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115 lines
3.8 KiB
115 lines
3.8 KiB
#include <stdbool.h>
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#include "clickable.h"
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bool Clickable_CheckBounds(Clickable *c, int x, int y) {
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if(c->dimensions.x < x
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&&c->dimensions.x+c->dimensions.w > x
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&&c->dimensions.y < y
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&&c->dimensions.y+c->dimensions.h > y
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) {
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return true;
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}
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else {
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return false;
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}
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}
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Clickable *heldClickable;
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//Calls the clickables clickFunc iff the mouse is inside the clickable.
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//Returns true if it is clicked regardless of whether the clickFunc is NULL or not, and false otherwise.
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bool Clicky_ClickClickable(void *c_, int x, int y) {
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//printf("CALL: Clicky_ClickClickable\n Params: %p, %d, %d\n", c_, x, y);
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Clickable *c = c_;
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if(Clickable_CheckBounds(c, x, y)) {
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heldClickable = c;
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if(c->clickFunc != NULL) { //Not necessarily true.
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c->clickFunc((void*)c, x, y);
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}
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return true; //It doesn't matter if the clickable does anything, if it is clicked it reports it.
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}
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return false;
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}
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//Calls the clickables releaseFunc iff the mouse is inside the clickable.
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void Clicky_ReleaseClickable(void *c_, int x, int y) {
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Clickable *c = c_;
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if(Clickable_CheckBounds(c, x, y)) {
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heldClickable = c;
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if(c->releaseFunc != NULL) { //Not necessarily true.
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c->releaseFunc((void*)c, x, y);
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}
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}
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}
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//Calls the releasefunc of the held clickable, if it isn't NULL.
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void Clicky_ReleaseHeldClickable(int x, int y) {
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//printf("Releasing held clickable.\n");
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//printf(" heldClickable: %p\n", heldClickable);
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//printf(" heldClickable->x: %d\n", heldClickable->dimensions.x);
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//printf(" heldClickable->releaseFunc: %p\n", heldClickable->releaseFunc);
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if(heldClickable == NULL) {
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return; //Nothing to do.
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}
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//Only call the function if it exists.
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if(heldClickable->releaseFunc != NULL) {
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heldClickable->releaseFunc(heldClickable, x, y);
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}
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//Always clear this.
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heldClickable = NULL;
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}
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Dragable *currentDragged = NULL; //This gets dragged on.
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SDL_Rect dragOffset; //When a dragable gets dragged, this is the local offset into the container to move.
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void Clicky_DragUpdate(int x, int y) {
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if(currentDragged == NULL) {
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return; //Nothing to do here.
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}
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Dragable *d = currentDragged;
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d->coordinatesToDrag->x = x-dragOffset.x;
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d->coordinatesToDrag->y = y-dragOffset.y;
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//Check boundaries.
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if(d->boundaries != NULL) {
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//Left boundary.
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if(d->coordinatesToDrag->x < d->boundaries->x) {
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d->coordinatesToDrag->x = d->boundaries->x;
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}
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//Upper boundary.
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if(d->coordinatesToDrag->y < d->boundaries->y) {
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d->coordinatesToDrag->y = d->boundaries->y;
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}
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//Right boundary.
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if(d->coordinatesToDrag->x > d->boundaries->x + d->boundaries->w - d->coordinatesToDrag->w) {
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d->coordinatesToDrag->x = d->boundaries->x + d->boundaries->w - d->coordinatesToDrag->w;
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}
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//Lower boundary.
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if(d->coordinatesToDrag->y > d->boundaries->y + d->boundaries->h - d->coordinatesToDrag->h) {
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d->coordinatesToDrag->y = d->boundaries->y + d->boundaries->h - d->coordinatesToDrag->h;
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}
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//printf("New coords: %d, %d, %d, %d\n", d->coordinatesToDrag->x, d->coordinatesToDrag->y, d->coordinatesToDrag->x+d->coordinatesToDrag->w, d->coordinatesToDrag->y+d->coordinatesToDrag->h);
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}
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}
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//Sets the global variables for the dragging mechanism. They are used in the function Dragable_DragUpdate.
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void Dragable_ClickFunc(void *dragable, int x, int y) {
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//printf("Dragable clicked.\n");
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currentDragged = dragable;
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dragOffset.x = x - currentDragged->coordinatesToDrag->x;
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dragOffset.y = y - currentDragged->coordinatesToDrag->y;
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}
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//This function clears the global variables so nothing will be dragged.
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//The args are ignored.
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void Dragable_ReleaseFunc(void *dragable, int x, int y) {
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//printf("Dragable released.\n");
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currentDragged = NULL;
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dragOffset.x = 0;
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dragOffset.y = 0;
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}
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