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Fix wxNotebook event incontinence
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parent
19c47afb7b
commit
18c95c404c
2 changed files with 72 additions and 27 deletions
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@ -1,7 +1,7 @@
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#ifndef slic3r_GUI_Utils_hpp_
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#define slic3r_GUI_Utils_hpp_
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#include <functional>
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#include <memory>
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#include <string>
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#include <boost/optional.hpp>
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@ -10,6 +10,7 @@
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#include <wx/filedlg.h>
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#include <wx/gdicmn.h>
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#include <wx/panel.h>
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#include <wx/debug.h>
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class wxCheckBox;
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class wxTopLevelWindow;
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@ -25,40 +26,80 @@ wxTopLevelWindow* find_toplevel_parent(wxWindow *window);
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class EventGuard
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{
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// This is a RAII-style smart-ptr-like guard that will bind any event to any event handler
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// and unbind it as soon as it goes out of scope or unbind() is called.
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// This can be used to solve the annoying problem of wx events being delivered to freed objects.
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private:
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// This is a way to type-erase both the event type as well as the handler:
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struct EventStorageBase {
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virtual ~EventStorageBase() {}
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};
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template<class EvTag, class Fun>
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struct EventStorageFun : EventStorageBase {
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wxEvtHandler *emitter;
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EvTag tag;
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Fun fun;
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EventStorageFun(wxEvtHandler *emitter, const EvTag &tag, Fun fun)
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: emitter(emitter)
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, tag(tag)
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, fun(std::move(fun))
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{
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emitter->Bind(this->tag, this->fun);
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}
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virtual ~EventStorageFun() { emitter->Unbind(tag, fun); }
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};
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template<typename EvTag, typename Class, typename EvArg, typename EvHandler>
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struct EventStorageMethod : EventStorageBase {
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typedef void(Class::* MethodPtr)(EvArg &);
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wxEvtHandler *emitter;
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EvTag tag;
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MethodPtr method;
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EvHandler *handler;
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EventStorageMethod(wxEvtHandler *emitter, const EvTag &tag, MethodPtr method, EvHandler *handler)
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: emitter(emitter)
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, tag(tag)
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, method(method)
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, handler(handler)
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{
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emitter->Bind(tag, method, handler);
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}
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virtual ~EventStorageMethod() { emitter->Unbind(tag, method, handler); }
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};
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std::unique_ptr<EventStorageBase> event_storage;
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public:
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EventGuard() {}
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EventGuard(const EventGuard&) = delete;
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EventGuard(EventGuard &&other) : unbinder(std::move(other.unbinder)) {}
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EventGuard(EventGuard &&other) : event_storage(std::move(other.event_storage)) {}
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~EventGuard() {
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if (unbinder) {
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unbinder(false);
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}
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}
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template<class EvTag, class Fun>
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EventGuard(wxEvtHandler *emitter, const EvTag &tag, Fun fun)
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:event_storage(new EventStorageFun<EvTag, Fun>(emitter, tag, std::move(fun)))
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{}
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template<class EvTag, class Fun> void bind(wxEvtHandler *emitter, const EvTag &type, Fun fun)
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{
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// This is a way to type-erase both the event type as well as the handler:
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unbinder = std::move([=](bool bind) {
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if (bind) {
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emitter->Bind(type, fun);
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} else {
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emitter->Unbind(type, fun);
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}
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});
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unbinder(true);
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}
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template<typename EvTag, typename Class, typename EvArg, typename EvHandler>
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EventGuard(wxEvtHandler *emitter, const EvTag &tag, void(Class::* method)(EvArg &), EvHandler *handler)
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:event_storage(new EventStorageMethod<EvTag, Class, EvArg, EvHandler>(emitter, tag, method, handler))
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{}
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EventGuard& operator=(const EventGuard&) = delete;
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EventGuard& operator=(EventGuard &&other)
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{
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unbinder.swap(other.unbinder);
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event_storage = std::move(other.event_storage);
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return *this;
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}
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private:
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std::function<void(bool)> unbinder;
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void unbind() { event_storage.reset(nullptr); }
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explicit operator bool() const noexcept { return !!event_storage; }
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};
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