109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
#pragma once
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#include "modern-qt/utility/trait/widget.hh"
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#include "modern-qt/utility/wrapper/common.hh"
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#include "modern-qt/utility/wrapper/layout.hh"
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#include "modern-qt/utility/wrapper/property.hh"
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#include <qboxlayout.h>
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namespace creeper::linear::pro {
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using Token = common::Token<QBoxLayout>;
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struct SpacingItem : Token {
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int size;
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explicit SpacingItem(int p) { size = p; }
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void apply(QBoxLayout& self) const { self.addSpacing(size); }
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};
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struct Stretch : Token {
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int stretch;
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explicit Stretch(int p) { stretch = p; }
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void apply(QBoxLayout& self) const { self.addStretch(stretch); }
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};
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struct SpacerItem : Token {
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QSpacerItem* spacer_item;
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explicit SpacerItem(QSpacerItem* p) { spacer_item = p; }
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void apply(QBoxLayout& self) const { self.addSpacerItem(spacer_item); }
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};
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/// @brief
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/// 布局项包装器，用于声明式地将 Widget 或 Layout 添加到布局中
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///
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/// @tparam T
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/// 被包装的组件类型，需满足可转换为 QWidget* 或 QLayout*，不需
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/// 要显式指定，由构造参数推倒
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///
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/// @note
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/// Item 提供统一的接口用于在布局中插入控件或子布局，
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/// 支持多种构造方式，包括直接传入指针或通过参数构造新对象。
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/// 通过 LayoutMethod 可指定拉伸因子和对齐方式，
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/// 在布局应用时自动选择 addWidget 或 addLayout，
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/// 实现非侵入式的布局声明式封装。
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///
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/// 示例用途：
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/// linear::pro::Item<Widget> {
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/// { 0, Qt::AlignHCenter } // stretch, and alignment, optional
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/// ...
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/// };
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///
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template <item_trait T>
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struct Item : Token {
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struct LayoutMethod {
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int stretch = 0;
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Qt::Alignment align = {};
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} method;
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T* item_pointer = nullptr;
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explicit Item(const LayoutMethod& method, T* pointer) noexcept
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: item_pointer { pointer }
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, method { method } { }
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explicit Item(T* pointer) noexcept
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: item_pointer { pointer } { }
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explicit Item(const LayoutMethod& method, auto&&... args) noexcept
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requires std::constructible_from<T, decltype(args)...>
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: item_pointer { new T { std::forward<decltype(args)>(args)... } }
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, method(method) { }
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explicit Item(auto&&... args) noexcept
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requires std::constructible_from<T, decltype(args)...>
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: item_pointer { new T { std::forward<decltype(args)>(args)... } } { }
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void apply(linear_trait auto& layout) const {
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if constexpr (widget_trait<T>) layout.addWidget(item_pointer, method.stretch, method.align);
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if constexpr (layout_trait<T>) layout.addLayout(item_pointer, method.stretch);
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}
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};
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template <typename T>
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concept trait = std::derived_from<T, Token>;
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CREEPER_DEFINE_CHECKER(trait);
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using namespace layout::pro;
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}
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namespace creeper {
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template <class T>
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using BoxLayout = Declarative<T, CheckerOr<linear::pro::checker, layout::pro::checker>>;
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using Row = BoxLayout<QHBoxLayout>;
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using Col = BoxLayout<QVBoxLayout>;
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namespace row = linear;
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namespace col = linear;
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namespace internal {
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inline auto use_the_namespace_alias_to_eliminate_warnings() {
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std::ignore = row::pro::Token {};
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std::ignore = col::pro::Token {};
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}
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}
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}
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