u32 ReGBA_Menu(enum ReGBA_MenuEntryReason EntryReason)
{
SDL_PauseAudio(SDL_ENABLE);
ScaleModeUnapplied();
struct Menu* ActiveMenu = &MainMenu;
if (MainMenu.InitFunction != NULL)
(*(MainMenu.InitFunction))(&MainMenu);
while (ActiveMenu != NULL)
{
// Draw.
MenuFunction DisplayBackgroundFunction = ActiveMenu->DisplayBackgroundFunction;
if (DisplayBackgroundFunction == NULL) DisplayBackgroundFunction = DefaultDisplayBackgroundFunction;
(*DisplayBackgroundFunction)(ActiveMenu);
MenuFunction DisplayTitleFunction = ActiveMenu->DisplayTitleFunction;
if (DisplayTitleFunction == NULL) DisplayTitleFunction = DefaultDisplayTitleFunction;
(*DisplayTitleFunction)(ActiveMenu);
MenuEntryFunction DisplayDataFunction = ActiveMenu->DisplayDataFunction;
if (DisplayDataFunction == NULL) DisplayDataFunction = DefaultDisplayDataFunction;
(*DisplayDataFunction)(ActiveMenu, ActiveMenu->Entries[ActiveMenu->ActiveEntryIndex]);
SDL_Flip(OutputSurface);
// Wait. (This is for platforms on which flips don't wait for vertical
// sync.)
usleep(5000);
struct Menu* PreviousMenu = ActiveMenu;
// Get input.
enum GUI_Action Action = GetGUIAction();
switch (Action)
{
case GUI_ACTION_ENTER:
{
MenuModifyFunction ButtonEnterFunction = ActiveMenu->Entries[ActiveMenu->ActiveEntryIndex]->ButtonEnterFunction;
if (ButtonEnterFunction == NULL) ButtonEnterFunction = DefaultEnterFunction;
(*ButtonEnterFunction)(&ActiveMenu, &ActiveMenu->ActiveEntryIndex);
break;
}
case GUI_ACTION_LEAVE:
{
MenuModifyFunction ButtonLeaveFunction = ActiveMenu->ButtonLeaveFunction;
if (ButtonLeaveFunction == NULL) ButtonLeaveFunction = DefaultLeaveFunction;
(*ButtonLeaveFunction)(&ActiveMenu, &ActiveMenu->ActiveEntryIndex);
break;
}
case GUI_ACTION_UP:
{
MenuModifyFunction ButtonUpFunction = ActiveMenu->ButtonUpFunction;
if (ButtonUpFunction == NULL) ButtonUpFunction = DefaultUpFunction;
(*ButtonUpFunction)(&ActiveMenu, &ActiveMenu->ActiveEntryIndex);
break;
}
case GUI_ACTION_DOWN:
{
MenuModifyFunction ButtonDownFunction = ActiveMenu->ButtonDownFunction;
if (ButtonDownFunction == NULL) ButtonDownFunction = DefaultDownFunction;
(*ButtonDownFunction)(&ActiveMenu, &ActiveMenu->ActiveEntryIndex);
break;
}
case GUI_ACTION_LEFT:
{
MenuEntryFunction ButtonLeftFunction = ActiveMenu->Entries[ActiveMenu->ActiveEntryIndex]->ButtonLeftFunction;
if (ButtonLeftFunction == NULL) ButtonLeftFunction = DefaultLeftFunction;
(*ButtonLeftFunction)(ActiveMenu, ActiveMenu->Entries[ActiveMenu->ActiveEntryIndex]);
break;
}
case GUI_ACTION_RIGHT:
{
MenuEntryFunction ButtonRightFunction = ActiveMenu->Entries[ActiveMenu->ActiveEntryIndex]->ButtonRightFunction;
if (ButtonRightFunction == NULL) ButtonRightFunction = DefaultRightFunction;
(*ButtonRightFunction)(ActiveMenu, ActiveMenu->Entries[ActiveMenu->ActiveEntryIndex]);
break;
}
default:
break;
}
// Possibly finalise this menu and activate and initialise a new one.
if (ActiveMenu != PreviousMenu)
{
if (PreviousMenu->EndFunction != NULL)
(*(PreviousMenu->EndFunction))(PreviousMenu);
if (ActiveMenu != NULL && ActiveMenu->InitFunction != NULL)
(*(ActiveMenu->InitFunction))(ActiveMenu);
}
}
// Avoid leaving the menu with GBA keys pressed (namely the one bound to
// the native exit button, B).
while (ReGBA_GetPressedButtons() != 0)
{
// Draw.
SDL_Flip(OutputSurface);
// Wait. (This is for platforms on which flips don't wait for vertical
// sync.)
usleep(5000);
}
SDL_PauseAudio(SDL_DISABLE);
StatsStopFPS();
timespec Now;
clock_gettime(CLOCK_MONOTONIC, &Now);
Stats.LastFPSCalculationTime = Now;
return 0;
}
void StatsInit(void)
{
StatsStopFPS();
}