Allow holding shift to delete polys without confirmation

Author: akx

labelme/app.py

@@ -19,12 +19,15 @@
 from labelme import PY2
 from labelme import __appname__
 from labelme import ai
+from labelme import utils
 from labelme.ai import MODELS
 from labelme.config import get_config
 from labelme.label_file import LabelFile
 from labelme.label_file import LabelFileError
 from labelme.logger import logger
 from labelme.shape import Shape
+from labelme.utils.qt import shift_and_ctrl_pressed
+from labelme.utils.qt import shift_pressed
 from labelme.widgets import AiPromptWidget
 from labelme.widgets import BrightnessContrastDialog
 from labelme.widgets import Canvas
@@ -36,8 +39,6 @@
 from labelme.widgets import UniqueLabelQListWidget
 from labelme.widgets import ZoomWidget
 
-from . import utils
-
 # FIXME
 # - [medium] Set max zoom value to something big enough for FitWidth/Window
 
@@ -410,7 +411,10 @@ def __init__(
             self.deleteSelectedShape,
             shortcuts["delete_polygon"],
             "cancel",
-            self.tr("Delete the selected polygons"),
+            "{} {}".format(
+                self.tr("Delete the selected polygons"),
+                self.tr("(Hold Shift to skip confirmation)"),
+            ),
             enabled=False,
         )
         duplicate = action(
@@ -1857,9 +1861,7 @@ def loadRecent(self, filename):
 
     def openPrevImg(self, _value=False):
         keep_prev = self._config["keep_prev"]
-        if QtWidgets.QApplication.keyboardModifiers() == (
-            Qt.ControlModifier | Qt.ShiftModifier
-        ):
+        if shift_and_ctrl_pressed():
             self._config["keep_prev"] = True
 
         if not self.mayContinue():
@@ -1881,9 +1883,7 @@ def openPrevImg(self, _value=False):
 
     def openNextImg(self, _value=False, load=True):
         keep_prev = self._config["keep_prev"]
-        if QtWidgets.QApplication.keyboardModifiers() == (
-            Qt.ControlModifier | Qt.ShiftModifier
-        ):
+        if shift_and_ctrl_pressed():
             self._config["keep_prev"] = True
 
         if not self.mayContinue():
@@ -2117,8 +2117,12 @@ def deleteSelectedShape(self):
         msg = self.tr(
             "You are about to permanently delete {} polygons, " "proceed anyway?"
         ).format(len(self.canvas.selectedShapes))
-        if yes == QtWidgets.QMessageBox.warning(
-            self, self.tr("Attention"), msg, yes | no, yes
+
+        if shift_pressed() or (
+            yes
+            == QtWidgets.QMessageBox.warning(
+                self, self.tr("Attention"), msg, yes | no, yes
+            )
         ):
             self.remLabels(self.canvas.deleteSelected())
             self.setDirty()

labelme/utils/qt.py

@@ -96,3 +96,13 @@ def distancetoline(point, line):
 def fmtShortcut(text):
     mod, key = text.split("+", 1)
     return "<b>%s</b>+<b>%s</b>" % (mod, key)
+
+
+def shift_and_ctrl_pressed() -> bool:
+    return QtWidgets.QApplication.keyboardModifiers() == (
+        QtCore.Qt.ControlModifier | QtCore.Qt.ShiftModifier
+    )
+
+
+def shift_pressed() -> bool:
+    return bool(QtWidgets.QApplication.keyboardModifiers() & QtCore.Qt.ShiftModifier)