Method updateSelector

switch/source/MainScreen.cpp:721–783

}

void MainScreen::updateSelector(const InputState& input)
{
    // Hiding/showing titles from Settings bumps the catalog generation and can
    // shrink the filtered list under the cursor. Clamp the index and drop the
    // selection before anything reads them, so backup/restore can't fall back to
    // targeting the first (wrong) title.
    const u32 gen = TitleCatalog::get().generation();
    if (gen != mLastGeneration) {
        mLastGeneration    = gen;
        const size_t count = TitleCatalog::get().getFilteredTitleCount(g_currentUId, mSaveTypeFilter);
        if (mCursor >= count) {
            mCursor = count > 0 ? count - 1 : 0;
        }
        scrollToCursor(count); // fewer rows may remain than the window showed
        MS::clearSelectedEntries();
    }

    if (!backupScrollEnabled) {
        size_t count = TitleCatalog::get().getFilteredTitleCount(g_currentUId, mSaveTypeFilter);
        if (sidebarFocused && (input.kDown & (HidNpadButton_Right | HidNpadButton_B))) {
            sidebarFocused   = false;
            sidebarExitFrame = true;
        }
        else if (sidebarFocused) {
            // don't update title grid while sidebar is focused
        }
        else if (sidebarExitFrame) {
            // skip grid-cursor updates until Right/B is released so the held key doesn't move the title cursor
            if (!(input.kHeld & (HidNpadButton_AnyRight | HidNpadButton_B))) {
                sidebarExitFrame = false;
            }
        }
        else if ((input.kDown & HidNpadButton_Left) && mCursor % GRID_COLS == 0) {
            sidebarFocused = true;
            sidebarCursor  = static_cast<int>(mSaveTypeFilter);
        }
        else {
            updateGridCursor(input, count);
        }

        // Touch selection over the visible tiles (including the faded partial
        // row — tapping it selects the tile and scrolls it into full view).
        if (input.touch.count > 0) {
            const size_t visBegin = (size_t)mScrollRow * GRID_COLS;
            const size_t visEnd   = std::min(count, visBegin + (size_t)(GRID_COLS * GRID_DRAW_ROWS));
            for (size_t k = visBegin; k < visEnd; k++) {
                const int x = selectorX(k);
                const int y = selectorY(k);
                if (input.touch.touches[0].x >= x && input.touch.touches[0].x <= x + TILE && input.touch.touches[0].y >= y &&
                    input.touch.touches[0].y <= y + TILE && input.touch.touches[0].y < GRID_BOTTOM) {
                    mCursor = k;
                    scrollToCursor(count);
                    break;
                }
            }
        }

        backupList->resetIndex();