ui/views/examples/throbber_example.cc

   1 // Copyright (c) 2011 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 "ui/views/examples/throbber_example.h"
   6
   7 #include "ui/views/controls/throbber.h"
   8 #include "ui/views/layout/fill_layout.h"
   9 #include "ui/views/view.h"
  10
  11 namespace views {
  12 namespace examples {
  13
  14 namespace {
  15
  16 // Time in ms per throbber frame.
  17 const int kThrobberFrameMs = 60;
  18
  19 class ThrobberView : public View {
  20  public:
  21   ThrobberView() {
  22     throbber_ = new Throbber(kThrobberFrameMs, false);
  23     AddChildView(throbber_);
  24     throbber_->SetVisible(true);
  25     throbber_->Start();
  26   }
  27
  28   virtual gfx::Size GetPreferredSize() const OVERRIDE {
  29     return gfx::Size(width(), height());
  30   }
  31
  32   virtual void Layout() OVERRIDE {
  33     View* child = child_at(0);
  34     gfx::Size ps = child->GetPreferredSize();
  35     child->SetBounds((width() - ps.width()) / 2,
  36                      (height() - ps.height()) / 2,
  37                      ps.width(), ps.height());
  38     SizeToPreferredSize();
  39   }
  40
  41  private:
  42   Throbber* throbber_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(ThrobberView);
  45 };
  46
  47 }  // namespace
  48
  49 ThrobberExample::ThrobberExample() : ExampleBase("Throbber") {
  50 }
  51
  52 ThrobberExample::~ThrobberExample() {
  53 }
  54
  55 void ThrobberExample::CreateExampleView(View* container) {
  56   container->SetLayoutManager(new FillLayout());
  57   container->AddChildView(new ThrobberView());
  58 }
  59
  60 }  // namespace examples
  61 }  // namespace views