world_of_cow/ui.c

#include "ui.h"
#include "vec.h"
#include <GL/freeglut_std.h>
#include <GL/freeglut_ext.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <stdio.h>

void ui_button_draw(ui_button* b) {
    printf("drawing button %p\n", b);
    int wWidth = glutGet(GLUT_WINDOW_WIDTH);
    int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
    
    vec3 pos = vec3_add(b->position.absolute, vec3_new(b->position.relative.x * wWidth, b->position.relative.y * wHeight, 0.0));
    vec3 ext = b->size;
    glColor3f(1.0, 1.0, 1.0);
    glBegin(GL_QUADS);
        glVertexVec(pos);
        glVertex3f(pos.x + ext.x, pos.y, pos.z);
        glVertexVec(vec3_add(pos, ext));
        glVertex3f(pos.x, pos.y + ext.y, pos.z);
    glEnd();
    // Draw text if needed
    if(b->text != NULL) {
        glColor3f(0.0, 0.0, 0.0);
        // Get text size
        int textWidth = glutBitmapLength(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
        int textHeight = glutBitmapHeight(GLUT_BITMAP_TIMES_ROMAN_24);
        // set raster position - not gonna take into account multiple line text buttons
        vec3 rPos = vec3_add(pos, vec3_mult(ext, 0.5));
        rPos.x -= textWidth * 0.5;
        rPos.y -= textHeight * 0.25;
        glRasterPos3f(rPos.x, rPos.y, rPos.z);
        glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
    }
}

char ui_button_mouse_over(ui_button* b) {
    return 0;
}

void ui_slider_draw(ui_slider* s) {
    
}
char ui_slider_mouse_over(ui_slider* s) {
    return 0;
}