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// Copyright 2013 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 "ash/wm/caption_buttons/alternate_frame_size_button.h"
#include "ash/metrics/user_metrics_recorder.h"
#include "ash/shell.h"
#include "ash/touch/touch_uma.h"
#include "ash/wm/window_state.h"
#include "ash/wm/workspace/snap_sizer.h"
#include "ui/gfx/vector2d.h"
#include "ui/views/widget/widget.h"
namespace {
// The default delay between the user pressing the size button and the buttons
// adjacent to the size button morphing into buttons for snapping left and
// right.
const int kSetButtonsToSnapModeDelayMs = 150;
// The amount that a user can overshoot the snap left / snap right button and
// keep the snap left / snap right button pressed.
const int kPressedHitBoundsExpandX = 200;
const int kPressedHitBoundsExpandY = 50;
} // namespace
namespace ash {
AlternateFrameSizeButton::AlternateFrameSizeButton(
views::ButtonListener* listener,
views::Widget* frame,
AlternateFrameSizeButtonDelegate* delegate)
: FrameCaptionButton(listener, CAPTION_BUTTON_ICON_MAXIMIZE_RESTORE),
frame_(frame),
delegate_(delegate),
set_buttons_to_snap_mode_delay_ms_(kSetButtonsToSnapModeDelayMs),
in_snap_mode_(false),
snap_type_(SNAP_NONE) {
}
AlternateFrameSizeButton::~AlternateFrameSizeButton() {
}
bool AlternateFrameSizeButton::OnMousePressed(const ui::MouseEvent& event) {
// The minimize and close buttons are set to snap left and right when snapping
// is enabled. Do not enable snapping if the minimize button is not visible.
// The close button is always visible.
if (IsTriggerableEvent(event) &&
!in_snap_mode_ &&
delegate_->IsMinimizeButtonVisible()) {
StartSetButtonsToSnapModeTimer(event);
}
FrameCaptionButton::OnMousePressed(event);
return true;
}
bool AlternateFrameSizeButton::OnMouseDragged(const ui::MouseEvent& event) {
UpdatePressedButton(event);
FrameCaptionButton::OnMouseDragged(event);
return true;
}
void AlternateFrameSizeButton::OnMouseReleased(const ui::MouseEvent& event) {
if (!IsTriggerableEvent(event) || !CommitSnap(event))
FrameCaptionButton::OnMouseReleased(event);
}
void AlternateFrameSizeButton::OnMouseCaptureLost() {
SetButtonsToNormalMode(AlternateFrameSizeButtonDelegate::ANIMATE_YES);
FrameCaptionButton::OnMouseCaptureLost();
}
void AlternateFrameSizeButton::OnGestureEvent(ui::GestureEvent* event) {
if (event->details().touch_points() > 1) {
SetButtonsToNormalMode(AlternateFrameSizeButtonDelegate::ANIMATE_YES);
return;
}
if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
StartSetButtonsToSnapModeTimer(*event);
// Go through FrameCaptionButton's handling so that the button gets pressed.
FrameCaptionButton::OnGestureEvent(event);
return;
}
if (event->type() == ui::ET_GESTURE_SCROLL_BEGIN ||
event->type() == ui::ET_GESTURE_SCROLL_UPDATE) {
UpdatePressedButton(*event);
event->SetHandled();
return;
}
if (event->type() == ui::ET_GESTURE_TAP ||
event->type() == ui::ET_GESTURE_SCROLL_END ||
event->type() == ui::ET_SCROLL_FLING_START ||
event->type() == ui::ET_GESTURE_END) {
if (CommitSnap(*event)) {
if (event->type() == ui::ET_GESTURE_TAP) {
TouchUMA::GetInstance()->RecordGestureAction(
TouchUMA::GESTURE_FRAMEMAXIMIZE_TAP);
}
event->SetHandled();
return;
}
}
FrameCaptionButton::OnGestureEvent(event);
}
void AlternateFrameSizeButton::StartSetButtonsToSnapModeTimer(
const ui::LocatedEvent& event) {
set_buttons_to_snap_mode_timer_event_location_ = event.location();
if (set_buttons_to_snap_mode_delay_ms_ == 0) {
SetButtonsToSnapMode();
} else {
set_buttons_to_snap_mode_timer_.Start(
FROM_HERE,
base::TimeDelta::FromMilliseconds(set_buttons_to_snap_mode_delay_ms_),
this,
&AlternateFrameSizeButton::SetButtonsToSnapMode);
}
}
void AlternateFrameSizeButton::SetButtonsToSnapMode() {
if (in_snap_mode_)
return;
in_snap_mode_ = true;
delegate_->SetButtonIcons(CAPTION_BUTTON_ICON_LEFT_SNAPPED,
CAPTION_BUTTON_ICON_RIGHT_SNAPPED,
AlternateFrameSizeButtonDelegate::ANIMATE_YES);
}
void AlternateFrameSizeButton::UpdatePressedButton(
const ui::LocatedEvent& event) {
if (!in_snap_mode_) {
// Set the buttons adjacent to the size button to snap left and right early
// if the user drags past the drag threshold.
// |set_buttons_to_snap_mode_timer_| is checked to avoid entering the snap
// mode as a result of an unsupported drag type (e.g. only the right mouse
// button is pressed).
gfx::Vector2d delta(
event.location() - set_buttons_to_snap_mode_timer_event_location_);
if (!set_buttons_to_snap_mode_timer_.IsRunning() ||
!views::View::ExceededDragThreshold(delta)) {
return;
}
SetButtonsToSnapMode();
}
gfx::Point event_location_in_screen(event.location());
views::View::ConvertPointToScreen(this, &event_location_in_screen);
gfx::Insets pressed_button_hittest_insets(-kPressedHitBoundsExpandY,
-kPressedHitBoundsExpandX,
-kPressedHitBoundsExpandY,
-kPressedHitBoundsExpandX);
const FrameCaptionButton* pressed_button = delegate_->PressButtonAt(
event_location_in_screen, pressed_button_hittest_insets);
snap_type_ = SNAP_NONE;
if (pressed_button) {
switch (pressed_button->icon()) {
case CAPTION_BUTTON_ICON_LEFT_SNAPPED:
snap_type_ = SNAP_LEFT;
break;
case CAPTION_BUTTON_ICON_RIGHT_SNAPPED:
snap_type_ = SNAP_RIGHT;
break;
case CAPTION_BUTTON_ICON_MAXIMIZE_RESTORE:
// snap_type_ = SNAP_NONE
break;
case CAPTION_BUTTON_ICON_MINIMIZE:
case CAPTION_BUTTON_ICON_CLOSE:
NOTREACHED();
break;
}
}
}
bool AlternateFrameSizeButton::CommitSnap(const ui::LocatedEvent& event) {
// The position of |event| may be different than the position of the previous
// event.
UpdatePressedButton(event);
if (in_snap_mode_ &&
(snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT)) {
using internal::SnapSizer;
SnapSizer::SnapWindow(ash::wm::GetWindowState(frame_->GetNativeWindow()),
snap_type_ == SNAP_LEFT ?
SnapSizer::LEFT_EDGE : SnapSizer::RIGHT_EDGE);
ash::Shell::GetInstance()->metrics()->RecordUserMetricsAction(
snap_type_ == SNAP_LEFT ?
ash::UMA_WINDOW_MAXIMIZE_BUTTON_MAXIMIZE_LEFT :
ash::UMA_WINDOW_MAXIMIZE_BUTTON_MAXIMIZE_RIGHT);
SetButtonsToNormalMode(AlternateFrameSizeButtonDelegate::ANIMATE_NO);
return true;
}
SetButtonsToNormalMode(AlternateFrameSizeButtonDelegate::ANIMATE_YES);
return false;
}
void AlternateFrameSizeButton::SetButtonsToNormalMode(
AlternateFrameSizeButtonDelegate::Animate animate) {
in_snap_mode_ = false;
snap_type_ = SNAP_NONE;
set_buttons_to_snap_mode_timer_.Stop();
delegate_->SetButtonsToNormal(animate);
}
} // namespace ash
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