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      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 #include "mojo/examples/wm_flow/wm/frame_controller.h"
      6 
      7 #include "base/strings/utf_string_conversions.h"
      8 #include "mojo/services/public/cpp/view_manager/view.h"
      9 #include "mojo/views/native_widget_view_manager.h"
     10 #include "ui/views/background.h"
     11 #include "ui/views/controls/button/label_button.h"
     12 #include "ui/views/layout/layout_manager.h"
     13 #include "ui/views/widget/widget.h"
     14 
     15 class FrameController::LayoutManager : public views::LayoutManager,
     16                                        public views::ButtonListener {
     17  public:
     18   explicit LayoutManager(FrameController* controller)
     19       : controller_(controller),
     20         close_button_(
     21             new views::LabelButton(this, base::ASCIIToUTF16("Begone"))),
     22         maximize_button_(
     23             new views::LabelButton(this, base::ASCIIToUTF16("Embiggen"))) {}
     24   virtual ~LayoutManager() {}
     25 
     26  private:
     27   static const int kButtonFrameMargin = 5;
     28   static const int kButtonFrameSpacing = 2;
     29   static const int kFrameSize = 10;
     30 
     31   // Overridden from views::LayoutManager:
     32   virtual void Installed(views::View* host) OVERRIDE {
     33     host->AddChildView(close_button_);
     34     host->AddChildView(maximize_button_);
     35   }
     36   virtual void Layout(views::View* host) OVERRIDE {
     37     gfx::Size ps = close_button_->GetPreferredSize();
     38     gfx::Rect bounds = host->GetLocalBounds();
     39     close_button_->SetBounds(bounds.right() - kButtonFrameMargin - ps.width(),
     40                              kButtonFrameMargin, ps.width(), ps.height());
     41 
     42     ps = maximize_button_->GetPreferredSize();
     43     maximize_button_->SetBounds(
     44         close_button_->x() - kButtonFrameSpacing - ps.width(),
     45         kButtonFrameMargin, ps.width(), ps.height());
     46 
     47     bounds.Inset(kFrameSize,
     48                  close_button_->bounds().bottom() + kButtonFrameMargin,
     49                  kFrameSize, kFrameSize);
     50     controller_->app_view_->SetBounds(bounds);
     51   }
     52   virtual gfx::Size GetPreferredSize(const views::View* host) const OVERRIDE {
     53     return gfx::Size();
     54   }
     55 
     56   // Overridden from views::ButtonListener:
     57   virtual void ButtonPressed(views::Button* sender,
     58                              const ui::Event& event) OVERRIDE {
     59     if (sender == close_button_)
     60       controller_->CloseWindow();
     61     else if (sender == maximize_button_)
     62       controller_->ToggleMaximize();
     63   }
     64 
     65   FrameController* controller_;
     66   views::Button* close_button_;
     67   views::Button* maximize_button_;
     68 
     69   DISALLOW_COPY_AND_ASSIGN(LayoutManager);
     70 };
     71 
     72 ////////////////////////////////////////////////////////////////////////////////
     73 // FrameController, public:
     74 
     75 FrameController::FrameController(mojo::View* view, mojo::View** app_view)
     76     : view_(view),
     77       app_view_(mojo::View::Create(view->view_manager())),
     78       frame_view_(new views::View),
     79       frame_view_layout_manager_(new LayoutManager(this)),
     80       widget_(new views::Widget),
     81       maximized_(false) {
     82   view_->AddChild(app_view_);
     83   view_->AddObserver(this);
     84   *app_view = app_view_;
     85   frame_view_->set_background(
     86       views::Background::CreateSolidBackground(SK_ColorBLUE));
     87   frame_view_->SetLayoutManager(frame_view_layout_manager_);
     88   views::Widget::InitParams params(
     89       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
     90   params.native_widget = new mojo::NativeWidgetViewManager(widget_, view_);
     91   params.bounds = gfx::Rect(view_->bounds().size());
     92   widget_->Init(params);
     93   widget_->SetContentsView(frame_view_);
     94   widget_->Show();
     95 }
     96 
     97 FrameController::~FrameController() {}
     98 
     99 void FrameController::CloseWindow() {
    100   app_view_->Destroy();
    101   view_->Destroy();
    102 }
    103 
    104 void FrameController::ToggleMaximize() {
    105   if (!maximized_)
    106     restored_bounds_ = view_->bounds();
    107   maximized_ = !maximized_;
    108   if (maximized_)
    109     view_->SetBounds(view_->parent()->bounds());
    110   else
    111     view_->SetBounds(restored_bounds_);
    112 }
    113 
    114 ////////////////////////////////////////////////////////////////////////////////
    115 // FrameController, mojo::ViewObserver implementation:
    116 
    117 void FrameController::OnViewDestroyed(mojo::View* view) {
    118   view_->RemoveObserver(this);
    119   delete this;
    120 }
    121