handlers.cpp

// Handlers module — hit detection and button click handlers

#include "handlers.h"

// =====================================================================
// Hit detection
// =====================================================================
bool in_rect(int mx, int my, int x1, int y1, int x2, int y2) {
    return mx >= x1 && mx <= x2 && my >= y1 && my <= y2;
}

bool is_actionable_region(int mx, int my) {
    // Control panel buttons
    if (in_rect(mx,my, 595,426, 610,442)) return true;  // Fire+
    if (in_rect(mx,my, 455,426, 470,442)) return true;  // Fire-
    if (in_rect(mx,my, 595,362, 610,379)) return true;  // Air+
    if (in_rect(mx,my, 455,362, 470,379)) return true;  // Air-
    if (in_rect(mx,my, 448,256, 455,275)) return true;  // Valve water in
    if (in_rect(mx,my, 558,256, 568,276)) return true;  // Valve water out
    if (in_rect(mx,my, 513,310, 525,319)) return true;  // Stove open
    if (in_rect(mx,my, 536,310, 547,319)) return true;  // Stove close
    if (in_rect(mx,my, 377,216, 424,232)) return true;  // ESC
    if (in_rect(mx,my, 518,216, 566,232)) return true;  // HELP
    if (in_rect(mx,my, 432,216, 508,232)) return true;  // CTRL
    if (in_rect(mx,my, 605,195, 618,207)) return true;  // ?
    if (in_rect(mx,my, 575,216, 597,232)) return true;  // Language toggle
    // Diagram elements — direct-click on valves, stove door, open/close buttons
    if (in_rect(mx,my, 40,178, 70,195))   return true;  // Valve 1 (on pipe-in)
    if (in_rect(mx,my, 225,255, 255,272)) return true;  // Valve 2 (on pipe-out)
    if (in_rect(mx,my, 120,365, 170,405)) return true;  // Stove door
    if (in_rect(mx,my, 60,360, 92,378))   return true;  // Open stove button (on diagram)
    if (in_rect(mx,my, 210,360, 250,378)) return true;  // Close stove button (on diagram)
    return false;
}

// =====================================================================
// Button click handlers
// =====================================================================
void handle_fire_plus() {
    if (stove_open == 1) {
        Sound(1000);
        int slider_x = 475 + 3 + ii*5 - jj*5;
        if (slider_x >= 475+3 && slider_x < 475+109) {
            setfillstyle(1,1);
            bar(slider_x, 439+3-11, slider_x+3, 439+12-11);
        }
        if (475+3+ii*5-jj*5 < 475+109) {
            ii++;
            percent_of_fire_V = (int)(((float)ii*5-(float)jj*5)/106.0f * 22);
        }
    } else {
        Sound(800);
        SDL_Delay(50);
    }
    Nosound();
}

void handle_fire_minus() {
    if (stove_open == 1) {
        Sound(900);
        setfillstyle(1,15);
        bar(475+109, 439+3-11, 475+112, 439+12-11);
        int slider_x = 475 + 3 + ii*5 - jj*5;
        if (slider_x > 475+3 && slider_x < 475+109) {
            bar(slider_x, 439+3-11, slider_x+3, 439+12-11);
        }
        if (475+3+ii*5-jj*5 > 475+3) {
            jj++;
            percent_of_fire_V = (int)(((float)ii*5-(float)jj*5)/106.0f * 22);
        }
        slider_x = 475 + 3 + ii*5 - jj*5;
        setfillstyle(1,15);
        bar(slider_x, 439+3-11, slider_x+3, 439+12-11);
    } else {
        Sound(800);
        SDL_Delay(50);
    }
    Nosound();
}

void handle_air_plus() {
    Sound(1000);
    draw_air_valve_open(338,81,0);
    valve_air_open = 1;
    int slider_x = 370+105+3+kk*5-ff*5;
    if (slider_x >= 370+105+3 && slider_x < 370+105+109) {
        setfillstyle(1,1);
        bar(slider_x, 190+185+3-12, slider_x+3, 190+185+12-12);
    }
    if (370+105+3+kk*5-ff*5 < 370+105+109) {
        kk++;
        percent_of_air_V = (int)(((float)kk*5-(float)ff*5)/106.0f * 22);
    }
    if (Pressure > 0) draw_air_valve_open(338,81,percent_of_air_V);
    if (percent_of_air_V == 0) draw_air_valve_close(338,81,0);
    Nosound();
}

void handle_air_minus() {
    Sound(900);
    setfillstyle(1,15);
    bar(370+105+109, 190+184+3-11, 370+105+112, 190+184+12-11);
    int slider_x = 370+105+3+kk*5-ff*5;
    if (slider_x > 370+105+3 && slider_x < 370+105+109) {
        bar(slider_x, 190+184+3-11, slider_x+3, 190+184+12-11);
    }
    if (370+105+3+kk*5-ff*5 > 370+105+3) {
        ff++;
        percent_of_air_V = (int)(((float)kk*5-(float)ff*5)/106.0f * 22);
    }
    slider_x = 370+105+3+kk*5-ff*5;
    setfillstyle(1,15);
    bar(slider_x, 190+184+3-11, slider_x+3, 190+184+12-11);
    if (percent_of_air_V == 0) {
        valve_air_open = 0;
        draw_air_valve_close(338,81,0);
    }
    if (Pressure >= 0) draw_air_valve_close(338,81,percent_of_air_V);
    Nosound();
}

void handle_valve_water_in_press() {
    setfillstyle(1,0); fillellipse(370+60+21,190+80,3,3);
    setfillstyle(1,15); fillellipse(370+81+21,190+80,3,3);
    valve_1_open = 1;
    draw_valve_open(110,175);
    // Descending frequency sweep matching original Project_Mouse.cpp:358-360
    Sound(1450);Sound(1400);Sound(1350);Sound(1300);
    Sound(1250);Sound(1200);Sound(1150);Sound(1100);
    Sound(1050);Sound(1000);Sound(950); Sound(900);
    // Fill inlet pipe indication window with water color (ellipses + bar between)
    setfillstyle(1,9);
    fillellipse(80,186,4,4); fillellipse(100,186,4,4);
    bar(80,183,100,189);
    if (Water_in_boiler <= 179) Water_in_boiler++;
    else Water_in_boiler = 180;
    water_level_up(110,175,Water_in_boiler);
    putout_level(110-12,195,Water_in_boiler);
}

void handle_valve_water_in_release() {
    Nosound();
    setfillstyle(1,15); fillellipse(370+60+21,190+80,3,3);
    setfillstyle(1,0); fillellipse(370+81+21,190+80,3,3);
    draw_valve_close(110,175);
    if (Water_in_boiler < 130) {
        // Clear inlet pipe indication window back to empty color
        setfillstyle(1,5);
        fillellipse(80,186,4,4); fillellipse(100,186,4,4);
        bar(80,183,100,189);
    }
}

void handle_valve_water_out_press() {
    setfillstyle(1,15); fillellipse(370+191+21,190+80,3,3);
    setfillstyle(1,0); fillellipse(370+191,190+80,3,3);
    draw_valve_open(110+185,175+77);
    // Ascending frequency sweep matching original Project_Mouse.cpp:414-415
    Sound(900); Sound(950); Sound(1000);
    Sound(1050); Sound(1100); Sound(1150);
    if (Water_in_boiler >= 48) {
        // Fill both outlet pipe indication windows with water color (ellipses + bar)
        setfillstyle(1,9);
        fillellipse(195,263,4,4); fillellipse(215,263,4,4);
        bar(195,260,215,266);
        fillellipse(260,263,3,3); fillellipse(280,263,3,3);
        bar(260,260,280,266);
        if (Water_in_boiler >= 1) Water_in_boiler--;
        else Water_in_boiler = 0;
        if (water_alarm == 1 && Water_in_boiler < 125) {
            draw_alarm_of_water(141,118,10);
            water_alarm = 0;
        }
        water_level_down(110,175,Water_in_boiler);
        putout_level(110-12,195,Water_in_boiler);
        if (Water_in_boiler < 50) {
            // Clear both outlet pipe indication windows back to empty color (ellipses + bar)
            setfillstyle(1,5);
            fillellipse(195,263,4,4); fillellipse(215,263,4,4);
            bar(195,260,215,266);
            fillellipse(260,263,3,3); fillellipse(280,263,3,3);
            bar(260,260,280,266);
        }
    }
}

void handle_valve_water_out_release() {
    Nosound();
    setfillstyle(1,15); fillellipse(370+191,190+80,3,3);
    setfillstyle(1,0); fillellipse(370+191+21,190+80,3,3);
    draw_valve_close(110+185,175+77);
    // Clear both outlet pipe indication windows back to empty color (ellipses + bar)
    setfillstyle(1,5);
    fillellipse(195,263,4,4); fillellipse(215,263,4,4);
    bar(195,260,215,266);
    fillellipse(260,263,3,3); fillellipse(280,263,3,3);
    bar(260,260,280,266);
    if (Water_in_boiler < 130) {
        // Clear inlet pipe indication window back to empty color
        setfillstyle(1,5);
        fillellipse(80,186,4,4); fillellipse(100,186,4,4);
        bar(80,183,100,189);
    }
}

void handle_stove_open_btn() {
    setfillstyle(1,15); fillellipse(370+81+21+70,190+125,3,3);
    setfillstyle(1,0); fillellipse(370+81+70,190+125,3,3);
    if (stove_open == 0) {
        stove_open = 1;
        draw_open_stove_button_pressed(60,360);
        draw_close_stove_button(210,360);
        draw_stove_open(95,320);
        settextstyle(0,0,0);
    } else {
        Sound(800);
        SDL_Delay(50);
        Nosound();
    }
}

void handle_lang_toggle() {
    // Flip language
    g_language = (g_language == LANG_CN) ? LANG_EN : LANG_CN;
    // Redraw entire UI in new language
    mian_interface_initialize();
    // Restore dynamic visual state that mian_interface_initialize draws as default
    if (valve_1_open == 1) draw_valve_open(110,175);
    if (stove_open == 1) {
        draw_open_stove_button_pressed(60,360);
        draw_close_stove_button(210,360);
        draw_stove_open(95,320);
    }
    // Water level and gauge displays are restored by the main loop's per-frame updates
    putout_level(110-12,195,Water_in_boiler);
    water_level_up(110,175,Water_in_boiler);
}

void handle_stove_close_btn() {
    if (stove_open == 1 && percent_of_air_V == 0 && percent_of_fire_V == 0) {
        stove_open = 0;
        draw_close_stove_button_pressed(210,360);
        draw_open_stove_button(60,360);
        draw_stove_close(95,320);
        setfillstyle(1,3);
        bar(85+3,460+3-12,85+112,460+12-12);
        ii = 1; jj = 1;
        settextstyle(0,0,0);
        setcolor(15);
        setfillstyle(1,0); fillellipse(370+81+21+70,190+125,3,3);
        setfillstyle(1,15); fillellipse(370+81+70,190+125,3,3);
    } else {
        Sound(800);
        SDL_Delay(50);
        Nosound();
    }
}