105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/modalhook.h
|
|
// Purpose: Allows to hook into showing modal dialogs.
|
|
// Author: Vadim Zeitlin
|
|
// Created: 2013-05-19
|
|
// Copyright: (c) 2013 Vadim Zeitlin <vadim@wxwidgets.org>
|
|
// Licence: wxWindows licence
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_MODALHOOK_H_
|
|
#define _WX_MODALHOOK_H_
|
|
|
|
#include "wx/vector.h"
|
|
|
|
class WXDLLIMPEXP_FWD_CORE wxDialog;
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Class allowing to be notified about any modal dialog calls.
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// To be notified about entering and exiting modal dialogs and possibly to
|
|
// replace them with something else (e.g. just return a predefined value for
|
|
// testing), define an object of this class, override its Enter() and
|
|
// possibly Exit() methods and call Register() on it.
|
|
class WXDLLIMPEXP_CORE wxModalDialogHook
|
|
{
|
|
public:
|
|
// Default ctor doesn't do anything, call Register() to activate the hook.
|
|
wxModalDialogHook() { }
|
|
|
|
// Dtor unregisters the hook if it had been registered.
|
|
virtual ~wxModalDialogHook() { DoUnregister(); }
|
|
|
|
// Register this hook as being active, i.e. its Enter() and Exit() methods
|
|
// will be called.
|
|
//
|
|
// Notice that the order of registration matters: the last hook registered
|
|
// is called first, and if its Enter() returns something != wxID_NONE, the
|
|
// subsequent hooks are skipped.
|
|
void Register();
|
|
|
|
// Unregister this hook. Notice that is done automatically from the dtor.
|
|
void Unregister();
|
|
|
|
// Called from wxWidgets code before showing any modal dialogs and calls
|
|
// Enter() for every registered hook.
|
|
static int CallEnter(wxDialog* dialog);
|
|
|
|
// Called from wxWidgets code after dismissing the dialog and calls Exit()
|
|
// for every registered hook.
|
|
static void CallExit(wxDialog* dialog);
|
|
|
|
protected:
|
|
// Called by wxWidgets before showing any modal dialogs, override this to
|
|
// be notified about this and return anything but wxID_NONE to skip showing
|
|
// the modal dialog entirely and just return the specified result.
|
|
virtual int Enter(wxDialog* dialog) = 0;
|
|
|
|
// Called by wxWidgets after dismissing the modal dialog. Notice that it
|
|
// won't be called if Enter() hadn't been.
|
|
virtual void Exit(wxDialog* WXUNUSED(dialog)) { }
|
|
|
|
private:
|
|
// Unregister the given hook, return true if it was done or false if the
|
|
// hook wasn't found.
|
|
bool DoUnregister();
|
|
|
|
// All the hooks in reverse registration order (i.e. in call order).
|
|
typedef wxVector<wxModalDialogHook*> Hooks;
|
|
static Hooks ms_hooks;
|
|
|
|
wxDECLARE_NO_COPY_CLASS(wxModalDialogHook);
|
|
};
|
|
|
|
// Helper object used by WX_MODAL_DIALOG_HOOK below to ensure that CallExit()
|
|
// is called on scope exit.
|
|
class wxModalDialogHookExitGuard
|
|
{
|
|
public:
|
|
explicit wxModalDialogHookExitGuard(wxDialog* dialog)
|
|
: m_dialog(dialog)
|
|
{
|
|
}
|
|
|
|
~wxModalDialogHookExitGuard()
|
|
{
|
|
wxModalDialogHook::CallExit(m_dialog);
|
|
}
|
|
|
|
private:
|
|
wxDialog* const m_dialog;
|
|
|
|
wxDECLARE_NO_COPY_CLASS(wxModalDialogHookExitGuard);
|
|
};
|
|
|
|
// This macro needs to be used at the top of every implementation of
|
|
// ShowModal() in order for wxModalDialogHook to work.
|
|
#define WX_HOOK_MODAL_DIALOG() \
|
|
const int modalDialogHookRC = wxModalDialogHook::CallEnter(this); \
|
|
if ( modalDialogHookRC != wxID_NONE ) \
|
|
return modalDialogHookRC; \
|
|
wxModalDialogHookExitGuard modalDialogHookExit(this)
|
|
|
|
#endif // _WX_MODALHOOK_H_
|