Index: ash/wm/overview/overview_window_drag_controller.cc |
diff --git a/ash/wm/overview/overview_window_drag_controller.cc b/ash/wm/overview/overview_window_drag_controller.cc |
new file mode 100644 |
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+++ b/ash/wm/overview/overview_window_drag_controller.cc |
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+// Copyright 2017 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/overview/overview_window_drag_controller.h" |
+ |
+#include "ash/screen_util.h" |
+#include "ash/shell.h" |
+#include "ash/wm/overview/scoped_transform_overview_window.h" |
+#include "ash/wm/overview/window_selector.h" |
+#include "ash/wm/overview/window_selector_item.h" |
+#include "ash/wm/window_positioning_utils.h" |
+#include "ash/wm/window_state.h" |
+#include "ash/wm/wm_event.h" |
+#include "ash/wm/workspace/phantom_window_controller.h" |
+#include "ui/aura/window.h" |
+#include "ui/wm/core/coordinate_conversion.h" |
+ |
+namespace ash { |
+ |
+namespace { |
+ |
+// The minimum offset that will be considered as a drag event. |
+constexpr int kMinimiumDragOffset = 5; |
+ |
+// Snapping distance between the dragged window with the screen edge. It's |
+// useful especially for touch events. |
+constexpr int kScreenEdgeInsetForDrag = 200; |
+ |
+} // namespace |
+ |
+OverviewWindowDragController::OverviewWindowDragController( |
+ WindowSelector* window_selector) |
+ : window_selector_(window_selector), |
+ split_view_controller_(Shell::Get()->split_view_controller()) {} |
+ |
+OverviewWindowDragController::~OverviewWindowDragController() {} |
+ |
+void OverviewWindowDragController::InitiateDrag( |
+ WindowSelectorItem* item, |
+ const gfx::Point& location_in_screen) { |
+ previous_event_location_ = location_in_screen; |
+ item_ = item; |
+} |
+ |
+void OverviewWindowDragController::Drag(const gfx::Point& location_in_screen) { |
+ if (!did_move_ && |
+ (std::abs(location_in_screen.x() - previous_event_location_.x()) < |
+ kMinimiumDragOffset || |
+ std::abs(location_in_screen.y() - previous_event_location_.y()) < |
+ kMinimiumDragOffset)) { |
+ return; |
+ } |
+ did_move_ = true; |
+ |
+ // Update the dragged |item_|'s bounds accordingly. |
+ gfx::Rect bounds(item_->target_bounds()); |
+ bounds.Offset(location_in_screen.x() - previous_event_location_.x(), |
+ location_in_screen.y() - previous_event_location_.y()); |
+ item_->SetBounds(bounds, OverviewAnimationType::OVERVIEW_ANIMATION_NONE); |
+ previous_event_location_ = location_in_screen; |
+ |
+ UpdatePhantomWindow(location_in_screen); |
+} |
+ |
+void OverviewWindowDragController::CompleteDrag() { |
+ phantom_window_controller_.reset(); |
+ |
+ if (!did_move_) { |
+ // If no drag was initiated (e.g., a click/tap on the overview window), |
+ // activate the window. If the split view is active and has a left window, |
+ // snap the current window to right. If the split view is active and has a |
+ // right window, snap the current window to left. |
+ SplitViewController::State split_state = split_view_controller_->state(); |
+ if (split_state == SplitViewController::NO_SNAP) { |
+ window_selector_->SelectWindow(item_); |
+ } else { |
+ SnapWindow(split_state == SplitViewController::LEFT_SNAPPED |
+ ? SplitViewController::RIGHT |
+ : SplitViewController::LEFT); |
+ } |
+ } else { |
+ // If the window was dragged around but should not be snapped, move it back |
+ // to overview window grid. |
+ if (snap_position_ == SplitViewController::NONE) |
+ window_selector_->PositionWindows(true /* animate */); |
+ else |
+ SnapWindow(snap_position_); |
+ did_move_ = false; |
+ } |
+} |
+ |
+void OverviewWindowDragController::UpdatePhantomWindow( |
+ const gfx::Point& location_in_screen) { |
+ SplitViewController::SnapPosition last_snap_position = snap_position_; |
+ snap_position_ = GetSnapPosition(location_in_screen); |
+ if (snap_position_ == SplitViewController::NONE || |
+ snap_position_ != last_snap_position) { |
+ phantom_window_controller_.reset(); |
+ if (snap_position_ == SplitViewController::NONE) |
+ return; |
+ } |
+ |
+ const bool can_snap = snap_position_ != SplitViewController::NONE && |
+ wm::GetWindowState(item_->GetWindow())->CanSnap(); |
+ if (!can_snap) { |
+ snap_position_ = SplitViewController::NONE; |
+ phantom_window_controller_.reset(); |
+ return; |
+ } |
+ |
+ aura::Window* target_window = item_->GetWindow(); |
+ gfx::Rect phantom_bounds_in_screen = |
+ split_view_controller_->GetSnappedWindowBoundsInScreen(target_window, |
+ snap_position_); |
+ |
+ if (!phantom_window_controller_) { |
+ phantom_window_controller_ = |
+ base::MakeUnique<PhantomWindowController>(target_window); |
+ } |
+ phantom_window_controller_->Show(phantom_bounds_in_screen); |
+} |
+ |
+SplitViewController::SnapPosition OverviewWindowDragController::GetSnapPosition( |
+ const gfx::Point& location_in_screen) const { |
+ gfx::Rect area( |
+ ScreenUtil::GetDisplayWorkAreaBoundsInParent(item_->GetWindow())); |
+ ::wm::ConvertRectToScreen(item_->GetWindow()->GetRootWindow(), &area); |
+ area.Inset(kScreenEdgeInsetForDrag, 0); |
+ |
+ if (location_in_screen.x() <= area.x()) |
+ return SplitViewController::LEFT; |
+ if (location_in_screen.x() >= area.right() - 1) |
+ return SplitViewController::RIGHT; |
+ return SplitViewController::NONE; |
+} |
+ |
+void OverviewWindowDragController::SnapWindow( |
+ SplitViewController::SnapPosition snap_position) { |
+ DCHECK_NE(snap_position, SplitViewController::NONE); |
+ |
+ item_->EnsureVisible(); |
+ item_->RestoreWindow(); |
+ |
+ // |item_| will be deleted after RemoveWindowSelectorItem(). |
+ aura::Window* window = item_->GetWindow(); |
+ window_selector_->RemoveWindowSelectorItem(item_); |
+ |
+ // Note: SnapWindow() might end of overview mode if two windows are snapped to |
+ // both side of the screen. |
+ split_view_controller_->SnapWindow(window, snap_position); |
+ item_ = nullptr; |
+} |
+ |
+} // namespace ash |