QmlDesigner: Fix issues with dynamic vectors

The conversion from Qt.vectorxd was not strict enough
and expressions like Qt.vector2d(7 / Constants.width, 7 / Constants.height)
were read as [7, 7]. Reflection was not handled properly and the [7,7]
was written on selection.

Fixes:

* Avoid reflection
* Improve Qt.vector parsing; Move code to C++
* Handle "real" expression case and show binding indicator
* Fix setting an expression. We allow the binding editor/expression
  indicator only on the first component of the vector

Task-number: QDS-12242
Change-Id: I6707bdac860852d96d416adbe911d43fe9128e8a
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Qt CI Patch Build Bot <ci_patchbuild_bot@qt.io>

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/DynamicPropertiesSection.qml

@@ -291,53 +291,64 @@ Section {
             property int vecSize: 0
             property var proxyValues: []
             property var spinBoxes: [boxX, boxY, boxZ, boxW]
+            property bool block: false
 
             signal remove
 
-            onVecSizeChanged: updateProxyValues()
+            onVecSizeChanged: layoutVector.updateProxyValues()
 
-            spacing: StudioTheme.Values.sectionRowSpacing / 2
+            spacing: StudioTheme.Values.sectionRowSpacing
 
             function isValidValue(v) {
                 return !(v === undefined || isNaN(v))
             }
 
-            function updateExpression() {
+            function updateExpressionFromExpression() {
+                if (layoutVector.block)
+                    return
+
+                layoutVector.backendValue.expression = layoutVector.proxyValues[0].expression
+                // Only the first proxy value has an expression editor enabled
+            }
+
+            function updateExpressionFromValue() {
+                if (layoutVector.block)
+                    return
+
                 for (let i = 0; i < vecSize; ++i) {
-                    if (!isValidValue(proxyValues[i].value))
+                    if (!layoutVector.isValidValue(layoutVector.proxyValues[i].value))
                         return
                 }
 
-                let expStr = "Qt.vector" + vecSize + "d("+proxyValues[0].value
-                for (let j=1; j < vecSize; ++j)
-                    expStr += ", " + proxyValues[j].value
+                let expStr = "Qt.vector" + layoutVector.vecSize + "d(" + layoutVector.proxyValues[0].value
+                for (let j=1; j < layoutVector.vecSize; ++j)
+                    expStr += ", " + layoutVector.proxyValues[j].value
                 expStr += ")"
 
                 layoutVector.backendValue.expression = expStr
             }
 
             function updateProxyValues() {
-                if (!backendValue)
+                if (!layoutVector.backendValue)
                     return;
 
-                const startIndex = backendValue.expression.indexOf('(')
-                const endIndex = backendValue.expression.indexOf(')')
-                if (startIndex === -1 || endIndex === -1 || endIndex < startIndex)
-                    return
-                const numberStr = backendValue.expression.slice(startIndex + 1, endIndex)
-                const numbers = numberStr.split(",")
-                if (!Array.isArray(numbers) || numbers.length !== vecSize)
-                    return
+                let vals = layoutVector.backendValue.getExpressionAsVector()
 
-                let vals = []
-                for (let i = 0; i < vecSize; ++i) {
-                    vals[i] = parseFloat(numbers[i])
-                    if (!isValidValue(vals[i]))
-                        return
+                layoutVector.block = true
+
+                if (layoutVector.vecSize === vals.length) {
+                    for (let j = 0; j < layoutVector.vecSize; ++j) {
+                        layoutVector.proxyValues[j].setForceBound(false)
+                        layoutVector.proxyValues[j].value = vals[j]
+                    }
+                } else {
+                    for (let j = 0; j < layoutVector.vecSize; ++j) {
+                        layoutVector.proxyValues[j].setForceBound(true) // Required since the backendValue is just proxied
+                        layoutVector.proxyValues[j].expression = layoutVector.backendValue.expression
+                    }
                 }
 
-                for (let j = 0; j < vecSize; ++j)
-                    proxyValues[j].value = vals[j]
+                layoutVector.block = false
             }
 
             SecondColumnLayout {
@@ -357,15 +368,18 @@ Section {
                     tooltip: "X"
                 }
 
-                Spacer { implicitWidth: StudioTheme.Values.controlGap }
+                Spacer {
+                    implicitWidth: StudioTheme.Values.controlGap
+                                   + StudioTheme.Values.actionIndicatorWidth
+                }
 
                 SpinBox {
                     id: boxY
+                    actionIndicatorVisible: false
                     minimumValue: -9999999
                     maximumValue: 9999999
                     decimals: 2
                     implicitWidth: StudioTheme.Values.twoControlColumnWidth
-                                   + StudioTheme.Values.actionIndicatorWidth
                 }
 
                 Spacer { implicitWidth: StudioTheme.Values.controlLabelGap }
@@ -386,14 +400,16 @@ Section {
             }
 
             SecondColumnLayout {
-                visible: vecSize > 2
+                visible: layoutVector.vecSize > 2
+                Spacer { implicitWidth: StudioTheme.Values.actionIndicatorWidth }
+
                 SpinBox {
                     id: boxZ
+                    actionIndicatorVisible: false
                     minimumValue: -9999999
                     maximumValue: 9999999
                     decimals: 2
                     implicitWidth: StudioTheme.Values.twoControlColumnWidth
-                                   + StudioTheme.Values.actionIndicatorWidth
                 }
 
                 Spacer { implicitWidth: StudioTheme.Values.controlLabelGap }
@@ -401,19 +417,22 @@ Section {
                 ControlLabel {
                     text: "Z"
                     tooltip: "Z"
-                    visible: vecSize > 2
+                    visible: layoutVector.vecSize > 2
                 }
 
-                Spacer { implicitWidth: StudioTheme.Values.controlGap }
+                Spacer {
+                    implicitWidth: StudioTheme.Values.controlGap
+                                   + StudioTheme.Values.actionIndicatorWidth
+                }
 
                 SpinBox {
                     id: boxW
+                    actionIndicatorVisible: false
                     minimumValue: -9999999
                     maximumValue: 9999999
                     decimals: 2
                     implicitWidth: StudioTheme.Values.twoControlColumnWidth
-                                   + StudioTheme.Values.actionIndicatorWidth
-                    visible: vecSize > 3
+                    visible: layoutVector.vecSize > 3
                 }
 
                 Spacer { implicitWidth: StudioTheme.Values.controlLabelGap }
@@ -421,7 +440,7 @@ Section {
                 ControlLabel {
                     text: "W"
                     tooltip: "W"
-                    visible: vecSize > 3
+                    visible: layoutVector.vecSize > 3
                 }
 
                 Spacer { implicitWidth: StudioTheme.Values.controlGap }
@@ -430,7 +449,7 @@ Section {
                     height: 10
                     implicitWidth: StudioTheme.Values.twoControlColumnWidth
                                   + StudioTheme.Values.actionIndicatorWidth
-                    visible: vecSize === 2 // Placeholder for last spinbox
+                    visible: layoutVector.vecSize === 2 // Placeholder for last spinbox
                 }
 
                 Spacer { implicitWidth: StudioTheme.Values.twoControlColumnGap }
@@ -486,9 +505,12 @@ Section {
                     model: root.propertiesModel
                     row: index
                 }
+
                 PropertyLabel {
                     text: propertyName
                     tooltip: propertyType
+                    Layout.alignment: Qt.AlignTop
+                    Layout.topMargin: 6
                 }
 
                 Loader {
@@ -540,7 +562,8 @@ Section {
                             for (let i = 0; i < vecSize; ++i) {
                                 var newProxyValue = propertyRow.createProxyBackendValue()
                                 loader.item.proxyValues.push(newProxyValue)
-                                newProxyValue.valueChangedQml.connect(loader.item.updateExpression)
+                                newProxyValue.valueChangedQml.connect(loader.item.updateExpressionFromValue)
+                                newProxyValue.expressionChangedQml.connect(loader.item.updateExpressionFromExpression)
                                 loader.item.spinBoxes[i].backendValue = newProxyValue
                             }
                             propertyRow.backendValue.expressionChanged.connect(loader.item.updateProxyValues)

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/SpinBox.qml

@@ -22,6 +22,9 @@ Item {
     property alias realDragRange: spinBox.realDragRange
     property alias pixelsPerUnit: spinBox.pixelsPerUnit
 
+    property alias actionIndicatorEnabled: spinBox.actionIndicator.enabled
+    property alias actionIndicatorVisible: spinBox.actionIndicatorVisible
+
     width: 96
     implicitHeight: spinBox.height
 

src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.cpp

@@ -153,7 +153,8 @@ void PropertyEditorValue::setExpressionWithEmit(const QString &expression)
     if (m_expression != expression) {
         setExpression(expression);
         m_value.clear();
-        emit expressionChanged(nameAsQString()); // Note that we set the name in this case
+        emit expressionChanged(nameAsQString());
+        emit expressionChangedQml();// Note that we set the name in this case
     }
 }
 
@@ -180,7 +181,7 @@ bool PropertyEditorValue::isInSubState() const
 bool PropertyEditorValue::isBound() const
 {
     const QmlObjectNode objectNode(modelNode());
-    return objectNode.isValid() && objectNode.hasBindingProperty(name());
+    return m_forceBound || (objectNode.isValid() && objectNode.hasBindingProperty(name()));
 }
 
 bool PropertyEditorValue::isInModel() const
@@ -334,6 +335,7 @@ void PropertyEditorValue::resetValue()
         m_expression = QString();
         emit valueChanged(nameAsQString(), QVariant());
         emit expressionChanged({});
+        emit expressionChangedQml();
     }
 }
 
@@ -425,6 +427,34 @@ QStringList PropertyEditorValue::getExpressionAsList() const
     return generateStringList(expression());
 }
 
+QVector<double> PropertyEditorValue::getExpressionAsVector() const
+{
+    const QRegularExpression rx(
+        QRegularExpression::anchoredPattern("Qt.vector(2|3|4)d\\((.*?)\\)"));
+    const QRegularExpressionMatch match = rx.match(expression());
+    if (!match.hasMatch())
+        return {};
+
+    const QStringList floats = match.captured(2).split(',', Qt::SkipEmptyParts);
+
+    bool ok;
+
+    const int num = match.captured(1).toInt();
+
+    if (num != floats.count())
+        return {};
+
+    QVector<double> ret;
+    for (const QString &number : floats) {
+        ret.append(number.toDouble(&ok));
+
+        if (!ok)
+            return {};
+    }
+
+    return ret;
+}
+
 bool PropertyEditorValue::idListAdd(const QString &value)
 {
     const QmlObjectNode objectNode(modelNode());
@@ -507,6 +537,15 @@ void PropertyEditorValue::openMaterialEditor(int idx)
     m_modelNode.view()->emitCustomNotification("select_material", {}, {idx});
 }
 
+void PropertyEditorValue::setForceBound(bool b)
+{
+    if (m_forceBound == b)
+        return;
+    m_forceBound = b;
+
+    emit isBoundChanged();
+}
+
 QStringList PropertyEditorValue::generateStringList(const QString &string) const
 {
     QString copy = string;

src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h

@@ -126,12 +126,15 @@ public:
     bool isIdList() const;
 
     Q_INVOKABLE QStringList getExpressionAsList() const;
+    Q_INVOKABLE QVector<double> getExpressionAsVector() const;
     Q_INVOKABLE bool idListAdd(const QString &value);
     Q_INVOKABLE bool idListRemove(int idx);
     Q_INVOKABLE bool idListReplace(int idx, const QString &value);
     Q_INVOKABLE void commitDrop(const QString &dropData);
     Q_INVOKABLE void openMaterialEditor(int idx);
 
+    Q_INVOKABLE void setForceBound(bool b);
+
 public slots:
     void resetValue();
     void setEnumeration(const QString &scope, const QString &name);
@@ -143,6 +146,8 @@ signals:
     void expressionChanged(const QString &name); // HACK - We use the same notifer for the backend and frontend.
                                                  // If name is empty the signal is used for QML.
 
+    void expressionChangedQml();
+
     void exportPropertyAsAliasRequested(const QString &name);
     void removeAliasExportRequested(const QString &name);
 
@@ -168,6 +173,7 @@ private:
     bool m_hasActiveDrag = false;
     bool m_isValid = false; // if the property value belongs to a non-existing complexProperty it is invalid
     PropertyEditorNodeWrapper *m_complexNode;
+    bool m_forceBound = false;
 };
 
 } // namespace QmlDesigner