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color the text in the color wheel's color box such that it's readable no matter the background

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git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@388 b9cfdab3-6d41-4d17-bbe4-086880011989
This commit is contained in:
IoIxD
2025-10-17 00:51:26 +00:00
parent 758ae46138
commit 899944e571
1 changed files with 10 additions and 0 deletions
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10
examples/color_picker.c
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@@ -66,6 +66,7 @@ typedef struct {
double value;
unsigned char* color_wheel_image_data;
unsigned char* color_display_image_data;
MwPoint point;
} color_wheel;
void color_wheel_wheel_image_update(color_wheel* wheel) {
@@ -138,8 +139,17 @@ static void color_wheel_click(MwWidget handle, void* user, void* call) {
(void)a;
hexColor = malloc(8);
char* fgColor = malloc(8);
snprintf(hexColor, 8, "#%02X%02X%02X", r, g, b);
int fr = r > 128 ? 0 : 255;
int fg = g > 128 ? 0 : 255;
int fb = b > 128 ? 0 : 255;
snprintf(fgColor, 8, "#%02X%02X%02X", fr, fg, fb);
MwSetText(wheel->color_display, MwNbackground, hexColor);
MwSetText(wheel->color_display_text, MwNforeground, fgColor);
MwSetText(wheel->color_display_text, MwNbackground, hexColor);
MwSetText(wheel->color_display_text, MwNtext, hexColor);
free(hexColor);