Debugger: Remove some uses of semi-global currentEngine()

Make use of recent TreeModel improvements in various
tool views, push more operations into the engine-
owned data models, specifically context menu creation.

Change-Id: I479c97102b9fb81611c6461c6df1cec59295179a
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/debugger/breakhandler.h

@@ -33,6 +33,8 @@
 #include <QCoreApplication>
 #include <QPointer>
 
+namespace Utils { class ItemViewEvent; }
+
 namespace Debugger {
 namespace Internal {
 
@@ -157,7 +159,9 @@ inline uint qHash(const Debugger::Internal::Breakpoint &b) { return b.hash(); }
 
 typedef QList<Breakpoint> Breakpoints;
 
-class BreakHandler : public Utils::LeveledTreeModel<Utils::TreeItem, BreakpointItem, LocationItem>
+using BreakModel = Utils::LeveledTreeModel<Utils::TypedTreeItem<BreakpointItem>, BreakpointItem, LocationItem>;
+
+class BreakHandler : public BreakModel
 {
     Q_OBJECT
 
@@ -200,8 +204,15 @@ public:
     void setWatchpointAtExpression(const QString &exp);
 
     Breakpoint breakpointById(BreakpointModelId id) const;
+    void editBreakpoint(Breakpoint bp, QWidget *parent);
 
 private:
+    QVariant data(const QModelIndex &idx, int role) const override;
+    bool setData(const QModelIndex &idx, const QVariant &value, int role) override;
+    void timerEvent(QTimerEvent *event) override;
+
+    bool contextMenuEvent(const Utils::ItemViewEvent &ev);
+
     friend class BreakpointItem;
     friend class Breakpoint;
 
@@ -209,12 +220,17 @@ private:
     void saveBreakpoints();
 
     void appendBreakpointInternal(const BreakpointParameters &data);
+    void deleteBreakpoints(const Breakpoints &bps);
+    void deleteAllBreakpoints();
+    void setBreakpointsEnabled(const Breakpoints &bps, bool enabled);
+    void addBreakpoint();
+    void editBreakpoints(const Breakpoints &bps, QWidget *parent);
 
     Q_SLOT void changeLineNumberFromMarkerHelper(Debugger::Internal::BreakpointModelId id);
     Q_SLOT void deletionHelper(Debugger::Internal::BreakpointModelId id);
 
     void scheduleSynchronization();
-    void timerEvent(QTimerEvent *event);
+
     int m_syncTimerId;
 };