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#include "ui.h"
#include "game.h"
#include "settings.h"

void resizeInteractionChat(InteractionChat* chat, const Settings* settings)
{
  float renderWidth = GetRenderWidth();
  float renderHeight = GetRenderHeight();
  float height = settings->interactionChatHeight;
  
  chat->rect = (Rectangle){
    0.0,
    renderHeight - height,
    renderWidth,
    height
  };
}

void initInteractionChat(InteractionChat* chat, const Settings* settings)
{
  memset(&chat->text, 0, INTERACTION_CHAT_MAX * sizeof(char));
  chat->visible = false;
  chat->entityId = ENTITY_NONE;

  resizeInteractionChat(chat, settings);
}

void showInteractionChat(InteractionChat* chat)
{
  chat->visible = true;
}

void hideInteractionChat(InteractionChat* chat)
{
  chat->visible = false;
}

void setInteractionChat(InteractionChat* chat, const char* text)
{
  strncpy(chat->text, text, INTERACTION_CHAT_MAX * sizeof(char) - 1);
}

void writeToInteractionChat(InteractionChat* chat, const char* text)
{
  strncat(chat->text, text, INTERACTION_CHAT_MAX * sizeof(char) - 1);
}

void clearInteractionChat(InteractionChat* chat)
{
  memset(&chat->text, 0, INTERACTION_CHAT_MAX * sizeof(char));
}

void updateInteractionChat(InteractionChat* chat, Game* game)
{
  if (IsWindowResized())
  {
    resizeInteractionChat(chat, &game->settings);
  }
    
  if (!chat->visible)
  {
    return;
  }

  Color background = DARKGRAY;
  background.a = game->settings.interactionAlpha;
  DrawRectangleRec(chat->rect, background);

  float lineThickness = game->settings.interactionOutlineSize;
  float border = lineThickness + 1.0;
  int fontSize = game->settings.interactionFontSize;
  
  DrawRectangleLinesEx(chat->rect, lineThickness, BLACK);

  if (chat->entityId != ENTITY_NONE)
  {
    DrawText(TextFormat("%s says:", getEntityName(chat->entityId)),
             chat->rect.x + border,
             chat->rect.y + border,
             fontSize,
             WHITE);
  }

  DrawText(chat->text,
           chat->rect.x + border,
           chat->rect.y + (border * 2.0) + fontSize,
           fontSize,
           GREEN);

  DrawText("Hit enter to continue...",
           chat->rect.x + border,
           chat->rect.y + chat->rect.height - fontSize - border,
           fontSize,
           WHITE);
}

void resizeInteractionMenu(InteractionMenu* menu, const Settings* settings)
{
  menu->rect.width = settings->interactionMenuWidth;
  menu->rect.height = (INTERACTION_MENU_MAX + 4) * settings->interactionFontSize;
  menu->rect.x = 0.0;
  menu->rect.y = GetRenderHeight() - settings->interactionChatHeight -
    menu->rect.height - settings->interactionOutlineSize;
}

void initInteractionMenu(InteractionMenu* menu, const Settings* settings)
{
  resetInteractionMenu(menu);
  resizeInteractionMenu(menu, settings);
  menu->visible = false;
  menu->entityId = ENTITY_NONE;
}

void setInteractionMenu(InteractionMenu* menu,
                        const InteractionItems items,
                        int itemCount)
{
  // Check for out of bounds.
  if (itemCount > INTERACTION_MENU_MAX)
  {
    TraceLog(LOG_ERROR, "itemCount > INTERACTION_MENU_MAX");
    return;
  }

  menu->itemCount = itemCount;
  
  for (int index = 0; index < itemCount; ++index)
  {
    strncpy(menu->items[index], items[index],
            INTERACTION_LABEL_MAX * sizeof(char) - 1);
  }
}

void resetInteractionMenu(InteractionMenu* menu)
{
  for (int index = 0; index < INTERACTION_MENU_MAX; ++index)
  {
    memset(menu->items[index], 0, INTERACTION_LABEL_MAX * sizeof(char));
  }

  menu->itemCount = 0;
}

void showInteractionMenu(InteractionMenu* menu)
{
  menu->visible = true;
}

void hideInteractionMenu(InteractionMenu* menu)
{
  menu->visible = false;
}

void updateInteractionMenu(InteractionMenu* menu, Game* game)
{
  if (IsWindowResized())
  {
    resizeInteractionMenu(menu, &game->settings);
  }

  if (!menu->visible)
  {
    return;
  }

  // Draw background.
  Color background = DARKGRAY;
  background.a = game->settings.interactionAlpha;
  DrawRectangleRec(menu->rect, background);

  float lineThickness = game->settings.interactionOutlineSize;
  float border = lineThickness + 1.0;
  int fontSize = game->settings.interactionFontSize;

  DrawRectangleLinesEx(menu->rect, lineThickness, BLACK);

  Vector2 position = (Vector2){menu->rect.x + border,
                               menu->rect.y + border};

  // Draw top information.
  DrawText("Press a number key to select", position.x, position.y, fontSize,
           WHITE);

  position.y += fontSize + fontSize;
  

  // Draw items.
  for (int index = 0; index < menu->itemCount; ++index)
  {
    DrawText(TextFormat("%d: ", index + 1), position.x, position.y, fontSize,
             WHITE);
    DrawText(TextFormat("    %s", menu->items[index]), position.x, position.y,
             fontSize, GREEN);
    position.y += fontSize;
  }
}