label.c

/**
 * This is the `label` example. It displays a label with an icon inside a frame.
 * The icon is merely a region inside the GUI tileset.
 */
#include "KW_gui.h"
#include "KW_frame.h"
#include "KW_label.h"
#include "KW_renderdriver_sdl2.h"

int main(int argc, char ** argv) {
  /* We are going to use the SDL2 Render Driver.
   * Initialize SDL, creating a SDL window and renderer */
  SDL_Init(SDL_INIT_EVERYTHING);
  SDL_Renderer * renderer;
  SDL_Window * window;
  SDL_CreateWindowAndRenderer(320, 240, 0, &window, &renderer);
  SDL_SetRenderDrawColor(renderer, 100, 100, 100, 1); /* pretty background */

  /* Now we are going to use the SDL2 Render Driver. Users can implement their own
   * render driver, as long as it complies to the KW_RenderDriver structure */
  KW_RenderDriver * driver = KW_CreateSDL2RenderDriver(renderer, window);

  /* Loads the "tileset.png" file as a surface */
  KW_Surface * set = KW_LoadSurface(driver, "tileset.png");

  /* At this point we can create the GUI. You can have multiple GUI instances
   * in the same window (or even different windows, its up to the Render Driver) */
  KW_GUI * gui = KW_Init(driver, set);

  /* Loads a font and sets it. KiWi does not manage foreign memory (it does not own
   * your pointers), so you must keep them to release later. */
  KW_Font * font = KW_LoadFont(driver, "Fontin-Regular.ttf", 12);
  KW_SetFont(gui, font);

  /* Define a geometry and create a frame */
  KW_Rect geometry = { .x = 0,.y = 0,.w = 320, .h = 240 };
  KW_Widget * frame = KW_CreateFrame(gui, NULL, &geometry);

  /* Now create a label that has the frame as the parent, reutilizing
   * the same geometry. Children widgets offset they x and y coordinates by their parent. */
  KW_Widget * label = KW_CreateLabel(gui, frame, "Label with an icon :)", &geometry);

  /* Sets the rect in the tileset to extract the icon from, and sets it in the label */
  KW_Rect iconrect = { .x = 0, .y = 48, .w = 24, .h = 24 };
  KW_SetLabelIcon(label, &iconrect);

  /* Just call KW_Paint(gui) in your game loop. */
  while (!SDL_QuitRequested()) {
    SDL_RenderClear(renderer);
    KW_ProcessEvents(gui);
    KW_Paint(gui);
    SDL_Delay(1);
    SDL_RenderPresent(renderer);
  }

  /* All widgets are free'd after a KW_Quit */
  KW_Quit(gui);

  /* Releases things */
  KW_ReleaseSurface(driver, set);
  KW_ReleaseFont(driver, font);
  KW_ReleaseRenderDriver(driver);
  SDL_Quit();

  return 0;
}