Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / DisplayInformation.cs / 1 / DisplayInformation.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using Microsoft.Win32; using System.Security; using System.Security.Permissions; internal class DisplayInformation { private static bool highContrast; //whether we are under hight contrast mode private static bool lowRes; //whether we are under low resolution mode private static bool isTerminalServerSession; //whether this application is run on a terminal server (remote desktop) private static bool highContrastSettingValid; //indicates whether the high contrast setting is correct private static bool lowResSettingValid; //indicates whether the low resolution setting is correct private static bool terminalSettingValid; //indicates whether the terminal server setting is correct private static short bitsPerPixel = 0; private static bool dropShadowSettingValid; private static bool dropShadowEnabled; private static bool menuAccessKeysUnderlinedValid; private static bool menuAccessKeysUnderlined; static DisplayInformation() { SystemEvents.UserPreferenceChanging += new UserPreferenceChangingEventHandler(UserPreferenceChanging); SystemEvents.DisplaySettingsChanging += new EventHandler(DisplaySettingsChanging); } public static short BitsPerPixel { get { if (bitsPerPixel == 0) { // we used to iterate through all screens, but // for some reason unused screens can temparily appear // in the AllScreens collection - we would honor the display // setting of an unused screen. // According to EnumDisplayMonitors, a primary screen check should be sufficient bitsPerPixel = (short)Screen.PrimaryScreen.BitsPerPixel; } return bitsPerPixel; } } //////tests to see if the monitor is in low resolution mode (8-bit color depth or less). /// public static bool LowResolution { get { if (lowResSettingValid && !lowRes) { return lowRes; } // dont cache if we're in low resolution. lowRes = BitsPerPixel <= 8; lowResSettingValid = true; return lowRes; } } //////tests to see if we are under high contrast mode /// public static bool HighContrast { get { if (highContrastSettingValid) { return highContrast; } highContrast = SystemInformation.HighContrast; highContrastSettingValid = true; return highContrast; } } public static bool IsDropShadowEnabled { get { if (dropShadowSettingValid) { return dropShadowEnabled; } dropShadowEnabled = SystemInformation.IsDropShadowEnabled; dropShadowSettingValid = true; return dropShadowEnabled; } } //////test to see if we are under terminal server mode /// public static bool TerminalServer { get { if (terminalSettingValid) { return isTerminalServerSession; } isTerminalServerSession = SystemInformation.TerminalServerSession; terminalSettingValid = true; return isTerminalServerSession; } } // return if mnemonic underlines should always be there regardless of ALT public static bool MenuAccessKeysUnderlined { get { if (menuAccessKeysUnderlinedValid) { return menuAccessKeysUnderlined; } menuAccessKeysUnderlined = SystemInformation.MenuAccessKeysUnderlined; menuAccessKeysUnderlinedValid = true; return menuAccessKeysUnderlined; } } //////event handler for change in display setting /// private static void DisplaySettingsChanging(object obj, EventArgs ea) { highContrastSettingValid = false; lowResSettingValid = false; terminalSettingValid = false; dropShadowSettingValid = false; menuAccessKeysUnderlinedValid = false; } //////event handler for change in user preference /// private static void UserPreferenceChanging(object obj, UserPreferenceChangingEventArgs e) { highContrastSettingValid = false; lowResSettingValid = false; terminalSettingValid = false; dropShadowSettingValid = false; bitsPerPixel = 0; if (e.Category == UserPreferenceCategory.General) { menuAccessKeysUnderlinedValid =false; } } } } // 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
- EntityDataSourceWrapperCollection.cs
- IncrementalCompileAnalyzer.cs
- DSGeneratorProblem.cs
- HtmlElementErrorEventArgs.cs
- ListBoxItem.cs
- FormDesigner.cs
- HttpInputStream.cs
- ReturnType.cs
- ScriptControlManager.cs
- MLangCodePageEncoding.cs
- CommonProperties.cs
- ComponentChangingEvent.cs
- MessageBuilder.cs
- TrackingProfileDeserializationException.cs
- ZipPackage.cs
- XPathConvert.cs
- DataTransferEventArgs.cs
- ExpressionBinding.cs
- EntityDataSourceColumn.cs
- IODescriptionAttribute.cs
- LocalBuilder.cs
- PropertyEmitterBase.cs
- CompiledELinqQueryState.cs
- DataListItemCollection.cs
- FamilyMapCollection.cs
- GlyphShapingProperties.cs
- XmlTextReaderImplHelpers.cs
- UnsafeNativeMethods.cs
- AccessKeyManager.cs
- AuthenticationConfig.cs
- ISFClipboardData.cs
- CommandLibraryHelper.cs
- XmlKeywords.cs
- FormViewModeEventArgs.cs
- DecodeHelper.cs
- EntitySqlQueryCacheEntry.cs
- PersonalizationState.cs
- EventMemberCodeDomSerializer.cs
- VirtualPath.cs
- PrimitiveSchema.cs
- LayoutEngine.cs
- BevelBitmapEffect.cs
- Attributes.cs
- TextWriterEngine.cs
- Parser.cs
- ServiceModelConfigurationSectionGroup.cs
- CodeFieldReferenceExpression.cs
- CannotUnloadAppDomainException.cs
- ObjectItemAttributeAssemblyLoader.cs
- MouseCaptureWithinProperty.cs
- DataBoundControl.cs
- Msec.cs
- DesignRelationCollection.cs
- TreeWalker.cs
- BezierSegment.cs
- InstanceLockedException.cs
- StylusPointDescription.cs
- ErrorFormatter.cs
- GlyphShapingProperties.cs
- OperationAbortedException.cs
- CaseInsensitiveComparer.cs
- SpeechEvent.cs
- GetPageCompletedEventArgs.cs
- TypeDependencyAttribute.cs
- CharEntityEncoderFallback.cs
- TextSpanModifier.cs
- GeneralTransform3DGroup.cs
- ILGenerator.cs
- WebPartEventArgs.cs
- ToolstripProfessionalRenderer.cs
- SoapEnumAttribute.cs
- XmlNavigatorStack.cs
- DynamicVirtualDiscoSearcher.cs
- ToolboxItemFilterAttribute.cs
- CommittableTransaction.cs
- PackageRelationshipSelector.cs
- ExpressionTextBoxAutomationPeer.cs
- XmlSerializerFactory.cs
- CoTaskMemHandle.cs
- recordstatefactory.cs
- SafeLocalMemHandle.cs
- FixedSchema.cs
- PermissionRequestEvidence.cs
- NonClientArea.cs
- Schema.cs
- RegexMatchCollection.cs
- PartialTrustVisibleAssemblyCollection.cs
- EDesignUtil.cs
- TableItemProviderWrapper.cs
- Delay.cs
- Currency.cs
- ProfilePropertySettingsCollection.cs
- ErrorHandler.cs
- BitmapSourceSafeMILHandle.cs
- CodeDelegateCreateExpression.cs
- TransformationRules.cs
- NativeMethods.cs
- InheritanceUI.cs
- ReflectTypeDescriptionProvider.cs
- WindowsSysHeader.cs