[ui] Introduce ClipboardHelper for copying to clipboard from QML

* add ClipboardHelper class that contains a QClipboard and exposes its method as Slots
* use Clipboard instead of hidden TextEdit where meaningful

meshroom/ui/app.py

@@ -9,6 +9,7 @@ from PySide2.QtWidgets import QApplication
 import meshroom
 from meshroom.core import nodesDesc
 from meshroom.ui import components
+from meshroom.ui.components.clipboard import ClipboardHelper
 from meshroom.ui.components.filepath import FilepathHelper
 from meshroom.ui.components.scene3D import Scene3DHelper
 from meshroom.ui.palette import PaletteManager
@@ -95,6 +96,7 @@ class MeshroomApp(QApplication):
         # => expose them as context properties instead
         self.engine.rootContext().setContextProperty("Filepath", FilepathHelper(parent=self))
         self.engine.rootContext().setContextProperty("Scene3DHelper", Scene3DHelper(parent=self))
+        self.engine.rootContext().setContextProperty("Clipboard", ClipboardHelper(parent=self))
 
         # additional context properties
         self.engine.rootContext().setContextProperty("_PaletteManager", PaletteManager(self.engine, parent=self))

meshroom/ui/components/__init__.py

@@ -1,11 +1,13 @@
 
 def registerTypes():
     from PySide2.QtQml import qmlRegisterType
+    from meshroom.ui.components.clipboard import ClipboardHelper
     from meshroom.ui.components.edge import EdgeMouseArea
     from meshroom.ui.components.filepath import FilepathHelper
     from meshroom.ui.components.scene3D import Scene3DHelper, TrackballController
 
     qmlRegisterType(EdgeMouseArea, "GraphEditor", 1, 0, "EdgeMouseArea")
+    qmlRegisterType(ClipboardHelper, "Meshroom.Helpers", 1, 0, "ClipboardHelper")  # TODO: uncreatable
     qmlRegisterType(FilepathHelper, "Meshroom.Helpers", 1, 0, "FilepathHelper")  # TODO: uncreatable
     qmlRegisterType(Scene3DHelper, "Meshroom.Helpers", 1, 0, "Scene3DHelper")  # TODO: uncreatable
     qmlRegisterType(TrackballController, "Meshroom.Helpers", 1, 0, "TrackballController")

meshroom/ui/components/clipboard.py

@@ -0,0 +1,20 @@
+from PySide2.QtCore import Slot, QObject
+from PySide2.QtGui import QClipboard
+
+
+class ClipboardHelper(QObject):
+    """
+    Simple wrapper around a QClipboard with methods exposed as Slots for QML use.
+    """
+
+    def __init__(self, parent=None):
+        super(ClipboardHelper, self).__init__(parent)
+        self._clipboard = QClipboard(parent=self)
+
+    @Slot(str)
+    def setText(self, value):
+        self._clipboard.setText(value)
+
+    @Slot()
+    def clear(self):
+        self._clipboard.clear()

meshroom/ui/qml/Utils/Clipboard.qml

@@ -0,0 +1,9 @@
+pragma Singleton
+import Meshroom.Helpers 1.0
+
+/**
+ * Clipboard singleton object to copy values to paste buffer.
+ */
+ClipboardHelper {
+
+}

meshroom/ui/qml/Utils/qmldir

@@ -5,5 +5,6 @@ SortFilterDelegateModel 1.0 SortFilterDelegateModel.qml
 Request 1.0 request.js
 Format 1.0 format.js
 # using singleton here causes random crash at application exit
+# singleton Clipboard 1.0 Clipboard.qml
 # singleton Filepath 1.0 Filepath.qml
 # singleton Scene3DHelper 1.0 Scene3DHelper.qml

meshroom/ui/qml/Viewer3D/Inspector3D.qml

@@ -289,9 +289,7 @@ FloatingPane {
                             }
                             MenuItem {
                                 text: "Copy Path"
-                                // hidden TextEdit to copy to clipboard
+                                onTriggered: Clipboard.setText(Filepath.normpath(model.source))
-                                TextEdit { id: fullpath; visible: false; text: Filepath.normpath(model.source) }
-                                onTriggered: { fullpath.selectAll(); fullpath.copy(); }
                             }
                             MenuSeparator {}
                             MenuItem {