Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / 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. // //----------------------------------------------------------------------------- /* */ 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- Enum.cs
- Utils.cs
- Pen.cs
- ProjectionCamera.cs
- Accessors.cs
- ListSurrogate.cs
- ElementFactory.cs
- EditorBrowsableAttribute.cs
- GridViewDeletedEventArgs.cs
- DefaultTypeArgumentAttribute.cs
- FileLogRecordEnumerator.cs
- CopyAction.cs
- dsa.cs
- TypeResolver.cs
- DataSetFieldSchema.cs
- CaseInsensitiveComparer.cs
- DbConnectionPool.cs
- TableRow.cs
- HighContrastHelper.cs
- MessageFault.cs
- XmlSchemaDatatype.cs
- BitmapEffectGroup.cs
- basevalidator.cs
- CatalogPart.cs
- CharacterBufferReference.cs
- Table.cs
- DesignerTextViewAdapter.cs
- UidManager.cs
- XpsDocument.cs
- AssemblyUtil.cs
- TraceUtility.cs
- DataObjectCopyingEventArgs.cs
- SiblingIterators.cs
- PolyLineSegment.cs
- LinkUtilities.cs
- EpmContentDeSerializer.cs
- HttpCookieCollection.cs
- CssTextWriter.cs
- PropertyEmitter.cs
- Calendar.cs
- BufferedWebEventProvider.cs
- QueryHandler.cs
- CachedFontFace.cs
- CellNormalizer.cs
- SQLDouble.cs
- RestHandlerFactory.cs
- EnvironmentPermission.cs
- DisplayMemberTemplateSelector.cs
- FileRecordSequenceHelper.cs
- XmlDictionaryReaderQuotas.cs
- FileDialog.cs
- _KerberosClient.cs
- CodeGenerator.cs
- CngKeyBlobFormat.cs
- GeometryCombineModeValidation.cs
- TlsSspiNegotiation.cs
- DataGridViewBindingCompleteEventArgs.cs
- WebServiceParameterData.cs
- TextEditorThreadLocalStore.cs
- IssuedTokenClientBehaviorsElementCollection.cs
- FormCollection.cs
- HttpStreams.cs
- OperationCanceledException.cs
- MetadataItemSerializer.cs
- GridViewHeaderRowPresenterAutomationPeer.cs
- ISCIIEncoding.cs
- Atom10ItemFormatter.cs
- TypeNameConverter.cs
- codemethodreferenceexpression.cs
- WinInet.cs
- SourceSwitch.cs
- FileDialog_Vista.cs
- QilReference.cs
- CompositionTarget.cs
- UiaCoreApi.cs
- PeerDefaultCustomResolverClient.cs
- LogExtentCollection.cs
- ResourceIDHelper.cs
- Point3DCollection.cs
- PolicyImporterElementCollection.cs
- ReflectPropertyDescriptor.cs
- RemotingSurrogateSelector.cs
- QilParameter.cs
- EditCommandColumn.cs
- DockPanel.cs
- DbProviderSpecificTypePropertyAttribute.cs
- ListControl.cs
- InternalBufferOverflowException.cs
- Calendar.cs
- TraceFilter.cs
- SchemaNames.cs
- EntityContainer.cs
- CmsInterop.cs
- DataSourceView.cs
- IsolatedStoragePermission.cs
- SmiContext.cs
- DynamicRenderer.cs
- PolicyManager.cs
- AuthenticationManager.cs
- XmlSerializerImportOptions.cs