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#include "cru/ui/controls/Control.hpp"
#include "cru/common/Base.hpp"
#include "cru/platform/gui/Cursor.hpp"
#include "cru/platform/gui/UiApplication.hpp"
#include "cru/ui/Base.hpp"
#include "cru/ui/host/WindowHost.hpp"
#include "cru/ui/render/RenderObject.hpp"
#include <memory>
namespace cru::ui::controls {
using platform::gui::ICursor;
using platform::gui::IUiApplication;
using platform::gui::SystemCursorType;
Control::Control() {
MouseEnterEvent()->Direct()->AddHandler([this](event::MouseEventArgs&) {
this->is_mouse_over_ = true;
this->OnMouseHoverChange(true);
});
MouseLeaveEvent()->Direct()->AddHandler([this](event::MouseEventArgs&) {
this->is_mouse_over_ = false;
this->OnMouseHoverChange(true);
});
}
Control::~Control() {
for (const auto child : children_) delete child;
}
host::WindowHost* Control::GetWindowHost() const { return window_host_; }
void Control::TraverseDescendants(
const std::function<void(Control*)>& predicate) {
predicate(this);
for (auto c : GetChildren()) c->TraverseDescendants(predicate);
}
bool Control::HasFocus() {
auto host = GetWindowHost();
if (host == nullptr) return false;
return host->GetFocusControl() == this;
}
bool Control::CaptureMouse() {
auto host = GetWindowHost();
if (host == nullptr) return false;
return host->CaptureMouseFor(this);
}
void Control::SetFocus() {
auto host = GetWindowHost();
if (host == nullptr) return;
host->SetFocusControl(this);
}
bool Control::ReleaseMouse() {
auto host = GetWindowHost();
if (host == nullptr) return false;
return host->CaptureMouseFor(nullptr);
}
bool Control::IsMouseCaptured() {
auto host = GetWindowHost();
if (host == nullptr) return false;
return host->GetMouseCaptureControl() == this;
}
std::shared_ptr<ICursor> Control::GetCursor() { return cursor_; }
std::shared_ptr<ICursor> Control::GetInheritedCursor() {
Control* control = this;
while (control != nullptr) {
const auto cursor = control->GetCursor();
if (cursor != nullptr) return cursor;
control = control->GetParent();
}
return IUiApplication::GetInstance()->GetCursorManager()->GetSystemCursor(
SystemCursorType::Arrow);
}
void Control::SetCursor(std::shared_ptr<ICursor> cursor) {
cursor_ = std::move(cursor);
const auto host = GetWindowHost();
if (host != nullptr) {
host->UpdateCursor();
}
}
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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