Aegisub/src/dialog_manager.h

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// Copyright (c) 2012, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "utils.h"
#include <libaegisub/exception.h>
#include <vector>
#include <typeinfo>
#include <wx/dialog.h>
namespace agi { struct Context; }
/// @brief A manager for dialogs
///
/// DialogManager keeps track of modal and modeless dialogs which have been
/// created, so that commands can be send to the appropriate places and so that
/// the same dialog can't be opened twice at once.
class DialogManager {
using dialog_pair = std::pair<const std::type_info *, wxDialog *>;
/// Dialogs which currently exist
std::vector<dialog_pair> created_dialogs;
/// Close handler which deletes and unregisters closed modeless dialogs
template<typename Event>
void OnClose(Event &evt) {
evt.Skip();
auto dialog = static_cast<wxWindow *>(evt.GetEventObject());
while (!dialog->IsTopLevel()) dialog = dialog->GetParent();
dialog->Destroy();
for (auto it = created_dialogs.begin(); it != created_dialogs.end(); ++it) {
if (it->second == dialog) {
created_dialogs.erase(it);
return;
}
}
}
template<typename T>
std::vector<dialog_pair>::iterator Find() {
for (auto it = begin(created_dialogs); it != end(created_dialogs); ++it) {
if (*it->first == typeid(T))
return it;
}
return end(created_dialogs);
}
public:
/// Show a modeless dialog of the given type, creating it if needed
/// @tparam DialogType Type of dialog to show
template<class DialogType>
void Show(agi::Context *c) {
for (auto const& diag : created_dialogs) {
if (*diag.first == typeid(DialogType)) {
diag.second->Show();
diag.second->SetFocus();
}
}
try {
wxDialog *d = new DialogType(c);
created_dialogs.emplace_back(&typeid(DialogType), d);
d->Bind(wxEVT_CLOSE_WINDOW, &DialogManager::OnClose<wxCloseEvent>, this);
d->Bind(wxEVT_BUTTON, &DialogManager::OnClose<wxCommandEvent>, this, wxID_CANCEL);
d->Show();
SetFloatOnParent(d);
}
catch (agi::UserCancelException const&) { }
}
/// Show a modal dialog of the given type, creating it if needed
/// @tparam DialogType Type of dialog to show
template<class DialogType>
void ShowModal(agi::Context *c) {
DialogType diag(c);
created_dialogs.emplace_back(&typeid(DialogType), &diag);
try {
diag.ShowModal();
}
catch (...) {
created_dialogs.erase(Find<DialogType>());
throw;
}
created_dialogs.erase(Find<DialogType>());
}
/// Get the dialog of the given type
/// @tparam DialogType Type of dialog to get
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/// @return A pointer to a DialogType or nullptr if no dialog of the given type has been created
template<class DialogType>
DialogType *Get() const {
auto it = const_cast<DialogManager *>(this)->Find<DialogType>();
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return it != created_dialogs.end() ? static_cast<DialogType*>(it->second) : nullptr;
}
~DialogManager() {
for (auto const& it : created_dialogs) {
it.second->Unbind(wxEVT_CLOSE_WINDOW, &DialogManager::OnClose<wxCloseEvent>, this);
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it.second->Unbind(wxEVT_BUTTON, &DialogManager::OnClose<wxCommandEvent>, this, wxID_CANCEL);
it.second->Destroy();
}
}
};