[FEATURE][layouts] Add 'resize to square' action

Resizes all selected items so that they are square

python/core/layout/qgslayoutaligner.sip

@@ -50,6 +50,7 @@ class QgsLayoutAligner
       ResizeWidest,
       ResizeShortest,
       ResizeTallest,
+      ResizeToSquare,
     };
 
     static void alignItems( QgsLayout *layout, const QList< QgsLayoutItem * > &items, Alignment alignment );

src/app/layout/qgslayoutdesignerdialog.cpp

@@ -213,6 +213,7 @@ QgsLayoutDesignerDialog::QgsLayoutDesignerDialog( QWidget *parent, Qt::WindowFla
   resizeToolButton->addAction( mActionResizeWidest );
   resizeToolButton->addAction( mActionResizeShortest );
   resizeToolButton->addAction( mActionResizeTallest );
+  resizeToolButton->addAction( mActionResizeToSquare );
   resizeToolButton->setDefaultAction( mActionResizeNarrowest );
   mActionsToolbar->addWidget( resizeToolButton );
 
@@ -318,6 +319,10 @@ QgsLayoutDesignerDialog::QgsLayoutDesignerDialog( QWidget *parent, Qt::WindowFla
   {
     mView->resizeSelectedItems( QgsLayoutAligner::ResizeTallest );
   } );
+  connect( mActionResizeToSquare, &QAction::triggered, this, [ = ]
+  {
+    mView->resizeSelectedItems( QgsLayoutAligner::ResizeToSquare );
+  } );
 
   connect( mActionAddPages, &QAction::triggered, this, &QgsLayoutDesignerDialog::addPages );
 

src/core/layout/qgslayoutaligner.cpp

@@ -178,7 +178,7 @@ void QgsLayoutAligner::distributeItems( QgsLayout *layout, const QList<QgsLayout
 
 void QgsLayoutAligner::resizeItems( QgsLayout *layout, const QList<QgsLayoutItem *> &items, QgsLayoutAligner::Resize resize )
 {
-  if ( items.size() < 2 )
+  if ( !( items.size() >= 2 || ( items.size() == 1 && resize == ResizeToSquare ) ) )
     return;
 
   auto collectSize = [resize]( QgsLayoutItem * item )->double
@@ -188,6 +188,7 @@ void QgsLayoutAligner::resizeItems( QgsLayout *layout, const QList<QgsLayoutItem
     {
       case ResizeNarrowest:
       case ResizeWidest:
+      case ResizeToSquare:
         return itemBBox.width();
       case ResizeShortest:
       case ResizeTallest:
@@ -211,6 +212,8 @@ void QgsLayoutAligner::resizeItems( QgsLayout *layout, const QList<QgsLayoutItem
       case ResizeWidest:
         newSize = std::max( size, newSize );
         break;
+      case ResizeToSquare:
+        break;
     }
   }
 
@@ -227,6 +230,14 @@ void QgsLayoutAligner::resizeItems( QgsLayout *layout, const QList<QgsLayoutItem
       case ResizeShortest:
         newSize.setHeight( size );
         break;
+      case ResizeToSquare:
+      {
+        if ( newSize.width() > newSize.height() )
+          newSize.setHeight( newSize.width() );
+        else
+          newSize.setWidth( newSize.height() );
+        break;
+      }
     }
 
     // need to keep item units
@@ -315,6 +326,8 @@ QString QgsLayoutAligner::undoText( QgsLayoutAligner::Resize resize )
       return QObject::tr( "Resized items to shortest" );
     case ResizeTallest:
       return QObject::tr( "Resized items to tallest" );
+    case ResizeToSquare:
+      return QObject::tr( "Resized items to square" );
   }
   return QString(); //no warnings
 }

src/core/layout/qgslayoutaligner.h

@@ -67,6 +67,7 @@ class CORE_EXPORT QgsLayoutAligner
       ResizeWidest, //!< Resize width to match widest width
       ResizeShortest, //!< Resize height to match shortest height
       ResizeTallest, //!< Resize height to match tallest height
+      ResizeToSquare, //!< Resize items to square
     };
 
     /**

src/ui/layout/qgslayoutdesignerbase.ui

@@ -191,6 +191,8 @@
      <addaction name="separator"/>
      <addaction name="mActionResizeShortest"/>
      <addaction name="mActionResizeTallest"/>
+     <addaction name="separator"/>
+     <addaction name="mActionResizeToSquare"/>
     </widget>
     <addaction name="mActionRaiseItems"/>
     <addaction name="mActionLowerItems"/>
@@ -911,6 +913,18 @@
     <string>Del</string>
    </property>
   </action>
+  <action name="mActionResizeToSquare">
+   <property name="icon">
+    <iconset resource="../../../images/images.qrc">
+     <normaloff>:/images/themes/default/mActionResizeTallest.svg</normaloff>:/images/themes/default/mActionResizeTallest.svg</iconset>
+   </property>
+   <property name="text">
+    <string>To S&amp;quare</string>
+   </property>
+   <property name="toolTip">
+    <string>Resizes items to squares</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="../../../images/images.qrc"/>

tests/src/python/test_qgslayoutaligner.py

@@ -228,6 +228,17 @@ class TestQgsLayoutAligner(unittest.TestCase):
         self.assertEqual(item1.sizeWithUnits(), QgsLayoutSize(18, 16, QgsUnitTypes.LayoutMillimeters))
         self.assertEqual(item2.sizeWithUnits(), QgsLayoutSize(10, 16, QgsUnitTypes.LayoutMillimeters))
         self.assertEqual(item3.sizeWithUnits(), QgsLayoutSize(1.8, 1.6, QgsUnitTypes.LayoutCentimeters))
+        l.undoStack().stack().undo()
+
+        item2.attemptResize(QgsLayoutSize(10, 19, QgsUnitTypes.LayoutMillimeters))
+        QgsLayoutAligner.resizeItems(l, [item1, item2, item3], QgsLayoutAligner.ResizeToSquare)
+        self.assertEqual(item1.sizeWithUnits(), QgsLayoutSize(18, 18, QgsUnitTypes.LayoutMillimeters))
+        self.assertEqual(item2.sizeWithUnits(), QgsLayoutSize(19, 19, QgsUnitTypes.LayoutMillimeters))
+        self.assertEqual(item3.sizeWithUnits(), QgsLayoutSize(1.8, 1.8, QgsUnitTypes.LayoutCentimeters))
+
+        l.undoStack().stack().undo()
+        QgsLayoutAligner.resizeItems(l, [item1], QgsLayoutAligner.ResizeToSquare)
+        self.assertEqual(item1.sizeWithUnits(), QgsLayoutSize(18, 18, QgsUnitTypes.LayoutMillimeters))
 
 
 if __name__ == '__main__':

tests/src/python/test_qgslayoutview.py

@@ -626,6 +626,13 @@ class TestQgsLayoutView(unittest.TestCase):
         self.assertEqual(item1.sizeWithUnits(), QgsLayoutSize(18, 16, QgsUnitTypes.LayoutMillimeters))
         self.assertEqual(item2.sizeWithUnits(), QgsLayoutSize(10, 16, QgsUnitTypes.LayoutMillimeters))
         self.assertEqual(item3.sizeWithUnits(), QgsLayoutSize(1.8, 1.6, QgsUnitTypes.LayoutCentimeters))
+        l.undoStack().stack().undo()
+
+        item2.attemptResize(QgsLayoutSize(10, 19, QgsUnitTypes.LayoutMillimeters))
+        view.resizeSelectedItems(QgsLayoutAligner.ResizeToSquare)
+        self.assertEqual(item1.sizeWithUnits(), QgsLayoutSize(18, 18, QgsUnitTypes.LayoutMillimeters))
+        self.assertEqual(item2.sizeWithUnits(), QgsLayoutSize(19, 19, QgsUnitTypes.LayoutMillimeters))
+        self.assertEqual(item3.sizeWithUnits(), QgsLayoutSize(1.8, 1.8, QgsUnitTypes.LayoutCentimeters))
 
 
 if __name__ == '__main__':