Aegisub/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.
//
// $Id$
/// @file dialog_manager.h
/// @brief Manager for dialogs
/// @ingroup utility
#ifndef AGI_PRE
#include <map>
#include <typeinfo>
#include <wx/dialog.h>
#endif
#include "utils.h"
/// @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 {
/// Comparer for pointers to std::type_info
struct type_info_lt {
bool operator()(const std::type_info *lft, const std::type_info *rgt) const {
return !!lft->before(*rgt);
}
};
typedef std::map<const std::type_info *, wxDialog *, type_info_lt> DialogMap;
/// Dialogs which currently exist
DialogMap created_dialogs;
/// Close handler which deletes and unregisters closed modeless dialogs
void OnClose(wxCloseEvent &evt) {
evt.Skip();
wxDialog *dialog = static_cast<wxDialog*>(evt.GetEventObject());
dialog->Destroy();
for (DialogMap::iterator it = created_dialogs.begin(); it != created_dialogs.end(); ++it) {
if (it->second == dialog) {
created_dialogs.erase(it);
return;
}
}
}
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) {
DialogMap::iterator it = created_dialogs.find(&typeid(DialogType));
if (it != created_dialogs.end()) {
it->second->Show();
it->second->SetFocus();
}
else {
try {
wxDialog *d = new DialogType(c);
created_dialogs[&typeid(DialogType)] = d;
d->Bind(wxEVT_CLOSE_WINDOW, &DialogManager::OnClose, this);
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[&typeid(DialogType)] = &diag;
try {
diag.ShowModal();
}
catch (...) {
created_dialogs.erase(&typeid(DialogType));
throw;
}
created_dialogs.erase(&typeid(DialogType));
}
/// Get the dialog of the given type
/// @tparam DialogType Type of dialog to get
/// @return A pointer to a DialogType or NULL if no dialog of the given type has been created
template<class DialogType>
DialogType *Get() const {
DialogMap::const_iterator it = created_dialogs.find(&typeid(DialogType));
return it != created_dialogs.end() ? static_cast<DialogType*>(it->second) : 0;
}
~DialogManager() {
for (DialogMap::iterator it = created_dialogs.begin(); it != created_dialogs.end(); ++it) {
it->second->Unbind(wxEVT_CLOSE_WINDOW, &DialogManager::OnClose, this);
it->second->Destroy();
}
created_dialogs.clear();
}
};