95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/* source/widgets/sgl_circle.c
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*
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* MIT License
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*
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* Copyright(c) 2023-present All contributors of SGL
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* Document reference link: https://sgl-docs.readthedocs.io
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <sgl_core.h>
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#include <sgl_draw.h>
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#include <sgl_math.h>
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#include <sgl_log.h>
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#include <sgl_mm.h>
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#include <sgl_theme.h>
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#include <sgl_cfgfix.h>
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#include <string.h>
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#include "sgl_circle.h"
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/**
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* @brief construct function of the circle object
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* @param surf pointer to the surface
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* @param obj pointer to the object
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* @param evt pointer to the event
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* @return none
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*/
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static void sgl_circle_construct_cb(sgl_surf_t *surf, sgl_obj_t* obj, sgl_event_t *evt)
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{
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sgl_circle_t *circle = sgl_container_of(obj, sgl_circle_t, obj);
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if(evt->type == SGL_EVENT_DRAW_MAIN) {
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circle->desc.cx = (circle->obj.coords.x1 + circle->obj.coords.x2) / 2;
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circle->desc.cy = (circle->obj.coords.y1 + circle->obj.coords.y2) / 2;
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sgl_draw_circle(surf, &obj->area, &circle->desc);
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}
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else if(evt->type == SGL_EVENT_DRAW_INIT) {
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if(circle->desc.radius == -1) {
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circle->desc.radius = (circle->obj.coords.y2 - circle->obj.coords.y1) / 2;
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}
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}
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}
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/**
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* @brief create a circle object
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* @param parent parent of the object
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* @return pointer to the object
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*/
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sgl_obj_t* sgl_circle_create(sgl_obj_t* parent)
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{
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sgl_circle_t *circle = sgl_malloc(sizeof(sgl_circle_t));
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if(circle == NULL) {
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SGL_LOG_ERROR("sgl_circle_create: malloc failed");
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return NULL;
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}
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/* set object all member to zero */
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memset(circle, 0, sizeof(sgl_circle_t));
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sgl_obj_t *obj = &circle->obj;
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sgl_obj_init(&circle->obj, parent);
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obj->construct_fn = sgl_circle_construct_cb;
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sgl_obj_set_border_width(obj, SGL_THEME_BORDER_WIDTH);
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obj->needinit = 1;
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circle->desc.alpha = SGL_ALPHA_MAX;
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circle->desc.color = SGL_THEME_COLOR;
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circle->desc.pixmap = NULL;
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circle->desc.border = SGL_THEME_BORDER_WIDTH;
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circle->desc.border_color = SGL_THEME_BORDER_COLOR;
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circle->desc.cx = -1;
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circle->desc.cy = -1;
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circle->desc.radius = -1;
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return obj;
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}
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