bg_color specified as rrggbbaa instead of rrggbb, allow setting bg_co…

…lor with alpha!=0

src/sticker_convert/converter.py

@@ -186,8 +186,8 @@ def __init__(
 
         self.bg_color: Optional[Tuple[int, int, int, int]] = None
         if self.opt_comp.bg_color:
-            r, g, b = bytes.fromhex(self.opt_comp.bg_color)
-            self.bg_color = (r, g, b, 0)
+            r, g, b, a = bytes.fromhex(self.opt_comp.bg_color)
+            self.bg_color = (r, g, b, a)
 
         self.tmp_f: BytesIO = BytesIO()
         self.result: Optional[bytes] = None

src/sticker_convert/gui_components/windows/advanced_compression_window.py

@@ -580,9 +580,14 @@ def cb_disable_fake_vid(self, *_: Any) -> None:
         self.fake_vid_cbox.config(state=state)
 
     def cb_bg_color(self, *_: Any) -> None:
-        color = colorchooser.askcolor(title="Choose color")[1]
+        color_init = self.gui.bg_color_var.get()[:6]
+        color = colorchooser.askcolor(
+            title="Choose color",
+            initialcolor=color_init,
+            parent=self,
+        )[1]
         if color:
-            self.gui.bg_color_var.set(color.replace("#", ""))
+            self.gui.bg_color_var.set(color.replace("#", "") + "00")
         self.lift()
         self.attributes("-topmost", True)  # type: ignore
         self.attributes("-topmost", False)  # type: ignore

src/sticker_convert/resources/help.json

@@ -40,7 +40,7 @@
         "duration_min": "Set minimum output duration in miliseconds.",
         "duration_max": "Set maximum output duration in miliseconds.",
         "padding_percent": "Set percentage of space used as padding.",
-        "bg_color": "Set custom background color.\nExample: 00ff00 for green.\nIf this is not set, background color would be auto set to black if image is bright, or white if image is dark.\nNote: The color should not be visible if output format supports transparency.",
+        "bg_color": "Set custom background color in rrggbbaa format.\nExample: 00ff0000 for green with alpha 0.\nIf this is not set, background color would be auto set to black if image is bright, or white if image is dark.\nNote: The color should not be visible if output format supports transparency.",
         "size": "Set maximum file size in bytes for video and image.",
         "vid_size_max": "Set maximum file size limit for animated stickers.",
         "img_size_max": "Set maximum file size limit for static stickers.",