// Token: 0x06005D0C RID: 23820 RVA: 0x001A2E74 File Offset: 0x001A1074
private void StartColumnHeaderDrag()
{
this._columnHeaderDragStartPosition = this._columnHeaderDragCurrentPosition;
DragStartedEventArgs e = new DragStartedEventArgs(this._columnHeaderDragStartPosition.X, this._columnHeaderDragStartPosition.Y);
this.ParentDataGrid.OnColumnHeaderDragStarted(e);
DataGridColumnReorderingEventArgs dataGridColumnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this._draggingSrcColumnHeader.Column);
this._columnHeaderDragIndicator = this.CreateColumnHeaderDragIndicator();
this._columnHeaderDropLocationIndicator = this.CreateColumnHeaderDropIndicator();
dataGridColumnReorderingEventArgs.DragIndicator = this._columnHeaderDragIndicator;
dataGridColumnReorderingEventArgs.DropLocationIndicator = this._columnHeaderDropLocationIndicator;
this.ParentDataGrid.OnColumnReordering(dataGridColumnReorderingEventArgs);
if (!dataGridColumnReorderingEventArgs.Cancel)
{
this._isColumnHeaderDragging = true;
this._columnHeaderDragIndicator = dataGridColumnReorderingEventArgs.DragIndicator;
this._columnHeaderDropLocationIndicator = dataGridColumnReorderingEventArgs.DropLocationIndicator;
if (this._columnHeaderDragIndicator != null)
{
this.SetDefaultsOnDragIndicator();
base.AddVisualChild(this._columnHeaderDragIndicator);
}
if (this._columnHeaderDropLocationIndicator != null)
{
this.SetDefaultsOnDropIndicator();
base.AddVisualChild(this._columnHeaderDropLocationIndicator);
}
this._draggingSrcColumnHeader.SuppressClickEvent = true;
base.InvalidateMeasure();
return;
}
this.FinishColumnHeaderDrag(true);
}
private void ComparisonGrid_ColumnReordering(object sender, DataGridColumnReorderingEventArgs e)
{
if (e.Column.DisplayIndex == 0)
{
e.Cancel = true;
}
_reorderingColumnPreviousDisplayIndex = e.Column.DisplayIndex;
}
private void OnMouseMove_BeginReorder(Point mousePosition)
{
DataGridColumnHeader dragIndicator = new DataGridColumnHeader();
dragIndicator.OwningColumn = this.OwningColumn;
dragIndicator.IsEnabled = false;
dragIndicator.Content = this.Content;
dragIndicator.ContentTemplate = this.ContentTemplate;
Control dropLocationIndicator = new ContentControl();
dropLocationIndicator.SetStyleWithType(this.OwningGrid.DropLocationIndicatorStyle);
if (this.OwningColumn.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningColumn.DragIndicatorStyle);
}
else if (this.OwningGrid.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningGrid.DragIndicatorStyle);
}
// If the user didn't style the dragIndicator's Width, default it to the column header's width
if (double.IsNaN(dragIndicator.Width))
{
dragIndicator.Width = this.ActualWidth;
}
// If the user didn't style the dropLocationIndicator's Height, default to the column header's height
if (double.IsNaN(dropLocationIndicator.Height))
{
dropLocationIndicator.Height = this.ActualHeight;
}
// pass the caret's data template to the user for modification
DataGridColumnReorderingEventArgs columnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this.OwningColumn)
{
DropLocationIndicator = dropLocationIndicator,
DragIndicator = dragIndicator
};
this.OwningGrid.OnColumnReordering(columnReorderingEventArgs);
if (columnReorderingEventArgs.Cancel)
{
return;
}
// The user didn't cancel, so prepare for the reorder
_dragColumn = this.OwningColumn;
_dragMode = DragMode.Reorder;
_dragStart = mousePosition;
// Display the reordering thumb
this.OwningGrid.ColumnHeaders.DragColumn = this.OwningColumn;
this.OwningGrid.ColumnHeaders.DragIndicator = columnReorderingEventArgs.DragIndicator;
this.OwningGrid.ColumnHeaders.DropLocationIndicator = columnReorderingEventArgs.DropLocationIndicator;
}
protected override void OnColumnReordering(DataGridColumnReorderingEventArgs e)
{
base.OnColumnReordering(e);
// Check if the reordering column is the last column
if (e.Column.DisplayIndex == this.Columns.Count - 1)
{
// This is the last column, therefore abort reordering
e.Cancel = true;
}
}
/// <summary>
/// Method which start the column header drag. Includes raising events and creating default ghosts
/// </summary>
private void StartColumnHeaderDrag()
{
Debug.Assert(ParentDataGrid != null, "ParentDataGrid is null");
_columnHeaderDragStartPosition = _columnHeaderDragCurrentPosition;
DragStartedEventArgs dragStartedEventArgs = new DragStartedEventArgs(_columnHeaderDragStartPosition.X, _columnHeaderDragStartPosition.Y);
ParentDataGrid.OnColumnHeaderDragStarted(dragStartedEventArgs);
DataGridColumnReorderingEventArgs reorderingEventArgs = new DataGridColumnReorderingEventArgs(_draggingSrcColumnHeader.Column);
_columnHeaderDragIndicator = CreateColumnHeaderDragIndicator();
_columnHeaderDropLocationIndicator = CreateColumnHeaderDropIndicator();
reorderingEventArgs.DragIndicator = _columnHeaderDragIndicator;
reorderingEventArgs.DropLocationIndicator = _columnHeaderDropLocationIndicator;
ParentDataGrid.OnColumnReordering(reorderingEventArgs);
if (!reorderingEventArgs.Cancel)
{
_isColumnHeaderDragging = true;
_columnHeaderDragIndicator = reorderingEventArgs.DragIndicator;
_columnHeaderDropLocationIndicator = reorderingEventArgs.DropLocationIndicator;
if (_columnHeaderDragIndicator != null)
{
SetDefaultsOnDragIndicator();
AddVisualChild(_columnHeaderDragIndicator);
}
if (_columnHeaderDropLocationIndicator != null)
{
SetDefaultsOnDropIndicator();
AddVisualChild(_columnHeaderDropLocationIndicator);
}
_draggingSrcColumnHeader.SuppressClickEvent = true;
InvalidateMeasure();
}
else
{
FinishColumnHeaderDrag(true);
}
}
protected internal virtual void OnColumnReordering(DataGridColumnReorderingEventArgs e)
{
if (ColumnReordering != null)
{
ColumnReordering(this, e);
}
}
private void OnPointerMove_BeginReorder(uint pointerId, Point pointerPosition)
{
Debug.Assert(this.OwningGrid != null, "Expected non-null OwningGrid.");
DataGridColumnHeader dragIndicator = new DataGridColumnHeader();
dragIndicator.OwningColumn = this.OwningColumn;
dragIndicator.IsEnabled = false;
dragIndicator.Content = this.Content;
dragIndicator.ContentTemplate = this.ContentTemplate;
Control dropLocationIndicator = new ContentControl();
dropLocationIndicator.SetStyleWithType(this.OwningGrid.DropLocationIndicatorStyle);
if (this.OwningColumn.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningColumn.DragIndicatorStyle);
}
else if (this.OwningGrid.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningGrid.DragIndicatorStyle);
}
// If the user didn't style the dragIndicator's Width, default it to the column header's width.
if (double.IsNaN(dragIndicator.Width))
{
dragIndicator.Width = this.ActualWidth;
}
// If the user didn't style the dropLocationIndicator's Height, default to the column header's height.
if (double.IsNaN(dropLocationIndicator.Height))
{
dropLocationIndicator.Height = this.ActualHeight;
}
// pass the caret's data template to the user for modification.
DataGridColumnReorderingEventArgs columnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this.OwningColumn)
{
DropLocationIndicator = dropLocationIndicator,
DragIndicator = dragIndicator
};
this.OwningGrid.OnColumnReordering(columnReorderingEventArgs);
if (columnReorderingEventArgs.Cancel)
{
return;
}
DataGridColumnHeaderInteractionInfo interactionInfo = this.OwningGrid.ColumnHeaderInteractionInfo;
// The app didn't cancel, so prepare for the reorder.
interactionInfo.DragColumn = this.OwningColumn;
Debug.Assert(interactionInfo.DragMode != DragMode.None, "Expected _dragMode other than None.");
interactionInfo.DragMode = DragMode.Reorder;
interactionInfo.DragPointerId = pointerId;
interactionInfo.DragStart = pointerPosition;
// Display the reordering thumb.
this.OwningGrid.ColumnHeaders.DragColumn = this.OwningColumn;
this.OwningGrid.ColumnHeaders.DragIndicator = columnReorderingEventArgs.DragIndicator;
this.OwningGrid.ColumnHeaders.DropLocationIndicator = columnReorderingEventArgs.DropLocationIndicator;
}
private void dataGrid_ColumnReordering(object sender, DataGridColumnReorderingEventArgs e)
{
currentCellElement = CurrentCellContainer;
}
private void OnMouseMove_BeginReorder(Point mousePosition, Point mousePositionGridParent)
{
DataGridColumnHeader dragIndicator = new DataGridColumnHeader();
dragIndicator.OwningColumn = this.OwningColumn;
dragIndicator.IsEnabled = false;
dragIndicator.Content = this.Content;
dragIndicator.ContentTemplate = this.ContentTemplate;
if (this.OwningColumn.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningColumn.DragIndicatorStyle);
}
else if (this.OwningGrid.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningGrid.DragIndicatorStyle);
}
// If the user didn't style the dragIndicator's Width, default it to the column header's width
if (double.IsNaN(dragIndicator.Width))
{
dragIndicator.Width = this.ActualWidth;
}
// If the user didn't style the dropLocationIndicator's Height, default to the column header's height
if (double.IsNaN(this.OwningGrid.ColumnDropLocationIndicator.Height))
{
this._autoSizeDropLocationIndicatorHeight = true;
this.OwningGrid.ColumnDropLocationIndicator.Height = this.ActualHeight;
}
// pass the caret's data template to the user for modification
DataGridColumnReorderingEventArgs columnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this.OwningColumn)
{
DropLocationIndicator = this.OwningGrid.ColumnDropLocationIndicator,
DragIndicator = dragIndicator
};
this.OwningGrid.OnColumnReordering(columnReorderingEventArgs);
if (columnReorderingEventArgs.Cancel)
{
return;
}
// The user didn't cancel, so prepare for the reorder
_dragColumn = this.OwningColumn;
_dragMode = DragMode.Reorder;
_dragStartParent = mousePositionGridParent;
// the mouse position relative to the ColumnHeader needs to be scaled to be in the same
// dimensions as the DataGrid, so that it doesn't get out of sync later on
_dragStart = this.OwningGrid.RenderTransform.Transform(mousePosition);
// Display the reordering thumb
if (_reorderingThumb == null)
{
_reorderingThumb = new Popup();
}
_reorderingThumb.Child = columnReorderingEventArgs.DragIndicator;
_reorderingThumb.IsOpen = true;
// use the data template to populate the caret
if (columnReorderingEventArgs.DropLocationIndicator != null)
{
Control child = columnReorderingEventArgs.DropLocationIndicator;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Child = child;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Height = child.ActualHeight;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Width = child.ActualWidth;
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
}
private void OnMouseMove_Reorder(ref bool handled, Point mousePosition, Point mousePositionHeaders, Point mousePositionGrid, Point mousePositionGridParent, double distanceFromLeft, double distanceFromRight)
{
if (handled)
{
return;
}
#region handle entry into reorder mode
if (_dragMode == DragMode.MouseDown && _dragColumn == null && (distanceFromRight > DATAGRIDCOLUMNHEADER_resizeRegionWidth && distanceFromLeft > DATAGRIDCOLUMNHEADER_resizeRegionWidth))
{
DragStartedEventArgs dragStartedEventArgs = new DragStartedEventArgs(mousePositionGrid.X - _lastMousePositionGrid.Value.X, mousePositionGrid.Y - _lastMousePositionGrid.Value.Y);
this.OwningGrid.OnColumnHeaderDragStarted(dragStartedEventArgs);
handled = CanReorderColumn(this.OwningColumn);
if (handled)
{
DataGridColumnHeader dragIndicator = new DataGridColumnHeader();
dragIndicator.OwningColumn = this.OwningColumn;
dragIndicator.IsEnabled = false;
dragIndicator.Content = this.Content;
dragIndicator.ContentTemplate = this.ContentTemplate;
if (this.OwningGrid.DragIndicatorStyle != null)
{
dragIndicator.Style = this.OwningGrid.DragIndicatorStyle;
}
// If the user didn't style the dragIndicator's Width, default it to the column header's width
if (double.IsNaN(dragIndicator.Width))
{
dragIndicator.Width = this.ActualWidth;
}
// If the user didn't style the dropLocationIndicator's Height, default to the column header's height
//
if (double.IsNaN(this.OwningGrid.ColumnDropLocationIndicator.Height))
{
this.OwningGrid.ColumnDropLocationIndicator.Height = this.ActualHeight;
}
// pass the caret's data template to the user for modification
DataGridColumnReorderingEventArgs columnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this.OwningColumn)
{
DropLocationIndicator = this.OwningGrid.ColumnDropLocationIndicator,
DragIndicator = dragIndicator
};
this.OwningGrid.OnColumnReordering(columnReorderingEventArgs);
if (columnReorderingEventArgs.Cancel)
{
return;
}
// The user didn't cancel, so prepare for the reorder
_dragColumn = this.OwningColumn;
_dragMode = DragMode.Reorder;
_dragStartParent = mousePositionGridParent;
// the mouse position relative to the ColumnHeader needs to be scaled to be in the same
// dimensions as the DataGrid, so that it doesn't get out of sync later on
_dragStart = this.OwningGrid.RenderTransform.Transform(mousePosition);
// Display the reordering thumb
if (_reorderingThumb == null)
{
_reorderingThumb = new Popup();
}
_reorderingThumb.Child = columnReorderingEventArgs.DragIndicator;
_reorderingThumb.IsOpen = true;
// use the data template to populate the caret
if (columnReorderingEventArgs.DropLocationIndicator != null)
{
Control child = columnReorderingEventArgs.DropLocationIndicator;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Child = child;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Height = child.ActualHeight;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Width = child.ActualWidth;
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
}
}
#endregion
#region handle reorder mode (eg, positioning of the popup)
if (_dragMode == DragMode.Reorder && _reorderingThumb != null)
{
DragDeltaEventArgs dragDeltaEventArgs = new DragDeltaEventArgs(mousePositionGrid.X - _lastMousePositionGrid.Value.X, mousePositionGrid.Y - _lastMousePositionGrid.Value.Y);
this.OwningGrid.OnColumnHeaderDragDelta(dragDeltaEventArgs);
_reorderingThumb.HorizontalOffset = mousePositionGridParent.X - _dragStart.Value.X;
_reorderingThumb.VerticalOffset = _dragStartParent.Value.Y - _dragStart.Value.Y;
// the mouse position relative to the ColumnHeadersPresenter can be scaled differently than
// the same position relative to the DataGrid, so apply the grid's RenderTransform
Point scaledMousePositionHeaders = this.OwningGrid.RenderTransform.Transform(mousePositionHeaders);
// prepare some variables for clipping/hiding
double dgX = mousePositionGridParent.X - scaledMousePositionHeaders.X;
double dgY = mousePositionGridParent.Y - scaledMousePositionHeaders.Y;
double dgW = this.OwningGrid.CellsWidth;
double dgH = this.OwningGrid.CellsHeight + this.OwningGrid.ColumnHeaders.ActualHeight;
// we need to transform the size of the clipping rectangle if the datagrid has a rendertransform set
Point clipSize = new Point(dgW, dgH);
clipSize = this.OwningGrid.RenderTransform.Transform(clipSize);
// clip the thumb to the column headers region
_reorderingThumb.Child.Clip = new RectangleGeometry
{
Rect = new Rect(
dgX - _reorderingThumb.HorizontalOffset,
dgY - _reorderingThumb.VerticalOffset,
clipSize.X,
clipSize.Y
)
};
// if the datagrid has a scale transform, apply the inverse to the popup's clipping rectangle
ScaleTransform scaleTransform = null;
ScaleTransform gridScaleTransform = _reorderingThumb.Child.RenderTransform as ScaleTransform;
if (gridScaleTransform != null && gridScaleTransform.ScaleY != 0.0 && gridScaleTransform.ScaleX != 0.0)
{
scaleTransform = new ScaleTransform();
scaleTransform.ScaleX = 1.0 / gridScaleTransform.ScaleX;
scaleTransform.ScaleY = 1.0 / gridScaleTransform.ScaleY;
}
if (scaleTransform != null)
{
_reorderingThumb.Child.Clip.Transform = scaleTransform;
}
// Find header we're hovering over
DataGridColumn targetColumn = this.GetReorderingTargetColumn(mousePosition, true /* ignoreVertical */, true /* clipToVisible */);
if (this.OwningGrid.ColumnDropLocationIndicator != null)
{
if (targetColumn == this.OwningGrid.ColumnsInternal.FillerColumn)
{
// change target column to last column but position caret at the end
targetColumn = this.OwningGrid.ColumnsInternal.LastVisibleColumn;
Point targetPosition = this.OwningGrid.RenderTransform.Transform(this.Translate(targetColumn.HeaderCell, mousePosition));
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = true;
this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset = mousePositionGridParent.X - targetPosition.X + targetColumn.HeaderCell.ActualWidth;
this.OwningGrid.ColumnDropLocationIndicatorPopup.VerticalOffset = mousePositionGridParent.Y - targetPosition.Y;
}
else if (targetColumn != null)
{
// try to position caret
Point targetPosition = this.OwningGrid.RenderTransform.Transform(this.Translate(targetColumn.HeaderCell, mousePosition));
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = true;
this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset = mousePositionGridParent.X - targetPosition.X;
this.OwningGrid.ColumnDropLocationIndicatorPopup.VerticalOffset = mousePositionGridParent.Y - targetPosition.Y;
}
else
{
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
// hide the caret if it's off the grid -- this is not the same as clipping
if (this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset < dgX
|| dgX + clipSize.X < this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset)
{
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
}
handled = true;
}
#endregion
}
private void OnMouseMove_Reorder(ref bool handled, Point mousePosition, Point mousePositionHeaders, Point mousePositionGrid, Point mousePositionGridParent, double distanceFromLeft, double distanceFromRight)
{
if (handled)
{
return;
}
#region handle entry into reorder mode
if (_dragMode == DragMode.MouseDown && _dragColumn == null && (distanceFromRight > DATAGRIDCOLUMNHEADER_resizeRegionWidth && distanceFromLeft > DATAGRIDCOLUMNHEADER_resizeRegionWidth))
{
DragStartedEventArgs dragStartedEventArgs = new DragStartedEventArgs(mousePositionGrid.X - _lastMousePositionGrid.Value.X, mousePositionGrid.Y - _lastMousePositionGrid.Value.Y);
this.OwningGrid.OnColumnHeaderDragStarted(dragStartedEventArgs);
handled = CanReorderColumn(this.OwningColumn);
if (handled)
{
DataGridColumnHeader dragIndicator = new DataGridColumnHeader();
dragIndicator.OwningColumn = this.OwningColumn;
dragIndicator.IsEnabled = false;
dragIndicator.Content = this.Content;
dragIndicator.ContentTemplate = this.ContentTemplate;
if (this.OwningGrid.DragIndicatorStyle != null)
{
dragIndicator.Style = this.OwningGrid.DragIndicatorStyle;
}
// If the user didn't style the dragIndicator's Width, default it to the column header's width
if (double.IsNaN(dragIndicator.Width))
{
dragIndicator.Width = this.ActualWidth;
}
// If the user didn't style the dropLocationIndicator's Height, default to the column header's height
//
if (double.IsNaN(this.OwningGrid.ColumnDropLocationIndicator.Height))
{
this.OwningGrid.ColumnDropLocationIndicator.Height = this.ActualHeight;
}
// pass the caret's data template to the user for modification
DataGridColumnReorderingEventArgs columnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this.OwningColumn)
{
DropLocationIndicator = this.OwningGrid.ColumnDropLocationIndicator,
DragIndicator = dragIndicator
};
this.OwningGrid.OnColumnReordering(columnReorderingEventArgs);
if (columnReorderingEventArgs.Cancel)
{
return;
}
// The user didn't cancel, so prepare for the reorder
_dragColumn = this.OwningColumn;
_dragMode = DragMode.Reorder;
_dragStartParent = mousePositionGridParent;
// the mouse position relative to the ColumnHeader needs to be scaled to be in the same
// dimensions as the DataGrid, so that it doesn't get out of sync later on
_dragStart = this.OwningGrid.RenderTransform.Transform(mousePosition);
// Display the reordering thumb
if (_reorderingThumb == null)
{
_reorderingThumb = new Popup();
}
_reorderingThumb.Child = columnReorderingEventArgs.DragIndicator;
_reorderingThumb.IsOpen = true;
// use the data template to populate the caret
if (columnReorderingEventArgs.DropLocationIndicator != null)
{
Control child = columnReorderingEventArgs.DropLocationIndicator;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Child = child;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Height = child.ActualHeight;
this.OwningGrid.ColumnDropLocationIndicatorPopup.Width = child.ActualWidth;
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
}
}
#endregion
#region handle reorder mode (eg, positioning of the popup)
if (_dragMode == DragMode.Reorder && _reorderingThumb != null)
{
DragDeltaEventArgs dragDeltaEventArgs = new DragDeltaEventArgs(mousePositionGrid.X - _lastMousePositionGrid.Value.X, mousePositionGrid.Y - _lastMousePositionGrid.Value.Y);
this.OwningGrid.OnColumnHeaderDragDelta(dragDeltaEventArgs);
_reorderingThumb.HorizontalOffset = mousePositionGridParent.X - _dragStart.Value.X;
_reorderingThumb.VerticalOffset = _dragStartParent.Value.Y - _dragStart.Value.Y;
// the mouse position relative to the ColumnHeadersPresenter can be scaled differently than
// the same position relative to the DataGrid, so apply the grid's RenderTransform
Point scaledMousePositionHeaders = this.OwningGrid.RenderTransform.Transform(mousePositionHeaders);
// prepare some variables for clipping/hiding
double dgX = mousePositionGridParent.X - scaledMousePositionHeaders.X;
double dgY = mousePositionGridParent.Y - scaledMousePositionHeaders.Y;
double dgW = this.OwningGrid.CellsWidth;
double dgH = this.OwningGrid.CellsHeight + this.OwningGrid.ColumnHeaders.ActualHeight;
// we need to transform the size of the clipping rectangle if the datagrid has a rendertransform set
Point clipSize = new Point(dgW, dgH);
clipSize = this.OwningGrid.RenderTransform.Transform(clipSize);
// clip the thumb to the column headers region
_reorderingThumb.Child.Clip = new RectangleGeometry
{
Rect = new Rect(
dgX - _reorderingThumb.HorizontalOffset,
dgY - _reorderingThumb.VerticalOffset,
clipSize.X,
clipSize.Y
)
};
// if the datagrid has a scale transform, apply the inverse to the popup's clipping rectangle
ScaleTransform scaleTransform = null;
ScaleTransform gridScaleTransform = _reorderingThumb.Child.RenderTransform as ScaleTransform;
if (gridScaleTransform != null && gridScaleTransform.ScaleY != 0.0 && gridScaleTransform.ScaleX != 0.0)
{
scaleTransform = new ScaleTransform();
scaleTransform.ScaleX = 1.0 / gridScaleTransform.ScaleX;
scaleTransform.ScaleY = 1.0 / gridScaleTransform.ScaleY;
}
if (scaleTransform != null)
{
_reorderingThumb.Child.Clip.Transform = scaleTransform;
}
// Find header we're hovering over
DataGridColumn targetColumn = this.GetReorderingTargetColumn(mousePosition, true /* ignoreVertical */, true /* clipToVisible */);
if (this.OwningGrid.ColumnDropLocationIndicator != null)
{
if (targetColumn == this.OwningGrid.ColumnsInternal.FillerColumn)
{
// change target column to last column but position caret at the end
targetColumn = this.OwningGrid.ColumnsInternal.LastVisibleColumn;
Point targetPosition = this.OwningGrid.RenderTransform.Transform(this.Translate(targetColumn.HeaderCell, mousePosition));
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = true;
this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset = mousePositionGridParent.X - targetPosition.X + targetColumn.HeaderCell.ActualWidth;
this.OwningGrid.ColumnDropLocationIndicatorPopup.VerticalOffset = mousePositionGridParent.Y - targetPosition.Y;
}
else if (targetColumn != null)
{
// try to position caret
Point targetPosition = this.OwningGrid.RenderTransform.Transform(this.Translate(targetColumn.HeaderCell, mousePosition));
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = true;
this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset = mousePositionGridParent.X - targetPosition.X;
this.OwningGrid.ColumnDropLocationIndicatorPopup.VerticalOffset = mousePositionGridParent.Y - targetPosition.Y;
}
else
{
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
// hide the caret if it's off the grid -- this is not the same as clipping
if (this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset < dgX ||
dgX + clipSize.X < this.OwningGrid.ColumnDropLocationIndicatorPopup.HorizontalOffset)
{
this.OwningGrid.ColumnDropLocationIndicatorPopup.IsOpen = false;
}
}
handled = true;
}
#endregion
}
private void OnMouseMove_BeginReorder(Point mousePosition)
{
DataGridColumnHeader dragIndicator = new DataGridColumnHeader();
dragIndicator.OwningColumn = this.OwningColumn;
dragIndicator.IsEnabled = false;
dragIndicator.Content = this.Content;
dragIndicator.ContentTemplate = this.ContentTemplate;
Control dropLocationIndicator = new ContentControl();
dropLocationIndicator.SetStyleWithType(this.OwningGrid.DropLocationIndicatorStyle);
if (this.OwningColumn.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningColumn.DragIndicatorStyle);
}
else if (this.OwningGrid.DragIndicatorStyle != null)
{
dragIndicator.SetStyleWithType(this.OwningGrid.DragIndicatorStyle);
}
// If the user didn't style the dragIndicator's Width, default it to the column header's width
if (double.IsNaN(dragIndicator.Width))
{
dragIndicator.Width = this.ActualWidth;
}
// If the user didn't style the dropLocationIndicator's Height, default to the column header's height
if (double.IsNaN(dropLocationIndicator.Height))
{
dropLocationIndicator.Height = this.ActualHeight;
}
// pass the caret's data template to the user for modification
DataGridColumnReorderingEventArgs columnReorderingEventArgs = new DataGridColumnReorderingEventArgs(this.OwningColumn)
{
DropLocationIndicator = dropLocationIndicator,
DragIndicator = dragIndicator
};
this.OwningGrid.OnColumnReordering(columnReorderingEventArgs);
if (columnReorderingEventArgs.Cancel)
{
return;
}
// The user didn't cancel, so prepare for the reorder
_dragColumn = this.OwningColumn;
_dragMode = DragMode.Reorder;
_dragStart = mousePosition;
// Display the reordering thumb
this.OwningGrid.ColumnHeaders.DragColumn = this.OwningColumn;
this.OwningGrid.ColumnHeaders.DragIndicator = columnReorderingEventArgs.DragIndicator;
this.OwningGrid.ColumnHeaders.DropLocationIndicator = columnReorderingEventArgs.DropLocationIndicator;
}
