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Merge pull request #143 from rmpowell77/dev/generic_proxy
Issue #142: Generic needs a proxy
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| /* | ||
| MIT License | ||
| Copyright (c) 2022 Richard Powell | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ | ||
| #pragma once | ||
|
|
||
| #include <optional> | ||
| #include <wx/sizer.h> | ||
|
|
||
| namespace wxUI::details { | ||
|
|
||
| // https://stackoverflow.com/questions/27866909/get-function-arity-from-template-parameter | ||
| template <typename T> | ||
| constexpr bool noarg_callable_impl( | ||
| typename std::enable_if<bool(sizeof((std::declval<T>()(), 0)))>::type*) | ||
| { | ||
| return true; | ||
| } | ||
|
|
||
| template <typename T> | ||
| constexpr bool noarg_callable_impl(...) | ||
| { | ||
| return false; | ||
| } | ||
|
|
||
| template <typename T> | ||
| constexpr bool is_noarg_callable() | ||
| { | ||
| return noarg_callable_impl<T>(nullptr); | ||
| } | ||
|
|
||
| // BindInfo uses type erase to allow any binding for any Event type. | ||
| struct BindInfo { | ||
|
|
||
| void bindTo([[maybe_unused]] wxWindow* widget) const | ||
| { | ||
| mInfo->bindTo(widget); | ||
| } | ||
|
|
||
| template <typename Event, typename Function> | ||
| BindInfo([[maybe_unused]] Event event, [[maybe_unused]] Function function) | ||
| : mInfo(std::make_unique<BindInfoDetails<Event, Function>>(event, function)) | ||
| { | ||
| } | ||
|
|
||
| ~BindInfo() = default; | ||
|
|
||
| BindInfo(BindInfo const& bindInfo) | ||
| : mInfo(bindInfo.mInfo->clone()) | ||
| { | ||
| } | ||
|
|
||
| auto operator=(BindInfo const& bindInfo) -> BindInfo& | ||
| { | ||
| if (this == &bindInfo) { | ||
| return *this; | ||
| } | ||
| mInfo = bindInfo.mInfo->clone(); | ||
| return *this; | ||
| } | ||
|
|
||
| BindInfo(BindInfo&& bindInfo) noexcept | ||
| : mInfo(std::move(bindInfo.mInfo)) | ||
| { | ||
| } | ||
|
|
||
| auto operator=(BindInfo&& bindInfo) noexcept -> BindInfo& | ||
| { | ||
| mInfo = std::move(bindInfo.mInfo); | ||
| return *this; | ||
| } | ||
|
|
||
| private: | ||
| struct BindInfoDetailsBase { | ||
| virtual ~BindInfoDetailsBase() = default; | ||
| virtual void bindTo(wxWindow* widget) const = 0; | ||
| [[nodiscard]] virtual auto clone() const -> std::unique_ptr<BindInfoDetailsBase> = 0; | ||
| }; | ||
|
|
||
| template <typename Event, typename Function> | ||
| struct BindInfoDetails : BindInfoDetailsBase { | ||
| BindInfoDetails(Event event, Function function) | ||
| : event(event) | ||
| , function(function) | ||
| { | ||
| } | ||
| Event event; | ||
| Function function; | ||
| void bindTo(wxWindow* widget) const override | ||
| { | ||
| widget->Bind(event, function); | ||
| } | ||
| [[nodiscard]] auto clone() const -> std::unique_ptr<BindInfoDetailsBase> override | ||
| { | ||
| return std::make_unique<BindInfoDetails>(event, function); | ||
| } | ||
| }; | ||
|
|
||
| std::unique_ptr<BindInfoDetailsBase> mInfo; | ||
| }; | ||
|
|
||
| static_assert(std::is_nothrow_move_constructible_v<BindInfo>); | ||
| static_assert(std::is_nothrow_move_assignable_v<BindInfo>); | ||
|
|
||
| } |
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