[Panorama Viewer] add Panorama Viewer toolbar

Add two icons in material icons
Update icon of viewer
Add downscale value as spinbox
Add 3 buttons for options in viewer

meshroom/ui/qml/MaterialIcons/MaterialIcons.qml

@@ -660,6 +660,8 @@ QtObject {
     readonly property string panorama_fish_eye: "\ue40c"
     readonly property string panorama_horizontal: "\ue40d"
     readonly property string panorama_vertical: "\ue40e"
+    readonly property string panorama_sphere: "\ue9c9"
+    readonly property string panorama_sphere_filled: "\ue9ca"
     readonly property string panorama_wide_angle: "\ue40f"
     readonly property string party_mode: "\ue7fa"
     readonly property string pause: "\ue034"

meshroom/ui/qml/Viewer/PanoramaToolbar.qml

@@ -0,0 +1,105 @@
+import QtQuick 2.11
+import QtQuick.Controls 2.0
+import QtQuick.Layouts 1.3
+import MaterialIcons 2.2
+import Controls 1.0
+import Utils 1.0
+
+FloatingPane {
+    id: root
+    anchors.margins: 0
+    padding: 5
+    radius: 0
+
+    property bool enableEdit: enablePanoramaEdit.checked
+    property bool enableHover: enableHover.checked
+
+    property int downscaleDefaultValue: 2
+
+    background: Rectangle { color: root.palette.window }
+
+    DoubleValidator {
+        id: doubleValidator
+        locale: 'C' // use '.' decimal separator disregarding of the system locale
+    }
+
+    RowLayout {
+        id: toolLayout
+        anchors.fill: parent
+
+        MaterialToolButton {
+            id: enablePanoramaEdit
+            ToolTip.text: "Enable Panorama edition"
+            text: MaterialIcons.open_with
+            font.pointSize: 14
+            padding: 5
+            Layout.minimumWidth: 0
+            checkable: true
+            checked: true
+        }
+        MaterialToolButton {
+            id: enableHover
+            ToolTip.text: "Enable hovering highlight"
+            text: MaterialIcons.highlight
+            font.pointSize: 14
+            padding: 5
+            Layout.minimumWidth: 0
+            checkable: true
+            checked: true
+        }
+        MaterialToolButton {
+            id: displayGrid
+            ToolTip.text: "Display grid"
+            text: MaterialIcons.grid_on
+            font.pointSize: 14
+            padding: 5
+            Layout.minimumWidth: 0
+            checkable: true
+            checked: true
+        }
+        //Fill rectangle to have a better UI
+        Rectangle {
+            color: root.palette.window
+            Layout.fillWidth: true
+        }
+        RowLayout{
+            ToolButton {
+                text: "Downscale"
+
+                ToolTip.visible: ToolTip.text && hovered
+                ToolTip.delay: 100
+                ToolTip.text: "Reset the downscale"
+
+                onClicked: {
+                    downscaleSpinBox.value = downscaleDefaultValue;
+                }
+            }
+            SpinBox {
+                id: downscaleSpinBox
+                from: 0
+                value: 2
+                to: 3
+                stepSize: 1
+                Layout.fillWidth: false
+
+
+                validator: DoubleValidator {
+                    bottom: Math.min(downscaleSpinBox.from, downscaleSpinBox.to)
+                    top:  Math.max(downscaleSpinBox.from, downscaleSpinBox.to)
+                }
+
+                textFromValue: function(value, locale) {
+                    if(value === 0){
+                        return 1
+                    }
+                    else{
+                        return "1/" + Math.pow(2,value).toString()
+                    }
+
+                }
+            }
+        }
+
+    }
+
+}

meshroom/ui/qml/Viewer/Viewer2D.qml

@@ -186,6 +186,13 @@ FocusScope {
             Layout.fillWidth: true
         }
 
+        PanoramaToolbar {
+            id: panoramaViewerToolbar
+            anchors.margins: 0
+            visible: displayPanoramaToolBarAction.checked && displayPanoramaToolBarAction.enabled
+            Layout.fillWidth: true
+        }
+
         // Image
         Item {
             id: imgLayout
@@ -700,7 +707,7 @@ FocusScope {
                             property bool isComputed: activeNode && activeNode.isComputed
 
                             ToolTip.text: "Panorama Viewer"
-                            text: MaterialIcons.panorama_wide_angle
+                            text: MaterialIcons.panorama_sphere
                             font.pointSize: 16
                             padding: 0
                             Layout.minimumWidth: 0

meshroom/ui/qml/WorkspaceView.qml

@@ -112,6 +112,13 @@ Item {
                             checked: true
                             enabled: viewer2D.useLensDistortionViewer
                         }
+                        Action {
+                            id: displayPanoramaToolBarAction
+                            text: "Display Panorama Toolbar"
+                            checkable: true
+                            checked: true
+                            enabled: viewer2D.usePanoramaViewer
+                        }
                         Action {
                             id: displayImagePathAction
                             text: "Display Image Path"