Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / DataGridViewTextBoxEditingControl.cs / 1 / DataGridViewTextBoxEditingControl.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Drawing; using System.Security.Permissions; using System.Diagnostics; using System.Runtime.InteropServices; ///[ ComVisible(true), ClassInterface(ClassInterfaceType.AutoDispatch) ] public class DataGridViewTextBoxEditingControl : TextBox, IDataGridViewEditingControl { private static readonly DataGridViewContentAlignment anyTop = DataGridViewContentAlignment.TopLeft | DataGridViewContentAlignment.TopCenter | DataGridViewContentAlignment.TopRight; private static readonly DataGridViewContentAlignment anyRight = DataGridViewContentAlignment.TopRight | DataGridViewContentAlignment.MiddleRight | DataGridViewContentAlignment.BottomRight; private static readonly DataGridViewContentAlignment anyCenter = DataGridViewContentAlignment.TopCenter | DataGridViewContentAlignment.MiddleCenter | DataGridViewContentAlignment.BottomCenter; private DataGridView dataGridView; private bool valueChanged; private bool repositionOnValueChange; private int rowIndex; /// public DataGridViewTextBoxEditingControl() : base() { this.TabStop = false; } /// public virtual DataGridView EditingControlDataGridView { get { return this.dataGridView; } set { this.dataGridView = value; } } /// public virtual object EditingControlFormattedValue { get { return GetEditingControlFormattedValue(DataGridViewDataErrorContexts.Formatting); } set { this.Text = (string) value; } } /// public virtual int EditingControlRowIndex { get { return this.rowIndex; } set { this.rowIndex = value; } } /// public virtual bool EditingControlValueChanged { get { return this.valueChanged; } set { this.valueChanged = value; } } /// public virtual Cursor EditingPanelCursor { get { return Cursors.Default; } } /// public virtual bool RepositionEditingControlOnValueChange { get { return this.repositionOnValueChange; } } /// public virtual void ApplyCellStyleToEditingControl(DataGridViewCellStyle dataGridViewCellStyle) { this.Font = dataGridViewCellStyle.Font; if (dataGridViewCellStyle.BackColor.A < 255) { // Our TextBox does not support transparent back colors Color opaqueBackColor = Color.FromArgb(255, dataGridViewCellStyle.BackColor); this.BackColor = opaqueBackColor; this.dataGridView.EditingPanel.BackColor = opaqueBackColor; } else { this.BackColor = dataGridViewCellStyle.BackColor; } this.ForeColor = dataGridViewCellStyle.ForeColor; if (dataGridViewCellStyle.WrapMode == DataGridViewTriState.True) { this.WordWrap = true; } this.TextAlign = TranslateAlignment(dataGridViewCellStyle.Alignment); this.repositionOnValueChange = (dataGridViewCellStyle.WrapMode == DataGridViewTriState.True && (dataGridViewCellStyle.Alignment & anyTop) == 0); } /// public virtual bool EditingControlWantsInputKey(Keys keyData, bool dataGridViewWantsInputKey) { switch (keyData & Keys.KeyCode) { case Keys.Right: // If the end of the selection is at the end of the string // let the DataGridView treat the key message if ((this.RightToLeft == RightToLeft.No && !(this.SelectionLength == 0 && this.SelectionStart == this.Text.Length)) || (this.RightToLeft == RightToLeft.Yes && !(this.SelectionLength == 0 && this.SelectionStart == 0))) { return true; } break; case Keys.Left: // If the end of the selection is at the begining of the string // or if the entire text is selected and we did not start editing // send this character to the dataGridView, else process the key event if ((this.RightToLeft == RightToLeft.No && !(this.SelectionLength == 0 && this.SelectionStart == 0)) || (this.RightToLeft == RightToLeft.Yes && !(this.SelectionLength == 0 && this.SelectionStart == this.Text.Length))) { return true; } break; case Keys.Down: // If the end of the selection is on the last line of the text then // send this character to the dataGridView, else process the key event int end = this.SelectionStart + this.SelectionLength; if (this.Text.IndexOf("\r\n", end) != -1) { return true; } break; case Keys.Up: // If the end of the selection is on the first line of the text then // send this character to the dataGridView, else process the key event if (!(this.Text.IndexOf("\r\n") < 0 || this.SelectionStart + this.SelectionLength < this.Text.IndexOf("\r\n"))) { return true; } break; case Keys.Home: case Keys.End: if (this.SelectionLength != this.Text.Length) { return true; } break; case Keys.Prior: case Keys.Next: if (this.valueChanged) { return true; } break; case Keys.Delete: if (this.SelectionLength > 0 || this.SelectionStart < this.Text.Length) { return true; } break; case Keys.Enter: if ((keyData & (Keys.Control | Keys.Shift | Keys.Alt)) == Keys.Shift && this.Multiline && this.AcceptsReturn) { return true; } break; } return !dataGridViewWantsInputKey; } /// public virtual object GetEditingControlFormattedValue(DataGridViewDataErrorContexts context) { return this.Text; } /// public virtual void PrepareEditingControlForEdit(bool selectAll) { if (selectAll) { SelectAll(); } else { // Do not select all the text, but // position the caret at the end of the text this.SelectionStart = this.Text.Length; } } private void NotifyDataGridViewOfValueChange() { this.valueChanged = true; this.dataGridView.NotifyCurrentCellDirty(true); } /// protected override void OnMouseWheel(MouseEventArgs e) { // Forwarding to grid control. Can't prevent the TextBox from handling the mouse wheel as expected. this.dataGridView.OnMouseWheelInternal(e); } /// protected override void OnTextChanged(EventArgs e) { base.OnTextChanged(e); // Let the DataGridView know about the value change NotifyDataGridViewOfValueChange(); } /// [ SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode), ] protected override bool ProcessKeyEventArgs(ref Message m) { switch ((Keys)(int) m.WParam) { case Keys.Enter: if (m.Msg == NativeMethods.WM_CHAR && !(ModifierKeys == Keys.Shift && this.Multiline && this.AcceptsReturn)) { // Ignore the Enter key and don't add it to the textbox content. This happens when failing validation brings // up a dialog box for example. // Shift-Enter for multiline textboxes need to be accepted however. return true; } break; case Keys.LineFeed: if (m.Msg == NativeMethods.WM_CHAR && ModifierKeys == Keys.Control && this.Multiline && this.AcceptsReturn) { // Ignore linefeed character when user hits Ctrl-Enter to commit the cell. return true; } break; case Keys.A: if (m.Msg == NativeMethods.WM_KEYDOWN && ModifierKeys == Keys.Control) { SelectAll(); return true; } break; } return base.ProcessKeyEventArgs(ref m); } private static HorizontalAlignment TranslateAlignment(DataGridViewContentAlignment align) { if ((align & anyRight) != 0) { return HorizontalAlignment.Right; } else if ((align & anyCenter) != 0) { return HorizontalAlignment.Center; } else { return HorizontalAlignment.Left; } } } } // 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
- MarshalByValueComponent.cs
- WebPartConnectionsCancelVerb.cs
- WebPageTraceListener.cs
- TransformerInfoCollection.cs
- XmlBinaryReaderSession.cs
- TableRow.cs
- SoapSchemaMember.cs
- SQLDecimal.cs
- DrawingContextWalker.cs
- VirtualPath.cs
- DataGridView.cs
- DbConnectionFactory.cs
- FolderLevelBuildProviderCollection.cs
- MemoryRecordBuffer.cs
- DynamicValueConverter.cs
- CleanUpVirtualizedItemEventArgs.cs
- BaseDataListActionList.cs
- PasswordTextContainer.cs
- PrintDocument.cs
- MimeMapping.cs
- StreamReader.cs
- _ListenerAsyncResult.cs
- ObjectList.cs
- _UriSyntax.cs
- DataTemplateSelector.cs
- LinkLabel.cs
- PriorityChain.cs
- DoubleAnimation.cs
- DesignerSerializerAttribute.cs
- ECDiffieHellmanCng.cs
- JavaScriptSerializer.cs
- WmlLabelAdapter.cs
- RenderContext.cs
- SelectionPattern.cs
- PassportAuthentication.cs
- PingOptions.cs
- UidManager.cs
- FixedSOMPageElement.cs
- ExternalException.cs
- DataGridTablesFactory.cs
- ListControl.cs
- RequestContext.cs
- ReadOnlyDataSourceView.cs
- PopOutPanel.cs
- BuildProvider.cs
- RenderDataDrawingContext.cs
- WindowVisualStateTracker.cs
- XMLSyntaxException.cs
- SuppressMessageAttribute.cs
- XmlNode.cs
- __TransparentProxy.cs
- Update.cs
- MessageAction.cs
- StringAnimationBase.cs
- FontStyles.cs
- ValidationSummaryDesigner.cs
- AlgoModule.cs
- QilValidationVisitor.cs
- GridViewDeleteEventArgs.cs
- OrderedDictionary.cs
- DependencyObjectPropertyDescriptor.cs
- IdentitySection.cs
- MenuEventArgs.cs
- ProjectionCamera.cs
- VariableQuery.cs
- TemplateNameScope.cs
- CustomValidator.cs
- StreamInfo.cs
- ProfessionalColorTable.cs
- Figure.cs
- ping.cs
- InfoCardCryptoHelper.cs
- XmlNavigatorStack.cs
- LineInfo.cs
- DataGridItemEventArgs.cs
- SatelliteContractVersionAttribute.cs
- DiscoveryDocument.cs
- FontStretches.cs
- TemplatedMailWebEventProvider.cs
- XmlObjectSerializerReadContext.cs
- UnitControl.cs
- TypeInitializationException.cs
- SortableBindingList.cs
- EdmFunctionAttribute.cs
- CalendarDataBindingHandler.cs
- TreeViewAutomationPeer.cs
- ToolStripPanelSelectionGlyph.cs
- RankException.cs
- ListItemCollection.cs
- XmlElementAttribute.cs
- SectionRecord.cs
- ToolStripMenuItemCodeDomSerializer.cs
- Thumb.cs
- WindowsProgressbar.cs
- XmlAttributes.cs
- Bidi.cs
- DataGridItem.cs
- DataRowView.cs
- DBNull.cs
- ProcessHostMapPath.cs