add book

2025-09-28 17:05:51 +08:00
parent 8eb80ab66d
commit d97fa3e0fe
398 changed files with 18737 additions and 0 deletions
--- a/Qt6QMLBeginnersCode/2.DissectingQmlSyntax/3-PropertyBinding/Main.qml
+++ b/Qt6QMLBeginnersCode/2.DissectingQmlSyntax/3-PropertyBinding/Main.qml
@@ -0,0 +1,54 @@
+// Copyright (c) Daniel Gakwaya.
+// SPDX-License-Identifier: MIT
+
+import QtQuick
+
+Window {
+    visible: true
+    width: 640
+    height: 480
+    title: qsTr("Property Binding Demo")
+
+    Rectangle {
+        id: redRectId
+        width: 50
+        height: width * 1.5
+        color: "red"
+    }
+
+    Rectangle {
+        id: blueRectId
+        color: "blue"
+        width: 100
+        height: 100
+        anchors.bottom: parent.bottom
+
+        MouseArea {
+            anchors.fill: parent
+            onClicked: {
+                redRectId.width = redRectId.width + 10
+            }
+        }
+    }
+
+    Rectangle {
+        id: greenRectId
+        color: "green"
+        width: 100
+        height: 100
+        anchors.bottom: parent.bottom
+        anchors.left: blueRectId.right
+
+        MouseArea {
+            anchors.fill: parent
+            onClicked: {
+                //redRectId.height = 100 // Doesn't work
+                //redRectId.height = redRectId.width * 1.5 // Doesn't work either
+
+                redRectId.height = Qt.binding(function() {
+                    return redRectId.width * 2
+                })
+            }
+        }
+    }
+}