// 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 "views/view.h" #include #ifndef NDEBUG #include #endif #include "app/drag_drop_types.h" #include "app/gfx/canvas.h" #include "app/l10n_util.h" #include "base/logging.h" #include "base/message_loop.h" #include "base/scoped_handle.h" #include "base/string_util.h" #include "third_party/skia/include/core/SkShader.h" #include "views/background.h" #include "views/layout_manager.h" #include "views/views_delegate.h" #include "views/widget/root_view.h" #include "views/widget/widget.h" #include "views/window/window.h" #if defined(OS_WIN) #include "views/widget/tooltip_manager.h" #include "views/accessibility/view_accessibility_wrapper.h" #endif namespace views { // static ViewsDelegate* ViewsDelegate::views_delegate = NULL; // static char View::kViewClassName[] = "views/View"; ///////////////////////////////////////////////////////////////////////////// // // View - constructors, destructors, initialization // ///////////////////////////////////////////////////////////////////////////// View::View() : id_(0), group_(-1), enabled_(true), focusable_(false), bounds_(0, 0, 0, 0), parent_(NULL), is_visible_(true), 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), context_menu_controller_(NULL), #if defined(OS_WIN) accessibility_(NULL), #endif drag_controller_(NULL), ui_mirroring_is_enabled_for_rtl_languages_(true), flip_canvas_on_paint_for_rtl_ui_(false) { } View::~View() { int c = static_cast(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(), std::max(0, width() - insets.width()), std::max(0, 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()); } void View::PreferredSizeChanged() { if (parent_) parent_->ChildPreferredSizeChanged(this); } 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(); // TODO(beng): We believe the right thing to do here is return since the // layout manager should be handling things, but it causes // regressions (missing options from Options dialog and a hang // in interactive_ui_tests). } // 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; } bool View::HasFocus() { 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(gfx::Canvas* canvas) { PaintBackground(canvas); PaintFocusBorder(canvas); PaintBorder(canvas); } void View::PaintBackground(gfx::Canvas* canvas) { if (background_.get()) background_->Paint(canvas, this); } void View::PaintBorder(gfx::Canvas* canvas) { if (border_.get()) border_->Paint(*this, canvas); } void View::PaintFocusBorder(gfx::Canvas* canvas) { if (HasFocus() && IsFocusable()) canvas->DrawFocusRect(0, 0, width(), height()); } void View::PaintChildren(gfx::Canvas* 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(gfx::Canvas* 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(); } 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 = e.IsRightMouseButton() ? context_menu_controller_ : 0; 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()); OnMouseReleased(e, canceled); if (HitTest(location)) { ConvertPointToScreen(this, &location); ShowContextMenu(location.x(), location.y(), true); } } else { OnMouseReleased(e, canceled); } // WARNING: we may have been deleted. } void View::AddChildView(View* v) { AddChildView(static_cast(child_views_.size()), v); } void View::AddChildView(int index, View* v) { // Remove the view from its current parent if any. if (v->GetParent()) v->GetParent()->RemoveChildView(v); // 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(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) { // 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); } void View::ThemeChanged() { int c = GetChildViewCount(); for (int i = c - 1; i >= 0; --i) GetChildViewAt(i)->ThemeChanged(); } #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) { } 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) { // 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); } return this; } Widget* View::GetWidget() const { // The root view holds a reference to this view hierarchy's Widget. return parent_ ? parent_->GetWidget() : NULL; } Window* View::GetWindow() const { Widget* widget = GetWidget(); return widget ? widget->GetWindow() : 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(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* 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 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(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::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()); accelerators_->push_back(accelerator); RegisterAccelerators(); } void View::RemoveAccelerator(const Accelerator& accelerator) { std::vector::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; } // TODO(port): Fix this once we have a FocusManger for Linux. #if defined(OS_WIN) 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); } #endif } 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; } // TODO(port): Fix this once we have a FocusManger for Linux. #if defined(OS_WIN) 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::const_iterator iter = accelerators_->begin(); iter != accelerators_->end(); ++iter) { focus_manager->RegisterAccelerator(*iter, this); } #endif } void View::UnregisterAccelerators() { if (!accelerators_.get()) return; RootView* root_view = GetRootView(); if (root_view) { // TODO(port): Fix this once we have a FocusManger for Linux. #if defined(OS_WIN) 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); } #endif } } 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; } // 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(const View* src, gfx::Point* p) { DCHECK(src); DCHECK(p); gfx::Point offset; for (const View* 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(const View* dest, gfx::Point* p) { gfx::Point t; ConvertPointToWidget(dest, &t); p->SetPoint(p->x() - t.x(), p->y() - t.y()); } // static void View::ConvertPointToScreen(const 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; } ///////////////////////////////////////////////////////////////////////////// // // View - keyboard and focus // ///////////////////////////////////////////////////////////////////////////// void View::RequestFocus() { RootView* rv = GetRootView(); if (rv && IsFocusable()) 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 bool View::ExceededDragThreshold(int delta_x, int delta_y) { return (abs(delta_x) > GetHorizontalDragThreshold() || abs(delta_y) > GetVerticalDragThreshold()); } // 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() { #if defined(OS_WIN) Widget* widget = GetWidget(); if (widget && widget->GetTooltipManager()) widget->GetTooltipManager()->TooltipTextChanged(this); #else // TODO(port): Not actually windows specific; I just haven't ported this part // yet. NOTIMPLEMENTED(); #endif } void View::UpdateTooltip() { #if defined(OS_WIN) Widget* widget = GetWidget(); if (widget && widget->GetTooltipManager()) widget->GetTooltipManager()->UpdateTooltip(); #else // TODO(port): Not actually windows specific; I just haven't ported this part // yet. NOTIMPLEMENTED(); #endif } void View::SetParentOwned(bool f) { is_parent_owned_ = f; } bool View::IsParentOwned() const { return is_parent_owned_; } std::string View::GetClassName() const { return kViewClassName; } View* View::GetAncestorWithClassName(const std::string& name) { for (View* view = this; view; view = view->GetParent()) { if (view->GetClassName() == name) return view; } return NULL; } gfx::Rect View::GetVisibleBounds() { if (!IsVisibleInRootView()) return gfx::Rect(); 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; } ThemeProvider* View::GetThemeProvider() { Widget* widget = GetWidget(); return widget ? widget->GetThemeProvider() : NULL; } // 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(); } // 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