Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / InterOp / HwndPanningFeedback.cs / 1305600 / HwndPanningFeedback.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security; using System.Windows.Interop; using System.Windows.Media; using System.Windows.Threading; using MS.Win32; namespace System.Windows.Interop { ////// Helper class to provide window feedback that panning has hit an edge. /// internal class HwndPanningFeedback { ////// Instantiates a new instance of this class. /// /// The HWND on which to provide feedback. ////// SecurityCritical: Accesses HwndSource. /// TreatAsSafe: Information is not given out. /// [SecurityCritical, SecurityTreatAsSafe] public HwndPanningFeedback(HwndSource hwndSource) { if (hwndSource == null) { throw new ArgumentNullException("hwndSource"); } _hwndSource = hwndSource; } private static bool IsSupported { get { return OperatingSystemVersionCheck.IsVersionOrLater(OperatingSystemVersion.Windows7); } } ////// Returns the handle of the current window. /// ////// SecurityCritical: Handles _hwndSource /// SecurityCritical: Handles and exposes HwndSource.Handle /// private HandleRef Handle { [SecurityCritical] get { if (_hwndSource != null) { IntPtr handle = _hwndSource.CriticalHandle; if (handle != IntPtr.Zero) { return new HandleRef(_hwndSource, handle); } } return new HandleRef(); } } ////// Moves the window by the offset. /// Used to provide feedback that panning has hit an edge. /// /// The total offset relative to the original location. /// Whether the edge was hit due to inertia or the user panning. ////// SecurityCritical: Changes the on-screen position of a window. /// SecurityCritical: Accesses Handle. /// [SecurityCritical] public void UpdatePanningFeedback(Vector totalOverpanOffset, bool inInertia) { if ((_hwndSource != null) && IsSupported) { if (!_isProvidingPanningFeedback) { _isProvidingPanningFeedback = UnsafeNativeMethods.BeginPanningFeedback(Handle); } if (_isProvidingPanningFeedback) { var deviceOffset = _hwndSource.TransformToDevice((Point)totalOverpanOffset); _deviceOffsetX = (int)deviceOffset.X; _deviceOffsetY = (int)deviceOffset.Y; _inInertia = inInertia; if (_updatePanningOperation == null) { _updatePanningOperation = _hwndSource.Dispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(OnUpdatePanningFeedback), this); } } } } ////// SecurityCritical: Changes the on-screen position of a window. /// SecurityCritical: Accesses Handle. /// [SecurityCritical] private object OnUpdatePanningFeedback(object args) { HwndPanningFeedback panningFeedback = (HwndPanningFeedback)args; _updatePanningOperation = null; UnsafeNativeMethods.UpdatePanningFeedback(panningFeedback.Handle, panningFeedback._deviceOffsetX, panningFeedback._deviceOffsetY, panningFeedback._inInertia); return null; } private int _deviceOffsetX; private int _deviceOffsetY; private bool _inInertia; private DispatcherOperation _updatePanningOperation; ////// Moves the window back to its original position. /// Used to provide feedback that panning has hit an edge. /// /// Whether to animate or snap back to the original position ////// SecurityCritical: Changes the on-screen position of a window. /// SecurityCritical: Accesses _handle. /// TreatAsSafe: Returns the window to its original position, which is safe. /// [SecurityCritical, SecurityTreatAsSafe] public void EndPanningFeedback(bool animateBack) { if (_hwndSource != null && _isProvidingPanningFeedback) { _isProvidingPanningFeedback = false; if (_updatePanningOperation != null) { _updatePanningOperation.Abort(); _updatePanningOperation = null; } UnsafeNativeMethods.EndPanningFeedback(Handle, animateBack); } } ////// Whether panning feedback is currently in progress. /// private bool _isProvidingPanningFeedback; ////// The HwndSource being manipulated. /// ////// SecurityCritical: Access to the window. /// [SecurityCritical] private HwndSource _hwndSource; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security; using System.Windows.Interop; using System.Windows.Media; using System.Windows.Threading; using MS.Win32; namespace System.Windows.Interop { ////// Helper class to provide window feedback that panning has hit an edge. /// internal class HwndPanningFeedback { ////// Instantiates a new instance of this class. /// /// The HWND on which to provide feedback. ////// SecurityCritical: Accesses HwndSource. /// TreatAsSafe: Information is not given out. /// [SecurityCritical, SecurityTreatAsSafe] public HwndPanningFeedback(HwndSource hwndSource) { if (hwndSource == null) { throw new ArgumentNullException("hwndSource"); } _hwndSource = hwndSource; } private static bool IsSupported { get { return OperatingSystemVersionCheck.IsVersionOrLater(OperatingSystemVersion.Windows7); } } ////// Returns the handle of the current window. /// ////// SecurityCritical: Handles _hwndSource /// SecurityCritical: Handles and exposes HwndSource.Handle /// private HandleRef Handle { [SecurityCritical] get { if (_hwndSource != null) { IntPtr handle = _hwndSource.CriticalHandle; if (handle != IntPtr.Zero) { return new HandleRef(_hwndSource, handle); } } return new HandleRef(); } } ////// Moves the window by the offset. /// Used to provide feedback that panning has hit an edge. /// /// The total offset relative to the original location. /// Whether the edge was hit due to inertia or the user panning. ////// SecurityCritical: Changes the on-screen position of a window. /// SecurityCritical: Accesses Handle. /// [SecurityCritical] public void UpdatePanningFeedback(Vector totalOverpanOffset, bool inInertia) { if ((_hwndSource != null) && IsSupported) { if (!_isProvidingPanningFeedback) { _isProvidingPanningFeedback = UnsafeNativeMethods.BeginPanningFeedback(Handle); } if (_isProvidingPanningFeedback) { var deviceOffset = _hwndSource.TransformToDevice((Point)totalOverpanOffset); _deviceOffsetX = (int)deviceOffset.X; _deviceOffsetY = (int)deviceOffset.Y; _inInertia = inInertia; if (_updatePanningOperation == null) { _updatePanningOperation = _hwndSource.Dispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(OnUpdatePanningFeedback), this); } } } } ////// SecurityCritical: Changes the on-screen position of a window. /// SecurityCritical: Accesses Handle. /// [SecurityCritical] private object OnUpdatePanningFeedback(object args) { HwndPanningFeedback panningFeedback = (HwndPanningFeedback)args; _updatePanningOperation = null; UnsafeNativeMethods.UpdatePanningFeedback(panningFeedback.Handle, panningFeedback._deviceOffsetX, panningFeedback._deviceOffsetY, panningFeedback._inInertia); return null; } private int _deviceOffsetX; private int _deviceOffsetY; private bool _inInertia; private DispatcherOperation _updatePanningOperation; ////// Moves the window back to its original position. /// Used to provide feedback that panning has hit an edge. /// /// Whether to animate or snap back to the original position ////// SecurityCritical: Changes the on-screen position of a window. /// SecurityCritical: Accesses _handle. /// TreatAsSafe: Returns the window to its original position, which is safe. /// [SecurityCritical, SecurityTreatAsSafe] public void EndPanningFeedback(bool animateBack) { if (_hwndSource != null && _isProvidingPanningFeedback) { _isProvidingPanningFeedback = false; if (_updatePanningOperation != null) { _updatePanningOperation.Abort(); _updatePanningOperation = null; } UnsafeNativeMethods.EndPanningFeedback(Handle, animateBack); } } ////// Whether panning feedback is currently in progress. /// private bool _isProvidingPanningFeedback; ////// The HwndSource being manipulated. /// ////// SecurityCritical: Access to the window. /// [SecurityCritical] private HwndSource _hwndSource; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SystemIPInterfaceStatistics.cs
- OleDbCommand.cs
- SQLMembershipProvider.cs
- Root.cs
- QueryConverter.cs
- ReadOnlyCollection.cs
- CancellationHandler.cs
- ProfileGroupSettings.cs
- X509ClientCertificateAuthenticationElement.cs
- EditorPartCollection.cs
- DesignerTransactionCloseEvent.cs
- XMLUtil.cs
- Identity.cs
- Mapping.cs
- FileUtil.cs
- ZipFileInfoCollection.cs
- GradientSpreadMethodValidation.cs
- DataSourceCache.cs
- DbConnectionStringBuilder.cs
- AmbientLight.cs
- FilterQuery.cs
- Mappings.cs
- ChannelCacheDefaults.cs
- SystemShuttingDownException.cs
- SigningCredentials.cs
- QueryableDataSourceView.cs
- ThicknessAnimation.cs
- JobDuplex.cs
- ProfilePropertyNameValidator.cs
- DesignerActionPropertyItem.cs
- TemplateBamlRecordReader.cs
- PeerEndPoint.cs
- CodeValidator.cs
- StylusDevice.cs
- InkCanvasInnerCanvas.cs
- DynamicDocumentPaginator.cs
- StandardOleMarshalObject.cs
- FrameworkTextComposition.cs
- MetadataPropertyCollection.cs
- SettingsPropertyValue.cs
- SelectionEditor.cs
- SqlConnectionFactory.cs
- ProgressBarAutomationPeer.cs
- PolicyFactory.cs
- TypeToken.cs
- ScriptResourceInfo.cs
- DataServiceQueryException.cs
- HostProtectionPermission.cs
- WorkflowServiceHost.cs
- QueryGenerator.cs
- ActiveXSite.cs
- XmlUnspecifiedAttribute.cs
- WebPartZone.cs
- ProfileServiceManager.cs
- _ConnectionGroup.cs
- cache.cs
- ResourceReferenceKeyNotFoundException.cs
- WebPartChrome.cs
- HMACSHA384.cs
- DataSourceExpressionCollection.cs
- VisualStates.cs
- OperandQuery.cs
- OdbcErrorCollection.cs
- NgenServicingAttributes.cs
- XsltLoader.cs
- CrossAppDomainChannel.cs
- DataGridSortCommandEventArgs.cs
- TdsParserSafeHandles.cs
- TableLayoutColumnStyleCollection.cs
- OptimalTextSource.cs
- OleAutBinder.cs
- CancellationToken.cs
- MethodBody.cs
- CacheSection.cs
- login.cs
- RootBrowserWindow.cs
- PublishLicense.cs
- PersistenceProvider.cs
- PartBasedPackageProperties.cs
- _NestedMultipleAsyncResult.cs
- OnOperation.cs
- XmlMemberMapping.cs
- Attachment.cs
- StaticSiteMapProvider.cs
- HtmlGenericControl.cs
- XmlDataSourceView.cs
- SvcMapFileLoader.cs
- UnsafeNativeMethods.cs
- InputScopeManager.cs
- ReachDocumentReferenceSerializer.cs
- CreateRefExpr.cs
- Form.cs
- Speller.cs
- XsdBuildProvider.cs
- ResourceIDHelper.cs
- ModelTreeEnumerator.cs
- WindowsFormsHostPropertyMap.cs
- DataGridView.cs
- HebrewNumber.cs
- AxHostDesigner.cs