From 962dc18ee4827b464764ec3708be3d00a9143971 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 21 Mar 2019 22:22:02 +0800
Subject: ...

---
 src/ui/layout_control.cpp | 52 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/ui/layout_control.cpp

(limited to 'src/ui/layout_control.cpp')

diff --git a/src/ui/layout_control.cpp b/src/ui/layout_control.cpp
new file mode 100644
index 00000000..d2b430dd
--- /dev/null
+++ b/src/ui/layout_control.cpp
@@ -0,0 +1,52 @@
+#include "layout_control.hpp"
+
+#include "window.hpp"
+
+namespace cru::ui {
+void ControlAddChildCheck(Control* control) {
+  if (control->GetParent() != nullptr)
+    throw std::invalid_argument("The control already has a parent.");
+
+  if (dynamic_cast<Window*>(control))
+    throw std::invalid_argument("Can't add a window as child.");
+}
+
+LayoutControl::~LayoutControl() {
+  for (const auto child : children_) delete child;
+}
+
+void LayoutControl::AddChild(Control* control, const int position) {
+  ControlAddChildCheck(control);
+
+  if (position < 0 || static_cast<decltype(children_.size())>(position) >
+                          this->children_.size())
+    throw std::invalid_argument("The position is out of range.");
+
+  children_.insert(this->children_.cbegin() + position, control);
+
+  control->_SetParent(this);
+  control->_SetDescendantWindow(GetWindow());
+
+  OnAddChild(control, position);
+}
+
+void LayoutControl::RemoveChild(const int position) {
+  if (position < 0 || static_cast<decltype(this->children_.size())>(position) >=
+                          this->children_.size())
+    throw std::invalid_argument("The position is out of range.");
+
+  const auto i = children_.cbegin() + position;
+  const auto child = *i;
+
+  children_.erase(i);
+
+  child->_SetParent(nullptr);
+  child->_SetDescendantWindow(nullptr);
+
+  OnRemoveChild(child, position);
+}
+
+void LayoutControl::OnAddChild(Control* child, int position) {}
+
+void LayoutControl::OnRemoveChild(Control* child, int position) {}
+}  // namespace cru::ui
-- 
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