From b8863c403a44c1c7ac35f1a1da92bbf3c8858552 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 9 Feb 2022 23:53:18 +0800
Subject: ...

---
 src/ui/controls/Control.cpp | 93 ++++++---------------------------------------
 1 file changed, 11 insertions(+), 82 deletions(-)

(limited to 'src/ui/controls/Control.cpp')

diff --git a/src/ui/controls/Control.cpp b/src/ui/controls/Control.cpp
index 36d5cd60..df71f660 100644
--- a/src/ui/controls/Control.cpp
+++ b/src/ui/controls/Control.cpp
@@ -31,31 +31,21 @@ Control::Control() {
   });
 }
 
-Control::~Control() {
-  if (auto_delete_children_) {
-    for (const auto child : children_) {
-      delete child;
-    }
-  }
-}
-
-host::WindowHost* Control::GetWindowHost() const { return window_host_; }
+Control::~Control() {}
 
-Index Control::IndexOf(Control* child) const {
-  for (Index i = 0; i < children_.size(); ++i) {
-    if (children_[i] == child) return i;
+host::WindowHost* Control::GetWindowHost() const {
+  auto parent = GetParent();
+  if (parent) {
+    return parent->GetWindowHost();
   }
-  return -1;
+  return nullptr;
 }
 
-void Control::TraverseDescendants(
-    const std::function<void(Control*)>& predicate) {
-  predicate(this);
-  for (auto c : GetChildren()) c->TraverseDescendants(predicate);
-}
-
-void Control::RemoveFromParent() {
-  if (parent_) parent_->RemoveChild(parent_->IndexOf(this));
+void Control::SetParent(Control* parent) {
+  if (parent_ == parent) return;
+  auto old_parent = parent_;
+  parent_ = parent;
+  OnParentChanged(old_parent, parent);
 }
 
 bool Control::HasFocus() {
@@ -117,65 +107,4 @@ void Control::SetCursor(std::shared_ptr<ICursor> cursor) {
 std::shared_ptr<style::StyleRuleSet> Control::GetStyleRuleSet() {
   return style_rule_set_;
 }
-
-void Control::AddChild(Control* control, const Index position) {
-  Expects(control->GetParent() ==
-          nullptr);  // The control already has a parent.
-  Expects(position >= 0);
-  Expects(position <= static_cast<Index>(
-                          children_.size()));  // The position is out of range.
-
-  children_.insert(children_.cbegin() + position, control);
-
-  const auto old_parent = control->parent_;
-  control->parent_ = this;
-
-  OnAddChild(control, position);
-  control->OnParentChanged(old_parent, this);
-
-  if (window_host_)
-    control->TraverseDescendants([this](Control* control) {
-      control->window_host_ = window_host_;
-      control->OnAttachToHost(window_host_);
-    });
-}
-
-void Control::RemoveChild(const Index position) {
-  Expects(position >= 0);
-  Expects(position < static_cast<Index>(
-                         children_.size()));  // The position is out of range.
-
-  const auto i = children_.cbegin() + position;
-  const auto control = *i;
-
-  children_.erase(i);
-  control->parent_ = nullptr;
-
-  OnRemoveChild(control, position);
-  control->OnParentChanged(this, nullptr);
-
-  if (window_host_)
-    control->TraverseDescendants([this](Control* control) {
-      control->window_host_ = nullptr;
-      control->OnDetachFromHost(window_host_);
-    });
-}
-
-void Control::OnAddChild(Control* child, Index position) {
-  CRU_UNUSED(child)
-  CRU_UNUSED(position)
-}
-void Control::OnRemoveChild(Control* child, Index position) {
-  CRU_UNUSED(child)
-  CRU_UNUSED(position)
-}
-
-void Control::OnParentChanged(Control* old_parent, Control* new_parent) {
-  CRU_UNUSED(old_parent)
-  CRU_UNUSED(new_parent)
-}
-
-void Control::OnAttachToHost(host::WindowHost* host) { CRU_UNUSED(host) }
-
-void Control::OnDetachFromHost(host::WindowHost* host) { CRU_UNUSED(host) }
 }  // namespace cru::ui::controls
-- 
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