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Diffstat (limited to 'wx+/key_event.h')
| -rw-r--r-- | wx+/key_event.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/wx+/key_event.h b/wx+/key_event.h deleted file mode 100644 index aa094b4a..00000000 --- a/wx+/key_event.h +++ /dev/null @@ -1,118 +0,0 @@ -// ************************************************************************** -// * This file is part of the FreeFileSync project. It is distributed under * -// * GNU General Public License: http://www.gnu.org/licenses/gpl.html * -// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved * -// ************************************************************************** - -#ifndef KEY_EVENT_H_086130871086708354674 -#define KEY_EVENT_H_086130871086708354674 - -#include <functional> -#include <zen/scope_guard.h> -#include <wx/toplevel.h> -#include <wx/window.h> -#include <wx/event.h> - -namespace zen -{ -//wxWidgets provides no elegant way to register shortcut keys scoped for dialog windows -// => enable dialog-specific local key events! - -//setup in wxDialog-derived class' constructor, e.g.: -// setupLocalKeyEvents(*this, [this](wxKeyEvent& event){ this->onLocalKeyEvent(event); }); -// -// => redirects local key events to: -// void MyDlg::onLocalKeyEvent(wxKeyEvent& event); -void setupLocalKeyEvents(wxWindow& wnd, const std::function<void(wxKeyEvent& event)>& callback); //callback held during life time of "wnd"! - - - - - - - -//pretty much the same like "bool wxWindowBase::IsDescendant(wxWindowBase* child) const" but without the obvious misnomer -inline -bool isComponentOf(const wxWindow* child, const wxWindow* top) -{ - for (const wxWindow* wnd = child; wnd != nullptr; wnd = wnd->GetParent()) - if (wnd == top) - return true; - return false; -} - - -namespace impl -{ -inline -const wxTopLevelWindow* getTopLevelWindow(const wxWindow* child) -{ - for (const wxWindow* wnd = child; wnd != nullptr; wnd = wnd->GetParent()) - if (auto tlw = dynamic_cast<const wxTopLevelWindow*>(wnd)) - return tlw; - return nullptr; -} - - -class LokalKeyEventHandler : public wxWindow //private wxEvtHandler -{ -public: - LokalKeyEventHandler(wxWindow& parent, const std::function<void(wxKeyEvent& event)>& callback) : wxWindow(&parent, wxID_ANY), //use a dummy child window to bind instance life time to parent - parent_(parent), - callback_(callback), - processingCallback(false) - { - Hide(); //this is just a dummy window so that its parent can have ownership - Disable(); // - - //register global hotkeys (without needing explicit menu entry) - wxTheApp->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(LokalKeyEventHandler::onGlobalKeyEvent), nullptr, this); - wxTheApp->Connect(wxEVT_CHAR_HOOK, wxKeyEventHandler(LokalKeyEventHandler::onGlobalKeyEvent), nullptr, this); //capture direction keys - } - - ~LokalKeyEventHandler() - { - //important! event source wxTheApp lives longer than this instance -> disconnect! - wxTheApp->Disconnect(wxEVT_KEY_DOWN, wxKeyEventHandler(LokalKeyEventHandler::onGlobalKeyEvent), nullptr, this); - wxTheApp->Disconnect(wxEVT_CHAR_HOOK, wxKeyEventHandler(LokalKeyEventHandler::onGlobalKeyEvent), nullptr, this); - } - -private: - void onGlobalKeyEvent(wxKeyEvent& event) - { - const wxWindow* focus = wxWindow::FindFocus(); - const wxTopLevelWindow* tlw = getTopLevelWindow(&parent_); - - //avoid recursion!!! -> this ugly construct seems to be the only (portable) way to avoid re-entrancy - //recursion may happen in multiple situations: e.g. modal dialogs, Grid::ProcessEvent()! - if (processingCallback || - !isComponentOf(focus, &parent_) || - !parent_.IsEnabled() || //only handle if window is in use and no modal dialog is shown: - !tlw || !const_cast<wxTopLevelWindow*>(tlw)->IsActive()) //thanks to wxWidgets non-portability we need both checks: - //IsEnabled() is sufficient for Windows, IsActive() is needed on OS X since it does NOT disable the parent when showing a modal dialog - { - event.Skip(); - return; - } - processingCallback = true; - ZEN_ON_SCOPE_EXIT(processingCallback = false;) - - callback_(event); - } - - wxWindow& parent_; - const std::function<void(wxKeyEvent& event)> callback_; - bool processingCallback; -}; -} - - -inline -void setupLocalKeyEvents(wxWindow& wnd, const std::function<void(wxKeyEvent& event)>& callback) -{ - new impl::LokalKeyEventHandler(wnd, callback); //ownership passed to "wnd"! -} - -} - -#endif //KEY_EVENT_H_086130871086708354674 |