Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / PtsHost / SectionVisual.cs / 1305600 / SectionVisual.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: SectionVisual.cs // // Description: Visual representing a section. // // History: // 05/20/2003 : [....] - created. // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Windows; using System.Windows.Media; using System.Windows.Threading; using MS.Internal.Text; using MS.Internal.PtsHost.UnsafeNativeMethods; namespace MS.Internal.PtsHost { // --------------------------------------------------------------------- // Visual representing a section. // --------------------------------------------------------------------- internal class SectionVisual : DrawingVisual { // ------------------------------------------------------------------ // Constructor. // ----------------------------------------------------------------- internal SectionVisual() { } // ------------------------------------------------------------------ // Set information about column rules that are necessary for rendering // process. Draw column rules if necessary. // // arrayColumnDesc - column description including rectangle coordinates, etc // columnVStart - vertical start coordinate of column rule // columnHeight - height of column rule // columnProperties - column properties. // ------------------------------------------------------------------ internal void DrawColumnRules(ref PTS.FSTRACKDESCRIPTION[] arrayColumnDesc, double columnVStart, double columnHeight, ColumnPropertiesGroup columnProperties) { // Compute column rules data first. Point[] rulePositions = null; double ruleWidth = columnProperties.ColumnRuleWidth; if (arrayColumnDesc.Length > 1) { if (ruleWidth > 0) { int gapWidth = (arrayColumnDesc[1].fsrc.u - (arrayColumnDesc[0].fsrc.u + arrayColumnDesc[0].fsrc.du)) / 2; rulePositions = new Point[(arrayColumnDesc.Length - 1)*2]; for (int index = 1; index < arrayColumnDesc.Length; index++) { double u = TextDpi.FromTextDpi(arrayColumnDesc[index].fsrc.u - gapWidth); double v = columnVStart; double dv = columnHeight; rulePositions[(index-1)*2].X = u; rulePositions[(index-1)*2].Y = v; rulePositions[(index-1)*2+1].X = u; rulePositions[(index-1)*2+1].Y = v + dv; } } } // Check if update of the visual render data is needed. bool needsUpdate = _ruleWidth != ruleWidth; if (!needsUpdate && _rulePositions != rulePositions) { int prevSize = _rulePositions == null ? 0 : _rulePositions.Length; int newSize = rulePositions == null ? 0 : rulePositions.Length; if (prevSize == newSize) { for (int index = 0; index < rulePositions.Length; index++) { if (!DoubleUtil.AreClose(rulePositions[index].X, _rulePositions[index].X) || !DoubleUtil.AreClose(rulePositions[index].Y, _rulePositions[index].Y)) { needsUpdate = true; break; } } } else { needsUpdate = true; } } // Draw column rules if necessary if (needsUpdate) { _ruleWidth = ruleWidth; _rulePositions = rulePositions; // Open DrawingContext and draw background. // If background is not set, Open will clear the render data, but it // will preserve visual children. using (DrawingContext dc = RenderOpen()) { if (rulePositions != null) { // We do not want to cause the user's Brush to become frozen when we // freeze pen below, therefore we make our own copy of the Brush if // it is not already frozen. Brush columnRuleBrush = (Brush)FreezableOperations.GetAsFrozenIfPossible(columnProperties.ColumnRuleBrush); Pen pen = new Pen(columnRuleBrush, ruleWidth); // Freeze the pen if possible. Doing this avoids the overhead of // maintaining changed handlers. if (pen.CanFreeze) { pen.Freeze(); } for (int index = 0; index < rulePositions.Length; index += 2) { dc.DrawLine(pen, rulePositions[index], rulePositions[index + 1]); } } } } } // ----------------------------------------------------------------- // Column rules positions // ------------------------------------------------------------------ private Point[] _rulePositions; // ----------------------------------------------------------------- // Pen for column rule. // ----------------------------------------------------------------- private double _ruleWidth; } } // 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
- QuaternionKeyFrameCollection.cs
- XmlHierarchicalEnumerable.cs
- CapabilitiesRule.cs
- ProvidersHelper.cs
- DataException.cs
- Span.cs
- unsafeIndexingFilterStream.cs
- BezierSegment.cs
- EntityDataSourceState.cs
- SuspendDesigner.cs
- ExpressionHelper.cs
- PatternMatcher.cs
- SecurityRuntime.cs
- FunctionImportMapping.cs
- TextBoxLine.cs
- Transform3DCollection.cs
- ClaimComparer.cs
- DbConnectionPoolOptions.cs
- AvTrace.cs
- RangeExpression.cs
- HttpApplicationFactory.cs
- Context.cs
- AutomationAttributeInfo.cs
- DataAdapter.cs
- IPipelineRuntime.cs
- WindowsSpinner.cs
- ObjectContextServiceProvider.cs
- TableItemPattern.cs
- Rfc2898DeriveBytes.cs
- Parser.cs
- AssemblyInfo.cs
- ClientRuntimeConfig.cs
- TypefaceMetricsCache.cs
- SpeakProgressEventArgs.cs
- JapaneseCalendar.cs
- ClassicBorderDecorator.cs
- DefaultTextStore.cs
- SourceFileBuildProvider.cs
- InputBinder.cs
- PropertyConverter.cs
- ListQueryResults.cs
- DistributedTransactionPermission.cs
- Convert.cs
- FileSystemEnumerable.cs
- GCHandleCookieTable.cs
- PeerConnector.cs
- ShaderRenderModeValidation.cs
- ReadOnlyCollectionBase.cs
- ChannelSinkStacks.cs
- WsdlInspector.cs
- LogLogRecordEnumerator.cs
- BaseTemplateParser.cs
- UpdatePanel.cs
- AnnotationHelper.cs
- TokenBasedSetEnumerator.cs
- DetailsViewInsertEventArgs.cs
- NotifyCollectionChangedEventArgs.cs
- TraceFilter.cs
- FontSource.cs
- DataTableMapping.cs
- ObservableCollection.cs
- PropertyDescriptorComparer.cs
- PictureBoxDesigner.cs
- DrawingGroup.cs
- InputScopeManager.cs
- ServerValidateEventArgs.cs
- recordstatescratchpad.cs
- ToolStripLocationCancelEventArgs.cs
- SplineQuaternionKeyFrame.cs
- Models.cs
- FlowDocumentReader.cs
- ConcurrentStack.cs
- Stack.cs
- Qualifier.cs
- MetadataCollection.cs
- Cursors.cs
- RegexCaptureCollection.cs
- WebPartHeaderCloseVerb.cs
- GenerateHelper.cs
- ObjectIDGenerator.cs
- TrustManagerPromptUI.cs
- ScrollItemProviderWrapper.cs
- FileAuthorizationModule.cs
- TableTextElementCollectionInternal.cs
- UnionCqlBlock.cs
- ParameterCollectionEditor.cs
- latinshape.cs
- EncryptedKey.cs
- OleDbInfoMessageEvent.cs
- HttpRuntime.cs
- RotateTransform.cs
- IdentityReference.cs
- HeaderUtility.cs
- TablePatternIdentifiers.cs
- XmlHierarchyData.cs
- EpmSyndicationContentSerializer.cs
- PropertyGeneratedEventArgs.cs
- MessagePartProtectionMode.cs
- DescriptionAttribute.cs
- ClosureBinding.cs