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
- XPathNodePointer.cs
- Addressing.cs
- UniqueEventHelper.cs
- XmlWellformedWriter.cs
- DummyDataSource.cs
- ComponentEditorForm.cs
- ConfigurationManager.cs
- SoapExtension.cs
- ToolboxComponentsCreatedEventArgs.cs
- BamlLocalizer.cs
- ManagementOptions.cs
- StreamMarshaler.cs
- RotateTransform.cs
- TextTreeTextBlock.cs
- CanonicalFormWriter.cs
- Win32MouseDevice.cs
- TableLayoutRowStyleCollection.cs
- ExceptionHelpers.cs
- NCryptNative.cs
- ToolTip.cs
- __FastResourceComparer.cs
- WhitespaceRule.cs
- BindingListCollectionView.cs
- StaticContext.cs
- MappingSource.cs
- DynamicPhysicalDiscoSearcher.cs
- FigureHelper.cs
- ItemDragEvent.cs
- DataBinder.cs
- ClientProxyGenerator.cs
- ILGenerator.cs
- CacheMemory.cs
- wgx_render.cs
- HttpResponseInternalWrapper.cs
- LinkedList.cs
- WebPartUtil.cs
- PersonalizationState.cs
- Pair.cs
- MemberPathMap.cs
- DataGridViewUtilities.cs
- DrawingCollection.cs
- ColorBlend.cs
- ActivityDesignerAccessibleObject.cs
- CustomErrorCollection.cs
- BindUriHelper.cs
- Font.cs
- NativeMethods.cs
- ServerType.cs
- ValidationHelper.cs
- SqlConnectionFactory.cs
- DispatcherEventArgs.cs
- SuppressMessageAttribute.cs
- ToolboxComponentsCreatingEventArgs.cs
- FormView.cs
- ListControl.cs
- XmlSchemaAttribute.cs
- DetailsViewInsertedEventArgs.cs
- BidOverLoads.cs
- CancelEventArgs.cs
- RightsManagementManager.cs
- ActivityBindForm.cs
- RenderDataDrawingContext.cs
- OpenTypeLayout.cs
- RelationshipEnd.cs
- XhtmlBasicCalendarAdapter.cs
- FormsAuthenticationUser.cs
- FastPropertyAccessor.cs
- ServicePrincipalNameElement.cs
- LineMetrics.cs
- EdmProperty.cs
- RunWorkerCompletedEventArgs.cs
- DesignTimeResourceProviderFactoryAttribute.cs
- Parallel.cs
- ComplexPropertyEntry.cs
- Group.cs
- WindowsGraphicsWrapper.cs
- UnsafeNativeMethods.cs
- MimeMapping.cs
- DateRangeEvent.cs
- RoleGroup.cs
- ContextMenuStripGroup.cs
- HttpStreams.cs
- RemotingConfiguration.cs
- ObfuscateAssemblyAttribute.cs
- RelatedImageListAttribute.cs
- TypeDescriptor.cs
- BamlBinaryReader.cs
- FunctionImportElement.cs
- WS2007HttpBindingElement.cs
- DataGridViewRowCancelEventArgs.cs
- Certificate.cs
- TraceLog.cs
- WsiProfilesElementCollection.cs
- SchemaRegistration.cs
- UiaCoreApi.cs
- DriveNotFoundException.cs
- DataSourceViewSchemaConverter.cs
- SingleAnimationUsingKeyFrames.cs
- UITypeEditor.cs
- bindurihelper.cs