ui/views/examples/vector_example.cc

   1 // Copyright 2015 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/vector_example.h"
   6
   7 #include "base/files/file_path.h"
   8 #include "base/files/file_util.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "ui/gfx/paint_vector_icon.h"
  12 #include "ui/gfx/vector_icons_public2.h"
  13 #include "ui/views/controls/button/blue_button.h"
  14 #include "ui/views/controls/button/button.h"
  15 #include "ui/views/controls/image_view.h"
  16 #include "ui/views/controls/textfield/textfield.h"
  17 #include "ui/views/controls/textfield/textfield_controller.h"
  18 #include "ui/views/layout/box_layout.h"
  19 #include "ui/views/layout/fill_layout.h"
  20 #include "ui/views/view.h"
  21
  22 namespace views {
  23 namespace examples {
  24
  25 namespace {
  26
  27 class VectorIconGallery : public View,
  28                           public TextfieldController,
  29                           public ButtonListener {
  30  public:
  31   VectorIconGallery()
  32       : image_view_(new ImageView()),
  33         size_input_(new Textfield()),
  34         color_input_(new Textfield()),
  35         file_chooser_(new Textfield()),
  36         file_go_button_(new BlueButton(this, base::ASCIIToUTF16("Render"))),
  37         vector_id_(0),
  38         size_(32),
  39         color_(SK_ColorRED) {
  40     AddChildView(size_input_);
  41     AddChildView(color_input_);
  42     AddChildView(image_view_);
  43
  44     file_chooser_->set_placeholder_text(
  45         base::ASCIIToUTF16("Or enter a file to read"));
  46     View* file_container = new View();
  47     BoxLayout* file_box = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
  48     file_container->SetLayoutManager(file_box);
  49     file_container->AddChildView(file_chooser_);
  50     file_container->AddChildView(file_go_button_);
  51     file_box->SetFlexForView(file_chooser_, 1);
  52     AddChildView(file_container);
  53
  54     size_input_->set_placeholder_text(base::ASCIIToUTF16("Size in dip"));
  55     size_input_->set_controller(this);
  56     color_input_->set_placeholder_text(base::ASCIIToUTF16("Color (AARRGGBB)"));
  57     color_input_->set_controller(this);
  58
  59     BoxLayout* box = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
  60     SetLayoutManager(box);
  61     box->SetFlexForView(image_view_, 1);
  62     UpdateImage();
  63   }
  64
  65   ~VectorIconGallery() override {}
  66
  67   // View implementation.
  68   bool OnMousePressed(const ui::MouseEvent& event) override {
  69     if (GetEventHandlerForPoint(event.location()) == image_view_) {
  70       vector_id_ = ((vector_id_ + 1) %
  71                     static_cast<int>(gfx::VectorIconId::VECTOR_ICON_NONE));
  72       UpdateImage();
  73       return true;
  74     }
  75     return false;
  76   }
  77
  78   // TextfieldController implementation.
  79   void ContentsChanged(Textfield* sender,
  80                        const base::string16& new_contents) override {
  81     if (sender == size_input_) {
  82       if (base::StringToSizeT(new_contents, &size_))
  83         UpdateImage();
  84       else
  85         size_input_->SetText(base::string16());
  86
  87       return;
  88     }
  89
  90     DCHECK_EQ(color_input_, sender);
  91     if (new_contents.size() != 8u)
  92       return;
  93     unsigned new_color =
  94         strtoul(base::UTF16ToASCII(new_contents).c_str(), nullptr, 16);
  95     if (new_color <= 0xffffffff) {
  96       color_ = new_color;
  97       UpdateImage();
  98     }
  99   }
 100
 101   // ButtonListener
 102   void ButtonPressed(Button* sender, const ui::Event& event) override {
 103     DCHECK_EQ(file_go_button_, sender);
 104     std::string contents;
 105 #if defined(OS_POSIX)
 106     base::FilePath path(base::UTF16ToUTF8(file_chooser_->text()));
 107 #elif defined(OS_WIN)
 108     base::FilePath path(file_chooser_->text());
 109 #endif
 110     base::ReadFileToString(path, &contents);
 111     image_view_->SetImage(
 112         gfx::CreateVectorIconFromSource(contents, size_, color_));
 113   }
 114
 115   void UpdateImage() {
 116     image_view_->SetImage(gfx::CreateVectorIcon(
 117         static_cast<gfx::VectorIconId>(vector_id_), size_, color_));
 118   }
 119
 120  private:
 121   ImageView* image_view_;
 122   Textfield* size_input_;
 123   Textfield* color_input_;
 124   Textfield* file_chooser_;
 125   Button* file_go_button_;
 126
 127   int vector_id_;
 128   size_t size_;
 129   SkColor color_;
 130
 131   DISALLOW_COPY_AND_ASSIGN(VectorIconGallery);
 132 };
 133
 134 }  // namespace
 135
 136 VectorExample::VectorExample() : ExampleBase("Vector Icon") {}
 137
 138 VectorExample::~VectorExample() {}
 139
 140 void VectorExample::CreateExampleView(View* container) {
 141   container->SetLayoutManager(new FillLayout());
 142   container->AddChildView(new VectorIconGallery());
 143 }
 144
 145 }  // namespace examples
 146 }  // namespace views