| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/views/view.h" |
| |
| #include <algorithm> |
| |
| #ifndef NDEBUG |
| #include <iostream> |
| #endif |
| |
| #include "base/logging.h" |
| #include "base/message_loop.h" |
| #include "base/scoped_handle.h" |
| #include "base/string_util.h" |
| #include "chrome/common/drag_drop_types.h" |
| #include "chrome/common/gfx/chrome_canvas.h" |
| #include "chrome/common/gfx/path.h" |
| #include "chrome/common/l10n_util.h" |
| #include "chrome/common/os_exchange_data.h" |
| #include "chrome/views/accessibility/accessible_wrapper.h" |
| #include "chrome/views/background.h" |
| #include "chrome/views/border.h" |
| #include "chrome/views/layout_manager.h" |
| #include "chrome/views/root_view.h" |
| #include "chrome/views/tooltip_manager.h" |
| #include "chrome/views/widget.h" |
| #include "SkShader.h" |
| |
| namespace views { |
| |
| // static |
| char View::kViewClassName[] = "chrome/views/View"; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // A task used to automatically restore focus on the last focused floating view |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| class RestoreFocusTask : public Task { |
| public: |
| explicit RestoreFocusTask(View* target) : view_(target) { |
| } |
| |
| ~RestoreFocusTask() {} |
| |
| void Cancel() { |
| view_ = NULL; |
| } |
| |
| void Run() { |
| if (view_) |
| view_->RestoreFloatingViewFocus(); |
| } |
| private: |
| // The target view. |
| View* view_; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(RestoreFocusTask); |
| }; |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - constructors, destructors, initialization |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| View::View() |
| : id_(0), |
| group_(-1), |
| bounds_(0,0,0,0), |
| parent_(NULL), |
| enabled_(true), |
| is_visible_(true), |
| focusable_(false), |
| accessibility_(NULL), |
| is_parent_owned_(true), |
| notify_when_visible_bounds_in_root_changes_(false), |
| registered_for_visible_bounds_notification_(false), |
| next_focusable_view_(NULL), |
| previous_focusable_view_(NULL), |
| should_restore_focus_(false), |
| restore_focus_view_task_(NULL), |
| context_menu_controller_(NULL), |
| drag_controller_(NULL), |
| ui_mirroring_is_enabled_for_rtl_languages_(true), |
| flip_canvas_on_paint_for_rtl_ui_(false) { |
| } |
| |
| View::~View() { |
| if (restore_focus_view_task_) |
| restore_focus_view_task_->Cancel(); |
| |
| int c = static_cast<int>(child_views_.size()); |
| while (--c >= 0) { |
| if (child_views_[c]->IsParentOwned()) |
| delete child_views_[c]; |
| else |
| child_views_[c]->SetParent(NULL); |
| } |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - sizing |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| gfx::Rect View::GetBounds(PositionMirroringSettings settings) const { |
| gfx::Rect bounds(bounds_); |
| |
| // If the parent uses an RTL UI layout and if we are asked to transform the |
| // bounds to their mirrored position if necessary, then we should shift the |
| // rectangle appropriately. |
| if (settings == APPLY_MIRRORING_TRANSFORMATION) |
| bounds.set_x(MirroredX()); |
| |
| return bounds; |
| } |
| |
| // y(), width() and height() are agnostic to the RTL UI layout of the |
| // parent view. x(), on the other hand, is not. |
| int View::GetX(PositionMirroringSettings settings) const { |
| return settings == IGNORE_MIRRORING_TRANSFORMATION ? x() : MirroredX(); |
| } |
| |
| void View::SetBounds(const gfx::Rect& bounds) { |
| if (bounds == bounds_) |
| return; |
| |
| gfx::Rect prev = bounds_; |
| bounds_ = bounds; |
| DidChangeBounds(prev, bounds_); |
| |
| RootView* root = GetRootView(); |
| if (root) { |
| bool size_changed = prev.size() != bounds_.size(); |
| bool position_changed = prev.origin() != bounds_.origin(); |
| if (size_changed || position_changed) |
| root->ViewBoundsChanged(this, size_changed, position_changed); |
| } |
| } |
| |
| gfx::Rect View::GetLocalBounds(bool include_border) const { |
| if (include_border || !border_.get()) |
| return gfx::Rect(0, 0, width(), height()); |
| |
| gfx::Insets insets; |
| border_->GetInsets(&insets); |
| return gfx::Rect(insets.left(), insets.top(), |
| width() - insets.width(), height() - insets.height()); |
| } |
| |
| gfx::Point View::GetPosition() const { |
| return gfx::Point(GetX(APPLY_MIRRORING_TRANSFORMATION), y()); |
| } |
| |
| gfx::Size View::GetPreferredSize() { |
| if (layout_manager_.get()) |
| return layout_manager_->GetPreferredSize(this); |
| return gfx::Size(); |
| } |
| |
| void View::SizeToPreferredSize() { |
| gfx::Size prefsize = GetPreferredSize(); |
| if ((prefsize.width() != width()) || (prefsize.height() != height())) |
| SetBounds(x(), y(), prefsize.width(), prefsize.height()); |
| } |
| |
| gfx::Size View::GetMinimumSize() { |
| return GetPreferredSize(); |
| } |
| |
| int View::GetHeightForWidth(int w) { |
| if (layout_manager_.get()) |
| return layout_manager_->GetPreferredHeightForWidth(this, w); |
| |
| return GetPreferredSize().height(); |
| } |
| |
| void View::DidChangeBounds(const gfx::Rect& previous, |
| const gfx::Rect& current) { |
| Layout(); |
| } |
| |
| void View::ScrollRectToVisible(int x, int y, int width, int height) { |
| View* parent = GetParent(); |
| |
| // We must take RTL UI mirroring into account when adjusting the position of |
| // the region. |
| if (parent) |
| parent->ScrollRectToVisible( |
| GetX(APPLY_MIRRORING_TRANSFORMATION) + x, View::y() + y, width, height); |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - layout |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| void View::Layout() { |
| // Layout child Views |
| if (layout_manager_.get()) { |
| layout_manager_->Layout(this); |
| SchedulePaint(); |
| } |
| |
| // Lay out contents of child Views |
| int child_count = GetChildViewCount(); |
| for (int i = 0; i < child_count; ++i) { |
| View* child = GetChildViewAt(i); |
| child->Layout(); |
| } |
| } |
| |
| LayoutManager* View::GetLayoutManager() const { |
| return layout_manager_.get(); |
| } |
| |
| void View::SetLayoutManager(LayoutManager* layout_manager) { |
| if (layout_manager_.get()) { |
| layout_manager_->Uninstalled(this); |
| } |
| layout_manager_.reset(layout_manager); |
| if (layout_manager_.get()) { |
| layout_manager_->Installed(this); |
| } |
| } |
| |
| bool View::UILayoutIsRightToLeft() const { |
| return (ui_mirroring_is_enabled_for_rtl_languages_ && |
| l10n_util::GetTextDirection() == l10n_util::RIGHT_TO_LEFT); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // View - Right-to-left UI layout |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| inline int View::MirroredX() const { |
| // TODO(beng): reimplement in terms of MirroredLeftPointForRect. |
| View* parent = GetParent(); |
| if (parent && parent->UILayoutIsRightToLeft()) |
| return parent->width() - x() - width(); |
| return x(); |
| } |
| |
| int View::MirroredLeftPointForRect(const gfx::Rect& bounds) const { |
| if (!UILayoutIsRightToLeft()) { |
| return bounds.x(); |
| } |
| return width() - bounds.x() - bounds.width(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // View - states |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool View::IsEnabled() const { |
| return enabled_; |
| } |
| |
| void View::SetEnabled(bool state) { |
| if (enabled_ != state) { |
| enabled_ = state; |
| SchedulePaint(); |
| } |
| } |
| |
| bool View::IsFocusable() const { |
| return focusable_ && enabled_ && is_visible_; |
| } |
| |
| void View::SetFocusable(bool focusable) { |
| focusable_ = focusable; |
| } |
| |
| FocusManager* View::GetFocusManager() { |
| Widget* widget = GetWidget(); |
| if (!widget) |
| return NULL; |
| |
| HWND hwnd = widget->GetHWND(); |
| if (!hwnd) |
| return NULL; |
| |
| return FocusManager::GetFocusManager(hwnd); |
| } |
| |
| bool View::HasFocus() { |
| RootView* root_view = GetRootView(); |
| FocusManager* focus_manager = GetFocusManager(); |
| if (focus_manager) |
| return focus_manager->GetFocusedView() == this; |
| return false; |
| } |
| |
| void View::SetHotTracked(bool flag) { |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - painting |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| void View::SchedulePaint(const gfx::Rect& r, bool urgent) { |
| if (!IsVisible()) |
| return; |
| |
| if (parent_) { |
| // Translate the requested paint rect to the parent's coordinate system |
| // then pass this notification up to the parent. |
| gfx::Rect paint_rect = r; |
| paint_rect.Offset(GetPosition()); |
| parent_->SchedulePaint(paint_rect, urgent); |
| } |
| } |
| |
| void View::SchedulePaint() { |
| SchedulePaint(GetLocalBounds(true), false); |
| } |
| |
| void View::SchedulePaint(int x, int y, int w, int h) { |
| SchedulePaint(gfx::Rect(x, y, w, h), false); |
| } |
| |
| void View::Paint(ChromeCanvas* canvas) { |
| PaintBackground(canvas); |
| PaintFocusBorder(canvas); |
| PaintBorder(canvas); |
| } |
| |
| void View::PaintBackground(ChromeCanvas* canvas) { |
| if (background_.get()) |
| background_->Paint(canvas, this); |
| } |
| |
| void View::PaintBorder(ChromeCanvas* canvas) { |
| if (border_.get()) |
| border_->Paint(*this, canvas); |
| } |
| |
| void View::PaintFocusBorder(ChromeCanvas* canvas) { |
| if (HasFocus() && IsFocusable()) |
| canvas->DrawFocusRect(0, 0, width(), height()); |
| } |
| |
| void View::PaintChildren(ChromeCanvas* canvas) { |
| int i, c; |
| for (i = 0, c = GetChildViewCount(); i < c; ++i) { |
| View* child = GetChildViewAt(i); |
| if (!child) { |
| NOTREACHED() << "Should not have a NULL child View for index in bounds"; |
| continue; |
| } |
| child->ProcessPaint(canvas); |
| } |
| } |
| |
| void View::ProcessPaint(ChromeCanvas* canvas) { |
| if (!IsVisible()) { |
| return; |
| } |
| |
| // We're going to modify the canvas, save it's state first. |
| canvas->save(); |
| |
| // Paint this View and its children, setting the clip rect to the bounds |
| // of this View and translating the origin to the local bounds' top left |
| // point. |
| // |
| // Note that the X (or left) position we pass to ClipRectInt takes into |
| // consideration whether or not the view uses a right-to-left layout so that |
| // we paint our view in its mirrored position if need be. |
| if (canvas->ClipRectInt(MirroredX(), y(), width(), height())) { |
| // Non-empty clip, translate the graphics such that 0,0 corresponds to |
| // where this view is located (related to its parent). |
| canvas->TranslateInt(MirroredX(), y()); |
| |
| // Save the state again, so that any changes don't effect PaintChildren. |
| canvas->save(); |
| |
| // If the View we are about to paint requested the canvas to be flipped, we |
| // should change the transform appropriately. |
| bool flip_canvas = FlipCanvasOnPaintForRTLUI(); |
| if (flip_canvas) { |
| canvas->TranslateInt(width(), 0); |
| canvas->ScaleInt(-1, 1); |
| canvas->save(); |
| } |
| |
| Paint(canvas); |
| |
| // We must undo the canvas mirroring once the View is done painting so that |
| // we don't pass the canvas with the mirrored transform to Views that |
| // didn't request the canvas to be flipped. |
| if (flip_canvas) { |
| canvas->restore(); |
| } |
| canvas->restore(); |
| PaintChildren(canvas); |
| } |
| |
| // Restore the canvas's original transform. |
| canvas->restore(); |
| } |
| |
| void View::PaintNow() { |
| if (!IsVisible()) { |
| return; |
| } |
| |
| View* view = GetParent(); |
| if (view) |
| view->PaintNow(); |
| } |
| |
| void View::PaintFloatingView(ChromeCanvas* canvas, View* view, |
| int x, int y, int w, int h) { |
| if (should_restore_focus_ && ShouldRestoreFloatingViewFocus()) { |
| // We are painting again a floating view, this is a good time to restore the |
| // focus to the last focused floating view if any. |
| should_restore_focus_ = false; |
| restore_focus_view_task_ = new RestoreFocusTask(this); |
| MessageLoop::current()->PostTask(FROM_HERE, restore_focus_view_task_); |
| } |
| View* saved_parent = view->GetParent(); |
| view->SetParent(this); |
| view->SetBounds(x, y, w, h); |
| view->Layout(); |
| view->ProcessPaint(canvas); |
| view->SetParent(saved_parent); |
| } |
| |
| gfx::Insets View::GetInsets() const { |
| gfx::Insets insets; |
| if (border_.get()) |
| border_->GetInsets(&insets); |
| return insets; |
| } |
| |
| void View::SetContextMenuController(ContextMenuController* menu_controller) { |
| context_menu_controller_ = menu_controller; |
| } |
| |
| void View::ShowContextMenu(int x, int y, bool is_mouse_gesture) { |
| if (!context_menu_controller_) |
| return; |
| |
| context_menu_controller_->ShowContextMenu(this, x, y, is_mouse_gesture); |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - tree |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| bool View::ProcessMousePressed(const MouseEvent& e, DragInfo* drag_info) { |
| const bool enabled = enabled_; |
| int drag_operations; |
| if (enabled && e.IsOnlyLeftMouseButton() && HitTest(e.location())) |
| drag_operations = GetDragOperations(e.x(), e.y()); |
| else |
| drag_operations = 0; |
| ContextMenuController* context_menu_controller = context_menu_controller_; |
| |
| const bool result = OnMousePressed(e); |
| // WARNING: we may have been deleted, don't use any View variables; |
| |
| if (!enabled) |
| return result; |
| |
| if (drag_operations != DragDropTypes::DRAG_NONE) { |
| drag_info->PossibleDrag(e.x(), e.y()); |
| return true; |
| } |
| return !!context_menu_controller || result; |
| } |
| |
| bool View::ProcessMouseDragged(const MouseEvent& e, DragInfo* drag_info) { |
| // Copy the field, that way if we're deleted after drag and drop no harm is |
| // done. |
| ContextMenuController* context_menu_controller = context_menu_controller_; |
| const bool possible_drag = drag_info->possible_drag; |
| if (possible_drag && ExceededDragThreshold(drag_info->start_x - e.x(), |
| drag_info->start_y - e.y())) { |
| DoDrag(e, drag_info->start_x, drag_info->start_y); |
| } else { |
| if (OnMouseDragged(e)) |
| return true; |
| // Fall through to return value based on context menu controller. |
| } |
| // WARNING: we may have been deleted. |
| return (context_menu_controller != NULL) || possible_drag; |
| } |
| |
| void View::ProcessMouseReleased(const MouseEvent& e, bool canceled) { |
| if (!canceled && context_menu_controller_ && e.IsOnlyRightMouseButton()) { |
| // Assume that if there is a context menu controller we won't be deleted |
| // from mouse released. |
| gfx::Point location(e.location()); |
| ConvertPointToScreen(this, &location); |
| ContextMenuController* context_menu_controller = context_menu_controller_; |
| OnMouseReleased(e, canceled); |
| ShowContextMenu(location.x(), location.y(), true); |
| } else { |
| OnMouseReleased(e, canceled); |
| } |
| // WARNING: we may have been deleted. |
| } |
| |
| void View::DoDrag(const MouseEvent& e, int press_x, int press_y) { |
| scoped_refptr<OSExchangeData> data = new OSExchangeData; |
| WriteDragData(press_x, press_y, data.get()); |
| |
| // Message the RootView to do the drag and drop. That way if we're removed |
| // the RootView can detect it and avoid calling us back. |
| RootView* root_view = GetRootView(); |
| root_view->StartDragForViewFromMouseEvent( |
| this, data, GetDragOperations(press_x, press_y)); |
| } |
| |
| void View::AddChildView(View* v) { |
| AddChildView(static_cast<int>(child_views_.size()), v, false); |
| } |
| |
| void View::AddChildView(int index, View* v) { |
| AddChildView(index, v, false); |
| } |
| |
| void View::AddChildView(int index, View* v, bool floating_view) { |
| // Remove the view from its current parent if any. |
| if (v->GetParent()) |
| v->GetParent()->RemoveChildView(v); |
| |
| if (!floating_view) { |
| // Sets the prev/next focus views. |
| InitFocusSiblings(v, index); |
| } |
| |
| // Let's insert the view. |
| child_views_.insert(child_views_.begin() + index, v); |
| v->SetParent(this); |
| |
| for (View* p = this; p; p = p->GetParent()) { |
| p->ViewHierarchyChangedImpl(false, true, this, v); |
| } |
| v->PropagateAddNotifications(this, v); |
| UpdateTooltip(); |
| RootView* root = GetRootView(); |
| if (root) |
| RegisterChildrenForVisibleBoundsNotification(root, v); |
| |
| if (layout_manager_.get()) |
| layout_manager_->ViewAdded(this, v); |
| } |
| |
| View* View::GetChildViewAt(int index) const { |
| return index < GetChildViewCount() ? child_views_[index] : NULL; |
| } |
| |
| int View::GetChildViewCount() const { |
| return static_cast<int>(child_views_.size()); |
| } |
| |
| void View::RemoveChildView(View* a_view) { |
| DoRemoveChildView(a_view, true, true, false); |
| } |
| |
| void View::RemoveAllChildViews(bool delete_views) { |
| ViewList::iterator iter; |
| while ((iter = child_views_.begin()) != child_views_.end()) { |
| DoRemoveChildView(*iter, false, false, delete_views); |
| } |
| UpdateTooltip(); |
| } |
| |
| void View::DoRemoveChildView(View* a_view, |
| bool update_focus_cycle, |
| bool update_tool_tip, |
| bool delete_removed_view) { |
| #ifndef NDEBUG |
| DCHECK(!IsProcessingPaint()) << "Should not be removing a child view " << |
| "during a paint, this will seriously " << |
| "mess things up!"; |
| #endif |
| DCHECK(a_view); |
| const ViewList::iterator i = find(child_views_.begin(), |
| child_views_.end(), |
| a_view); |
| if (i != child_views_.end()) { |
| if (update_focus_cycle && !a_view->IsFloatingView()) { |
| // Let's remove the view from the focus traversal. |
| View* next_focusable = a_view->next_focusable_view_; |
| View* prev_focusable = a_view->previous_focusable_view_; |
| if (prev_focusable) |
| prev_focusable->next_focusable_view_ = next_focusable; |
| if (next_focusable) |
| next_focusable->previous_focusable_view_ = prev_focusable; |
| } |
| |
| RootView* root = GetRootView(); |
| if (root) |
| UnregisterChildrenForVisibleBoundsNotification(root, a_view); |
| a_view->PropagateRemoveNotifications(this); |
| a_view->SetParent(NULL); |
| |
| if (delete_removed_view && a_view->IsParentOwned()) |
| delete a_view; |
| |
| child_views_.erase(i); |
| } |
| |
| if (update_tool_tip) |
| UpdateTooltip(); |
| |
| if (layout_manager_.get()) |
| layout_manager_->ViewRemoved(this, a_view); |
| } |
| |
| void View::PropagateRemoveNotifications(View* parent) { |
| int i, c; |
| for (i = 0, c = GetChildViewCount(); i < c; ++i) { |
| GetChildViewAt(i)->PropagateRemoveNotifications(parent); |
| } |
| |
| View *t; |
| for (t = this; t; t = t->GetParent()) { |
| t->ViewHierarchyChangedImpl(true, false, parent, this); |
| } |
| } |
| |
| void View::PropagateAddNotifications(View* parent, View* child) { |
| int i, c; |
| for (i = 0, c = GetChildViewCount(); i < c; ++i) { |
| GetChildViewAt(i)->PropagateAddNotifications(parent, child); |
| } |
| ViewHierarchyChangedImpl(true, true, parent, child); |
| } |
| |
| #ifndef NDEBUG |
| bool View::IsProcessingPaint() const { |
| return GetParent() && GetParent()->IsProcessingPaint(); |
| } |
| #endif |
| |
| gfx::Point View::GetKeyboardContextMenuLocation() { |
| gfx::Rect vis_bounds = GetVisibleBounds(); |
| gfx::Point screen_point(vis_bounds.x() + vis_bounds.width() / 2, |
| vis_bounds.y() + vis_bounds.height() / 2); |
| ConvertPointToScreen(this, &screen_point); |
| return screen_point; |
| } |
| |
| bool View::HasHitTestMask() const { |
| return false; |
| } |
| |
| void View::GetHitTestMask(gfx::Path* mask) const { |
| DCHECK(mask); |
| } |
| |
| void View::ViewHierarchyChanged(bool is_add, |
| View* parent, |
| View* child) { |
| } |
| |
| void View::ViewHierarchyChangedImpl(bool register_accelerators, |
| bool is_add, |
| View* parent, |
| View* child) { |
| if (register_accelerators) { |
| if (is_add) { |
| // If you get this registration, you are part of a subtree that has been |
| // added to the view hierarchy. |
| RegisterAccelerators(); |
| } else { |
| if (child == this) |
| UnregisterAccelerators(); |
| } |
| } |
| |
| ViewHierarchyChanged(is_add, parent, child); |
| } |
| |
| void View::PropagateVisibilityNotifications(View* start, bool is_visible) { |
| int i, c; |
| for (i = 0, c = GetChildViewCount(); i < c; ++i) { |
| GetChildViewAt(i)->PropagateVisibilityNotifications(start, is_visible); |
| } |
| VisibilityChanged(start, is_visible); |
| } |
| |
| void View::VisibilityChanged(View* starting_from, bool is_visible) { |
| } |
| |
| View* View::GetViewForPoint(const gfx::Point& point) { |
| return GetViewForPoint(point, true); |
| } |
| |
| void View::SetNotifyWhenVisibleBoundsInRootChanges(bool value) { |
| if (notify_when_visible_bounds_in_root_changes_ == value) |
| return; |
| notify_when_visible_bounds_in_root_changes_ = value; |
| RootView* root = GetRootView(); |
| if (root) { |
| if (value) |
| root->RegisterViewForVisibleBoundsNotification(this); |
| else |
| root->UnregisterViewForVisibleBoundsNotification(this); |
| } |
| } |
| |
| bool View::GetNotifyWhenVisibleBoundsInRootChanges() { |
| return notify_when_visible_bounds_in_root_changes_; |
| } |
| |
| View* View::GetViewForPoint(const gfx::Point& point, |
| bool can_create_floating) { |
| // Walk the child Views recursively looking for the View that most |
| // tightly encloses the specified point. |
| for (int i = GetChildViewCount() - 1 ; i >= 0 ; --i) { |
| View* child = GetChildViewAt(i); |
| if (!child->IsVisible()) |
| continue; |
| |
| gfx::Point point_in_child_coords(point); |
| View::ConvertPointToView(this, child, &point_in_child_coords); |
| if (child->HitTest(point_in_child_coords)) |
| return child->GetViewForPoint(point_in_child_coords, true); |
| } |
| |
| // We haven't found a view for the point. Try to create floating views |
| // and try again if one was created. |
| // can_create_floating makes sure we don't try forever even if |
| // GetFloatingViewIDForPoint lies or if RetrieveFloatingViewForID creates a |
| // view which doesn't contain the provided point |
| int id; |
| if (can_create_floating && |
| GetFloatingViewIDForPoint(point.x(), point.y(), &id)) { |
| RetrieveFloatingViewForID(id); // This creates the floating view. |
| return GetViewForPoint(point, false); |
| } |
| return this; |
| } |
| |
| Widget* View::GetWidget() const { |
| // The root view holds a reference to this view hierarchy's Widget. |
| return parent_ ? parent_->GetWidget() : NULL; |
| } |
| |
| // Get the containing RootView |
| RootView* View::GetRootView() { |
| Widget* widget = GetWidget(); |
| return widget ? widget->GetRootView() : NULL; |
| } |
| |
| View* View::GetViewByID(int id) const { |
| if (id == id_) |
| return const_cast<View*>(this); |
| |
| int view_count = GetChildViewCount(); |
| for (int i = 0; i < view_count; ++i) { |
| View* child = GetChildViewAt(i); |
| View* view = child->GetViewByID(id); |
| if (view) |
| return view; |
| } |
| return NULL; |
| } |
| |
| void View::GetViewsWithGroup(int group_id, std::vector<View*>* out) { |
| if (group_ == group_id) |
| out->push_back(this); |
| |
| int view_count = GetChildViewCount(); |
| for (int i = 0; i < view_count; ++i) |
| GetChildViewAt(i)->GetViewsWithGroup(group_id, out); |
| } |
| |
| View* View::GetSelectedViewForGroup(int group_id) { |
| std::vector<View*> views; |
| GetRootView()->GetViewsWithGroup(group_id, &views); |
| if (views.size() > 0) |
| return views[0]; |
| else |
| return NULL; |
| } |
| |
| void View::SetID(int id) { |
| id_ = id; |
| } |
| |
| int View::GetID() const { |
| return id_; |
| } |
| |
| void View::SetGroup(int gid) { |
| group_ = gid; |
| } |
| |
| int View::GetGroup() const { |
| return group_; |
| } |
| |
| void View::SetParent(View* parent) { |
| if (parent != parent_) { |
| parent_ = parent; |
| } |
| } |
| |
| bool View::IsParentOf(View* v) const { |
| DCHECK(v); |
| View* parent = v->GetParent(); |
| while (parent) { |
| if (this == parent) |
| return true; |
| parent = parent->GetParent(); |
| } |
| return false; |
| } |
| |
| int View::GetChildIndex(View* v) const { |
| for (int i = 0; i < GetChildViewCount(); i++) { |
| if (v == GetChildViewAt(i)) |
| return i; |
| } |
| return -1; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // View - focus |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| View* View::GetNextFocusableView() { |
| return next_focusable_view_; |
| } |
| |
| View* View::GetPreviousFocusableView() { |
| return previous_focusable_view_; |
| } |
| |
| void View::SetNextFocusableView(View* view) { |
| view->previous_focusable_view_ = this; |
| next_focusable_view_ = view; |
| } |
| |
| void View::InitFocusSiblings(View* v, int index) { |
| int child_count = static_cast<int>(child_views_.size()); |
| |
| if (child_count == 0) { |
| v->next_focusable_view_ = NULL; |
| v->previous_focusable_view_ = NULL; |
| } else { |
| if (index == child_count) { |
| // We are inserting at the end, but the end of the child list may not be |
| // the last focusable element. Let's try to find an element with no next |
| // focusable element to link to. |
| View* last_focusable_view = NULL; |
| for (std::vector<View*>::iterator iter = child_views_.begin(); |
| iter != child_views_.end(); ++iter) { |
| if (!(*iter)->next_focusable_view_) { |
| last_focusable_view = *iter; |
| break; |
| } |
| } |
| if (last_focusable_view == NULL) { |
| // Hum... there is a cycle in the focus list. Let's just insert ourself |
| // after the last child. |
| View* prev = child_views_[index - 1]; |
| v->previous_focusable_view_ = prev; |
| v->next_focusable_view_ = prev->next_focusable_view_; |
| prev->next_focusable_view_->previous_focusable_view_ = v; |
| prev->next_focusable_view_ = v; |
| } else { |
| last_focusable_view->next_focusable_view_ = v; |
| v->next_focusable_view_ = NULL; |
| v->previous_focusable_view_ = last_focusable_view; |
| } |
| } else { |
| View* prev = child_views_[index]->GetPreviousFocusableView(); |
| v->previous_focusable_view_ = prev; |
| v->next_focusable_view_ = child_views_[index]; |
| if (prev) |
| prev->next_focusable_view_ = v; |
| child_views_[index]->previous_focusable_view_ = v; |
| } |
| } |
| } |
| |
| #ifndef NDEBUG |
| void View::PrintViewHierarchy() { |
| PrintViewHierarchyImp(0); |
| } |
| |
| void View::PrintViewHierarchyImp(int indent) { |
| std::wostringstream buf; |
| int ind = indent; |
| while (ind-- > 0) |
| buf << L' '; |
| buf << UTF8ToWide(GetClassName()); |
| buf << L' '; |
| buf << GetID(); |
| buf << L' '; |
| buf << bounds_.x() << L"," << bounds_.y() << L","; |
| buf << bounds_.right() << L"," << bounds_.bottom(); |
| buf << L' '; |
| buf << this; |
| |
| LOG(INFO) << buf.str(); |
| std::cout << buf.str() << std::endl; |
| |
| for (int i = 0; i < GetChildViewCount(); ++i) { |
| GetChildViewAt(i)->PrintViewHierarchyImp(indent + 2); |
| } |
| } |
| |
| |
| void View::PrintFocusHierarchy() { |
| PrintFocusHierarchyImp(0); |
| } |
| |
| void View::PrintFocusHierarchyImp(int indent) { |
| std::wostringstream buf; |
| int ind = indent; |
| while (ind-- > 0) |
| buf << L' '; |
| buf << UTF8ToWide(GetClassName()); |
| buf << L' '; |
| buf << GetID(); |
| buf << L' '; |
| buf << GetClassName().c_str(); |
| buf << L' '; |
| buf << this; |
| |
| LOG(INFO) << buf.str(); |
| std::cout << buf.str() << std::endl; |
| |
| if (GetChildViewCount() > 0) |
| GetChildViewAt(0)->PrintFocusHierarchyImp(indent + 2); |
| |
| View* v = GetNextFocusableView(); |
| if (v) |
| v->PrintFocusHierarchyImp(indent); |
| } |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // View - accelerators |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void View::AddAccelerator(const Accelerator& accelerator) { |
| if (!accelerators_.get()) |
| accelerators_.reset(new std::vector<Accelerator>()); |
| accelerators_->push_back(accelerator); |
| RegisterAccelerators(); |
| } |
| |
| void View::RemoveAccelerator(const Accelerator& accelerator) { |
| std::vector<Accelerator>::iterator iter; |
| if (!accelerators_.get() || |
| ((iter = std::find(accelerators_->begin(), accelerators_->end(), |
| accelerator)) == accelerators_->end())) { |
| NOTREACHED() << "Removing non-existing accelerator"; |
| return; |
| } |
| |
| accelerators_->erase(iter); |
| RootView* root_view = GetRootView(); |
| if (!root_view) { |
| // We are not part of a view hierarchy, so there is nothing to do as we |
| // removed ourselves from accelerators_, we won't be registered when added |
| // to one. |
| return; |
| } |
| |
| FocusManager* focus_manager = GetFocusManager(); |
| if (focus_manager) { |
| // We may not have a FocusManager if the window containing us is being |
| // closed, in which case the FocusManager is being deleted so there is |
| // nothing to unregister. |
| focus_manager->UnregisterAccelerator(accelerator, this); |
| } |
| } |
| |
| void View::ResetAccelerators() { |
| if (accelerators_.get()) { |
| UnregisterAccelerators(); |
| accelerators_->clear(); |
| accelerators_.reset(); |
| } |
| } |
| |
| void View::RegisterAccelerators() { |
| if (!accelerators_.get()) |
| return; |
| |
| RootView* root_view = GetRootView(); |
| if (!root_view) { |
| // We are not yet part of a view hierarchy, we'll register ourselves once |
| // added to one. |
| return; |
| } |
| FocusManager* focus_manager = GetFocusManager(); |
| if (!focus_manager) { |
| // Some crash reports seem to show that we may get cases where we have no |
| // focus manager (see bug #1291225). This should never be the case, just |
| // making sure we don't crash. |
| NOTREACHED(); |
| return; |
| } |
| for (std::vector<Accelerator>::const_iterator iter = accelerators_->begin(); |
| iter != accelerators_->end(); ++iter) { |
| focus_manager->RegisterAccelerator(*iter, this); |
| } |
| } |
| |
| void View::UnregisterAccelerators() { |
| if (!accelerators_.get()) |
| return; |
| |
| RootView* root_view = GetRootView(); |
| if (root_view) { |
| FocusManager* focus_manager = GetFocusManager(); |
| if (focus_manager) { |
| // We may not have a FocusManager if the window containing us is being |
| // closed, in which case the FocusManager is being deleted so there is |
| // nothing to unregister. |
| focus_manager->UnregisterAccelerators(this); |
| } |
| } |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - accessibility |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| AccessibleWrapper* View::GetAccessibleWrapper() { |
| if (accessibility_.get() == NULL) { |
| accessibility_.reset(new AccessibleWrapper(this)); |
| } |
| return accessibility_.get(); |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - floating views |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| bool View::IsFloatingView() { |
| if (!parent_) |
| return false; |
| |
| return parent_->floating_views_ids_.find(this) != |
| parent_->floating_views_ids_.end(); |
| } |
| |
| // default implementation does nothing |
| bool View::GetFloatingViewIDForPoint(int x, int y, int* id) { |
| return false; |
| } |
| |
| int View::GetFloatingViewCount() const { |
| return static_cast<int>(floating_views_.size()); |
| } |
| |
| View* View::RetrieveFloatingViewParent() { |
| View* v = this; |
| while (v) { |
| if (v->IsFloatingView()) |
| return v; |
| v = v->GetParent(); |
| } |
| return NULL; |
| } |
| |
| bool View::EnumerateFloatingViews(FloatingViewPosition position, |
| int starting_id, int* id) { |
| return false; |
| } |
| |
| int View::GetDragOperations(int press_x, int press_y) { |
| if (!drag_controller_) |
| return DragDropTypes::DRAG_NONE; |
| return drag_controller_->GetDragOperations(this, press_x, press_y); |
| } |
| |
| void View::WriteDragData(int press_x, int press_y, OSExchangeData* data) { |
| DCHECK(drag_controller_); |
| drag_controller_->WriteDragData(this, press_x, press_y, data); |
| } |
| |
| void View::OnDragDone() { |
| } |
| |
| bool View::InDrag() { |
| RootView* root_view = GetRootView(); |
| return root_view ? (root_view->GetDragView() == this) : false; |
| } |
| |
| View* View::ValidateFloatingViewForID(int id) { |
| return NULL; |
| } |
| |
| bool View::ShouldRestoreFloatingViewFocus() { |
| return true; |
| } |
| |
| void View::AttachFloatingView(View* v, int id) { |
| floating_views_.push_back(v); |
| floating_views_ids_[v] = id; |
| AddChildView(static_cast<int>(child_views_.size()), v, true); |
| } |
| |
| bool View::HasFloatingViewForPoint(int x, int y) { |
| int i, c; |
| View* v; |
| gfx::Rect r; |
| |
| for (i = 0, c = static_cast<int>(floating_views_.size()); i < c; ++i) { |
| v = floating_views_[i]; |
| r.SetRect(v->GetX(APPLY_MIRRORING_TRANSFORMATION), v->y(), |
| v->width(), v->height()); |
| if (r.Contains(x, y)) |
| return true; |
| } |
| return false; |
| } |
| |
| void View::DetachAllFloatingViews() { |
| RootView* root_view = GetRootView(); |
| View* focused_view = NULL; |
| FocusManager* focus_manager = NULL; |
| if (root_view) { |
| // We may be called when we are not attached to a root view in which case |
| // there is nothing to do for focus. |
| focus_manager = GetFocusManager(); |
| if (focus_manager) { |
| // We may not have a focus manager (if we are detached from a top window). |
| focused_view = focus_manager->GetFocusedView(); |
| } |
| } |
| |
| int c = static_cast<int>(floating_views_.size()); |
| while (--c >= 0) { |
| // If the focused view is a floating view or a floating view's children, |
| // use the focus manager to store it. |
| int tmp_id; |
| if (focused_view && |
| ((focused_view == floating_views_[c]) || |
| floating_views_[c]->IsParentOf(focused_view))) { |
| // We call EnumerateFloatingView to make sure the floating view is still |
| // valid: the model may have changed and could not know anything about |
| // that floating view anymore. |
| if (EnumerateFloatingViews(CURRENT, |
| floating_views_[c]->GetFloatingViewID(), |
| &tmp_id)) { |
| focus_manager->StoreFocusedView(); |
| should_restore_focus_ = true; |
| } |
| focused_view = NULL; |
| } |
| |
| RemoveChildView(floating_views_[c]); |
| delete floating_views_[c]; |
| } |
| floating_views_.clear(); |
| floating_views_ids_.clear(); |
| } |
| |
| int View::GetFloatingViewID() { |
| DCHECK(IsFloatingView()); |
| std::map<View*, int>::iterator iter = parent_->floating_views_ids_.find(this); |
| DCHECK(iter != parent_->floating_views_ids_.end()); |
| return iter->second; |
| } |
| |
| View* View::RetrieveFloatingViewForID(int id) { |
| for (ViewList::const_iterator iter = floating_views_.begin(); |
| iter != floating_views_.end(); ++iter) { |
| if ((*iter)->GetFloatingViewID() == id) |
| return *iter; |
| } |
| return ValidateFloatingViewForID(id); |
| } |
| |
| void View::RestoreFloatingViewFocus() { |
| // Clear the reference to the task as if we have been triggered by it, it will |
| // soon be invalid. |
| restore_focus_view_task_ = NULL; |
| should_restore_focus_ = false; |
| |
| GetFocusManager()->RestoreFocusedView(); |
| } |
| |
| // static |
| bool View::EnumerateFloatingViewsForInterval(int low_bound, int high_bound, |
| bool ascending_order, |
| FloatingViewPosition position, |
| int starting_id, |
| int* id) { |
| DCHECK(low_bound <= high_bound); |
| if (low_bound >= high_bound) |
| return false; |
| |
| switch (position) { |
| case CURRENT: |
| if ((starting_id >= low_bound) && (starting_id < high_bound)) { |
| *id = starting_id; |
| return true; |
| } |
| return false; |
| case FIRST: |
| *id = ascending_order ? low_bound : high_bound - 1; |
| return true; |
| case LAST: |
| *id = ascending_order ? high_bound - 1 : low_bound; |
| return true; |
| case NEXT: |
| case PREVIOUS: |
| if (((position == NEXT) && ascending_order) || |
| ((position == PREVIOUS) && !ascending_order)) { |
| starting_id++; |
| if (starting_id < high_bound) { |
| *id = starting_id; |
| return true; |
| } |
| return false; |
| } |
| DCHECK(((position == NEXT) && !ascending_order) || |
| ((position == PREVIOUS) && ascending_order)); |
| starting_id--; |
| if (starting_id >= low_bound) { |
| *id = starting_id; |
| return true; |
| } |
| return false; |
| default: |
| NOTREACHED(); |
| } |
| return false; |
| } |
| |
| // static |
| void View::ConvertPointToView(const View* src, |
| const View* dst, |
| gfx::Point* point) { |
| ConvertPointToView(src, dst, point, true); |
| } |
| |
| // static |
| void View::ConvertPointToView(const View* src, |
| const View* dst, |
| gfx::Point* point, |
| bool try_other_direction) { |
| // src can be NULL |
| DCHECK(dst); |
| DCHECK(point); |
| |
| const View* v; |
| gfx::Point offset; |
| |
| for (v = dst; v && v != src; v = v->GetParent()) { |
| offset.SetPoint(offset.x() + v->GetX(APPLY_MIRRORING_TRANSFORMATION), |
| offset.y() + v->y()); |
| } |
| |
| // The source was not found. The caller wants a conversion |
| // from a view to a transitive parent. |
| if (src && v == NULL && try_other_direction) { |
| gfx::Point p; |
| // note: try_other_direction is force to FALSE so we don't |
| // end up in an infinite recursion should both src and dst |
| // are not parented. |
| ConvertPointToView(dst, src, &p, false); |
| // since the src and dst are inverted, p should also be negated |
| point->SetPoint(point->x() - p.x(), point->y() - p.y()); |
| } else { |
| point->SetPoint(point->x() - offset.x(), point->y() - offset.y()); |
| |
| // If src is NULL, sp is in the screen coordinate system |
| if (src == NULL) { |
| Widget* widget = dst->GetWidget(); |
| if (widget) { |
| gfx::Rect b; |
| widget->GetBounds(&b, false); |
| point->SetPoint(point->x() - b.x(), point->y() - b.y()); |
| } |
| } |
| } |
| } |
| |
| // static |
| void View::ConvertPointToWidget(View* src, gfx::Point* p) { |
| DCHECK(src); |
| DCHECK(p); |
| |
| View *v; |
| gfx::Point offset; |
| for (v = src; v; v = v->GetParent()) { |
| offset.set_x(offset.x() + v->GetX(APPLY_MIRRORING_TRANSFORMATION)); |
| offset.set_y(offset.y() + v->y()); |
| } |
| p->SetPoint(p->x() + offset.x(), p->y() + offset.y()); |
| } |
| |
| // static |
| void View::ConvertPointFromWidget(View *source, gfx::Point* p) { |
| gfx::Point t; |
| ConvertPointToWidget(source, &t); |
| p->SetPoint(p->x() - t.x(), p->y() - t.y()); |
| } |
| |
| // static |
| void View::ConvertPointToScreen(View* src, gfx::Point* p) { |
| DCHECK(src); |
| DCHECK(p); |
| |
| // If the view is not connected to a tree, there's nothing we can do. |
| Widget* widget = src->GetWidget(); |
| if (widget) { |
| ConvertPointToWidget(src, p); |
| gfx::Rect r; |
| widget->GetBounds(&r, false); |
| p->SetPoint(p->x() + r.x(), p->y() + r.y()); |
| } |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - event handlers |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| bool View::OnMousePressed(const MouseEvent& e) { |
| return false; |
| } |
| |
| bool View::OnMouseDragged(const MouseEvent& e) { |
| return false; |
| } |
| |
| void View::OnMouseReleased(const MouseEvent& e, bool canceled) { |
| } |
| |
| void View::OnMouseMoved(const MouseEvent& e) { |
| } |
| |
| void View::OnMouseEntered(const MouseEvent& e) { |
| } |
| |
| void View::OnMouseExited(const MouseEvent& e) { |
| } |
| |
| void View::SetMouseHandler(View *new_mouse_handler) { |
| // It is valid for new_mouse_handler to be NULL |
| if (parent_) { |
| parent_->SetMouseHandler(new_mouse_handler); |
| } |
| } |
| |
| void View::SetVisible(bool flag) { |
| if (flag != is_visible_) { |
| // If the tab is currently visible, schedule paint to |
| // refresh parent |
| if (IsVisible()) { |
| SchedulePaint(); |
| } |
| |
| is_visible_ = flag; |
| |
| // This notifies all subviews recursively. |
| PropagateVisibilityNotifications(this, flag); |
| |
| // If we are newly visible, schedule paint. |
| if (IsVisible()) { |
| SchedulePaint(); |
| } |
| } |
| } |
| |
| bool View::IsVisibleInRootView() const { |
| View* parent = GetParent(); |
| if (IsVisible() && parent) |
| return parent->IsVisibleInRootView(); |
| else |
| return false; |
| } |
| |
| bool View::HitTest(const gfx::Point& l) const { |
| if (l.x() >= 0 && l.x() < static_cast<int>(width()) && |
| l.y() >= 0 && l.y() < static_cast<int>(height())) { |
| if (HasHitTestMask()) { |
| gfx::Path mask; |
| GetHitTestMask(&mask); |
| ScopedHRGN rgn(mask.CreateHRGN()); |
| return !!PtInRegion(rgn, l.x(), l.y()); |
| } |
| // No mask, but inside our bounds. |
| return true; |
| } |
| // Outside our bounds. |
| return false; |
| } |
| |
| HCURSOR View::GetCursorForPoint(Event::EventType event_type, int x, int y) { |
| return NULL; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| // |
| // View - keyboard and focus |
| // |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| void View::RequestFocus() { |
| RootView* rv = GetRootView(); |
| if (rv) { |
| rv->FocusView(this); |
| } |
| } |
| |
| void View::WillGainFocus() { |
| } |
| |
| void View::DidGainFocus() { |
| } |
| |
| void View::WillLoseFocus() { |
| } |
| |
| bool View::OnKeyPressed(const KeyEvent& e) { |
| return false; |
| } |
| |
| bool View::OnKeyReleased(const KeyEvent& e) { |
| return false; |
| } |
| |
| bool View::OnMouseWheel(const MouseWheelEvent& e) { |
| return false; |
| } |
| |
| void View::SetDragController(DragController* drag_controller) { |
| drag_controller_ = drag_controller; |
| } |
| |
| DragController* View::GetDragController() { |
| return drag_controller_; |
| } |
| |
| bool View::CanDrop(const OSExchangeData& data) { |
| return false; |
| } |
| |
| void View::OnDragEntered(const DropTargetEvent& event) { |
| } |
| |
| int View::OnDragUpdated(const DropTargetEvent& event) { |
| return DragDropTypes::DRAG_NONE; |
| } |
| |
| void View::OnDragExited() { |
| } |
| |
| int View::OnPerformDrop(const DropTargetEvent& event) { |
| return DragDropTypes::DRAG_NONE; |
| } |
| |
| static int GetHorizontalDragThreshold() { |
| static int threshold = -1; |
| if (threshold == -1) |
| threshold = GetSystemMetrics(SM_CXDRAG) / 2; |
| return threshold; |
| } |
| |
| static int GetVerticalDragThreshold() { |
| static int threshold = -1; |
| if (threshold == -1) |
| threshold = GetSystemMetrics(SM_CYDRAG) / 2; |
| return threshold; |
| } |
| |
| // static |
| bool View::ExceededDragThreshold(int delta_x, int delta_y) { |
| return (abs(delta_x) > GetHorizontalDragThreshold() || |
| abs(delta_y) > GetVerticalDragThreshold()); |
| } |
| |
| void View::Focus() { |
| // Set the native focus to the root view window so it receives the keyboard |
| // messages. |
| FocusManager* focus_manager = GetFocusManager(); |
| if (focus_manager) |
| focus_manager->FocusHWND(GetRootView()->GetWidget()->GetHWND()); |
| } |
| |
| bool View::CanProcessTabKeyEvents() { |
| return false; |
| } |
| |
| // Tooltips ----------------------------------------------------------------- |
| bool View::GetTooltipText(int x, int y, std::wstring* tooltip) { |
| return false; |
| } |
| |
| bool View::GetTooltipTextOrigin(int x, int y, gfx::Point* loc) { |
| return false; |
| } |
| |
| void View::TooltipTextChanged() { |
| Widget* widget = GetWidget(); |
| if (widget && widget->GetTooltipManager()) |
| widget->GetTooltipManager()->TooltipTextChanged(this); |
| } |
| |
| void View::UpdateTooltip() { |
| Widget* widget = GetWidget(); |
| if (widget && widget->GetTooltipManager()) |
| widget->GetTooltipManager()->UpdateTooltip(); |
| } |
| |
| void View::SetParentOwned(bool f) { |
| is_parent_owned_ = f; |
| } |
| |
| bool View::IsParentOwned() const { |
| return is_parent_owned_; |
| } |
| |
| std::string View::GetClassName() const { |
| return kViewClassName; |
| } |
| |
| gfx::Rect View::GetVisibleBounds() { |
| gfx::Rect vis_bounds(0, 0, width(), height()); |
| gfx::Rect ancestor_bounds; |
| View* view = this; |
| int root_x = 0; |
| int root_y = 0; |
| while (view != NULL && !vis_bounds.IsEmpty()) { |
| root_x += view->GetX(APPLY_MIRRORING_TRANSFORMATION); |
| root_y += view->y(); |
| vis_bounds.Offset(view->GetX(APPLY_MIRRORING_TRANSFORMATION), view->y()); |
| View* ancestor = view->GetParent(); |
| if (ancestor != NULL) { |
| ancestor_bounds.SetRect(0, 0, ancestor->width(), |
| ancestor->height()); |
| vis_bounds = vis_bounds.Intersect(ancestor_bounds); |
| } else if (!view->GetWidget()) { |
| // If the view has no Widget, we're not visible. Return an empty rect. |
| return gfx::Rect(); |
| } |
| view = ancestor; |
| } |
| if (vis_bounds.IsEmpty()) |
| return vis_bounds; |
| // Convert back to this views coordinate system. |
| vis_bounds.Offset(-root_x, -root_y); |
| return vis_bounds; |
| } |
| |
| int View::GetPageScrollIncrement(ScrollView* scroll_view, |
| bool is_horizontal, bool is_positive) { |
| return 0; |
| } |
| |
| int View::GetLineScrollIncrement(ScrollView* scroll_view, |
| bool is_horizontal, bool is_positive) { |
| return 0; |
| } |
| |
| // static |
| void View::RegisterChildrenForVisibleBoundsNotification( |
| RootView* root, View* view) { |
| DCHECK(root && view); |
| if (view->GetNotifyWhenVisibleBoundsInRootChanges()) |
| root->RegisterViewForVisibleBoundsNotification(view); |
| for (int i = 0; i < view->GetChildViewCount(); ++i) |
| RegisterChildrenForVisibleBoundsNotification(root, view->GetChildViewAt(i)); |
| } |
| |
| // static |
| void View::UnregisterChildrenForVisibleBoundsNotification( |
| RootView* root, View* view) { |
| DCHECK(root && view); |
| if (view->GetNotifyWhenVisibleBoundsInRootChanges()) |
| root->UnregisterViewForVisibleBoundsNotification(view); |
| for (int i = 0; i < view->GetChildViewCount(); ++i) |
| UnregisterChildrenForVisibleBoundsNotification(root, |
| view->GetChildViewAt(i)); |
| } |
| |
| void View::AddDescendantToNotify(View* view) { |
| DCHECK(view); |
| if (!descendants_to_notify_.get()) |
| descendants_to_notify_.reset(new ViewList()); |
| descendants_to_notify_->push_back(view); |
| } |
| |
| void View::RemoveDescendantToNotify(View* view) { |
| DCHECK(view && descendants_to_notify_.get()); |
| ViewList::iterator i = find(descendants_to_notify_->begin(), |
| descendants_to_notify_->end(), |
| view); |
| DCHECK(i != descendants_to_notify_->end()); |
| descendants_to_notify_->erase(i); |
| if (descendants_to_notify_->empty()) |
| descendants_to_notify_.reset(); |
| } |
| |
| // static |
| bool View::GetViewPath(View* start, View* end, std::vector<int>* path) { |
| while (end && (end != start)) { |
| View* parent = end->GetParent(); |
| if (!parent) |
| return false; |
| path->insert(path->begin(), parent->GetChildIndex(end)); |
| end = parent; |
| } |
| return end == start; |
| } |
| |
| // static |
| View* View::GetViewForPath(View* start, const std::vector<int>& path) { |
| View* v = start; |
| for (std::vector<int>::const_iterator iter = path.begin(); |
| iter != path.end(); ++iter) { |
| int index = *iter; |
| if (index >= v->GetChildViewCount()) |
| return NULL; |
| v = v->GetChildViewAt(index); |
| } |
| return v; |
| } |
| |
| // DropInfo -------------------------------------------------------------------- |
| |
| void View::DragInfo::Reset() { |
| possible_drag = false; |
| start_x = start_y = 0; |
| } |
| |
| void View::DragInfo::PossibleDrag(int x, int y) { |
| possible_drag = true; |
| start_x = x; |
| start_y = y; |
| } |
| |
| } // namespace |
| |