwnd, int eventId, object idProp, int idObject, int idChild) { if (idObject != NativeMethods.OBJID_VSCROLL && idObject != NativeMethods.OBJID_HSCROLL) { WindowsProgressBar wtv = new WindowsProgressBar (hwnd, null, 0); wtv.DispatchEvents (eventId, idProp, idObject, idChild); } } #endregion //------------------------------------------------------ // // Patterns Implementation // //----------------------------------------------------- #region ProxySimple Interface // Returns a pattern interface if supported. internal override object GetPatternProvider (AutomationPattern iid) { return (iid == RangeValuePattern.Pattern) ? this : null; } #endregion #region RangeValue Pattern void IRangeValueProvider.SetValue (double val) { //This proxy is readonly throw new InvalidOperationException(SR.Get(SRID.ValueReadonly)); } // Request to get the value that this UI element is representing in a native format double IRangeValueProvider.Value { get { return (double)ValuePercent; } } bool IRangeValueProvider.IsReadOnly { get { return true; } } double IRangeValueProvider.Maximum { get { return (double) 100; } } double IRangeValueProvider.Minimum { get { return (double) 0; } } double IRangeValueProvider.SmallChange { get { return Double.NaN; } } double IRangeValueProvider.LargeChange { get { return Double.NaN; } } #endregion //------------------------------------------------------ // // Private Methods // //------------------------------------------------------ #region Private Methods #region Value pattern helper private int ValuePercent { get { int cur = Misc.ProxySendMessageInt(_hwnd, NativeMethods.PBM_GETPOS, IntPtr.Zero, IntPtr.Zero); int min = Misc.ProxySendMessageInt(_hwnd, NativeMethods.PBM_GETRANGE, new IntPtr(1), IntPtr.Zero); int max = Misc.ProxySendMessageInt(_hwnd, NativeMethods.PBM_GETRANGE, IntPtr.Zero, IntPtr.Zero); int actualCur = cur - min; int range = max - min; return ((range != 0) ? (int)((100 * actualCur + range / 2) / range) : 0); } } #endregion #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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