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
- BufferBuilder.cs
- BindingMemberInfo.cs
- Pen.cs
- HwndHost.cs
- RowsCopiedEventArgs.cs
- UIHelper.cs
- DataGridViewComboBoxColumn.cs
- NullableIntSumAggregationOperator.cs
- UserNameSecurityToken.cs
- ContainerAction.cs
- ActiveXMessageFormatter.cs
- X509Certificate.cs
- MessageQueueInstaller.cs
- AsymmetricSignatureFormatter.cs
- EventWaitHandle.cs
- DataObject.cs
- DbConnectionPoolIdentity.cs
- AdRotator.cs
- DataQuery.cs
- IntranetCredentialPolicy.cs
- EntityParameter.cs
- CopyNamespacesAction.cs
- FixedDocumentSequencePaginator.cs
- WebPartTransformerCollection.cs
- WinEventTracker.cs
- TreeView.cs
- RestHandler.cs
- Currency.cs
- activationcontext.cs
- DataGridViewButtonCell.cs
- PropertyNames.cs
- SmtpFailedRecipientsException.cs
- InsufficientExecutionStackException.cs
- PermissionRequestEvidence.cs
- IndicShape.cs
- Font.cs
- ScrollEventArgs.cs
- TransactionFlowProperty.cs
- GifBitmapDecoder.cs
- ImageConverter.cs
- DrawingContextDrawingContextWalker.cs
- GridEntryCollection.cs
- ContentFileHelper.cs
- TypeInitializationException.cs
- ProtocolsConfigurationEntry.cs
- PinnedBufferMemoryStream.cs
- FileVersion.cs
- Quad.cs
- Parameter.cs
- storagemappingitemcollection.viewdictionary.cs
- EmptyControlCollection.cs
- Literal.cs
- NameValuePermission.cs
- Site.cs
- TextRangeSerialization.cs
- FrameworkContentElementAutomationPeer.cs
- Enum.cs
- TextLineBreak.cs
- Triplet.cs
- SQLChars.cs
- BooleanSwitch.cs
- SystemIPInterfaceProperties.cs
- StorageComplexTypeMapping.cs
- Error.cs
- AsymmetricSecurityBindingElement.cs
- SqlTriggerContext.cs
- CalendarSelectionChangedEventArgs.cs
- XmlRawWriter.cs
- mediapermission.cs
- WebPartConnectionsConfigureVerb.cs
- NavigateEvent.cs
- CodeMemberProperty.cs
- GeneralTransform3DCollection.cs
- Soap.cs
- InternalResources.cs
- MailFileEditor.cs
- ToolStripContentPanelDesigner.cs
- FolderBrowserDialog.cs
- DataErrorValidationRule.cs
- COM2TypeInfoProcessor.cs
- XamlClipboardData.cs
- BuildManagerHost.cs
- ContentElementCollection.cs
- GlyphTypeface.cs
- UnauthorizedAccessException.cs
- FontStyle.cs
- ListViewPagedDataSource.cs
- GeometryModel3D.cs
- DefaultBindingPropertyAttribute.cs
- DataSourceXmlSerializer.cs
- ProgressBarHighlightConverter.cs
- FrameSecurityDescriptor.cs
- HttpContext.cs
- DataKeyCollection.cs
- ListViewUpdateEventArgs.cs
- CompModSwitches.cs
- InvalidateEvent.cs
- BatchParser.cs
- WindowsTreeView.cs
- FamilyMap.cs