155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include "boxes/abstract_box.h"
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#include "ui/wrap/vertical_layout.h"
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#include <tuple>
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namespace st {
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extern const style::margins &boxRowPadding;
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} // namespace st
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class GenericBox : public BoxContent {
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public:
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// InitMethod::operator()(not_null<GenericBox*> box, InitArgs...)
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// init(box, args...)
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template <
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typename InitMethod,
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typename ...InitArgs,
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typename = decltype(std::declval<std::decay_t<InitMethod>>()(
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std::declval<not_null<GenericBox*>>(),
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std::declval<std::decay_t<InitArgs>>()...))>
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GenericBox(
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QWidget*,
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InitMethod &&init,
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InitArgs &&...args);
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void setWidth(int width) {
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_width = width;
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}
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void setFocusCallback(Fn<void()> callback) {
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_focus = callback;
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}
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int rowsCount() const {
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return _content->count();
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}
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template <
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typename Widget,
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typename = std::enable_if_t<
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std::is_base_of_v<RpWidget, Widget>>>
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Widget *insertRow(
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int atPosition,
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object_ptr<Widget> &&child,
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const style::margins &margin = st::boxRowPadding) {
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return _content->insert(
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atPosition,
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std::move(child),
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margin);
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}
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template <
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typename Widget,
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typename = std::enable_if_t<
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std::is_base_of_v<RpWidget, Widget>>>
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Widget *addRow(
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object_ptr<Widget> &&child,
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const style::margins &margin = st::boxRowPadding) {
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return _content->add(std::move(child), margin);
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}
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void addSkip(int height);
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void setInnerFocus() override {
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if (_focus) {
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_focus();
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}
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}
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protected:
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void prepare() override;
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private:
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template <typename InitMethod, typename ...InitArgs>
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struct Initer {
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template <
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typename OtherMethod,
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typename ...OtherArgs,
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typename = std::enable_if_t<
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std::is_constructible_v<InitMethod, OtherMethod&&>>>
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Initer(OtherMethod &&method, OtherArgs &&...args);
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void operator()(not_null<GenericBox*> box);
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template <std::size_t... I>
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void call(
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not_null<GenericBox*> box,
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std::index_sequence<I...>);
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InitMethod method;
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std::tuple<InitArgs...> args;
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};
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template <typename InitMethod, typename ...InitArgs>
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auto MakeIniter(InitMethod &&method, InitArgs &&...args)
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-> Initer<std::decay_t<InitMethod>, std::decay_t<InitArgs>...>;
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FnMut<void(not_null<GenericBox*>)> _init;
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Fn<void()> _focus;
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object_ptr<Ui::VerticalLayout> _content;
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int _width = 0;
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};
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template <typename InitMethod, typename ...InitArgs>
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template <typename OtherMethod, typename ...OtherArgs, typename>
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GenericBox::Initer<InitMethod, InitArgs...>::Initer(
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OtherMethod &&method,
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OtherArgs &&...args)
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: method(std::forward<OtherMethod>(method))
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, args(std::forward<OtherArgs>(args)...) {
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}
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template <typename InitMethod, typename ...InitArgs>
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inline void GenericBox::Initer<InitMethod, InitArgs...>::operator()(
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not_null<GenericBox*> box) {
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call(box, std::make_index_sequence<sizeof...(InitArgs)>());
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}
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template <typename InitMethod, typename ...InitArgs>
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template <std::size_t... I>
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inline void GenericBox::Initer<InitMethod, InitArgs...>::call(
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not_null<GenericBox*> box,
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std::index_sequence<I...>) {
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std::invoke(method, box, std::get<I>(args)...);
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}
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template <typename InitMethod, typename ...InitArgs>
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inline auto GenericBox::MakeIniter(InitMethod &&method, InitArgs &&...args)
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-> Initer<std::decay_t<InitMethod>, std::decay_t<InitArgs>...> {
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return {
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std::forward<InitMethod>(method),
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std::forward<InitArgs>(args)...
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};
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}
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template <typename InitMethod, typename ...InitArgs, typename>
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inline GenericBox::GenericBox(
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QWidget*,
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InitMethod &&init,
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InitArgs &&...args)
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: _init(
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MakeIniter(
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std::forward<InitMethod>(init),
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std::forward<InitArgs>(args)...))
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, _content(this) {
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}
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