ui/views/bubble/tray_bubble_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/bubble/tray_bubble_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "third_party/skia/include/core/SkCanvas.h"
  10 #include "third_party/skia/include/core/SkColor.h"
  11 #include "third_party/skia/include/core/SkPaint.h"
  12 #include "third_party/skia/include/core/SkPath.h"
  13 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
  14 #include "ui/accessibility/ax_view_state.h"
  15 #include "ui/aura/window.h"
  16 #include "ui/compositor/layer.h"
  17 #include "ui/compositor/layer_delegate.h"
  18 #include "ui/events/event.h"
  19 #include "ui/gfx/canvas.h"
  20 #include "ui/gfx/insets.h"
  21 #include "ui/gfx/path.h"
  22 #include "ui/gfx/rect.h"
  23 #include "ui/gfx/skia_util.h"
  24 #include "ui/views/bubble/bubble_frame_view.h"
  25 #include "ui/views/bubble/bubble_window_targeter.h"
  26 #include "ui/views/layout/box_layout.h"
  27 #include "ui/views/widget/widget.h"
  28
  29 namespace {
  30
  31 // Inset the arrow a bit from the edge.
  32 const int kArrowMinOffset = 20;
  33 const int kBubbleSpacing = 20;
  34
  35 // The new theme adjusts the menus / bubbles to be flush with the shelf when
  36 // there is no bubble. These are the offsets which need to be applied.
  37 const int kArrowOffsetTopBottom = 4;
  38 const int kArrowOffsetLeft = 9;
  39 const int kArrowOffsetRight = -5;
  40 const int kOffsetLeftRightForTopBottomOrientation = 5;
  41
  42 // The sampling time for mouse position changes in ms - which is roughly a frame
  43 // time.
  44 const int kFrameTimeInMS = 30;
  45 }  // namespace
  46
  47 namespace views {
  48
  49 namespace internal {
  50
  51 // Detects any mouse movement. This is needed to detect mouse movements by the
  52 // user over the bubble if the bubble got created underneath the cursor.
  53 class MouseMoveDetectorHost : public MouseWatcherHost {
  54  public:
  55   MouseMoveDetectorHost();
  56   ~MouseMoveDetectorHost() override;
  57
  58   bool Contains(const gfx::Point& screen_point, MouseEventType type) override;
  59
  60  private:
  61   DISALLOW_COPY_AND_ASSIGN(MouseMoveDetectorHost);
  62 };
  63
  64 MouseMoveDetectorHost::MouseMoveDetectorHost() {
  65 }
  66
  67 MouseMoveDetectorHost::~MouseMoveDetectorHost() {
  68 }
  69
  70 bool MouseMoveDetectorHost::Contains(const gfx::Point& screen_point,
  71                                      MouseEventType type) {
  72   return false;
  73 }
  74
  75 // Custom border for TrayBubbleView. Contains special logic for GetBounds()
  76 // to stack bubbles with no arrows correctly. Also calculates the arrow offset.
  77 class TrayBubbleBorder : public BubbleBorder {
  78  public:
  79   TrayBubbleBorder(View* owner,
  80                    View* anchor,
  81                    TrayBubbleView::InitParams params)
  82       : BubbleBorder(params.arrow, params.shadow, params.arrow_color),
  83         owner_(owner),
  84         anchor_(anchor),
  85         tray_arrow_offset_(params.arrow_offset),
  86         first_item_has_no_margin_(params.first_item_has_no_margin) {
  87     set_alignment(params.arrow_alignment);
  88     set_background_color(params.arrow_color);
  89     set_paint_arrow(params.arrow_paint_type);
  90   }
  91
  92   ~TrayBubbleBorder() override {}
  93
  94   // Overridden from BubbleBorder.
  95   // Sets the bubble on top of the anchor when it has no arrow.
  96   gfx::Rect GetBounds(const gfx::Rect& position_relative_to,
  97                       const gfx::Size& contents_size) const override {
  98     if (has_arrow(arrow())) {
  99       gfx::Rect rect =
 100           BubbleBorder::GetBounds(position_relative_to, contents_size);
 101       if (first_item_has_no_margin_) {
 102         if (arrow() == BubbleBorder::BOTTOM_RIGHT ||
 103             arrow() == BubbleBorder::BOTTOM_LEFT) {
 104           rect.set_y(rect.y() + kArrowOffsetTopBottom);
 105           int rtl_factor = base::i18n::IsRTL() ? -1 : 1;
 106           rect.set_x(rect.x() +
 107                      rtl_factor * kOffsetLeftRightForTopBottomOrientation);
 108         } else if (arrow() == BubbleBorder::LEFT_BOTTOM) {
 109           rect.set_x(rect.x() + kArrowOffsetLeft);
 110         } else if (arrow() == BubbleBorder::RIGHT_BOTTOM) {
 111           rect.set_x(rect.x() + kArrowOffsetRight);
 112         }
 113       }
 114       return rect;
 115     }
 116
 117     gfx::Size border_size(contents_size);
 118     gfx::Insets insets = GetInsets();
 119     border_size.Enlarge(insets.width(), insets.height());
 120     const int x = position_relative_to.x() +
 121         position_relative_to.width() / 2 - border_size.width() / 2;
 122     // Position the bubble on top of the anchor.
 123     const int y = position_relative_to.y() - border_size.height() +
 124         insets.height() - kBubbleSpacing;
 125     return gfx::Rect(x, y, border_size.width(), border_size.height());
 126   }
 127
 128   void UpdateArrowOffset() {
 129     int arrow_offset = 0;
 130     if (arrow() == BubbleBorder::BOTTOM_RIGHT ||
 131         arrow() == BubbleBorder::BOTTOM_LEFT) {
 132       // Note: tray_arrow_offset_ is relative to the anchor widget.
 133       if (tray_arrow_offset_ ==
 134           TrayBubbleView::InitParams::kArrowDefaultOffset) {
 135         arrow_offset = kArrowMinOffset;
 136       } else {
 137         const int width = owner_->GetWidget()->GetContentsView()->width();
 138         gfx::Point pt(tray_arrow_offset_, 0);
 139         View::ConvertPointToScreen(anchor_->GetWidget()->GetRootView(), &pt);
 140         View::ConvertPointFromScreen(owner_->GetWidget()->GetRootView(), &pt);
 141         arrow_offset = pt.x();
 142         if (arrow() == BubbleBorder::BOTTOM_RIGHT)
 143           arrow_offset = width - arrow_offset;
 144         arrow_offset = std::max(arrow_offset, kArrowMinOffset);
 145       }
 146     } else {
 147       if (tray_arrow_offset_ ==
 148           TrayBubbleView::InitParams::kArrowDefaultOffset) {
 149         arrow_offset = kArrowMinOffset;
 150       } else {
 151         gfx::Point pt(0, tray_arrow_offset_);
 152         View::ConvertPointToScreen(anchor_->GetWidget()->GetRootView(), &pt);
 153         View::ConvertPointFromScreen(owner_->GetWidget()->GetRootView(), &pt);
 154         arrow_offset = pt.y();
 155         arrow_offset = std::max(arrow_offset, kArrowMinOffset);
 156       }
 157     }
 158     set_arrow_offset(arrow_offset);
 159   }
 160
 161  private:
 162   View* owner_;
 163   View* anchor_;
 164   const int tray_arrow_offset_;
 165
 166   // If true the first item should not get any additional spacing against the
 167   // anchor (without the bubble tip the bubble should be flush to the shelf).
 168   const bool first_item_has_no_margin_;
 169
 170   DISALLOW_COPY_AND_ASSIGN(TrayBubbleBorder);
 171 };
 172
 173 // This mask layer clips the bubble's content so that it does not overwrite the
 174 // rounded bubble corners.
 175 // TODO(miket): This does not work on Windows. Implement layer masking or
 176 // alternate solutions if the TrayBubbleView is needed there in the future.
 177 class TrayBubbleContentMask : public ui::LayerDelegate {
 178  public:
 179   explicit TrayBubbleContentMask(int corner_radius);
 180   ~TrayBubbleContentMask() override;
 181
 182   ui::Layer* layer() { return &layer_; }
 183
 184   // Overridden from LayerDelegate.
 185   void OnPaintLayer(gfx::Canvas* canvas) override;
 186   void OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) override {}
 187   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
 188   base::Closure PrepareForLayerBoundsChange() override;
 189
 190  private:
 191   ui::Layer layer_;
 192   int corner_radius_;
 193
 194   DISALLOW_COPY_AND_ASSIGN(TrayBubbleContentMask);
 195 };
 196
 197 TrayBubbleContentMask::TrayBubbleContentMask(int corner_radius)
 198     : layer_(ui::LAYER_TEXTURED),
 199       corner_radius_(corner_radius) {
 200   layer_.set_delegate(this);
 201 }
 202
 203 TrayBubbleContentMask::~TrayBubbleContentMask() {
 204   layer_.set_delegate(NULL);
 205 }
 206
 207 void TrayBubbleContentMask::OnPaintLayer(gfx::Canvas* canvas) {
 208   SkPaint paint;
 209   paint.setAlpha(255);
 210   paint.setStyle(SkPaint::kFill_Style);
 211   gfx::Rect rect(layer()->bounds().size());
 212   canvas->DrawRoundRect(rect, corner_radius_, paint);
 213 }
 214
 215 void TrayBubbleContentMask::OnDeviceScaleFactorChanged(
 216     float device_scale_factor) {
 217   // Redrawing will take care of scale factor change.
 218 }
 219
 220 base::Closure TrayBubbleContentMask::PrepareForLayerBoundsChange() {
 221   return base::Closure();
 222 }
 223
 224 // Custom layout for the bubble-view. Does the default box-layout if there is
 225 // enough height. Otherwise, makes sure the bottom rows are visible.
 226 class BottomAlignedBoxLayout : public BoxLayout {
 227  public:
 228   explicit BottomAlignedBoxLayout(TrayBubbleView* bubble_view)
 229       : BoxLayout(BoxLayout::kVertical, 0, 0, 0),
 230         bubble_view_(bubble_view) {
 231   }
 232
 233   ~BottomAlignedBoxLayout() override {}
 234
 235  private:
 236   void Layout(View* host) override {
 237     if (host->height() >= host->GetPreferredSize().height() ||
 238         !bubble_view_->is_gesture_dragging()) {
 239       BoxLayout::Layout(host);
 240       return;
 241     }
 242
 243     int consumed_height = 0;
 244     for (int i = host->child_count() - 1;
 245         i >= 0 && consumed_height < host->height(); --i) {
 246       View* child = host->child_at(i);
 247       if (!child->visible())
 248         continue;
 249       gfx::Size size = child->GetPreferredSize();
 250       child->SetBounds(0, host->height() - consumed_height - size.height(),
 251           host->width(), size.height());
 252       consumed_height += size.height();
 253     }
 254   }
 255
 256   TrayBubbleView* bubble_view_;
 257
 258   DISALLOW_COPY_AND_ASSIGN(BottomAlignedBoxLayout);
 259 };
 260
 261 }  // namespace internal
 262
 263 using internal::TrayBubbleBorder;
 264 using internal::TrayBubbleContentMask;
 265 using internal::BottomAlignedBoxLayout;
 266
 267 // static
 268 const int TrayBubbleView::InitParams::kArrowDefaultOffset = -1;
 269
 270 TrayBubbleView::InitParams::InitParams(AnchorType anchor_type,
 271                                        AnchorAlignment anchor_alignment,
 272                                        int min_width,
 273                                        int max_width)
 274     : anchor_type(anchor_type),
 275       anchor_alignment(anchor_alignment),
 276       min_width(min_width),
 277       max_width(max_width),
 278       max_height(0),
 279       can_activate(false),
 280       close_on_deactivate(true),
 281       arrow_color(SK_ColorBLACK),
 282       first_item_has_no_margin(false),
 283       arrow(BubbleBorder::NONE),
 284       arrow_offset(kArrowDefaultOffset),
 285       arrow_paint_type(BubbleBorder::PAINT_NORMAL),
 286       shadow(BubbleBorder::BIG_SHADOW),
 287       arrow_alignment(BubbleBorder::ALIGN_EDGE_TO_ANCHOR_EDGE) {
 288 }
 289
 290 // static
 291 TrayBubbleView* TrayBubbleView::Create(gfx::NativeView parent_window,
 292                                        View* anchor,
 293                                        Delegate* delegate,
 294                                        InitParams* init_params) {
 295   // Set arrow here so that it can be passed to the BubbleView constructor.
 296   if (init_params->anchor_type == ANCHOR_TYPE_TRAY) {
 297     if (init_params->anchor_alignment == ANCHOR_ALIGNMENT_BOTTOM) {
 298       init_params->arrow = base::i18n::IsRTL() ?
 299           BubbleBorder::BOTTOM_LEFT : BubbleBorder::BOTTOM_RIGHT;
 300     } else if (init_params->anchor_alignment == ANCHOR_ALIGNMENT_TOP) {
 301       init_params->arrow = BubbleBorder::TOP_LEFT;
 302     } else if (init_params->anchor_alignment == ANCHOR_ALIGNMENT_LEFT) {
 303       init_params->arrow = BubbleBorder::LEFT_BOTTOM;
 304     } else {
 305       init_params->arrow = BubbleBorder::RIGHT_BOTTOM;
 306     }
 307   } else {
 308     init_params->arrow = BubbleBorder::NONE;
 309   }
 310
 311   return new TrayBubbleView(parent_window, anchor, delegate, *init_params);
 312 }
 313
 314 TrayBubbleView::TrayBubbleView(gfx::NativeView parent_window,
 315                                View* anchor,
 316                                Delegate* delegate,
 317                                const InitParams& init_params)
 318     : BubbleDelegateView(anchor, init_params.arrow),
 319       params_(init_params),
 320       delegate_(delegate),
 321       preferred_width_(init_params.min_width),
 322       bubble_border_(NULL),
 323       is_gesture_dragging_(false),
 324       mouse_actively_entered_(false) {
 325   set_parent_window(parent_window);
 326   set_notify_enter_exit_on_child(true);
 327   set_close_on_deactivate(init_params.close_on_deactivate);
 328   set_margins(gfx::Insets());
 329   bubble_border_ = new TrayBubbleBorder(this, GetAnchorView(), params_);
 330   SetPaintToLayer(true);
 331   SetFillsBoundsOpaquely(true);
 332
 333   bubble_content_mask_.reset(
 334       new TrayBubbleContentMask(bubble_border_->GetBorderCornerRadius()));
 335 }
 336
 337 TrayBubbleView::~TrayBubbleView() {
 338   mouse_watcher_.reset();
 339   // Inform host items (models) that their views are being destroyed.
 340   if (delegate_)
 341     delegate_->BubbleViewDestroyed();
 342 }
 343
 344 void TrayBubbleView::InitializeAndShowBubble() {
 345   // Must occur after call to BubbleDelegateView::CreateBubble().
 346   SetAlignment(params_.arrow_alignment);
 347   bubble_border_->UpdateArrowOffset();
 348
 349   layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
 350
 351   GetWidget()->Show();
 352   GetWidget()->GetNativeWindow()->SetEventTargeter(
 353       scoped_ptr<ui::EventTargeter>(new BubbleWindowTargeter(this)));
 354   UpdateBubble();
 355 }
 356
 357 void TrayBubbleView::UpdateBubble() {
 358   SizeToContents();
 359   bubble_content_mask_->layer()->SetBounds(layer()->bounds());
 360   GetWidget()->GetRootView()->SchedulePaint();
 361 }
 362
 363 void TrayBubbleView::SetMaxHeight(int height) {
 364   params_.max_height = height;
 365   if (GetWidget())
 366     SizeToContents();
 367 }
 368
 369 void TrayBubbleView::SetWidth(int width) {
 370   width = std::max(std::min(width, params_.max_width), params_.min_width);
 371   if (preferred_width_ == width)
 372     return;
 373   preferred_width_ = width;
 374   if (GetWidget())
 375     SizeToContents();
 376 }
 377
 378 void TrayBubbleView::SetArrowPaintType(
 379     views::BubbleBorder::ArrowPaintType paint_type) {
 380   bubble_border_->set_paint_arrow(paint_type);
 381   UpdateBubble();
 382 }
 383
 384 gfx::Insets TrayBubbleView::GetBorderInsets() const {
 385   return bubble_border_->GetInsets();
 386 }
 387
 388 void TrayBubbleView::Init() {
 389   BoxLayout* layout = new BottomAlignedBoxLayout(this);
 390   layout->SetDefaultFlex(1);
 391   SetLayoutManager(layout);
 392 }
 393
 394 gfx::Rect TrayBubbleView::GetAnchorRect() const {
 395   if (!delegate_)
 396     return gfx::Rect();
 397   return delegate_->GetAnchorRect(anchor_widget(),
 398                                   params_.anchor_type,
 399                                   params_.anchor_alignment);
 400 }
 401
 402 bool TrayBubbleView::CanActivate() const {
 403   return params_.can_activate;
 404 }
 405
 406 NonClientFrameView* TrayBubbleView::CreateNonClientFrameView(Widget* widget) {
 407   BubbleFrameView* frame = new BubbleFrameView(margins());
 408   frame->SetBubbleBorder(scoped_ptr<views::BubbleBorder>(bubble_border_));
 409   return frame;
 410 }
 411
 412 bool TrayBubbleView::WidgetHasHitTestMask() const {
 413   return true;
 414 }
 415
 416 void TrayBubbleView::GetWidgetHitTestMask(gfx::Path* mask) const {
 417   DCHECK(mask);
 418   mask->addRect(gfx::RectToSkRect(GetBubbleFrameView()->GetContentsBounds()));
 419 }
 420
 421 gfx::Size TrayBubbleView::GetPreferredSize() const {
 422   return gfx::Size(preferred_width_, GetHeightForWidth(preferred_width_));
 423 }
 424
 425 gfx::Size TrayBubbleView::GetMaximumSize() const {
 426   gfx::Size size = GetPreferredSize();
 427   size.set_width(params_.max_width);
 428   return size;
 429 }
 430
 431 int TrayBubbleView::GetHeightForWidth(int width) const {
 432   int height = GetInsets().height();
 433   width = std::max(width - GetInsets().width(), 0);
 434   for (int i = 0; i < child_count(); ++i) {
 435     const View* child = child_at(i);
 436     if (child->visible())
 437       height += child->GetHeightForWidth(width);
 438   }
 439
 440   return (params_.max_height != 0) ?
 441       std::min(height, params_.max_height) : height;
 442 }
 443
 444 void TrayBubbleView::OnMouseEntered(const ui::MouseEvent& event) {
 445   mouse_watcher_.reset();
 446   if (delegate_ && !(event.flags() & ui::EF_IS_SYNTHESIZED)) {
 447     // Coming here the user was actively moving the mouse over the bubble and
 448     // we inform the delegate that we entered. This will prevent the bubble
 449     // to auto close.
 450     delegate_->OnMouseEnteredView();
 451     mouse_actively_entered_ = true;
 452   } else {
 453     // Coming here the bubble got shown and the mouse was 'accidentally' over it
 454     // which is not a reason to prevent the bubble to auto close. As such we
 455     // do not call the delegate, but wait for the first mouse move within the
 456     // bubble. The used MouseWatcher will notify use of a movement and call
 457     // |MouseMovedOutOfHost|.
 458     mouse_watcher_.reset(new MouseWatcher(
 459         new views::internal::MouseMoveDetectorHost(),
 460         this));
 461     // Set the mouse sampling frequency to roughly a frame time so that the user
 462     // cannot see a lag.
 463     mouse_watcher_->set_notify_on_exit_time(
 464         base::TimeDelta::FromMilliseconds(kFrameTimeInMS));
 465     mouse_watcher_->Start();
 466   }
 467 }
 468
 469 void TrayBubbleView::OnMouseExited(const ui::MouseEvent& event) {
 470   // If there was a mouse watcher waiting for mouse movements we disable it
 471   // immediately since we now leave the bubble.
 472   mouse_watcher_.reset();
 473   // Do not notify the delegate of an exit if we never told it that we entered.
 474   if (delegate_ && mouse_actively_entered_)
 475     delegate_->OnMouseExitedView();
 476 }
 477
 478 void TrayBubbleView::GetAccessibleState(ui::AXViewState* state) {
 479   if (delegate_ && params_.can_activate) {
 480     state->role = ui::AX_ROLE_WINDOW;
 481     state->name = delegate_->GetAccessibleNameForBubble();
 482   }
 483 }
 484
 485 void TrayBubbleView::MouseMovedOutOfHost() {
 486   // The mouse was accidentally over the bubble when it opened and the AutoClose
 487   // logic was not activated. Now that the user did move the mouse we tell the
 488   // delegate to disable AutoClose.
 489   delegate_->OnMouseEnteredView();
 490   mouse_actively_entered_ = true;
 491   mouse_watcher_->Stop();
 492 }
 493
 494 void TrayBubbleView::ChildPreferredSizeChanged(View* child) {
 495   SizeToContents();
 496 }
 497
 498 void TrayBubbleView::ViewHierarchyChanged(
 499     const ViewHierarchyChangedDetails& details) {
 500   if (details.is_add && details.child == this) {
 501     details.parent->SetPaintToLayer(true);
 502     details.parent->SetFillsBoundsOpaquely(true);
 503     details.parent->layer()->SetMasksToBounds(true);
 504   }
 505 }
 506
 507 }  // namespace views