keyboard shortcuts.

the defaults are kinda lame right now, but I'm planning to do a lot more with this.
applet focus and the shorcut hooks work properly, however.

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=808610

applet.cpp

@@ -42,6 +42,7 @@
 #include <QDesktopWidget>
 #include <QGraphicsView>
 #include <QGraphicsProxyWidget>
+#include <QAction>
 
 #include <KIcon>
 #include <KColorScheme>
@@ -53,6 +54,7 @@
 #include <KService>
 #include <KServiceTypeTrader>
 #include <KWindowSystem>
+#include <KActionCollection>
 
 #include <Solid/PowerManagement>
 
@@ -650,6 +652,34 @@ void Applet::flushPendingConstraintsEvents()
     Plasma::Constraints c = d->pendingConstraints;
     d->pendingConstraints = NoConstraint;
 
+    if (c & Plasma::StartupCompletedConstraint) {
+        //common actions
+        bool unlocked = immutability() == Mutable;
+        //FIXME make it work for containments
+        //also, don't allow to delete the last desktop containment
+        //heck, can desktop ctmts even handle being deleted yet?
+        //so panel has a remove() that tears it down nicely. what does desktop have?
+        QAction* closeApplet = new QAction(i18n("Remove this %1", name()), this);
+        closeApplet->setIcon(KIcon("edit-delete"));
+        closeApplet->setEnabled(unlocked);
+        closeApplet->setVisible(unlocked);
+        closeApplet->setShortcutContext(Qt::WidgetWithChildrenShortcut); //don't clash with other views
+        if (! isContainment()) {
+            closeApplet->setShortcut(QKeySequence("ctrl+r"));
+            connect(closeApplet, SIGNAL(triggered(bool)), this, SLOT(destroy()));
+        }
+        d->actions.addAction("remove", closeApplet);
+    }
+
+    if (c & Plasma::ImmutableConstraint) {
+        bool unlocked = immutability() == Mutable;
+        QAction *action = d->actions.action("remove");
+        if (action) {
+            action->setVisible(unlocked);
+            action->setEnabled(unlocked);
+        }
+    }
+
     if (c & Plasma::SizeConstraint && d->needsConfigOverlay) {
         d->needsConfigOverlay->setGeometry(QRectF(QPointF(0, 0), boundingRect().size()));
         // FIXME:: rather horrible hack to work around the fact we don't have spacers
@@ -703,6 +733,16 @@ QList<QAction*> Applet::contextualActions()
     return d->script ? d->script->contextualActions() : QList<QAction*>();
 }
 
+QAction* Applet::action(QString name) const
+{
+    return d->actions.action(name);
+}
+
+void Applet::addAction(QString name, QAction *action)
+{
+    d->actions.addAction(name, action);
+}
+
 void Applet::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
 {
     QPainter *p;
@@ -821,6 +861,16 @@ Containment* Applet::containment() const
     return c;
 }
 
+void Applet::addAssociatedWidget(QWidget *widget)
+{
+    d->actions.addAssociatedWidget(widget);
+}
+
+void Applet::removeAssociatedWidget(QWidget *widget)
+{
+    d->actions.removeAssociatedWidget(widget);
+}
+
 Location Applet::location() const
 {
     Containment* c = containment();
@@ -886,7 +936,32 @@ bool Applet::hasConfigurationInterface() const
 
 void Applet::setHasConfigurationInterface(bool hasInterface)
 {
+    if (d->hasConfigurationInterface == hasInterface) {
+        return;
+    }
     d->hasConfigurationInterface = hasInterface;
+    //config action
+    //TODO respect security when it's implemented (4.2)
+    QAction *configAction = d->actions.action("configure");
+    if (hasInterface) {
+        if (! configAction) { //should be always true
+            configAction = new QAction(i18n("%1 Settings", name()), this);
+            configAction->setIcon(KIcon("configure"));
+            configAction->setShortcutContext(Qt::WidgetWithChildrenShortcut); //don't clash with other views
+            if (isContainment()) {
+                //kDebug() << "I am a containment";
+                configAction->setShortcut(QKeySequence("ctrl+shift+s"));
+            } else {
+                configAction->setShortcut(QKeySequence("ctrl+s"));
+            }
+            //TODO how can we handle configuration of the shortcut in a way that spans all applets?
+            connect(configAction, SIGNAL(triggered(bool)),
+                    this, SLOT(showConfigurationInterface()));
+            d->actions.addAction("configure", configAction);
+        }
+    } else {
+        d->actions.removeAction(configAction);
+    }
 }
 
 bool Applet::eventFilter( QObject *o, QEvent * e )
@@ -946,6 +1021,12 @@ void Applet::mousePressEvent(QGraphicsSceneMouseEvent *event)
 
 void Applet::focusInEvent(QFocusEvent * event)
 {
+    if (containment()) {
+        containment()->d->focusApplet(this);
+        //XXX if we are a containment we'll attempt to focus ourself
+        //which should be harmless
+        //focusing an applet may trigger this event again, but we won't be here more than twice
+    }
     QGraphicsWidget::focusInEvent(event);
 }
 
@@ -1145,6 +1226,7 @@ Applet* Applet::load(const KPluginInfo& info, uint appletId, const QVariantList&
 
 QVariant Applet::itemChange(GraphicsItemChange change, const QVariant &value)
 {
+    //kDebug() << change;
     switch (change) {
     case ItemPositionChange:
         if (d->shadow) {
@@ -1287,6 +1369,7 @@ Applet::Private::Private(KService::Ptr service, int uniqueID, Applet *applet)
           pendingConstraints(NoConstraint),
           aspectRatioMode(Plasma::KeepAspectRatio),
           immutability(Mutable),
+          actions(applet),
           constraintsTimerId(0),
           hasConfigurationInterface(false),
           failed(false),

applet.h

@@ -36,6 +36,7 @@
 
 class KConfigDialog;
 class QGraphicsView;
+class KActionCollection;
 
 namespace Plasma
 {
@@ -414,6 +415,16 @@ class PLASMA_EXPORT Applet : public QGraphicsWidget
          **/
         virtual QList<QAction*> contextualActions();
 
+        /**
+         * Returns the QAction with the given name from our collection
+         */
+        QAction* action(QString name) const;
+
+        /**
+         * Adds the action to our collection under the given name
+         */
+        void addAction(QString name, QAction *action);
+
         /**
          * @return BackgroundHints flags combination telling if the standard background is shown
          *         and if it has a drop shadow
@@ -448,6 +459,18 @@ class PLASMA_EXPORT Applet : public QGraphicsWidget
          **/
         Containment* containment() const;
 
+        /**
+         * associate actions with this widget, including ones added after this call.
+         * needed to make keyboard shortcuts work.
+         */
+        virtual void addAssociatedWidget(QWidget *widget);
+
+        /**
+         * un-associate actions from this widget, including ones added after this call.
+         * needed to make keyboard shortcuts work.
+         */
+        virtual void removeAssociatedWidget(QWidget *widget);
+
         /**
          * @param parent the QGraphicsItem this applet is parented to
          * @param serviceId the name of the .desktop file containing the

applet_p.h

@@ -22,6 +22,8 @@
 #ifndef PLASMA_APPLET_P_H
 #define PLASMA_APPLET_P_H
 
+#include <KActionCollection>
+
 namespace Plasma
 {
 
@@ -87,6 +89,7 @@ public:
     Plasma::AspectRatioMode aspectRatioMode;
     QGraphicsView* ghostView;
     ImmutabilityType immutability;
+    KActionCollection actions;
     int constraintsTimerId;
     bool hasConfigurationInterface : 1;
     bool failed : 1;

containment.cpp

@@ -116,6 +116,59 @@ void Containment::init()
         setContainmentType(DesktopContainment);
     }
 
+    //common actions
+    bool unlocked = immutability() == Mutable;
+
+    QAction *appletBrowserAction = new QAction(i18n("Add Widgets..."), this);
+    appletBrowserAction->setIcon(KIcon("list-add"));
+    appletBrowserAction->setVisible(unlocked);
+    appletBrowserAction->setEnabled(unlocked);
+    connect(appletBrowserAction, SIGNAL(triggered()), this, SLOT(triggerShowAddWidgets()));
+    appletBrowserAction->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+    appletBrowserAction->setShortcut(QKeySequence("ctrl+a"));
+    d->actions().addAction("add widgets", appletBrowserAction);
+
+    QAction *action = new QAction(i18n("Next Applet"), this);
+    //no icon
+    connect(action, SIGNAL(triggered()), this, SLOT(focusNextApplet()));
+    action->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+    action->setShortcut(QKeySequence("ctrl+n"));
+    d->actions().addAction("next applet", action);
+
+    action = new QAction(i18n("Previous Applet"), this);
+    //no icon
+    connect(action, SIGNAL(triggered()), this, SLOT(focusPreviousApplet()));
+    action->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+    action->setShortcut(QKeySequence("ctrl+p"));
+    d->actions().addAction("previous applet", action);
+
+    if (immutability() != SystemImmutable) {
+        //FIXME I'm not certain this belongs in Containment
+        //but it sure is nice to have the keyboard shortcut in every containment by default
+        QAction *lockDesktopAction = new QAction(unlocked ? i18n("Lock Widgets") : i18n("Unlock Widgets"), this);
+        lockDesktopAction->setIcon(KIcon("object-locked"));
+        connect(lockDesktopAction, SIGNAL(triggered(bool)), this, SLOT(toggleDesktopImmutability()));
+        lockDesktopAction->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+        lockDesktopAction->setShortcut(QKeySequence("ctrl+l"));
+        d->actions().addAction("lock widgets", lockDesktopAction);
+    }
+
+    if (d->type == DesktopContainment) { //this means custom containments are left out
+        QAction *zoomAction = new QAction(i18n("Zoom In"), this);
+        zoomAction->setIcon(KIcon("zoom-in"));
+        connect(zoomAction, SIGNAL(triggered(bool)), this, SLOT(zoomIn()));
+        zoomAction->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+        zoomAction->setShortcut(QKeySequence("ctrl+="));
+        d->actions().addAction("zoom in", zoomAction);
+
+        zoomAction = new QAction(i18n("Zoom Out"), this);
+        zoomAction->setIcon(KIcon("zoom-out"));
+        connect(zoomAction, SIGNAL(triggered(bool)), this, SLOT(zoomOut()));
+        zoomAction->setShortcutContext(Qt::WidgetWithChildrenShortcut);
+        zoomAction->setShortcut(QKeySequence("ctrl+-"));
+        d->actions().addAction("zoom out", zoomAction);
+    }
+
     Applet::init();
 }
 
@@ -276,12 +329,11 @@ void Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
         }
 
         if (applet->hasConfigurationInterface()) {
-            QAction* configureApplet = new QAction(i18n("%1 Settings", applet->name()), &desktopMenu);
+            QAction* configureApplet = applet->d->actions.action("configure");
-            configureApplet->setIcon(KIcon("configure"));
+            if (configureApplet) {
-            connect(configureApplet, SIGNAL(triggered(bool)),
+                desktopMenu.addAction(configureApplet);
-                    applet, SLOT(showConfigurationInterface()));
+                hasEntries = true;
-            desktopMenu.addAction(configureApplet);
+            }
-            hasEntries = true;
         }
 
         QList<QAction*> containmentActions = contextualActions();
@@ -302,14 +354,18 @@ void Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
             }
         }
 
-        if (scene() && !static_cast<Corona*>(scene())->immutability() != Mutable) {
+        if (scene() && static_cast<Corona*>(scene())->immutability() == Mutable) {
             if (hasEntries) {
                 desktopMenu.addSeparator();
             }
 
-            QAction* closeApplet = new QAction(i18n("Remove this %1", applet->name()), &desktopMenu);
+            QAction* closeApplet = applet->d->actions.action("remove");
-            closeApplet->setIcon(KIcon("edit-delete"));
+            if (! closeApplet) { //unlikely but not impossible
-            connect(closeApplet, SIGNAL(triggered(bool)), applet, SLOT(destroy()));
+                kDebug() << "wtf!! no remove action!!!!!!!!";
+                closeApplet = new QAction(i18n("Remove this %1", applet->name()), &desktopMenu);
+                closeApplet->setIcon(KIcon("edit-delete"));
+                connect(closeApplet, SIGNAL(triggered(bool)), applet, SLOT(destroy()));
+            }
             desktopMenu.addAction(closeApplet);
             hasEntries = true;
         }
@@ -716,6 +772,7 @@ bool Containment::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
 QVariant Containment::itemChange(GraphicsItemChange change, const QVariant &value)
 {
     Q_UNUSED(value)
+    //FIXME if the applet is moved to another containment we need to unfocus it
 
     if (isContainment() &&
         (change == QGraphicsItem::ItemSceneHasChanged || change == QGraphicsItem::ItemPositionHasChanged) &&
@@ -789,6 +846,84 @@ void Containment::closeToolBox()
     }
 }
 
+void Containment::addAssociatedWidget(QWidget *widget)
+{
+    Applet::addAssociatedWidget(widget);
+    if (d->focusedApplet) {
+        d->focusedApplet->addAssociatedWidget(widget);
+    }
+}
+
+void Containment::removeAssociatedWidget(QWidget *widget)
+{
+    Applet::removeAssociatedWidget(widget);
+    if (d->focusedApplet) {
+        d->focusedApplet->removeAssociatedWidget(widget);
+    }
+}
+
+KActionCollection& Containment::Private::actions()
+{
+    return static_cast<Applet*>(q)->d->actions;
+}
+
+void Containment::Private::focusApplet(Plasma::Applet *applet)
+{
+    kDebug();
+    if (focusedApplet == applet) {
+        return;
+    }
+
+    QList<QWidget *> widgets = actions().associatedWidgets();
+    if (focusedApplet) {
+        foreach (QWidget *w, widgets) {
+            focusedApplet->removeAssociatedWidget(w);
+        }
+    }
+    //but what if applet isn't really one of our applets?
+    //FIXME should we really unfocus the old applet?
+    if (applets.contains(applet)) {
+        kDebug() << "switching to" << applet->name();
+        focusedApplet = applet;
+        if (focusedApplet) {
+            foreach (QWidget *w, widgets) {
+                focusedApplet->addAssociatedWidget(w);
+            }
+        }
+        applet->setFocus(Qt::ShortcutFocusReason);
+    } else {
+        focusedApplet = 0;
+    }
+}
+
+void Containment::focusNextApplet()
+{
+    kDebug();
+    if (d->applets.isEmpty()) {
+        return;
+    }
+    int index = d->focusedApplet ? d->applets.indexOf(d->focusedApplet) + 1 : 0;
+    if (index >= d->applets.size()) {
+        index = 0;
+    }
+    kDebug() << "index" << index;
+    d->focusApplet(d->applets.at(index));
+}
+
+void Containment::focusPreviousApplet()
+{
+    kDebug();
+    if (d->applets.isEmpty()) {
+        return;
+    }
+    int index = d->focusedApplet ? d->applets.indexOf(d->focusedApplet) - 1 : -1;
+    if (index < 0) {
+        index = d->applets.size() - 1;
+    }
+    kDebug() << "index" << index;
+    d->focusApplet(d->applets.at(index));
+}
+
 
 // Private class implementation
 
@@ -808,7 +943,7 @@ void Containment::Private::toggleDesktopImmutability()
         }
     }
 
-    setLockToolText();
+    //setLockToolText();
 }
 
 void Containment::Private::zoomIn()
@@ -896,6 +1031,17 @@ void Containment::Private::containmentConstraintsEvent(Plasma::Constraints const
     //kDebug() << "got containmentConstraintsEvent" << constraints << (QObject*)toolBox;
     if (constraints & Plasma::ImmutableConstraint) {
         setLockToolText();
+        //update actions
+        bool unlocked = q->immutability() == Mutable;
+        QAction *action = actions().action("add widgets");
+        if (action) {
+            action->setVisible(unlocked);
+            action->setEnabled(unlocked);
+        }
+        action = actions().action("lock widgets");
+        if (action) {
+            action->setText(unlocked ? i18n("Lock Widgets") : i18n("Unlock Widgets"));
+        }
 
         // tell the applets too
         foreach (Applet *a, applets) {
@@ -1001,6 +1147,9 @@ void Containment::Private::appletDestroyed(QObject* object)
     // so this unsafe looking code is actually just fine.
     Applet* applet = static_cast<Plasma::Applet*>(object);
     applets.removeAll(applet);
+    if (focusedApplet == applet) {
+        focusedApplet = 0;
+    }
     emit q->appletRemoved(applet);
     emit q->configNeedsSaving();
 }

containment.h

@@ -260,6 +260,18 @@ class PLASMA_EXPORT Containment : public Applet
          */
         void closeToolBox();
 
+        /**
+         * associate actions with this widget, including ones added after this call.
+         * needed to make keyboard shortcuts work.
+         */
+        void addAssociatedWidget(QWidget *widget);
+
+        /**
+         * un-associate actions from this widget, including ones added after this call.
+         * needed to make keyboard shortcuts work.
+         */
+        void removeAssociatedWidget(QWidget *widget);
+
     Q_SIGNALS:
         /**
          * This signal is emitted when a new applet is created by the containment
@@ -328,6 +340,16 @@ class PLASMA_EXPORT Containment : public Applet
          */
         void addSiblingContainment();
 
+        /**
+         * switch keyboard focus to the next of our applets
+         */
+        void focusNextApplet();
+
+        /**
+         * switch keyboard focus to the previous one of our applets
+         */
+        void focusPreviousApplet();
+
     protected:
         /**
          * Sets the type of this containment.

containment_p.h

@@ -37,6 +37,7 @@ public:
         : q(c),
           formFactor(Planar),
           location(Floating),
+          focusedApplet(0),
           screen(-1), // no screen
           toolBox(0),
           type(Containment::NoContainmentType),
@@ -82,10 +83,18 @@ public:
                       const QRectF &geometry = QRectF(-1, -1, -1, -1), uint id = 0,
                       bool delayedInit = false);
 
+    KActionCollection& actions();
+
+    /**
+     * give keyboard focus to applet within this containment
+     */
+    void focusApplet(Plasma::Applet *applet);
+
     Containment *q;
     FormFactor formFactor;
     Location location;
     Applet::List applets;
+    Applet *focusedApplet;
     QMap<Applet*, AppletHandle*> handles;
     int screen;
     Toolbox *toolBox;

view.cpp

@@ -21,6 +21,7 @@
 
 #include <KGlobal>
 #include <KWindowSystem>
+#include <KActionCollection>
 
 #include "corona.h"
 #include "containment.h"
@@ -175,13 +176,18 @@ void View::setContainment(Containment *containment)
     if (d->containment) {
         disconnect(d->containment, SIGNAL(geometryChanged()), this, SLOT(updateSceneRect()));
         screen = d->containment->screen();
+        //remove all the old containment's actions
+        d->containment->removeAssociatedWidget(this);
     }
 
     d->containment = containment;
     if (! containment) {
         return;
     }
-    
+
+    //add keyboard-shortcut actions
+    d->containment->addAssociatedWidget(this);
+
     if (screen > -1) {
         containment->setScreen(screen);
     }