src/ui/views/window/dialog_client_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/dialog_client_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "ui/events/keycodes/keyboard_codes.h"
  10 #include "ui/views/background.h"
  11 #include "ui/views/controls/button/blue_button.h"
  12 #include "ui/views/controls/button/label_button.h"
  13 #include "ui/views/layout/layout_constants.h"
  14 #include "ui/views/widget/widget.h"
  15 #include "ui/views/window/dialog_delegate.h"
  16
  17 namespace views {
  18
  19 namespace {
  20
  21 // The group used by the buttons.  This name is chosen voluntarily big not to
  22 // conflict with other groups that could be in the dialog content.
  23 const int kButtonGroup = 6666;
  24
  25 #if defined(OS_WIN) || defined(OS_CHROMEOS)
  26 const bool kIsOkButtonOnLeftSide = true;
  27 #else
  28 const bool kIsOkButtonOnLeftSide = false;
  29 #endif
  30
  31 // Returns true if the given view should be shown (i.e. exists and is
  32 // visible).
  33 bool ShouldShow(View* view) {
  34   return view && view->visible();
  35 }
  36
  37 // Do the layout for a button.
  38 void LayoutButton(LabelButton* button, gfx::Rect* row_bounds) {
  39   if (!button)
  40     return;
  41
  42   const gfx::Size size = button->GetPreferredSize();
  43   row_bounds->set_width(row_bounds->width() - size.width());
  44   button->SetBounds(row_bounds->right(), row_bounds->y(),
  45                     size.width(), row_bounds->height());
  46   row_bounds->set_width(row_bounds->width() - kRelatedButtonHSpacing);
  47 }
  48
  49 }  // namespace
  50
  51 ///////////////////////////////////////////////////////////////////////////////
  52 // DialogClientView, public:
  53
  54 DialogClientView::DialogClientView(Widget* owner, View* contents_view)
  55     : ClientView(owner, contents_view),
  56       ok_button_(NULL),
  57       cancel_button_(NULL),
  58       default_button_(NULL),
  59       focus_manager_(NULL),
  60       extra_view_(NULL),
  61       footnote_view_(NULL),
  62       notified_delegate_(false) {
  63 }
  64
  65 DialogClientView::~DialogClientView() {
  66 }
  67
  68 void DialogClientView::AcceptWindow() {
  69   // Only notify the delegate once. See |notified_delegate_|'s comment.
  70   if (!notified_delegate_ && GetDialogDelegate()->Accept(false)) {
  71     notified_delegate_ = true;
  72     Close();
  73   }
  74 }
  75
  76 void DialogClientView::CancelWindow() {
  77   // Only notify the delegate once. See |notified_delegate_|'s comment.
  78   if (!notified_delegate_ && GetDialogDelegate()->Cancel()) {
  79     notified_delegate_ = true;
  80     Close();
  81   }
  82 }
  83
  84 void DialogClientView::UpdateDialogButtons() {
  85   const int buttons = GetDialogDelegate()->GetDialogButtons();
  86   ui::Accelerator escape(ui::VKEY_ESCAPE, ui::EF_NONE);
  87   if (default_button_)
  88     default_button_->SetIsDefault(false);
  89   default_button_ = NULL;
  90
  91   if (buttons & ui::DIALOG_BUTTON_OK) {
  92     if (!ok_button_) {
  93       ok_button_ = CreateDialogButton(ui::DIALOG_BUTTON_OK);
  94       if (!(buttons & ui::DIALOG_BUTTON_CANCEL))
  95         ok_button_->AddAccelerator(escape);
  96       AddChildView(ok_button_);
  97     }
  98
  99     UpdateButton(ok_button_, ui::DIALOG_BUTTON_OK);
 100   } else if (ok_button_) {
 101     delete ok_button_;
 102     ok_button_ = NULL;
 103   }
 104
 105   if (buttons & ui::DIALOG_BUTTON_CANCEL) {
 106     if (!cancel_button_) {
 107       cancel_button_ = CreateDialogButton(ui::DIALOG_BUTTON_CANCEL);
 108       cancel_button_->AddAccelerator(escape);
 109       AddChildView(cancel_button_);
 110     }
 111
 112     UpdateButton(cancel_button_, ui::DIALOG_BUTTON_CANCEL);
 113   } else if (cancel_button_) {
 114     delete cancel_button_;
 115     cancel_button_ = NULL;
 116   }
 117
 118   // Use the escape key to close the window if there are no dialog buttons.
 119   if (!has_dialog_buttons())
 120     AddAccelerator(escape);
 121   else
 122     ResetAccelerators();
 123 }
 124
 125 ///////////////////////////////////////////////////////////////////////////////
 126 // DialogClientView, ClientView overrides:
 127
 128 bool DialogClientView::CanClose() {
 129   if (notified_delegate_)
 130     return true;
 131
 132   // The dialog is closing but no Accept or Cancel action has been performed
 133   // before: it's a Close action.
 134   if (GetDialogDelegate()->Close()) {
 135     notified_delegate_ = true;
 136     GetDialogDelegate()->OnClosed();
 137     return true;
 138   }
 139   return false;
 140 }
 141
 142 DialogClientView* DialogClientView::AsDialogClientView() {
 143   return this;
 144 }
 145
 146 const DialogClientView* DialogClientView::AsDialogClientView() const {
 147   return this;
 148 }
 149
 150 void DialogClientView::OnWillChangeFocus(View* focused_before,
 151                                          View* focused_now) {
 152   // Make the newly focused button default or restore the dialog's default.
 153   const int default_button = GetDialogDelegate()->GetDefaultDialogButton();
 154   LabelButton* new_default_button = NULL;
 155   if (focused_now &&
 156       !strcmp(focused_now->GetClassName(), LabelButton::kViewClassName)) {
 157     new_default_button = static_cast<LabelButton*>(focused_now);
 158   } else if (default_button == ui::DIALOG_BUTTON_OK && ok_button_) {
 159     new_default_button = ok_button_;
 160   } else if (default_button == ui::DIALOG_BUTTON_CANCEL && cancel_button_) {
 161     new_default_button = cancel_button_;
 162   }
 163
 164   if (default_button_ && default_button_ != new_default_button)
 165     default_button_->SetIsDefault(false);
 166   default_button_ = new_default_button;
 167   if (default_button_ && !default_button_->is_default())
 168     default_button_->SetIsDefault(true);
 169 }
 170
 171 void DialogClientView::OnDidChangeFocus(View* focused_before,
 172                                         View* focused_now) {
 173 }
 174
 175 ////////////////////////////////////////////////////////////////////////////////
 176 // DialogClientView, View overrides:
 177
 178 gfx::Size DialogClientView::GetPreferredSize() {
 179   // Initialize the size to fit the buttons and extra view row.
 180   gfx::Size size(
 181       (ok_button_ ? ok_button_->GetPreferredSize().width() : 0) +
 182       (cancel_button_ ? cancel_button_->GetPreferredSize().width() : 0) +
 183       (cancel_button_ && ok_button_ ? kRelatedButtonHSpacing : 0) +
 184       (ShouldShow(extra_view_) ? extra_view_->GetPreferredSize().width() : 0) +
 185       (ShouldShow(extra_view_) && has_dialog_buttons() ?
 186            kRelatedButtonHSpacing : 0),
 187       0);
 188
 189   int buttons_height = GetButtonsAndExtraViewRowHeight();
 190   if (buttons_height != 0) {
 191     size.Enlarge(0, buttons_height + kRelatedControlVerticalSpacing);
 192     // Inset the buttons and extra view.
 193     const gfx::Insets insets = GetButtonRowInsets();
 194     size.Enlarge(insets.width(), insets.height());
 195   }
 196
 197   // Increase the size as needed to fit the contents view.
 198   // NOTE: The contents view is not inset on the top or side client view edges.
 199   gfx::Size contents_size = contents_view()->GetPreferredSize();
 200   size.Enlarge(0, contents_size.height());
 201   size.set_width(std::max(size.width(), contents_size.width()));
 202
 203   // Increase the size as needed to fit the footnote view.
 204   if (ShouldShow(footnote_view_)) {
 205     gfx::Size footnote_size = footnote_view_->GetPreferredSize();
 206     if (!footnote_size.IsEmpty())
 207       size.set_width(std::max(size.width(), footnote_size.width()));
 208
 209     int footnote_height = footnote_view_->GetHeightForWidth(size.width());
 210     size.Enlarge(0, footnote_height);
 211   }
 212
 213   return size;
 214 }
 215
 216 void DialogClientView::Layout() {
 217   gfx::Rect bounds = GetContentsBounds();
 218
 219   // Layout the footnote view.
 220   if (ShouldShow(footnote_view_)) {
 221     const int height = footnote_view_->GetHeightForWidth(bounds.width());
 222     footnote_view_->SetBounds(bounds.x(), bounds.bottom() - height,
 223                               bounds.width(), height);
 224     if (height != 0)
 225       bounds.Inset(0, 0, 0, height);
 226   }
 227
 228   // Layout the row containing the buttons and the extra view.
 229   if (has_dialog_buttons() || ShouldShow(extra_view_)) {
 230     bounds.Inset(GetButtonRowInsets());
 231     const int height = GetButtonsAndExtraViewRowHeight();
 232     gfx::Rect row_bounds(bounds.x(), bounds.bottom() - height,
 233                          bounds.width(), height);
 234     if (kIsOkButtonOnLeftSide) {
 235       LayoutButton(cancel_button_, &row_bounds);
 236       LayoutButton(ok_button_, &row_bounds);
 237     } else {
 238       LayoutButton(ok_button_, &row_bounds);
 239       LayoutButton(cancel_button_, &row_bounds);
 240     }
 241     if (extra_view_) {
 242       row_bounds.set_width(std::min(row_bounds.width(),
 243           extra_view_->GetPreferredSize().width()));
 244       extra_view_->SetBoundsRect(row_bounds);
 245     }
 246
 247     if (height > 0)
 248       bounds.Inset(0, 0, 0, height + kRelatedControlVerticalSpacing);
 249   }
 250
 251   // Layout the contents view to the top and side edges of the contents bounds.
 252   // NOTE: The local insets do not apply to the contents view sides or top.
 253   const gfx::Rect contents_bounds = GetContentsBounds();
 254   contents_view()->SetBounds(contents_bounds.x(), contents_bounds.y(),
 255       contents_bounds.width(), bounds.bottom() - contents_bounds.y());
 256 }
 257
 258 bool DialogClientView::AcceleratorPressed(const ui::Accelerator& accelerator) {
 259   DCHECK_EQ(accelerator.key_code(), ui::VKEY_ESCAPE);
 260   Close();
 261   return true;
 262 }
 263
 264 void DialogClientView::ViewHierarchyChanged(
 265     const ViewHierarchyChangedDetails& details) {
 266   ClientView::ViewHierarchyChanged(details);
 267   if (details.is_add && details.child == this) {
 268     // The old dialog style needs an explicit background color, while the new
 269     // dialog style simply inherits the bubble's frame view color.
 270     const DialogDelegate* dialog = GetDialogDelegate();
 271     if (dialog && !dialog->UseNewStyleForThisDialog())
 272       set_background(views::Background::CreateSolidBackground(GetNativeTheme()->
 273           GetSystemColor(ui::NativeTheme::kColorId_DialogBackground)));
 274
 275     focus_manager_ = GetFocusManager();
 276     if (focus_manager_)
 277       GetFocusManager()->AddFocusChangeListener(this);
 278
 279     UpdateDialogButtons();
 280     CreateExtraView();
 281     CreateFootnoteView();
 282   } else if (!details.is_add && details.child == this) {
 283     if (focus_manager_)
 284       focus_manager_->RemoveFocusChangeListener(this);
 285     focus_manager_ = NULL;
 286   } else if (!details.is_add) {
 287     if (details.child == default_button_)
 288       default_button_ = NULL;
 289     if (details.child == ok_button_)
 290       ok_button_ = NULL;
 291     if (details.child == cancel_button_)
 292       cancel_button_ = NULL;
 293   }
 294 }
 295
 296 void DialogClientView::NativeViewHierarchyChanged() {
 297   FocusManager* focus_manager = GetFocusManager();
 298   if (focus_manager_ != focus_manager) {
 299     if (focus_manager_)
 300       focus_manager_->RemoveFocusChangeListener(this);
 301     focus_manager_ = focus_manager;
 302     if (focus_manager_)
 303       focus_manager_->AddFocusChangeListener(this);
 304   }
 305 }
 306
 307 ////////////////////////////////////////////////////////////////////////////////
 308 // DialogClientView, ButtonListener implementation:
 309
 310 void DialogClientView::ButtonPressed(Button* sender, const ui::Event& event) {
 311   // Check for a valid delegate to avoid handling events after destruction.
 312   if (!GetDialogDelegate())
 313     return;
 314
 315   if (sender == ok_button_)
 316     AcceptWindow();
 317   else if (sender == cancel_button_)
 318     CancelWindow();
 319   else
 320     NOTREACHED();
 321 }
 322
 323 ////////////////////////////////////////////////////////////////////////////////
 324 // DialogClientView, protected:
 325
 326 DialogClientView::DialogClientView(View* contents_view)
 327     : ClientView(NULL, contents_view),
 328       ok_button_(NULL),
 329       cancel_button_(NULL),
 330       default_button_(NULL),
 331       focus_manager_(NULL),
 332       extra_view_(NULL),
 333       footnote_view_(NULL),
 334       notified_delegate_(false) {}
 335
 336 DialogDelegate* DialogClientView::GetDialogDelegate() const {
 337   return GetWidget()->widget_delegate()->AsDialogDelegate();
 338 }
 339
 340 void DialogClientView::CreateExtraView() {
 341   if (extra_view_)
 342     return;
 343
 344   extra_view_ = GetDialogDelegate()->CreateExtraView();
 345   if (extra_view_) {
 346     extra_view_->SetGroup(kButtonGroup);
 347     AddChildView(extra_view_);
 348   }
 349 }
 350
 351 void DialogClientView::CreateFootnoteView() {
 352   if (footnote_view_)
 353     return;
 354
 355   footnote_view_ = GetDialogDelegate()->CreateFootnoteView();
 356   if (footnote_view_)
 357     AddChildView(footnote_view_);
 358 }
 359
 360 void DialogClientView::ChildPreferredSizeChanged(View* child) {
 361   if (child == footnote_view_ || child == extra_view_)
 362     Layout();
 363 }
 364
 365 void DialogClientView::ChildVisibilityChanged(View* child) {
 366   ChildPreferredSizeChanged(child);
 367 }
 368
 369 ////////////////////////////////////////////////////////////////////////////////
 370 // DialogClientView, private:
 371
 372 LabelButton* DialogClientView::CreateDialogButton(ui::DialogButton type) {
 373   const base::string16 title = GetDialogDelegate()->GetDialogButtonLabel(type);
 374   LabelButton* button = NULL;
 375   if (GetDialogDelegate()->UseNewStyleForThisDialog() &&
 376       GetDialogDelegate()->GetDefaultDialogButton() == type &&
 377       GetDialogDelegate()->ShouldDefaultButtonBeBlue()) {
 378     button = new BlueButton(this, title);
 379   } else {
 380     button = new LabelButton(this, title);
 381     button->SetStyle(Button::STYLE_BUTTON);
 382   }
 383   button->SetFocusable(true);
 384
 385   const int kDialogMinButtonWidth = 75;
 386   button->set_min_width(kDialogMinButtonWidth);
 387   button->SetGroup(kButtonGroup);
 388   return button;
 389 }
 390
 391 void DialogClientView::UpdateButton(LabelButton* button,
 392                                     ui::DialogButton type) {
 393   DialogDelegate* dialog = GetDialogDelegate();
 394   button->SetText(dialog->GetDialogButtonLabel(type));
 395   button->SetEnabled(dialog->IsDialogButtonEnabled(type));
 396
 397   if (type == dialog->GetDefaultDialogButton()) {
 398     default_button_ = button;
 399     button->SetIsDefault(true);
 400   }
 401 }
 402
 403 int DialogClientView::GetButtonsAndExtraViewRowHeight() const {
 404   int extra_view_height = ShouldShow(extra_view_) ?
 405       extra_view_->GetPreferredSize().height() : 0;
 406   int buttons_height = std::max(
 407       ok_button_ ? ok_button_->GetPreferredSize().height() : 0,
 408       cancel_button_ ? cancel_button_->GetPreferredSize().height() : 0);
 409   return std::max(extra_view_height, buttons_height);
 410 }
 411
 412 gfx::Insets DialogClientView::GetButtonRowInsets() const {
 413   // NOTE: The insets only apply to the buttons, extra view, and footnote view.
 414   return GetButtonsAndExtraViewRowHeight() == 0 ? gfx::Insets() :
 415       gfx::Insets(0, kButtonHEdgeMarginNew,
 416                   kButtonVEdgeMarginNew, kButtonHEdgeMarginNew);
 417 }
 418
 419 void DialogClientView::Close() {
 420   GetWidget()->Close();
 421   GetDialogDelegate()->OnClosed();
 422 }
 423
 424 }  // namespace views