/// <summary>
/// Sets the spacing mode of the element relative to the previous label/element group.
/// </summary>
/// <param name="element">The element to set.</param>
/// <param name="spacingMode">The spacing mode to use.</param>
public static void SetSpacingMode(FrameworkElement element, FormPanelSpacing spacingMode)
{
element.SetValue(SpacingModeProperty, spacingMode);
}
private void UpdateLayoutVertical()
{
ColumnDefinitionCollection columns = ColumnDefinitions;
if (columns.Count == 0)
{
// For a vertical layout, we have three columns:
// the Label, LabelSpacing, and the Control
columns.Add(new ColumnDefinition()
{
Width = new GridLength(0, GridUnitType.Auto)
});
columns.Add(new ColumnDefinition()
{
Width = new GridLength(LabelSpacing, GridUnitType.Pixel)
});
columns.Add(new ColumnDefinition()
{
Width = new GridLength(1, GridUnitType.Star)
});
}
RowDefinitionCollection rows = RowDefinitions;
rows.Clear();
int regularSpacing = Spacing;
int labelSpacing = LabelSpacing;
bool hasStretchingElement = false;
bool spanColumns = false;
bool createNewRow = true;
bool addSpacing = false;
int verticalSpacing = regularSpacing;
HorizontalAlignment labelAlignment = HorizontalAlignment.Left;
if (LabelAlignment == FormPanelLabelAlignment.Right)
{
labelAlignment = HorizontalAlignment.Right;
}
for (int i = 0; i < Children.Count; i++)
{
FrameworkElement element = (FrameworkElement)Children[i];
Label labelElement = element as Label;
// Create a new row if we know we need to create one or we
// encountered a label (even if we weren't expecting one)
if (createNewRow || ((labelElement != null) && (i != 0)))
{
if (addSpacing && (i != 0))
{
FormPanelSpacing spacingMode = GetSpacingMode(element);
if (spacingMode != FormPanelSpacing.Ignore)
{
if (spacingMode == FormPanelSpacing.Extra)
{
verticalSpacing += verticalSpacing;
}
rows.Add(new RowDefinition()
{
Height = new GridLength(verticalSpacing, GridUnitType.Pixel)
});
}
addSpacing = false;
}
rows.Add(new RowDefinition()
{
Height = new GridLength(0, GridUnitType.Auto)
});
}
Grid.SetRow(element, rows.Count - 1);
if (labelElement != null)
{
if (GetLabelPosition(labelElement) == FormPanelLabelPosition.Top)
{
labelElement.HorizontalAlignment = HorizontalAlignment.Left;
Grid.SetColumnSpan(labelElement, 3);
spanColumns = true;
createNewRow = true;
verticalSpacing = labelSpacing;
addSpacing = true;
}
else
{
labelElement.HorizontalAlignment = labelAlignment;
if (labelElement.VerticalAlignment != VerticalAlignment.Top)
{
labelElement.VerticalAlignment = VerticalAlignment.Center;
}
spanColumns = false;
createNewRow = false;
verticalSpacing = regularSpacing;
}
}
else
{
if (spanColumns || (GetIsLabeled(element) == false))
{
Grid.SetColumnSpan(element, 3);
spanColumns = false;
}
else
{
Grid.SetColumn(element, 2);
if (Double.IsNaN(element.Width) == false)
{
element.HorizontalAlignment = HorizontalAlignment.Left;
}
}
if ((hasStretchingElement == false) && GetIsStretched(element))
{
rows[rows.Count - 1].Height = new GridLength(1, GridUnitType.Star);
hasStretchingElement = true;
element.VerticalAlignment = VerticalAlignment.Stretch;
}
else
{
element.VerticalAlignment = VerticalAlignment.Center;
}
createNewRow = true;
verticalSpacing = regularSpacing;
addSpacing = true;
}
}
if (hasStretchingElement == false)
{
// Add the final filler row
rows.Add(new RowDefinition()
{
Height = new GridLength(1, GridUnitType.Star)
});
}
}
/// <summary>
/// Sets the spacing mode of the element relative to the previous label/element group.
/// </summary>
/// <param name="element">The element to set.</param>
/// <param name="spacingMode">The spacing mode to use.</param>
public static void SetSpacingMode(FrameworkElement element, FormPanelSpacing spacingMode)
{
element.SetValue(SpacingModeProperty, spacingMode);
}