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button work with hover

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merge-requests/1/merge
Mathis RIBEMONT 4 years ago
parent 4dfbfb7bc4
commit 4352634712
3 changed files with 79 additions and 25 deletions
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40
Pontu/include/engine/Button.h
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@ -1,7 +1,7 @@
/**
* \file Button.h
* \brief Basic button
* \author Allan Point
* \author Allan Point, Mathis Ribémont
* \date 29/11/2021
*/
@ -11,6 +11,8 @@
#include <SDL2/SDL.h>
#include <stdbool.h>
struct P_buttonArg;
/**
* \struct P_Button
* \brief Represents a button
@ -18,13 +20,27 @@
typedef struct
{
SDL_Texture* texture; ///> background sprite or texture
SDL_Texture* hoverTexture; ///> texture to draw when the button is hovered
SDL_Rect rect; ///> defines coordinates and size for hitbox and display
void (*onClick)(void); ///> action done on click
void (*onClick)(struct P_buttonArg* arg); ///> action done on click
bool drawn; ///> is the button drawn
bool hover; ///> is the button hovered
} P_Button;
/**
* \struct P_Button
* \brief Structure of arguments to pass to onClick function
*/
typedef struct P_buttonArg
{
P_Button* buttonCaller; ///> button who call the one click
SDL_Texture* texture; ///> texture to putt on the button if we want to change his default texture;
} P_ButtonArg;
/**
* \brief Creates a brand new button with specs
* \param[in] texture background image for the button (NOT NULL)
* \param[in] texture texture for the button (NOT NULL)
* \param[in] hoverTexture texture for the button when it's hover (can be NULL)
* \param[in] coordx placement in width
* \param[in] coordy placement in height
* \param[in] sizex button's width
@ -33,15 +49,16 @@ typedef struct
* \pre At least text or texture must be defined, or an error will be printed in STDERR.
* \return a button created with the specs passed as params, or NULL if there was an error.
*/
P_Button createButton(SDL_Texture* texture, const int coordx, const int coordy, const int sizex, const int sizey, void (*onClick)(void));
P_Button createButton(SDL_Texture* texture, SDL_Texture* hoverTexture ,const int coordx, const int coordy, const int sizex, const int sizey, void (*onClick)(P_ButtonArg* arg));
/**
* \brief draw a button on a renderer
* \brief draw a button on a renderer with his texture according if it hover or not
* \param[in] renderer the renderer you want to draw the button on
* \param[in] button the button you want to draw
* \pre At least text or texture must be defined, or an error will be printed in STDERR.
* \return false if the texture is null
*/
void drawButtonOnRenderer(SDL_Renderer* renderer, const P_Button* button);
bool drawButtonOnRenderer(SDL_Renderer* renderer, P_Button* button);
/**
* \brief Test if a point is on a button
@ -50,7 +67,14 @@ void drawButtonOnRenderer(SDL_Renderer* renderer, const P_Button* button);
* \param[in] y y of the point
* \return SDL_TRUE if the point is on the button
*/
SDL_bool isHover(P_Button button, int x,int y);// dit si le bouton est survolé en donnant les coordonnées x,y
//void changeButtonTexture(P_Button* button, const SDL_Texture* texture);
bool isHover(P_Button* button, int x,int y);// dit si le bouton est survolé en donnant les coordonnées x,y
/**
* \brief Test if a point is on a button
* \param[in] button the button target
* \param[in] texture the texture you want to apply to the button
* \return false if the texture is NULL
*/
bool changeButtonTexture(P_Button* button, SDL_Texture* texture);
#endif

32
Pontu/src/engine/Button.c
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@ -1,34 +1,44 @@
#include "engine/Button.h"
#include <stdio.h>
#include <assert.h>
#include <stdbool.h>
P_Button createButton(SDL_Texture* texture, const int coordx,
const int coordy, const int sizex, const int sizey,
void (*onClick)(void))
P_Button createButton(SDL_Texture* texture, SDL_Texture* hoverTexture ,const int coordx, const int coordy, const int sizex, const int sizey, void (*onClick)(P_ButtonArg* arg))
{
// Declarations
P_Button b = { .rect = { .x = coordx, .y = coordy, .w = sizex, .h = sizey }, .onClick = onClick };
P_Button b = { .rect = { .x = coordx, .y = coordy, .w = sizex, .h = sizey }, .onClick = onClick, .drawn = false};
assert(texture != NULL && "ERROR: Button created without texture");
b.texture = texture;
b.hoverTexture = hoverTexture;
return b;
}
void drawButtonOnRenderer(SDL_Renderer* renderer,const P_Button* button)
bool drawButtonOnRenderer(SDL_Renderer* renderer, P_Button* button)
{
if(SDL_RenderCopy(renderer,button->texture,NULL,&(button->rect)))
if(SDL_RenderCopy(renderer,button->hover && button->hoverTexture != NULL ? button->hoverTexture : button->texture,NULL,&(button->rect)))
{
fprintf(stderr,"Error: %s\n",SDL_GetError());
exit(1);
fprintf(stderr,"Warning: %s\n",SDL_GetError());
return false;
}
button->drawn = true;
}
SDL_bool isHover(const P_Button button,const int x,const int y)
bool isHover(P_Button* button,const int x,const int y)
{
SDL_Point coord;
coord.x = x;
coord.y = y;
return SDL_PointInRect(&coord,&(button.rect));
button->hover = SDL_PointInRect(&coord,&(button->rect));
return button->hover && button->drawn;
}
bool changeButtonTexture(P_Button* button, SDL_Texture* texture)
{
if(texture == NULL){
fprintf(stderr,"Warning: button texture cannot change to NULL\n");
return false;
}
button->texture = texture;
}

32
Pontu/test/testBouton.c → Pontu/test/testButton.c
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@ -4,8 +4,9 @@
//gcc test.c -I ../include $(sdl2-config --cflags --libs)
void action(){
void action(P_ButtonArg* arg){
printf("Clické\n");
changeButtonTexture(arg->buttonCaller,arg->texture);
}
int main(int argc, char const *argv[]) {
@ -61,10 +62,26 @@ int main(int argc, char const *argv[]) {
SDL_Texture* buttonTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,SDL_TEXTUREACCESS_TARGET,20,20);
SDL_SetRenderTarget(renderer, buttonTexture);
SDL_SetRenderDrawColor(renderer, 255,255,255,255);
SDL_Rect buttonRect = {.x = 0,.y = 0,.w = 20,.h = 20};
SDL_Rect buttonRect = {.x = 0,.y = 0,.w = 50,.h = 70};
SDL_RenderFillRect(renderer, &buttonRect);
P_Button button = createButton(buttonTexture, 10, 10, 20, 20, &action);
SDL_Texture* blueTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,SDL_TEXTUREACCESS_TARGET,20,20);
SDL_SetRenderDrawColor(renderer, 0,0,255,255);
SDL_SetRenderTarget(renderer, blueTexture);
SDL_RenderFillRect(renderer, &buttonRect);
P_Button button = createButton(buttonTexture,blueTexture ,20, 20, 70, 50, &action);
P_ButtonArg arg;
arg.buttonCaller = &button;
SDL_Texture* violetTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,SDL_TEXTUREACCESS_TARGET,20,20);
SDL_SetRenderDrawColor(renderer, 150,75,200,255);
SDL_SetRenderTarget(renderer, violetTexture);
SDL_RenderFillRect(renderer, &buttonRect);
SDL_SetRenderTarget(renderer, NULL);
arg.texture = violetTexture;
button.hoverTexture = blueTexture;
while(!quit)
{
while(SDL_PollEvent(&event))
@ -75,9 +92,12 @@ int main(int argc, char const *argv[]) {
quit = SDL_TRUE;
break;
case SDL_MOUSEBUTTONUP:
if(isHover(button,event.button.x,event.button.y))
button.onClick();
if(isHover(&button,event.button.x,event.button.y))
button.onClick(&arg);
break;
case SDL_MOUSEMOTION:
//on vérifie à chaque tour ou est la souris, drawButtonOnRenderer choisit la bonne texture à afficher
isHover(&button,event.motion.x,event.motion.y);
break;
}
}
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