[ui] Add a "Clear All Images" action and update "Clear Images"'s behaviour

"Clear Images" used to clear the intrinsics and viewpoints for all the
existing CameraInit nodes in the graph. There was no-user friendly way
to clear the images of a specific CameraInit node.

This commit modifies the behaviour of "Clear Images" so that it only
deletes the intrinsics and viewpoints of the current CameraInit. A new menu
action, "Clear All Images", is added in the "Advanced" sub-menu, and
deletes all the intrinsics and viewpoints for all the CameraInit nodes.

The way images are cleared is also modified: instead of removing the
intrinsics and viewpoints attributes, they are reset. To be undone
properly, a corresponding "ClearImagesCommand" has been added. This offers
a great performance increase (clearing 1000 images now takes 1s).

Tooltips have been added to make the distinction clearer for users.

meshroom/ui/commands.py

@@ -350,6 +350,31 @@ class ListAttributeRemoveCommand(GraphCommand):
         listAttribute.insert(self.index, self.value)
 
 
+class ClearImagesCommand(GraphCommand):
+    def __init__(self, graph, cameraInitNodes, parent=None):
+        super(ClearImagesCommand, self).__init__(graph, parent)
+        self.cameraInits = cameraInitNodes
+        self.viewpoints = { cameraInit.name: cameraInit.attribute("viewpoints").getExportValue() for cameraInit in self.cameraInits }
+        self.intrinsics = { cameraInit.name: cameraInit.attribute("intrinsics").getExportValue() for cameraInit in self.cameraInits }
+        self.title = "Clear{}Images".format(" " if len(self.cameraInits) == 1 else " All ")
+        self.setText(self.title)
+
+    def redoImpl(self):
+        for i in range(len(self.cameraInits)):
+            # Reset viewpoints
+            self.cameraInits[i].viewpoints.resetValue()
+            self.cameraInits[i].viewpoints.valueChanged.emit()
+            # Reset intrinsics
+            self.cameraInits[i].intrinsics.resetValue()
+            self.cameraInits[i].intrinsics.valueChanged.emit()
+
+    def undoImpl(self):
+        for cameraInit in self.viewpoints:
+            with GraphModification(self.graph):
+                self.graph.node(cameraInit).viewpoints.value = self.viewpoints[cameraInit]
+                self.graph.node(cameraInit).intrinsics.value = self.intrinsics[cameraInit]
+
+
 class MoveNodeCommand(GraphCommand):
     """ Move a node to a given position. """
     def __init__(self, graph, node, position, parent=None):

meshroom/ui/graph.py

@@ -733,6 +733,16 @@ class UIGraph(QObject):
     def removeAttribute(self, attribute):
         self.push(commands.ListAttributeRemoveCommand(self._graph, attribute))
 
+    @Slot()
+    def clearImages(self):
+        with self.groupedGraphModification("Clear Images"):
+            self.push(commands.ClearImagesCommand(self._graph, [self.cameraInit]))
+
+    @Slot()
+    def clearAllImages(self):
+        with self.groupedGraphModification("Clear All Images"):
+            self.push(commands.ClearImagesCommand(self._graph, list(self.cameraInits)))
+
     @Slot(Node)
     def appendSelection(self, node):
         """ Append 'node' to the selection if it is not already part of the selection. """

meshroom/ui/qml/main.qml

@@ -427,6 +427,26 @@ ApplicationWindow {
         uigraph: _reconstruction
     }
 
+    Action {
+        id: clearImagesAction
+        property string tooltip: "Clear images for the current CameraInit group"
+        text: "Clear Images"
+        onTriggered: {
+            _reconstruction.clearImages()
+            _reconstruction.selectedViewId = "-1"
+        }
+    }
+
+    Action {
+        id: clearAllImagesAction
+        property string tooltip: "Clear all the images for all the CameraInit groups"
+        text: "Clear All Images"
+        onTriggered: {
+            _reconstruction.clearAllImages()
+            _reconstruction.selectedViewId = "-1"
+        }
+    }
+
     Action {
         id: undoAction
 
@@ -638,13 +658,12 @@ ApplicationWindow {
                 }
             }
 
-            Action {
-                id: clearImagesAction
-                text: "Clear Images"
-                onTriggered: {
-                    _reconstruction.clearImages()
-                }
+            MenuItem {
+                action: clearImagesAction
+                ToolTip.visible: hovered
+                ToolTip.text: clearImagesAction.tooltip
             }
+
             MenuSeparator { }
             Menu {
                 id: advancedMenu
@@ -677,6 +696,12 @@ ApplicationWindow {
                         importProjectDialog.open();
                     }
                 }
+
+                MenuItem {
+                    action: clearAllImagesAction
+                    ToolTip.visible: hovered
+                    ToolTip.text: clearAllImagesAction.tooltip
+                }
             }
             MenuSeparator { }
             Action {

meshroom/ui/reconstruction.py

@@ -694,26 +694,6 @@ class Reconstruction(UIGraph):
         """ Get all view Ids involved in the reconstruction. """
         return [vp.viewId.value for node in self._cameraInits for vp in node.viewpoints.value]
 
-    @Slot()
-    def clearImages(self):
-        """ Clear the list of viewpoints and intrinsics for all the CameraInit nodes. """
-        with self.groupedGraphModification("Clear Images"):
-            for cameraInit in self._cameraInits:
-                # Delete all viewpoints
-                viewpoints = cameraInit.attribute("viewpoints")
-                y = len(viewpoints.value) - 1
-                while y >= 0:
-                    self.removeAttribute(viewpoints.value[y])
-                    y = y - 1
-
-                # Delete all intrinsics
-                intrinsics = cameraInit.attribute("intrinsics")
-                z = len(intrinsics.value) - 1
-                while z >= 0:
-                    self.removeAttribute(intrinsics.value[z])
-                    z = z - 1
-
-
     @Slot(QObject, Node)
     def handleFilesDrop(self, drop, cameraInit):
         """ Handle drop events aiming to add images to the Reconstruction.