root/mojo/examples/aura_demo/aura_demo.cc

DEFINITIONS

1. GetMinimumSize
2. GetMaximumSize
3. OnBoundsChanged
4. GetCursor
5. GetNonClientComponent
6. ShouldDescendIntoChildForEventHandling
7. CanFocus
8. OnCaptureLost
9. OnPaint
10. OnDeviceScaleFactorChanged
11. OnWindowDestroying
12. OnWindowDestroyed
13. OnWindowTargetVisibilityChanged
14. HasHitTestMask
15. GetHitTestMask
16. GetDefaultParent
17. HostContextCreated
18. MojoMain

// Copyright 2013 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.

#include <stdio.h>
#include <string>

#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/message_loop/message_loop.h"
#include "mojo/examples/aura_demo/demo_screen.h"
#include "mojo/examples/aura_demo/window_tree_host_mojo.h"
#include "mojo/public/cpp/bindings/allocation_scope.h"
#include "mojo/public/cpp/gles2/gles2.h"
#include "mojo/public/cpp/shell/application.h"
#include "mojo/public/cpp/system/core.h"
#include "mojo/public/interfaces/shell/shell.mojom.h"
#include "mojo/services/native_viewport/native_viewport.mojom.h"
#include "ui/aura/client/default_capture_client.h"
#include "ui/aura/client/window_tree_client.h"
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/aura/window_delegate.h"
#include "ui/base/hit_test.h"
#include "ui/gfx/canvas.h"

#if defined(WIN32)
#if !defined(CDECL)
#define CDECL __cdecl
#endif
#define AURA_DEMO_EXPORT __declspec(dllexport)
#else
#define CDECL
#define AURA_DEMO_EXPORT __attribute__((visibility("default")))
#endif

namespace mojo {
namespace examples {

// Trivial WindowDelegate implementation that draws a colored background.
class DemoWindowDelegate : public aura::WindowDelegate {
 public:
  explicit DemoWindowDelegate(SkColor color) : color_(color) {}

  // Overridden from WindowDelegate:
  virtual gfx::Size GetMinimumSize() const OVERRIDE {
    return gfx::Size();
  }

  virtual gfx::Size GetMaximumSize() const OVERRIDE {
    return gfx::Size();
  }

  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
                               const gfx::Rect& new_bounds) OVERRIDE {}
  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE {
    return gfx::kNullCursor;
  }
  virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE {
    return HTCAPTION;
  }
  virtual bool ShouldDescendIntoChildForEventHandling(
      aura::Window* child,
      const gfx::Point& location) OVERRIDE {
    return true;
  }
  virtual bool CanFocus() OVERRIDE { return true; }
  virtual void OnCaptureLost() OVERRIDE {}
  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
    canvas->DrawColor(color_, SkXfermode::kSrc_Mode);
  }
  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {}
  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE {}
  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE {}
  virtual bool HasHitTestMask() const OVERRIDE { return false; }
  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE {}

 private:
  SkColor color_;

  DISALLOW_COPY_AND_ASSIGN(DemoWindowDelegate);
};

class DemoWindowTreeClient : public aura::client::WindowTreeClient {
 public:
  explicit DemoWindowTreeClient(aura::Window* window) : window_(window) {
    aura::client::SetWindowTreeClient(window_, this);
  }

  virtual ~DemoWindowTreeClient() {
    aura::client::SetWindowTreeClient(window_, NULL);
  }

  // Overridden from aura::client::WindowTreeClient:
  virtual aura::Window* GetDefaultParent(aura::Window* context,
                                         aura::Window* window,
                                         const gfx::Rect& bounds) OVERRIDE {
    if (!capture_client_) {
      capture_client_.reset(
          new aura::client::DefaultCaptureClient(window_->GetRootWindow()));
    }
    return window_;
  }

 private:
  aura::Window* window_;

  scoped_ptr<aura::client::DefaultCaptureClient> capture_client_;

  DISALLOW_COPY_AND_ASSIGN(DemoWindowTreeClient);
};

class AuraDemo : public Application {
 public:
  explicit AuraDemo(MojoHandle shell_handle) : Application(shell_handle) {
    screen_.reset(DemoScreen::Create());
    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());

    InterfacePipe<NativeViewport, AnyInterface> pipe;

    mojo::AllocationScope scope;
    shell()->Connect("mojo:mojo_native_viewport_service",
                     pipe.handle_to_peer.Pass());
    window_tree_host_.reset(new WindowTreeHostMojo(
        pipe.handle_to_self.Pass(),
        gfx::Rect(800, 600),
        base::Bind(&AuraDemo::HostContextCreated, base::Unretained(this))));
  }

 private:
  void HostContextCreated() {
    window_tree_host_->InitHost();

    window_tree_client_.reset(
        new DemoWindowTreeClient(window_tree_host_->window()));

    delegate1_.reset(new DemoWindowDelegate(SK_ColorBLUE));
    window1_ = new aura::Window(delegate1_.get());
    window1_->Init(aura::WINDOW_LAYER_TEXTURED);
    window1_->SetBounds(gfx::Rect(100, 100, 400, 400));
    window1_->Show();
    window_tree_host_->window()->AddChild(window1_);

    delegate2_.reset(new DemoWindowDelegate(SK_ColorRED));
    window2_ = new aura::Window(delegate2_.get());
    window2_->Init(aura::WINDOW_LAYER_TEXTURED);
    window2_->SetBounds(gfx::Rect(200, 200, 350, 350));
    window2_->Show();
    window_tree_host_->window()->AddChild(window2_);

    delegate21_.reset(new DemoWindowDelegate(SK_ColorGREEN));
    window21_ = new aura::Window(delegate21_.get());
    window21_->Init(aura::WINDOW_LAYER_TEXTURED);
    window21_->SetBounds(gfx::Rect(10, 10, 50, 50));
    window21_->Show();
    window2_->AddChild(window21_);

    window_tree_host_->Show();
  }

  scoped_ptr<DemoScreen> screen_;

  scoped_ptr<DemoWindowTreeClient> window_tree_client_;

  scoped_ptr<DemoWindowDelegate> delegate1_;
  scoped_ptr<DemoWindowDelegate> delegate2_;
  scoped_ptr<DemoWindowDelegate> delegate21_;

  aura::Window* window1_;
  aura::Window* window2_;
  aura::Window* window21_;

  scoped_ptr<aura::WindowTreeHost> window_tree_host_;
};

}  // namespace examples
}  // namespace mojo

extern "C" AURA_DEMO_EXPORT MojoResult CDECL MojoMain(
    MojoHandle shell_handle) {
  CommandLine::Init(0, NULL);
  base::AtExitManager at_exit;
  base::MessageLoop loop;
  mojo::GLES2Initializer gles2;

  // TODO(beng): This crashes in a DCHECK on X11 because this thread's
  //             MessageLoop is not of TYPE_UI. I think we need a way to build
  //             Aura that doesn't define platform-specific stuff.
  aura::Env::CreateInstance();
  mojo::examples::AuraDemo app(shell_handle);
  loop.Run();

  return MOJO_RESULT_OK;
}