Draft version for supporting change background color

labelImg.py

@@ -183,6 +183,7 @@ class MainWindow(QMainWindow, WindowMixin):
         action = partial(newAction, self)
         quit = action('&Quit', self.close,
                 'Ctrl+Q', 'quit', u'Quit application')
+
         open = action('&Open', self.openFile,
                 'Ctrl+O', 'open', u'Open image or label file')
 
@@ -212,6 +213,8 @@ class MainWindow(QMainWindow, WindowMixin):
                 'Ctrl+L', 'color_line', u'Choose Box line color')
         color2 = action('Box &Fill Color', self.chooseColor2,
                 'Ctrl+Shift+L', 'color', u'Choose Box fill color')
+        color3 = action('Bakground Color', self.chooseColor3,
+                'Ctrl+Shift+B', 'color', u'Choose background color')
 
         createMode = action('Create\nRectBox', self.setCreateMode,
                 'Ctrl+N', 'new', u'Start drawing Boxs', enabled=False)
@@ -294,7 +297,7 @@ class MainWindow(QMainWindow, WindowMixin):
 
         # Store actions for further handling.
         self.actions = struct(save=save, saveAs=saveAs, open=open, close=close,
-                lineColor=color1, fillColor=color2,
+                lineColor=color1, fillColor=color2, backgroundColor=color3,
                 create=create, delete=delete, edit=edit, copy=copy,
                 createMode=createMode, editMode=editMode, advancedMode=advancedMode,
                 shapeLineColor=shapeLineColor, shapeFillColor=shapeFillColor,
@@ -303,7 +306,7 @@ class MainWindow(QMainWindow, WindowMixin):
                 zoomActions=zoomActions,
                 fileMenuActions=(open,opendir,save,saveAs,close,quit),
                 beginner=(), advanced=(),
-                editMenu=(edit, copy, delete, None, color1, color2),
+                editMenu=(edit, copy, delete, None, color1, color2, color3),
                 beginnerContext=(create, edit, copy, delete),
                 advancedContext=(createMode, editMode, edit, copy,
                     delete, shapeLineColor, shapeFillColor),
@@ -355,6 +358,7 @@ class MainWindow(QMainWindow, WindowMixin):
         self.maxRecent = 7
         self.lineColor = None
         self.fillColor = None
+        self.backgroundColor = None
         self.zoom_level = 100
         self.fit_window = False
 
@@ -370,6 +374,7 @@ class MainWindow(QMainWindow, WindowMixin):
                 'window/geometry': QByteArray,
                 'line/color': QColor,
                 'fill/color': QColor,
+                'background/color': QColor,
                 'advanced': bool,
                 # Docks and toolbars:
                 'window/state': QByteArray,
@@ -385,6 +390,7 @@ class MainWindow(QMainWindow, WindowMixin):
                 'window/geometry': QByteArray,
                 'line/color': QColor,
                 'fill/color': QColor,
+                'background/color': QColor,
                 'advanced': bool,
                 # Docks and toolbars:
                 'window/state': QByteArray,
@@ -410,6 +416,7 @@ class MainWindow(QMainWindow, WindowMixin):
         self.restoreState(settings.get('window/state', QByteArray()))
         self.lineColor = QColor(settings.get('line/color', Shape.line_color))
         self.fillColor = QColor(settings.get('fill/color', Shape.fill_color))
+        self.backgroundColor = QColor(settings.get('background/color', QColor(0, 0, 0, 0)))
         Shape.line_color = self.lineColor
         Shape.fill_color = self.fillColor
 
@@ -853,6 +860,7 @@ class MainWindow(QMainWindow, WindowMixin):
         s['window/state'] = self.saveState()
         s['line/color'] = self.lineColor
         s['fill/color'] = self.fillColor
+        s['background/color'] = self.backgroundColor
         s['recentFiles'] = self.recentFiles
         s['advanced'] = not self._beginner
         if self.defaultSaveDir is not None and len(self.defaultSaveDir) > 1:
@@ -1085,6 +1093,16 @@ class MainWindow(QMainWindow, WindowMixin):
             self.canvas.update()
             self.setDirty()
 
+    def chooseColor3(self):
+       color = self.colorDialog.getColor(self.backgroundColor, u'Choose background color',
+                default=DEFAULT_FILL_COLOR)
+
+       if color:
+            self.backgroundColor = color
+            palette = QPalette(self)
+            palette.setColor(self.backgroundRole(), color)
+            self.setPalette(palette)
+
     def deleteSelectedShape(self):
         yes, no = QMessageBox.Yes, QMessageBox.No
         msg = u'You are about to permanently delete this Box, proceed anyway?'