1 files changed, 101 insertions, 0 deletions
diff --git a/source/windowing/StarVerticalLayout.cpp b/source/windowing/StarVerticalLayout.cpp
new file mode 100644
index 0000000..d421a29
--- /dev/null
+++ b/source/windowing/StarVerticalLayout.cpp
@@ -0,0 +1,101 @@
+#include "StarVerticalLayout.hpp"
+
+namespace Star {
+
+VerticalLayout::VerticalLayout(VerticalAnchor verticalAnchor, int verticalSpacing) {
+  setVerticalAnchor(verticalAnchor);
+  setVerticalSpacing(verticalSpacing);
+
+  disableScissoring();
+}
+
+void VerticalLayout::update() {
+  m_size = Vec2I(0, 0);
+
+  if (m_members.empty())
+    return;
+
+  for (auto const& child : m_members) {
+    auto childSize = child->size();
+    m_size[1] += childSize[1];
+    m_size[0] = max(m_size[0], childSize[0]);
+  }
+  m_size[1] += (m_members.size() - 1) * m_verticalSpacing;
+
+  auto bounds = contentBoundRect();
+
+  int verticalPos = m_fillDown ? bounds.yMax() : bounds.yMin();
+  for (auto const& child : reverseIterate(m_members)) {
+    auto childSize = child->size();
+
+    Vec2I targetPosition;
+
+    if (m_horizontalAnchor == HorizontalAnchor::LeftAnchor)
+      targetPosition[0] = bounds.xMin();
+    else if (m_horizontalAnchor == HorizontalAnchor::RightAnchor)
+      targetPosition[0] = bounds.xMax() - childSize[0];
+    else if (m_horizontalAnchor == HorizontalAnchor::HMidAnchor)
+      targetPosition[0] = -childSize[0] / 2;
+
+    if (m_fillDown) {
+      verticalPos -= childSize[1];
+      targetPosition[1] = verticalPos;
+      verticalPos -= m_verticalSpacing;
+    } else {
+      targetPosition[1] = verticalPos;
+      verticalPos -= childSize[1];
+      verticalPos -= m_verticalSpacing;
+    }
+
+    // needed because position is included in relativeBoundRect
+    child->setPosition(Vec2I(0, 0));
+
+    child->setPosition(targetPosition - child->relativeBoundRect().min());
+  }
+}
+
+Vec2I VerticalLayout::size() const {
+  return m_size;
+}
+
+RectI VerticalLayout::relativeBoundRect() const {
+  return contentBoundRect().translated(relativePosition());
+}
+
+void VerticalLayout::setHorizontalAnchor(HorizontalAnchor horizontalAnchor) {
+  m_horizontalAnchor = horizontalAnchor;
+  update();
+}
+
+void VerticalLayout::setVerticalAnchor(VerticalAnchor verticalAnchor) {
+  m_verticalAnchor = verticalAnchor;
+  update();
+}
+
+void VerticalLayout::setVerticalSpacing(int verticalSpacing) {
+  m_verticalSpacing = verticalSpacing;
+  update();
+}
+
+void VerticalLayout::setFillDown(bool fillDown) {
+  m_fillDown = fillDown;
+  update();
+}
+
+RectI VerticalLayout::contentBoundRect() const {
+  auto min = Vec2I(0, 0);
+
+  if (m_horizontalAnchor == HorizontalAnchor::RightAnchor)
+    min[0] -= m_size[0];
+  else if (m_horizontalAnchor == HorizontalAnchor::HMidAnchor)
+    min[0] -= m_size[0] / 2;
+
+  if (m_verticalAnchor == VerticalAnchor::TopAnchor)
+    min[1] -= m_size[1];
+  else if (m_verticalAnchor == VerticalAnchor::VMidAnchor)
+    min[1] -= m_size[1] / 2;
+
+  return RectI::withSize(min, m_size);
+}
+
+}