afb81b8278
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66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include <QtWidgets/QWidget>
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namespace Ui {
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namespace details {
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template <typename Value>
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class AttachmentOwner : public QObject {
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public:
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template <typename ...Args>
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AttachmentOwner(QObject *parent, Args &&...args)
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: QObject(parent)
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, _value(std::forward<Args>(args)...) {
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}
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gsl::not_null<Value*> value() {
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return &_value;
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}
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private:
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Value _value;
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};
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} // namespace details
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template <typename Value, typename Parent, typename ...Args>
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inline Value *CreateChild(
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Parent parent,
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Args &&...args) {
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if constexpr (std::is_pointer_v<Parent>) {
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Expects(parent != nullptr);
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if constexpr (std::is_base_of_v<QObject, Value>) {
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return new Value(parent, std::forward<Args>(args)...);
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} else {
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return CreateChild<details::AttachmentOwner<Value>>(
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parent,
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std::forward<Args>(args)...)->value();
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}
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} else if constexpr (requires(const Parent & t) { t.get(); }) {
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return new Value(parent.get(), std::forward<Args>(args)...);
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} else {
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static_assert(requires(const Parent &t) { t.data(); });
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return new Value(parent.data(), std::forward<Args>(args)...);
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}
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}
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template <typename Value>
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inline gsl::not_null<details::AttachmentOwner<std::decay_t<Value>>*> WrapAsQObject(
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gsl::not_null<QObject*> parent,
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Value &&value) {
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return CreateChild<details::AttachmentOwner<std::decay_t<Value>>>(
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parent.get(),
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std::forward<Value>(value));
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}
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} // namespace Ui
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