Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / ToolStripScrollButton.cs / 1 / 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
- IndexedGlyphRun.cs
- Activator.cs
- CallbackBehaviorAttribute.cs
- IDispatchConstantAttribute.cs
- UriSchemeKeyedCollection.cs
- unitconverter.cs
- ObjectFactoryCodeDomTreeGenerator.cs
- UIElement3D.cs
- PauseStoryboard.cs
- ObjectStorage.cs
- CommandHelpers.cs
- XmlLanguage.cs
- ValidationHelpers.cs
- ProtocolsConfigurationHandler.cs
- RSAPKCS1SignatureFormatter.cs
- ThreadExceptionDialog.cs
- AttributeAction.cs
- CssClassPropertyAttribute.cs
- VersionPair.cs
- ConfigXmlSignificantWhitespace.cs
- DocumentXmlWriter.cs
- SchemaContext.cs
- _SSPIWrapper.cs
- CalendarDateRange.cs
- InputBindingCollection.cs
- XsltCompileContext.cs
- RadioButtonStandardAdapter.cs
- CharKeyFrameCollection.cs
- TimeoutException.cs
- PersonalizationStateInfoCollection.cs
- Triplet.cs
- LocalizationParserHooks.cs
- Subtree.cs
- AttachedPropertyBrowsableAttribute.cs
- OperationGenerator.cs
- PageAsyncTaskManager.cs
- HttpCacheVaryByContentEncodings.cs
- ObjectCacheSettings.cs
- ConfigXmlReader.cs
- BoundsDrawingContextWalker.cs
- CriticalHandle.cs
- AsynchronousChannel.cs
- NotifyIcon.cs
- SqlUdtInfo.cs
- QilGeneratorEnv.cs
- Quaternion.cs
- ToolStripLocationCancelEventArgs.cs
- TcpChannelHelper.cs
- TableRowCollection.cs
- AssociatedControlConverter.cs
- PageStatePersister.cs
- EventItfInfo.cs
- MediaEntryAttribute.cs
- WebPartConnectVerb.cs
- TcpClientCredentialType.cs
- ToolStripSplitStackLayout.cs
- DataKey.cs
- ErrorWebPart.cs
- nulltextcontainer.cs
- ListBoxDesigner.cs
- X509Certificate.cs
- DataRowComparer.cs
- DataListGeneralPage.cs
- HttpCacheVary.cs
- FixedSOMFixedBlock.cs
- TextReader.cs
- UserPersonalizationStateInfo.cs
- DateTimeOffsetStorage.cs
- SmtpException.cs
- TargetFrameworkAttribute.cs
- ExpressionPrinter.cs
- BufferedGraphicsManager.cs
- InstanceHandleReference.cs
- PartitionResolver.cs
- CodeTypeMemberCollection.cs
- HitTestDrawingContextWalker.cs
- ShaderEffect.cs
- FieldBuilder.cs
- ConfigurationConverterBase.cs
- RichTextBoxContextMenu.cs
- XmlSignificantWhitespace.cs
- TextSelectionProcessor.cs
- MenuItemStyleCollection.cs
- Quaternion.cs
- ColumnHeader.cs
- WebServiceErrorEvent.cs
- FunctionDescription.cs
- Figure.cs
- XsdDuration.cs
- ProtocolViolationException.cs
- TransformerConfigurationWizardBase.cs
- CqlGenerator.cs
- Page.cs
- WizardPanel.cs
- LayoutTableCell.cs
- ClosableStream.cs
- CompiledRegexRunner.cs
- XomlDesignerLoader.cs
- SqlEnums.cs
- PerformanceCounterNameAttribute.cs