Aura Icon Capture

ui/aura/window.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 92 matching lines @@
 
   int id() const { return id_; }
   void set_id(int id) { id_ = id; }
 
   const std::string& name() const { return name_; }
   void SetName(const std::string& name);
 
   const base::string16 title() const { return title_; }
   void SetTitle(const base::string16& title);
 
+  const gfx::ImageSkia icon() const { return icon_; }

[sky, 2016/08/08 19:19:47]

We generally do not add state like this to Window directly, rather to the
properties (see SetProperty). For an example of what I'm suggesting, look at
kShowStateKey.

[qiangchen, 2016/08/09 16:48:40]

I encounted some difficulty doing that way.
Simply creating a const of type WindowProperty<gfx::ImageSkia> does not compile
because there is no cast from gfx::ImageSkia to Int64. 

Using WindowProperty<gfx::ImageSkia*> does not work either, because
gfx::ImageSkia's lifetime has expired at the time of getting.

[sky, 2016/08/09 19:12:11]

You probably want DEFINE_OWNED_WINDOW_PROPERTY_KEY. The setter than looks
something like:

window->SetProperty(kIconProperty, new ImageSkia(image));

[qiangchen, 2016/08/09 21:10:28]

Done.

+  void SetIcon(const gfx::ImageSkia& icon);
+
   bool transparent() const { return transparent_; }
   void SetTransparent(bool transparent);
 
   // See description in Layer::SetFillsBoundsCompletely.
   void SetFillsBoundsCompletely(bool fills_bounds);
 
   WindowDelegate* delegate() { return delegate_; }
   const WindowDelegate* delegate() const { return delegate_; }
 
   const gfx::Rect& bounds() const { return bounds_; }
@@ skipping 367 matching lines @@
   // The visibility state of the window as set by Show()/Hide(). This may differ
   // from the visibility of the underlying layer, which may remain visible after
   // the window is hidden (e.g. to animate its disappearance).
   bool visible_;
 
   int id_;
   std::string name_;
 
   base::string16 title_;
 
+  gfx::ImageSkia icon_;
+
   // Whether layer is initialized as non-opaque.
   bool transparent_;
 
   std::unique_ptr<LayoutManager> layout_manager_;
   std::unique_ptr<ui::EventTargeter> targeter_;
 
   void* user_data_;
 
   // Makes the window pass all events through to any windows behind it.
   bool ignore_events_;
@@ skipping 13 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_