Tutorial: Show EVs and IVs in Summary Screen

Show EVs and IVs in Summary Screen

Author: RavePossum

It would be handy for the player if they could check their Pokemon's EVs and IVs directly from the summary screen. Let's allow the player to switch between stat types by pressing A on the skills page of the summary screen.

Retrieve EV and IV information

First, we'll add some new members to the PokemonSummaryMonData struct and populate them with EV/IV information. Head over to src/applications/pokemon_summary_screen/main.h, and add the following in the aforementioned struct definition:

    u16 spAttack;
    u16 spDefense;
    u16 speed;

+   u16 evHP;
+   u16 evAttack;
+   u16 evDefense;
+   u16 evSpAttack;
+   u16 evSpDefense;
+   u16 evSpeed;
+
+   u16 ivHP;
+   u16 ivAttack;
+   u16 ivDefense;
+   u16 ivSpAttack;
+   u16 ivSpDefense;
+   u16 ivSpeed;
+
    u8 ability;
    u8 nature;

We'll also need a way for the summary screen to track which set of stats to show. Let's add a member to the PokemonSummaryScreen struct for this:

    u8 ribbonRow;
    u8 ribbonMax;
    u8 ribbonID;

+   u8 skillsState;
} PokemonSummaryScreen;

BOOL PokemonSummaryScreen_ShowContestData(SaveData *saveData);

While we're here, we'll also want to add an enumeration somewhere to represent the current state of the stats being shown on the skills page:

    MAX_CONDITION_RECT
};

+ enum SkillsState {
+   SKILLS_STATE_STATS = 0,
+   SKILLS_STATE_EVS,
+   SKILLS_STATE_IVS,
+   MAX_SKILLS_STATE,
+ };

#define SUMMARY_SUBSCREEN_BUTTON_NONE 0xFF

Finally, we'll need to actually retrieve the relevant info while the summary screen populates the data for the Pokemon in the SetMonDataFromMon() function in src/applications/pokemon_summary_screen/main.c.

    monData->ability = Pokemon_GetValue(mon, MON_DATA_ABILITY, NULL);
    monData->nature = Pokemon_GetNature(mon);

+   monData->evHP = Pokemon_GetValue(mon, MON_DATA_HP_EV, NULL);
+   monData->evAttack = Pokemon_GetValue(mon, MON_DATA_ATK_EV, NULL);
+   monData->evDefense = Pokemon_GetValue(mon, MON_DATA_DEF_EV, NULL);
+   monData->evSpAttack = Pokemon_GetValue(mon, MON_DATA_SPATK_EV, NULL);
+   monData->evSpDefense = Pokemon_GetValue(mon, MON_DATA_SPDEF_EV, NULL);
+   monData->evSpeed = Pokemon_GetValue(mon, MON_DATA_SPEED_EV, NULL);
+
+   monData->ivHP = Pokemon_GetValue(mon, MON_DATA_HP_IV, NULL);
+   monData->ivAttack = Pokemon_GetValue(mon, MON_DATA_ATK_IV, NULL);
+   monData->ivDefense = Pokemon_GetValue(mon, MON_DATA_DEF_IV, NULL);
+   monData->ivSpAttack = Pokemon_GetValue(mon, MON_DATA_SPATK_IV, NULL);
+   monData->ivSpDefense = Pokemon_GetValue(mon, MON_DATA_SPDEF_IV, NULL);
+   monData->ivSpeed = Pokemon_GetValue(mon, MON_DATA_SPEED_IV, NULL);
+
    u16 i;
    u8 maxPP;
    for (i = 0; i < LEARNED_MOVES_MAX; i++) {

Add New Text Strings To Summary Screen Bank

In order for the player to know which stats are currently shown, we'll need to display their name next to the button prompt at the top of the screen. We'll need to add some relevant strings to the end of the text bank in res/text/pokemon_summary_screen.json:

    {
      "id": "PokemonSummary_Text_RibbonMaxNumber",
      "en_US": "{STRVAR_1 52, 0, 0}"
+   },
+   {
+     "id": "PokemonSummary_Text_EVs",
+     "en_US": "EVs"
+   },
+   {
+     "id": "PokemonSummary_Text_IVs",
+     "en_US": "IVs"
+   },
+   {
+     "id": "PokemonSummary_Text_Stats",
+     "en_US": "Stats"
+   }
  ]
}

Show the A Button on the Skills Page

We'll tell the player they can press the A button to switch between skills type by showing it in the prompt at the top. We'll also want to go ahead and print the first default text string - "Stats". We'll just add a couple function calls to DrawSkillsPageWindows() in src/applications/pokemon_summary_screen/window.c:

    MessageLoader_Free(msgLoader);
    PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_ABILITY_DESCRIPTION], SUMMARY_TEXT_BLACK, ALIGN_LEFT);

+   PokemonSummaryScreen_ClearAndPrintButtonPrompt(summaryScreen, PokemonSummary_Text_Stats);
+   PokemonSummaryScreen_UpdateAButtonSprite(summaryScreen, &summaryScreen->staticWindows[SUMMARY_WINDOW_BUTTON_PROMPT]);

    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_HP]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_ATTACK]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_DEFENSE]);

Reset Default States

We should also reset the skills state to the default any time the player changes pages or Pokemon.

In the SetupPageFromSubscreenButton() function in src/applications/pokemon_summary_screen/main.c:

        ClearMoveInfoWindows(summaryScreen);
    }

+   // reset skills state when switching pages
+   if (summaryScreen->page == SUMMARY_PAGE_SKILLS) {
+       summaryScreen->skillsState = SKILLS_STATE_STATS;
+   }

    PokemonSummaryScreen_RemoveExtraWindows(summaryScreen);
    summaryScreen->page = page;
    PokemonSummaryScreen_UpdateAButtonSprite(summaryScreen, NULL);

And in the ChangeSummaryMon() function in the same file:

    if (summaryScreen->page == SUMMARY_PAGE_INFO) {
        DrawExperienceProgressBar(summaryScreen);
    } else if (summaryScreen->page == SUMMARY_PAGE_SKILLS) {
+       // reset skills state when changing mons
+       summaryScreen->skillsState = SKILLS_STATE_STATS;
        DrawHealthBar(summaryScreen);
    } else if (summaryScreen->page == SUMMARY_PAGE_CONDITION) {
        PokemonSummaryScreen_InitMaxAndDeltaConditionRects(summaryScreen);

Add a Function To Print Different Kinds of Stats

When the player presses the A button, we'll need to redraw all of the skills with the correct stat type. Let's add the following function that reprints the correct stats based on the current state anywhere in src/applications/pokemon_summary_screen/window.c:

void PokemonSummaryScreen_PrintSkillsForCurrentState(PokemonSummaryScreen *summaryScreen)
{
    Window_FillTilemap(&summaryScreen->extraWindows[SUMMARY_WINDOW_HP], 0);
    Window_FillTilemap(&summaryScreen->extraWindows[SUMMARY_WINDOW_ATTACK], 0);
    Window_FillTilemap(&summaryScreen->extraWindows[SUMMARY_WINDOW_DEFENSE], 0);
    Window_FillTilemap(&summaryScreen->extraWindows[SUMMARY_WINDOW_SP_ATTACK], 0);
    Window_FillTilemap(&summaryScreen->extraWindows[SUMMARY_WINDOW_SP_DEFENSE], 0);
    Window_FillTilemap(&summaryScreen->extraWindows[SUMMARY_WINDOW_SPEED], 0);

    switch (summaryScreen->skillsState) {
    case SKILLS_STATE_EVS:
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateAttack, summaryScreen->monData.evHP, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_HP], SUMMARY_TEXT_BLACK, ALIGN_CENTER);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateAttack, summaryScreen->monData.evAttack, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_ATTACK], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateDefense, summaryScreen->monData.evDefense, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_DEFENSE], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpAttack, summaryScreen->monData.evSpAttack, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SP_ATTACK], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpDefense, summaryScreen->monData.evSpDefense, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SP_DEFENSE], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpeed, summaryScreen->monData.evSpeed, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SPEED], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        break;
    case SKILLS_STATE_IVS:
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateAttack, summaryScreen->monData.ivHP, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_HP], SUMMARY_TEXT_BLACK, ALIGN_CENTER);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateAttack, summaryScreen->monData.ivAttack, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_ATTACK], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateDefense, summaryScreen->monData.ivDefense, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_DEFENSE], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpAttack, summaryScreen->monData.ivSpAttack, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SP_ATTACK], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpDefense, summaryScreen->monData.ivSpDefense, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SP_DEFENSE], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpeed, summaryScreen->monData.ivSpeed, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SPEED], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        break;
    case SKILLS_STATE_STATS:
        u32 hpWindowWidth = Window_GetWidth(&summaryScreen->extraWindows[SUMMARY_WINDOW_HP]) * 8;

        PrintCurrentAndMaxInfo(summaryScreen, 0, PokemonSummary_Text_Slash, PokemonSummary_Text_TemplateCurrentHp, PokemonSummary_Text_TemplateMaxHp, summaryScreen->monData.curHP, summaryScreen->monData.maxHP, 3, hpWindowWidth / 2, 0);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateAttack, summaryScreen->monData.attack, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_ATTACK], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateDefense, summaryScreen->monData.defense, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_DEFENSE], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpAttack, summaryScreen->monData.spAttack, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SP_ATTACK], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpDefense, summaryScreen->monData.spDefense, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SP_DEFENSE], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        SetAndFormatNumberBuf(summaryScreen, PokemonSummary_Text_TemplateSpeed, summaryScreen->monData.speed, 3, PADDING_MODE_NONE);
        PrintStringToWindow(summaryScreen, &summaryScreen->extraWindows[SUMMARY_WINDOW_SPEED], SUMMARY_TEXT_BLACK, ALIGN_RIGHT);
        break;
    }

    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_HP]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_ATTACK]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_DEFENSE]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_SP_ATTACK]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_SP_DEFENSE]);
    Window_ScheduleCopyToVRAM(&summaryScreen->extraWindows[SUMMARY_WINDOW_SPEED]);
}

And don't forget to add a declaration for it in src/applications/pokemon_summary_screen/window.h:

void PokemonSummaryScreen_PrintContestMoveAttributes(PokemonSummaryScreen *summaryScreen, u32 move);
void PokemonSummaryScreen_ClearContestAttributeWindows(PokemonSummaryScreen *summaryScreen);
void PokemonSummaryScreen_PrintPoffinFeedMsg(PokemonSummaryScreen *summaryScreen, enum SummaryPoffinFeedMsg msg);
+ void PokemonSummaryScreen_PrintSkillsForCurrentState(PokemonSummaryScreen *summaryScreen);

#endif // POKEPLATINUM_POKEMON_SUMMARY_SCREEN_WINDOW_H

Handle the Player Pressing A

Finally, we'll just need to add handling for when the player actually presses A. Add the following function somehwere in src/applications/pokemon_summary_screen/main.c

static void CycleSkillsState(PokemonSummaryScreen *summaryScreen)
{
    summaryScreen->skillsState++;
    if (summaryScreen->skillsState == MAX_SKILLS_STATE) {
        summaryScreen->skillsState = SKILLS_STATE_STATS;
    }

    switch (summaryScreen->skillsState) {
    case SKILLS_STATE_EVS:
        PokemonSummaryScreen_ClearAndPrintButtonPrompt(summaryScreen, PokemonSummary_Text_EVs);
        break;
    case SKILLS_STATE_IVS:
        PokemonSummaryScreen_ClearAndPrintButtonPrompt(summaryScreen, PokemonSummary_Text_IVs);
        break;
    case SKILLS_STATE_STATS:
        PokemonSummaryScreen_ClearAndPrintButtonPrompt(summaryScreen, PokemonSummary_Text_Stats);
        break;
    }

    PokemonSummaryScreen_PrintSkillsForCurrentState(summaryScreen);
}

And add a forward declaration for it with the rest near the top of the file:

static u8 HideRibbonInfo(PokemonSummaryScreen *summaryScreen);
static void ChangeSelectedRibbon(PokemonSummaryScreen *summaryScreen, s8 delta);
static int TryFeedPoffin(PokemonSummaryScreen *summaryScreen);
+ static void CycleSkillsState(PokemonSummaryScreen *summaryScreen);

const ApplicationManagerTemplate gPokemonSummaryScreenApp = {
    PokemonSummaryScreen_Init,

Lastly, let's handle the player pressing the A button and call it in HandleInput_Main() in the same file:

    if (JOY_NEW(PAD_BUTTON_A)) {
        if (summaryScreen->data->mode == SUMMARY_MODE_FEED_POFFIN && summaryScreen->page == SUMMARY_MODE_SHOW_CONDITION_CHANGE) {
            Sound_PlayEffect(SEQ_SE_DP_DECIDE);
            return TryFeedPoffin(summaryScreen);
        }

...

        } else if (summaryScreen->page == SUMMARY_PAGE_EXIT) {
            Sound_PlayEffect(SEQ_SE_DP_DECIDE);
            summaryScreen->data->returnMode = SUMMARY_RETURN_CANCEL;
            return SUMMARY_STATE_TRANSITION_OUT;
+       } else if (summaryScreen->page == SUMMARY_PAGE_SKILLS) {
+           Sound_PlayEffect(SEQ_SE_DP_SYU01);
+           CycleSkillsState(summaryScreen);
+           return SUMMARY_STATE_HANDLE_INPUT;
        }
    }

    if (CheckSubscreenPressAndSetButton(summaryScreen) == TRUE) {

All finished! It should look like so:

summary-evs-ivs.mp4