Fixed numeral mode having large empty space when bitset is hidden

kcalc.cpp

@@ -2180,7 +2180,6 @@ void KCalculator::showScienceButtons(bool toggled)
 void KCalculator::showLogicButtons(bool toggled)
 {
     if (toggled) {
-        firstVerticalLayout->setStretch(1, 1);
         mBitset->setEnabled(true);
         connect(mBitset, &KCalcBitset::valueChanged, this, &KCalculator::slotBitsetChanged);
         connect(calc_display, &KCalcDisplay::changedAmount, this, &KCalculator::slotUpdateBitset);
@@ -2206,7 +2205,6 @@ void KCalculator::showLogicButtons(bool toggled)
             (num_button_group_->button(i))->show();
         }
     } else {
-        firstVerticalLayout->setStretch(1, 0);
         mBitset->setEnabled(false);
         disconnect(mBitset, &KCalcBitset::valueChanged, this, &KCalculator::slotBitsetChanged);
         disconnect(calc_display, &KCalcDisplay::changedAmount, this, &KCalculator::slotUpdateBitset);
@@ -2295,6 +2293,7 @@ void KCalculator::slotBitsetshow(bool toggled)
     bool wasMinimumSize = isMinimumSize();
 
     mBitset->setVisible(toggled);
+    setBitsetLayoutActive(toggled);
     if (KCalcSettings::calculatorMode() == KCalcSettings::EnumCalculatorMode::numeral) {
         KCalcSettings::setShowBitset(toggled);
     }
@@ -2631,6 +2630,15 @@ void KCalculator::setLeftPadLayoutActive(bool active)
     leftPad->setSizePolicy(policy);
 }
 
+//------------------------------------------------------------------------------
+// Name: setBitsetLayoutActive
+// Desc: Enable/disable whether mBitset affects the layout
+//------------------------------------------------------------------------------
+void KCalculator::setBitsetLayoutActive(bool active)
+{
+    firstVerticalLayout->setStretch(1, (int)active); // 0 or 1
+}
+
 //------------------------------------------------------------------------------
 // Name: event
 // Desc: catch application's palette and font change events

kcalc.h

@@ -134,6 +134,7 @@ private:
     bool isMinimumSize();
     void forceResizeEvent();
     void setLeftPadLayoutActive(bool active);
+    void setBitsetLayoutActive(bool active);
 
     void updateDisplay(UpdateFlags flags);
     void updateHistoryWithFunction(CalcEngine::Operation);