/// <summary>
/// Creates a GUI column from the given properties.
/// </summary>
/// <param name="pColumn">The column properties.</param>
/// <param name="pIndex">The column index.</param>
/// <returns>The created column.</returns>
public static ExtendedGridViewColumn CreateFrom(TreeListViewColumn pColumn, int pIndex)
{
ExtendedGridViewColumn lColumn = new ExtendedGridViewColumn();
// Header.
lColumn.Header = pColumn.Header;
// Width.
GridLength lWidth = new GridLength();
if (pColumn.Stretch)
{
lWidth = new GridLength(pColumn.Width, GridUnitType.Star);
}
else
{
lWidth = new GridLength(pColumn.Width, GridUnitType.Pixel);
}
lColumn.GridLength = lWidth;
// Template selector.
if (pColumn.TemplateSelector != null)
{
lColumn.CellTemplateSelector = pColumn.TemplateSelector;
}
else
{
// Template.
lColumn.CellTemplate = XTreeListView.Resources.All.Instance.GetCellTemplate(pColumn.DisplayMemberPath);
}
return(lColumn);
}
/// <summary>
/// Updates the grid view columns with the given collection.
/// </summary>
/// <param name="pCollection">The collection to synchronize.</param>
internal void SynchronizeColumns(TreeListViewColumnCollection pCollection)
{
// Clearing columns.
this.Columns.Clear();
for (int lIter = 0; lIter < pCollection.Count; lIter++)
{
// Creating a column for each backuped column.
ExtendedGridViewColumn lColumn = ExtendedGridViewColumn.CreateFrom(pCollection[lIter], lIter);
// Indenting the data template used in the first column.
if (lIter == 0)
{
// Extra margin between the end of the decorators part and the beginning of the item data template to remove.
double lExtraMargin = 4;
// Creating the indentation of the data template.
Binding lTemplateMarginBinding = new Binding("DecoratorWidth");
lTemplateMarginBinding.Converter = new WidthToLeftMarginConverter()
{
Margin = lExtraMargin
};
// Creating the new cell data template.
System.Windows.DataTemplate lCellDataTemplate = new System.Windows.DataTemplate();
// Defining the visual tree.
FrameworkElementFactory lCellFactory = new FrameworkElementFactory(typeof(ContentControl));
lCellFactory.SetBinding(ContentControl.MarginProperty, lTemplateMarginBinding);
lCellFactory.SetBinding(ContentControl.ContentProperty, new Binding()
{
BindsDirectlyToSource = true
});
// Trying to get the data template already defined in the first column.
if (lColumn.CellTemplate != null)
{
lCellFactory.SetValue(ContentControl.ContentTemplateProperty, lColumn.CellTemplate);
// Removing the template from the cell as it is now applied in the ContentControl.
lColumn.CellTemplate = null;
}
// Trying to get the data template selector if any.
if (lColumn.CellTemplateSelector != null)
{
lCellFactory.SetValue(ContentControl.ContentTemplateSelectorProperty, lColumn.CellTemplateSelector);
// Removing the template selector from the cell as it is now applied in the ContentControl.
lColumn.CellTemplateSelector = null;
}
// Trying to get the display path.
if (lColumn.DisplayMemberBinding != null)
{
lCellFactory.SetValue(ContentControl.ContentProperty, lColumn.DisplayMemberBinding);
// Removing the template selector from the cell as it is now applied in the ContentControl.
lColumn.DisplayMemberBinding = null;
}
// Updating the cell template.
lCellDataTemplate.VisualTree = lCellFactory;
lColumn.CellTemplate = lCellDataTemplate;
}
// Adding the column.
this.Columns.Add(lColumn);
// Notification.
if (this.Synchronized != null)
{
this.Synchronized();
}
}
}
/// <summary>
/// Computes the position of its children inside each child's Margin and calls Arrange on each child.
/// </summary>
/// <param name="pArrangeSize">Size the GridViewHeaderRowPresenter will assume.</param>
protected override Size ArrangeOverride(Size pArrangeSize)
{
GridViewColumnCollection columns = Columns;
double accumulatedWidth = 0.0;
double remainingWidth = pArrangeSize.Width;
Rect rect;
HeadersPositionList.Clear();
if (columns != null)
{
// Arrange working headers
for (int i = 0; i < columns.Count; ++i)
{
UIElement child = this.GetVisualChild(this.GetVisualIndex(i)) as UIElement;
if (child == null)
{
continue;
}
ExtendedGridViewColumn column = columns[i] as ExtendedGridViewColumn;
// has a given value or 'auto'
double childArrangeWidth = Math.Min(remainingWidth, ((column.State == ExtendedGridViewColumnMeasureState.SpecificWidth) ? column.Width : column.DesiredWidth));
// calculate the header rect
rect = new Rect(accumulatedWidth, 0.0, childArrangeWidth, pArrangeSize.Height);
// arrange header
child.Arrange(rect);
//Store rect in HeadersPositionList as i-th column position
HeadersPositionList.Add(rect);
remainingWidth -= childArrangeWidth;
accumulatedWidth += childArrangeWidth;
}
// check width to hide previous header's right half gripper, from the first working header to padding header
// only happens after column delete, insert, move
//if (_isColumnChangedOrCreated)
//{
// for (int i = 0; i < columns.Count; ++i)
// {
// GridViewColumnHeader header = children[GetVisualIndex(i)] as GridViewColumnHeader;
// header.CheckWidthForPreviousHeaderGripper();
// }
// _paddingHeader.CheckWidthForPreviousHeaderGripper();
// _isColumnChangedOrCreated = false;
//}
}
// Arrange padding header
Debug.Assert(this.PaddingHeader != null, "padding header is null");
rect = new Rect(accumulatedWidth, 0.0, Math.Max(remainingWidth, 0.0), pArrangeSize.Height);
this.PaddingHeader.Arrange(rect);
this.HeadersPositionList.Add(rect);
// if re-order started, arrange floating header & indicator
if (this.IsHeaderDragging)
{
this.FloatingHeader.Arrange(new Rect(new Point(this.DragCurrentPosition.X - this.DragRelativeStartPosition.X, 0), this.HeadersPositionList[this.DragStartColumnIndex].Size));
Point lPos = this.GetHeaderPositionByColumnIndex(this.DragDestColumnIndex);
this.DragIndicator.Arrange(new Rect(lPos, new Size(this.DragIndicator.DesiredSize.Width, pArrangeSize.Height)));
}
return(pArrangeSize);
}
/// <summary>
/// Override of <seealso cref="FrameworkElement.MeasureOverride" />.
/// </summary>
/// <param name="pConstraint">Constraint size is an "upper limit" that the return value should not exceed.</param>
/// <returns>The GridViewHeaderRowPresenter's desired size.</returns>
protected override Size MeasureOverride(Size pConstraint)
{
double lMaxHeight = 0.0;
double lAccumulatedWidth = 0.0;
double lConstraintHeight = pConstraint.Height;
bool lDesiredWidthListEnsured = false;
if (this.Columns != null)
{
// Measure working headers.
for (int i = 0; i < this.Columns.Count; ++i)
{
// Getting the column header visual element.
UIElement lColumnHeader = this.GetVisualChild(this.GetVisualIndex(i)) as UIElement;
if (lColumnHeader == null)
{
continue;
}
double lChildConstraintWidth = Math.Max(0.0, pConstraint.Width - lAccumulatedWidth);
ExtendedGridViewColumn lColumn = this.Columns[i] as ExtendedGridViewColumn;
if (lColumn.State == ExtendedGridViewColumnMeasureState.Init)
{
if (lDesiredWidthListEnsured == false)
{
this.EnsureDesiredWidthList();
this.LayoutUpdated += this.OnLayoutUpdated;
lDesiredWidthListEnsured = true;
}
lColumnHeader.Measure(new Size(lChildConstraintWidth, lConstraintHeight));
DesiredWidthList[lColumn.ActualIndex] = lColumn.EnsureDesiredWidth(lColumnHeader.DesiredSize.Width);
lAccumulatedWidth += lColumn.DesiredWidth;
}
else if (lColumn.State == ExtendedGridViewColumnMeasureState.Headered ||
lColumn.State == ExtendedGridViewColumnMeasureState.Data)
{
//ScrollViewer lParentScrolViewer = this.FindVisualParent<ScrollViewer>();
//if (lParentScrolViewer.ViewportWidth > 0.0)
//{
// lColumn.Width = lParentScrolViewer.ViewportWidth / DesiredWidthList.Count;
//}
lChildConstraintWidth = Math.Min(lChildConstraintWidth, lColumn.DesiredWidth);
lColumnHeader.Measure(new Size(lChildConstraintWidth, lConstraintHeight));
lAccumulatedWidth += lColumn.DesiredWidth;
}
else
{
// ColumnMeasureState.SpecificWidth.
lChildConstraintWidth = Math.Min(lChildConstraintWidth, lColumn.Width);
lColumnHeader.Measure(new Size(lChildConstraintWidth, lConstraintHeight));
lAccumulatedWidth += lColumn.Width;
}
lMaxHeight = Math.Max(lMaxHeight, lColumnHeader.DesiredSize.Height);
}
}
// Measure padding header.
this.PaddingHeader.Measure(new Size(0.0, lConstraintHeight));
lMaxHeight = Math.Max(lMaxHeight, this.PaddingHeader.DesiredSize.Height);
// Reserve space for padding header next to the last column.
lAccumulatedWidth += c_PaddingHeaderMinWidth;
// Measure indicator & floating header in re-ordering.
if (this.IsHeaderDragging)
{
// Measure indicator.
this.DragIndicator.Measure(pConstraint);
// Measure floating header.
this.FloatingHeader.Measure(pConstraint);
}
return(new Size(lAccumulatedWidth, lMaxHeight));
}
