ui/views/controls/button/checkbox.cc

   1 // Copyright (c) 2012 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/controls/button/checkbox.h"
   6
   7 #include "ui/accessibility/ax_view_state.h"
   8 #include "ui/base/resource/resource_bundle.h"
   9 #include "ui/resources/grit/ui_resources.h"
  10 #include "ui/views/controls/button/label_button_border.h"
  11 #include "ui/views/painter.h"
  12
  13 namespace views {
  14
  15 // static
  16 const char Checkbox::kViewClassName[] = "Checkbox";
  17
  18 Checkbox::Checkbox(const base::string16& label)
  19     : LabelButton(NULL, label),
  20       checked_(false) {
  21   SetHorizontalAlignment(gfx::ALIGN_LEFT);
  22   scoped_ptr<LabelButtonBorder> button_border(new LabelButtonBorder(style()));
  23   button_border->SetPainter(false, STATE_HOVERED, NULL);
  24   button_border->SetPainter(false, STATE_PRESSED, NULL);
  25   // Inset the trailing side by a couple pixels for the focus border.
  26   button_border->set_insets(gfx::Insets(0, 0, 0, 2));
  27   SetBorder(button_border.Pass());
  28   SetFocusable(true);
  29
  30   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  31
  32   // Unchecked/Unfocused images.
  33   SetCustomImage(false, false, STATE_NORMAL,
  34                  *rb.GetImageSkiaNamed(IDR_CHECKBOX));
  35   SetCustomImage(false, false, STATE_HOVERED,
  36                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_HOVER));
  37   SetCustomImage(false, false, STATE_PRESSED,
  38                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_PRESSED));
  39   SetCustomImage(false, false, STATE_DISABLED,
  40                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_DISABLED));
  41
  42   // Checked/Unfocused images.
  43   SetCustomImage(true, false, STATE_NORMAL,
  44                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_CHECKED));
  45   SetCustomImage(true, false, STATE_HOVERED,
  46                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_CHECKED_HOVER));
  47   SetCustomImage(true, false, STATE_PRESSED,
  48                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_CHECKED_PRESSED));
  49   SetCustomImage(true, false, STATE_DISABLED,
  50                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_CHECKED_DISABLED));
  51
  52   // Unchecked/Focused images.
  53   SetCustomImage(false, true, STATE_NORMAL,
  54                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_FOCUSED));
  55   SetCustomImage(false, true, STATE_HOVERED,
  56                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_FOCUSED_HOVER));
  57   SetCustomImage(false, true, STATE_PRESSED,
  58                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_FOCUSED_PRESSED));
  59
  60   // Checked/Focused images.
  61   SetCustomImage(true, true, STATE_NORMAL,
  62                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_FOCUSED_CHECKED));
  63   SetCustomImage(true, true, STATE_HOVERED,
  64                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_FOCUSED_CHECKED_HOVER));
  65   SetCustomImage(true, true, STATE_PRESSED,
  66                  *rb.GetImageSkiaNamed(IDR_CHECKBOX_FOCUSED_CHECKED_PRESSED));
  67
  68   // Limit the checkbox height to match the legacy appearance.
  69   const gfx::Size preferred_size(LabelButton::GetPreferredSize());
  70   SetMinSize(gfx::Size(0, preferred_size.height() + 4));
  71 }
  72
  73 Checkbox::~Checkbox() {
  74 }
  75
  76 void Checkbox::SetChecked(bool checked) {
  77   checked_ = checked;
  78   UpdateImage();
  79 }
  80
  81 void Checkbox::Layout() {
  82   LabelButton::Layout();
  83
  84   // Construct a focus painter that only surrounds the label area.
  85   gfx::Rect rect = label()->GetMirroredBounds();
  86   rect.Inset(-2, 3);
  87   SetFocusPainter(Painter::CreateDashedFocusPainterWithInsets(
  88                       gfx::Insets(rect.y(), rect.x(),
  89                                   height() - rect.bottom(),
  90                                   width() - rect.right())));
  91 }
  92
  93 const char* Checkbox::GetClassName() const {
  94   return kViewClassName;
  95 }
  96
  97 void Checkbox::GetAccessibleState(ui::AXViewState* state) {
  98   LabelButton::GetAccessibleState(state);
  99   state->role = ui::AX_ROLE_CHECK_BOX;
 100   if (checked())
 101     state->AddStateFlag(ui::AX_STATE_CHECKED);
 102 }
 103
 104 void Checkbox::OnFocus() {
 105   LabelButton::OnFocus();
 106   UpdateImage();
 107 }
 108
 109 void Checkbox::OnBlur() {
 110   LabelButton::OnBlur();
 111   UpdateImage();
 112 }
 113
 114 const gfx::ImageSkia& Checkbox::GetImage(ButtonState for_state) {
 115   const size_t checked_index = checked_ ? 1 : 0;
 116   const size_t focused_index = HasFocus() ? 1 : 0;
 117   if (for_state != STATE_NORMAL &&
 118       images_[checked_index][focused_index][for_state].isNull())
 119     return images_[checked_index][focused_index][STATE_NORMAL];
 120   return images_[checked_index][focused_index][for_state];
 121 }
 122
 123 void Checkbox::SetCustomImage(bool checked,
 124                               bool focused,
 125                               ButtonState for_state,
 126                               const gfx::ImageSkia& image) {
 127   const size_t checked_index = checked ? 1 : 0;
 128   const size_t focused_index = focused ? 1 : 0;
 129   images_[checked_index][focused_index][for_state] = image;
 130   UpdateImage();
 131 }
 132
 133 void Checkbox::NotifyClick(const ui::Event& event) {
 134   SetChecked(!checked());
 135   LabelButton::NotifyClick(event);
 136 }
 137
 138 ui::NativeTheme::Part Checkbox::GetThemePart() const {
 139   return ui::NativeTheme::kCheckbox;
 140 }
 141
 142 void Checkbox::GetExtraParams(ui::NativeTheme::ExtraParams* params) const {
 143   LabelButton::GetExtraParams(params);
 144   params->button.checked = checked_;
 145 }
 146
 147 }  // namespace views