Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / ButtonInternal / ButtonStandardAdapter.cs / 1305376 / ButtonStandardAdapter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.ButtonInternal { using System; using System.Diagnostics; using System.Drawing; using System.Windows.Forms.Internal; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Drawing.Text; using System.Windows.Forms; using System.Windows.Forms.Layout; using System.Windows.Forms.VisualStyles; using System.Runtime.InteropServices; using System.ComponentModel; using System.Diagnostics.CodeAnalysis; internal class ButtonStandardAdapter : ButtonBaseAdapter { private const int borderWidth = 2; internal ButtonStandardAdapter(ButtonBase control) : base(control) {} private PushButtonState DetermineState(bool up) { PushButtonState state = PushButtonState.Normal; if (!up) { state = PushButtonState.Pressed; } else if (Control.MouseIsOver) { state = PushButtonState.Hot; } else if (!Control.Enabled) { state = PushButtonState.Disabled; } else if (Control.Focused || Control.IsDefault) { state = PushButtonState.Default; } return state; } internal override void PaintUp(PaintEventArgs e, CheckState state) { PaintWorker(e, true, state); } internal override void PaintDown(PaintEventArgs e, CheckState state) { PaintWorker(e, false, state); } internal override void PaintOver(PaintEventArgs e, CheckState state) { PaintUp(e, state); } private void PaintThemedButtonBackground(PaintEventArgs e, Rectangle bounds, bool up) { PushButtonState pbState = DetermineState(up); // First handle transparent case if (ButtonRenderer.IsBackgroundPartiallyTransparent(pbState)) { ButtonRenderer.DrawParentBackground(e.Graphics, bounds, Control); } // Now draw the actual themed background ButtonRenderer.DrawButton(e.Graphics, Control.ClientRectangle, false, pbState); // Now overlay the background image or backcolor (the former overrides the latter), leaving a // margin. We hardcode this margin for now since GetThemeMargins returns 0 all the // time. //HACK We need to see what's best here. changing this to HACK because GetThemeMargins simply does not // work in some cases. bounds.Inflate(-buttonBorderSize, -buttonBorderSize); //only paint if the user said not to use the themed backcolor. if (!Control.UseVisualStyleBackColor) { bool painted = false; Color color = Control.BackColor; // Note: PaintEvent.HDC == 0 if GDI+ has used the HDC -- it wouldn't be safe for us // to use it without enough bookkeeping to negate any performance gain of using GDI. if (color.A == 255 && e.HDC != IntPtr.Zero) { if (DisplayInformation.BitsPerPixel > 8) { NativeMethods.RECT r = new NativeMethods.RECT(bounds.X, bounds.Y, bounds.Right, bounds.Bottom); SafeNativeMethods.FillRect(new HandleRef(e, e.HDC), ref r, new HandleRef(this, Control.BackColorBrush)); painted = true; } } if (!painted) { // don't paint anything from 100% transparent background // if (color.A > 0) { if (color.A == 255) { color = e.Graphics.GetNearestColor(color); } // Color has some transparency or we have no HDC, so we must // fall back to using GDI+. // using (Brush brush = new SolidBrush(color)) { e.Graphics.FillRectangle(brush, bounds); } } } } //This code is mostly taken from the non-themed rendering code path. if (Control.BackgroundImage != null && !DisplayInformation.HighContrast) { ControlPaint.DrawBackgroundImage(e.Graphics, Control.BackgroundImage, Color.Transparent, Control.BackgroundImageLayout, Control.ClientRectangle, bounds, Control.DisplayRectangle.Location, Control.RightToLeft); } } void PaintWorker(PaintEventArgs e, bool up, CheckState state) { up = up && state == CheckState.Unchecked; ColorData colors = PaintRender(e.Graphics).Calculate(); LayoutData layout; if (Application.RenderWithVisualStyles) { //don't have the text-pressed-down effect when we use themed painting //this is for consistency with win32 app. layout = PaintLayout(e, true).Layout(); } else { layout = PaintLayout(e, up).Layout(); } Graphics g = e.Graphics; Button thisbutton = this.Control as Button; if (Application.RenderWithVisualStyles) { PaintThemedButtonBackground(e, Control.ClientRectangle, up); } else { Brush backbrush = null; if (state == CheckState.Indeterminate) { backbrush = CreateDitherBrush(colors.highlight, colors.buttonFace); } try { Rectangle bounds = Control.ClientRectangle; if (up) { // We are going to draw a 2 pixel border bounds.Inflate(-borderWidth, -borderWidth); // VS Whidbey #459900 } else { // We are going to draw a 1 pixel border. bounds.Inflate(-1, -1); // VS Whidbey #503487 } PaintButtonBackground(e, bounds, backbrush); } finally { if (backbrush != null) { backbrush.Dispose(); backbrush = null; } } } PaintImage(e, layout); //inflate the focus rectangle to be consistent with the behavior of Win32 app if (Application.RenderWithVisualStyles) { layout.focus.Inflate(1, 1); } PaintField(e, layout, colors, colors.windowText, true); if (!Application.RenderWithVisualStyles) { Rectangle r = Control.ClientRectangle; if (Control.IsDefault) { r.Inflate(-1, -1); } DrawDefaultBorder(g, r, colors.windowFrame, this.Control.IsDefault); if (up) { Draw3DBorder(g, r, colors, up); } else { // contrary to popular belief, not Draw3DBorder(..., false); // ControlPaint.DrawBorder(g, r, colors.buttonShadow, ButtonBorderStyle.Solid); } } } #region Layout protected override LayoutOptions Layout(PaintEventArgs e) { LayoutOptions layout = PaintLayout(e, /* up = */ false); Debug.Assert(layout.GetPreferredSizeCore(LayoutUtils.MaxSize) == PaintLayout(e, /* up = */ true).GetPreferredSizeCore(LayoutUtils.MaxSize), "The state of up should not effect PreferredSize"); return layout; } [SuppressMessage("Microsoft.Performance", "CA1801:AvoidUnusedParameters")] // removed graphics, may have to put it back private LayoutOptions PaintLayout(PaintEventArgs e, bool up) { LayoutOptions layout = CommonLayout(); layout.textOffset = !up; layout.everettButtonCompat = !Application.RenderWithVisualStyles; return layout; } #endregion } } // 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
- EntityChangedParams.cs
- EventDescriptorCollection.cs
- Assembly.cs
- MemberPath.cs
- DataGridViewImageColumn.cs
- RadioButtonStandardAdapter.cs
- SQLCharsStorage.cs
- PersistNameAttribute.cs
- Graphics.cs
- EventListener.cs
- DataColumnMapping.cs
- RectangleF.cs
- DataTableReader.cs
- OdbcPermission.cs
- cryptoapiTransform.cs
- ObjectFactoryCodeDomTreeGenerator.cs
- MembershipPasswordException.cs
- CompositionTarget.cs
- InstanceKeyNotReadyException.cs
- ValidationError.cs
- TreeViewHitTestInfo.cs
- AmbientProperties.cs
- DatePickerTextBox.cs
- DataControlCommands.cs
- ListSourceHelper.cs
- PageTheme.cs
- FileDialogCustomPlacesCollection.cs
- TextTreeInsertUndoUnit.cs
- OpenTypeCommon.cs
- XPathNavigatorKeyComparer.cs
- InvalidProgramException.cs
- WindowsButton.cs
- Input.cs
- StyleXamlParser.cs
- BaseCAMarshaler.cs
- SqlClientWrapperSmiStreamChars.cs
- LinearKeyFrames.cs
- LabelLiteral.cs
- CodePageEncoding.cs
- Soap11ServerProtocol.cs
- AnnotationHelper.cs
- DataGridCaption.cs
- ClientEventManager.cs
- ActivityTrace.cs
- StorageRoot.cs
- DeferredBinaryDeserializerExtension.cs
- RawContentTypeMapper.cs
- selecteditemcollection.cs
- InfoCardAsymmetricCrypto.cs
- Point4DValueSerializer.cs
- ISAPIWorkerRequest.cs
- CodeStatement.cs
- EncodingDataItem.cs
- DataTableMapping.cs
- Source.cs
- XmlSchemaCompilationSettings.cs
- SessionStateUtil.cs
- OptimalBreakSession.cs
- CreateSequenceResponse.cs
- ObjectStateEntryOriginalDbUpdatableDataRecord.cs
- FileVersion.cs
- Assert.cs
- Odbc32.cs
- _ListenerAsyncResult.cs
- Soap.cs
- ImageConverter.cs
- RemotingSurrogateSelector.cs
- RepeatBehaviorConverter.cs
- EventProviderClassic.cs
- DocumentOrderComparer.cs
- QueryParameter.cs
- StateChangeEvent.cs
- StartFileNameEditor.cs
- DocumentPageView.cs
- ScaleTransform3D.cs
- InfocardExtendedInformationCollection.cs
- DiagnosticEventProvider.cs
- HttpRequestWrapper.cs
- DeviceSpecificDesigner.cs
- Block.cs
- InvalidAsynchronousStateException.cs
- StreamGeometry.cs
- TraceContextRecord.cs
- StrokeDescriptor.cs
- COMException.cs
- CleanUpVirtualizedItemEventArgs.cs
- SystemResources.cs
- DesignBindingPropertyDescriptor.cs
- EnumConverter.cs
- Operators.cs
- SpAudioStreamWrapper.cs
- DateTimeFormat.cs
- WebPartEditVerb.cs
- Model3DGroup.cs
- DbSourceParameterCollection.cs
- EntityTypeEmitter.cs
- Stylesheet.cs
- UdpChannelListener.cs
- BufferModeSettings.cs
- ApplicationDirectory.cs