RustyStriker/world_of_cow
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sliders can now draw and slide using mousewheel

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Rusty Striker 2023-07-05 12:24:14 +03:00
parent 5ceed7fd56
commit a3f4639a90
Signed by: RustyStriker
GPG key ID: 87E4D691632DFF15
3 changed files with 110 additions and 12 deletions
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52
mmn_17.c
View file

@ -14,8 +14,17 @@ ui_button buttons[] = {
/* text */ "Test :)"
}
};
ui_slider sliders[] = {
{
/* pos */ { { 0.5, 0.7, 0.0 }, {-50.0, -5.0, 0.0 } },
/* size */ { 100.0, 10.0, 10.0 },
0.1
}
};
void display(void) {
printf("Drawing!\n");
// Clear screen
glClearColor(0.0, 0.0, 0.0, 1.0); // Dark theme :)
glClear(GL_COLOR_BUFFER_BIT);
@ -23,6 +32,10 @@ void display(void) {
for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
ui_button_draw(b);
}
for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
ui_slider_draw(s);
}
int err = glGetError();
if(err != 0) {
printf("opengl error %d: %s\n", err, gluErrorString(err));
@ -32,7 +45,42 @@ void display(void) {
}
void mouseEvent(int button, int state, int x, int y) {
if(state == 1) {
for(ui_button* b = buttons; b < buttons + sizeof buttons / sizeof(ui_button); b += 1) {
if(ui_button_mouse_over(b, x, y) && b->onClick != NULL) {
b->onClick();
return;
}
}
}
for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
if(ui_slider_mouse_over(s, x, y)) {
ui_slider_onclick(s, x, y, button, state);
}
}
}
void mouseWheelEvent(int wheel, int dir, int x, int y) {
printf("wheel event\n");
for(ui_slider* s = sliders; s < sliders + sizeof sliders / sizeof(ui_slider); s += 1) {
if(ui_slider_mouse_over(s, x, y)) {
s->value += dir * 0.05;
if(s->value < 0.0) s->value = 0.0;
if(s->value > 1.0) s->value = 1.0;
printf("Updated %p value to %f\n", s, s->value);
}
}
glutPostRedisplay();
}
void keyboardEvent(unsigned char c, int x, int y) {
if(c == '\e') {
glutLeaveMainLoop();
exit(0);
}
if(c == 'a') {
glutPostRedisplay();
}
}
int main(int argc, char** argv) {
@ -45,6 +93,8 @@ int main(int argc, char** argv) {
glutCreateWindow("World of Cow");
glutDisplayFunc(display);
glutMouseFunc(mouseEvent);
glutKeyboardFunc(keyboardEvent);
glutMouseWheelFunc(mouseWheelEvent);
/* set projection and camera */
glMatrixMode(GL_PROJECTION);

63
ui.c
View file

@ -6,23 +6,32 @@
#include <GL/gl.h>
#include <stdio.h>
#define BACK_COLOR 0.3, 0.35, 0.35
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);
glColor3f(BACK_COLOR);
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();
glColor3f(0.7, 0.7, 0.8);
glLineWidth(2.0);
glBegin(GL_LINE_LOOP);
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);
glColor3f(1.0, 1.0, 1.0);
// Get text size
int textWidth = glutBitmapLength(GLUT_BITMAP_TIMES_ROMAN_24, (unsigned char*)b->text);
int textHeight = glutBitmapHeight(GLUT_BITMAP_TIMES_ROMAN_24);
@ -35,13 +44,51 @@ void ui_button_draw(ui_button* b) {
}
}
char ui_button_mouse_over(ui_button* b) {
return 0;
char ui_button_mouse_over(ui_button* b, int mouseX, int mouseY) {
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;
vec3 m = vec3_sub(vec3_new(mouseX, wHeight - mouseY, 0.0), pos);
return m.x > 0.0 && m.x < ext.x && m.y > 0.0 && m.y < ext.y;
}
void ui_slider_draw(ui_slider* s) {
int wWidth = glutGet(GLUT_WINDOW_WIDTH);
int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
vec3 pos = vec3_add(s->position.absolute, vec3_new(s->position.relative.x * wWidth, s->position.relative.y * wHeight, 0.0));
vec3 ext = s->size;
vec3 slider = vec3_add(pos, vec3_new(ext.x * s->value, ext.y * 0.5, 0.0));
glBegin(GL_QUADS);
// draw background line
glColor3f(BACK_COLOR);
glVertexVec(pos);
glVertex3f(pos.x + ext.x, pos.y, pos.z);
glVertex3f(pos.x + ext.x, pos.y + ext.y, pos.z);
glVertex3f(pos.x, pos.y + ext.y, pos.z);
// Draw slider button thing
glColor3f(1.0, 1.0, 1.0);
glVertex3f(slider.x - ext.z, slider.y - ext.y, 0.0);
glVertex3f(slider.x + ext.z, slider.y - ext.y, 0.0);
glVertex3f(slider.x + ext.z, slider.y + ext.y, 0.0);
glVertex3f(slider.x - ext.z, slider.y + ext.y, 0.0);
glEnd();
}
char ui_slider_mouse_over(ui_slider* s, int mouseX, int mouseY) {
int wWidth = glutGet(GLUT_WINDOW_WIDTH);
int wHeight = glutGet(GLUT_WINDOW_HEIGHT);
vec3 pos = vec3_add(s->position.absolute, vec3_new(s->position.relative.x * wWidth, s->position.relative.y * wHeight, 0.0));
vec3 ext = s->size;
vec3 m = vec3_sub(vec3_new(mouseX, wHeight - mouseY, 0.0), pos);
return m.x > 0.0 && m.x < ext.x && m.y > 0.0 && m.y < ext.y;
}
void ui_slider_onclick(ui_slider* s, int mouseX, int mouseY, int button, int state) {
}
char ui_slider_mouse_over(ui_slider* s) {
return 0;
}

7
ui.h
View file

@ -11,7 +11,7 @@ typedef struct _ui_button {
ui_pos position;
/* x,y - width,height, z - unused */
vec3 size; // size in pixels - if screen is too small i am not sure if it is a smart idea to make everything smaller
void (*onClick); // instead of passing stuff in, im just gonna put every state variable in global scope to ensure everything lives...
void (*onClick)(); // instead of passing stuff in, im just gonna put every state variable in global scope to ensure everything lives...
char* text;
} ui_button;
@ -23,9 +23,10 @@ typedef struct _ui_slider {
} ui_slider;
void ui_button_draw(ui_button* b);
char ui_button_mouse_over(ui_button* b);
char ui_button_mouse_over(ui_button* b, int mouseX, int mouseY);
void ui_slider_draw(ui_slider* s);
char ui_slider_mouse_over(ui_slider* s);
char ui_slider_mouse_over(ui_slider* s, int mouseX, int mouseY);
void ui_slider_onclick(ui_slider* s, int mouseX, int mouseY, int button, int state);
#endif