Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / CheckBoxRenderer.cs / 1 / CheckBoxRenderer.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Drawing; using System.Diagnostics.CodeAnalysis; using System.Windows.Forms.Internal; using System.Windows.Forms.VisualStyles; using Microsoft.Win32; ////// /// public sealed class CheckBoxRenderer { //Make this per-thread, so that different threads can safely use these methods. [ThreadStatic] private static VisualStyleRenderer visualStyleRenderer = null; private static readonly VisualStyleElement CheckBoxElement = VisualStyleElement.Button.CheckBox.UncheckedNormal; private static bool renderMatchingApplicationState = true; //cannot instantiate private CheckBoxRenderer() { } ////// This is a rendering class for the CheckBox control. It works downlevel too (obviously /// without visual styles applied.) /// ////// /// public static bool RenderMatchingApplicationState { get { return renderMatchingApplicationState; } set { renderMatchingApplicationState = value; } } private static bool RenderWithVisualStyles { get { return (!renderMatchingApplicationState || Application.RenderWithVisualStyles); } } ////// If this property is true, then the renderer will use the setting from Application.RenderWithVisualStyles to /// determine how to render. /// If this property is false, the renderer will always render with visualstyles. /// ////// /// public static bool IsBackgroundPartiallyTransparent(CheckBoxState state) { if (RenderWithVisualStyles) { InitializeRenderer((int)state); return visualStyleRenderer.IsBackgroundPartiallyTransparent(); } else { return false; //for downlevel, this is false } } ////// Returns true if the background corresponding to the given state is partially transparent, else false. /// ////// /// [ SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters") // Using Graphics instead of IDeviceContext intentionally ] public static void DrawParentBackground(Graphics g, Rectangle bounds, Control childControl) { if (RenderWithVisualStyles) { InitializeRenderer(0); visualStyleRenderer.DrawParentBackground(g, bounds, childControl); } } ////// This is just a convenience wrapper for VisualStyleRenderer.DrawThemeParentBackground. For downlevel, /// this isn't required and does nothing. /// ////// /// public static void DrawCheckBox(Graphics g, Point glyphLocation, CheckBoxState state) { Rectangle glyphBounds = new Rectangle(glyphLocation, GetGlyphSize(g, state)); if (RenderWithVisualStyles) { InitializeRenderer((int)state); visualStyleRenderer.DrawBackground(g, glyphBounds); } else { if (IsMixed(state)) { ControlPaint.DrawMixedCheckBox(g, glyphBounds, ConvertToButtonState(state)); } else { ControlPaint.DrawCheckBox(g, glyphBounds, ConvertToButtonState(state)); } } } ////// Renders a CheckBox control. /// ////// /// public static void DrawCheckBox(Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, bool focused, CheckBoxState state) { DrawCheckBox(g, glyphLocation, textBounds, checkBoxText, font, TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.SingleLine, focused, state); } ////// Renders a CheckBox control. /// ////// /// public static void DrawCheckBox(Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, TextFormatFlags flags, bool focused, CheckBoxState state) { Rectangle glyphBounds = new Rectangle(glyphLocation, GetGlyphSize(g, state)); Color textColor; if (RenderWithVisualStyles) { InitializeRenderer((int)state); visualStyleRenderer.DrawBackground(g, glyphBounds); textColor = visualStyleRenderer.GetColor(ColorProperty.TextColor); } else { if (IsMixed(state)) { ControlPaint.DrawMixedCheckBox(g, glyphBounds, ConvertToButtonState(state)); } else { ControlPaint.DrawCheckBox(g, glyphBounds, ConvertToButtonState(state)); } textColor = SystemColors.ControlText; } TextRenderer.DrawText(g, checkBoxText, font, textBounds, textColor, flags); if (focused) { ControlPaint.DrawFocusRectangle(g, textBounds); } } ////// Renders a CheckBox control. /// ////// /// public static void DrawCheckBox(Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, Image image, Rectangle imageBounds, bool focused, CheckBoxState state) { DrawCheckBox(g, glyphLocation, textBounds, checkBoxText, font, TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.SingleLine, image, imageBounds, focused, state); } ////// Renders a CheckBox control. /// ////// /// public static void DrawCheckBox(Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, TextFormatFlags flags, Image image, Rectangle imageBounds, bool focused, CheckBoxState state) { Rectangle glyphBounds = new Rectangle(glyphLocation, GetGlyphSize(g, state)); Color textColor; if (RenderWithVisualStyles) { InitializeRenderer((int)state); //Keep this drawing order! It matches default drawing order. visualStyleRenderer.DrawImage(g, imageBounds, image); visualStyleRenderer.DrawBackground(g, glyphBounds); textColor = visualStyleRenderer.GetColor(ColorProperty.TextColor); } else { g.DrawImage(image, imageBounds); if (IsMixed(state)) { ControlPaint.DrawMixedCheckBox(g, glyphBounds, ConvertToButtonState(state)); } else { ControlPaint.DrawCheckBox(g, glyphBounds, ConvertToButtonState(state)); } textColor = SystemColors.ControlText; } TextRenderer.DrawText(g, checkBoxText, font, textBounds, textColor, flags); if (focused) { ControlPaint.DrawFocusRectangle(g, textBounds); } } ////// Renders a CheckBox control. /// ////// /// [ SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters") // Using Graphics instead of IDeviceContext intentionally ] public static Size GetGlyphSize(Graphics g, CheckBoxState state) { if (RenderWithVisualStyles) { InitializeRenderer((int)state); return visualStyleRenderer.GetPartSize(g, ThemeSizeType.Draw); } return new Size(13, 13); } internal static ButtonState ConvertToButtonState(CheckBoxState state) { switch (state) { case CheckBoxState.CheckedNormal: case CheckBoxState.CheckedHot: return ButtonState.Checked; case CheckBoxState.CheckedPressed: return (ButtonState.Checked | ButtonState.Pushed); case CheckBoxState.CheckedDisabled: return (ButtonState.Checked | ButtonState.Inactive); case CheckBoxState.UncheckedPressed: return ButtonState.Pushed; case CheckBoxState.UncheckedDisabled: return ButtonState.Inactive; //Downlevel mixed drawing works only if ButtonState.Checked is set case CheckBoxState.MixedNormal: case CheckBoxState.MixedHot: return ButtonState.Checked; case CheckBoxState.MixedPressed: return (ButtonState.Checked | ButtonState.Pushed); case CheckBoxState.MixedDisabled: return (ButtonState.Checked | ButtonState.Inactive); default: return ButtonState.Normal; } } internal static CheckBoxState ConvertFromButtonState(ButtonState state, bool isMixed, bool isHot) { if (isMixed) { if ((state & ButtonState.Pushed) == ButtonState.Pushed) { return CheckBoxState.MixedPressed; } else if ((state & ButtonState.Inactive) == ButtonState.Inactive) { return CheckBoxState.MixedDisabled; } else if (isHot) { return CheckBoxState.MixedHot; } return CheckBoxState.MixedNormal; } else if ((state & ButtonState.Checked) == ButtonState.Checked) { if ((state & ButtonState.Pushed) == ButtonState.Pushed) { return CheckBoxState.CheckedPressed; } else if ((state & ButtonState.Inactive) == ButtonState.Inactive) { return CheckBoxState.CheckedDisabled; } else if (isHot) { return CheckBoxState.CheckedHot; } return CheckBoxState.CheckedNormal; } else { //unchecked if ((state & ButtonState.Pushed) == ButtonState.Pushed) { return CheckBoxState.UncheckedPressed; } else if ((state & ButtonState.Inactive) == ButtonState.Inactive) { return CheckBoxState.UncheckedDisabled; } else if (isHot) { return CheckBoxState.UncheckedHot; } return CheckBoxState.UncheckedNormal; } } private static bool IsMixed(CheckBoxState state) { switch (state) { case CheckBoxState.MixedNormal: case CheckBoxState.MixedHot: case CheckBoxState.MixedPressed: case CheckBoxState.MixedDisabled: return true; default: return false; } } private static void InitializeRenderer(int state) { if (visualStyleRenderer == null) { visualStyleRenderer = new VisualStyleRenderer(CheckBoxElement.ClassName, CheckBoxElement.Part, state); } else { visualStyleRenderer.SetParameters(CheckBoxElement.ClassName, CheckBoxElement.Part, state); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved./// Returns the size of the CheckBox glyph. /// ///
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- LabelEditEvent.cs
- QueryConverter.cs
- RuntimeIdentifierPropertyAttribute.cs
- ReferentialConstraintRoleElement.cs
- JsonFormatWriterGenerator.cs
- ListItemCollection.cs
- InstanceCreationEditor.cs
- FilterElement.cs
- ListBindingHelper.cs
- Vector3DCollectionConverter.cs
- WebPartManagerInternals.cs
- CompilationPass2Task.cs
- SubclassTypeValidatorAttribute.cs
- Application.cs
- DescendantBaseQuery.cs
- Visual3D.cs
- TemplateManager.cs
- StringFormat.cs
- ClientConfigurationHost.cs
- EncoderBestFitFallback.cs
- RootProfilePropertySettingsCollection.cs
- CombinedGeometry.cs
- SimpleRecyclingCache.cs
- Int16AnimationUsingKeyFrames.cs
- HttpProfileBase.cs
- StrongNameMembershipCondition.cs
- DataGridViewTextBoxEditingControl.cs
- TextEditorCopyPaste.cs
- MarkupCompiler.cs
- XmlNamedNodeMap.cs
- RoutedEventConverter.cs
- MgmtConfigurationRecord.cs
- JoinGraph.cs
- NamespaceImport.cs
- TextRangeAdaptor.cs
- DataGridTablesFactory.cs
- XpsSerializerWriter.cs
- ProcessHost.cs
- XPathNodePointer.cs
- UpdateException.cs
- SQLUtility.cs
- safelinkcollection.cs
- DecoderFallbackWithFailureFlag.cs
- X509Certificate.cs
- ThicknessKeyFrameCollection.cs
- ContentHostHelper.cs
- StringWriter.cs
- BamlRecordReader.cs
- ValidatingReaderNodeData.cs
- StreamGeometry.cs
- PathData.cs
- VsPropertyGrid.cs
- FixedSOMLineCollection.cs
- entityreference_tresulttype.cs
- TickBar.cs
- TextContainer.cs
- GatewayDefinition.cs
- ObjectTypeMapping.cs
- InputBinding.cs
- XNodeSchemaApplier.cs
- CardSpacePolicyElement.cs
- transactioncontext.cs
- TemplateAction.cs
- BindingContext.cs
- CustomErrorCollection.cs
- TypeSystemProvider.cs
- FormViewUpdatedEventArgs.cs
- XmlLinkedNode.cs
- UnauthorizedWebPart.cs
- VisualState.cs
- X509SubjectKeyIdentifierClause.cs
- InputProviderSite.cs
- HttpHandlersSection.cs
- PerformanceCounterCategory.cs
- GridEntry.cs
- HwndHost.cs
- FixedSOMPageConstructor.cs
- InputLangChangeRequestEvent.cs
- XmlNodeChangedEventArgs.cs
- XamlSerializer.cs
- DocobjHost.cs
- PathFigureCollection.cs
- ArraySet.cs
- TemplatedMailWebEventProvider.cs
- ByteStreamGeometryContext.cs
- XmlDocument.cs
- ExpressionConverter.cs
- ResourceCollectionInfo.cs
- DocumentPaginator.cs
- FlowDocumentScrollViewer.cs
- ClientTargetCollection.cs
- ConstructorNeedsTagAttribute.cs
- XmlTextAttribute.cs
- XPathEmptyIterator.cs
- DynamicILGenerator.cs
- SchemaType.cs
- TransactionValidationBehavior.cs
- WpfMemberInvoker.cs
- FileVersion.cs
- AttachedAnnotationChangedEventArgs.cs