Sketcher: [skip ci] explicit command to stop current operation

Fore more details: https://forum.freecadweb.org/viewtopic.php?f=3&t=42207

src/Mod/Sketcher/Gui/Command.cpp

@@ -328,6 +328,45 @@ bool CmdSketcherLeaveSketch::isActive(void)
     return false;
 }
 
+DEF_STD_CMD_A(CmdSketcherStopOperation)
+
+CmdSketcherStopOperation::CmdSketcherStopOperation()
+  : Command("Sketcher_StopOperation")
+{
+    sAppModule      = "Sketcher";
+    sGroup          = QT_TR_NOOP("Sketcher");
+    sMenuText       = QT_TR_NOOP("Stop operation");
+    sToolTipText    = QT_TR_NOOP("Stop current operation");
+    sWhatsThis      = "Sketcher_StopOperation";
+    sStatusTip      = sToolTipText;
+    sPixmap         = "process-stop";
+    eType           = 0;
+}
+
+void CmdSketcherStopOperation::activated(int iMsg)
+{
+    Q_UNUSED(iMsg);
+    Gui::Document *doc = getActiveGuiDocument();
+
+    if (doc) {
+        SketcherGui::ViewProviderSketch* vp = dynamic_cast<SketcherGui::ViewProviderSketch*>(doc->getInEdit());
+        if (vp) {
+            vp->purgeHandler();
+        }
+    }
+}
+
+bool CmdSketcherStopOperation::isActive(void)
+{
+    Gui::Document *doc = getActiveGuiDocument();
+    if (doc) {
+        SketcherGui::ViewProviderSketch* vp = dynamic_cast<SketcherGui::ViewProviderSketch*>(doc->getInEdit());
+        if (vp)
+            return true;
+    }
+    return false;
+}
+
 DEF_STD_CMD_A(CmdSketcherReorientSketch)
 
 CmdSketcherReorientSketch::CmdSketcherReorientSketch()
@@ -872,6 +911,7 @@ void CreateSketcherCommands(void)
     rcCmdMgr.addCommand(new CmdSketcherNewSketch());
     rcCmdMgr.addCommand(new CmdSketcherEditSketch());
     rcCmdMgr.addCommand(new CmdSketcherLeaveSketch());
+    rcCmdMgr.addCommand(new CmdSketcherStopOperation());
     rcCmdMgr.addCommand(new CmdSketcherReorientSketch());
     rcCmdMgr.addCommand(new CmdSketcherMapSketch());
     rcCmdMgr.addCommand(new CmdSketcherViewSketch());

src/Mod/Sketcher/Gui/ViewProviderSketch.cpp

@@ -401,6 +401,7 @@ void ViewProviderSketch::deactivateHandler()
         std::vector<Base::Vector2d> editCurve;
         editCurve.clear();
         drawEdit(editCurve); // erase any line
+        resetPositionText();
         edit->sketchHandler->deactivated(this);
         edit->sketchHandler->unsetCursor();
         delete(edit->sketchHandler);

src/Mod/Sketcher/Gui/Workbench.cpp

@@ -90,6 +90,7 @@ Gui::MenuItem* Workbench::setupMenuBar() const
     addSketcherWorkbenchVirtualSpace(*virtualspace);
 
     addSketcherWorkbenchSketchActions( *sketch );
+    *sketch << "Sketcher_StopOperation";
     *sketch << geom
             << cons
             << consaccel