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