Drag and drop mesh into scene

src/gui/plugins/scene3d/GzScene3D.qml

@@ -15,7 +15,8 @@
  *
 */
 import QtQuick 2.9
-import QtQuick.Controls 2.0
+import QtQuick.Controls 2.2
+import QtQuick.Dialogs 1.0
 import RenderWindow 1.0
 import QtGraphicalEffects 1.0
 import IgnGazebo 1.0 as IgnGazebo
@@ -98,4 +99,25 @@ Rectangle {
       GzScene3D.OnDropped(drop.text, drag.x, drag.y)
     }
   }
+
+  // pop error
+  Connections {
+    target: GzScene3D
+    onPopupError: errorPopup.open()
+  }
+
+  Dialog {
+    id: errorPopup
+    parent: ApplicationWindow.overlay
+    modal: true
+    focus: true
+    x: (parent.width - width) / 2
+    y: (parent.height - height) / 2
+    title: "Error"
+    Text {
+      text: GzScene3D.errorPopupText
+    }
+    standardButtons: Dialog.Ok
+  }
+
 }

src/gui/plugins/scene3d/Scene3D.cc

@@ -38,6 +38,7 @@
 #include <ignition/common/KeyFrame.hh>
 #include <ignition/common/MeshManager.hh>
 #include <ignition/common/Profiler.hh>
+#include <ignition/common/StringUtils.hh>
 #include <ignition/common/Uuid.hh>
 #include <ignition/common/VideoEncoder.hh>
 
@@ -373,6 +374,9 @@ inline namespace IGNITION_GAZEBO_VERSION_NAMESPACE {
 
     /// \brief View collisions service
     public: std::string viewCollisionsService;
+
+    /// \brief Text for popup error message
+    public: QString errorPopupText;
   };
 }
 }
@@ -2793,7 +2797,7 @@ void Scene3D::OnDropped(const QString &_drop, int _mouseX, int _mouseY)
 {
   if (_drop.toStdString().empty())
   {
-    ignwarn << "Dropped empty entity URI." << std::endl;
+    this->SetErrorPopupText("Dropped empty entity URI.");
     return;
   }
 
@@ -2808,7 +2812,56 @@ void Scene3D::OnDropped(const QString &_drop, int _mouseX, int _mouseY)
   math::Vector3d pos = renderWindow->ScreenToScene({_mouseX, _mouseY});
 
   msgs::EntityFactory req;
-  req.set_sdf_filename(_drop.toStdString());
+  std::string dropStr = _drop.toStdString();
+  if (QUrl(_drop).isLocalFile())
+  {
+    // mesh to sdf model
+    common::rtrim(dropStr);
+
+    if (!common::MeshManager::Instance()->IsValidFilename(dropStr))
+    {
+      QString errTxt = QString::fromStdString("Invalid URI: " + dropStr +
+        "\nOnly Fuel URLs or mesh file types DAE, OBJ, and STL are supported.");
+      this->SetErrorPopupText(errTxt);
+      return;
+    }
+
+    // Fixes whitespace
+    dropStr = common::replaceAll(dropStr, "%20", " ");
+
+    std::string filename = common::basename(dropStr);
+    std::vector<std::string> splitName = common::split(filename, ".");
+
+    std::string sdf = "<?xml version='1.0'?>"
+      "<sdf version='" + std::string(SDF_PROTOCOL_VERSION) + "'>"
+        "<model name='" + splitName[0] + "'>"
+          "<link name='link'>"
+            "<visual name='visual'>"
+              "<geometry>"
+                "<mesh>"
+                  "<uri>" + dropStr + "</uri>"
+                "</mesh>"
+              "</geometry>"
+            "</visual>"
+            "<collision name='collision'>"
+              "<geometry>"
+                "<mesh>"
+                  "<uri>" + dropStr + "</uri>"
+                "</mesh>"
+              "</geometry>"
+            "</collision>"
+          "</link>"
+        "</model>"
+      "</sdf>";
+
+    req.set_sdf(sdf);
+  }
+  else
+  {
+    // model from fuel
+    req.set_sdf_filename(dropStr);
+  }
+
   req.set_allow_renaming(true);
   msgs::Set(req.mutable_pose(),
       math::Pose3d(pos.X(), pos.Y(), pos.Z(), 1, 0, 0, 0));
@@ -2817,6 +2870,20 @@ void Scene3D::OnDropped(const QString &_drop, int _mouseX, int _mouseY)
       req, cb);
 }
 
+/////////////////////////////////////////////////
+QString Scene3D::ErrorPopupText() const
+{
+  return this->dataPtr->errorPopupText;
+}
+
+/////////////////////////////////////////////////
+void Scene3D::SetErrorPopupText(const QString &_errorTxt)
+{
+  this->dataPtr->errorPopupText = _errorTxt;
+  this->ErrorPopupTextChanged();
+  this->popupError();
+}
+
 /////////////////////////////////////////////////
 void Scene3D::OnFocusWindow()
 {

src/gui/plugins/scene3d/Scene3D.hh

@@ -80,6 +80,14 @@ inline namespace IGNITION_GAZEBO_VERSION_NAMESPACE {
   {
     Q_OBJECT
 
+    /// \brief Text for popup error
+    Q_PROPERTY(
+      QString errorPopupText
+      READ ErrorPopupText
+      WRITE SetErrorPopupText
+      NOTIFY ErrorPopupTextChanged
+    )
+
     /// \brief Constructor
     public: Scene3D();
 
@@ -161,6 +169,22 @@ inline namespace IGNITION_GAZEBO_VERSION_NAMESPACE {
     private: bool OnViewCollisions(const msgs::StringMsg &_msg,
         msgs::Boolean &_res);
 
+    /// \brief Get the text for the popup error message
+    /// \return The error text
+    public: Q_INVOKABLE QString ErrorPopupText() const;
+
+    /// \brief Set the text for the popup error message
+    /// \param[in] _errorTxt The error text
+    public: Q_INVOKABLE void SetErrorPopupText(const QString &_errorTxt);
+
+    /// \brief Notify the popup error text has changed
+    signals: void ErrorPopupTextChanged();
+
+    /// \brief Notify that an error has occurred (opens popup)
+    /// Note that the function name needs to start with lowercase in order for
+    /// the connection to work on the QML side
+    signals: void popupError();
+
     /// \internal
     /// \brief Pointer to private data.
     private: std::unique_ptr<Scene3DPrivate> dataPtr;