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lame_ui.c
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/*
* Created on: 02-Apr-2020
*/
/**
* @file lame_ui.c
* @author Avra Mitra
* @brief Source FIle of LameUI GUI library. Must include lame_ui.h. No other file is mandatory.
* @version 2.0
* @date 2023-10-26
*
* @copyright Copyright (c) 2020-2023
*
*/
#include "lame_ui.h"
/*-------------------------------------
* Global variables
*-------------------------------------
*/
static uint8_t g_lui_needs_render = 0;
static _lui_mem_block_t g_lui_mem_block;
static _lui_main_t* g_lui_main;
/*-------------------------------------
* End
*-------------------------------------
*/
/*-------------------------------------------------------------------------------
* Main functions
*-------------------------------------------------------------------------------
*/
int8_t lui_init(uint8_t mem_block[], uint32_t size)
{
_lui_mem_init(mem_block, size);
g_lui_main = (_lui_main_t* )_lui_mem_alloc(sizeof(_lui_main_t));
if (g_lui_main == NULL)
return -1;
// g_lui_main->scenes = {NULL};
g_lui_main->default_font = &LUI_DEFAULT_FONT;
g_lui_main->disp_drv = NULL;
g_lui_main->touch_input_dev = NULL;
g_lui_main->last_touch_data.x = -1;
g_lui_main->last_touch_data.y = -1;
g_lui_main->last_touch_data.is_pressed = 0;
g_lui_main->input_event_clicked = 0;
g_lui_main->input_state_pressed = 0;
g_lui_main->total_scenes = 0;
g_lui_main->active_scene = NULL;
g_lui_main->active_obj = NULL;
g_lui_main->total_created_objects = 0;
return 0;
}
int8_t lui_set_default_font(const lui_font_t* font)
{
if (font == NULL)
return -1;
g_lui_main->default_font = font;
return 0;
}
void lui_update()
{
if ( g_lui_main->active_scene == NULL)
return;
// if no display driver is registered, return
if (_lui_disp_drv_check() == 0)
return;
lui_obj_t* obj_caused_cb = NULL;
// Reading input
obj_caused_cb = _lui_process_input_of_act_scene();
if (g_lui_needs_render)
{
_lui_object_render_parent_with_children( g_lui_main->active_scene);
}
//All rendering done, now we'll handle the callback
// if the object that caused callback is not NULL and if the object has a callback func,
if (obj_caused_cb != NULL && obj_caused_cb->obj_event_cb != NULL)
{
// Call the user-supplied callback
obj_caused_cb->obj_event_cb(obj_caused_cb);
//event callback handled, so reset it
obj_caused_cb->event = LUI_EVENT_NONE;
}
}
/*-------------------------------------------------------------------------------
* END
*-------------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------------
* LUI_LABEL related functions
*-------------------------------------------------------------------------------
*/
void lui_label_draw(lui_obj_t* obj)
{
if (_lui_verify_obj(obj, LUI_OBJ_LABEL) < 0)
return;
if (!(obj->visible))
return;
lui_label_t* lbl = (lui_label_t* )(obj->obj_main_data);
// if no display driver is registered, return
if (_lui_disp_drv_check() == 0)
return;
lui_area_t lbl_area = {
.x = obj->x,
.y = obj->y,
.w = obj->common_style.width,
.h = obj->common_style.height
};
uint16_t bg_color = obj->common_style.bg_color;
const lui_bitmap_t* parent_bmp = NULL;
lui_bitmap_mono_pal_t* mono_palette = NULL;
lui_area_t bmp_crop;
if (obj->parent && lbl->style.is_transparent_bg)
{
bg_color = obj->parent->common_style.bg_color;
/* NOTE: panel and scene both have same first items in the struct. So even if
* the parent is scene, we can use lui_panel_t for casting.
*/
lui_panel_t* panel = (lui_panel_t* )(obj->parent->obj_main_data);
if (panel->bg_image)
{
parent_bmp = panel->bg_image;
mono_palette = &panel->img_pal;
bmp_crop.x = obj->x - obj->parent->x;
bmp_crop.y = obj->y - obj->parent->y;
bmp_crop.w = lbl_area.w;
bmp_crop.h = lbl_area.h;
// if (panel->image_crop)
// {
// bmp_crop.x += panel->image_crop->x;
// bmp_crop.y += panel->image_crop->y;
// }
}
}
lui_gfx_draw_string_advanced(
lbl->text,
&lbl_area,
lbl->style.text_color,
bg_color,
parent_bmp,
mono_palette,
&bmp_crop,
1,
lbl->font);
// Draw the label border if needed
if (obj->common_style.border_width)
{
lui_gfx_draw_rect(
obj->x, obj->y, obj->common_style.width,
obj->common_style.height, obj->common_style.border_width,
obj->common_style.border_color);
}
}
lui_obj_t* lui_label_create(void)
{
// if total created objects become more than max allowed objects, don't create the object
if ( g_lui_main->total_created_objects + 1 > LUI_MAX_OBJECTS)
return NULL;
g_lui_main->total_created_objects++;
lui_label_t* initial_label = (lui_label_t* )_lui_mem_alloc(sizeof(*initial_label));
if (initial_label == NULL)
return NULL;
initial_label->text = "";
initial_label->font = g_lui_main->default_font;
initial_label->style.text_color = LUI_STYLE_LABEL_TEXT_COLOR;
initial_label->style.is_transparent_bg = 1;
lui_obj_t* obj = _lui_object_create();
if (obj == NULL)
return NULL;
// objeect type
obj->obj_type = LUI_OBJ_LABEL;
// object common style
obj->common_style.bg_color = LUI_STYLE_LABEL_BG_COLOR;
obj->common_style.border_color = LUI_STYLE_LABEL_BORDER_COLOR;
obj->common_style.border_width = LUI_STYLE_LABEL_BORDER_THICKNESS;
obj->common_style.width = LUI_STYLE_LABEL_WIDTH;
obj->common_style.height = LUI_STYLE_LABEL_HEIGHT;
obj->obj_main_data = (void* )initial_label;
return obj;
}
lui_obj_t* lui_label_create_and_add(lui_obj_t* obj_parent)
{
_LUI_CREATE_AND_ADD(label, obj_parent)
}
void lui_label_set_font(lui_obj_t* obj, const lui_font_t* font)
{
if (_lui_verify_obj(obj, LUI_OBJ_LABEL) < 0)
return;
if (font == NULL)
return;
lui_label_t* lbl = (lui_label_t* )(obj->obj_main_data);
lbl->font = font;
_lui_object_set_need_refresh(obj->parent);
}
void lui_label_set_text(lui_obj_t* obj, const char* text)
{
if (_lui_verify_obj(obj, LUI_OBJ_LABEL) < 0)
return;
lui_label_t* lbl = (lui_label_t* )(obj->obj_main_data);
lbl->text = (char*)text;
_lui_object_set_need_refresh(obj);
}
void lui_label_set_text_color(lui_obj_t* obj, uint16_t text_color)
{
if (_lui_verify_obj(obj, LUI_OBJ_LABEL) < 0)
return;
lui_label_t* lbl = (lui_label_t* )(obj->obj_main_data);
if (lbl->style.text_color == text_color)
return;
lbl->style.text_color = text_color;
_lui_object_set_need_refresh(obj);
}
void lui_label_set_bg_transparent(lui_obj_t* obj, uint8_t is_transparent)
{
if (_lui_verify_obj(obj, LUI_OBJ_LABEL) < 0)
return;
lui_label_t* lbl = (lui_label_t* )(obj->obj_main_data);
if (lbl->style.is_transparent_bg == is_transparent)
return;
lbl->style.is_transparent_bg = is_transparent ? 1 : 0;
_lui_object_set_need_refresh(obj);
}
/*-------------------------------------------------------------------------------
* END
*-------------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------------
* LUI_LINE_CHART related functions
*-------------------------------------------------------------------------------
*/
#if defined(LUI_USE_LINECHART)
/*
* Draw a line chart
*/
void lui_linechart_draw(lui_obj_t* obj)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
if (!(obj->visible))
return;
// if no display driver is registered, return
if (_lui_disp_drv_check() == 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
uint16_t temp_x = obj->x;
uint16_t temp_y = obj->y;
uint16_t width = obj->common_style.width;
uint16_t height = obj->common_style.height;
uint16_t line_color = chart->style.line_color;
uint16_t data_points = chart->data.points;
double mapped_data[g_lui_main->disp_drv->display_hor_res * 2];
double x_data_min_new = obj->x;
double x_data_max_new = obj->x + width - 1;
//[0][0] element of 2D array is x_min
// address of [0][0] = base address
double x_data_min_old = *(chart->data.source);
//[n][0] element of 2D array is x_max
//address of [n][0] = base address + (n*2) - 2
double x_data_max_old = *(chart->data.source + (data_points*2) - 2);
double y_data_min_new = obj->y + height - 1;
double y_data_max_new = obj->y;
double y_data_min_old;
double y_data_max_old;
// If data auto-scale is enabled, find out the Y max and min value
if (chart->data.auto_scale == 1)
{
// Initially, Max and Min both are set to the first Y value of the source array
double y_max = *(chart->data.source + 1);
double y_min = y_max;
// Now compare max and min with y values from source array to find the maximum and minimum
for (uint16_t i = 1; i < data_points; i++)
{
double y_val = *(chart->data.source + (i*2) + 1);
if (y_max < y_val)
y_max = y_val;
if (y_min > y_val)
y_min = y_val;
}
if (y_max == y_min)
{
y_max = _LUI_MAX(y_max, y_max + 1); // preventing overflow
}
y_data_min_old = y_min;
y_data_max_old = y_max;
}
// If not enabled, use user-supplied max and min value
else
{
y_data_min_old = chart->data.y_min_value;
y_data_max_old = chart->data.y_max_value;
}
// Draw the chart background
lui_gfx_draw_rect_fill(temp_x, temp_y, width, height, obj->common_style.bg_color);
// Draw the scale numbers
// Draw the chart grid if needed
if (chart->style.grid_visible)
{
uint16_t hor_grid_spacing = height / (chart->grid.hor_count + 1);
uint16_t vert_grid_spacing = width / (chart->grid.vert_count + 1);
// Draw the vertical grids from left to right
for (int i = 1; i <= chart->grid.vert_count; i++)
{
uint16_t temp_x_new = temp_x + (i * vert_grid_spacing);
lui_gfx_draw_line(temp_x_new, temp_y, temp_x_new, temp_y + height - 1, 1, chart->style.grid_color);
}
// Draw the horizontal grids from bottom to top
uint16_t y_bottom = temp_y + height;
for (int i = 1; i <= chart->grid.hor_count; i++)
{
uint16_t temp_y_new = y_bottom - (i * hor_grid_spacing);
lui_gfx_draw_line(temp_x, temp_y_new, temp_x + width - 1, temp_y_new, 1, chart->style.grid_color);
}
}
// Map all the point values to pixel co-ordinate values
for (uint16_t i = 0; i < data_points; i++)
{
double x_data_old = *(chart->data.source + (i*2));
double y_data_old = *(chart->data.source + (i*2) + 1);
// Mapping range of x values
mapped_data[i*2] = _lui_map_range(x_data_old, x_data_max_old, x_data_min_old, x_data_max_new, x_data_min_new);
// Mapping range of y values
mapped_data[i*2 + 1] = _lui_map_range(y_data_old, y_data_max_old, y_data_min_old, y_data_max_new, y_data_min_new);
}
lui_area_t clip_win = {temp_x, temp_y, width, height};
// Now draw the lines using the mapped points to make the graph
for (uint16_t i = 0; i < data_points - 1; i++)
{
uint32_t i_cur_x = (i * 2), i_cur_y = (i * 2 + 1);
uint32_t i_nxt_x = (i * 2 + 2), i_nxt_y = (i * 2 + 3);
if (chart->style.draw_mode & LUI_LINECHART_DRAW_MODE_LINE)
{
if (chart->data.auto_scale)
{
lui_gfx_draw_line_clipped(
mapped_data[i_cur_x], mapped_data[i_cur_y],
mapped_data [i_nxt_x], mapped_data [i_nxt_y],
&clip_win, chart->style.line_width, line_color);
}
else
{
double current[2] = {mapped_data[i_cur_x], mapped_data[i_cur_y]};
double next[2] = {mapped_data [i_nxt_x], mapped_data [i_nxt_y]};
// modifies `current` and `next`
uint8_t flag_accept = _lui_clip_line(current, next, &clip_win);
if (flag_accept)
{
lui_gfx_draw_line_clipped(
current[0], current[1], next[0], next[1],
&clip_win, chart->style.line_width, line_color);
}
else
continue;
}
}
// Draw point only if point draw mode enabled and points are within the clip area/window
if (chart->style.draw_mode & LUI_LINECHART_DRAW_MODE_POINT)
{
if (mapped_data[i_cur_x] >= clip_win.x && mapped_data[i_cur_x] <= clip_win.x + clip_win.w - 1 &&
mapped_data[i_cur_y] >= clip_win.y && mapped_data[i_cur_y] <= clip_win.y + clip_win.h - 1)
{
double px = mapped_data[i_cur_x] - chart->style.point_width / 2;
double py = mapped_data[i_cur_y] - chart->style.point_width / 2;
lui_gfx_draw_rect_fill_clipped(px, py, chart->style.point_width, chart->style.point_width, &clip_win, chart->style.point_color);
}
// draw the last remaining point
if (i == chart->data.points - 2 &&
mapped_data[i_nxt_x] >= clip_win.x && mapped_data[i_nxt_x] <= clip_win.x + clip_win.w - 1 &&
mapped_data[i_nxt_y] >= clip_win.y && mapped_data[i_nxt_y] <= clip_win.y + clip_win.h - 1)
{
double px = mapped_data[i_nxt_x] - chart->style.point_width / 2.;
double py = mapped_data[i_nxt_y] - chart->style.point_width / 2.;
lui_gfx_draw_rect_fill_clipped(px, py, chart->style.point_width, chart->style.point_width, &clip_win, chart->style.point_color);
}
}
}
// Draw the chart border if needed
if (obj->common_style.border_width)
{
lui_gfx_draw_rect(temp_x, temp_y, width, height, obj->common_style.border_width, obj->common_style.border_color);
}
}
/*
* Initialize a line chart with default values
*/
lui_obj_t* lui_linechart_create()
{
// if total created objects become more than max allowed objects, don't create the object
if ( g_lui_main->total_created_objects + 1 > LUI_MAX_OBJECTS)
return NULL;
g_lui_main->total_created_objects++;
lui_chart_t* initial_line_chart = (lui_chart_t* )_lui_mem_alloc(sizeof(*initial_line_chart));
if (initial_line_chart == NULL)
return NULL;
double tmp_data[] = {0};
initial_line_chart->data.source = tmp_data;
initial_line_chart->data.y_max_value = 0;
initial_line_chart->data.y_min_value = g_lui_main->disp_drv->display_vert_res;
initial_line_chart->data.points = 0;
initial_line_chart->data.auto_scale = 1;
initial_line_chart->style.line_color = LUI_STYLE_LINECHART_LINE_COLOR;
initial_line_chart->style.grid_color = LUI_STYLE_LINECHART_GRID_COLOR;
initial_line_chart->style.grid_visible = LUI_STYLE_LINECHART_GRID_VISIBLE;
initial_line_chart->style.line_width = 2;
initial_line_chart->style.point_width = 7;
initial_line_chart->style.point_color = LUI_STYLE_LINECHART_POINT_COLOR;
initial_line_chart->style.draw_mode = LUI_LINECHART_DRAW_MODE_LINE | LUI_LINECHART_DRAW_MODE_POINT;
initial_line_chart->grid.hor_count = 5;
initial_line_chart->grid.vert_count = 5;
initial_line_chart->font = g_lui_main->default_font;
lui_obj_t* obj = _lui_object_create();
if (obj == NULL)
return NULL;
// object type
obj->obj_type = LUI_OBJ_LINECHART;
// object common style
obj->common_style.border_color = LUI_STYLE_LINECHART_BORDER_COLOR;
obj->common_style.border_width = LUI_STYLE_LINECHART_BORDER_THICKNESS;
obj->common_style.bg_color = LUI_STYLE_LINECHART_BG_COLOR;
obj->common_style.height = LUI_STYLE_LINECHART_HEIGHT;
obj->common_style.width = LUI_STYLE_LINECHART_WIDTH;
obj->obj_main_data = (void* )initial_line_chart;
return obj;
}
lui_obj_t* lui_linechart_create_and_add(lui_obj_t* obj_parent)
{
_LUI_CREATE_AND_ADD(linechart, obj_parent)
}
void lui_linechart_set_grid_count(lui_obj_t* obj, uint16_t hor_lines, uint16_t vert_lines)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->grid.hor_count == hor_lines && chart->grid.vert_count == vert_lines)
return;
_lui_object_set_need_refresh(obj);
chart->grid.hor_count = hor_lines;
chart->grid.vert_count = vert_lines;
}
void lui_linechart_set_grid_color(lui_obj_t* obj, uint16_t color)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.grid_color == color)
return;
_lui_object_set_need_refresh(obj);
chart->style.grid_color = color;
}
void lui_linechart_set_grid_visible(lui_obj_t* obj, uint8_t state)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.grid_visible == state)
return;
_lui_object_set_need_refresh(obj);
chart->style.grid_visible = state;
}
void lui_linechart_set_line_color(lui_obj_t* obj, uint16_t line_color)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.line_color == line_color)
return;
chart->style.line_color = line_color;
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_line_width(lui_obj_t* obj, uint8_t line_width)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.line_width == line_width)
return;
chart->style.line_width = _LUI_MAX(line_width, 1);
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_point_color(lui_obj_t* obj, uint16_t point_color)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.point_color == point_color)
return;
chart->style.point_color = point_color;
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_point_width(lui_obj_t* obj, uint8_t point_width)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.point_width == point_width)
return;
chart->style.point_width = _LUI_MAX(point_width, 1);
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_draw_mode(lui_obj_t* obj, uint8_t mode_flag)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
if (mode_flag == 0 || mode_flag > 3)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->style.draw_mode == mode_flag)
return;
chart->style.draw_mode = mode_flag;
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_data_auto_scale(lui_obj_t* obj, uint8_t auto_scale)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (auto_scale == chart->data.auto_scale)
return;
chart->data.auto_scale = auto_scale ? 1 : 0;
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_data_range(lui_obj_t* obj, double y_min, double y_max)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
if (chart->data.y_max_value == y_max && chart->data.y_min_value == y_min && chart->data.auto_scale == 0)
return;
chart->data.y_max_value = y_max;
chart->data.y_min_value = y_min;
chart->data.auto_scale = 0;
_lui_object_set_need_refresh(obj);
}
void lui_linechart_set_data_source(lui_obj_t* obj, double *source, uint16_t points)
{
if (_lui_verify_obj(obj, LUI_OBJ_LINECHART) < 0)
return;
lui_chart_t* chart = (lui_chart_t* )(obj->obj_main_data);
// if (chart->data.points == points)
// return;
_lui_object_set_need_refresh(obj);
chart->data.source = source;
chart->data.points = points;
}
#endif
/*-------------------------------------------------------------------------------
* END
*-------------------------------------------------------------------------------
*/
/*-------------------------------------------------------------------------------
* LUI_BUTTON related functions
*-------------------------------------------------------------------------------
*/
/*
* Draw a button
*/
void lui_button_draw(lui_obj_t* obj)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
if (!(obj->visible))
return;
// if no display driver is registered, return
if (_lui_disp_drv_check() == 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
uint8_t padding = 2;
uint16_t temp_x = obj->x;
uint16_t temp_y = obj->y;
uint16_t btn_height = obj->common_style.height;
uint16_t btn_width = obj->common_style.width;
uint16_t str_dim[2];
/* If button's background is transparent, draw parent's bg color or parent's bitmap as bg */
if (obj->parent && btn->style.is_transparent_bg && obj->state != LUI_STATE_SELECTED)
{
/* NOTE: panel and scene both have same first items in the struct. So even if
* the parent is scene, we can use lui_panel_t for casting.
*/
lui_panel_t* panel = (lui_panel_t* )(obj->parent->obj_main_data);
if (panel->bg_image)
{
lui_area_t bmp_crop;
const lui_bitmap_t* bg_bmp = panel->bg_image;
bmp_crop.x = temp_x - obj->parent->x;
bmp_crop.y = temp_y - obj->parent->y;
bmp_crop.w = btn_width;
bmp_crop.h = btn_height;
lui_gfx_draw_bitmap(bg_bmp, &panel->img_pal, temp_x, temp_y, &bmp_crop);
}
else
{
lui_gfx_draw_rect_fill(temp_x, temp_y, btn_width, btn_height, obj->parent->common_style.bg_color);
}
}
/* Else draw the button's bg color depending on its current state */
else
{
uint16_t btn_color = obj->common_style.bg_color;
if (obj->state == LUI_STATE_SELECTED)
btn_color = btn->style.selection_color;
else if (obj->state == LUI_STATE_PRESSED || (btn->is_checkable && obj->value))
btn_color = btn->style.pressed_color;
// else if (btn->state == LUI_STATE_IDLE)
// btn_color = btn->color;
lui_gfx_draw_rect_fill(temp_x, temp_y, btn_width, btn_height, btn_color);
}
/* Draw background bitmap if not NULL */
if (btn->img_idle || btn->img_pressed)
{
lui_area_t crop = {
.x = 0,
.y = 0,
.w = obj->common_style.width,
.h = obj->common_style.height
};
if ((obj->state == LUI_STATE_PRESSED || (btn->is_checkable && obj->value)) &&
btn->img_pressed)
{
lui_gfx_draw_bitmap(
btn->img_pressed,
&btn->img_press_pal,
temp_x, temp_y,
&crop);
}
else if (obj->state == LUI_STATE_IDLE && btn->img_idle)
{
lui_gfx_draw_bitmap(
btn->img_idle,
&btn->img_idle_pal,
temp_x, temp_y,
&crop);
}
}
/* Draw the button label (text) if not NULL */
if (btn->label.text && btn->label.text[0] != '\0')
{
uint16_t lbl_color = btn->style.label_color;
const char* lbl_txt = btn->label.text;
if (obj->state == LUI_STATE_PRESSED || (btn->is_checkable && obj->value))
{
lbl_color = btn->style.label_pressed_color;
lbl_txt = btn->label.text_pressed;
if (lbl_txt == NULL || lbl_txt[0] == '\0')
return;
}
lui_gfx_get_string_dimension(lbl_txt, btn->label.font, btn_width, str_dim);
str_dim[0] = str_dim[0] > btn_width ? btn_width : str_dim[0];
str_dim[1] = str_dim[1] > btn_height ? btn_height : str_dim[1];
temp_y = temp_y + (btn_height - str_dim[1]) / 2;
if (btn->label.text_align == LUI_ALIGN_CENTER)
{
temp_x = temp_x + (btn_width - str_dim[0]) / 2;
}
else if (btn->label.text_align == LUI_ALIGN_RIGHT)
{
temp_x = temp_x + (btn_width - str_dim[0]) - padding;
}
else
{
temp_x = temp_x + padding;
}
lui_area_t btn_lbl_area = {
.x = temp_x,
.y = temp_y,
.w = str_dim[0],
.h = str_dim[1]
};
lui_gfx_draw_string_advanced(lbl_txt, &btn_lbl_area, lbl_color, 0, NULL, NULL, NULL, 0, btn->label.font);
}
/* Finally Draw the border if needed */
if (obj->common_style.border_width)
{
lui_gfx_draw_rect(
obj->x, obj->y, btn_width, btn_height,
obj->common_style.border_width,
obj->common_style.border_color);
}
}
/*
* Create a button with default variables
*/
lui_obj_t* lui_button_create()
{
// if total created objects become more than max allowed objects, don't create the object
if ( g_lui_main->total_created_objects + 1 > LUI_MAX_OBJECTS)
return NULL;
g_lui_main->total_created_objects++;
lui_button_t* initial_button = (lui_button_t* )_lui_mem_alloc(sizeof(*initial_button));
if (initial_button == NULL)
return NULL;
initial_button->style.pressed_color = LUI_STYLE_BUTTON_PRESSED_COLOR;
initial_button->style.selection_color = LUI_STYLE_BUTTON_SELECTION_COLOR;
initial_button->style.label_color = LUI_STYLE_BUTTON_LABEL_COLOR;
initial_button->style.label_pressed_color = LUI_STYLE_BUTTON_LABEL_COLOR;
initial_button->style.is_transparent_bg = 0;
initial_button->img_idle = NULL;
initial_button->img_pressed = NULL;
initial_button->img_idle_pal.fore_color = LUI_STYLE_BUTTON_LABEL_COLOR;
initial_button->img_idle_pal.back_color = LUI_STYLE_BUTTON_BG_COLOR;
initial_button->img_idle_pal.is_backgrnd = 1;
initial_button->img_press_pal.fore_color = LUI_STYLE_BUTTON_LABEL_COLOR;
initial_button->img_press_pal.back_color = LUI_STYLE_BUTTON_BG_COLOR;
initial_button->img_press_pal.is_backgrnd = 1;
initial_button->is_checkable = 0;
initial_button->label.text = NULL;
initial_button->label.text_pressed = NULL;
initial_button->label.font = g_lui_main->default_font;
initial_button->label.text_align = LUI_ALIGN_CENTER;
lui_obj_t* obj = _lui_object_create();
if (obj == NULL)
return NULL;
// object type
obj->obj_type = LUI_OBJ_BUTTON;
obj->enabled = 1;
// object common style
obj->common_style.bg_color = LUI_STYLE_BUTTON_BG_COLOR;
obj->common_style.border_color = LUI_STYLE_BUTTON_BORDER_COLOR;
obj->common_style.border_width = LUI_STYLE_BUTTON_BORDER_THICKNESS;
obj->common_style.width = LUI_STYLE_BUTTON_WIDTH;
obj->common_style.height = LUI_STYLE_BUTTON_HEIGHT;
obj->obj_main_data = (void* )initial_button;
return obj;
}
lui_obj_t* lui_button_create_and_add(lui_obj_t* obj_parent)
{
_LUI_CREATE_AND_ADD(button, obj_parent)
}
void lui_button_set_label_texts(lui_obj_t* obj, const char* idle_text, const char* pressed_text)
{
lui_button_set_label_text(obj, idle_text);
lui_button_set_label_text_pressed(obj, pressed_text);
}
void lui_button_set_label_text(lui_obj_t* obj, const char* text)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
btn->label.text = text;
btn->label.text_pressed = text;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_label_text_pressed(lui_obj_t* obj, const char* pressed_text)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
btn->label.text_pressed = pressed_text;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_label_align(lui_obj_t *obj, uint8_t alignment)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
if (btn->label.text_align != alignment)
{
btn->label.text_align = alignment;
_lui_object_set_need_refresh(obj);
}
}
void lui_button_set_label_colors(lui_obj_t* obj, uint16_t idle_color, uint16_t pressed_color)
{
lui_button_set_label_color(obj, idle_color);
lui_button_set_label_color_pressed(obj, pressed_color);
}
void lui_button_set_label_color(lui_obj_t* obj, uint16_t color)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
if (btn->style.label_color == color)
return;
btn->style.label_color = color;
btn->style.label_pressed_color = color;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_label_color_pressed(lui_obj_t* obj, uint16_t pressed_color)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
if (btn->style.label_pressed_color == pressed_color)
return;
btn->style.label_pressed_color = pressed_color;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_label_font(lui_obj_t* obj, const lui_font_t* font)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
btn->label.font = (lui_font_t* )font;
// parent needs refresh (along with all its children)
_lui_object_set_need_refresh(obj->parent);
}
void lui_button_set_bitmap_images(lui_obj_t* obj, const lui_bitmap_t* idle_bitmap, const lui_bitmap_t* pressed_bitmap)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
if (idle_bitmap && pressed_bitmap)
btn->style.is_transparent_bg = 1;
else
btn->style.is_transparent_bg = 0;
btn->img_idle = idle_bitmap;
btn->img_pressed = pressed_bitmap;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_bitmap_images_mono_palette(lui_obj_t* obj, lui_bitmap_mono_pal_t* idle_palette, lui_bitmap_mono_pal_t* press_palette)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
if (idle_palette)
btn->img_idle_pal = *idle_palette;
if (press_palette)
btn->img_press_pal = *press_palette;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_value(lui_obj_t* obj, uint8_t value)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
if (obj->value == value || !btn->is_checkable)
return;
obj->value = value ? 1 : 0;
_lui_object_set_need_refresh(obj);
}
void lui_button_set_checked(lui_obj_t* obj)
{
lui_button_set_value(obj, 1);
}
void lui_button_set_unchecked(lui_obj_t* obj)
{
lui_button_set_value(obj, 0);
}
void lui_button_set_checkable(lui_obj_t* obj, uint8_t is_checkable)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
btn->is_checkable = is_checkable ? 1 : 0;
}
uint8_t lui_button_get_checkable(lui_obj_t* obj)
{
if (_lui_verify_obj(obj, LUI_OBJ_BUTTON) < 0)
return 0;
lui_button_t* btn = (lui_button_t* )(obj->obj_main_data);
return btn->is_checkable;