[ui] introduce first functional UI with a graph editor

First functional UI that allows to visualize, modify and execute a graph locally.
* use QtQuick Controls 2 + Shapes (Qt >=5.10)
* main menu to save/load a graph

meshroom/ui/qml/AttributeEditor.qml

@@ -0,0 +1,60 @@
+import QtQuick 2.9
+import QtQuick.Layouts 1.3
+import QtQuick.Controls 2.2
+
+/**
+  A component to display and edit a Node's attributes.
+*/
+ColumnLayout {
+    id: root
+
+    // the node to edit
+    property variant node: null
+
+    SystemPalette { id: palette }
+
+    Button {
+        text: "Open Node Folder"
+        onClicked: Qt.openUrlExternally("file://" + node.internalFolder)
+        ToolTip.text: node.internalFolder
+        ToolTip.visible: hovered
+    }
+
+    ListView {
+        id: attributesListView
+
+        Layout.fillHeight: true
+        Layout.fillWidth: true
+        clip: true
+        spacing: 4
+        ScrollBar.vertical: ScrollBar {}
+
+        model: node ? node.attributes : undefined
+
+        delegate: RowLayout {
+            width: attributesListView.width
+            spacing: 4
+
+            Label {
+                id: parameterLabel
+                text: object.label
+                Layout.preferredWidth: 200
+                color: object.isOutput ? "orange" : palette.text
+                ToolTip.text: object.desc.description
+                ToolTip.visible: parameterMA.containsMouse
+                ToolTip.delay: 200
+                MouseArea {
+                    id: parameterMA
+                    anchors.fill: parent
+                    hoverEnabled: true
+                }
+            }
+
+            AttributeItemDelegate {
+                Layout.fillWidth: true
+                height: childrenRect.height
+                attribute: object
+            }
+        }
+    }
+}

meshroom/ui/qml/AttributeItemDelegate.qml

@@ -0,0 +1,173 @@
+import QtQuick 2.9
+import QtQuick.Layouts 1.3
+import QtQuick.Controls 2.2
+
+/**
+  Instantiate a control to visualize and edit an Attribute based on its type.
+*/
+Loader {
+    id: root
+    property variant attribute: null
+
+    sourceComponent: {
+        switch(attribute.type)
+        {
+        case "ChoiceParam": return attribute.desc.exclusive ? comboBox_component : multiChoice_component
+        case "IntParam": return slider_component
+        case "FloatParam": return slider_component
+        case "BoolParam": return checkbox_component
+        case "ListAttribute": return listAttribute_component
+        case "GroupAttribute": return groupAttribute_component
+        default: return textField_component
+        }
+    }
+
+    Component {
+        id: textField_component
+        TextField {
+            text: attribute.value
+            readOnly: attribute.isOutput || attribute.isLink
+            selectByMouse: true
+            onEditingFinished: _reconstruction.setAttribute(attribute, text.trim())
+        }
+    }
+
+    Component {
+        id: comboBox_component
+        ComboBox {
+            model: attribute.desc.values
+            enabled: !attribute.isOutput && !attribute.isLink
+            Component.onCompleted: currentIndex = find(attribute.value)
+            onActivated: _reconstruction.setAttribute(attribute, currentText)
+            Connections {
+                target: attribute
+                onValueChanged: currentIndex = find(attribute.value)
+            }
+        }
+    }
+
+    Component {
+        id: multiChoice_component
+        Flow {
+            Repeater {
+                id: checkbox_repeater
+                model: attribute.desc.values
+                delegate: CheckBox {
+                    text: modelData
+                    checked: attribute.value.indexOf(modelData) >= 0
+                    onToggled: {
+                        var t = attribute.value
+                        if(!checked) { t.splice(t.indexOf(modelData), 1) } // remove element
+                        else { t.push(modelData) }                         // add element
+                        _reconstruction.setAttribute(attribute, t)
+                    }
+                }
+            }
+        }
+    }
+
+    Component {
+        id: slider_component
+        RowLayout {
+            Slider {
+                id: s
+                Layout.fillWidth: true
+                value: attribute.value
+                // TODO: range from desc
+
+                onPressedChanged: {
+                    if(!pressed)
+                        _reconstruction.setAttribute(attribute, value)
+                }
+            }
+            IntValidator {
+                id: intValidator
+            }
+            DoubleValidator {
+                id: doubleValidator
+            }
+            TextField {
+                text: attribute.value
+                selectByMouse: true
+                validator: attribute.type == "FloatParam" ? doubleValidator : intValidator
+                onEditingFinished: _reconstruction.setAttribute(attribute, text)
+            }
+        }
+    }
+
+    Component {
+        id: checkbox_component
+        Row {
+            CheckBox {
+                checked: attribute.value
+                onToggled: _reconstruction.setAttribute(attribute, !attribute.value)
+            }
+        }
+    }
+
+    Component {
+        id: listAttribute_component
+        RowLayout {
+            width: parent.width
+            Label {
+                Layout.alignment: Qt.AlignTop
+                text: attribute.value.count + " elements"
+            }
+            Button {
+                Layout.alignment: Qt.AlignTop
+                text: "+"
+                onClicked: _reconstruction.appendAttribute(attribute, undefined)
+            }
+            ListView {
+                id: lv
+                model: attribute.value
+                implicitHeight: childrenRect.height
+                Layout.fillWidth: true
+
+                delegate:  RowLayout {
+                    id: item
+                    property var childAttrib: object
+                    layoutDirection: Qt.RightToLeft
+                    //height: childrenRect.height
+                    width: lv.width
+                    Component.onCompleted: {
+                        var cpt = Qt.createComponent("AttributeItemDelegate.qml")
+                        var obj = cpt.createObject(item, {'attribute': Qt.binding(function() { return item.childAttrib })})
+                        obj.Layout.fillWidth = true
+                    }
+                    Button {
+                        text: "-"
+                        onClicked: _reconstruction.removeAttribute(item.childAttrib)
+                    }
+                }
+            }
+        }
+    }
+
+    Component {
+        id: groupAttribute_component
+        ListView {
+            id: someview
+            model: attribute.value
+            implicitWidth: parent.width
+            implicitHeight: childrenRect.height
+            onCountChanged: forceLayout()
+            spacing: 4
+
+            delegate: RowLayout {
+                id: row
+                width: someview.width
+                //height: childrenRect.height
+                property var childAttrib: object
+
+                Label { text: childAttrib.name }
+                Component.onCompleted:  {
+                    var cpt = Qt.createComponent("AttributeItemDelegate.qml")
+                    var obj = cpt.createObject(row, {'attribute': Qt.binding(function() { return row.childAttrib })})
+                    obj.Layout.fillWidth = true
+                }
+            }
+        }
+    }
+
+}

meshroom/ui/qml/AttributePin.qml

@@ -0,0 +1,114 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.3
+
+/**
+  The representation of an Attribute on a Node.
+*/
+Row {
+    id: root
+
+    property var nodeItem
+    property var attribute
+
+    // position of the anchor for attaching and edge to this attribute pin
+    readonly property point edgeAnchorPos: Qt.point(edgeAnchor.x + edgeAnchor.width/2,
+                                                    edgeAnchor.y + edgeAnchor.height/2)
+
+    objectName: attribute.name + "."
+    layoutDirection: attribute.isOutput ? Qt.RightToLeft : Qt.LeftToRight
+    spacing: 1
+
+    Rectangle {
+        id: edgeAnchor
+
+        width: 6
+        height: width
+        radius: width/2
+        anchors.verticalCenter: parent.verticalCenter
+        border.color: "#3e3e3e"
+        color: (dropArea.containsDrag && dropArea.containsDrag) || attribute.isLink ? "#3e3e3e" : "white"
+
+        DropArea {
+            id: dropArea
+
+            property bool acceptableDrop: false
+
+            anchors.fill: parent
+
+            onEntered: {
+                // Filter drops:
+                if( drag.source.objectName != dragTarget.objectName  // not an edge connector
+                   ||  drag.source.nodeItem == dragTarget.nodeItem   // connection between attributes of the same node
+                   || (dragTarget.isOutput)                          // connection on an output
+                   || dragTarget.attribute.isLink)                   // already connected attribute
+                {
+                    drag.accepted = false
+                }
+                dropArea.acceptableDrop = drag.accepted
+            }
+            onExited: acceptableDrop = false
+
+            onDropped: {
+                _reconstruction.addEdge(drag.source.attribute, dragTarget.attribute)
+            }
+        }
+
+        Item {
+            id: dragTarget
+            objectName: "edgeConnector"
+            readonly property alias attribute: root.attribute
+            readonly property alias nodeItem: root.nodeItem
+            readonly property bool isOutput: attribute.isOutput
+            anchors.centerIn: root.state == "Dragging" ? undefined : parent
+            //anchors.verticalCenter: root.verticalCenter
+            width: 2
+            height: 2
+            Drag.active: connectMA.drag.active
+            Drag.hotSpot.x: width*0.5
+            Drag.hotSpot.y: height*0.5
+        }
+
+        MouseArea {
+            id: connectMA
+            drag.target: dragTarget
+            drag.threshold: 0
+            anchors.fill: parent
+            onReleased: dragTarget.Drag.drop()
+        }
+
+        Edge {
+            id: connectEdge
+            visible: false
+            point1x: parent.width / 2
+            point1y: parent.width / 2
+            point2x: dragTarget.x + dragTarget.width/2
+            point2y: dragTarget.y + dragTarget.height/2
+        }
+    }
+
+    // Attribute name
+    Label {
+        text: attribute.name
+        font.pointSize: 5
+        color: "#333"  // TODO: style
+    }
+
+    state: connectMA.pressed ? "Dragging" : ""
+
+    states: [
+        State {
+            name: ""
+        },
+
+        State {
+            name: "Dragging"
+            PropertyChanges {
+                target: connectEdge
+                z: 100
+                visible: true
+            }
+
+        }
+    ]
+
+}

meshroom/ui/qml/Edge.qml

@@ -0,0 +1,65 @@
+import QtQuick 2.9
+import GraphEditor 1.0
+import QtQuick.Shapes 1.0
+
+/**
+    A cubic spline representing an edge, going from point1 to point2, providing mouse interaction.
+*/
+Shape {
+    id: root
+
+    property var edge
+    property real point1x
+    property real point1y
+    property real point2x
+    property real point2y
+    property alias thickness: path.strokeWidth
+    property color color
+
+    signal pressed(var event)
+    signal released(var event)
+
+    x: point1x
+    y: point1y
+    width: point2x - point1x
+    height: point2y - point1y
+
+    property real startX: 0
+    property real startY: 0
+    property real endX: width
+    property real endY: height
+
+    // cause rendering artifacts when enabled (and don't support hot reload really well)
+    vendorExtensionsEnabled: false
+
+    ShapePath {
+        id: path
+        startX: root.startX
+        startY: root.startY
+        fillColor: "transparent"
+        // BUG: edgeArea is destroyed before path, need to test if not null to avoid warnings
+        strokeColor: edgeArea && edgeArea.containsMouse ? "#E91E63" : "#3E3E3E"
+        capStyle: ShapePath.RoundCap
+        strokeWidth: 1
+
+        PathCubic {
+            id: cubic
+            property real curveScale: 0.7
+            property real ctrlPtDist: Math.abs(root.width * curveScale)
+            x: root.endX
+            y: root.endY
+            relativeControl1X: ctrlPtDist; relativeControl1Y: 0
+            control2X: x - ctrlPtDist; control2Y: y
+        }
+    }
+
+    EdgeMouseArea {
+        id: edgeArea
+        anchors.fill: parent
+        curveScale: cubic.curveScale
+        acceptedButtons: Qt.LeftButton | Qt.RightButton
+        thickness: root.thickness + 2
+        onPressed: root.pressed(arguments[0])   // can't get named args, use arguments array
+        onReleased: root.released(arguments[0])
+    }
+}

meshroom/ui/qml/GraphEditor.qml

@@ -0,0 +1,198 @@
+import QtQuick 2.7
+import QtQuick.Controls 2.0
+import QtQuick.Layouts 1.3
+
+/**
+  A component displaying a Graph (nodes, attributes and edges).
+*/
+Item {
+    id: root
+
+    property variant graph: null
+
+    property variant selectedNode: null
+
+    property int nodeWidth: 140
+    property int nodeHeight: 40
+    property int gridSpacing: 10
+    property var _attributeToDelegate: ({})
+
+    // signals
+    signal workspaceMoved()
+    signal workspaceClicked()
+
+    clip: true
+    // Activate multisampling for edges antialiasing
+    layer.enabled: true
+    layer.samples: 8
+
+    MouseArea {
+        id: mouseArea
+        anchors.fill: parent
+        property double factor: 1.15
+
+        hoverEnabled: true
+        acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
+        drag.threshold: 0
+        onWheel: {
+            var zoomFactor = wheel.angleDelta.y > 0 ? factor : 1/factor
+            if(Math.min(draggable.width*draggable.scale*zoomFactor, draggable.height*draggable.scale*zoomFactor) < 10)
+                return
+            var point = mapToItem(draggable, wheel.x, wheel.y)
+            draggable.x += (1-zoomFactor) * point.x * draggable.scale
+            draggable.y += (1-zoomFactor) * point.y * draggable.scale
+            draggable.scale *= zoomFactor
+            draggable.scale = draggable.scale.toFixed(2)
+            workspaceMoved()
+        }
+
+        onPressed: {
+            if(mouse.button & Qt.MiddleButton)
+                drag.target = draggable // start drag
+        }
+        onReleased: {
+            drag.target = undefined // stop drag
+            workspaceClicked()
+        }
+        onPositionChanged: {
+            if(drag.active)
+                workspaceMoved()
+        }
+        Item {
+            id: draggable
+            transformOrigin: Item.TopLeft
+            width: 1000
+            height: 1000
+
+            // Edges
+            Repeater {
+                id: edgesRepeater
+
+                // delay edges loading after nodes (edges needs attribute pins to be created)
+                model: nodeRepeater.loaded ? root.graph.edges : undefined
+
+                delegate: Edge {
+                    property var src: root._attributeToDelegate[edge.src]
+                    property var dst: root._attributeToDelegate[edge.dst]
+                    property var srcAnchor: src.nodeItem.mapFromItem(src, src.edgeAnchorPos.x, src.edgeAnchorPos.y)
+                    property var dstAnchor: dst.nodeItem.mapFromItem(dst, dst.edgeAnchorPos.x, dst.edgeAnchorPos.y)
+
+                    edge: object
+                    point1x: src.nodeItem.x + srcAnchor.x
+                    point1y: src.nodeItem.y + srcAnchor.y
+                    point2x: dst.nodeItem.x + dstAnchor.x
+                    point2y: dst.nodeItem.y + dstAnchor.y
+                    onPressed: {
+                        if(event.button == Qt.RightButton)
+                            _reconstruction.removeEdge(edge)
+                    }
+                }
+            }
+
+            // Nodes
+            Repeater {
+                id: nodeRepeater
+
+                model: root.graph.nodes
+                property bool loaded: count === model.count
+                onLoadedChanged: if(loaded) { doAutoLayout() }
+
+                delegate: Node {
+                    node: object
+                    width: root.nodeWidth
+                    height: Math.max(root.nodeHeight, implicitHeight)
+                    radius: 1
+                    border.color: root.selectedNode == node ? Qt.darker(color, 1.8) : Qt.darker(color, 1.1)
+
+                    onAttributePinCreated: root._attributeToDelegate[attribute] = pin
+
+                    onPressed: {
+                        root.selectedNode = object
+                    }
+
+                    Behavior on x {
+                        NumberAnimation {}
+                    }
+                    Behavior on y {
+                        NumberAnimation {}
+                    }
+                }
+            }
+        }
+    }
+
+    Row {
+        anchors.bottom: parent.bottom
+
+        Button {
+            text: "Fit"
+            onClicked: root.fit()
+            z: 10
+        }
+
+        Button {
+            text: "AutoLayout"
+            onClicked: root.doAutoLayout()
+            z: 10
+        }
+    }
+
+    // Fit graph to fill root
+    function fit() {
+        // compute bounding box
+        var first = nodeRepeater.itemAt(0)
+        var bbox = Qt.rect(first.x, first.y, 1, 1)
+        for(var i=0; i<root.graph.nodes.count; ++i) {
+            var item = nodeRepeater.itemAt(i)
+            bbox.x = Math.min(bbox.x, item.x)
+            bbox.y = Math.min(bbox.y, item.y)
+            bbox.width = Math.max(bbox.width, item.x+item.width)
+            bbox.height = Math.max(bbox.height, item.y+item.height)
+        }
+        bbox.width -= bbox.x
+        bbox.height -= bbox.y
+        // rescale
+        draggable.scale = Math.min(root.width/bbox.width, root.height/bbox.height)
+        // recenter
+        draggable.x = bbox.x*draggable.scale*-1 + (root.width-bbox.width*draggable.scale)*0.5
+        draggable.y = bbox.y*draggable.scale*-1 + (root.height-bbox.height*draggable.scale)*0.5
+    }
+
+    // Really basic auto-layout based on node depths
+    function doAutoLayout()
+    {
+        var grid = new Array(nodeRepeater.count)
+        for(var i=0; i< nodeRepeater.count; ++i)
+            grid[i] = new Array(nodeRepeater.count)
+        for(var i=0; i<nodeRepeater.count; ++i)
+        {
+            var obj = nodeRepeater.itemAt(i);
+        }
+
+        for(var i=0; i<nodeRepeater.count; ++i)
+        {
+            var obj = nodeRepeater.itemAt(i);
+            var j=0;
+            while(1)
+            {
+                if(grid[obj.node.depth][j] == undefined)
+                {
+                    grid[obj.node.depth][j] = obj;
+                    break;
+                }
+                j++;
+            }
+        }
+        for(var x= 0; x<nodeRepeater.count; ++x)
+        {
+            for(var y=0; y<nodeRepeater.count; ++y)
+            {
+                if(grid[x][y] != undefined)
+                {
+                    grid[x][y].x = x * (root.nodeWidth + root.gridSpacing)
+                    grid[x][y].y = y * (root.nodeHeight + root.gridSpacing)
+                }
+            }
+        }
+    }
+}

meshroom/ui/qml/Node.qml

@@ -0,0 +1,138 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.2
+import QtQuick.Layouts 1.3
+
+Rectangle {
+    id: root
+    property variant node: object
+    property color baseColor: "#607D8B"
+
+    signal pressed(var mouse)
+    signal attributePinCreated(var attribute, var pin)
+
+    implicitHeight: body.height + 4
+
+    opacity: 0.9
+
+    MouseArea {
+        anchors.fill: parent
+        drag.target: parent
+        drag.threshold: 0
+        hoverEnabled: true
+        acceptedButtons: Qt.LeftButton | Qt.RightButton
+        onPressed: {
+            if(mouse.button == Qt.RightButton)
+                nodeMenu.popup()
+            root.pressed(mouse)
+        }
+
+        Menu {
+            id: nodeMenu
+            MenuItem {
+                text: "Compute"
+                onTriggered: _reconstruction.execute(node)
+            }
+            MenuItem {
+                text: "Open Folder"
+                onTriggered: Qt.openUrlExternally(node.internalFolder)
+            }
+            MenuSeparator {}
+            MenuItem {
+                text: "Delete"
+                onTriggered: _reconstruction.removeNode(node)
+            }
+        }
+    }
+
+    Column {
+        id: body
+        width: parent.width
+
+        Label {
+            width: parent.width
+            horizontalAlignment: Text.AlignHCenter
+            padding: 2
+            text: node.nodeType
+            color: "#EEE"
+            font.pointSize: 8
+        }
+
+        RowLayout  {
+            width: parent.width + 6
+            anchors.horizontalCenter: parent.horizontalCenter
+
+            Column {
+                id: inputs
+                Layout.fillWidth: true
+                Layout.fillHeight: true
+                Repeater {
+                    model: node.attributes
+                    delegate: Loader {
+                        active: !object.isOutput && object.type == "File" // TODO: review this
+
+                        sourceComponent: AttributePin {
+                            id: inPin
+                            nodeItem: root
+                            attribute: object
+                            Component.onCompleted: attributePinCreated(object, inPin)
+                        }
+                    }
+                }
+            }
+            Column {
+                id: outputs
+                Layout.fillWidth: true
+                Layout.fillHeight: true
+                anchors.right: parent.right
+                Repeater {
+                    model: node.attributes
+
+                    delegate: Loader {
+                        active: object.isOutput
+                        anchors.right: parent.right
+
+                        sourceComponent: AttributePin {
+                            id: outPin
+                            nodeItem: root
+                            attribute: object
+                            Component.onCompleted: attributePinCreated(object, outPin)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    StateGroup {
+        id: status
+
+        state: node.statusName
+
+        states: [
+            State {
+                name: "NONE"
+                PropertyChanges { target: root; color: baseColor}
+            },
+            State {
+                name: "SUBMITTED_EXTERN"
+                PropertyChanges { target: root; color: "#2196F3"}
+            },
+            State {
+                name: "SUBMITTED_LOCAL"
+                PropertyChanges { target: root; color: "#009688"}
+            },
+            State {
+                name: "RUNNING"
+                PropertyChanges { target: root; color: "#FF9800"}
+            },
+            State {
+                name: "ERROR"
+                PropertyChanges { target: root; color: "#F44336"}
+            },
+            State {
+                name: "SUCCESS"
+                PropertyChanges { target: root; color: "#4CAF50"}
+            }
+        ]
+    }
+}

meshroom/ui/qml/main.qml

@@ -1,7 +1,9 @@
-import QtQuick 2.5
-import QtQuick.Controls 1.4 // as Controls1
-//import QtQuick.Controls 2.2
+import QtQuick 2.7
+import QtQuick.Controls 2.3
 import QtQuick.Layouts 1.1
+import QtQuick.Window 2.3
+import QtQml.Models 2.2
+import Qt.labs.platform 1.0 as Platform
 
 ApplicationWindow {
     id: _window
@@ -9,129 +11,221 @@ ApplicationWindow {
     width: 1280
     height: 720
     visible: true
-    title: "Meshroom"
-    color: "#fafafa"
+    title: (_reconstruction.filepath ? _reconstruction.filepath : "Untitled") + (_reconstruction.undoStack.clean ? "" : "*") + " - Meshroom"
+    font.pointSize: 10
 
     property variant node: null
 
-    Connections {
-        target: _reconstruction.undoStack
-        onIndexChanged: graphStr.update()
+    onClosing: {
+        // make sure document is saved before exiting application
+        close.accepted = false
+        ensureSaved(function(){ Qt.quit() })
+    }
+
+    Dialog {
+        id: unsavedDialog
+
+        property var _callback: undefined
+
+        title: "Unsaved Document"
+        modal: true
+        x: parent.width/2 - width/2
+        y: parent.height/2 - height/2
+        standardButtons: Dialog.Save | Dialog.Cancel | Dialog.Discard
+
+        onDiscarded: {
+            close() // BUG ? discard does not close window
+            fireCallback()
+        }
+
+        onAccepted: {
+            // save current file
+            if(saveAction.enabled)
+            {
+                saveAction.trigger()
+                fireCallback()
+            }
+            // open "save as" dialog
+            else
+            {
+                saveFileDialog.open()
+                function _callbackWrapper(rc) {
+                    if(rc == Platform.Dialog.Accepted)
+                        fireCallback()
+                    saveFileDialog.closed.disconnect(_callbackWrapper)
+                }
+                saveFileDialog.closed.connect(_callbackWrapper)
+            }
+        }
+
+        function fireCallback()
+        {
+            // call the callback and reset it
+            if(_callback)
+                _callback()
+            _callback = undefined
+        }
+
+        /// Open the unsaved dialog warning with an optional
+        /// callback to fire when the dialog is accepted/discarded
+        function prompt(callback)
+        {
+            _callback = callback
+            open()
+        }
+
+        Label {
+            text: "Your current Graph is not saved"
+        }
+    }
+
+    Platform.FileDialog {
+        id: saveFileDialog
+
+        signal closed(var result)
+
+        title: "Save File"
+        nameFilters: ["Meshroom Graphs (*.mg)"]
+        defaultSuffix: ".mg"
+        fileMode: Platform.FileDialog.SaveFile
+        onAccepted: {
+            _reconstruction.saveAs(file)
+            closed(Platform.Dialog.Accepted)
+        }
+        onRejected: closed(Platform.Dialog.Rejected)
+    }
+
+    Platform.FileDialog {
+        id: openFileDialog
+        title: "Open File"
+        nameFilters: ["Meshroom Graphs (*.mg)"]
+        onAccepted: {
+            _reconstruction.loadUrl(file.toString())
+            graphEditor.doAutoLayout()
+        }
+    }
+
+    // Check if document has been saved
+    function ensureSaved(callback)
+    {
+        var saved = _reconstruction.undoStack.clean
+        // If current document is modified, open "unsaved dialog"
+        if(!saved)
+        {
+            unsavedDialog.prompt(callback)
+        }
+        else // otherwise, directly call the callback
+        {
+            callback()
+        }
+        return saved
+    }
+
+    Action {
+        id: undoAction
+
+        property string tooltip: 'Undo "' +_reconstruction.undoStack.undoText +'"'
+        text: "Undo"
+        shortcut: "Ctrl+Z"
+        enabled: _reconstruction.undoStack.canUndo
+        onTriggered: _reconstruction.undoStack.undo()
+    }
+    Action {
+        id: redoAction
+
+        property string tooltip: 'Redo "' +_reconstruction.undoStack.redoText +'"'
+        text: "Redo"
+        shortcut: "Ctrl+Shift+Z"
+        enabled: _reconstruction.undoStack.canRedo
+        onTriggered: _reconstruction.undoStack.redo()
+    }
+
+    header: MenuBar {
+        Menu {
+            title: "File"
+            Action {
+                text: "New"
+                onTriggered: ensureSaved(function() { _reconstruction.new(); graphEditor.doAutoLayout() })
+            }
+            Action {
+                text: "Open"
+                shortcut: "Ctrl+O"
+                onTriggered: ensureSaved(function() { openFileDialog.open() })
+            }
+            Action {
+                id: saveAction
+                text: "Save"
+                shortcut: "Ctrl+S"
+                enabled: _reconstruction.filepath != "" && !_reconstruction.undoStack.clean
+                onTriggered: _reconstruction.save()
+            }
+            Action {
+                id: saveAsAction
+                text: "Save As..."
+                shortcut: "Ctrl+Shift+S"
+                onTriggered: saveFileDialog.open()
+            }
+            MenuSeparator { }
+            Action {
+                text: "Quit"
+                onTriggered: Qt.quit()
+            }
+        }
+        Menu {
+            title: "Edit"
+            MenuItem {
+                action: undoAction
+                ToolTip.visible: hovered
+                ToolTip.text: undoAction.tooltip
+            }
+            MenuItem {
+                action: redoAction
+                ToolTip.visible: hovered
+                ToolTip.text: redoAction.tooltip
+            }
+        }
     }
 
     ColumnLayout {
         anchors.fill: parent
         anchors.margins: 4
-        Row
-        {
+        Row {
+            spacing: 1
             Layout.fillWidth: true
-            TextField {
-                id: filepath
-                width: 200
-            }
-            Button {
-                text: "Load"
-                onClicked: _reconstruction.graph.load(filepath.text)
-            }
 
             Button {
-                text: "Add Node"
-                onClicked: {
-                    _reconstruction.addNode("FeatureExtraction")
-                }
-            }
-
-            Item {width: 4; height: 1}
-
-            Button {
-                text: "Undo"
-                activeFocusOnPress: true
-                enabled: _reconstruction.undoStack.canUndo
-                tooltip:  'Undo "' +_reconstruction.undoStack.undoText +'"'
-                onClicked: {
-                    _reconstruction.undoStack.undo()
-                }
+                text: "Execute"
+                enabled: _reconstruction.graph.nodes.count && !_reconstruction.computing
+                onClicked: _reconstruction.execute(null)
             }
             Button {
-                text: "Redo"
-                activeFocusOnPress: true
-                enabled: _reconstruction.undoStack.canRedo
-                tooltip:  'Redo "' +_reconstruction.undoStack.redoText +'"'
-                onClicked: {
-                    _reconstruction.undoStack.redo()
-                }
+                text: "Stop"
+                enabled: _reconstruction.computing
+                onClicked: _reconstruction.stopExecution()
             }
         }
+        GraphEditor {
+            id: graphEditor
+            graph: _reconstruction.graph
+            Layout.fillWidth: true
+            Layout.preferredHeight: parent.height * 0.3
+            Layout.margins: 10
+        }
 
-        RowLayout{
+        Loader {
             Layout.fillWidth: true
             Layout.fillHeight: true
-
-            ListView {
-                Layout.fillHeight: true
-                Layout.preferredWidth: 150
-                model: _reconstruction.graph.nodes
-                onCountChanged: {
-                    graphStr.update()
-                }
-                spacing: 2
-                delegate: Rectangle {
-                    width: 130
-                    height: 40
-                    Label {
-                        text: object.name
-                        anchors.centerIn: parent
-                    }
-
-                    MouseArea {
-                        anchors.fill: parent
-                        acceptedButtons: Qt.AllButtons
-                        onClicked: {
-                            if(mouse.button == Qt.RightButton)
-                                _reconstruction.removeNode(object)
-                            else
-                                _window.node = object
-                        }
-
-                    }
-                    color: "#81d4fa"
-                    border.color: _window.node == object ? Qt.darker(color) : "transparent"
-                }
-            }
-
-            ListView {
-                id: attributesListView
-                Layout.fillHeight: true
-                Layout.fillWidth: true
-                model: _window.node != null ? _window.node.attributes : null
-                delegate: RowLayout {
-                    width: attributesListView.width
-                    spacing: 4
-                    Label {
-                        text: object.label
-                        anchors.verticalCenter: parent.verticalCenter
-                        Layout.preferredWidth: 200
-                    }
-                    TextField {
-                        text: object.value
-                        Layout.fillWidth: true
-                        onEditingFinished: _reconstruction.setAttribute(object, text)
-                    }
-                }
-            }
-
-
-            TextArea {
-                id: graphStr
-                Layout.preferredWidth: 400
-                Layout.fillHeight: true
-                wrapMode: TextEdit.WrapAnywhere
-                selectByMouse: true
-                readOnly: true
-                function update() {
-                    graphStr.text = _reconstruction.graph.asString()
+            active: graphEditor.selectedNode != null
+            sourceComponent: Component {
+                AttributeEditor {
+                    node: graphEditor.selectedNode
+                    // Disable editor when computing
+                    enabled: !_reconstruction.computing
                 }
             }
         }
     }
-}
+ }
+
+
+

meshroom/ui/reconstruction.py

@@ -1,18 +1,45 @@
+import os
 from threading import Thread
 
-from PySide2.QtCore import QObject, Slot, Property, Signal
+from PySide2.QtCore import QObject, Slot, Property, Signal, QJsonValue, QUrl
 
-from meshroom.core import graph
+from meshroom import multiview
+from meshroom.core import graph, defaultCacheFolder, cacheFolderName
 from meshroom.ui import commands
 
 
 class Reconstruction(QObject):
 
-    def __init__(self, parent=None):
+    def __init__(self, graphFilepath="", parent=None):
         super(Reconstruction, self).__init__(parent)
-        self._graph = graph.Graph("")
+        self._graph = None
         self._undoStack = commands.UndoStack(self)
         self._computeThread = Thread()
+        self._filepath = graphFilepath
+        if self._filepath:
+            self.load(self._filepath)
+        else:
+            self.new()
+
+    @Slot()
+    def new(self):
+        self.clear()
+        self._graph = multiview.photogrammetryPipeline()
+        self._graph.cacheDir = defaultCacheFolder
+        self.graphChanged.emit()
+
+    def clear(self):
+        if self._graph:
+            self._graph.deleteLater()
+            self._graph = None
+        self.setFilepath("")
+        self._undoStack.clear()
+
+    def setFilepath(self, path):
+        if self._filepath == path:
+            return
+        self._filepath = path
+        self.filepathChanged.emit()
 
     @Slot(str)
     def addNode(self, nodeType):
@@ -42,11 +69,27 @@ class Reconstruction(QObject):
     def removeAttribute(self, attribute):
         self._undoStack.tryAndPush(commands.ListAttributeRemoveCommand(self._graph, attribute))
 
-    @Slot(str)
     def load(self, filepath):
+        self.clear()
+        self._graph = graph.Graph("")
         self._graph.load(filepath)
-        self._graph.update()
-        self._undoStack.clear()
+        self.setFilepath(filepath)
+        self.graphChanged.emit()
+
+    @Slot(QUrl)
+    def loadUrl(self, url):
+        self.load(url.toLocalFile())
+
+    @Slot(QUrl)
+    def saveAs(self, url):
+        self.setFilepath(url.toLocalFile())
+        self.save()
+
+    @Slot()
+    def save(self):
+        self._graph.save(self._filepath)
+        self._graph.cacheDir = os.path.join(os.path.dirname(self._filepath), cacheFolderName)
+        self._undoStack.setClean()
 
     @Slot(graph.Node)
     def execute(self, node=None):
@@ -70,7 +113,9 @@ class Reconstruction(QObject):
         self.computingChanged.emit()
 
     undoStack = Property(QObject, lambda self: self._undoStack, constant=True)
-    graph = Property(graph.Graph, lambda self: self._graph, constant=True)
-    nodes = Property(QObject, lambda self: self._graph.nodes, constant=True)
+    graphChanged = Signal()
+    graph = Property(graph.Graph, lambda self: self._graph, notify=graphChanged)
     computingChanged = Signal()
-    computing = Property(bool, lambda self: self._computeThread.is_alive(), notify=computingChanged)
+    computing = Property(bool, lambda self: self._computeThread.is_alive(), notify=computingChanged)
+    filepathChanged = Signal()
+    filepath = Property(str, lambda self: self._filepath, notify=filepathChanged)