ui experiment: keep all windows minimized

keep all windows minimized except the active one and minimize everything
when the task manager is open

containments/taskpanel/CMakeLists.txt

@@ -11,6 +11,7 @@ target_link_libraries(plasma_containment_phone_taskpanel
                       Qt5::DBus
                       KF5::Plasma
                       Qt5::Qml
+                      Qt5::Quick
                       KF5::I18n
                       KF5::Service
                       KF5::WaylandClient

containments/taskpanel/package/contents/ui/Task.qml

@@ -28,6 +28,23 @@ Item {
     id: delegate
     width: window.width/2
     height: window.height/2
+
+    //Workaround
+    property bool active: model.IsActive
+    onActiveChanged: {
+        if (model.IsActive) {
+            window.currentTaskIndex = index
+        }
+    }
+
+    Connections {
+        target: tasksView
+        onContentYChanged: {
+            var pos = delegate.mapToItem(tasksView, 0, 0);
+            plasmoid.nativeInterface.setTaskGeometry(filteredWindowModel.mapRowToSource(model.index), pos.x, pos.y, delegate.width, delegate.height);
+        }
+    }
+
     Item {
         anchors {
             fill: parent

containments/taskpanel/package/contents/ui/TaskSwitcher.qml

@@ -33,6 +33,7 @@ FullScreenPanel {
     property int offset: 0
     property int overShoot: units.gridUnit * 2
     property int tasksCount: filteredWindowModel.count
+    property int currentTaskIndex: -1
 
     color: Qt.rgba(0, 0, 0, 0.6 * Math.min(
         (Math.min(tasksView.contentY + tasksView.height, tasksView.height) / tasksView.height),
@@ -49,6 +50,7 @@ FullScreenPanel {
         scrollAnim.from = tasksView.contentY;
         scrollAnim.to = 0;
         scrollAnim.running = true;
+        setSingleActiveWindow(-1);
     }
     function hide() {
         scrollAnim.from = tasksView.contentY;
@@ -60,6 +62,24 @@ FullScreenPanel {
         scrollAnim.running = true;
     }
 
+    function setSingleActiveWindow(id) {
+        var task;
+        for (var i = 0; i < filteredWindowModel.count; ++i) {
+            task = filteredWindowModel.get(i);
+
+            if (i == id && task.IsMinimized) {
+                plasmoid.nativeInterface.windowModel.requestToggleMinimized(filteredWindowModel.mapRowToSource(i));
+            } else if (i != id && !task.IsMinimized) {
+                plasmoid.nativeInterface.windowModel.requestToggleMinimized(filteredWindowModel.mapRowToSource(i));
+            } 
+        }
+        return;
+        if (id >= 0) {
+            plasmoid.nativeInterface.windowModel.requestActivate(filteredWindowModel.mapRowToSource(id));
+        }
+        currentTaskIndex = id;
+    }
+
     onOffsetChanged: tasksView.contentY = offset
 
     SequentialAnimation {
@@ -84,6 +104,7 @@ FullScreenPanel {
             }
         }
     }
+
     GridView {
         id: tasksView
         width: window.width
@@ -163,4 +184,27 @@ FullScreenPanel {
             }
         }
     }
+
+    Rectangle {
+        color: theme.textColor
+        anchors {
+            fill: showDesktopButton
+            margins: -showDesktopButton.width/4
+        }
+        radius: width
+    }
+    Button {
+        id: showDesktopButton
+        height: units.iconSizes.medium
+        width: height
+        anchors {
+            horizontalCenter: parent.horizontalCenter
+            bottom: parent.bottom
+        }
+        iconSource: "go-home"
+        onClicked: {
+            window.hide();
+        }
+    }
+    Component.onCompleted: plasmoid.nativeInterface.panel = window;
 }

containments/taskpanel/package/contents/ui/main.qml

@@ -58,6 +58,7 @@ PlasmaCore.ColorScope {
             if (taskSwitcher.visibility == Window.Hidden && taskSwitcher.offset > -taskSwitcher.height + units.gridUnit && taskSwitcher.tasksCount) {
                 taskSwitcher.visible = true;
             }
+            taskSwitcher.setSingleActiveWindow(-1);
         }
         onReleased: {
             if (taskSwitcher.visibility == Window.Hidden) {
@@ -67,6 +68,7 @@ PlasmaCore.ColorScope {
                 taskSwitcher.show();
             } else {
                 taskSwitcher.hide();
+                taskSwitcher.setSingleActiveWindow(taskSwitcher.currentTaskIndex);
             }
         }
 
@@ -95,13 +97,17 @@ PlasmaCore.ColorScope {
                 anchors.horizontalCenter: parent.horizontalCenter
                 iconSource: "go-home"
                 checkable: true
-                onCheckedChanged: {print (checked)
-                    plasmoid.nativeInterface.showDesktop = checked;
+                onCheckedChanged: {
+                    if (checked) {
+                        root.taskSwitcher.setSingleActiveWindow(-1);
+                    } else {
+                        root.taskSwitcher.setSingleActiveWindow(Math.max(0, root.taskSwitcher.currentTaskIndex));
+                    }
                 }
                 Connections {
-                    target: plasmoid.nativeInterface
-                    onShowingDesktopChanged: {
-                        showDesktopButton.checked = plasmoid.nativeInterface.showDesktop;
+                    target: root.taskSwitcher
+                    onCurrentTaskIndexChanged: {
+                        showDesktopButton.checked = root.taskSwitcher.currentTaskIndex >= 0
                     }
                 }
             }

containments/taskpanel/taskpanel.cpp

@@ -21,13 +21,17 @@
 
 #include <QtQml>
 #include <QDebug>
+#include <QQuickItem>
+#include <QQuickWindow>
 
 #include <Plasma/Package>
 
 #include <KWayland/Client/connection_thread.h>
 #include <KWayland/Client/plasmawindowmanagement.h>
 #include <KWayland/Client/plasmawindowmodel.h>
+#include <KWayland/Client/plasmashell.h>
 #include <KWayland/Client/registry.h>
+#include <KWayland/Client/surface.h>
 
 static const QString s_kwinService = QStringLiteral("org.kde.KWin");
 
@@ -88,6 +92,21 @@ void TaskPanel::initWayland()
             });
         }
     );
+    connect(registry, &Registry::plasmaShellAnnounced, this,
+        [this, registry] (quint32 name, quint32 version) {
+            
+            m_shellInterface = registry->createPlasmaShell(name, version, this);
+
+            if (!m_panel) {
+                return;
+            }
+            Surface *s = Surface::fromWindow(m_panel);
+            if (!s) {
+                return;
+            }
+            m_shellSurface = m_shellInterface->createSurface(s, this);
+        }
+    );
     registry->setup();
 }
 
@@ -96,6 +115,32 @@ QAbstractItemModel *TaskPanel::windowModel() const
     return m_windowModel;
 }
 
+QWindow *TaskPanel::panel()
+{
+    return m_panel;
+}
+
+void TaskPanel::setPanel(QWindow *panel)
+{
+    using namespace KWayland::Client;
+    if (panel == m_panel) {
+        return;
+    }
+
+    m_panel = panel;
+    emit panelChanged();
+
+    if (!m_shellSurface) {
+        return;
+    }
+    Surface *s = Surface::fromWindow(panel);
+    if (!s) {
+        return;
+    }
+    
+    m_shellSurface = m_shellInterface->createSurface(s, this);
+}
+
 void TaskPanel::updateActiveWindow()
 {
     if (!m_windowManagement) {
@@ -118,6 +163,23 @@ void TaskPanel::closeActiveWindow()
     }
 }
 
+void TaskPanel::setTaskGeometry(int row, int x, int y, int width, int height)
+{
+    using namespace KWayland::Client;
+    if (!m_shellSurface) {
+        if (!m_shellInterface || !m_panel || !m_panel->isVisible()) {
+            return;
+        }
+        m_surface = Surface::fromWindow(m_panel);
+        if (!m_surface) {
+            return;
+        }
+        m_shellSurface = m_shellInterface->createSurface(m_surface, this);
+    }
+
+    m_windowModel->setMinimizedGeometry(row, m_surface, QRect(x, y, width, height));
+}
+
 K_EXPORT_PLASMA_APPLET_WITH_JSON(taskpanel, TaskPanel, "metadata.json")
 
 #include "taskpanel.moc"

containments/taskpanel/taskpanel.h

@@ -32,6 +32,9 @@ namespace Client
 class PlasmaWindowManagement;
 class PlasmaWindow;
 class PlasmaWindowModel;
+class PlasmaShell;
+class PlasmaShellSurface;
+class Surface;
 }
 }
 
@@ -41,6 +44,7 @@ class TaskPanel : public Plasma::Containment
     Q_PROPERTY(QAbstractItemModel* windowModel READ windowModel NOTIFY windowModelChanged)
     Q_PROPERTY(bool showDesktop READ isShowingDesktop WRITE requestShowingDesktop NOTIFY showingDesktopChanged)
     Q_PROPERTY(bool hasCloseableActiveWindow READ hasCloseableActiveWindow NOTIFY hasCloseableActiveWindowChanged)
+    Q_PROPERTY(QWindow *panel READ panel WRITE setPanel NOTIFY panelChanged)
 
 public:
     TaskPanel( QObject *parent, const QVariantList &args );
@@ -48,6 +52,9 @@ public:
 
     QAbstractItemModel *windowModel() const;
 
+    QWindow *panel();
+    void setPanel(QWindow *panel);
+
     Q_INVOKABLE void closeActiveWindow();
 
     bool isShowingDesktop() const {
@@ -57,16 +64,23 @@ public:
 
     bool hasCloseableActiveWindow() const;
 
+    Q_INVOKABLE void setTaskGeometry(int row, int x, int y, int width, int height);
+
 Q_SIGNALS:
     void windowModelChanged();
     void showingDesktopChanged(bool);
     void hasCloseableActiveWindowChanged();
+    void panelChanged();
 
 private:
     void initWayland();
     void updateActiveWindow();
     bool m_showingDesktop;
-    KWayland::Client::PlasmaWindowManagement *m_windowManagement;
+    QWindow *m_panel = nullptr;
+    KWayland::Client::PlasmaShellSurface *m_shellSurface = nullptr;
+    KWayland::Client::Surface *m_surface = nullptr;
+    KWayland::Client::PlasmaShell *m_shellInterface = nullptr;
+    KWayland::Client::PlasmaWindowManagement *m_windowManagement = nullptr;
     KWayland::Client::PlasmaWindowModel *m_windowModel = nullptr;
     KWayland::Client::PlasmaWindow *m_activeWindow = nullptr;
 };