toppanel/notifications: add clean all and do not disturb

Hi, this MR adds "clear all" and "do not disturb" buttons to `NotificationsWidget`.

Few other corrections have been made:
 - Transitions should now work correctly, plus they can be disabled via `MobileShell.MobileShellSettings.animationsEnabled`;
 - Loaders are now asynchronous;
 - List items have now their own margins, in order to not clip their shadows.\

It only remains to implement a context menu to set do not disturb mode for a given period of time. I think it's a secondary feature on which we can work later, but in case tell me what to do.

Unfortunately I can't test the lockscreen on a phone at the moment, and I cannot take a performance test as well. It would be great if someone tested all these things, otherwise I'll provide as soon as possible.

Closes: https://invent.kde.org/plasma/plasma-mobile/-/issues/134

components/mobileshell/qml/actiondrawer/LandscapeContentContainer.qml

@@ -71,6 +71,7 @@ PlasmaCore.ColorScope {
                 top: mediaWidget.bottom
                 topMargin: 0
                 bottom: parent.bottom
+                bottomMargin: 0
                 right: quickSettings.left
                 left: parent.left
             }

components/mobileshell/qml/actiondrawer/PortraitContentContainer.qml

@@ -43,7 +43,7 @@ PlasmaCore.ColorScope {
         color: Qt.rgba(PlasmaCore.Theme.backgroundColor.r, 
                        PlasmaCore.Theme.backgroundColor.g, 
                        PlasmaCore.Theme.backgroundColor.b, 
-                       notificationWidget.hasNotifications ? 0.95 : 0.7)
+                       0.95)
         Behavior on color { ColorAnimation { duration: PlasmaCore.Units.longDuration } }
         opacity: Math.max(0, Math.min(1, actionDrawer.offset / root.minimizedQuickSettingsOffset))
     }
@@ -114,11 +114,8 @@ PlasmaCore.ColorScope {
             top: quickSettings.top
             topMargin: quickSettings.height + translate.y
             bottom: parent.bottom
-            bottomMargin: PlasmaCore.Units.largeSpacing
             left: parent.left
-            leftMargin: PlasmaCore.Units.largeSpacing
             right: parent.right
-            rightMargin: PlasmaCore.Units.largeSpacing
         }
         opacity: applyMinMax(root.actionDrawer.offset / root.minimizedQuickSettingsOffset)
     }

components/mobileshell/qml/widgets/notifications/NotificationsWidget.qml

@@ -6,7 +6,7 @@
  */
 
 import QtQuick 2.15
-import QtQuick.Layouts 1.1
+import QtQuick.Layouts 1.15
 import QtQuick.Window 2.2
 import QtGraphicalEffects 1.12
 
@@ -29,17 +29,17 @@ Item {
     /**
      * The notification model for the widget.
      */
-    property var historyModel: []
+    property var historyModel
     
     /**
      * The type of notification model used for the widget.
      */
-    property int historyModelType: NotificationsModelType.NotificationsModel
+    property int historyModelType
     
     /**
      * The notification model settings for the widget.
      */
-    property var notificationSettings: NotificationManager.Settings {}
+    property var notificationSettings
     
     /**
      * Whether invoking notification actions requires authentiation of some sort.
@@ -55,6 +55,8 @@ Item {
      */
     readonly property bool hasNotifications: list.count > 0
     
+    readonly property bool doNotDisturbModeEnabled: !isNaN(notificationSettings.notificationsInhibitedUntil)
+    
     enum ModelType {
         NotificationsModel, // used in the logged-in shell
         WatchedNotificationsModel // used on the lockscreen
@@ -85,6 +87,27 @@ Item {
      */
     function clearHistory() {
         historyModel.clear(NotificationManager.Notifications.ClearExpired);
+        
+        if (historyModel.count === 0) {
+            backgroundClicked();
+        }
+    }
+
+    /**
+     * Toggles Do Not Disturb mode.
+     */
+    function toggleDoNotDisturbMode() {
+        if (doNotDisturbModeEnabled) {
+            notificationSettings.defaults();
+        } else {
+            var until = new Date();
+            
+            until.setFullYear(until.getFullYear() + 1);
+            
+            notificationSettings.notificationsInhibitedUntil = until;
+        }
+        
+        notificationSettings.save();
     }
     
     /**
@@ -102,35 +125,51 @@ Item {
         intervalAlignment: PlasmaCore.Types.AlignToMinute
     }
     
+    // implement background clicking signal
+    MouseArea {
+        anchors.fill: parent
+        onClicked: backgroundClicked()
+        z: -1 // ensure that this is below notification items so we don't steal button clicks
+    }
+
     ListView {
         id: list
         model: historyModel
-        currentIndex: -1
+        
+        clip: true
+        
+        currentIndex: 0
         
         property var pendingNotificationWithAction
 
+        readonly property int animationDuration: MobileShell.MobileShellSettings.animationsEnabled ? PlasmaCore.Units.longDuration : 0
+        
+        // If a screen overflow occurs, fix height in order to maintain tool buttons in place.
+        readonly property bool listOverflowing: contentItem.childrenRect.height + toolButtons.height + bottomMargin + spacing >= root.height
+        
+        bottomMargin: spacing * 2
+        
+        height: count === 0 ? 0 : listOverflowing ? root.height - toolButtons.height - bottomMargin : contentItem.childrenRect.height + spacing
+        
+        anchors {
+            top: parent.top
+            left: parent.left
+            right: parent.right
+        }
+                
         boundsBehavior: Flickable.StopAtBounds
         spacing: Kirigami.Units.largeSpacing
 
-        anchors.fill: parent
-
         // TODO keyboard focus
         highlightMoveDuration: 0
         highlightResizeDuration: 0
         highlight: Item {} 
 
         section {
-            property: "isInGroup"
+            property: "isGroup"
             criteria: ViewSection.FullString
         }
         
-        // implement background clicking signal
-        MouseArea {
-            anchors.fill: parent
-            onClicked: root.backgroundClicked()
-            z: -1 // ensure that this is below notification items so we don't steal button clicks
-        }
-        
         PlasmaExtras.PlaceholderMessage {
             anchors.centerIn: parent
             width: parent.width - (PlasmaCore.Units.largeSpacing * 4)
@@ -149,24 +188,13 @@ Item {
             }
         }
         
+        // Run every time an item is visually added to the list, thus when `Show n more` button is clicked as well.
         add: Transition {
-            SequentialAnimation {
+            NumberAnimation { property: "opacity"; from: 0; to: 1; duration: list.animationDuration }
-                PropertyAction { property: "opacity"; value: 0 }
-                PauseAnimation { duration: PlasmaCore.Units.longDuration }
-                ParallelAnimation {
-                    NumberAnimation { property: "opacity"; from: 0; to: 1; duration: PlasmaCore.Units.longDuration }
-                    NumberAnimation { property: "height"; from: 0; duration: PlasmaCore.Units.longDuration }
-                }
-            }
-        }
-        addDisplaced: Transition {
-            NumberAnimation { properties: "y"; duration:  PlasmaCore.Units.longDuration }
-        }
-        removeDisplaced: Transition {
-            SequentialAnimation {
-                PauseAnimation { duration: PlasmaCore.Units.longDuration }
-                NumberAnimation { properties: "y"; duration:  PlasmaCore.Units.longDuration }
         }
+        // Run every time an item is displaced, such as when the order is scrambled due to a group expansion.
+        displaced: Transition {
+            NumberAnimation { properties: "y"; duration: list.animationDuration }
         }
         
         function isRowExpanded(row) {
@@ -191,16 +219,35 @@ Item {
                     }
                 }
             }
+            
+            // Instantly re-align items after group expansion.
+            forceLayout();
         }
         
         delegate: Loader {
             id: delegateLoader
-            width: list.width
+            
+            anchors {
+                left: parent ? parent.left : undefined
+                leftMargin: PlasmaCore.Units.largeSpacing
+                right: parent ? parent.right : undefined
+                rightMargin: PlasmaCore.Units.largeSpacing
+            }
+            
+            height: model.isGroup ? groupDelegate.height : notificationDelegate.height
             sourceComponent: model.isGroup ? groupDelegate : notificationDelegate
+            asynchronous: true
             
             required property var model
             required property int index
             
+            // We have to do this here in order to control the animation before the item is completely removed
+            ListView.onRemove: SequentialAnimation {
+                PropertyAction { target: delegateLoader; property: "ListView.delayRemove"; value: true }
+                NumberAnimation { target: delegateLoader; property: "opacity"; to: 0.0; duration: list.animationDuration }
+                PropertyAction { target: delegateLoader; property: "ListView.delayRemove"; value: false }
+            }
+            
             Component {
                 id: groupDelegate
                 NotificationGroupHeader {                    
@@ -213,12 +260,16 @@ Item {
             
             Component {
                 id: notificationDelegate
-                ColumnLayout {
+                
+                Column {
                     spacing: PlasmaCore.Units.smallSpacing
                     
+                    height: notificationItem.height + showMoreLoader.height
+                    
                     NotificationItem {
                         id: notificationItem
-                        Layout.fillWidth: true
+                        width: parent.width
+                        height: implicitHeight
                         
                         model: delegateLoader.model
                         modelIndex: delegateLoader.index
@@ -233,16 +284,37 @@ Item {
                         }
                     }
                     
+                    // Every item has got an instance of this loader, but it becomes active only for last ones that take place in big enough groups.
                     Loader {
+                        id: showMoreLoader
+                        
                         height: visible ? implicitHeight : 0
+                        opacity: 0.0
                         visible: active
+                        
+                        asynchronous: true
+                        
                         active: {
                             // if we have the WatchedNotificationsModel, we don't have notification grouping support
                             if (typeof model.groupChildrenCount === 'undefined')
                                 return false;
                                                         
                             return (model.groupChildrenCount > model.expandedGroupChildrenCount || model.isGroupExpanded)
-                                    && delegateLoader.ListView.nextSection !== delegateLoader.ListView.section
+                                && delegateLoader.ListView.nextSection != delegateLoader.ListView.section;
+                        }
+                        
+                        // state + transition: animates the item when it becomes visible. Fade off is handled by above ListView.onRemove.
+                        states: State {
+                            name: "VISIBLE"
+                            when: showMoreLoader.status == Loader.Ready
+                            PropertyChanges { target: showMoreLoader; opacity: 1.0 }
+                        }
+                        transitions: Transition {
+                            to: "VISIBLE"
+                            SequentialAnimation {
+                                PauseAnimation { duration: list.animationDuration * 2 }
+                                NumberAnimation { properties: "opacity"; duration: list.animationDuration }
+                            }
                         }
                         
                         sourceComponent: PlasmaComponents3.ToolButton {
@@ -250,11 +322,86 @@ Item {
                             text: model.isGroupExpanded ? i18n("Show Fewer")
                                                         : i18nc("Expand to show n more notifications",
                                                                 "Show %1 More", (model.groupChildrenCount - model.expandedGroupChildrenCount))
-                            onClicked: list.setGroupExpanded(model.index, !model.isGroupExpanded)
+                            onClicked: {
+                                list.setGroupExpanded(model.index, !model.isGroupExpanded)
                             }
                         }
                     }
                 }
             }
         }
+    }
+    
+    Item {
+        id: toolButtons
+        
+        visible: !root.actionsRequireUnlock
+        
+        width: root.width
+        height: toolLayout.implicitHeight + spacer.height
+        
+        anchors {
+            top: list.bottom
+            left: parent.left
+            right: parent.right
+        }
+        
+        Rectangle {
+            id: spacer
+            
+            visible: list.listOverflowing
+                                
+            anchors {
+                top: toolButtons.top
+                left: toolButtons.left
+                right: toolButtons.right
+            }
+            
+            height: 1
+            
+            opacity: 0.25
+            color: PlasmaCore.Theme.textColor
+        }
+        
+        RowLayout {
+            id: toolLayout
+            
+            anchors {
+                top: spacer.bottom
+                topMargin: list.spacing
+                left: parent.left
+                leftMargin: PlasmaCore.Units.smallSpacing
+                right: parent.right
+                rightMargin: PlasmaCore.Units.smallSpacing
+                bottom: parent.bottom
+                bottomMargin: list.spacing
+            }
+            
+            PlasmaComponents3.ToolButton {
+                id: doNotDisturbButton
+                
+                Layout.alignment: hasNotifications ? Qt.AlignLeft : Qt.AlignHCenter
+                
+                font.bold: true
+                
+                icon.name: doNotDisturbModeEnabled ? "notifications" : "notifications-disabled"
+                text: doNotDisturbModeEnabled ? "Enable Notifications" : "Do Not Disturb"
+                onClicked: toggleDoNotDisturbMode()
+            }
+            
+            PlasmaComponents3.ToolButton {
+                id: clearButton
+                
+                Layout.alignment: Qt.AlignRight
+                
+                visible: hasNotifications
+                
+                font.bold: true
+                
+                icon.name: "edit-clear-history"
+                text: "Clear All Notifications"
+                onClicked: clearHistory()
+            }
+        }
+    }
 }

look-and-feel/contents/lockscreen/NotificationsComponent.qml

@@ -13,10 +13,13 @@ import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.notificationmanager 1.1 as Notifications
 import org.kde.plasma.private.mobileshell 1.0 as MobileShell
 
+import org.kde.notificationmanager 1.0 as NotificationManager
+
 Rectangle {
     id: root
     required property var lockScreenState
     property var notificationsModel: []
+    property var notificationSettings: NotificationManager.Settings {}
     
     readonly property bool notificationsShown: notificationsList.hasNotifications
     
@@ -61,6 +64,7 @@ Rectangle {
             historyModelType: MobileShell.NotificationsModelType.WatchedNotificationsModel
             actionsRequireUnlock: true
             historyModel: root.notificationsModel
+            notificationSettings: root.notificationSettings
         
             property bool requestNotificationAction: false