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      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/window/custom_frame_view.h"
      6 
      7 #include <algorithm>
      8 
      9 #include "base/strings/utf_string_conversions.h"
     10 #include "grit/ui_resources.h"
     11 #include "grit/ui_strings.h"
     12 #include "ui/base/hit_test.h"
     13 #include "ui/base/l10n/l10n_util.h"
     14 #include "ui/base/resource/resource_bundle.h"
     15 #include "ui/gfx/canvas.h"
     16 #include "ui/gfx/font.h"
     17 #include "ui/gfx/image/image.h"
     18 #include "ui/gfx/path.h"
     19 #include "ui/views/color_constants.h"
     20 #include "ui/views/controls/button/image_button.h"
     21 #include "ui/views/widget/widget.h"
     22 #include "ui/views/widget/widget_delegate.h"
     23 #include "ui/views/window/client_view.h"
     24 #include "ui/views/window/frame_background.h"
     25 #include "ui/views/window/window_resources.h"
     26 #include "ui/views/window/window_shape.h"
     27 
     28 #if defined(USE_AURA)
     29 #include "ui/views/widget/native_widget_aura.h"
     30 #elif defined(OS_WIN)
     31 #include "ui/views/widget/native_widget_win.h"
     32 #endif
     33 
     34 namespace views {
     35 
     36 namespace {
     37 
     38 // The frame border is only visible in restored mode and is hardcoded to 4 px on
     39 // each side regardless of the system window border size.
     40 const int kFrameBorderThickness = 4;
     41 // In the window corners, the resize areas don't actually expand bigger, but the
     42 // 16 px at the end of each edge triggers diagonal resizing.
     43 const int kResizeAreaCornerSize = 16;
     44 // The titlebar never shrinks too short to show the caption button plus some
     45 // padding below it.
     46 const int kCaptionButtonHeightWithPadding = 19;
     47 // The titlebar has a 2 px 3D edge along the top and bottom.
     48 const int kTitlebarTopAndBottomEdgeThickness = 2;
     49 // The icon is inset 2 px from the left frame border.
     50 const int kIconLeftSpacing = 2;
     51 // The icon never shrinks below 16 px on a side.
     52 const int kIconMinimumSize = 16;
     53 // The space between the window icon and the title text.
     54 const int kTitleIconOffsetX = 4;
     55 // The space between the title text and the caption buttons.
     56 const int kTitleCaptionSpacing = 5;
     57 
     58 #if defined(OS_CHROMEOS)
     59 // Chrome OS uses a dark gray.
     60 const SkColor kDefaultColorFrame = SkColorSetRGB(109, 109, 109);
     61 const SkColor kDefaultColorFrameInactive = SkColorSetRGB(176, 176, 176);
     62 #else
     63 // Windows and Linux use a blue.
     64 const SkColor kDefaultColorFrame = SkColorSetRGB(66, 116, 201);
     65 const SkColor kDefaultColorFrameInactive = SkColorSetRGB(161, 182, 228);
     66 #endif
     67 
     68 const gfx::Font& GetTitleFont() {
     69   static gfx::Font* title_font = NULL;
     70   if (!title_font) {
     71 #if defined(USE_AURA)
     72     title_font = new gfx::Font(NativeWidgetAura::GetWindowTitleFont());
     73 #elif defined(OS_WIN)
     74     title_font = new gfx::Font(NativeWidgetWin::GetWindowTitleFont());
     75 #elif defined(OS_LINUX)
     76     // TODO(ben): need to resolve what font this is.
     77     title_font = new gfx::Font();
     78 #endif
     79   }
     80   return *title_font;
     81 }
     82 
     83 }  // namespace
     84 
     85 ///////////////////////////////////////////////////////////////////////////////
     86 // CustomFrameView, public:
     87 
     88 CustomFrameView::CustomFrameView()
     89     : frame_(NULL),
     90       window_icon_(NULL),
     91       minimize_button_(NULL),
     92       maximize_button_(NULL),
     93       restore_button_(NULL),
     94       close_button_(NULL),
     95       should_show_maximize_button_(false),
     96       frame_background_(new FrameBackground()) {
     97 }
     98 
     99 CustomFrameView::~CustomFrameView() {
    100 }
    101 
    102 void CustomFrameView::Init(Widget* frame) {
    103   frame_ = frame;
    104 
    105   close_button_ = new ImageButton(this);
    106   close_button_->SetAccessibleName(
    107       l10n_util::GetStringUTF16(IDS_APP_ACCNAME_CLOSE));
    108 
    109   // Close button images will be set in LayoutWindowControls().
    110   AddChildView(close_button_);
    111 
    112   minimize_button_ = InitWindowCaptionButton(IDS_APP_ACCNAME_MINIMIZE,
    113       IDR_MINIMIZE, IDR_MINIMIZE_H, IDR_MINIMIZE_P);
    114 
    115   maximize_button_ = InitWindowCaptionButton(IDS_APP_ACCNAME_MAXIMIZE,
    116       IDR_MAXIMIZE, IDR_MAXIMIZE_H, IDR_MAXIMIZE_P);
    117 
    118   restore_button_ = InitWindowCaptionButton(IDS_APP_ACCNAME_RESTORE,
    119       IDR_RESTORE, IDR_RESTORE_H, IDR_RESTORE_P);
    120 
    121   should_show_maximize_button_ = frame_->widget_delegate()->CanMaximize();
    122 
    123   if (frame_->widget_delegate()->ShouldShowWindowIcon()) {
    124     window_icon_ = new ImageButton(this);
    125     AddChildView(window_icon_);
    126   }
    127 }
    128 
    129 ///////////////////////////////////////////////////////////////////////////////
    130 // CustomFrameView, NonClientFrameView implementation:
    131 
    132 gfx::Rect CustomFrameView::GetBoundsForClientView() const {
    133   return client_view_bounds_;
    134 }
    135 
    136 gfx::Rect CustomFrameView::GetWindowBoundsForClientBounds(
    137     const gfx::Rect& client_bounds) const {
    138   int top_height = NonClientTopBorderHeight();
    139   int border_thickness = NonClientBorderThickness();
    140   return gfx::Rect(std::max(0, client_bounds.x() - border_thickness),
    141                    std::max(0, client_bounds.y() - top_height),
    142                    client_bounds.width() + (2 * border_thickness),
    143                    client_bounds.height() + top_height + border_thickness);
    144 }
    145 
    146 int CustomFrameView::NonClientHitTest(const gfx::Point& point) {
    147   // Sanity check.
    148   if (!bounds().Contains(point))
    149     return HTNOWHERE;
    150 
    151   int frame_component = frame_->client_view()->NonClientHitTest(point);
    152 
    153   // See if we're in the sysmenu region.  (We check the ClientView first to be
    154   // consistent with OpaqueBrowserFrameView; it's not really necessary here.)
    155   gfx::Rect sysmenu_rect(IconBounds());
    156   // In maximized mode we extend the rect to the screen corner to take advantage
    157   // of Fitts' Law.
    158   if (frame_->IsMaximized())
    159     sysmenu_rect.SetRect(0, 0, sysmenu_rect.right(), sysmenu_rect.bottom());
    160   sysmenu_rect.set_x(GetMirroredXForRect(sysmenu_rect));
    161   if (sysmenu_rect.Contains(point))
    162     return (frame_component == HTCLIENT) ? HTCLIENT : HTSYSMENU;
    163 
    164   if (frame_component != HTNOWHERE)
    165     return frame_component;
    166 
    167   // Then see if the point is within any of the window controls.
    168   if (close_button_->GetMirroredBounds().Contains(point))
    169     return HTCLOSE;
    170   if (restore_button_->GetMirroredBounds().Contains(point))
    171     return HTMAXBUTTON;
    172   if (maximize_button_->GetMirroredBounds().Contains(point))
    173     return HTMAXBUTTON;
    174   if (minimize_button_->GetMirroredBounds().Contains(point))
    175     return HTMINBUTTON;
    176   if (window_icon_ && window_icon_->GetMirroredBounds().Contains(point))
    177     return HTSYSMENU;
    178 
    179   int window_component = GetHTComponentForFrame(point, FrameBorderThickness(),
    180       NonClientBorderThickness(), kResizeAreaCornerSize, kResizeAreaCornerSize,
    181       frame_->widget_delegate()->CanResize());
    182   // Fall back to the caption if no other component matches.
    183   return (window_component == HTNOWHERE) ? HTCAPTION : window_component;
    184 }
    185 
    186 void CustomFrameView::GetWindowMask(const gfx::Size& size,
    187                                     gfx::Path* window_mask) {
    188   DCHECK(window_mask);
    189   if (frame_->IsMaximized())
    190     return;
    191 
    192   GetDefaultWindowMask(size, window_mask);
    193 }
    194 
    195 void CustomFrameView::ResetWindowControls() {
    196   restore_button_->SetState(CustomButton::STATE_NORMAL);
    197   minimize_button_->SetState(CustomButton::STATE_NORMAL);
    198   maximize_button_->SetState(CustomButton::STATE_NORMAL);
    199   // The close button isn't affected by this constraint.
    200 }
    201 
    202 void CustomFrameView::UpdateWindowIcon() {
    203   if (window_icon_)
    204     window_icon_->SchedulePaint();
    205 }
    206 
    207 void CustomFrameView::UpdateWindowTitle() {
    208   SchedulePaintInRect(title_bounds_);
    209 }
    210 
    211 ///////////////////////////////////////////////////////////////////////////////
    212 // CustomFrameView, View overrides:
    213 
    214 void CustomFrameView::OnPaint(gfx::Canvas* canvas) {
    215   if (frame_->IsMaximized())
    216     PaintMaximizedFrameBorder(canvas);
    217   else
    218     PaintRestoredFrameBorder(canvas);
    219   PaintTitleBar(canvas);
    220   if (ShouldShowClientEdge())
    221     PaintRestoredClientEdge(canvas);
    222 }
    223 
    224 void CustomFrameView::Layout() {
    225   LayoutWindowControls();
    226   LayoutTitleBar();
    227   LayoutClientView();
    228 }
    229 
    230 gfx::Size CustomFrameView::GetPreferredSize() {
    231   return frame_->non_client_view()->GetWindowBoundsForClientBounds(
    232       gfx::Rect(frame_->client_view()->GetPreferredSize())).size();
    233 }
    234 
    235 gfx::Size CustomFrameView::GetMinimumSize() {
    236   return frame_->non_client_view()->GetWindowBoundsForClientBounds(
    237       gfx::Rect(frame_->client_view()->GetMinimumSize())).size();
    238 }
    239 
    240 gfx::Size CustomFrameView::GetMaximumSize() {
    241   gfx::Size max_size = frame_->client_view()->GetMaximumSize();
    242   gfx::Size converted_size =
    243       frame_->non_client_view()->GetWindowBoundsForClientBounds(
    244           gfx::Rect(max_size)).size();
    245   return gfx::Size(max_size.width() == 0 ? 0 : converted_size.width(),
    246                    max_size.height() == 0 ? 0 : converted_size.height());
    247 }
    248 
    249 ///////////////////////////////////////////////////////////////////////////////
    250 // CustomFrameView, ButtonListener implementation:
    251 
    252 void CustomFrameView::ButtonPressed(Button* sender, const ui::Event& event) {
    253   if (sender == close_button_)
    254     frame_->Close();
    255   else if (sender == minimize_button_)
    256     frame_->Minimize();
    257   else if (sender == maximize_button_)
    258     frame_->Maximize();
    259   else if (sender == restore_button_)
    260     frame_->Restore();
    261 }
    262 
    263 ///////////////////////////////////////////////////////////////////////////////
    264 // CustomFrameView, private:
    265 
    266 int CustomFrameView::FrameBorderThickness() const {
    267   return frame_->IsMaximized() ? 0 : kFrameBorderThickness;
    268 }
    269 
    270 int CustomFrameView::NonClientBorderThickness() const {
    271   // In maximized mode, we don't show a client edge.
    272   return FrameBorderThickness() +
    273       (ShouldShowClientEdge() ? kClientEdgeThickness : 0);
    274 }
    275 
    276 int CustomFrameView::NonClientTopBorderHeight() const {
    277   return std::max(FrameBorderThickness() + IconSize(),
    278                   CaptionButtonY() + kCaptionButtonHeightWithPadding) +
    279       TitlebarBottomThickness();
    280 }
    281 
    282 int CustomFrameView::CaptionButtonY() const {
    283   // Maximized buttons start at window top so that even if their images aren't
    284   // drawn flush with the screen edge, they still obey Fitts' Law.
    285   return frame_->IsMaximized() ? FrameBorderThickness() : kFrameShadowThickness;
    286 }
    287 
    288 int CustomFrameView::TitlebarBottomThickness() const {
    289   return kTitlebarTopAndBottomEdgeThickness +
    290       (ShouldShowClientEdge() ? kClientEdgeThickness : 0);
    291 }
    292 
    293 int CustomFrameView::IconSize() const {
    294 #if defined(OS_WIN)
    295   // This metric scales up if either the titlebar height or the titlebar font
    296   // size are increased.
    297   return GetSystemMetrics(SM_CYSMICON);
    298 #else
    299   return std::max(GetTitleFont().GetHeight(), kIconMinimumSize);
    300 #endif
    301 }
    302 
    303 gfx::Rect CustomFrameView::IconBounds() const {
    304   int size = IconSize();
    305   int frame_thickness = FrameBorderThickness();
    306   // Our frame border has a different "3D look" than Windows'.  Theirs has a
    307   // more complex gradient on the top that they push their icon/title below;
    308   // then the maximized window cuts this off and the icon/title are centered
    309   // in the remaining space.  Because the apparent shape of our border is
    310   // simpler, using the same positioning makes things look slightly uncentered
    311   // with restored windows, so when the window is restored, instead of
    312   // calculating the remaining space from below the frame border, we calculate
    313   // from below the 3D edge.
    314   int unavailable_px_at_top = frame_->IsMaximized() ?
    315       frame_thickness : kTitlebarTopAndBottomEdgeThickness;
    316   // When the icon is shorter than the minimum space we reserve for the caption
    317   // button, we vertically center it.  We want to bias rounding to put extra
    318   // space above the icon, since the 3D edge (+ client edge, for restored
    319   // windows) below looks (to the eye) more like additional space than does the
    320   // 3D edge (or nothing at all, for maximized windows) above; hence the +1.
    321   int y = unavailable_px_at_top + (NonClientTopBorderHeight() -
    322       unavailable_px_at_top - size - TitlebarBottomThickness() + 1) / 2;
    323   return gfx::Rect(frame_thickness + kIconLeftSpacing, y, size, size);
    324 }
    325 
    326 bool CustomFrameView::ShouldShowClientEdge() const {
    327   return !frame_->IsMaximized();
    328 }
    329 
    330 void CustomFrameView::PaintRestoredFrameBorder(gfx::Canvas* canvas) {
    331   frame_background_->set_frame_color(GetFrameColor());
    332   const gfx::ImageSkia* frame_image = GetFrameImage();
    333   frame_background_->set_theme_image(frame_image);
    334   frame_background_->set_top_area_height(frame_image->height());
    335 
    336   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    337 
    338   frame_background_->SetCornerImages(
    339       rb.GetImageNamed(IDR_WINDOW_TOP_LEFT_CORNER).ToImageSkia(),
    340       rb.GetImageNamed(IDR_WINDOW_TOP_RIGHT_CORNER).ToImageSkia(),
    341       rb.GetImageNamed(IDR_WINDOW_BOTTOM_LEFT_CORNER).ToImageSkia(),
    342       rb.GetImageNamed(IDR_WINDOW_BOTTOM_RIGHT_CORNER).ToImageSkia());
    343   frame_background_->SetSideImages(
    344       rb.GetImageNamed(IDR_WINDOW_LEFT_SIDE).ToImageSkia(),
    345       rb.GetImageNamed(IDR_WINDOW_TOP_CENTER).ToImageSkia(),
    346       rb.GetImageNamed(IDR_WINDOW_RIGHT_SIDE).ToImageSkia(),
    347       rb.GetImageNamed(IDR_WINDOW_BOTTOM_CENTER).ToImageSkia());
    348 
    349   frame_background_->PaintRestored(canvas, this);
    350 }
    351 
    352 void CustomFrameView::PaintMaximizedFrameBorder(gfx::Canvas* canvas) {
    353   const gfx::ImageSkia* frame_image = GetFrameImage();
    354   frame_background_->set_theme_image(frame_image);
    355   frame_background_->set_top_area_height(frame_image->height());
    356   frame_background_->PaintMaximized(canvas, this);
    357 
    358   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    359 
    360   // TODO(jamescook): Migrate this into FrameBackground.
    361   // The bottom of the titlebar actually comes from the top of the Client Edge
    362   // graphic, with the actual client edge clipped off the bottom.
    363   const gfx::ImageSkia* titlebar_bottom = rb.GetImageNamed(
    364       IDR_APP_TOP_CENTER).ToImageSkia();
    365   int edge_height = titlebar_bottom->height() -
    366       (ShouldShowClientEdge() ? kClientEdgeThickness : 0);
    367   canvas->TileImageInt(*titlebar_bottom, 0,
    368       frame_->client_view()->y() - edge_height, width(), edge_height);
    369 }
    370 
    371 void CustomFrameView::PaintTitleBar(gfx::Canvas* canvas) {
    372   WidgetDelegate* delegate = frame_->widget_delegate();
    373 
    374   // It seems like in some conditions we can be asked to paint after the window
    375   // that contains us is WM_DESTROYed. At this point, our delegate is NULL. The
    376   // correct long term fix may be to shut down the RootView in WM_DESTROY.
    377   if (!delegate)
    378     return;
    379 
    380   canvas->DrawStringInt(delegate->GetWindowTitle(), GetTitleFont(),
    381                         SK_ColorWHITE, GetMirroredXForRect(title_bounds_),
    382                         title_bounds_.y(), title_bounds_.width(),
    383                         title_bounds_.height());
    384 }
    385 
    386 void CustomFrameView::PaintRestoredClientEdge(gfx::Canvas* canvas) {
    387   gfx::Rect client_area_bounds = frame_->client_view()->bounds();
    388   int client_area_top = client_area_bounds.y();
    389 
    390   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    391 
    392   // Top: left, center, right sides.
    393   const gfx::ImageSkia* top_left = rb.GetImageSkiaNamed(IDR_APP_TOP_LEFT);
    394   const gfx::ImageSkia* top_center = rb.GetImageSkiaNamed(IDR_APP_TOP_CENTER);
    395   const gfx::ImageSkia* top_right = rb.GetImageSkiaNamed(IDR_APP_TOP_RIGHT);
    396   int top_edge_y = client_area_top - top_center->height();
    397   canvas->DrawImageInt(*top_left,
    398                        client_area_bounds.x() - top_left->width(),
    399                        top_edge_y);
    400   canvas->TileImageInt(*top_center,
    401                        client_area_bounds.x(),
    402                        top_edge_y,
    403                        client_area_bounds.width(),
    404                        top_center->height());
    405   canvas->DrawImageInt(*top_right, client_area_bounds.right(), top_edge_y);
    406 
    407   // Right side.
    408   const gfx::ImageSkia* right = rb.GetImageSkiaNamed(IDR_CONTENT_RIGHT_SIDE);
    409   int client_area_bottom =
    410       std::max(client_area_top, client_area_bounds.bottom());
    411   int client_area_height = client_area_bottom - client_area_top;
    412   canvas->TileImageInt(*right,
    413                        client_area_bounds.right(),
    414                        client_area_top,
    415                        right->width(),
    416                        client_area_height);
    417 
    418   // Bottom: left, center, right sides.
    419   const gfx::ImageSkia* bottom_left =
    420       rb.GetImageSkiaNamed(IDR_CONTENT_BOTTOM_LEFT_CORNER);
    421   const gfx::ImageSkia* bottom_center =
    422       rb.GetImageSkiaNamed(IDR_CONTENT_BOTTOM_CENTER);
    423   const gfx::ImageSkia* bottom_right =
    424       rb.GetImageSkiaNamed(IDR_CONTENT_BOTTOM_RIGHT_CORNER);
    425 
    426   canvas->DrawImageInt(*bottom_left,
    427                        client_area_bounds.x() - bottom_left->width(),
    428                        client_area_bottom);
    429 
    430   canvas->TileImageInt(*bottom_center,
    431                        client_area_bounds.x(),
    432                        client_area_bottom,
    433                        client_area_bounds.width(),
    434                        bottom_right->height());
    435 
    436   canvas->DrawImageInt(*bottom_right,
    437                        client_area_bounds.right(),
    438                        client_area_bottom);
    439   // Left side.
    440   const gfx::ImageSkia* left = rb.GetImageSkiaNamed(IDR_CONTENT_LEFT_SIDE);
    441   canvas->TileImageInt(*left,
    442                        client_area_bounds.x() - left->width(),
    443                        client_area_top,
    444                        left->width(),
    445                        client_area_height);
    446 
    447   // Draw the color to fill in the edges.
    448   canvas->FillRect(gfx::Rect(client_area_bounds.x() - 1,
    449                              client_area_top - 1,
    450                              client_area_bounds.width() + 1,
    451                              client_area_bottom - client_area_top + 1),
    452                    kClientEdgeColor);
    453 }
    454 
    455 SkColor CustomFrameView::GetFrameColor() const {
    456   return frame_->IsActive() ? kDefaultColorFrame : kDefaultColorFrameInactive;
    457 }
    458 
    459 const gfx::ImageSkia* CustomFrameView::GetFrameImage() const {
    460   return ui::ResourceBundle::GetSharedInstance().GetImageNamed(
    461       frame_->IsActive() ? IDR_FRAME : IDR_FRAME_INACTIVE).ToImageSkia();
    462 }
    463 
    464 void CustomFrameView::LayoutWindowControls() {
    465   close_button_->SetImageAlignment(ImageButton::ALIGN_LEFT,
    466                                    ImageButton::ALIGN_BOTTOM);
    467   int caption_y = CaptionButtonY();
    468   bool is_maximized = frame_->IsMaximized();
    469   // There should always be the same number of non-shadow pixels visible to the
    470   // side of the caption buttons.  In maximized mode we extend the rightmost
    471   // button to the screen corner to obey Fitts' Law.
    472   int right_extra_width = is_maximized ?
    473       (kFrameBorderThickness - kFrameShadowThickness) : 0;
    474   gfx::Size close_button_size = close_button_->GetPreferredSize();
    475   close_button_->SetBounds(width() - FrameBorderThickness() -
    476       right_extra_width - close_button_size.width(), caption_y,
    477       close_button_size.width() + right_extra_width,
    478       close_button_size.height());
    479 
    480   // When the window is restored, we show a maximized button; otherwise, we show
    481   // a restore button.
    482   bool is_restored = !is_maximized && !frame_->IsMinimized();
    483   ImageButton* invisible_button = is_restored ? restore_button_
    484                                               : maximize_button_;
    485   invisible_button->SetVisible(false);
    486 
    487   ImageButton* visible_button = is_restored ? maximize_button_
    488                                             : restore_button_;
    489   FramePartImage normal_part, hot_part, pushed_part;
    490   int next_button_x;
    491   if (should_show_maximize_button_) {
    492     visible_button->SetVisible(true);
    493     visible_button->SetImageAlignment(ImageButton::ALIGN_LEFT,
    494                                       ImageButton::ALIGN_BOTTOM);
    495     gfx::Size visible_button_size = visible_button->GetPreferredSize();
    496     visible_button->SetBounds(close_button_->x() - visible_button_size.width(),
    497                               caption_y, visible_button_size.width(),
    498                               visible_button_size.height());
    499     next_button_x = visible_button->x();
    500   } else {
    501     visible_button->SetVisible(false);
    502     next_button_x = close_button_->x();
    503   }
    504 
    505   minimize_button_->SetVisible(true);
    506   minimize_button_->SetImageAlignment(ImageButton::ALIGN_LEFT,
    507                                       ImageButton::ALIGN_BOTTOM);
    508   gfx::Size minimize_button_size = minimize_button_->GetPreferredSize();
    509   minimize_button_->SetBounds(
    510       next_button_x - minimize_button_size.width(), caption_y,
    511       minimize_button_size.width(),
    512       minimize_button_size.height());
    513 
    514   normal_part = IDR_CLOSE;
    515   hot_part = IDR_CLOSE_H;
    516   pushed_part = IDR_CLOSE_P;
    517 
    518   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    519 
    520   close_button_->SetImage(CustomButton::STATE_NORMAL,
    521                           rb.GetImageNamed(normal_part).ToImageSkia());
    522   close_button_->SetImage(CustomButton::STATE_HOVERED,
    523                           rb.GetImageNamed(hot_part).ToImageSkia());
    524   close_button_->SetImage(CustomButton::STATE_PRESSED,
    525                           rb.GetImageNamed(pushed_part).ToImageSkia());
    526 }
    527 
    528 void CustomFrameView::LayoutTitleBar() {
    529   // The window title position is calculated based on the icon position, even
    530   // when there is no icon.
    531   gfx::Rect icon_bounds(IconBounds());
    532   bool show_window_icon = window_icon_ != NULL;
    533   if (show_window_icon)
    534     window_icon_->SetBoundsRect(icon_bounds);
    535 
    536   // The offset between the window left edge and the title text.
    537   int title_x = show_window_icon ? icon_bounds.right() + kTitleIconOffsetX
    538                                  : icon_bounds.x();
    539   int title_height = GetTitleFont().GetHeight();
    540   // We bias the title position so that when the difference between the icon and
    541   // title heights is odd, the extra pixel of the title is above the vertical
    542   // midline rather than below.  This compensates for how the icon is already
    543   // biased downwards (see IconBounds()) and helps prevent descenders on the
    544   // title from overlapping the 3D edge at the bottom of the titlebar.
    545   title_bounds_.SetRect(title_x,
    546       icon_bounds.y() + ((icon_bounds.height() - title_height - 1) / 2),
    547       std::max(0, minimize_button_->x() - kTitleCaptionSpacing -
    548       title_x), title_height);
    549 }
    550 
    551 void CustomFrameView::LayoutClientView() {
    552   int top_height = NonClientTopBorderHeight();
    553   int border_thickness = NonClientBorderThickness();
    554   client_view_bounds_.SetRect(border_thickness, top_height,
    555       std::max(0, width() - (2 * border_thickness)),
    556       std::max(0, height() - top_height - border_thickness));
    557 }
    558 
    559 ImageButton* CustomFrameView::InitWindowCaptionButton(
    560     int accessibility_string_id,
    561     int normal_image_id,
    562     int hot_image_id,
    563     int pushed_image_id) {
    564   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    565   ImageButton* button = new ImageButton(this);
    566   button->SetAccessibleName(l10n_util::GetStringUTF16(accessibility_string_id));
    567   button->SetImage(CustomButton::STATE_NORMAL,
    568                    rb.GetImageNamed(normal_image_id).ToImageSkia());
    569   button->SetImage(CustomButton::STATE_HOVERED,
    570                    rb.GetImageNamed(hot_image_id).ToImageSkia());
    571   button->SetImage(CustomButton::STATE_PRESSED,
    572                    rb.GetImageNamed(pushed_image_id).ToImageSkia());
    573   AddChildView(button);
    574   return button;
    575 }
    576 
    577 }  // namespace views
    578