[ui] wip: add ImageGallery + Viewer2D to main layout

* ImageGallery displays images from CameraInit.viewpoints
* support drag&drop of images
* Viewer2D displays and allows basic manipulation of currently selected image

meshroom/ui/qml/ImageGallery.qml

@@ -0,0 +1,85 @@
+import QtQuick 2.7
+import QtQuick.Controls 2.3
+import QtQuick.Controls 1.4 as Controls1 // For SplitView
+import QtQuick.Layouts 1.3
+import Qt.labs.platform 1.0 as Platform
+import "Viewer" 1.0
+
+
+Item {
+    property alias model: grid.model
+    implicitWidth: 300
+    implicitHeight: 400
+
+    clip: true
+
+    SystemPalette {
+        id: palette
+    }
+
+    Controls1.SplitView {
+        anchors.fill: parent
+        GridView {
+            id: grid
+            Layout.fillWidth: true
+            Layout.fillHeight: true
+            Layout.minimumWidth: cellWidth
+            cellWidth: 160
+            cellHeight: 120
+            ScrollBar.vertical: ScrollBar {}
+            keyNavigationEnabled: true
+            highlightFollowsCurrentItem: true
+            focus: true
+
+            delegate: Item {
+                property url source: object.value.get("path").value
+                width: grid.cellWidth
+                height: grid.cellHeight
+                Image {
+                    anchors.fill: parent
+                    anchors.margins: 8
+                    source:parent.source
+                    sourceSize: Qt.size(150, 150)
+                    asynchronous: true
+                    autoTransform: true
+                    fillMode: Image.PreserveAspectFit
+                }
+                Rectangle {
+                   color: palette.midlight
+                   anchors.fill: parent
+                   anchors.margins: 3
+                   border.color: palette.highlight
+                   border.width: imageMA.containsMouse || grid.currentIndex == index ? 2 : 0
+                   z: -1
+                   MouseArea {
+                       id: imageMA
+                       anchors.fill: parent
+                       hoverEnabled: true
+                       onClicked: {
+                           grid.currentIndex = index
+                           grid.forceActiveFocus()
+                       }
+                   }
+                }
+            }
+            DropArea {
+                id: dropArea
+                anchors.fill: parent
+                // TODO: onEntered: call specific method to filter files based on extension
+                onDropped: {
+                    _reconstruction.handleFilesDrop(drop)
+                }
+            }
+        }
+
+        Item {
+            implicitWidth: Math.round(parent.width * 0.4)
+            Layout.minimumWidth: 40
+            Viewer2D {
+                anchors.fill: parent
+                anchors.margins: 10
+                source: grid.currentItem.source
+            }
+        }
+    }
+}

meshroom/ui/qml/Viewer/Viewer2D.qml

@@ -0,0 +1,105 @@
+import QtQuick 2.7
+import QtQuick.Controls 2.0
+import QtQuick.Layouts 1.3
+
+FocusScope {
+    id: root
+
+    clip: true
+    property alias source: image.source
+
+    // slots
+    Keys.onPressed: {
+        if(event.key == Qt.Key_F) {
+            root.fit();
+            event.accepted = true;
+        }
+    }
+
+    // functions
+    function fit() {
+        if(image.status != Image.Ready)
+            return;
+        image.scale = Math.min(root.width/image.width, root.height/image.height)
+        image.x = Math.max((root.width-image.width*image.scale)*0.5, 0)
+        image.y = Math.max((root.height-image.height*image.scale)*0.5, 0)
+    }
+
+    // context menu
+    property Component contextMenu: Menu {
+        MenuItem {
+            text: "Fit"
+            onTriggered: fit()
+        }
+        MenuItem {
+            text: "Zoom 100%"
+            onTriggered: image.scale = 1
+        }
+    }
+
+    // placeholder, visible when image isn't ready
+    Rectangle {
+        anchors.centerIn: parent
+        width: Math.min(parent.width, parent.height*1.5) * 0.95 // 5% margin
+        height: Math.min(parent.height, parent.width*1.5) * 0.95 // 5% margin
+        color: "transparent"
+        border.color: "#333"
+        visible: image.status != Image.Ready
+    }
+
+    // image
+    Image {
+        id: image
+        transformOrigin: Item.TopLeft
+        asynchronous: true
+        smooth: false
+        fillMode: Image.PreserveAspectFit
+        autoTransform: true
+        onWidthChanged: if(status==Image.Ready) fit()
+    }
+
+    // busy indicator
+    BusyIndicator {
+        anchors.centerIn: parent
+        running: image.status === Image.Loading
+    }
+
+    // mouse area
+    MouseArea {
+        anchors.fill: parent
+        property double factor: 1.2
+        acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
+        onPressed: {
+            root.forceActiveFocus();
+            if(mouse.button & Qt.MiddleButton)
+                drag.target = image // start drag
+        }
+        onReleased: {
+            drag.target = undefined // stop drag
+            if(mouse.button & Qt.RightButton) {
+                var menu = contextMenu.createObject(root);
+                menu.x = mouse.x;
+                menu.y = mouse.y;
+                menu.open()
+            }
+        }
+        onWheel: {
+            var zoomFactor = wheel.angleDelta.y > 0 ? factor : 1/factor
+            if(Math.min(image.width*image.scale*zoomFactor, image.height*image.scale*zoomFactor) < 10)
+                return
+            var point = mapToItem(image, wheel.x, wheel.y)
+            image.x += (1-zoomFactor) * point.x * image.scale
+            image.y += (1-zoomFactor) * point.y * image.scale
+            image.scale *= zoomFactor
+        }
+    }
+
+    // zoom label
+    Label {
+        anchors.bottom: parent.bottom
+        anchors.left: parent.left
+        anchors.margins: 4
+        text: image.scale.toFixed(1) + "x"
+        state: "xsmall"
+    }
+}

meshroom/ui/qml/Viewer/qmldir

@@ -0,0 +1,3 @@
+module Viewer
+
+Viewer2D 1.0 Viewer2D.qml

meshroom/ui/qml/main.qml

@@ -1,5 +1,6 @@
 import QtQuick 2.7
 import QtQuick.Controls 2.3
+import QtQuick.Controls 1.4 as Controls1 // For SplitView
 import QtQuick.Layouts 1.1
 import QtQuick.Window 2.3
 import QtQml.Models 2.2
@@ -121,6 +122,31 @@ ApplicationWindow {
         return saved
     }
 
+    Dialog {
+        // Popup displayed while the application
+        // is busy building intrinsics while importing images
+        id: buildingIntrinsicsDialog
+        modal: true
+        x: _window.width / 2 - width/2
+        y: _window.height / 2 - height/2
+        visible: _reconstruction.buildingIntrinsics
+        closePolicy: Popup.NoAutoClose
+        title: "Import Images"
+        ColumnLayout {
+            anchors.fill: parent
+            Label {
+                text: "Extracting images metadata... "
+                horizontalAlignment: Text.AlignHCenter
+
+                Layout.fillWidth: true
+            }
+            ProgressBar {
+                indeterminate: true
+                Layout.fillWidth: true
+            }
+        }
+    }
+
     Action {
         id: undoAction
 
@@ -184,43 +210,77 @@ ApplicationWindow {
                 ToolTip.text: redoAction.tooltip
             }
         }
+        Menu {
+            title: "View"
+            Action {
+                text: "Fullscreen"
+                checkable: true
+                checked: _window.visibility == ApplicationWindow.FullScreen
+                shortcut: "Ctrl+F"
+                onTriggered: _window.visibility == ApplicationWindow.FullScreen ? _window.showNormal() : showFullScreen()
+            }
+        }
     }
 
-    ColumnLayout {
+
+    Controls1.SplitView {
         anchors.fill: parent
         anchors.margins: 4
-        Row {
-            spacing: 1
-            Layout.fillWidth: true
+        orientation: Qt.Vertical
 
-            Button {
-                text: "Execute"
-                enabled: _reconstruction.graph.nodes.count && !_reconstruction.computing
-                onClicked: _reconstruction.execute(null)
-            }
-            Button {
-                text: "Stop"
-                enabled: _reconstruction.computing
-                onClicked: _reconstruction.stopExecution()
-            }
-        }
-        GraphEditor {
-            id: graphEditor
-            graph: _reconstruction.graph
+        ImageGallery {
+            property variant node: _reconstruction.graph.nodes.get("CameraInit_1")
+            model: node ? node.attribute("viewpoints").value : undefined
             Layout.fillWidth: true
-            Layout.preferredHeight: parent.height * 0.3
-            Layout.margins: 10
+            implicitHeight: Math.round(parent.height * 0.5)
         }
 
-        Loader {
+        Controls1.SplitView {
             Layout.fillWidth: true
             Layout.fillHeight: true
-            active: graphEditor.selectedNode != null
-            sourceComponent: Component {
-                AttributeEditor {
-                    node: graphEditor.selectedNode
-                    // Disable editor when computing
-                    enabled: !_reconstruction.computing
+            orientation: Qt.Horizontal
+
+            ColumnLayout {
+                Layout.fillHeight: true
+                Layout.fillWidth: true
+                Layout.margins: 10
+                Row {
+                    spacing: 1
+                    Layout.fillWidth: true
+
+                    Button {
+                        text: "Execute"
+                        enabled: _reconstruction.graph.nodes.count && !_reconstruction.computing
+                        onClicked: _reconstruction.execute(null)
+                    }
+                    Button {
+                        text: "Stop"
+                        enabled: _reconstruction.computing
+                        onClicked: _reconstruction.stopExecution()
+                    }
+                }
+                GraphEditor {
+                    id: graphEditor
+                    graph: _reconstruction.graph
+                    Layout.fillHeight: true
+                    Layout.fillWidth: true
+                }
+            }
+            Item {
+                implicitHeight: Math.round(parent.height * 0.2)
+                implicitWidth: Math.round(parent.width * 0.3)
+
+                Loader {
+                    anchors.fill: parent
+                    anchors.margins: 10
+                    active: graphEditor.selectedNode != null
+                    sourceComponent: Component {
+                        AttributeEditor {
+                            node: graphEditor.selectedNode
+                            // Disable editor when computing
+                            enabled: !_reconstruction.computing
+                        }
+                    }
                 }
             }
         }