blob: 9105c9194528208c68f102fd6fd598cf64992d05 [file] [log] [blame]
// Copyright (c) 2011 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 <algorithm>
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/utf_string_conversions.h"
#include "third_party/skia/include/core/SkRect.h"
#include "ui/base/accessibility/accessibility_types.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/gfx/canvas_skia.h"
#include "ui/gfx/compositor/compositor.h"
#include "ui/gfx/compositor/layer.h"
#include "ui/gfx/path.h"
#include "ui/gfx/point3.h"
#include "ui/gfx/transform.h"
#include "views/background.h"
#include "views/context_menu_controller.h"
#include "views/drag_controller.h"
#include "views/layer_property_setter.h"
#include "views/layout/layout_manager.h"
#include "views/views_delegate.h"
#include "views/widget/native_widget_private.h"
#include "views/widget/root_view.h"
#include "views/widget/tooltip_manager.h"
#include "views/widget/widget.h"
#if defined(OS_WIN)
#include "base/win/scoped_gdi_object.h"
#include "views/accessibility/native_view_accessibility_win.h"
#endif
#if defined(OS_LINUX)
#include "ui/base/gtk/scoped_handle_gtk.h"
#endif
namespace {
// Whether to use accelerated compositing when necessary (e.g. when a view has a
// transformation).
#if !defined(OS_CHROMEOS) || defined(TOUCH_UI)
bool use_acceleration_when_possible = true;
#else
bool use_acceleration_when_possible = false;
#endif
// Saves the drawing state, and restores the state when going out of scope.
class ScopedCanvas {
public:
explicit ScopedCanvas(gfx::Canvas* canvas) : canvas_(canvas) {
if (canvas_)
canvas_->Save();
}
~ScopedCanvas() {
if (canvas_)
canvas_->Restore();
}
void SetCanvas(gfx::Canvas* canvas) {
if (canvas_)
canvas_->Restore();
canvas_ = canvas;
canvas_->Save();
}
private:
gfx::Canvas* canvas_;
DISALLOW_COPY_AND_ASSIGN(ScopedCanvas);
};
} // namespace
namespace views {
// static
ViewsDelegate* ViewsDelegate::views_delegate = NULL;
// static
char View::kViewClassName[] = "views/View";
////////////////////////////////////////////////////////////////////////////////
// View, public:
// TO BE MOVED -----------------------------------------------------------------
void View::SetHotTracked(bool flag) {
}
bool View::IsHotTracked() const {
return false;
}
// Creation and lifetime -------------------------------------------------------
View::View()
: parent_owned_(true),
id_(0),
group_(-1),
parent_(NULL),
visible_(true),
enabled_(true),
registered_for_visible_bounds_notification_(false),
clip_x_(0.0),
clip_y_(0.0),
needs_layout_(true),
flip_canvas_on_paint_for_rtl_ui_(false),
accelerator_registration_delayed_(false),
accelerator_focus_manager_(NULL),
registered_accelerator_count_(0),
next_focusable_view_(NULL),
previous_focusable_view_(NULL),
focusable_(false),
accessibility_focusable_(false),
context_menu_controller_(NULL),
drag_controller_(NULL) {
}
View::~View() {
if (parent_)
parent_->RemoveChildView(this);
for (Views::const_iterator i(children_.begin()); i != children_.end(); ++i) {
(*i)->parent_ = NULL;
if ((*i)->parent_owned())
delete *i;
}
#if defined(OS_WIN)
if (native_view_accessibility_win_.get())
native_view_accessibility_win_->set_view(NULL);
#endif
}
// Tree operations -------------------------------------------------------------
const Widget* View::GetWidget() const {
// The root view holds a reference to this view hierarchy's Widget.
return parent_ ? parent_->GetWidget() : NULL;
}
Widget* View::GetWidget() {
return const_cast<Widget*>(const_cast<const View*>(this)->GetWidget());
}
void View::AddChildView(View* view) {
AddChildViewAt(view, child_count());
}
void View::AddChildViewAt(View* view, int index) {
CHECK_NE(view, this) << "You cannot add a view as its own child";
// If |view| has a parent, remove it from its parent.
View* parent = view->parent_;
if (parent)
parent->RemoveChildView(view);
// Sets the prev/next focus views.
InitFocusSiblings(view, index);
// Let's insert the view.
view->parent_ = this;
children_.insert(children_.begin() + index, view);
if (GetWidget()) {
// Sending out notification of insert may result in adding other views.
// Invoke this first to make sure we know the layer is created (if needed).
view->CreateLayerIfNecessary();
}
for (View* v = this; v; v = v->parent_)
v->ViewHierarchyChangedImpl(false, true, this, view);
view->PropagateAddNotifications(this, view);
UpdateTooltip();
if (GetWidget()) {
RegisterChildrenForVisibleBoundsNotification(view);
view->CreateLayerIfNecessary();
}
if (layout_manager_.get())
layout_manager_->ViewAdded(this, view);
view->MarkLayerDirty();
}
void View::ReorderChildView(View* view, int index) {
DCHECK_EQ(view->parent_, this);
if (index < 0)
index = child_count() - 1;
else if (index >= child_count())
return;
if (children_[index] == view)
return;
const Views::iterator i(std::find(children_.begin(), children_.end(), view));
DCHECK(i != children_.end());
children_.erase(i);
// Unlink the view first
View* next_focusable = view->next_focusable_view_;
View* prev_focusable = view->previous_focusable_view_;
if (prev_focusable)
prev_focusable->next_focusable_view_ = next_focusable;
if (next_focusable)
next_focusable->previous_focusable_view_ = prev_focusable;
// Add it in the specified index now.
InitFocusSiblings(view, index);
children_.insert(children_.begin() + index, view);
}
void View::RemoveChildView(View* view) {
DoRemoveChildView(view, true, true, false);
}
void View::RemoveAllChildViews(bool delete_children) {
while (!children_.empty())
DoRemoveChildView(children_.front(), false, false, delete_children);
UpdateTooltip();
}
bool View::Contains(const View* view) const {
for (const View* v = view; v; v = v->parent_) {
if (v == this)
return true;
}
return false;
}
int View::GetIndexOf(const View* view) const {
Views::const_iterator i(std::find(children_.begin(), children_.end(), view));
return i != children_.end() ? static_cast<int>(i - children_.begin()) : -1;
}
// Size and disposition --------------------------------------------------------
void View::SetBounds(int x, int y, int width, int height) {
SetBoundsRect(gfx::Rect(x, y, std::max(0, width), std::max(0, height)));
}
void View::SetBoundsRect(const gfx::Rect& bounds) {
if (bounds == bounds_) {
if (needs_layout_) {
needs_layout_ = false;
Layout();
SchedulePaint();
}
return;
}
if (IsVisible()) {
// Paint where the view is currently.
SchedulePaintBoundsChanged(
bounds_.size() == bounds.size() ? SCHEDULE_PAINT_SIZE_SAME :
SCHEDULE_PAINT_SIZE_CHANGED);
}
gfx::Rect prev = bounds_;
bounds_ = bounds;
BoundsChanged(prev);
}
void View::SetSize(const gfx::Size& size) {
SetBounds(x(), y(), size.width(), size.height());
}
void View::SetPosition(const gfx::Point& position) {
SetBounds(position.x(), position.y(), width(), height());
}
void View::SetX(int x) {
SetBounds(x, y(), width(), height());
}
void View::SetY(int y) {
SetBounds(x(), y, width(), height());
}
gfx::Rect View::GetContentsBounds() const {
gfx::Rect contents_bounds(GetLocalBounds());
if (border_.get()) {
gfx::Insets insets;
border_->GetInsets(&insets);
contents_bounds.Inset(insets);
}
return contents_bounds;
}
gfx::Rect View::GetLocalBounds() const {
return gfx::Rect(0, 0, width(), height());
}
gfx::Insets View::GetInsets() const {
gfx::Insets insets;
if (border_.get())
border_->GetInsets(&insets);
return insets;
}
gfx::Rect View::GetVisibleBounds() const {
if (!IsVisibleInRootView())
return gfx::Rect();
gfx::Rect vis_bounds(0, 0, width(), height());
gfx::Rect ancestor_bounds;
const View* view = this;
ui::Transform transform;
while (view != NULL && !vis_bounds.IsEmpty()) {
if (view->transform())
transform.ConcatTransform(*view->transform());
transform.ConcatTranslate(static_cast<float>(view->GetMirroredX()),
static_cast<float>(view->y()));
vis_bounds = view->ConvertRectToParent(vis_bounds);
const View* ancestor = view->parent_;
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.
transform.TransformRectReverse(&vis_bounds);
return vis_bounds;
}
gfx::Rect View::GetScreenBounds() const {
gfx::Point origin;
View::ConvertPointToScreen(this, &origin);
return gfx::Rect(origin, size());
}
gfx::Size View::GetPreferredSize() {
if (layout_manager_.get())
return layout_manager_->GetPreferredSize(this);
return gfx::Size();
}
int View::GetBaseline() const {
return -1;
}
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::SetVisible(bool visible) {
if (visible != visible_) {
// If the tab is currently visible, schedule paint to refresh parent.
if (visible_)
SchedulePaint();
visible_ = visible;
if (visible_)
CreateLayerIfNecessary();
else
// Destroy layer if tab is invisible as invisible tabs never paint
DestroyLayerRecurse();
// This notifies all sub-views recursively.
PropagateVisibilityNotifications(this, visible_);
// If we are newly visible, schedule paint.
if (visible_)
SchedulePaint();
}
}
bool View::IsVisible() const {
return visible_;
}
bool View::IsVisibleInRootView() const {
return IsVisible() && parent_ ? parent_->IsVisibleInRootView() : false;
}
void View::SetEnabled(bool enabled) {
if (enabled != enabled_) {
enabled_ = enabled;
OnEnabledChanged();
}
}
bool View::IsEnabled() const {
return enabled_;
}
void View::OnEnabledChanged() {
SchedulePaint();
}
// Transformations -------------------------------------------------------------
const ui::Transform& View::GetTransform() const {
static const ui::Transform* no_op = new ui::Transform;
return transform() ? *transform() : *no_op;
}
void View::SetTransform(const ui::Transform& transform) {
if (!transform.HasChange()) {
if (!layer_helper_.get() || !this->transform())
return;
layer_helper_->SetTransform(transform);
if (!ShouldPaintToLayer())
DestroyLayerAndReparent();
else if (layer())
layer_helper_->property_setter()->SetTransform(layer(), transform);
SchedulePaint();
} else {
// Make sure if the view didn't have its own texture and was painting onto
// something else, that gets refreshed too.
if (!ShouldPaintToLayer())
MarkLayerDirty();
if (!layer_helper_.get())
layer_helper_.reset(new internal::LayerHelper());
layer_helper_->SetTransform(transform);
if (!layer()) {
CreateLayer();
SchedulePaint();
} else {
layer_helper_->property_setter()->SetTransform(layer(), transform);
// We have a layer. When the transform changes and the layer is up to
// date we don't want to SchedulePaint as it'll trigger painting to the
// layer. Instead we tell the Widget to paint, which makes the
// compositor draw using the existing layer.
// We schedule paint the complete bounds as compositor generally don't
// support partial painting.
Widget* widget = GetWidget();
if (widget)
widget->SchedulePaintInRect(widget->GetRootView()->bounds());
}
}
}
void View::SetPaintToLayer(bool value) {
bool paint_to_layer = layer_helper_.get() && layer_helper_->paint_to_layer();
if (value == paint_to_layer)
return;
if (value) {
if (!layer_helper_.get())
layer_helper_.reset(new internal::LayerHelper());
layer_helper_->set_paint_to_layer(true);
CreateLayer();
} else if (layer_helper_.get()) {
layer_helper_->set_paint_to_layer(false);
if (!ShouldPaintToLayer())
DestroyLayerAndReparent();
}
}
void View::SetLayerPropertySetter(LayerPropertySetter* setter) {
if ((layer_helper_.get() && layer_helper_->property_setter() == setter) ||
(!layer_helper_.get() && setter == NULL)) {
return;
}
if (!layer_helper_.get())
layer_helper_.reset(new internal::LayerHelper());
layer_helper_->set_property_setter_explicitly_set(setter != NULL);
layer_helper_->SetPropertySetter(setter);
}
// RTL positioning -------------------------------------------------------------
gfx::Rect View::GetMirroredBounds() const {
gfx::Rect bounds(bounds_);
bounds.set_x(GetMirroredX());
return bounds;
}
gfx::Point View::GetMirroredPosition() const {
return gfx::Point(GetMirroredX(), y());
}
int View::GetMirroredX() const {
return parent_ ? parent_->GetMirroredXForRect(bounds_) : x();
}
int View::GetMirroredXForRect(const gfx::Rect& bounds) const {
return base::i18n::IsRTL() ?
(width() - bounds.x() - bounds.width()) : bounds.x();
}
int View::GetMirroredXInView(int x) const {
return base::i18n::IsRTL() ? width() - x : x;
}
int View::GetMirroredXWithWidthInView(int x, int w) const {
return base::i18n::IsRTL() ? width() - x - w : x;
}
// Layout ----------------------------------------------------------------------
void View::Layout() {
needs_layout_ = false;
// If we have a layout manager, let it handle the layout for us.
if (layout_manager_.get())
layout_manager_->Layout(this);
// Make sure to propagate the Layout() call to any children that haven't
// received it yet through the layout manager and need to be laid out. This
// is needed for the case when the child requires a layout but its bounds
// weren't changed by the layout manager. If there is no layout manager, we
// just propagate the Layout() call down the hierarchy, so whoever receives
// the call can take appropriate action.
for (int i = 0, count = child_count(); i < count; ++i) {
View* child = child_at(i);
if (child->needs_layout_ || !layout_manager_.get()) {
child->needs_layout_ = false;
child->Layout();
}
}
}
void View::InvalidateLayout() {
// Always invalidate up. This is needed to handle the case of us already being
// valid, but not our parent.
needs_layout_ = true;
if (parent_)
parent_->InvalidateLayout();
}
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);
}
// Attributes ------------------------------------------------------------------
std::string View::GetClassName() const {
return kViewClassName;
}
View* View::GetAncestorWithClassName(const std::string& name) {
for (View* view = this; view; view = view->parent_) {
if (view->GetClassName() == name)
return view;
}
return NULL;
}
const View* View::GetViewByID(int id) const {
if (id == id_)
return const_cast<View*>(this);
for (int i = 0, count = child_count(); i < count; ++i) {
const View* view = child_at(i)->GetViewByID(id);
if (view)
return view;
}
return NULL;
}
View* View::GetViewByID(int id) {
return const_cast<View*>(const_cast<const View*>(this)->GetViewByID(id));
}
void View::SetGroup(int gid) {
// Don't change the group id once it's set.
DCHECK(group_ == -1 || group_ == gid);
group_ = gid;
}
int View::GetGroup() const {
return group_;
}
bool View::IsGroupFocusTraversable() const {
return true;
}
void View::GetViewsInGroup(int group, Views* views) {
if (group_ == group)
views->push_back(this);
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->GetViewsInGroup(group, views);
}
View* View::GetSelectedViewForGroup(int group) {
Views views;
GetWidget()->GetRootView()->GetViewsInGroup(group, &views);
return views.empty() ? NULL : views[0];
}
// Coordinate conversion -------------------------------------------------------
// static
void View::ConvertPointToView(const View* src,
const View* dst,
gfx::Point* point) {
ConvertPointToView(src, dst, point, true);
}
// static
void View::ConvertPointToWidget(const View* src, gfx::Point* p) {
DCHECK(src);
DCHECK(p);
src->ConvertPointForAncestor(NULL, p);
}
// static
void View::ConvertPointFromWidget(const View* dest, gfx::Point* p) {
DCHECK(dest);
DCHECK(p);
dest->ConvertPointFromAncestor(NULL, p);
}
// 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.
const Widget* widget = src->GetWidget();
if (widget) {
ConvertPointToWidget(src, p);
gfx::Rect r = widget->GetClientAreaScreenBounds();
p->SetPoint(p->x() + r.x(), p->y() + r.y());
}
}
gfx::Rect View::ConvertRectToParent(const gfx::Rect& rect) const {
gfx::Rect x_rect = rect;
if (transform())
transform()->TransformRect(&x_rect);
x_rect.Offset(GetMirroredPosition());
return x_rect;
}
gfx::Rect View::ConvertRectToWidget(const gfx::Rect& rect) const {
gfx::Rect x_rect = rect;
for (const View* v = this; v; v = v->parent_)
x_rect = v->ConvertRectToParent(x_rect);
return x_rect;
}
// Painting --------------------------------------------------------------------
void View::SchedulePaint() {
SchedulePaintInRect(GetLocalBounds());
}
void View::SchedulePaintInRect(const gfx::Rect& rect) {
if (!IsVisible())
return;
MarkLayerDirty();
SchedulePaintInternal(rect);
}
void View::Paint(gfx::Canvas* canvas) {
if (!IsVisible())
return;
ScopedCanvas scoped_canvas(NULL);
scoped_ptr<gfx::Canvas> layer_canvas;
gfx::Rect layer_rect;
if (layer()) {
gfx::Rect dirty_rect;
if (!layer_helper_->clip_rect().IsEmpty()) {
dirty_rect = layer_helper_->clip_rect();
} else {
// TODO: clip against dirty rect of canvas (if canvas is non-null).
dirty_rect = gfx::Rect(0, 0, width(), height());
}
if (dirty_rect.IsEmpty())
return;
if (!layer_helper_->bitmap_needs_updating()) {
// We don't need to be painted. Iterate over descendants in case one of
// them is dirty.
PaintToLayer(dirty_rect);
return;
}
layer_canvas.reset(gfx::Canvas::CreateCanvas(dirty_rect.width(),
dirty_rect.height(), false));
layer_canvas->AsCanvasSkia()->drawColor(
SK_ColorBLACK, SkXfermode::kClear_Mode);
layer_canvas->TranslateInt(-dirty_rect.x(), -dirty_rect.y());
canvas = layer_canvas.get();
layer_rect = dirty_rect;
} else {
// We're going to modify the canvas, save its state first.
scoped_canvas.SetCanvas(canvas);
// 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(GetMirroredX(), y(),
width() - static_cast<int>(clip_x_),
height() - static_cast<int>(clip_y_))) {
return;
}
// Non-empty clip, translate the graphics such that 0,0 corresponds to
// where this view is located (related to its parent).
canvas->TranslateInt(GetMirroredX(), y());
if (transform())
canvas->Transform(*transform());
}
{
// If the View we are about to paint requested the canvas to be flipped, we
// should change the transform appropriately.
// The canvas mirroring is undone 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.
ScopedCanvas scoped(canvas);
if (FlipCanvasOnPaintForRTLUI()) {
canvas->TranslateInt(width(), 0);
canvas->ScaleInt(-1, 1);
}
OnPaint(canvas);
}
PaintChildren(canvas);
if (layer_canvas.get()) {
layer()->SetBitmap(
layer_canvas->AsCanvasSkia()->getDevice()->accessBitmap(false),
layer_rect.origin());
layer_helper_->set_bitmap_needs_updating(false);
}
}
ThemeProvider* View::GetThemeProvider() const {
const Widget* widget = GetWidget();
return widget ? widget->GetThemeProvider() : NULL;
}
// Accelerated Painting --------------------------------------------------------
// static
void View::set_use_acceleration_when_possible(bool use) {
use_acceleration_when_possible = use;
}
// static
bool View::get_use_acceleration_when_possible() {
return use_acceleration_when_possible;
}
// Input -----------------------------------------------------------------------
View* View::GetEventHandlerForPoint(const gfx::Point& point) {
// Walk the child Views recursively looking for the View that most
// tightly encloses the specified point.
for (int i = child_count() - 1; i >= 0; --i) {
View* child = child_at(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->GetEventHandlerForPoint(point_in_child_coords);
}
return this;
}
gfx::NativeCursor View::GetCursor(const MouseEvent& event) {
#if defined(OS_WIN)
static HCURSOR arrow = LoadCursor(NULL, IDC_ARROW);
return arrow;
#else
return NULL;
#endif
}
bool View::HitTest(const gfx::Point& l) const {
if (GetLocalBounds().Contains(l)) {
if (HasHitTestMask()) {
gfx::Path mask;
GetHitTestMask(&mask);
// TODO: can this use SkRegion's contains instead?
#if defined(OS_WIN)
base::win::ScopedRegion rgn(mask.CreateNativeRegion());
return !!PtInRegion(rgn, l.x(), l.y());
#elif defined(TOOLKIT_USES_GTK)
ui::ScopedRegion rgn(mask.CreateNativeRegion());
return gdk_region_point_in(rgn.Get(), l.x(), l.y());
#endif
}
// No mask, but inside our bounds.
return true;
}
// Outside our bounds.
return false;
}
bool View::OnMousePressed(const MouseEvent& event) {
return false;
}
bool View::OnMouseDragged(const MouseEvent& event) {
return false;
}
void View::OnMouseReleased(const MouseEvent& event) {
}
void View::OnMouseCaptureLost() {
}
void View::OnMouseMoved(const MouseEvent& event) {
}
void View::OnMouseEntered(const MouseEvent& event) {
}
void View::OnMouseExited(const MouseEvent& event) {
}
ui::TouchStatus View::OnTouchEvent(const TouchEvent& event) {
DVLOG(1) << "visited the OnTouchEvent";
return ui::TOUCH_STATUS_UNKNOWN;
}
void View::SetMouseHandler(View *new_mouse_handler) {
// It is valid for new_mouse_handler to be NULL
if (parent_)
parent_->SetMouseHandler(new_mouse_handler);
}
bool View::OnKeyPressed(const KeyEvent& event) {
return false;
}
bool View::OnKeyReleased(const KeyEvent& event) {
return false;
}
bool View::OnMouseWheel(const MouseWheelEvent& event) {
return false;
}
TextInputClient* View::GetTextInputClient() {
return NULL;
}
InputMethod* View::GetInputMethod() {
Widget* widget = GetWidget();
return widget ? widget->GetInputMethod() : NULL;
}
// Accelerators ----------------------------------------------------------------
void View::AddAccelerator(const Accelerator& accelerator) {
if (!accelerators_.get())
accelerators_.reset(new std::vector<Accelerator>());
DCHECK(std::find(accelerators_->begin(), accelerators_->end(), accelerator) ==
accelerators_->end())
<< "Registering the same accelerator multiple times";
accelerators_->push_back(accelerator);
RegisterPendingAccelerators();
}
void View::RemoveAccelerator(const Accelerator& accelerator) {
if (!accelerators_.get()) {
NOTREACHED() << "Removing non-existing accelerator";
return;
}
std::vector<Accelerator>::iterator i(
std::find(accelerators_->begin(), accelerators_->end(), accelerator));
if (i == accelerators_->end()) {
NOTREACHED() << "Removing non-existing accelerator";
return;
}
size_t index = i - accelerators_->begin();
accelerators_->erase(i);
if (index >= registered_accelerator_count_) {
// The accelerator is not registered to FocusManager.
return;
}
--registered_accelerator_count_;
// Providing we are attached to a Widget and registered with a focus manager,
// we should de-register from that focus manager now.
if (GetWidget() && accelerator_focus_manager_)
accelerator_focus_manager_->UnregisterAccelerator(accelerator, this);
}
void View::ResetAccelerators() {
if (accelerators_.get())
UnregisterAccelerators(false);
}
bool View::AcceleratorPressed(const Accelerator& accelerator) {
return false;
}
// Focus -----------------------------------------------------------------------
bool View::HasFocus() {
FocusManager* focus_manager = GetFocusManager();
if (focus_manager)
return focus_manager->GetFocusedView() == this;
return false;
}
View* View::GetNextFocusableView() {
return next_focusable_view_;
}
const View* View::GetNextFocusableView() const {
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;
}
bool View::IsFocusableInRootView() const {
return IsFocusable() && IsVisibleInRootView();
}
bool View::IsAccessibilityFocusableInRootView() const {
return (focusable_ || accessibility_focusable_) && IsEnabled() &&
IsVisibleInRootView();
}
FocusManager* View::GetFocusManager() {
Widget* widget = GetWidget();
return widget ? widget->GetFocusManager() : NULL;
}
void View::RequestFocus() {
FocusManager* focus_manager = GetFocusManager();
if (focus_manager && IsFocusableInRootView())
focus_manager->SetFocusedView(this);
}
bool View::SkipDefaultKeyEventProcessing(const KeyEvent& event) {
return false;
}
FocusTraversable* View::GetFocusTraversable() {
return NULL;
}
FocusTraversable* View::GetPaneFocusTraversable() {
return NULL;
}
// Tooltips --------------------------------------------------------------------
bool View::GetTooltipText(const gfx::Point& p, std::wstring* tooltip) {
return false;
}
bool View::GetTooltipTextOrigin(const gfx::Point& p, gfx::Point* loc) {
return false;
}
// Context menus ---------------------------------------------------------------
void View::ShowContextMenu(const gfx::Point& p, bool is_mouse_gesture) {
if (!context_menu_controller_)
return;
context_menu_controller_->ShowContextMenuForView(this, p, is_mouse_gesture);
}
// Drag and drop ---------------------------------------------------------------
bool View::GetDropFormats(
int* formats,
std::set<OSExchangeData::CustomFormat>* custom_formats) {
return false;
}
bool View::AreDropTypesRequired() {
return false;
}
bool View::CanDrop(const OSExchangeData& data) {
// TODO(sky): when I finish up migration, this should default to true.
return false;
}
void View::OnDragEntered(const DropTargetEvent& event) {
}
int View::OnDragUpdated(const DropTargetEvent& event) {
return ui::DragDropTypes::DRAG_NONE;
}
void View::OnDragExited() {
}
int View::OnPerformDrop(const DropTargetEvent& event) {
return ui::DragDropTypes::DRAG_NONE;
}
void View::OnDragDone() {
}
// static
bool View::ExceededDragThreshold(int delta_x, int delta_y) {
return (abs(delta_x) > GetHorizontalDragThreshold() ||
abs(delta_y) > GetVerticalDragThreshold());
}
// Scrolling -------------------------------------------------------------------
void View::ScrollRectToVisible(const gfx::Rect& rect) {
// We must take RTL UI mirroring into account when adjusting the position of
// the region.
if (parent_) {
gfx::Rect scroll_rect(rect);
scroll_rect.Offset(GetMirroredX(), y());
parent_->ScrollRectToVisible(scroll_rect);
}
}
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;
}
////////////////////////////////////////////////////////////////////////////////
// View, protected:
// Size and disposition --------------------------------------------------------
void View::OnBoundsChanged(const gfx::Rect& previous_bounds) {
}
void View::PreferredSizeChanged() {
InvalidateLayout();
if (parent_)
parent_->ChildPreferredSizeChanged(this);
}
bool View::NeedsNotificationWhenVisibleBoundsChange() const {
return false;
}
void View::OnVisibleBoundsChanged() {
}
// Tree operations -------------------------------------------------------------
void View::ViewHierarchyChanged(bool is_add, View* parent, View* child) {
}
void View::VisibilityChanged(View* starting_from, bool is_visible) {
}
void View::NativeViewHierarchyChanged(bool attached,
gfx::NativeView native_view,
internal::RootView* root_view) {
FocusManager* focus_manager = GetFocusManager();
if (!accelerator_registration_delayed_ &&
accelerator_focus_manager_ &&
accelerator_focus_manager_ != focus_manager) {
UnregisterAccelerators(true);
accelerator_registration_delayed_ = true;
}
if (accelerator_registration_delayed_ && attached) {
if (focus_manager) {
RegisterPendingAccelerators();
accelerator_registration_delayed_ = false;
}
}
}
// Painting --------------------------------------------------------------------
void View::PaintChildren(gfx::Canvas* canvas) {
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->Paint(canvas);
}
void View::OnPaint(gfx::Canvas* canvas) {
OnPaintBackground(canvas);
OnPaintFocusBorder(canvas);
OnPaintBorder(canvas);
}
void View::OnPaintBackground(gfx::Canvas* canvas) {
if (background_.get())
background_->Paint(canvas, this);
}
void View::OnPaintBorder(gfx::Canvas* canvas) {
if (border_.get())
border_->Paint(*this, canvas);
}
void View::OnPaintFocusBorder(gfx::Canvas* canvas) {
if ((IsFocusable() || IsAccessibilityFocusableInRootView()) && HasFocus())
canvas->DrawFocusRect(0, 0, width(), height());
}
// Accelerated Painting --------------------------------------------------------
void View::PaintComposite() {
if (!IsVisible())
return;
if (layer()) {
OnWillCompositeLayer();
layer()->Draw();
}
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->PaintComposite();
}
void View::SchedulePaintInternal(const gfx::Rect& rect) {
if (parent_ && parent_->IsVisible()) {
// Translate the requested paint rect to the parent's coordinate system
// then pass this notification up to the parent.
parent_->SchedulePaintInternal(ConvertRectToParent(rect));
}
}
void View::PaintToLayer(const gfx::Rect& dirty_region) {
if (!IsVisible())
return;
if (layer() && layer_helper_->bitmap_needs_updating()) {
if (!layer_helper_->needs_paint_all())
layer_helper_->set_clip_rect(dirty_region);
else
layer_helper_->set_needs_paint_all(false);
Paint(NULL);
layer_helper_->set_clip_rect(gfx::Rect());
} else {
// Forward to all children as a descendant may be dirty and have a layer.
for (int i = child_count() - 1; i >= 0; --i) {
View* child_view = child_at(i);
gfx::Rect child_dirty_rect = dirty_region;
child_dirty_rect.Offset(-child_view->GetMirroredX(), -child_view->y());
child_view->GetTransform().TransformRectReverse(&child_dirty_rect);
child_dirty_rect = gfx::Rect(gfx::Point(), child_view->size()).Intersect(
child_dirty_rect);
if (!child_dirty_rect.IsEmpty())
child_at(i)->PaintToLayer(child_dirty_rect);
}
}
}
void View::OnWillCompositeLayer() {
}
bool View::SetExternalTexture(ui::Texture* texture) {
// A little heavy-handed -- it should be that each child has it's own layer.
// The desired use case is where there are no children.
DCHECK_EQ(child_count(), 0);
if (!texture && !layer_helper_.get())
return true;
if (!layer_helper_.get())
layer_helper_.reset(new internal::LayerHelper());
bool use_external = (texture != NULL);
if (use_external != layer_helper_->paint_to_layer())
SetPaintToLayer(use_external);
else if (use_external && !layer())
CreateLayer();
if (use_external && !layer())
return false;
layer_helper_->set_layer_updated_externally(use_external);
layer_helper_->set_bitmap_needs_updating(!use_external);
if (layer())
layer()->SetTexture(texture);
if (IsVisible())
SchedulePaintInternal(GetLocalBounds());
return true;
}
const ui::Compositor* View::GetCompositor() const {
return parent_ ? parent_->GetCompositor() : NULL;
}
ui::Compositor* View::GetCompositor() {
return parent_ ? parent_->GetCompositor() : NULL;
}
void View::MarkLayerDirty() {
if (!use_acceleration_when_possible)
return;
if (ShouldPaintToLayer()) {
if (!layer_helper_->layer_updated_externally())
layer_helper_->set_bitmap_needs_updating(true);
return;
}
if (parent_)
parent_->MarkLayerDirty();
}
void View::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
View** ancestor) {
if (layer()) {
if (ancestor)
*ancestor = this;
return;
}
if (!parent_)
return;
offset->Offset(x(), y());
parent_->CalculateOffsetToAncestorWithLayer(offset, ancestor);
}
void View::CreateLayerIfNecessary() {
if (ShouldPaintToLayer())
CreateLayer();
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->CreateLayerIfNecessary();
}
void View::MoveLayerToParent(ui::Layer* parent_layer,
const gfx::Point& point) {
gfx::Point local_point(point);
if (parent_layer != layer())
local_point.Offset(x(), y());
if (layer() && parent_layer != layer()) {
parent_layer->Add(layer());
layer()->set_bounds(
gfx::Rect(local_point.x(), local_point.y(), width(), height()));
} else {
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->MoveLayerToParent(parent_layer, local_point);
}
}
void View::DestroyLayerRecurse() {
for (int i = child_count() - 1; i >= 0; --i)
child_at(i)->DestroyLayerRecurse();
DestroyLayer();
}
void View::UpdateLayerBounds(const gfx::Point& offset) {
if (layer()) {
layer_helper_->property_setter()->SetBounds(
layer(),
gfx::Rect(offset.x() + x(), offset.y() + y(), width(), height()));
} else {
gfx::Point new_offset(offset.x() + x(), offset.y() + y());
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->UpdateLayerBounds(new_offset);
}
}
// Input -----------------------------------------------------------------------
bool View::HasHitTestMask() const {
return false;
}
void View::GetHitTestMask(gfx::Path* mask) const {
DCHECK(mask);
}
// Focus -----------------------------------------------------------------------
bool View::IsFocusable() const {
return focusable_ && IsEnabled() && IsVisible();
}
void View::OnFocus() {
// TODO(beng): Investigate whether it's possible for us to move this to
// Focus().
// By default, we clear the native focus. This ensures that no visible native
// view as the focus and that we still receive keyboard inputs.
FocusManager* focus_manager = GetFocusManager();
if (focus_manager)
focus_manager->ClearNativeFocus();
// TODO(beng): Investigate whether it's possible for us to move this to
// Focus().
// Notify assistive technologies of the focus change.
GetWidget()->NotifyAccessibilityEvent(
this, ui::AccessibilityTypes::EVENT_FOCUS, true);
}
void View::OnBlur() {
}
void View::Focus() {
SchedulePaint();
OnFocus();
}
void View::Blur() {
SchedulePaint();
OnBlur();
}
// Tooltips --------------------------------------------------------------------
void View::TooltipTextChanged() {
Widget* widget = GetWidget();
// TooltipManager may be null if there is a problem creating it.
if (widget && widget->native_widget_private()->GetTooltipManager()) {
widget->native_widget_private()->GetTooltipManager()->
TooltipTextChanged(this);
}
}
// Context menus ---------------------------------------------------------------
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;
}
// Drag and drop ---------------------------------------------------------------
int View::GetDragOperations(const gfx::Point& press_pt) {
return drag_controller_ ?
drag_controller_->GetDragOperationsForView(this, press_pt) :
ui::DragDropTypes::DRAG_NONE;
}
void View::WriteDragData(const gfx::Point& press_pt, OSExchangeData* data) {
DCHECK(drag_controller_);
drag_controller_->WriteDragDataForView(this, press_pt, data);
}
bool View::InDrag() {
Widget* widget = GetWidget();
return widget ? widget->dragged_view() == this : false;
}
////////////////////////////////////////////////////////////////////////////////
// View, private:
// DropInfo --------------------------------------------------------------------
void View::DragInfo::Reset() {
possible_drag = false;
start_pt = gfx::Point();
}
void View::DragInfo::PossibleDrag(const gfx::Point& p) {
possible_drag = true;
start_pt = p;
}
// Painting --------------------------------------------------------------------
void View::SchedulePaintBoundsChanged(SchedulePaintType type) {
if (layer() && type == SCHEDULE_PAINT_SIZE_SAME) {
// If only the positions changes and we have a layer, we don't need to mark
// the layer as dirty (which SchedulePaint does), only paint the bounds.
SchedulePaintInternal(gfx::Rect(0, 0, width(), height()));
} else {
// If the size changes, or we don't have a layer then we need to use
// SchedulePaint to make sure the layer is marked as dirty.
SchedulePaint();
}
}
// Tree operations -------------------------------------------------------------
void View::DoRemoveChildView(View* view,
bool update_focus_cycle,
bool update_tool_tip,
bool delete_removed_view) {
DCHECK(view);
const Views::iterator i(std::find(children_.begin(), children_.end(), view));
scoped_ptr<View> view_to_be_deleted;
if (i != children_.end()) {
if (update_focus_cycle) {
// Let's remove the view from the focus traversal.
View* next_focusable = view->next_focusable_view_;
View* prev_focusable = view->previous_focusable_view_;
if (prev_focusable)
prev_focusable->next_focusable_view_ = next_focusable;
if (next_focusable)
next_focusable->previous_focusable_view_ = prev_focusable;
}
if (GetWidget())
UnregisterChildrenForVisibleBoundsNotification(view);
view->DestroyLayerRecurse();
view->PropagateRemoveNotifications(this);
view->parent_ = NULL;
if (delete_removed_view && view->parent_owned())
view_to_be_deleted.reset(view);
children_.erase(i);
}
if (update_tool_tip)
UpdateTooltip();
if (layout_manager_.get())
layout_manager_->ViewRemoved(this, view);
}
void View::PropagateRemoveNotifications(View* parent) {
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->PropagateRemoveNotifications(parent);
for (View* v = this; v; v = v->parent_)
v->ViewHierarchyChangedImpl(true, false, parent, this);
}
void View::PropagateAddNotifications(View* parent, View* child) {
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->PropagateAddNotifications(parent, child);
ViewHierarchyChangedImpl(true, true, parent, child);
}
void View::PropagateNativeViewHierarchyChanged(bool attached,
gfx::NativeView native_view,
internal::RootView* root_view) {
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->PropagateNativeViewHierarchyChanged(attached,
native_view,
root_view);
NativeViewHierarchyChanged(attached, native_view, root_view);
}
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.
if (GetFocusManager()) {
RegisterPendingAccelerators();
} else {
// Delay accelerator registration until visible as we do not have
// focus manager until then.
accelerator_registration_delayed_ = true;
}
} else {
if (child == this)
UnregisterAccelerators(true);
}
}
ViewHierarchyChanged(is_add, parent, child);
parent->needs_layout_ = true;
}
// Size and disposition --------------------------------------------------------
void View::PropagateVisibilityNotifications(View* start, bool is_visible) {
for (int i = 0, count = child_count(); i < count; ++i)
child_at(i)->PropagateVisibilityNotifications(start, is_visible);
VisibilityChangedImpl(start, is_visible);
}
void View::VisibilityChangedImpl(View* starting_from, bool is_visible) {
if (is_visible)
RegisterPendingAccelerators();
else
UnregisterAccelerators(true);
VisibilityChanged(starting_from, is_visible);
}
void View::BoundsChanged(const gfx::Rect& previous_bounds) {
if (IsVisible()) {
// Paint the new bounds.
SchedulePaintBoundsChanged(
bounds_.size() == previous_bounds.size() ? SCHEDULE_PAINT_SIZE_SAME :
SCHEDULE_PAINT_SIZE_CHANGED);
if (use_acceleration_when_possible) {
if (layer()) {
if (parent_) {
gfx::Point offset;
parent_->CalculateOffsetToAncestorWithLayer(&offset, NULL);
offset.Offset(x(), y());
layer_helper_->property_setter()->SetBounds(
layer(), gfx::Rect(offset, size()));
} else {
layer_helper_->property_setter()->SetBounds(layer(), bounds_);
}
if (previous_bounds.size() != bounds_.size() &&
!layer_helper_->layer_updated_externally()) {
// If our bounds have changed then we need to update the complete
// texture.
layer_helper_->set_needs_paint_all(true);
}
} else if (GetCompositor()) {
// If our bounds have changed, then any descendant layer bounds may
// have changed. Update them accordingly.
gfx::Point offset;
CalculateOffsetToAncestorWithLayer(&offset, NULL);
// CalculateOffsetToAncestorWithLayer includes our location as does
// UpdateLayerBounds.
offset.Offset(-x(), -y());
UpdateLayerBounds(offset);
}
}
}
OnBoundsChanged(previous_bounds);
if (previous_bounds.size() != size()) {
needs_layout_ = false;
Layout();
}
if (NeedsNotificationWhenVisibleBoundsChange()) {
OnVisibleBoundsChanged();
}
// Notify interested Views that visible bounds within the root view may have
// changed.
if (descendants_to_notify_.get()) {
for (Views::iterator i(descendants_to_notify_->begin());
i != descendants_to_notify_->end(); ++i) {
(*i)->OnVisibleBoundsChanged();
}
}
}
// static
void View::RegisterChildrenForVisibleBoundsNotification(View* view) {
if (view->NeedsNotificationWhenVisibleBoundsChange())
view->RegisterForVisibleBoundsNotification();
for (int i = 0; i < view->child_count(); ++i)
RegisterChildrenForVisibleBoundsNotification(view->child_at(i));
}
// static
void View::UnregisterChildrenForVisibleBoundsNotification(View* view) {
if (view->NeedsNotificationWhenVisibleBoundsChange())
view->UnregisterForVisibleBoundsNotification();
for (int i = 0; i < view->child_count(); ++i)
UnregisterChildrenForVisibleBoundsNotification(view->child_at(i));
}
void View::RegisterForVisibleBoundsNotification() {
if (registered_for_visible_bounds_notification_)
return;
registered_for_visible_bounds_notification_ = true;
for (View* ancestor = parent_; ancestor; ancestor = ancestor->parent_)
ancestor->AddDescendantToNotify(this);
}
void View::UnregisterForVisibleBoundsNotification() {
if (!registered_for_visible_bounds_notification_)
return;
registered_for_visible_bounds_notification_ = false;
for (View* ancestor = parent_; ancestor; ancestor = ancestor->parent_)
ancestor->RemoveDescendantToNotify(this);
}
void View::AddDescendantToNotify(View* view) {
DCHECK(view);
if (!descendants_to_notify_.get())
descendants_to_notify_.reset(new Views);
descendants_to_notify_->push_back(view);
}
void View::RemoveDescendantToNotify(View* view) {
DCHECK(view && descendants_to_notify_.get());
Views::iterator i(std::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();
}
// Transformations -------------------------------------------------------------
bool View::GetTransformRelativeTo(const View* ancestor,
ui::Transform* transform) const {
const View* p = this;
while (p && p != ancestor) {
if (p->transform())
transform->ConcatTransform(*p->transform());
transform->ConcatTranslate(static_cast<float>(p->GetMirroredX()),
static_cast<float>(p->y()));
p = p->parent_;
}
return p == ancestor;
}
// Coordinate conversion -------------------------------------------------------
// 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);
if (src == NULL || src->Contains(dst)) {
dst->ConvertPointFromAncestor(src, point);
if (!src) {
const Widget* widget = dst->GetWidget();
if (widget) {
gfx::Rect b = widget->GetClientAreaScreenBounds();
point->SetPoint(point->x() - b.x(), point->y() - b.y());
}
}
} else if (src && try_other_direction) {
if (!src->ConvertPointForAncestor(dst, point)) {
// |src| is not an ancestor of |dst|, and |dst| is not an ancestor of
// |src| either. At this stage, |point| is in the widget's coordinate
// system. So convert from the widget's to |dst|'s coordinate system now.
ConvertPointFromWidget(dst, point);
}
}
}
bool View::ConvertPointForAncestor(const View* ancestor,
gfx::Point* point) const {
ui::Transform trans;
// TODO(sad): Have some way of caching the transformation results.
bool result = GetTransformRelativeTo(ancestor, &trans);
gfx::Point3f p(*point);
trans.TransformPoint(p);
*point = p.AsPoint();
return result;
}
bool View::ConvertPointFromAncestor(const View* ancestor,
gfx::Point* point) const {
ui::Transform trans;
bool result = GetTransformRelativeTo(ancestor, &trans);
gfx::Point3f p(*point);
trans.TransformPointReverse(p);
*point = p.AsPoint();
return result;
}
// Accelerated painting --------------------------------------------------------
bool View::ShouldPaintToLayer() const {
return use_acceleration_when_possible &&
layer_helper_.get() && layer_helper_->ShouldPaintToLayer();
}
void View::CreateLayer() {
if (!ShouldPaintToLayer() || layer())
return;
ui::Compositor* compositor = GetCompositor();
if (!compositor)
return;
DCHECK(layer_helper_.get());
View* ancestor_with_layer = NULL;
gfx::Point offset;
CalculateOffsetToAncestorWithLayer(&offset, &ancestor_with_layer);
DCHECK(ancestor_with_layer || parent_ == NULL);
layer_helper_->SetLayer(new ui::Layer(compositor));
layer()->set_bounds(gfx::Rect(offset.x(), offset.y(), width(), height()));
layer()->set_transform(GetTransform());
if (ancestor_with_layer)
ancestor_with_layer->layer()->Add(layer());
layer_helper_->set_bitmap_needs_updating(true);
layer_helper_->set_needs_paint_all(true);
MoveLayerToParent(layer(), gfx::Point());
}
void View::DestroyLayerAndReparent() {
if (!layer())
return;
ui::Layer* new_parent = layer()->parent();
std::vector<ui::Layer*> children = layer()->children();
for (size_t i = 0; i < children.size(); ++i)
new_parent->Add(children[i]);
DestroyLayer();
gfx::Point offset;
CalculateOffsetToAncestorWithLayer(&offset, NULL);
offset.Offset(-x(), -y());
UpdateLayerBounds(offset);
}
void View::DestroyLayer() {
if (!layer_helper_.get())
return;
if (!layer_helper_->property_setter_explicitly_set() && !ShouldPaintToLayer())
layer_helper_.reset();
else
layer_helper_->SetLayer(NULL);
}
// Input -----------------------------------------------------------------------
bool View::ProcessMousePressed(const MouseEvent& event, DragInfo* drag_info) {
const bool enabled = IsEnabled();
int drag_operations =
(enabled && event.IsOnlyLeftMouseButton() && HitTest(event.location())) ?
GetDragOperations(event.location()) : 0;
ContextMenuController* context_menu_controller = event.IsRightMouseButton() ?
context_menu_controller_ : 0;
const bool result = OnMousePressed(event);
// WARNING: we may have been deleted, don't use any View variables.
if (!enabled)
return result;
if (drag_operations != ui::DragDropTypes::DRAG_NONE) {
drag_info->PossibleDrag(event.location());
return true;
}
return !!context_menu_controller || result;
}
bool View::ProcessMouseDragged(const MouseEvent& event, 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_pt.x() - event.x(),
drag_info->start_pt.y() - event.y())) {
if (!drag_controller_ ||
drag_controller_->CanStartDragForView(
this, drag_info->start_pt, event.location()))
DoDrag(event, drag_info->start_pt);
} else {
if (OnMouseDragged(event))
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& event) {
if (context_menu_controller_ && event.IsOnlyRightMouseButton()) {
// Assume that if there is a context menu controller we won't be deleted
// from mouse released.
gfx::Point location(event.location());
OnMouseReleased(event);
if (HitTest(location)) {
ConvertPointToScreen(this, &location);
ShowContextMenu(location, true);
}
} else {
OnMouseReleased(event);
}
// WARNING: we may have been deleted.
}
ui::TouchStatus View::ProcessTouchEvent(const TouchEvent& event) {
// TODO(rjkroege): Implement a grab scheme similar to as
// as is found in MousePressed.
return OnTouchEvent(event);
}
// Accelerators ----------------------------------------------------------------
void View::RegisterPendingAccelerators() {
if (!accelerators_.get() ||
registered_accelerator_count_ == accelerators_->size()) {
// No accelerators are waiting for registration.
return;
}
if (!GetWidget()) {
// The view is not yet attached to a widget, defer registration until then.
return;
}
accelerator_focus_manager_ = GetFocusManager();
if (!accelerator_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.
// TODO(jcampan): This fails for a view under NativeWidgetGtk with
// TYPE_CHILD. (see http://crbug.com/21335) reenable
// NOTREACHED assertion and verify accelerators works as
// expected.
#if defined(OS_WIN)
NOTREACHED();
#endif
return;
}
// Only register accelerators if we are visible.
if (!IsVisibleInRootView())
return;
for (std::vector<Accelerator>::const_iterator i(
accelerators_->begin() + registered_accelerator_count_);
i != accelerators_->end(); ++i) {
accelerator_focus_manager_->RegisterAccelerator(*i, this);
}
registered_accelerator_count_ = accelerators_->size();
}
void View::UnregisterAccelerators(bool leave_data_intact) {
if (!accelerators_.get())
return;
if (GetWidget()) {
if (accelerator_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.
accelerator_focus_manager_->UnregisterAccelerators(this);
accelerator_focus_manager_ = NULL;
}
if (!leave_data_intact) {
accelerators_->clear();
accelerators_.reset();
}
registered_accelerator_count_ = 0;
}
}
// Focus -----------------------------------------------------------------------
void View::InitFocusSiblings(View* v, int index) {
int count = child_count();
if (count == 0) {
v->next_focusable_view_ = NULL;
v->previous_focusable_view_ = NULL;
} else {
if (index == 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 (Views::iterator i(children_.begin()); i != children_.end(); ++i) {
if (!(*i)->next_focusable_view_) {
last_focusable_view = *i;
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 = children_[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 = children_[index]->GetPreviousFocusableView();
v->previous_focusable_view_ = prev;
v->next_focusable_view_ = children_[index];
if (prev)
prev->next_focusable_view_ = v;
children_[index]->previous_focusable_view_ = v;
}
}
}
// System events ---------------------------------------------------------------
void View::PropagateThemeChanged() {
for (int i = child_count() - 1; i >= 0; --i)
child_at(i)->PropagateThemeChanged();
OnThemeChanged();
}
void View::PropagateLocaleChanged() {
for (int i = child_count() - 1; i >= 0; --i)
child_at(i)->PropagateLocaleChanged();
OnLocaleChanged();
}
// Tooltips --------------------------------------------------------------------
void View::UpdateTooltip() {
Widget* widget = GetWidget();
// TODO(beng): The TooltipManager NULL check can be removed when we
// consolidate Init() methods and make views_unittests Init() all
// Widgets that it uses.
if (widget && widget->native_widget_private()->GetTooltipManager())
widget->native_widget_private()->GetTooltipManager()->UpdateTooltip();
}
// Drag and drop ---------------------------------------------------------------
void View::DoDrag(const MouseEvent& event, const gfx::Point& press_pt) {
int drag_operations = GetDragOperations(press_pt);
if (drag_operations == ui::DragDropTypes::DRAG_NONE)
return;
OSExchangeData data;
WriteDragData(press_pt, &data);
// 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.
GetWidget()->RunShellDrag(this, data, drag_operations);
}
// Debugging -------------------------------------------------------------------
#if defined(TOUCH_DEBUG)
std::string View::PrintViewGraph(bool first) {
// 64-bit pointer = 16 bytes of hex + "0x" + '\0' = 19.
const size_t kMaxPointerStringLength = 19;
std::string result;
if (first)
result.append("digraph {\n");
// Node characteristics.
char p[kMaxPointerStringLength];
size_t baseNameIndex = GetClassName().find_last_of('/');
if (baseNameIndex == std::string::npos)
baseNameIndex = 0;
else
baseNameIndex++;
// Information about current node.
snprintf(p, kMaxPointerStringLength, "%p", this);
result.append(" N");
result.append(p+2);
result.append(" [label=\"");
result.append(GetClassName().substr(baseNameIndex).c_str());
result.append("\"");
if (!parent_)
result.append(", shape=box");
if (layer())
result.append(", color=green");
result.append("]\n");
// Link to parent.
if (parent_) {
char pp[kMaxPointerStringLength];
snprintf(pp, kMaxPointerStringLength, "%p", parent_);
result.append(" N");
result.append(pp+2);
result.append(" -> N");
result.append(p+2);
result.append("\n");
}
// Children.
for (int i = 0, count = child_count(); i < count; ++i)
result.append(child_at(i)->PrintViewGraph(false));
if (first)
result.append("}\n");
return result;
}
#endif
} // namespace views