Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / ScrollableControlDesigner.cs / 1 / ScrollableControlDesigner.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms.Design { using System.Design; using System.Runtime.Serialization.Formatters; using System.ComponentModel; using System.Diagnostics; using System; using System.ComponentModel.Design; using System.Windows.Forms; using System.Windows.Forms.Design.Behavior; using System.Drawing; using Microsoft.Win32; ////// /// The ScrollableControlDesigner class builds on the ParentControlDesigner, and adds the implementation /// of IWinFormsDesigner so that the designer can be hosted as a document. /// public class ScrollableControlDesigner : ParentControlDesigner { private SelectionManager selManager; ////// /// Overrides the base class's GetHitTest method to determine regions of the /// control that should always be UI-Active. For a form, if it has autoscroll /// set the scroll bars are always UI active. /// protected override bool GetHitTest(Point pt) { if (base.GetHitTest(pt)) { return true; } // The scroll bars on a form are "live" // ScrollableControl f = (ScrollableControl)Control; if (f.IsHandleCreated && f.AutoScroll) { int hitTest = (int)NativeMethods.SendMessage(f.Handle, NativeMethods.WM_NCHITTEST, (IntPtr)0, (IntPtr)NativeMethods.Util.MAKELPARAM(pt.X, pt.Y)); if (hitTest == NativeMethods.HTVSCROLL || hitTest == NativeMethods.HTHSCROLL) { return true; } } return false; } ////// /// We override our base class's WndProc to monitor certain messages. /// protected override void WndProc(ref Message m) { base.WndProc(ref m); switch(m.Msg) { case NativeMethods.WM_HSCROLL: case NativeMethods.WM_VSCROLL: // When we scroll, we reposition a control without causing a // property change event. Therefore, we must tell the // SelectionManager to refresh its glyphs. if (selManager == null) { selManager = GetService(typeof(SelectionManager)) as SelectionManager; } if (selManager != null) { selManager.Refresh(); } // Now we must paint our adornments, since the scroll does not // trigger a paint event // Control.Invalidate(); Control.Update(); break; } } } } // 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
- precedingquery.cs
- DefaultValueAttribute.cs
- BitmapSource.cs
- InternalBase.cs
- EdmItemCollection.cs
- MenuItemStyle.cs
- SolidBrush.cs
- ArraySortHelper.cs
- MultipartIdentifier.cs
- ButtonBase.cs
- HealthMonitoringSectionHelper.cs
- XPathSelectionIterator.cs
- QilPatternFactory.cs
- PopupEventArgs.cs
- XmlObjectSerializerContext.cs
- TextElement.cs
- UserCancellationException.cs
- ScriptComponentDescriptor.cs
- Geometry3D.cs
- OdbcCommandBuilder.cs
- ResourceProviderFactory.cs
- DbCommandTree.cs
- WebScriptMetadataMessageEncoderFactory.cs
- OdbcDataReader.cs
- XMLUtil.cs
- DeviceFiltersSection.cs
- PropertyMetadata.cs
- SafeRightsManagementHandle.cs
- SpAudioStreamWrapper.cs
- Menu.cs
- ArrayWithOffset.cs
- CodeArgumentReferenceExpression.cs
- SerializationAttributes.cs
- ErrorItem.cs
- BaseValidator.cs
- FindProgressChangedEventArgs.cs
- RenderContext.cs
- LogManagementAsyncResult.cs
- PixelFormats.cs
- ResourceProviderFactory.cs
- SqlHelper.cs
- HealthMonitoringSection.cs
- ConnectionPointCookie.cs
- SecurityCriticalDataForSet.cs
- PriorityQueue.cs
- processwaithandle.cs
- InvalidDataException.cs
- SafeRightsManagementHandle.cs
- ProfileSection.cs
- PermissionRequestEvidence.cs
- GCHandleCookieTable.cs
- LongCountAggregationOperator.cs
- CodeSubDirectoriesCollection.cs
- EmptyEnumerator.cs
- DoubleAnimationUsingPath.cs
- GridViewUpdatedEventArgs.cs
- AddingNewEventArgs.cs
- ComponentCollection.cs
- EditorBrowsableAttribute.cs
- Renderer.cs
- BoundField.cs
- XmlRootAttribute.cs
- Compiler.cs
- NotifyIcon.cs
- QueryReaderSettings.cs
- ListItemCollection.cs
- LineBreak.cs
- PrintingPermission.cs
- Token.cs
- BindingContext.cs
- PropertyPathConverter.cs
- NameHandler.cs
- QilSortKey.cs
- TemplateApplicationHelper.cs
- FixedSOMGroup.cs
- ProvidePropertyAttribute.cs
- XmlCharacterData.cs
- NameValueCollection.cs
- mediaclock.cs
- GridViewRowEventArgs.cs
- FixedSOMLineCollection.cs
- Substitution.cs
- DocumentPaginator.cs
- AssemblyResourceLoader.cs
- AppModelKnownContentFactory.cs
- ResXResourceWriter.cs
- SmtpNtlmAuthenticationModule.cs
- IChannel.cs
- TemplatePartAttribute.cs
- ClientConfigurationSystem.cs
- SortExpressionBuilder.cs
- TextTreeDeleteContentUndoUnit.cs
- TrackingMemoryStream.cs
- SoapIncludeAttribute.cs
- Codec.cs
- ScaleTransform3D.cs
- CodeGotoStatement.cs
- AdRotatorDesigner.cs
- SafeUserTokenHandle.cs
- DrawListViewSubItemEventArgs.cs