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#include "cru/ui/render/window_render_object.hpp"
#include "cru/common/logger.hpp"
#include "cru/platform/graph/util/painter_util.hpp"
#include "cru/platform/native/native_window.hpp"
#include "cru/platform/native/ui_application.hpp"
#include "cru/ui/window.hpp"
#include <cassert>
namespace cru::ui::render {
class WindowRenderHost : public IRenderHost,
public SelfResolvable<WindowRenderHost> {
public:
WindowRenderHost(WindowRenderObject* render_object)
: render_object_(render_object) {
assert(render_object != nullptr);
}
void InvalidateLayout() override;
void InvalidatePaint() override {
render_object_->GetWindow()->GetNativeWindow()->Repaint();
}
IEvent<AfterLayoutEventArgs>* AfterLayoutEvent() override {
return &after_layout_event_;
}
private:
WindowRenderObject* render_object_;
bool need_layout_ = false;
Event<AfterLayoutEventArgs> after_layout_event_;
};
void WindowRenderHost::InvalidateLayout() {
if (!need_layout_) {
log::Debug(L"A relayout is required.");
platform::native::UiApplication::GetInstance()->InvokeLater(
[resolver = this->CreateResolver()] {
if (const auto host = resolver.Resolve()) {
host->render_object_->Relayout();
host->need_layout_ = false;
host->after_layout_event_.Raise(AfterLayoutEventArgs{});
log::Debug(L"A relayout finished.");
host->InvalidatePaint();
}
});
need_layout_ = true;
}
}
WindowRenderObject::WindowRenderObject(Window* window)
: window_(window), render_host_(new WindowRenderHost(this)) {
SetChildMode(ChildMode::Single);
SetRenderHost(render_host_.get());
after_layout_event_guard_.Reset(render_host_->AfterLayoutEvent()->AddHandler(
[this](auto) { NotifyAfterLayoutRecursive(this); }));
}
void WindowRenderObject::Relayout() {
const auto client_size = window_->GetNativeWindow()->GetClientSize();
Measure(client_size);
Layout(Rect{Point{}, client_size});
}
void WindowRenderObject::Draw(platform::graph::Painter* painter) {
painter->Clear(colors::white);
if (const auto child = GetChild()) {
auto offset = child->GetOffset();
platform::graph::util::WithTransform(
painter, platform::Matrix::Translation(offset.x, offset.y),
[child](platform::graph::Painter* p) { child->Draw(p); });
}
}
RenderObject* WindowRenderObject::HitTest(const Point& point) {
if (const auto child = GetChild()) {
auto offset = child->GetOffset();
Point p{point.x - offset.x, point.y - offset.y};
const auto result = child->HitTest(p);
if (result != nullptr) {
return result;
}
}
return Rect{Point{}, GetSize()}.IsPointInside(point) ? this : nullptr;
}
namespace {
void SetRenderHostRecursive(RenderObject* render_object, IRenderHost* host) {
render_object->SetRenderHost(host);
for (const auto child : render_object->GetChildren()) {
SetRenderHostRecursive(render_object, host);
}
}
} // namespace
void WindowRenderObject::OnAddChild(RenderObject* new_child, int position) {
SetRenderHostRecursive(new_child, render_host_.get());
}
void WindowRenderObject::OnRemoveChild(RenderObject* new_child, int position) {
SetRenderHostRecursive(new_child, nullptr);
}
Size WindowRenderObject::OnMeasureContent(const Size& available_size) {
if (const auto child = GetChild()) child->Measure(available_size);
return available_size;
}
void WindowRenderObject::OnLayoutContent(const Rect& content_rect) {
if (const auto child = GetChild()) child->Layout(content_rect);
}
} // namespace cru::ui::render
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