// Get the first control and measure, its height accepts as row height
double GetRowHeight(RibbonToolBarLayoutDefinition layoutDefinition)
{
const double defaultRowHeight = 0;
foreach (RibbonToolBarRow row in layoutDefinition.Rows)
{
foreach (DependencyObject item in row.Children)
{
RibbonToolBarControlDefinition controlDefinition = item as RibbonToolBarControlDefinition;
RibbonToolBarControlGroupDefinition controlGroupDefinition = item as RibbonToolBarControlGroupDefinition;
FrameworkElement control = null;
if (controlDefinition != null)
{
control = GetControl(controlDefinition);
}
else if (controlGroupDefinition != null)
{
control = GetControlGroup(controlGroupDefinition);
}
if (control == null)
{
return(defaultRowHeight);
}
control.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
return(control.DesiredSize.Height);
}
}
return(defaultRowHeight);
}
static void OnWidthPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
RibbonToolBarControlDefinition definition = (RibbonToolBarControlDefinition)d;
definition.Invalidate("Width");
}
/// <summary>
/// Layout logic for the given layout definition
/// </summary>
/// <param name="layoutDefinition">Current layout definition</param>
/// <param name="availableSize">Available or final size</param>
/// <param name="measure">Pass true if measure required; pass false if arrange required</param>
/// <param name="addchildren">Determines whether we have to add children to the logical and visual tree</param>
/// <returns>Final size</returns>
Size CustomLayout(RibbonToolBarLayoutDefinition layoutDefinition, Size availableSize, bool measure, bool addchildren)
{
bool arrange = !measure;
double availableHeight = Double.IsPositiveInfinity(availableSize.Height) ? 0 : availableSize.Height;
// Clear separator cahce
if (addchildren)
{
separatorCache.Clear();
}
// Get the first control and measure, its height accepts as row height
double rowHeight = GetRowHeight(layoutDefinition);
// Calculate whitespace
int rowCountInColumn = Math.Min(layoutDefinition.RowCount, layoutDefinition.Rows.Count);
double whitespace = (availableHeight - ((double)rowCountInColumn * rowHeight)) / (double)(rowCountInColumn + 1);
double y = 0;
double x = 0;
double currentRowBegin = 0;
double currentMaxX = 0;
double maxy = 0;
for (int rowIndex = 0; rowIndex < layoutDefinition.Rows.Count; rowIndex++)
{
RibbonToolBarRow row = layoutDefinition.Rows[rowIndex];
x = currentRowBegin;
if (rowIndex % rowCountInColumn == 0)
{
// Reset vars at new column
x = currentRowBegin = currentMaxX;
y = 0;
if (rowIndex != 0)
{
#region Add separator
Separator separator = null;
if (!separatorCache.TryGetValue(rowIndex, out separator))
{
separator = new Separator();
separator.Style = SeparatorStyle;
separatorCache.Add(rowIndex, separator);
}
if (measure)
{
separator.Height = availableHeight - separator.Margin.Bottom - separator.Margin.Top;
separator.Measure(availableSize);
}
if (arrange)
{
separator.Arrange(new Rect(x, y,
separator.DesiredSize.Width,
separator.DesiredSize.Height));
}
x += separator.DesiredSize.Width;
if (addchildren)
{
// Add control in the children
AddVisualChild(separator);
AddLogicalChild(separator);
actualChildren.Add(separator);
}
#endregion
}
}
y += whitespace;
// Measure & arrange new row
for (int i = 0; i < row.Children.Count; i++)
{
if (row.Children[i] is RibbonToolBarControlDefinition)
{
// Control Definition Case
RibbonToolBarControlDefinition controlDefinition =
(RibbonToolBarControlDefinition)row.Children[i];
FrameworkElement control = GetControl(controlDefinition);
if (control == null)
{
continue;
}
if (addchildren)
{
// Add control in the children
AddVisualChild(control);
AddLogicalChild(control);
actualChildren.Add(control);
}
if (measure)
{
// Apply Control Definition Properties
RibbonAttachedProperties.SetRibbonSize(control, RibbonAttachedProperties.GetRibbonSize(controlDefinition));
control.Width = controlDefinition.Width;
control.Measure(availableSize);
}
if (arrange)
{
control.Arrange(new Rect(x, y,
control.DesiredSize.Width,
control.DesiredSize.Height));
}
x += control.DesiredSize.Width;
}
if (row.Children[i] is RibbonToolBarControlGroupDefinition)
{
// Control Definition Case
RibbonToolBarControlGroupDefinition controlGroupDefinition =
(RibbonToolBarControlGroupDefinition)row.Children[i];
RibbonToolBarControlGroup control = GetControlGroup(controlGroupDefinition);
if (addchildren)
{
// Add control in the children
AddVisualChild(control);
AddLogicalChild(control);
actualChildren.Add(control);
}
if (measure)
{
// Apply Control Definition Properties
control.IsFirstInRow = (i == 0);
control.IsLastInRow = (i == row.Children.Count - 1);
control.Measure(availableSize);
}
if (arrange)
{
control.Arrange(new Rect(x, y,
control.DesiredSize.Width,
control.DesiredSize.Height));
}
x += control.DesiredSize.Width;
}
}
y += rowHeight;
if (currentMaxX < x)
{
currentMaxX = x;
}
if (maxy < y)
{
maxy = y;
}
}
return(new Size(currentMaxX, maxy + whitespace));
}
FrameworkElement GetControl(RibbonToolBarControlDefinition controlDefinition)
{
string name = controlDefinition.Target;
return(Children.FirstOrDefault(x => x.Name == name));
}