mojo/services/view_manager/node.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MOJO_SERVICES_VIEW_MANAGER_NODE_H_
   6 #define MOJO_SERVICES_VIEW_MANAGER_NODE_H_
   7
   8 #include <vector>
   9
  10 #include "base/logging.h"
  11 #include "mojo/services/view_manager/ids.h"
  12 #include "mojo/services/view_manager/view_manager_export.h"
  13 #include "ui/aura/window.h"
  14 #include "ui/aura/window_delegate.h"
  15 #include "ui/aura/window_observer.h"
  16
  17 namespace mojo {
  18 namespace services {
  19 namespace view_manager {
  20
  21 class NodeDelegate;
  22 class View;
  23
  24 // Represents a node in the graph. Delegate is informed of interesting events.
  25 class MOJO_VIEW_MANAGER_EXPORT Node
  26     : public aura::WindowObserver,
  27       public aura::WindowDelegate {
  28  public:
  29   Node(NodeDelegate* delegate, const NodeId& id);
  30   virtual ~Node();
  31
  32   void set_view_id(const ViewId& view_id) { view_id_ = view_id; }
  33   const ViewId& view_id() const { return view_id_; }
  34
  35   const NodeId& id() const { return id_; }
  36
  37   void Add(Node* child);
  38   void Remove(Node* child);
  39
  40   aura::Window* window() { return &window_; }
  41
  42   Node* GetParent();
  43
  44   std::vector<Node*> GetChildren();
  45
  46   // Sets the view associated with this node. Node does not own its View.
  47   void SetView(View* view);
  48   View* view() { return view_; }
  49
  50  private:
  51   // WindowObserver overrides:
  52   virtual void OnWindowHierarchyChanged(
  53       const aura::WindowObserver::HierarchyChangeParams& params) OVERRIDE;
  54
  55   // WindowDelegate overrides:
  56   virtual gfx::Size GetMinimumSize() const OVERRIDE;
  57   virtual gfx::Size GetMaximumSize() const OVERRIDE;
  58   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
  59                                const gfx::Rect& new_bounds) OVERRIDE;
  60   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE;
  61   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
  62   virtual bool ShouldDescendIntoChildForEventHandling(
  63       aura::Window* child,
  64       const gfx::Point& location) OVERRIDE;
  65   virtual bool CanFocus() OVERRIDE;
  66   virtual void OnCaptureLost() OVERRIDE;
  67   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
  68   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
  69   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
  70   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
  71   virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE;
  72   virtual bool HasHitTestMask() const OVERRIDE;
  73   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
  74
  75   NodeDelegate* delegate_;
  76   const NodeId id_;
  77
  78   // Weak pointer to view associated with this node.
  79   View* view_;
  80
  81   ViewId view_id_;
  82
  83   aura::Window window_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(Node);
  86 };
  87
  88 }  // namespace view_manager
  89 }  // namespace services
  90 }  // namespace mojo
  91
  92 #endif  // MOJO_SERVICES_VIEW_MANAGER_NODE_H_