[ui] sequence player: draw cached frames indicator

meshroom/ui/qml/Viewer/SequencePlayer.qml

@@ -4,6 +4,7 @@ import QtQuick.Layouts 1.3
 
 import Controls 1.0
 import MaterialIcons 2.2
+import Utils 1.0
 
 /**
  * The Sequence Player is a UI for manipulating
@@ -60,6 +61,9 @@ FloatingPane {
         }
     }
 
+    // Exposed properties
+    property var viewer: null
+
     // Update the frame property
     // when the selected view ID is changed externally
     Connections {
@@ -181,6 +185,30 @@ FloatingPane {
                     frameSlider.value = m.frame;
                 }
             }
+
+            property real frameLength: m.sortedViewIds.length > 0 ? width / m.sortedViewIds.length : 0
+
+            background: Rectangle {
+                x: frameSlider.leftPadding
+                y: frameSlider.topPadding + frameSlider.height / 2 - height / 2
+                width: frameSlider.availableWidth
+                height: 4
+                radius: 2
+                color: Colors.grey
+
+                Repeater {
+                    model: viewer ? viewer.cachedFrames : []
+
+                    Rectangle {
+                        x: modelData * frameSlider.frameLength
+                        y: 0
+                        width: frameSlider.frameLength
+                        height: 4
+                        radius: 2
+                        color: Colors.blue
+                    }
+                }
+            }
         }
 
         RowLayout {

meshroom/ui/qml/Viewer/Viewer2D.qml

@@ -434,7 +434,8 @@ FocusScope {
                                 'surface.msfmData': Qt.binding(function() { return (msfmDataLoader.status === Loader.Ready && msfmDataLoader.item != null && msfmDataLoader.item.status === 2) ? msfmDataLoader.item : null; }),
                                 'canBeHovered': false,
                                 'idView': Qt.binding(function() { return (_reconstruction ? _reconstruction.selectedViewId : -1); }),
-                                'cropFisheye': false
+                                'cropFisheye': false,
+                                'sequence': Qt.binding(function() { return ((_reconstruction && _reconstruction.viewpoints) ? _reconstruction.allImagePaths() : []) })
                                 })
                           } else {
                                 // Force the unload (instead of using Component.onCompleted to load it once and for all) is necessary since Qt 5.14
@@ -1301,6 +1302,7 @@ FocusScope {
                     id: sequencePlayer
                     anchors.margins: 0
                     Layout.fillWidth: true
+                    viewer: floatImageViewerLoader.status === Loader.Ready ? floatImageViewerLoader.item : null
                 }
             }
         }

meshroom/ui/reconstruction.py

@@ -696,6 +696,7 @@ class Reconstruction(UIGraph):
         self.sfmAugmented.emit(first, last)
         return sfm[0], sfm[-1]
 
+    @Slot(result="QVariantList")
     def allImagePaths(self):
         """ Get all image paths in the reconstruction. """
         return [vp.path.value for node in self._cameraInits for vp in node.viewpoints.value]