/// <summary>
/// Calculates the final height of this component and applies it to the component.
/// </summary>
/// <param name="component">The component to calculate.</param>
/// <param name="rowY">The row locations from GetRowHeights.</param>
/// <returns>true if the height was applied, or false if the component was not laid out
/// due to being disposed or set to ignore layout.</returns>
private static bool SetFinalHeight(SizedGridComponent component, float[] rowY)
{
var margin = component.Margin;
var sizes = component.VerticalSize;
var target = sizes.source;
bool ok = !sizes.ignore && target != null;
if (ok)
{
int rows = rowY.Length - 1;
// Clamp first and last row occupied by this object
int first = component.Row, last = first + component.RowSpan;
first = first.InRange(0, rows - 1);
last = last.InRange(1, rows);
// Align correctly in the cell box
float y = rowY[first], rowHeight = rowY[last] - y;
if (margin != null)
{
float border = margin.top + margin.bottom;
y += margin.top;
rowHeight -= border;
sizes.min -= border;
sizes.preferred -= border;
}
float actualHeight = PUIUtils.GetProperSize(sizes, rowHeight);
// Take alignment into account
y += PUIUtils.GetOffset(component.Alignment, PanelDirection.Vertical,
rowHeight - actualHeight);
target.rectTransform().SetInsetAndSizeFromParentEdge(RectTransform.Edge.
Top, y, actualHeight);
}
return(ok);
}
/// <summary>
/// Calculates the final width of this component and applies it to the component.
/// </summary>
/// <param name="component">The component to calculate.</param>
/// <param name="colX">The column locations from GetColumnWidths.</param>
/// <returns>true if the width was applied, or false if the component was not laid out
/// due to being disposed or set to ignore layout.</returns>
private static bool SetFinalWidth(SizedGridComponent component, float[] colX)
{
var margin = component.Margin;
var sizes = component.HorizontalSize;
var target = sizes.source;
bool ok = !sizes.ignore && target != null;
if (ok)
{
int columns = colX.Length - 1;
// Clamp first and last column occupied by this object
int first = component.Column, last = first + component.ColumnSpan;
first = first.InRange(0, columns - 1);
last = last.InRange(1, columns);
// Align correctly in the cell box
float x = colX[first], colWidth = colX[last] - x;
if (margin != null)
{
float border = margin.left + margin.right;
x += margin.left;
colWidth -= border;
sizes.min -= border;
sizes.preferred -= border;
}
float actualWidth = PUIUtils.GetProperSize(sizes, colWidth);
// Take alignment into account
x += PUIUtils.GetOffset(component.Alignment, PanelDirection.Horizontal,
colWidth - actualWidth);
target.rectTransform().SetInsetAndSizeFromParentEdge(RectTransform.Edge.
Left, x, actualWidth);
}
return(ok);
}
/// <summary>
/// Lays out components in the box layout container parallel to the layout axis.
/// </summary>
/// <param name="required">The calculated minimum and preferred sizes.</param>
/// <param name="args">The parameters to use for layout.</param>
/// <param name="status">The current status of layout.</param>
private static void DoLayoutLinear(BoxLayoutResults required, BoxLayoutParams args,
BoxLayoutStatus status)
{
var total = required.total;
var components = ListPool <ILayoutController, BoxLayoutGroup> .Allocate();
var direction = args.Direction;
// Determine flex size ratio
float size = status.size, prefRatio = 0.0f, minSize = total.min, prefSize =
total.preferred, excess = Math.Max(0.0f, size - prefSize), flexTotal = total.
flexible, offset = status.offset, spacing = args.Spacing;
if (size > minSize && prefSize > minSize)
{
// Do not divide by 0
prefRatio = Math.Min(1.0f, (size - minSize) / (prefSize - minSize));
}
if (excess > 0.0f && flexTotal == 0.0f)
{
// If no components can be expanded, offset all
offset += PUIUtils.GetOffset(args.Alignment, status.direction, excess);
}
foreach (var child in required.children)
{
var obj = child.source;
// Active objects only
if (obj != null && obj.activeInHierarchy)
{
float compSize = child.min;
if (prefRatio > 0.0f)
{
compSize += (child.preferred - child.min) * prefRatio;
}
if (excess > 0.0f && flexTotal > 0.0f)
{
compSize += excess * child.flexible / flexTotal;
}
// Place and size component
obj.AddOrGet <RectTransform>().SetInsetAndSizeFromParentEdge(status.edge,
offset, compSize);
offset += compSize + ((compSize > 0.0f) ? spacing : 0.0f);
// Invoke SetLayout on dependents
components.Clear();
obj.GetComponents(components);
foreach (var component in components)
{
if (direction == PanelDirection.Horizontal)
{
component.SetLayoutHorizontal();
}
else // if (direction == PanelDirection.Vertical)
{
component.SetLayoutVertical();
}
}
}
}
components.Recycle();
}
/// <summary>
/// Lays out components in the box layout container against the layout axis.
/// </summary>
/// <param name="required">The calculated minimum and preferred sizes.</param>
/// <param name="args">The parameters to use for layout.</param>
/// <param name="status">The current status of layout.</param>
private static void DoLayoutPerp(BoxLayoutResults required, BoxLayoutParams args,
BoxLayoutStatus status)
{
var components = ListPool <ILayoutController, BoxLayoutGroup> .Allocate();
var direction = args.Direction;
float size = status.size;
foreach (var child in required.children)
{
var obj = child.source;
// Active objects only
if (obj != null && obj.activeInHierarchy)
{
float compSize = size;
if (child.flexible <= 0.0f)
{
// Does not expand to all
compSize = Math.Min(compSize, child.preferred);
}
float offset = (size > compSize) ? PUIUtils.GetOffset(args.Alignment,
status.direction, size - compSize) : 0.0f;
// Place and size component
obj.AddOrGet <RectTransform>().SetInsetAndSizeFromParentEdge(status.edge,
offset + status.offset, compSize);
// Invoke SetLayout on dependents
components.Clear();
obj.GetComponents(components);
foreach (var component in components)
{
if (direction == PanelDirection.Horizontal)
{
component.SetLayoutVertical();
}
else // if (direction == PanelDirection.Vertical)
{
component.SetLayoutHorizontal();
}
}
}
}
components.Recycle();
}