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Add RGBA Color Support

This commit is contained in:
daleclack 2023-09-09 21:26:01 +08:00
parent bfa65796bd
commit bbf0b24af6
1 changed files with 57 additions and 1 deletions
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58
Gtk4/gtk153_time_reminder/src/MyPrefs.cpp
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@ -41,6 +41,30 @@ static const char *color_strings[] =
"yellow",
NULL};
// Convert 2-bit 16numbers to 0-1 float for rgba
static float str16_to_rgb_float(char high_bit, char low_bit)
{
int rgba_255 = 0;
if (high_bit >= 'A')
{
rgba_255 += (high_bit - 'A' + 10) * 16;
}
else
{
rgba_255 += (high_bit - '0') * 16;
}
if (low_bit >= 'A')
{
rgba_255 += (low_bit - 'A' + 10);
}
else
{
rgba_255 += (low_bit - '0');
}
return rgba_255 / 255.0;
}
static void load_color(MyPrefs *prefs, std::string &color_str1)
{
if (color_str1[0] == '#')
@ -48,6 +72,22 @@ static void load_color(MyPrefs *prefs, std::string &color_str1)
// RGBA Color config
gtk_check_button_set_active(GTK_CHECK_BUTTON(prefs->check_rgba_color),
TRUE);
// Get color setting from color string
GdkRGBA rgba_color;
float red, green, blue, alpha;
red = str16_to_rgb_float(color_str1[1], color_str1[2]);
green = str16_to_rgb_float(color_str1[3], color_str1[4]);
blue = str16_to_rgb_float(color_str1[5], color_str1[6]);
alpha = str16_to_rgb_float(color_str1[7], color_str1[8]);
rgba_color.alpha = alpha;
rgba_color.blue = blue;
rgba_color.red = red;
rgba_color.green = green;
// Set rgba color for color button
gtk_color_dialog_button_set_rgba(
GTK_COLOR_DIALOG_BUTTON(prefs->color_button), &rgba_color);
}
else
{
@ -136,8 +176,24 @@ static void btnapply_clicked(GtkWidget *widget, MyPrefs *prefs)
{
guint index = gtk_drop_down_get_selected(GTK_DROP_DOWN(prefs->color_drop));
color_string1.append(color_strings[index]);
}else{
}
else
{
// Get GdkRGBA object for color
const GdkRGBA *rgba_color;
rgba_color = gtk_color_dialog_button_get_rgba(
GTK_COLOR_DIALOG_BUTTON(prefs->color_button));
// Convert color from (0,1) to (0,255)
int red = (rgba_color->red) * 255;
int green = (rgba_color->green) * 255;
int blue = (rgba_color->blue) * 255;
int alpha = (rgba_color->alpha) * 255;
// Format the color string to #XXXXXXXX
snprintf(prefs->color, 12, "#%02X%02X%02X%02X", red,
green, blue, alpha);
color_string1.append(prefs->color);
}
// Create json data