reimplement alpha slider

flatcamGUI/preferences/OptionUI.py

@@ -1,7 +1,8 @@
 from typing import Union
 
 from PyQt5 import QtWidgets
-from flatcamGUI.GUIElements import RadioSet, FCCheckBox, FCButton, FCComboBox, FCEntry, FCSpinner, FCColorEntry
+from flatcamGUI.GUIElements import RadioSet, FCCheckBox, FCButton, FCComboBox, FCEntry, FCSpinner, FCColorEntry, \
+    FCSliderWithSpinner
 
 import gettext
 import FlatCAMTranslation as fcTranslate
@@ -106,6 +107,18 @@ class ColorOptionUI(BasicOptionUI):
         return entry
 
 
+class SliderWithSpinnerOptionUI(BasicOptionUI):
+    def __init__(self, option: str, label_text: str, label_tooltip: str, min=0, max=100, step=1):
+        self.min = min
+        self.max = max
+        self.step = step
+        super().__init__(option=option, label_text=label_text, label_tooltip=label_tooltip)
+
+    def build_entry_widget(self) -> QtWidgets.QWidget:
+        entry = FCSliderWithSpinner(min=self.min, max=self.max, step=self.step)
+        return entry
+
+
 class HeadingOptionUI(OptionUI):
     def __init__(self, label_text: str, label_tooltip: Union[str, None]):
         super().__init__(option="__heading")

flatcamGUI/preferences/general/GeneralGUIPrefGroupUI.py

@@ -10,7 +10,8 @@ if '_' not in builtins.__dict__:
     _ = gettext.gettext
 
 from flatcamGUI.preferences.OptionUI import OptionUI, CheckboxOptionUI, RadioSetOptionUI, \
-    SeparatorOptionUI, HeadingOptionUI, ComboboxOptionUI, ColorOptionUI, FullWidthButtonOptionUI
+    SeparatorOptionUI, HeadingOptionUI, ComboboxOptionUI, ColorOptionUI, FullWidthButtonOptionUI, \
+    SliderWithSpinnerOptionUI
 
 
 class GeneralGUIPrefGroupUI(OptionsGroupUI2):
@@ -40,6 +41,16 @@ class GeneralGUIPrefGroupUI(OptionsGroupUI2):
             self.hdpi_field.set_value(False)
         self.hdpi_field.stateChanged.connect(self.handle_hdpi)
 
+        self.sel_line_field = self.option_dict()["global_sel_line"].get_field()
+        self.sel_fill_field = self.option_dict()["global_sel_fill"].get_field()
+        self.sel_alpha_field = self.option_dict()["_global_sel_alpha"].get_field()
+        self.sel_alpha_field.spinner.valueChanged.connect(self.on_sel_alpha_change)
+
+        self.alt_sel_line_field = self.option_dict()["global_alt_sel_line"].get_field()
+        self.alt_sel_fill_field = self.option_dict()["global_alt_sel_fill"].get_field()
+        self.alt_sel_alpha_field = self.option_dict()["_global_alt_sel_alpha"].get_field()
+        self.alt_sel_alpha_field.spinner.valueChanged.connect(self.on_alt_sel_alpha_change)
+
 
     def build_options(self) -> [OptionUI]:
         return [
@@ -117,7 +128,12 @@ class GeneralGUIPrefGroupUI(OptionsGroupUI2):
                               "First 6 digits are the color and the last 2\n"
                               "digits are for alpha (transparency) level."
             ),
-            # FIXME: opacity slider?
+            SliderWithSpinnerOptionUI(
+                option="_global_sel_alpha",
+                label_text="Alpha",
+                label_tooltip="Set the fill transparency for the 'left to right' selection box.",
+                min=0, max=255, step=1
+            ),
             SeparatorOptionUI(),
 
             HeadingOptionUI(label_text="Right-Left Selection Color", label_tooltip=None),
@@ -134,7 +150,12 @@ class GeneralGUIPrefGroupUI(OptionsGroupUI2):
                               "First 6 digits are the color and the last 2\n"
                               "digits are for alpha (transparency) level."
             ),
-            # FIXME: opacity slider?
+            SliderWithSpinnerOptionUI(
+                option="_global_alt_sel_alpha",
+                label_text="Alpha",
+                label_tooltip="Set the fill transparency for the 'right to left' selection box.",
+                min=0, max=255, step=1
+            ),
             SeparatorOptionUI(),
 
             HeadingOptionUI(label_text='Editor Color', label_tooltip=None),
@@ -171,6 +192,35 @@ class GeneralGUIPrefGroupUI(OptionsGroupUI2):
             ),
         ]
 
+    def on_sel_alpha_change(self):
+        alpha = self.sel_alpha_field.get_value()
+        fill = self._modify_color_alpha(color=self.sel_fill_field.get_value(), alpha=alpha)
+        self.sel_fill_field.set_value(fill)
+        line = self._modify_color_alpha(color=self.sel_line_field.get_value(), alpha=alpha)
+        self.sel_line_field.set_value(line)
+
+    def on_alt_sel_alpha_change(self):
+        alpha = self.alt_sel_alpha_field.get_value()
+        fill = self._modify_color_alpha(color=self.alt_sel_fill_field.get_value(), alpha=alpha)
+        self.alt_sel_fill_field.set_value(fill)
+        line = self._modify_color_alpha(color=self.alt_sel_line_field.get_value(), alpha=alpha)
+        self.alt_sel_line_field.set_value(line)
+
+
+
+    def _modify_color_alpha(self, color: str, alpha: int):
+        color_without_alpha = color[:7]
+        if alpha > 255:
+            return color_without_alpha + "FF"
+        elif alpha < 0:
+            return color_without_alpha + "00"
+        else:
+            hexalpha = hex(alpha)[2:]
+            if len(hexalpha) == 1:
+                hexalpha = "0" + hexalpha
+            return color_without_alpha + hexalpha
+
+
     def on_theme_change(self):
         # FIXME: this should be moved out to a view model
         val = self.theme_field.get_value()