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guix/samples/demo_guix_smart_watch/calculator.c
Scott Larson 4dfb8c3da4 update to v6.1.3
2021-01-07 15:25:36 -08:00

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8.5 KiB
C
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/* This is a small demo of the high-performance GUIX graphics framework. */
#include "demo_guix_smart_watch.h"
#define TYPE_OPERAND 1
#define TYPE_OPERATION 2
#define TYPE_DOT 3
#define TYPE_FUNCTION 4
GX_BOOL is_string_float(GX_CHAR *string);
GX_BOOL do_input_buffer_clear = GX_FALSE;
GX_BOOL is_input_value_float = GX_FALSE;
typedef struct
{
GX_CHAR *text;
USHORT widget_id;
USHORT event_type;
LONG type;
} KEY_INFO_ENTRY;
KEY_INFO_ENTRY key_info[] = {
{ "0", ID_CALCULATOR_0, GX_SIGNAL(ID_CALCULATOR_0, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "1", ID_CALCULATOR_1, GX_SIGNAL(ID_CALCULATOR_1, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "2", ID_CALCULATOR_2, GX_SIGNAL(ID_CALCULATOR_2, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "3", ID_CALCULATOR_3, GX_SIGNAL(ID_CALCULATOR_3, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "4", ID_CALCULATOR_4, GX_SIGNAL(ID_CALCULATOR_4, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "5", ID_CALCULATOR_5, GX_SIGNAL(ID_CALCULATOR_5, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "6", ID_CALCULATOR_6, GX_SIGNAL(ID_CALCULATOR_6, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "7", ID_CALCULATOR_7, GX_SIGNAL(ID_CALCULATOR_7, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "8", ID_CALCULATOR_8, GX_SIGNAL(ID_CALCULATOR_8, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "9", ID_CALCULATOR_9, GX_SIGNAL(ID_CALCULATOR_9, GX_EVENT_CLICKED), TYPE_OPERAND },
{ "+", ID_CALCULATOR_PLUS, GX_SIGNAL(ID_CALCULATOR_PLUS, GX_EVENT_CLICKED), TYPE_OPERATION },
{ "-", ID_CALCULATOR_MINUS, GX_SIGNAL(ID_CALCULATOR_MINUS, GX_EVENT_CLICKED), TYPE_OPERATION },
{ "*", ID_CALCULATOR_MULTI, GX_SIGNAL(ID_CALCULATOR_MULTI, GX_EVENT_CLICKED), TYPE_OPERATION },
{ "/", ID_CALCULATOR_DIVIDE, GX_SIGNAL(ID_CALCULATOR_DIVIDE, GX_EVENT_CLICKED), TYPE_OPERATION },
{ ".", ID_CALCULATOR_DOT, GX_SIGNAL(ID_CALCULATOR_DOT, GX_EVENT_CLICKED), TYPE_DOT },
{ "C", ID_CALCULATOR_C, 0, TYPE_FUNCTION },
{ "+/-", ID_CALCULATOR_SIGN, 0, TYPE_FUNCTION },
{ "=", ID_CALCULATOR_RESULT, 0, TYPE_FUNCTION },
{ "%", ID_CALCULATOR_PERCENT, 0, TYPE_FUNCTION },
{ GX_NULL, 0, 0, 0 }
};
/*************************************************************************************/
VOID calculator_pixelmap_button_draw(GX_PIXELMAP_BUTTON *key)
{
/* Custom pixelmap button draw. */
GX_RESOURCE_ID font_id = GX_FONT_ID_MIDDLE_30;
KEY_INFO_ENTRY *pKeyInfo = key_info;
INT x_offset = 0;
INT y_offset = 0;
GX_PIXELMAP *map;
GX_COLOR fill_color;
GX_STRING string;
gx_context_pixelmap_get(key->gx_pixelmap_button_normal_id, &map);
while (pKeyInfo->text)
{
if (pKeyInfo->widget_id == key->gx_widget_id)
{
if (key->gx_widget_style & GX_STYLE_BUTTON_PUSHED)
{
fill_color = key->gx_widget_selected_fill_color;
x_offset++;
y_offset++;
}
else
{
fill_color = key->gx_widget_normal_fill_color;
}
if (map)
{
gx_context_fill_color_set(fill_color);
gx_canvas_pixelmap_draw(key->gx_widget_size.gx_rectangle_left + x_offset,
key->gx_widget_size.gx_rectangle_top + y_offset, map);
}
else
{
string.gx_string_ptr = pKeyInfo->text;
string.gx_string_length = string_length_get(string.gx_string_ptr, MAX_KEY_LENGTH);
gx_widget_text_draw_ext(key, fill_color,
font_id, &string,
x_offset, y_offset);
}
break;
}
pKeyInfo++;
}
}
/*************************************************************************************/
UINT calculator_screen_event_handler(GX_WINDOW *window, GX_EVENT *event_ptr)
{
GX_SINGLE_LINE_TEXT_INPUT *text_input;
KEY_INFO_ENTRY *pKeyInfo = key_info;
GX_CHAR pre_char = '\0';
INT string_size;
GX_CHAR *result;
text_input = &calculator_screen.calculator_screen_text_input;
if ((event_ptr->gx_event_type & GX_SIGNAL_EVENT_MASK) == GX_EVENT_CLICKED)
{
while (pKeyInfo->text)
{
if (pKeyInfo->event_type == event_ptr->gx_event_type)
{
if (do_input_buffer_clear)
{
if ((pKeyInfo->text[0] >= '0') && (pKeyInfo->text[0] <= '9'))
{
/* Clear input buffer. */
gx_single_line_text_input_buffer_clear(text_input);
}
else if (!strcmp(text_input->gx_single_line_text_input_buffer, "Error Format"))
{
return 0;
}
do_input_buffer_clear = GX_FALSE;
}
string_size = text_input->gx_single_line_text_input_string_size;
if (string_size)
{
/* Get previous character. */
pre_char = text_input->gx_single_line_text_input_buffer[string_size - 1];
}
if (pKeyInfo->type == TYPE_OPERAND)
{
if ((pre_char == '0') && (string_size == 1))
{
gx_single_line_text_input_backspace(text_input);
}
else if ((pre_char == '/') && (pKeyInfo->text[0] == '0'))
{
return 0;
}
gx_single_line_text_input_character_insert(text_input, (GX_UBYTE *)&pKeyInfo->text[0], 1);
}
else if (string_size)
{
if ((pre_char >= '0') && (pre_char <= '9'))
{
if (pKeyInfo->type == TYPE_OPERATION)
{
gx_single_line_text_input_character_insert(text_input, (GX_UBYTE *)&pKeyInfo->text[0], 1);
is_input_value_float = GX_FALSE;
}
else if ((pKeyInfo->type == TYPE_DOT) && !is_input_value_float)
{
gx_single_line_text_input_character_insert(text_input, (GX_UBYTE *)&pKeyInfo->text[0], 1);
is_input_value_float = GX_TRUE;
}
}
}
return 0;
}
pKeyInfo++;
}
}
switch (event_ptr->gx_event_type)
{
case GX_SIGNAL(ID_CALCULATOR_C, GX_EVENT_CLICKED):
/* Clear input buffer. */
gx_single_line_text_input_buffer_clear(text_input);
is_input_value_float = GX_FALSE;
break;
case GX_SIGNAL(ID_CALCULATOR_RESULT, GX_EVENT_CLICKED):
if (string_length_get(text_input->gx_single_line_text_input_buffer, MAX_EXPRESSION_LENGTH) > 0)
{
/* Evaluate expression. */
result = expression_evaluate(text_input->gx_single_line_text_input_buffer, GX_FALSE);
is_input_value_float = is_string_float(result);
/* Clear input buffer. */
gx_single_line_text_input_buffer_clear(text_input);
/* Show result. */
gx_single_line_text_input_character_insert(text_input, (GX_UBYTE *)result, string_length_get(result, MAX_EXPRESSION_LENGTH));
do_input_buffer_clear = GX_TRUE;
}
break;
case GX_SIGNAL(ID_CALCULATOR_PERCENT, GX_EVENT_CLICKED):
if (string_length_get(text_input->gx_single_line_text_input_buffer, MAX_EXPRESSION_LENGTH) > 0)
{
result = expression_evaluate(text_input->gx_single_line_text_input_buffer, GX_TRUE);
is_input_value_float = is_string_float(result);
/* Clear input buffer. */
gx_single_line_text_input_buffer_clear(text_input);
/* Show result. */
gx_single_line_text_input_character_insert(text_input, (GX_UBYTE *)result, string_length_get(result, MAX_EXPRESSION_LENGTH));
do_input_buffer_clear = GX_TRUE;
}
break;
default:
return template_main_event_handler(window, event_ptr);
}
return 0;
}
/* Check if a number string a float value. */
GX_BOOL is_string_float(GX_CHAR *string)
{
INT index = 0;
while (string[index])
{
if (string[index] == '.')
{
return GX_TRUE;
}
index++;
}
return GX_FALSE;
}
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