Add a reset button

src/ukatali/configuredialog.py

@@ -83,6 +83,16 @@ class ConfigureDialog(QtWidgets.QDialog):
         self.render_options_stack = QtWidgets.QStackedWidget(self)
         self.render_options_stack.setObjectName("render_options_stack")
         self.render_layout.addWidget(self.render_options_stack)
+        self.render_reset_layout = QtWidgets.QHBoxLayout()
+        self.render_reset_layout.setObjectName('render_reset_layout')
+        self.render_reset_layout.setSpacing(0)
+        self.render_reset_layout.setContentsMargins(0, 0, 0, 0)
+        self.render_reset_layout.addStretch()
+        self.render_reset_button = QtWidgets.QPushButton(self.renderer_page)
+        self.render_reset_button.setIcon(QtGui.QIcon.fromTheme('edit-reset'))
+        self.render_reset_button.setObjectName('render_reset_button')
+        self.render_reset_layout.addWidget(self.render_reset_button)
+        self.render_layout.addLayout(self.render_reset_layout)
         # Export settings
         self.export_page = QtWidgets.QWidget()
         self.export_page.setObjectName('export_page')
@@ -163,6 +173,7 @@ class ConfigureDialog(QtWidgets.QDialog):
         self.export_margin_bottom_spinbox.valueChanged.connect(on_export_margin_bottom_changed)
         on_export_orientation_portait_clicked = partial(self._set_export_value, 'orientation')
         self.export_orientation_portrait_radio.toggled.connect(on_export_orientation_portait_clicked)
+        self.render_reset_button.clicked.connect(self.on_reset_button_clicked)
 
     def retranslate_ui(self):
         _translate = QtCore.QCoreApplication.translate
@@ -173,6 +184,9 @@ class ConfigureDialog(QtWidgets.QDialog):
         self.category_list_widget.item(3).setText(_translate('ConfigureDialog', 'PDF'))
         self.export_orientation_portrait_radio.setText(_translate('ConfigureDialog', 'Portrait'))
         self.export_orientation_landscape_radio.setText(_translate('ConfigureDialog', 'Landscape'))
+        self.render_reset_button.setText(_translate('ConfigureDialog', 'Reset values'))
+        self.render_reset_button.setToolTip(_translate('ConfigureDialog',
+                                                       'Reset the values for this option to the defaults'))
 
     def _set_option_value(self, name, value):
         """Set an option value"""
@@ -192,6 +206,26 @@ class ConfigureDialog(QtWidgets.QDialog):
             value = QtGui.QPageLayout.Portrait if value else QtGui.QPageLayout.Landscape
         self.export_values[name] = value
 
+    def on_reset_button_clicked(self):
+        """Reset all the values for the current option group"""
+        current_group = self.render_options_combobox.currentText().replace(' ', '_').lower()
+        self.settings.beginGroup('render')
+        for name, details in get_options(current_group).items():
+            if name in self.option_values:
+                del self.option_values[name]
+            if self.settings.contains(name):
+                self.settings.remove(name)
+                if details['type'] is int:
+                    self.option_widgets[name].setValue(details['default'])
+                elif details['type'] is bool:
+                    self.option_widgets[name].setChecked(details['default'])
+                elif 'font' in name:
+                    value = QtGui.QFont(details['default'])
+                    self.option_widgets[name].setCurrentFont(value)
+                else:
+                    self.option_widgets[name].setText(details['default'])
+        self.settings.endGroup()
+
     def setup_options(self):
         for group in get_option_groups():
             pretty_group = group.replace('_', ' ').title()