add book

Qt6QMLBeginnersCode/4.SignalsSlots/10-MultipleSignalParameters/Main.qml

@@ -0,0 +1,56 @@
+// Copyright (c) Daniel Gakwaya.
+// SPDX-License-Identifier: MIT
+
+import QtQuick
+
+Window {
+    width: 640
+    height: 480
+    visible: true
+    title: qsTr("Multiple Signal Parameters")
+
+    signal info(string last_name,string first_name,int age)
+
+    //Handle all three parameters
+    onInfo: function(l,f,a){
+        print("last name: " + l + ", first name: " + f +", age: "+ a)
+    }
+
+    //Only handle the first two
+    /*
+    onInfo: function(l,f){
+        print("last name: " + l + ", first name: " + f)
+    }
+    */
+    //Only handle the first one
+    /*
+    onInfo: function(l){
+        print("last name: " +l)
+    }
+    */
+    //Can only omit trailling parameters. Can't only ignore last name
+    /*
+    onInfo: function(f,a){
+        print(" first name: " + f +", age: "+ a)
+    }
+    */
+    //Non trailling parameters can be ignored through some hack
+    /*
+    onInfo: function(_,f,a){
+        print(" first name: " + f +", age: "+ a)
+    }
+    */
+    Rectangle{
+        id: rectId
+        width: 300;
+        height: 300
+        color: "blue"
+
+        MouseArea{
+            anchors.fill: parent
+            onClicked: {
+                info("John", "Snow", 33)
+            }
+        }
+    }
+}