/// <summary>
/// Reporting a key was pressed.
/// </summary>
protected override void OnKeyDown(KeyEventArgs e)
{
if ((Keyboard.Modifiers & ModifierKeys.Alt) == ModifierKeys.Alt && (e.Key == Key.Left || e.Key == Key.Right))
{
DataGridLength updatedWidth = new DataGridLength();
if (e.Key == Key.Right)
{
updatedWidth = new DataGridLength(this.Column.ActualWidth + ColumnWidthStepSize);
}
else if (e.Key == Key.Left)
{
updatedWidth = new DataGridLength(this.Column.ActualWidth - ColumnWidthStepSize);
}
if (Column.CanColumnResize(updatedWidth))
{
this.Column.SetCurrentValue(DataGridColumn.WidthProperty, updatedWidth);
}
e.Handled = true;
return;
}
SendInputToColumn(e);
}
/// <summary>
/// Attempts to convert a DataGridLength instance to the given type.
/// </summary>
/// <param name="context">The ITypeDescriptorContext for this call.</param>
/// <param name="culture">The CultureInfo which is respected when converting.</param>
/// <param name="value">The DataGridLength to convert.</param>
/// <param name="destinationType">The type to which to convert the DataGridLength instance.</param>
/// <returns>
/// The object which was constructed.
/// </returns>
/// <exception cref="ArgumentNullException">
/// An ArgumentNullException is thrown if the value is null.
/// </exception>
/// <exception cref="ArgumentException">
/// An ArgumentException is thrown if the value is not null and is not a DataGridLength,
/// or if the destinationType isn't one of the valid destination types.
/// </exception>
public override object ConvertTo(
ITypeDescriptorContext context,
CultureInfo culture,
object value,
Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("destinationType");
}
if ((value != null) && (value is DataGridLength))
{
DataGridLength length = (DataGridLength)value;
if (destinationType == typeof(string))
{
return(ConvertToString(length, culture));
}
if (destinationType == typeof(InstanceDescriptor))
{
ConstructorInfo ci = typeof(DataGridLength).GetConstructor(new Type[] { typeof(double), typeof(DataGridLengthUnitType) });
return(new InstanceDescriptor(ci, new object[] { length.Value, length.UnitType }));
}
}
// The default exception to throw from ConvertTo
throw GetConvertToException(value, destinationType);
}
// Token: 0x060048D3 RID: 18643 RVA: 0x0014A864 File Offset: 0x00148A64
public static void OnColumnWidthChanged(IProvideDataGridColumn cell, DependencyPropertyChangedEventArgs e)
{
UIElement uielement = (UIElement)cell;
DataGridColumn column = cell.Column;
bool flag = cell is DataGridColumnHeader;
if (column != null)
{
DataGridLength width = column.Width;
if (width.IsAuto || (!flag && width.IsSizeToCells) || (flag && width.IsSizeToHeader))
{
DataGridLength dataGridLength = (DataGridLength)e.OldValue;
double num;
if (dataGridLength.UnitType != width.UnitType)
{
double constraintWidth = column.GetConstraintWidth(flag);
if (!DoubleUtil.AreClose(uielement.DesiredSize.Width, constraintWidth))
{
uielement.InvalidateMeasure();
uielement.Measure(new Size(constraintWidth, double.PositiveInfinity));
}
num = uielement.DesiredSize.Width;
}
else
{
num = dataGridLength.DesiredValue;
}
if (DoubleUtil.IsNaN(width.DesiredValue) || DoubleUtil.LessThan(width.DesiredValue, num))
{
column.SetWidthInternal(new DataGridLength(width.Value, width.UnitType, num, width.DisplayValue));
}
}
}
}
/// <summary>
/// Coerces a DataGridLength to a valid value. If any value components are double.NaN, this method
/// coerces them to a proper initial value. For star columns, the desired width is calculated based
/// on the rest of the star columns. For pixel widths, the desired value is based on the pixel value.
/// For auto widths, the desired value is initialized as the column's minimum width.
/// </summary>
/// <param name="width">The DataGridLength to coerce.</param>
/// <returns>The resultant (coerced) DataGridLength.</returns>
internal DataGridLength CoerceWidth(DataGridLength width)
{
double desiredValue = width.DesiredValue;
if (double.IsNaN(desiredValue))
{
if (width.IsStar && this.OwningGrid != null && this.OwningGrid.ColumnsInternal != null)
{
double totalStarValues = 0;
double totalStarDesiredValues = 0;
double totalNonStarDisplayWidths = 0;
foreach (DataGridColumn column in this.OwningGrid.ColumnsInternal.GetDisplayedColumns(c => c.IsVisible && c != this && !double.IsNaN(c.Width.DesiredValue)))
{
if (column.Width.IsStar)
{
totalStarValues += column.Width.Value;
totalStarDesiredValues += column.Width.DesiredValue;
}
else
{
totalNonStarDisplayWidths += column.ActualWidth;
}
}
if (totalStarValues == 0)
{
// Compute the new star column's desired value based on the available space if there are no other visible star columns
desiredValue = Math.Max(this.ActualMinWidth, this.OwningGrid.CellsWidth - totalNonStarDisplayWidths);
}
else
{
// Otherwise, compute its desired value based on those of other visible star columns
desiredValue = totalStarDesiredValues * width.Value / totalStarValues;
}
}
else if (width.IsAbsolute)
{
desiredValue = width.Value;
}
else
{
desiredValue = this.ActualMinWidth;
}
}
double displayValue = width.DisplayValue;
if (double.IsNaN(displayValue))
{
displayValue = desiredValue;
}
displayValue = Math.Max(this.ActualMinWidth, Math.Min(this.ActualMaxWidth, displayValue));
return(new DataGridLength(width.Value, width.UnitType, desiredValue, displayValue));
}
/// <summary>
/// Set the column's Width without breaking inheritance.
/// </summary>
/// <param name="width">The new Width.</param>
internal void SetWidthInternal(DataGridLength width)
{
bool originalValue = _settingWidthInternally;
_settingWidthInternally = true;
try
{
this.Width = width;
}
finally
{
_settingWidthInternally = originalValue;
}
}
/// <summary>
/// Converts a DataGridLength instance to a String given the CultureInfo.
/// </summary>
/// <param name="gl">DataGridLength instance to convert.</param>
/// <param name="cultureInfo">The culture to use.</param>
/// <returns>String representation of the object.</returns>
internal static string ConvertToString(DataGridLength length, CultureInfo cultureInfo)
{
switch (length.UnitType)
{
case DataGridLengthUnitType.Auto:
case DataGridLengthUnitType.SizeToCells:
case DataGridLengthUnitType.SizeToHeader:
return(length.UnitType.ToString());
// Star has one special case when value is "1.0" in which the value can be dropped.
case DataGridLengthUnitType.Star:
return(DoubleUtil.IsOne(length.Value) ? "*" : Convert.ToString(length.Value, cultureInfo) + "*");
// Print out the numeric value. "px" can be omitted.
default:
return(Convert.ToString(length.Value, cultureInfo));
}
}
// Token: 0x06004920 RID: 18720 RVA: 0x0014B824 File Offset: 0x00149A24
internal static string ConvertToString(DataGridLength length, CultureInfo cultureInfo)
{
switch (length.UnitType)
{
case DataGridLengthUnitType.Auto:
case DataGridLengthUnitType.SizeToCells:
case DataGridLengthUnitType.SizeToHeader:
return(length.UnitType.ToString());
case DataGridLengthUnitType.Star:
if (!DoubleUtil.IsOne(length.Value))
{
return(Convert.ToString(length.Value, cultureInfo) + "*");
}
return("*");
}
return(Convert.ToString(length.Value, cultureInfo));
}
/// <summary>
/// Invalidates a cell's panel if its column's width changes sufficiently.
/// </summary>
/// <param name="cell">The cell or header.</param>
/// <param name="e"></param>
public static void OnColumnWidthChanged(IProvideDataGridColumn cell, DependencyPropertyChangedEventArgs e)
{
Debug.Assert((cell is DataGridCell) || (cell is DataGridColumnHeader), "provideColumn should be one of the cell or header containers.");
UIElement element = (UIElement)cell;
DataGridColumn column = cell.Column;
bool isColumnHeader = (cell is DataGridColumnHeader);
if (column != null)
{
// determine the desired value of width for auto kind columns
DataGridLength width = column.Width;
if (width.IsAuto ||
(!isColumnHeader && width.IsSizeToCells) ||
(isColumnHeader && width.IsSizeToHeader))
{
DataGridLength oldWidth = (DataGridLength)e.OldValue;
double desiredWidth = 0.0;
if (oldWidth.UnitType != width.UnitType)
{
double constraintWidth = column.GetConstraintWidth(isColumnHeader);
if (!DoubleUtil.AreClose(element.DesiredSize.Width, constraintWidth))
{
element.InvalidateMeasure();
element.Measure(new Size(constraintWidth, double.PositiveInfinity));
}
desiredWidth = element.DesiredSize.Width;
}
else
{
desiredWidth = oldWidth.DesiredValue;
}
if (DoubleUtil.IsNaN(width.DesiredValue) ||
DoubleUtil.LessThan(width.DesiredValue, desiredWidth))
{
column.SetWidthInternal(new DataGridLength(width.Value, width.UnitType, desiredWidth, width.DisplayValue));
}
}
}
}
/// <summary>
/// Sets the column's Width directly, without any callback effects.
/// </summary>
/// <param name="width">The new Width.</param>
internal void SetWidthInternalNoCallback(DataGridLength width)
{
_width = width;
}
/// <summary>
/// Attempts to resize the column's width to the desired DisplayValue, but limits the final size
/// to the column's minimum and maximum values. If star sizing is being used, then the column
/// can only decrease in size by the amount that the columns after it can increase in size.
/// Likewise, the column can only increase in size if other columns can spare the width.
/// </summary>
/// <param name="value">The new Value.</param>
/// <param name="unitType">The new UnitType.</param>
/// <param name="desiredValue">The new DesiredValue.</param>
/// <param name="displayValue">The new DisplayValue.</param>
/// <param name="userInitiated">Whether or not this resize was initiated by a user action.</param>
internal void Resize(double value, DataGridLengthUnitType unitType, double desiredValue, double displayValue, bool userInitiated)
{
Debug.Assert(this.OwningGrid != null);
double newValue = value;
double newDesiredValue = desiredValue;
double newDisplayValue = Math.Max(this.ActualMinWidth, Math.Min(this.ActualMaxWidth, displayValue));
DataGridLengthUnitType newUnitType = unitType;
int starColumnsCount = 0;
double totalDisplayWidth = 0;
foreach (DataGridColumn column in this.OwningGrid.ColumnsInternal.GetVisibleColumns())
{
column.EnsureWidth();
totalDisplayWidth += column.ActualWidth;
starColumnsCount += (column != this && column.Width.IsStar) ? 1 : 0;
}
bool hasInfiniteAvailableWidth = !this.OwningGrid.RowsPresenterAvailableSize.HasValue || double.IsPositiveInfinity(this.OwningGrid.RowsPresenterAvailableSize.Value.Width);
// If we're using star sizing, we can only resize the column as much as the columns to the
// right will allow (i.e. until they hit their max or min widths).
if (!hasInfiniteAvailableWidth && (starColumnsCount > 0 || (unitType == DataGridLengthUnitType.Star && this.Width.IsStar && userInitiated)))
{
double limitedDisplayValue = this.Width.DisplayValue;
double availableIncrease = Math.Max(0, this.OwningGrid.CellsWidth - totalDisplayWidth);
double desiredChange = newDisplayValue - this.Width.DisplayValue;
if (desiredChange > availableIncrease)
{
// The desired change is greater than the amount of available space,
// so we need to decrease the widths of columns to the right to make room.
desiredChange -= availableIncrease;
double actualChange = desiredChange + this.OwningGrid.DecreaseColumnWidths(this.DisplayIndex + 1, -desiredChange, userInitiated);
limitedDisplayValue += availableIncrease + actualChange;
}
else if (desiredChange > 0)
{
// The desired change is positive but less than the amount of available space,
// so there's no need to decrease the widths of columns to the right.
limitedDisplayValue += desiredChange;
}
else
{
// The desired change is negative, so we need to increase the widths of columns to the right.
limitedDisplayValue += desiredChange + this.OwningGrid.IncreaseColumnWidths(this.DisplayIndex + 1, -desiredChange, userInitiated);
}
if (this.ActualCanUserResize || (this.Width.IsStar && !userInitiated))
{
newDisplayValue = limitedDisplayValue;
}
}
if (userInitiated)
{
newDesiredValue = newDisplayValue;
if (!this.Width.IsStar)
{
this.InheritsWidth = false;
newValue = newDisplayValue;
newUnitType = DataGridLengthUnitType.Pixel;
}
else if (starColumnsCount > 0 && !hasInfiniteAvailableWidth)
{
// Recalculate star weight of this column based on the new desired value
this.InheritsWidth = false;
newValue = (this.Width.Value * newDisplayValue) / this.ActualWidth;
}
}
DataGridLength oldWidth = this.Width;
SetWidthInternalNoCallback(new DataGridLength(Math.Min(double.MaxValue, newValue), newUnitType, newDesiredValue, newDisplayValue));
if (this.Width != oldWidth)
{
this.OwningGrid.OnColumnWidthChanged(this);
}
}