added checkButton

CalculatorEndPage.qml

@@ -10,7 +10,7 @@ Page {
     TextField {
         id: sumInput
         placeholderText: "sum"
-        visible: !won.visible
+        visible: !endPageVisibility
         validator: IntValidator {bottom: -1000000; top: 1000000;}
         anchors {
             horizontalCenter: parent.horizontalCenter
@@ -19,6 +19,24 @@ Page {
         }
         Keys.onReturnPressed: calculator.checkSum(sumInput.text)
     }
+
+    RoundButton {
+        id: checkButton
+        height: parent.width * 0.2
+        width: height
+        text: "check"
+        font.pixelSize: parent.width * 0.03
+        visible: !endPageVisibility
+        anchors {
+            horizontalCenter: parent.horizontalCenter
+            top: parent.top
+            topMargin: parent.height * 0.3
+        }
+        onClicked: {
+            calculator.checkSum(sumInput.text)
+        }
+    }
+
     Label {
         id: won
         text: calculator.endPageLabelText
@@ -71,6 +89,7 @@ Page {
         height: parent.width * 0.2
         width: height
         text: "home"
+        font.pixelSize: parent.width * 0.03
         visible: endPageVisibility
         anchors {
             horizontalCenter: parent.horizontalCenter
@@ -83,4 +102,5 @@ Page {
             calculator.state = "starting"
         }
     }
+
 }