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
- TypeDependencyAttribute.cs
- AuditLevel.cs
- Transform.cs
- TraceHelpers.cs
- EventData.cs
- Delay.cs
- HierarchicalDataBoundControl.cs
- MsmqSecureHashAlgorithm.cs
- SiteOfOriginPart.cs
- SecurityPolicySection.cs
- Vector3D.cs
- URIFormatException.cs
- FileDialog_Vista.cs
- FormDesigner.cs
- NamedElement.cs
- ListManagerBindingsCollection.cs
- ListViewDeleteEventArgs.cs
- NativeMethodsCLR.cs
- DrawItemEvent.cs
- DataGridTableCollection.cs
- PointAnimationClockResource.cs
- BridgeDataRecord.cs
- ClipboardProcessor.cs
- NativeMethodsOther.cs
- UnsafeNativeMethodsMilCoreApi.cs
- WebInvokeAttribute.cs
- Nullable.cs
- UnknownBitmapDecoder.cs
- NamedElement.cs
- QueryReaderSettings.cs
- CapabilitiesAssignment.cs
- precedingquery.cs
- BamlRecords.cs
- CodeIdentifiers.cs
- DictionaryBase.cs
- XmlnsDictionary.cs
- MessageQueueConverter.cs
- PagePropertiesChangingEventArgs.cs
- ComponentCache.cs
- TextInfo.cs
- ServicePointManagerElement.cs
- EntityTemplateUserControl.cs
- HostedNamedPipeTransportManager.cs
- CopyCodeAction.cs
- EncodedStreamFactory.cs
- XmlBoundElement.cs
- Suspend.cs
- TdsParserSafeHandles.cs
- Quad.cs
- BitmapCacheBrush.cs
- BrowserCapabilitiesFactoryBase.cs
- DBAsyncResult.cs
- DictionaryContent.cs
- Model3D.cs
- OdbcParameter.cs
- CDSCollectionETWBCLProvider.cs
- CommandBinding.cs
- COM2PropertyDescriptor.cs
- ToolStripPanelSelectionGlyph.cs
- RegexCapture.cs
- ProxyElement.cs
- XDRSchema.cs
- HtmlTable.cs
- BrowserDefinition.cs
- DataFormat.cs
- AttributeUsageAttribute.cs
- FieldInfo.cs
- HtmlInputRadioButton.cs
- ProgressBar.cs
- VisualCollection.cs
- FixedDSBuilder.cs
- DocobjHost.cs
- GroupBoxDesigner.cs
- TextLineResult.cs
- SineEase.cs
- HelloOperationCD1AsyncResult.cs
- DesignerForm.cs
- WindowsStartMenu.cs
- SQLDouble.cs
- DataServiceClientException.cs
- PropertyTab.cs
- CrossContextChannel.cs
- AgileSafeNativeMemoryHandle.cs
- CommunicationException.cs
- WorkingDirectoryEditor.cs
- TargetInvocationException.cs
- AsyncPostBackTrigger.cs
- PageTheme.cs
- ProgressBarRenderer.cs
- CaseStatement.cs
- TreeNodeCollection.cs
- QilInvokeLateBound.cs
- BevelBitmapEffect.cs
- CheckBoxField.cs
- AncillaryOps.cs
- OLEDB_Util.cs
- DataGridViewTopLeftHeaderCell.cs
- DragStartedEventArgs.cs
- SqlBooleanMismatchVisitor.cs
- TextRunCache.cs