Add the widget embeddable option and implement it in the resizable_images example.

Author: zmoth

examples/resizable_images/ImageShowModel.cpp

@@ -24,6 +24,11 @@ ImageShowModel::ImageShowModel()
     _label->installEventFilter(this);
 }
 
+ImageShowModel::~ImageShowModel()
+{
+    delete _label;
+}
+
 unsigned int ImageShowModel::nPorts(PortType portType) const
 {
     unsigned int result = 1;

examples/resizable_images/ImageShowModel.hpp

@@ -23,7 +23,7 @@ class ImageShowModel : public NodeDelegateModel
 public:
     ImageShowModel();
 
-    ~ImageShowModel() = default;
+    virtual ~ImageShowModel();
 
 public:
     QString caption() const override { return QString("Image Display"); }
@@ -41,6 +41,8 @@ class ImageShowModel : public NodeDelegateModel
 
     void setInData(std::shared_ptr<NodeData> nodeData, PortIndex const port) override;
 
+    bool widgetEmbeddable() const override { return false; }
+
     QWidget *embeddedWidget() override { return _label; }
 
     bool resizable() const override { return true; }

examples/resizable_images/main.cpp

@@ -38,6 +38,26 @@ int main(int argc, char *argv[])
 
     GraphicsView view(&scene);
 
+    QObject::connect(&scene,
+                     &DataFlowGraphicsScene::nodeDoubleClicked,
+                     &dataFlowGraphModel,
+                     [&dataFlowGraphModel](QtNodes::NodeId nodeId) {
+                         QString name = dataFlowGraphModel
+                                            .nodeData(nodeId, QtNodes::NodeRole::Caption)
+                                            .value<QString>();
+
+                         bool isEmbeded = dataFlowGraphModel
+                                              .nodeData(nodeId, QtNodes::NodeRole::WidgetEmbeddable)
+                                              .value<bool>();
+                         auto w = dataFlowGraphModel.nodeData(nodeId, QtNodes::NodeRole::Widget)
+                                      .value<QWidget *>();
+
+                         if (!isEmbeded && w) {
+                             w->setWindowTitle(name + "_" + QString::number(nodeId));
+                             w->show();
+                         }
+                     });
+
     view.setWindowTitle("Data Flow: Resizable Images");
     view.resize(800, 600);
     // Center window.

include/QtNodes/internal/Definitions.hpp

@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 #include "Export.hpp"
 
@@ -22,16 +22,17 @@ Q_NAMESPACE_EXPORT(NODE_EDITOR_PUBLIC)
  * Constants used for fetching QVariant data from GraphModel.
  */
     enum class NodeRole {
-        Type = 0,           ///< Type of the current node, usually a string.
-        Position = 1,       ///< `QPointF` positon of the node on the scene.
-        Size = 2,           ///< `QSize` for resizable nodes.
-        CaptionVisible = 3, ///< `bool` for caption visibility.
-        Caption = 4,        ///< `QString` for node caption.
-        Style = 5,          ///< Custom NodeStyle as QJsonDocument
-        InternalData = 6,   ///< Node-stecific user data as QJsonObject
-        InPortCount = 7,    ///< `unsigned int`
-        OutPortCount = 9,   ///< `unsigned int`
-        Widget = 10,        ///< Optional `QWidget*` or `nullptr`
+        Type = 0,         ///< Type of the current node, usually a string.
+        Position,         ///< `QPointF` positon of the node on the scene.
+        Size,             ///< `QSize` for resizable nodes.
+        CaptionVisible,   ///< `bool` for caption visibility.
+        Caption,          ///< `QString` for node caption.
+        Style,            ///< Custom NodeStyle as QJsonDocument
+        InternalData,     ///< Node-stecific user data as QJsonObject
+        InPortCount,      ///< `unsigned int`
+        OutPortCount,     ///< `unsigned int`
+        WidgetEmbeddable, ///< `bool` for widget embeddability
+        Widget,           ///< Optional `QWidget*` or `nullptr`
     };
 Q_ENUM_NS(NodeRole)
 

include/QtNodes/internal/NodeDelegateModel.hpp

@@ -20,7 +20,9 @@ class StyleCollection;
  * AbstractGraphModel.
  * This class is the same what has been called NodeDataModel before v3.
  */
-class NODE_EDITOR_PUBLIC NodeDelegateModel : public QObject, public Serializable
+class NODE_EDITOR_PUBLIC NodeDelegateModel
+    : public QObject
+    , public Serializable
 {
     Q_OBJECT
 
@@ -78,6 +80,8 @@ class NODE_EDITOR_PUBLIC NodeDelegateModel : public QObject, public Serializable
    */
     virtual QWidget *embeddedWidget() = 0;
 
+    virtual bool widgetEmbeddable() const { return true; }
+
     virtual bool resizable() const { return false; }
 
 public Q_SLOTS:

src/DataFlowGraphModel.cpp

@@ -203,7 +203,7 @@ QVariant DataFlowGraphModel::nodeData(NodeId nodeId, NodeRole role) const
         break;
 
     case NodeRole::CaptionVisible:
-        result = model->captionVisible();
+        result = model->widgetEmbeddable() ? model->captionVisible() : true;
         break;
 
     case NodeRole::Caption:
@@ -232,6 +232,10 @@ QVariant DataFlowGraphModel::nodeData(NodeId nodeId, NodeRole role) const
         result = model->nPorts(PortType::Out);
         break;
 
+    case NodeRole::WidgetEmbeddable:
+        result = model->widgetEmbeddable();
+        break;
+
     case NodeRole::Widget: {
         auto w = model->embeddedWidget();
         result = QVariant::fromValue(w);
@@ -245,7 +249,7 @@ NodeFlags DataFlowGraphModel::nodeFlags(NodeId nodeId) const
 {
     auto it = _models.find(nodeId);
 
-    if (it != _models.end() && it->second->resizable())
+    if (it != _models.end() && it->second->widgetEmbeddable() && it->second->resizable())
         return NodeFlag::Resizable;
 
     return NodeFlag::NoFlags;

src/DefaultHorizontalNodeGeometry.cpp

@@ -32,7 +32,10 @@ void DefaultHorizontalNodeGeometry::recomputeSize(NodeId const nodeId) const
 {
     unsigned int height = maxVerticalPortsExtent(nodeId);
 
-    if (auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget)) {
+    bool isEmbeded = _graphModel.nodeData(nodeId, NodeRole::WidgetEmbeddable).value<bool>();
+    auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget);
+
+    if (isEmbeded && w) {
         height = std::max(height, static_cast<unsigned int>(w->height()));
     }
 
@@ -48,7 +51,7 @@ void DefaultHorizontalNodeGeometry::recomputeSize(NodeId const nodeId) const
 
     unsigned int width = inPortWidth + outPortWidth + 4 * _portSpasing;
 
-    if (auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget)) {
+    if (isEmbeded && w) {
         width += w->width();
     }
 
@@ -150,7 +153,10 @@ QPointF DefaultHorizontalNodeGeometry::widgetPosition(NodeId const nodeId) const
 
     unsigned int captionHeight = captionRect(nodeId).height();
 
-    if (auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget)) {
+    bool isEmbeded = _graphModel.nodeData(nodeId, NodeRole::WidgetEmbeddable).value<bool>();
+    auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget);
+
+    if (isEmbeded && w) {
         // If the widget wants to use as much vertical space as possible,
         // place it immediately after the caption.
         if (w->sizePolicy().verticalPolicy() & QSizePolicy::ExpandFlag) {

src/DefaultVerticalNodeGeometry.cpp

@@ -32,7 +32,10 @@ void DefaultVerticalNodeGeometry::recomputeSize(NodeId const nodeId) const
 {
     unsigned int height = _portSpasing; // maxHorizontalPortsExtent(nodeId);
 
-    if (auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget)) {
+    bool isEmbeded = _graphModel.nodeData(nodeId, NodeRole::WidgetEmbeddable).value<bool>();
+    auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget);
+
+    if (isEmbeded && w) {
         height = std::max(height, static_cast<unsigned int>(w->height()));
     }
 
@@ -64,7 +67,7 @@ void DefaultVerticalNodeGeometry::recomputeSize(NodeId const nodeId) const
 
     unsigned int width = std::max(totalInPortsWidth, totalOutPortsWidth);
 
-    if (auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget)) {
+    if (isEmbeded && w) {
         width = std::max(width, static_cast<unsigned int>(w->width()));
     }
 
@@ -177,7 +180,10 @@ QPointF DefaultVerticalNodeGeometry::widgetPosition(NodeId const nodeId) const
 
     unsigned int captionHeight = captionRect(nodeId).height();
 
-    if (auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget)) {
+    bool isEmbeded = _graphModel.nodeData(nodeId, NodeRole::WidgetEmbeddable).value<bool>();
+    auto w = _graphModel.nodeData<QWidget *>(nodeId, NodeRole::Widget);
+
+    if (isEmbeded && w) {
         // If the widget wants to use as much vertical space as possible,
         // place it immediately after the caption.
         if (w->sizePolicy().verticalPolicy() & QSizePolicy::ExpandFlag) {

src/NodeGraphicsObject.cpp

@@ -81,6 +81,9 @@ void NodeGraphicsObject::embedQWidget()
     AbstractNodeGeometry &geometry = nodeScene()->nodeGeometry();
     geometry.recomputeSize(_nodeId);
 
+    if (!_graphModel.nodeData(_nodeId, NodeRole::WidgetEmbeddable).value<bool>())
+        return;
+
     if (auto w = _graphModel.nodeData(_nodeId, NodeRole::Widget).value<QWidget *>()) {
         _proxyWidget = new QGraphicsProxyWidget(this);
 
@@ -245,7 +248,8 @@ void NodeGraphicsObject::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
         setSelected(true);
     }
 
-    if (_nodeState.resizing()) {
+    if (_nodeState.resizing()
+        && _graphModel.nodeData(_nodeId, NodeRole::WidgetEmbeddable).value<bool>()) {
         auto diff = event->pos() - event->lastPos();
 
         if (auto w = _graphModel.nodeData<QWidget *>(_nodeId, NodeRole::Widget)) {