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CC-Functions/Misc/DataGridViewNumericUpDownCell.cs

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C#
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using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace GradeCalc
{
public class DataGridViewNumericUpDownCell : DataGridViewTextBoxCell
{
// Used in KeyEntersEditMode function
[DllImport("USER32.DLL", CharSet = CharSet.Auto)]
private static extern short VkKeyScan(char key);
// Used in TranslateAlignment function
private static readonly DataGridViewContentAlignment anyRight = DataGridViewContentAlignment.TopRight |
DataGridViewContentAlignment.MiddleRight |
DataGridViewContentAlignment.BottomRight;
private static readonly DataGridViewContentAlignment anyCenter = DataGridViewContentAlignment.TopCenter |
DataGridViewContentAlignment.MiddleCenter |
DataGridViewContentAlignment.BottomCenter;
// Default dimensions of the static rendering bitmap used for the painting of the non-edited cells
private const int DATAGRIDVIEWNUMERICUPDOWNCELL_defaultRenderingBitmapWidth = 100;
private const int DATAGRIDVIEWNUMERICUPDOWNCELL_defaultRenderingBitmapHeight = 22;
// Default value of the DecimalPlaces property
internal const int DATAGRIDVIEWNUMERICUPDOWNCELL_defaultDecimalPlaces = 0;
// Default value of the Increment property
internal const decimal DATAGRIDVIEWNUMERICUPDOWNCELL_defaultIncrement = decimal.One;
// Default value of the Maximum property
internal const decimal DATAGRIDVIEWNUMERICUPDOWNCELL_defaultMaximum = (decimal)100.0;
// Default value of the Minimum property
internal const decimal DATAGRIDVIEWNUMERICUPDOWNCELL_defaultMinimum = decimal.Zero;
// Default value of the ThousandsSeparator property
internal const bool DATAGRIDVIEWNUMERICUPDOWNCELL_defaultThousandsSeparator = false;
// Type of this cell's editing control
private static Type defaultEditType = typeof(DataGridViewNumericUpDownEditingControl);
// Type of this cell's value. The formatted value type is string, the same as the base class DataGridViewTextBoxCell
private static Type defaultValueType = typeof(decimal);
// The bitmap used to paint the non-edited cells via a call to NumericUpDown.DrawToBitmap
[ThreadStatic]
private static Bitmap renderingBitmap;
// The NumericUpDown control used to paint the non-edited cells via a call to NumericUpDown.DrawToBitmap
[ThreadStatic]
private static NumericUpDown paintingNumericUpDown;
private int decimalPlaces; // Caches the value of the DecimalPlaces property
private decimal increment; // Caches the value of the Increment property
private decimal minimum; // Caches the value of the Minimum property
private decimal maximum; // Caches the value of the Maximum property
private bool thousandsSeparator; // Caches the value of the ThousandsSeparator property
/// <summary>
/// Constructor for the DataGridViewNumericUpDownCell cell type
/// </summary>
public DataGridViewNumericUpDownCell()
{
// Create a thread specific bitmap used for the painting of the non-edited cells
if (renderingBitmap == null)
{
renderingBitmap = new Bitmap(DATAGRIDVIEWNUMERICUPDOWNCELL_defaultRenderingBitmapWidth, DATAGRIDVIEWNUMERICUPDOWNCELL_defaultRenderingBitmapHeight);
}
// Create a thread specific NumericUpDown control used for the painting of the non-edited cells
if (paintingNumericUpDown == null)
{
paintingNumericUpDown = new NumericUpDown();
// Some properties only need to be set once for the lifetime of the control:
paintingNumericUpDown.BorderStyle = BorderStyle.None;
paintingNumericUpDown.Maximum = decimal.MaxValue / 10;
paintingNumericUpDown.Minimum = decimal.MinValue / 10;
}
// Set the default values of the properties:
decimalPlaces = DATAGRIDVIEWNUMERICUPDOWNCELL_defaultDecimalPlaces;
increment = DATAGRIDVIEWNUMERICUPDOWNCELL_defaultIncrement;
minimum = DATAGRIDVIEWNUMERICUPDOWNCELL_defaultMinimum;
maximum = DATAGRIDVIEWNUMERICUPDOWNCELL_defaultMaximum;
thousandsSeparator = DATAGRIDVIEWNUMERICUPDOWNCELL_defaultThousandsSeparator;
}
/// <summary>
/// The DecimalPlaces property replicates the one from the NumericUpDown control
/// </summary>
[
DefaultValue(DATAGRIDVIEWNUMERICUPDOWNCELL_defaultDecimalPlaces)
]
public int DecimalPlaces
{
get {
return decimalPlaces;
}
set {
if (value < 0 || value > 99)
{
throw new ArgumentOutOfRangeException("The DecimalPlaces property cannot be smaller than 0 or larger than 99.");
}
if (decimalPlaces != value)
{
SetDecimalPlaces(RowIndex, value);
OnCommonChange(); // Assure that the cell or column gets repainted and autosized if needed
}
}
}
/// <summary>
/// Returns the current DataGridView EditingControl as a DataGridViewNumericUpDownEditingControl control
/// </summary>
private DataGridViewNumericUpDownEditingControl EditingNumericUpDown
{
get {
return DataGridView.EditingControl as DataGridViewNumericUpDownEditingControl;
}
}
/// <summary>
/// Define the type of the cell's editing control
/// </summary>
public override Type EditType
{
get {
return defaultEditType; // the type is DataGridViewNumericUpDownEditingControl
}
}
/// <summary>
/// The Increment property replicates the one from the NumericUpDown control
/// </summary>
public decimal Increment
{
get {
return increment;
}
set {
if (value < (decimal)0.0)
{
throw new ArgumentOutOfRangeException("The Increment property cannot be smaller than 0.");
}
SetIncrement(RowIndex, value);
// No call to OnCommonChange is needed since the increment value does not affect the rendering of the cell.
}
}
/// <summary>
/// The Maximum property replicates the one from the NumericUpDown control
/// </summary>
public decimal Maximum
{
get {
return maximum;
}
set {
if (maximum != value)
{
SetMaximum(RowIndex, value);
OnCommonChange();
}
}
}
/// <summary>
/// The Minimum property replicates the one from the NumericUpDown control
/// </summary>
public decimal Minimum
{
get {
return minimum;
}
set {
if (minimum != value)
{
SetMinimum(RowIndex, value);
OnCommonChange();
}
}
}
/// <summary>
/// The ThousandsSeparator property replicates the one from the NumericUpDown control
/// </summary>
[
DefaultValue(DATAGRIDVIEWNUMERICUPDOWNCELL_defaultThousandsSeparator)
]
public bool ThousandsSeparator
{
get {
return thousandsSeparator;
}
set {
if (thousandsSeparator != value)
{
SetThousandsSeparator(RowIndex, value);
OnCommonChange();
}
}
}
/// <summary>
/// Returns the type of the cell's Value property
/// </summary>
public override Type ValueType
{
get {
Type valueType = base.ValueType;
if (valueType != null)
{
return valueType;
}
return defaultValueType;
}
}
/// <summary>
/// Clones a DataGridViewNumericUpDownCell cell, copies all the custom properties.
/// </summary>
public override object Clone()
{
DataGridViewNumericUpDownCell dataGridViewCell = base.Clone() as DataGridViewNumericUpDownCell;
if (dataGridViewCell != null)
{
dataGridViewCell.DecimalPlaces = DecimalPlaces;
dataGridViewCell.Increment = Increment;
dataGridViewCell.Maximum = Maximum;
dataGridViewCell.Minimum = Minimum;
dataGridViewCell.ThousandsSeparator = ThousandsSeparator;
}
return dataGridViewCell;
}
/// <summary>
/// Returns the provided value constrained to be within the min and max.
/// </summary>
private decimal Constrain(decimal value)
{
Debug.Assert(minimum <= maximum);
if (value < minimum)
{
value = minimum;
}
if (value > maximum)
{
value = maximum;
}
return value;
}
/// <summary>
/// DetachEditingControl gets called by the DataGridView control when the editing session is ending
/// </summary>
[
EditorBrowsable(EditorBrowsableState.Advanced)
]
public override void DetachEditingControl()
{
DataGridView dataGridView = DataGridView;
if (dataGridView == null || dataGridView.EditingControl == null)
{
throw new InvalidOperationException("Cell is detached or its grid has no editing control.");
}
NumericUpDown numericUpDown = dataGridView.EditingControl as NumericUpDown;
if (numericUpDown != null)
{
// Editing controls get recycled. Indeed, when a DataGridViewNumericUpDownCell cell gets edited
// after another DataGridViewNumericUpDownCell cell, the same editing control gets reused for
// performance reasons (to avoid an unnecessary control destruction and creation).
// Here the undo buffer of the TextBox inside the NumericUpDown control gets cleared to avoid
// interferences between the editing sessions.
TextBox textBox = numericUpDown.Controls[1] as TextBox;
if (textBox != null)
{
textBox.ClearUndo();
}
}
base.DetachEditingControl();
}
/// <summary>
/// Adjusts the location and size of the editing control given the alignment characteristics of the cell
/// </summary>
private Rectangle GetAdjustedEditingControlBounds(Rectangle editingControlBounds, DataGridViewCellStyle cellStyle)
{
// Add a 1 pixel padding on the left and right of the editing control
editingControlBounds.X += 1;
editingControlBounds.Width = Math.Max(0, editingControlBounds.Width - 2);
// Adjust the vertical location of the editing control:
int preferredHeight = cellStyle.Font.Height + 3;
if (preferredHeight < editingControlBounds.Height)
{
switch (cellStyle.Alignment)
{
case DataGridViewContentAlignment.MiddleLeft:
case DataGridViewContentAlignment.MiddleCenter:
case DataGridViewContentAlignment.MiddleRight:
editingControlBounds.Y += (editingControlBounds.Height - preferredHeight) / 2;
break;
case DataGridViewContentAlignment.BottomLeft:
case DataGridViewContentAlignment.BottomCenter:
case DataGridViewContentAlignment.BottomRight:
editingControlBounds.Y += editingControlBounds.Height - preferredHeight;
break;
}
}
return editingControlBounds;
}
/// <summary>
/// Customized implementation of the GetErrorIconBounds function in order to draw the potential
/// error icon next to the up/down buttons and not on top of them.
/// </summary>
protected override Rectangle GetErrorIconBounds(Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex)
{
const int ButtonsWidth = 16;
Rectangle errorIconBounds = base.GetErrorIconBounds(graphics, cellStyle, rowIndex);
if (DataGridView.RightToLeft == RightToLeft.Yes)
{
errorIconBounds.X = errorIconBounds.Left + ButtonsWidth;
}
else
{
errorIconBounds.X = errorIconBounds.Left - ButtonsWidth;
}
return errorIconBounds;
}
/// <summary>
/// Customized implementation of the GetFormattedValue function in order to include the decimal and thousand separator
/// characters in the formatted representation of the cell value.
/// </summary>
protected override object GetFormattedValue(object value,
int rowIndex,
ref DataGridViewCellStyle cellStyle,
TypeConverter valueTypeConverter,
TypeConverter formattedValueTypeConverter,
DataGridViewDataErrorContexts context)
{
// By default, the base implementation converts the Decimal 1234.5 into the string "1234.5"
object formattedValue = base.GetFormattedValue(value, rowIndex, ref cellStyle, valueTypeConverter, formattedValueTypeConverter, context);
string formattedNumber = formattedValue as string;
if (!string.IsNullOrEmpty(formattedNumber) && value != null)
{
decimal unformattedDecimal = Convert.ToDecimal(value);
decimal formattedDecimal = Convert.ToDecimal(formattedNumber);
if (unformattedDecimal == formattedDecimal)
{
// The base implementation of GetFormattedValue (which triggers the CellFormatting event) did nothing else than
// the typical 1234.5 to "1234.5" conversion. But depending on the values of ThousandsSeparator and DecimalPlaces,
// this may not be the actual string displayed. The real formatted value may be "1,234.500"
return formattedDecimal.ToString((ThousandsSeparator ? "N" : "F") + DecimalPlaces.ToString());
}
}
return formattedValue;
}
/// <summary>
/// Custom implementation of the GetPreferredSize function. This implementation uses the preferred size of the base
/// DataGridViewTextBoxCell cell and adds room for the up/down buttons.
/// </summary>
protected override Size GetPreferredSize(Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex, Size constraintSize)
{
if (DataGridView == null)
{
return new Size(-1, -1);
}
Size preferredSize = base.GetPreferredSize(graphics, cellStyle, rowIndex, constraintSize);
if (constraintSize.Width == 0)
{
const int ButtonsWidth = 16; // Account for the width of the up/down buttons.
const int ButtonMargin = 8; // Account for some blank pixels between the text and buttons.
preferredSize.Width += ButtonsWidth + ButtonMargin;
}
return preferredSize;
}
/// <summary>
/// Custom implementation of the InitializeEditingControl function. This function is called by the DataGridView control
/// at the beginning of an editing session. It makes sure that the properties of the NumericUpDown editing control are
/// set according to the cell properties.
/// </summary>
public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
{
base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle);
NumericUpDown numericUpDown = DataGridView.EditingControl as NumericUpDown;
if (numericUpDown != null)
{
numericUpDown.BorderStyle = BorderStyle.None;
numericUpDown.DecimalPlaces = DecimalPlaces;
numericUpDown.Increment = Increment;
numericUpDown.Maximum = Maximum;
numericUpDown.Minimum = Minimum;
numericUpDown.ThousandsSeparator = ThousandsSeparator;
string initialFormattedValueStr = initialFormattedValue as string;
if (initialFormattedValueStr == null)
{
numericUpDown.Text = string.Empty;
}
else
{
numericUpDown.Text = initialFormattedValueStr;
}
}
}
/// <summary>
/// Custom implementation of the KeyEntersEditMode function. This function is called by the DataGridView control
/// to decide whether a keystroke must start an editing session or not. In this case, a new session is started when
/// a digit or negative sign key is hit.
/// </summary>
public override bool KeyEntersEditMode(KeyEventArgs e)
{
NumberFormatInfo numberFormatInfo = CultureInfo.CurrentCulture.NumberFormat;
Keys negativeSignKey = Keys.None;
string negativeSignStr = numberFormatInfo.NegativeSign;
if (!string.IsNullOrEmpty(negativeSignStr) && negativeSignStr.Length == 1)
{
negativeSignKey = (Keys)VkKeyScan(negativeSignStr[0]);
}
if ((char.IsDigit((char)e.KeyCode) ||
e.KeyCode >= Keys.NumPad0 && e.KeyCode <= Keys.NumPad9 ||
negativeSignKey == e.KeyCode ||
Keys.Subtract == e.KeyCode) &&
!e.Shift && !e.Alt && !e.Control)
{
return true;
}
return false;
}
/// <summary>
/// Called when a cell characteristic that affects its rendering and/or preferred size has changed.
/// This implementation only takes care of repainting the cells. The DataGridView's autosizing methods
/// also need to be called in cases where some grid elements autosize.
/// </summary>
private void OnCommonChange()
{
if (DataGridView != null && !DataGridView.IsDisposed && !DataGridView.Disposing)
{
if (RowIndex == -1)
{
// Invalidate and autosize column
DataGridView.InvalidateColumn(ColumnIndex);
// TODO: Add code to autosize the cell's column, the rows, the column headers
// and the row headers depending on their autosize settings.
// The DataGridView control does not expose a public method that takes care of this.
}
else
{
// The DataGridView control exposes a public method called UpdateCellValue
// that invalidates the cell so that it gets repainted and also triggers all
// the necessary autosizing: the cell's column and/or row, the column headers
// and the row headers are autosized depending on their autosize settings.
DataGridView.UpdateCellValue(ColumnIndex, RowIndex);
}
}
}
/// <summary>
/// Determines whether this cell, at the given row index, shows the grid's editing control or not.
/// The row index needs to be provided as a parameter because this cell may be shared among multiple rows.
/// </summary>
private bool OwnsEditingNumericUpDown(int rowIndex)
{
if (rowIndex == -1 || DataGridView == null)
{
return false;
}
DataGridViewNumericUpDownEditingControl numericUpDownEditingControl = DataGridView.EditingControl as DataGridViewNumericUpDownEditingControl;
return numericUpDownEditingControl != null && rowIndex == ((IDataGridViewEditingControl)numericUpDownEditingControl).EditingControlRowIndex;
}
/// <summary>
/// Custom paints the cell. The base implementation of the DataGridViewTextBoxCell type is called first,
/// dropping the icon error and content foreground parts. Those two parts are painted by this custom implementation.
/// In this sample, the non-edited NumericUpDown control is painted by using a call to Control.DrawToBitmap. This is
/// an easy solution for painting controls but it's not necessarily the most performant. An alternative would be to paint
/// the NumericUpDown control piece by piece (text and up/down buttons).
/// </summary>
protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState,
object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
{
if (DataGridView == null)
{
return;
}
// First paint the borders and background of the cell.
base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle,
paintParts & ~(DataGridViewPaintParts.ErrorIcon | DataGridViewPaintParts.ContentForeground));
Point ptCurrentCell = DataGridView.CurrentCellAddress;
bool cellCurrent = ptCurrentCell.X == ColumnIndex && ptCurrentCell.Y == rowIndex;
bool cellEdited = cellCurrent && DataGridView.EditingControl != null;
// If the cell is in editing mode, there is nothing else to paint
if (!cellEdited)
{
if (PartPainted(paintParts, DataGridViewPaintParts.ContentForeground))
{
// Paint a NumericUpDown control
// Take the borders into account
Rectangle borderWidths = BorderWidths(advancedBorderStyle);
Rectangle valBounds = cellBounds;
valBounds.Offset(borderWidths.X, borderWidths.Y);
valBounds.Width -= borderWidths.Right;
valBounds.Height -= borderWidths.Bottom;
// Also take the padding into account
if (cellStyle.Padding != Padding.Empty)
{
if (DataGridView.RightToLeft == RightToLeft.Yes)
{
valBounds.Offset(cellStyle.Padding.Right, cellStyle.Padding.Top);
}
else
{
valBounds.Offset(cellStyle.Padding.Left, cellStyle.Padding.Top);
}
valBounds.Width -= cellStyle.Padding.Horizontal;
valBounds.Height -= cellStyle.Padding.Vertical;
}
// Determine the NumericUpDown control location
valBounds = GetAdjustedEditingControlBounds(valBounds, cellStyle);
bool cellSelected = (cellState & DataGridViewElementStates.Selected) != 0;
if (renderingBitmap.Width < valBounds.Width ||
renderingBitmap.Height < valBounds.Height)
{
// The static bitmap is too small, a bigger one needs to be allocated.
renderingBitmap.Dispose();
renderingBitmap = new Bitmap(valBounds.Width, valBounds.Height);
}
// Make sure the NumericUpDown control is parented to a visible control
if (paintingNumericUpDown.Parent == null || !paintingNumericUpDown.Parent.Visible)
{
paintingNumericUpDown.Parent = DataGridView;
}
// Set all the relevant properties
paintingNumericUpDown.TextAlign = TranslateAlignment(cellStyle.Alignment);
paintingNumericUpDown.DecimalPlaces = DecimalPlaces;
paintingNumericUpDown.ThousandsSeparator = ThousandsSeparator;
paintingNumericUpDown.Font = cellStyle.Font;
paintingNumericUpDown.Width = valBounds.Width;
paintingNumericUpDown.Height = valBounds.Height;
paintingNumericUpDown.RightToLeft = DataGridView.RightToLeft;
paintingNumericUpDown.Location = new Point(0, -paintingNumericUpDown.Height - 100);
paintingNumericUpDown.Text = formattedValue as string;
Color backColor;
if (PartPainted(paintParts, DataGridViewPaintParts.SelectionBackground) && cellSelected)
{
backColor = cellStyle.SelectionBackColor;
}
else
{
backColor = cellStyle.BackColor;
}
if (PartPainted(paintParts, DataGridViewPaintParts.Background))
{
if (backColor.A < 255)
{
// The NumericUpDown control does not support transparent back colors
backColor = Color.FromArgb(255, backColor);
}
paintingNumericUpDown.BackColor = backColor;
}
// Finally paint the NumericUpDown control
Rectangle srcRect = new Rectangle(0, 0, valBounds.Width, valBounds.Height);
if (srcRect.Width > 0 && srcRect.Height > 0)
{
paintingNumericUpDown.DrawToBitmap(renderingBitmap, srcRect);
graphics.DrawImage(renderingBitmap, new Rectangle(valBounds.Location, valBounds.Size),
srcRect, GraphicsUnit.Pixel);
}
}
if (PartPainted(paintParts, DataGridViewPaintParts.ErrorIcon))
{
// Paint the potential error icon on top of the NumericUpDown control
base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText,
cellStyle, advancedBorderStyle, DataGridViewPaintParts.ErrorIcon);
}
}
}
/// <summary>
/// Little utility function called by the Paint function to see if a particular part needs to be painted.
/// </summary>
private static bool PartPainted(DataGridViewPaintParts paintParts, DataGridViewPaintParts paintPart)
{
return (paintParts & paintPart) != 0;
}
/// <summary>
/// Custom implementation of the PositionEditingControl method called by the DataGridView control when it
/// needs to relocate and/or resize the editing control.
/// </summary>
public override void PositionEditingControl(bool setLocation,
bool setSize,
Rectangle cellBounds,
Rectangle cellClip,
DataGridViewCellStyle cellStyle,
bool singleVerticalBorderAdded,
bool singleHorizontalBorderAdded,
bool isFirstDisplayedColumn,
bool isFirstDisplayedRow)
{
Rectangle editingControlBounds = PositionEditingPanel(cellBounds,
cellClip,
cellStyle,
singleVerticalBorderAdded,
singleHorizontalBorderAdded,
isFirstDisplayedColumn,
isFirstDisplayedRow);
editingControlBounds = GetAdjustedEditingControlBounds(editingControlBounds, cellStyle);
DataGridView.EditingControl.Location = new Point(editingControlBounds.X, editingControlBounds.Y);
DataGridView.EditingControl.Size = new Size(editingControlBounds.Width, editingControlBounds.Height);
}
/// <summary>
/// Utility function that sets a new value for the DecimalPlaces property of the cell. This function is used by
/// the cell and column DecimalPlaces property. The column uses this method instead of the DecimalPlaces
/// property for performance reasons. This way the column can invalidate the entire column at once instead of
/// invalidating each cell of the column individually. A row index needs to be provided as a parameter because
/// this cell may be shared among multiple rows.
/// </summary>
internal void SetDecimalPlaces(int rowIndex, int value)
{
Debug.Assert(value >= 0 && value <= 99);
decimalPlaces = value;
if (OwnsEditingNumericUpDown(rowIndex))
{
EditingNumericUpDown.DecimalPlaces = value;
}
}
/// Utility function that sets a new value for the Increment property of the cell. This function is used by
/// the cell and column Increment property. A row index needs to be provided as a parameter because
/// this cell may be shared among multiple rows.
internal void SetIncrement(int rowIndex, decimal value)
{
Debug.Assert(value >= (decimal)0.0);
increment = value;
if (OwnsEditingNumericUpDown(rowIndex))
{
EditingNumericUpDown.Increment = value;
}
}
/// Utility function that sets a new value for the Maximum property of the cell. This function is used by
/// the cell and column Maximum property. The column uses this method instead of the Maximum
/// property for performance reasons. This way the column can invalidate the entire column at once instead of
/// invalidating each cell of the column individually. A row index needs to be provided as a parameter because
/// this cell may be shared among multiple rows.
internal void SetMaximum(int rowIndex, decimal value)
{
maximum = value;
if (minimum > maximum)
{
minimum = maximum;
}
object cellValue = GetValue(rowIndex);
if (cellValue != null)
{
decimal currentValue = Convert.ToDecimal(cellValue);
decimal constrainedValue = Constrain(currentValue);
if (constrainedValue != currentValue)
{
SetValue(rowIndex, constrainedValue);
}
}
Debug.Assert(maximum == value);
if (OwnsEditingNumericUpDown(rowIndex))
{
EditingNumericUpDown.Maximum = value;
}
}
/// Utility function that sets a new value for the Minimum property of the cell. This function is used by
/// the cell and column Minimum property. The column uses this method instead of the Minimum
/// property for performance reasons. This way the column can invalidate the entire column at once instead of
/// invalidating each cell of the column individually. A row index needs to be provided as a parameter because
/// this cell may be shared among multiple rows.
internal void SetMinimum(int rowIndex, decimal value)
{
minimum = value;
if (minimum > maximum)
{
maximum = value;
}
object cellValue = GetValue(rowIndex);
if (cellValue != null)
{
decimal currentValue = Convert.ToDecimal(cellValue);
decimal constrainedValue = Constrain(currentValue);
if (constrainedValue != currentValue)
{
SetValue(rowIndex, constrainedValue);
}
}
Debug.Assert(minimum == value);
if (OwnsEditingNumericUpDown(rowIndex))
{
EditingNumericUpDown.Minimum = value;
}
}
/// Utility function that sets a new value for the ThousandsSeparator property of the cell. This function is used by
/// the cell and column ThousandsSeparator property. The column uses this method instead of the ThousandsSeparator
/// property for performance reasons. This way the column can invalidate the entire column at once instead of
/// invalidating each cell of the column individually. A row index needs to be provided as a parameter because
/// this cell may be shared among multiple rows.
internal void SetThousandsSeparator(int rowIndex, bool value)
{
thousandsSeparator = value;
if (OwnsEditingNumericUpDown(rowIndex))
{
EditingNumericUpDown.ThousandsSeparator = value;
}
}
/// <summary>
/// Returns a standard textual representation of the cell.
/// </summary>
public override string ToString()
{
return "DataGridViewNumericUpDownCell { ColumnIndex=" + ColumnIndex.ToString(CultureInfo.CurrentCulture) + ", RowIndex=" + RowIndex.ToString(CultureInfo.CurrentCulture) + " }";
}
/// <summary>
/// Little utility function used by both the cell and column types to translate a DataGridViewContentAlignment value into
/// a HorizontalAlignment value.
/// </summary>
internal static HorizontalAlignment TranslateAlignment(DataGridViewContentAlignment align)
{
if ((align & anyRight) != 0)
{
return HorizontalAlignment.Right;
}
else if ((align & anyCenter) != 0)
{
return HorizontalAlignment.Center;
}
else
{
return HorizontalAlignment.Left;
}
}
}
}