Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ToolStripScrollButton.cs / 1305376 / ToolStripScrollButton.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.ComponentModel; using System.Drawing; using System.Drawing.Design; using System.Diagnostics; using System.Windows.Forms.ButtonInternal; using System.Security.Permissions; using System.Security; ////// /// A non selectable winbar item /// internal class ToolStripScrollButton : ToolStripControlHost { private bool up = true; [ThreadStatic] private static Bitmap upScrollImage; [ThreadStatic] private static Bitmap downScrollImage; const int AUTOSCROLL_UPDATE = 50; private static readonly int AUTOSCROLL_PAUSE = SystemInformation.DoubleClickTime; private Timer mouseDownTimer; public ToolStripScrollButton(bool up) : base(CreateControlInstance(up)) { this.up = up; } private static Control CreateControlInstance(bool up) { StickyLabel label = new StickyLabel(); label.ImageAlign = ContentAlignment.MiddleCenter; label.Image = (up) ? UpImage : DownImage; return label; } ////// Deriving classes can override this to configure a default size for their control. /// This is more efficient than setting the size in the control's constructor. /// protected internal override Padding DefaultMargin { get { return Padding.Empty; } } protected override Padding DefaultPadding { get { return Padding.Empty; } } private static Image DownImage { get { if (downScrollImage == null) { downScrollImage = new Bitmap(typeof(ToolStripScrollButton), "ScrollButtonDown.bmp"); downScrollImage.MakeTransparent(Color.White); } return downScrollImage; } } internal StickyLabel Label { get{ return Control as StickyLabel; } } private static Image UpImage { get { if (upScrollImage == null) { upScrollImage = new Bitmap(typeof(ToolStripScrollButton), "ScrollButtonUp.bmp"); upScrollImage.MakeTransparent(Color.White); } return upScrollImage; } } private Timer MouseDownTimer { get{ if (mouseDownTimer == null) { mouseDownTimer = new Timer(); } return mouseDownTimer; } } protected override void Dispose(bool disposing) { if (disposing) { if (mouseDownTimer != null) { mouseDownTimer.Enabled = false; mouseDownTimer.Dispose(); mouseDownTimer = null; } } base.Dispose(disposing); } protected override void OnMouseDown (MouseEventArgs e) { UnsubscribeAll(); base.OnMouseDown(e); Scroll(); MouseDownTimer.Interval = AUTOSCROLL_PAUSE; MouseDownTimer.Tick += new EventHandler(OnInitialAutoScrollMouseDown); MouseDownTimer.Enabled = true; } protected override void OnMouseUp (MouseEventArgs e) { UnsubscribeAll(); base.OnMouseUp(e); } protected override void OnMouseLeave (EventArgs e) { UnsubscribeAll(); } private void UnsubscribeAll() { MouseDownTimer.Enabled = false; MouseDownTimer.Tick -= new EventHandler(OnInitialAutoScrollMouseDown); MouseDownTimer.Tick -= new EventHandler(OnAutoScrollAccellerate); } private void OnAutoScrollAccellerate(object sender, EventArgs e) { Scroll(); } private void OnInitialAutoScrollMouseDown(object sender, EventArgs e) { MouseDownTimer.Tick -= new EventHandler(OnInitialAutoScrollMouseDown); Scroll(); MouseDownTimer.Interval = AUTOSCROLL_UPDATE; MouseDownTimer.Tick += new EventHandler(OnAutoScrollAccellerate); } public override Size GetPreferredSize(Size constrainingSize) { Size preferredSize = Size.Empty; preferredSize.Height = (Label.Image != null) ? Label.Image.Height + 4 : 0; preferredSize.Width = (ParentInternal != null) ? ParentInternal.Width - 2 : preferredSize.Width; // Two for border return preferredSize; } private void Scroll() { ToolStripDropDownMenu parent = this.ParentInternal as ToolStripDropDownMenu; if (parent != null && Label.Enabled) { parent.ScrollInternal(up); } } internal class StickyLabel : Label { public StickyLabel() { } private bool freezeLocationChange = false; public bool FreezeLocationChange { get { return freezeLocationChange; } } protected override void SetBoundsCore(int x,int y,int width, int height, BoundsSpecified specified) { if (((specified & BoundsSpecified.Location) != 0) && FreezeLocationChange) { return; } base.SetBoundsCore(x, y, width, height, specified); } [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.UnmanagedCode)] protected override void WndProc(ref Message m) { if (m.Msg >= NativeMethods.WM_KEYFIRST && m.Msg <= NativeMethods.WM_KEYLAST) { // SECREVIEW: // NOTE this is the same as ToolStripDropDown, except we NEVER want to raise the key events. DefWndProc(ref m); return; } base.WndProc(ref m); } } } } // 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
- ChineseLunisolarCalendar.cs
- ContentFilePart.cs
- EntryIndex.cs
- GeometryValueSerializer.cs
- TypeLoadException.cs
- XmlFormatWriterGenerator.cs
- ContractNamespaceAttribute.cs
- QilInvokeEarlyBound.cs
- AssemblyCollection.cs
- BindingCompleteEventArgs.cs
- TabControlDesigner.cs
- ThicknessAnimationBase.cs
- Version.cs
- DataTemplateSelector.cs
- NetworkCredential.cs
- ServiceModelReg.cs
- SortedList.cs
- Random.cs
- MSAAEventDispatcher.cs
- FormViewPagerRow.cs
- PassportAuthentication.cs
- RelatedImageListAttribute.cs
- SegmentInfo.cs
- SqlSelectClauseBuilder.cs
- FunctionImportElement.cs
- ScriptRegistrationManager.cs
- ClientApiGenerator.cs
- EnumerableRowCollection.cs
- WpfWebRequestHelper.cs
- DatagridviewDisplayedBandsData.cs
- SemanticValue.cs
- DeferredTextReference.cs
- WebPartConnectionsConnectVerb.cs
- TickBar.cs
- DataServiceRequestOfT.cs
- AndMessageFilterTable.cs
- DropAnimation.xaml.cs
- DeviceSpecific.cs
- ResourcePool.cs
- TextViewBase.cs
- RegionInfo.cs
- ObjectContext.cs
- Latin1Encoding.cs
- DbDataRecord.cs
- PageThemeParser.cs
- TransformDescriptor.cs
- GifBitmapEncoder.cs
- NonClientArea.cs
- StorageModelBuildProvider.cs
- NameValuePermission.cs
- EventRoute.cs
- Vector3D.cs
- ListViewDataItem.cs
- ComplexTypeEmitter.cs
- CodeCastExpression.cs
- DefaultCompensation.cs
- SafeLibraryHandle.cs
- EntityClassGenerator.cs
- RSAPKCS1KeyExchangeFormatter.cs
- IInstanceTable.cs
- XpsSerializationManager.cs
- SmiMetaData.cs
- AsymmetricAlgorithm.cs
- SchemaElementDecl.cs
- TypeElement.cs
- MenuItemBindingCollection.cs
- XamlReader.cs
- OperationInvokerBehavior.cs
- PropertyMapper.cs
- CompilerInfo.cs
- TreeNodeCollection.cs
- ImageInfo.cs
- ParentUndoUnit.cs
- ConnectionOrientedTransportElement.cs
- EntityClassGenerator.cs
- GlyphCache.cs
- WindowsPen.cs
- HttpCapabilitiesSectionHandler.cs
- MergePropertyDescriptor.cs
- XPathNavigatorReader.cs
- CacheMemory.cs
- StringAttributeCollection.cs
- ReplacementText.cs
- RemotingException.cs
- WaitHandleCannotBeOpenedException.cs
- ArgumentNullException.cs
- SecurityAccessDeniedException.cs
- ArrayElementGridEntry.cs
- ScalarType.cs
- WebResourceUtil.cs
- ThreadStartException.cs
- ExpressionBinding.cs
- SoapReflectionImporter.cs
- RangeValidator.cs
- SafeRegistryHandle.cs
- Bezier.cs
- SqlConnectionPoolProviderInfo.cs
- ObjectToModelValueConverter.cs
- StickyNoteContentControl.cs
- PropertyEmitterBase.cs