QmlDesigner: Highlight material editor properties upon asset drag

When starting an asset drag in the assets view, highlight all
supported properties in the material editor.

Change-Id: I60935756e4c1384edcc284068163d08ebe529a05
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Samuel Ghinet <samuel.ghinet@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

11 files changed, 101 insertions, 53 deletions

diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ComboBox.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ComboBox.qml
index 48ec9fa470..b9d9f32316 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ComboBox.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/ComboBox.qml
@@ -41,6 +41,8 @@ StudioControls.ComboBox {
 
     onModelChanged: colorLogic.invalidate()
 
+    hasActiveDrag: comboBox.backendValue !== undefined && comboBox.backendValue.hasActiveDrag
+
     // This is available in all editors.
 
     onValueTypeChanged: {
@@ -83,16 +85,15 @@ StudioControls.ComboBox {
 
         onEntered: (drag) => {
             dropArea.assetPath = drag.getDataAsString(drag.keys[0]).split(",")[0]
-
-            drag.accepted = comboBox.backendValue !== undefined && comboBox.backendValue.isSupportedDrop(dropArea.assetPath)
-            comboBox.hasActiveDrag = drag.accepted
+            drag.accepted = comboBox.backendValue !== undefined && comboBox.backendValue.hasActiveDrag
+            comboBox.hasActiveHoverDrag = drag.accepted
         }
 
-        onExited: comboBox.hasActiveDrag = false
+        onExited: comboBox.hasActiveHoverDrag = false
 
         onDropped: {
             comboBox.backendValue.commitDrop(dropArea.assetPath)
-            comboBox.hasActiveDrag = false
+            comboBox.hasActiveHoverDrag = false
         }
 
     }
diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBox.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBox.qml
index fbd4f53062..70cbdf000e 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBox.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBox.qml
@@ -39,7 +39,8 @@ T.ComboBox {
                          && myComboBox.enabled
     property bool edit: myComboBox.activeFocus && myComboBox.editable
     property bool open: comboBoxPopup.opened
-    property bool hasActiveDrag: false
+    property bool hasActiveDrag: false // an item that can be dropped on the combobox is being dragged
+    property bool hasActiveHoverDrag: false // an item that can be dropped on the combobox is being hovered on the combobox
 
     property bool dirty: false // user modification flag
 
@@ -49,6 +50,9 @@ T.ComboBox {
 
     property alias textInput: comboBoxInput
 
+    property int borderWidth: myComboBox.hasActiveHoverDrag ? StudioTheme.Values.borderHover
+                                                            : StudioTheme.Values.border
+
     signal compressedActivated(int index, int reason)
 
     enum ActivatedReason { EditingFinished, Other }
@@ -57,7 +61,7 @@ T.ComboBox {
     height: StudioTheme.Values.defaultControlHeight
 
     leftPadding: actionIndicator.width
-    rightPadding: popupIndicator.width + StudioTheme.Values.border
+    rightPadding: popupIndicator.width + myComboBox.borderWidth
     font.pixelSize: StudioTheme.Values.myFontSize
     wheelEnabled: false
 
@@ -87,6 +91,7 @@ T.ComboBox {
 
         myControl: myComboBox
         text: myComboBox.editText
+        borderWidth: myComboBox.borderWidth
 
         onEditingFinished: {
             comboBoxInput.deselect()
@@ -108,16 +113,16 @@ T.ComboBox {
         myControl: myComboBox
         myPopup: myComboBox.popup
         x: comboBoxInput.x + comboBoxInput.width
-        y: StudioTheme.Values.border
-        width: StudioTheme.Values.checkIndicatorWidth - StudioTheme.Values.border
-        height: StudioTheme.Values.checkIndicatorHeight - (StudioTheme.Values.border * 2)
+        y: myComboBox.borderWidth
+        width: StudioTheme.Values.checkIndicatorWidth - myComboBox.borderWidth
+        height: StudioTheme.Values.checkIndicatorHeight - myComboBox.borderWidth * 2
     }
 
     background: Rectangle {
         id: comboBoxBackground
         color: StudioTheme.Values.themeControlBackground
         border.color: StudioTheme.Values.themeControlOutline
-        border.width: StudioTheme.Values.border
+        border.width: myComboBox.borderWidth
         x: actionIndicator.width
         width: myComboBox.width - actionIndicator.width
         height: myComboBox.height
@@ -144,7 +149,7 @@ T.ComboBox {
         width: comboBoxPopup.width - comboBoxPopup.leftPadding - comboBoxPopup.rightPadding
                - (comboBoxPopupScrollBar.visible ? comboBoxPopupScrollBar.contentItem.implicitWidth
                                                    + 2 : 0) // TODO Magic number
-        height: StudioTheme.Values.height - 2 * StudioTheme.Values.border
+        height: StudioTheme.Values.height - 2 * myComboBox.borderWidth
         padding: 0
         enabled: model.enabled === undefined ? true : model.enabled
 
@@ -198,9 +203,9 @@ T.ComboBox {
 
     popup: T.Popup {
         id: comboBoxPopup
-        x: actionIndicator.width + StudioTheme.Values.border
+        x: actionIndicator.width + myComboBox.borderWidth
         y: myComboBox.height
-        width: myComboBox.width - actionIndicator.width - (StudioTheme.Values.border * 2)
+        width: myComboBox.width - actionIndicator.width - myComboBox.borderWidth * 2
         // TODO Setting the height on the popup solved the problem with the popup of height 0,
         // but it has the problem that it sometimes extend over the border of the actual window
         // and is then cut off.
@@ -208,7 +213,7 @@ T.ComboBox {
                          + comboBoxPopup.bottomPadding,
                          myComboBox.Window.height - topMargin - bottomMargin,
                          StudioTheme.Values.maxComboBoxPopupHeight)
-        padding: StudioTheme.Values.border
+        padding: myComboBox.borderWidth
         margins: 0 // If not defined margin will be -1
         closePolicy: T.Popup.CloseOnPressOutside | T.Popup.CloseOnPressOutsideParent
                      | T.Popup.CloseOnEscape | T.Popup.CloseOnReleaseOutside
@@ -252,8 +257,9 @@ T.ComboBox {
             PropertyChanges {
                 target: comboBoxBackground
                 color: StudioTheme.Values.themeControlBackground
-                border.color: hasActiveDrag ? StudioTheme.Values.themeInteraction
-                                            : StudioTheme.Values.themeControlOutline
+                border.color: myComboBox.hasActiveDrag ? StudioTheme.Values.themeInteraction
+                                                       : StudioTheme.Values.themeControlOutline
+                border.width: myComboBox.borderWidth
             }
         },
         // This state is intended for ComboBoxes which aren't editable, but have focus e.g. via
diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBoxInput.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBoxInput.qml
index de7dcc1f8c..c6b91dc1ad 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBoxInput.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/ComboBoxInput.qml
@@ -34,6 +34,7 @@ TextInput {
 
     property bool edit: textInput.activeFocus
     property bool hover: mouseArea.containsMouse && textInput.enabled
+    property int borderWidth: StudioTheme.Values.border
 
     z: 2
     font: myControl.font
@@ -55,11 +56,11 @@ TextInput {
 
     Rectangle {
         id: textInputBackground
-        x: StudioTheme.Values.border
-        y: StudioTheme.Values.border
+        x: textInput.borderWidth
+        y: textInput.borderWidth
         z: -1
         width: textInput.width
-        height: StudioTheme.Values.height - (StudioTheme.Values.border * 2)
+        height: StudioTheme.Values.height - textInput.borderWidth * 2
         color: StudioTheme.Values.themeControlBackground
         border.width: 0
     }
diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioTheme/Values.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioTheme/Values.qml
index 75d21a8e29..d9bf43db74 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioTheme/Values.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioTheme/Values.qml
@@ -86,6 +86,7 @@ QtObject {
 
     property real marginTopBottom: 4
     property real border: 1
+    property real borderHover: 3
 
     property real maxComboBoxPopupHeight: Math.round(300 * values.scaleFactor)
     property real maxTextAreaPopupHeight: Math.round(150 * values.scaleFactor)
diff --git a/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp b/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp
index 221f9ec0f4..7cf91158d6 100644
--- a/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp
+++ b/src/plugins/qmldesigner/components/assetslibrary/assetslibrarywidget.cpp
@@ -81,30 +81,20 @@ bool AssetsLibraryWidget::eventFilter(QObject *obj, QEvent *event)
         if (obj == m_assetsWidget.data())
             QMetaObject::invokeMethod(m_assetsWidget->rootObject(), "handleViewFocusOut");
     } else if (event->type() == QMouseEvent::MouseMove) {
-        if (!m_assetsToDrag.isEmpty()) {
+        if (!m_assetsToDrag.isEmpty() && !m_model.isNull()) {
             QMouseEvent *me = static_cast<QMouseEvent *>(event);
             if ((me->globalPos() - m_dragStartPoint).manhattanLength() > 10) {
-                auto drag = new QDrag(this);
-                drag->setPixmap(m_assetsIconProvider->requestPixmap(m_assetsToDrag[0], nullptr, {128, 128}));
                 QMimeData *mimeData = new QMimeData;
                 mimeData->setData(Constants::MIME_TYPE_ASSETS, m_assetsToDrag.join(',').toUtf8());
-                drag->setMimeData(mimeData);
-                drag->exec();
-                drag->deleteLater();
-
+                m_model->startDrag(mimeData,
+                                   m_assetsIconProvider->requestPixmap(m_assetsToDrag[0], nullptr, {128, 128}));
                 m_assetsToDrag.clear();
             }
         }
     } else if (event->type() == QMouseEvent::MouseButtonRelease) {
         m_assetsToDrag.clear();
-        QWidget *view = QmlDesignerPlugin::instance()->viewManager().widget("Navigator");
-        if (view) {
-            NavigatorWidget *navView = qobject_cast<NavigatorWidget *>(view);
-            if (navView) {
-                navView->setDragType("");
-                navView->update();
-            }
-        }
+        if (m_model)
+            m_model->endDrag();
     }
 
     return QObject::eventFilter(obj, event);
diff --git a/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp b/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp
index 1b4ce59fb5..d231ba1e51 100644
--- a/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp
+++ b/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp
@@ -29,6 +29,7 @@
 #include "materialeditorcontextobject.h"
 #include "propertyeditorvalue.h"
 #include "materialeditortransaction.h"
+#include "assetslibrarywidget.h"
 
 #include <qmldesignerconstants.h>
 #include <qmltimeline.h>
@@ -49,6 +50,7 @@
 #include <coreplugin/messagebox.h>
 #include <designmodewidget.h>
 #include <qmldesignerplugin.h>
+#include <utils/algorithm.h>
 #include <utils/fileutils.h>
 #include <utils/qtcassert.h>
 
@@ -798,6 +800,42 @@ void MaterialEditorView::customNotification(const AbstractView *view, const QStr
     }
 }
 
+void QmlDesigner::MaterialEditorView::highlightSupportedProperties(bool highlight)
+{
+    DesignerPropertyMap &propMap = m_qmlBackEnd->backendValuesPropertyMap();
+    const QStringList propNames = propMap.keys();
+
+    for (const QString &propName : propNames) {
+        if (propName.endsWith("Map")) {
+            QObject *propEditorValObj = propMap.value(propName).value<QObject *>();
+            PropertyEditorValue *propEditorVal = qobject_cast<PropertyEditorValue *>(propEditorValObj);
+            propEditorVal->setHasActiveDrag(highlight);
+        }
+    }
+}
+
+void MaterialEditorView::dragStarted(QMimeData *mimeData)
+{
+    if (!mimeData->hasFormat(Constants::MIME_TYPE_ASSETS))
+        return;
+
+    const QStringList assetPaths = QString::fromUtf8(mimeData->data(Constants::MIME_TYPE_ASSETS)).split(',');
+    bool isImage = Utils::anyOf(assetPaths, [] (const QString &assetPath) {
+        QString assetType = AssetsLibraryWidget::getAssetTypeAndData(assetPath).first;
+        return assetType == Constants::MIME_TYPE_ASSET_IMAGE;
+    });
+
+    if (!isImage) // only image assets are dnd supported
+        return;
+
+    highlightSupportedProperties();
+}
+
+void MaterialEditorView::dragEnded()
+{
+    highlightSupportedProperties(false);
+}
+
 // from model to material editor
 void MaterialEditorView::setValue(const QmlObjectNode &qmlObjectNode, const PropertyName &name, const QVariant &value)
 {
diff --git a/src/plugins/qmldesigner/components/materialeditor/materialeditorview.h b/src/plugins/qmldesigner/components/materialeditor/materialeditorview.h
index 8ab30a63f4..3e8632d26f 100644
--- a/src/plugins/qmldesigner/components/materialeditor/materialeditorview.h
+++ b/src/plugins/qmldesigner/components/materialeditor/materialeditorview.h
@@ -73,6 +73,9 @@ public:
     void customNotification(const AbstractView *view, const QString &identifier,
                             const QList<ModelNode> &nodeList, const QList<QVariant> &data) override;
 
+    void dragStarted(QMimeData *mimeData) override;
+    void dragEnded() override;
+
     void changeValue(const QString &name);
     void changeExpression(const QString &name);
     void exportPropertyAsAlias(const QString &name);
@@ -93,6 +96,7 @@ private:
     static QString materialEditorResourcesPath();
 
     void reloadQml();
+    void highlightSupportedProperties(bool highlight = true);
     QString generateIdFromName(const QString &name);
 
     void ensureMaterialLibraryNode();
diff --git a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.cpp b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.cpp
index 8b1eea6dc9..1ef95365e1 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.cpp
+++ b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.cpp
@@ -274,6 +274,19 @@ bool PropertyEditorValue::isTranslated() const
     return false;
 }
 
+bool PropertyEditorValue::hasActiveDrag() const
+{
+    return m_hasActiveDrag;
+}
+
+void PropertyEditorValue::setHasActiveDrag(bool val)
+{
+    if (m_hasActiveDrag != val) {
+        m_hasActiveDrag = val;
+        emit hasActiveDragChanged();
+    }
+}
+
 static bool isAllowedSubclassType(const QString &type, const QmlDesigner::NodeMetaInfo &metaInfo)
 {
     if (!metaInfo.isValid())
@@ -371,18 +384,6 @@ void PropertyEditorValue::setEnumeration(const QString &scope, const QString &na
     setValueWithEmit(QVariant::fromValue(newEnumeration));
 }
 
-bool PropertyEditorValue::isSupportedDrop(const QString &path)
-{
-    QString suffix = "*." + QFileInfo(path).suffix().toLower();
-
-    if (m_modelNode.isSubclassOf("QtQuick3D.Material") && nameAsQString().endsWith("Map"))
-        return QmlDesigner::AssetsLibraryModel::supportedImageSuffixes().contains(suffix);
-
-    // TODO: handle support for other object properties dnd here (like image source)
-
-    return false;
-}
-
 void PropertyEditorValue::exportPropertyAsAlias()
 {
     emit exportPropertyAsAliasRequested(nameAsQString());
diff --git a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h
index 2a2b09d5c8..4ae156dc92 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/propertyeditorvalue.h
@@ -82,6 +82,7 @@ class PropertyEditorValue : public QObject
     Q_PROPERTY(bool isBound READ isBound NOTIFY isBoundChanged FINAL)
     Q_PROPERTY(bool isValid READ isValid NOTIFY isValidChanged FINAL)
     Q_PROPERTY(bool isTranslated READ isTranslated NOTIFY expressionChanged FINAL)
+    Q_PROPERTY(bool hasActiveDrag READ hasActiveDrag WRITE setHasActiveDrag NOTIFY hasActiveDragChanged FINAL)
 
     Q_PROPERTY(bool isIdList READ isIdList NOTIFY expressionChanged FINAL)
     Q_PROPERTY(QStringList expressionAsList READ getExpressionAsList NOTIFY expressionChanged FINAL)
@@ -117,6 +118,9 @@ public:
 
     bool isTranslated() const;
 
+    bool hasActiveDrag() const;
+    void setHasActiveDrag(bool val);
+
     bool isAvailable() const;
 
     QmlDesigner::PropertyName name() const;
@@ -148,7 +152,6 @@ public:
 public slots:
     void resetValue();
     void setEnumeration(const QString &scope, const QString &name);
-    bool isSupportedDrop(const QString &path);
 
 signals:
     void valueChanged(const QString &name, const QVariant&);
@@ -164,6 +167,7 @@ signals:
     void isBoundChanged();
     void isValidChanged();
     void isExplicitChanged();
+    void hasActiveDragChanged();
 
 private:
     QStringList generateStringList(const QString &string) const;
@@ -176,6 +180,7 @@ private:
     bool m_isInSubState;
     bool m_isInModel;
     bool m_isBound;
+    bool m_hasActiveDrag = false;
     bool m_isValid; // if the property value belongs to a non-existing complexProperty it is invalid
     PropertyEditorNodeWrapper *m_complexNode;
 };
diff --git a/src/plugins/qmldesigner/designercore/include/model.h b/src/plugins/qmldesigner/designercore/include/model.h
index 9a2bc14fe6..6b8dfab431 100644
--- a/src/plugins/qmldesigner/designercore/include/model.h
+++ b/src/plugins/qmldesigner/designercore/include/model.h
@@ -35,6 +35,7 @@
 #include <import.h>
 
 QT_BEGIN_NAMESPACE
+class QPixmap;
 class QUrl;
 QT_END_NAMESPACE
 
@@ -44,7 +45,7 @@ namespace Internal {
 class ModelPrivate;
 class WriteLocker;
 class NodeMetaInfoPrivate;
-} //Internal
+} // namespace Internal
 
 class AnchorLine;
 class ModelNode;
@@ -130,7 +131,7 @@ public:
     QString generateNewId(const QString &prefixName) const;
     QString generateNewId(const QString &prefixName, const QString &fallbackPrefix) const;
 
-    void startDrag(QMimeData *mimeData, const QString iconPath = {});
+    void startDrag(QMimeData *mimeData, const QPixmap &icon);
     void endDrag();
 
 protected:
@@ -140,4 +141,4 @@ private:
     Internal::ModelPrivate *d;
 };
 
-}
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/designercore/model/model.cpp b/src/plugins/qmldesigner/designercore/model/model.cpp
index d879271c0d..4e38fb3cfb 100644
--- a/src/plugins/qmldesigner/designercore/model/model.cpp
+++ b/src/plugins/qmldesigner/designercore/model/model.cpp
@@ -1510,12 +1510,12 @@ QString Model::generateNewId(const QString &prefixName, const QString &fallbackP
     return newId;
 }
 
-void Model::startDrag(QMimeData *mimeData, const QString iconPath)
+void Model::startDrag(QMimeData *mimeData, const QPixmap &icon)
 {
     d->notifyDragStarted(mimeData);
 
     auto drag = new QDrag(this);
-    drag->setPixmap(iconPath);
+    drag->setPixmap(icon);
     drag->setMimeData(mimeData);
     drag->exec();
     drag->deleteLater();