146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/* source/widgets/sgl_label.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_label.h"
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/**
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* @brief construct the label object
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* @param surf pointer to the surface
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* @param obj pointer to the label 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_label_construct_cb(sgl_surf_t *surf, sgl_obj_t *obj, sgl_event_t *evt)
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{
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sgl_label_t *label = sgl_container_of(obj, sgl_label_t, obj);
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sgl_pos_t align_pos;
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SGL_ASSERT(label->font != NULL);
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if (evt->type == SGL_EVENT_DESTROYED)
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{
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/* 释放动态文本缓冲 */
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if (label->text_buf != NULL)
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{
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sgl_free(label->text_buf);
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label->text_buf = NULL;
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}
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return;
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}
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if (evt->type == SGL_EVENT_DRAW_MAIN)
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{
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if (label->bg_flag)
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{
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sgl_draw_fill_rect(surf, &obj->area, &obj->coords, obj->radius, label->bg_color, label->alpha);
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}
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align_pos = sgl_get_text_pos(&obj->coords, label->font, label->text, 0, (sgl_align_type_t)label->align);
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#if (CONFIG_SGL_LABEL_ROTATION)
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if (label->rota == 0)
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{
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#endif
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sgl_draw_string(surf, &obj->area, align_pos.x + label->transform.offset.offset_x,
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align_pos.y + label->transform.offset.offset_y,
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label->text, label->color, label->alpha, label->font);
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#if (CONFIG_SGL_LABEL_ROTATION)
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}
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else
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{
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const int16_t width = obj->area.x2 - obj->area.x1 + 1;
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const int16_t height = obj->area.y2 - obj->area.y1 + 1;
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const uint32_t buf_size = width * height;
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sgl_color_t *temp_buf = sgl_malloc(buf_size * sizeof(sgl_color_t));
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if (temp_buf == NULL)
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{
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SGL_LOG_ERROR("sgl_label_construct_cb: malloc rotation temp buffer failed");
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return;
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}
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for (uint32_t i = 0; i < buf_size; i++)
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{
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temp_buf[i] = label->bg_color;
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}
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sgl_surf_t temp_surf = {
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.x1 = 0,
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.y1 = 0,
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.x2 = width - 1,
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.y2 = height - 1,
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.buffer = temp_buf,
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.w = width,
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.h = height,
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.dirty = NULL};
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sgl_draw_string(&temp_surf, &obj->area, align_pos.x, align_pos.y,
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label->text, label->color, label->alpha, label->font);
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sgl_draw_xform_surf(surf, &temp_surf, &obj->area, obj->coords.x1, obj->coords.y1, label->transform.rotation);
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sgl_free(temp_buf);
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}
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#endif
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}
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}
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/**
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* @brief create a label object
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* @param parent parent of the label
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* @return pointer to the label object
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*/
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sgl_obj_t *sgl_label_create(sgl_obj_t *parent)
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{
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sgl_label_t *label = sgl_malloc(sizeof(sgl_label_t));
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if (label == NULL)
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{
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SGL_LOG_ERROR("sgl_label_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(label, 0, sizeof(sgl_label_t));
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sgl_obj_t *obj = &label->obj;
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sgl_obj_init(&label->obj, parent);
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obj->construct_fn = sgl_label_construct_cb;
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label->alpha = SGL_ALPHA_MAX;
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label->bg_flag = 0;
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label->text_buf = NULL;
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label->color = SGL_THEME_TEXT_COLOR;
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label->text = "";
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label->transform.rotation = 0;
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label->rota = 0;
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label->font = sgl_get_system_font();
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return obj;
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}
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