Improve tooltip for tools Rotation, Flipping by line and Flipping by axis.

The app will show updated tooltip message in case a user selected point that is
already a part of the list of operated objects.

--HG--
branch : develop

src/libs/vtools/dialogs/tools/dialogflippingbyaxis.cpp

@@ -192,6 +192,7 @@ void DialogFlippingByAxis::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (objects.contains(id))
             {
+                emit ToolTip("Select origin point that is not part of the list of objects");
                 return;
             }
 

src/libs/vtools/dialogs/tools/dialogflippingbyline.cpp

@@ -189,14 +189,15 @@ void DialogFlippingByLine::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
-            if (objects.contains(id))
-            {
-                return;
-            }
-
             switch (number)
             {
                 case 0:
+                    if (objects.contains(id))
+                    {
+                        emit ToolTip("Select first line point that is not part of the list of objects");
+                        return;
+                    }
+
                     if (SetObject(id, ui->comboBoxFirstLinePoint, tr("Select second line point")))
                     {
                         number++;
@@ -207,6 +208,12 @@ void DialogFlippingByLine::ChosenObject(quint32 id, const SceneObject &type)
                     }
                     break;
                 case 1:
+                    if (objects.contains(id))
+                    {
+                        emit ToolTip("Select second line point that is not part of the list of objects");
+                        return;
+                    }
+
                     if (getCurrentObjectId(ui->comboBoxFirstLinePoint) != id)
                     {
                         if (SetObject(id, ui->comboBoxSecondLinePoint, ""))

src/libs/vtools/dialogs/tools/dialogrotation.cpp

@@ -234,6 +234,7 @@ void DialogRotation::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (objects.contains(id))
             {
+                emit ToolTip("Select origin point that is not part of the list of objects");
                 return;
             }