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- // Copyright (c) 2012 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.
- #ifndef ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_
- #define ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_
- #include <memory>
- #include <vector>
- #include "ash/ash_export.h"
- #include "ash/wm/overview/overview_observer.h"
- #include "ash/wm/window_state.h"
- #include "ash/wm/window_state_observer.h"
- #include "base/scoped_multi_source_observation.h"
- #include "base/timer/timer.h"
- #include "ui/aura/window.h"
- #include "ui/aura/window_observer.h"
- #include "ui/gfx/geometry/rect.h"
- #include "ui/views/mouse_watcher.h"
- namespace gfx {
- class PointF;
- }
- namespace views {
- class Widget;
- }
- namespace ash {
- class MultiWindowResizeControllerTest;
- class WorkspaceWindowResizer;
- // MultiWindowResizeController is responsible for determining and showing a
- // widget that allows resizing multiple windows at the same time.
- // MultiWindowResizeController is driven by WorkspaceEventHandler.
- class ASH_EXPORT MultiWindowResizeController
- : public views::MouseWatcherListener,
- public aura::WindowObserver,
- public WindowStateObserver,
- public OverviewObserver {
- public:
- MultiWindowResizeController();
- MultiWindowResizeController(const MultiWindowResizeController&) = delete;
- MultiWindowResizeController& operator=(const MultiWindowResizeController&) =
- delete;
- ~MultiWindowResizeController() override;
- // If necessary, shows the resize widget. |window| is the window the mouse
- // is over, |component| the edge and |point| the location of the mouse.
- void Show(aura::Window* window, int component, const gfx::Point& point);
- // MouseWatcherListener:
- void MouseMovedOutOfHost() override;
- // WindowObserver:
- void OnWindowPropertyChanged(aura::Window* window,
- const void* key,
- intptr_t old) override;
- void OnWindowVisibilityChanged(aura::Window* window, bool visible) override;
- void OnWindowDestroying(aura::Window* window) override;
- // WindowStateObserver:
- void OnPostWindowStateTypeChange(WindowState* window_state,
- chromeos::WindowStateType old_type) override;
- // OverviewObserver:
- void OnOverviewModeStarting() override;
- void OnOverviewModeEndingAnimationComplete(bool canceled) override;
- private:
- friend class MultiWindowResizeControllerTest;
- class ResizeMouseWatcherHost;
- class ResizeView;
- // Two directions resizes happen in.
- enum class Direction {
- kTopBottom,
- kLeftRight,
- };
- // Used to track the two resizable windows and direction.
- struct ResizeWindows {
- ResizeWindows();
- ResizeWindows(const ResizeWindows& other);
- ~ResizeWindows();
- // Returns true if |other| equals this ResizeWindows. This does *not*
- // consider the windows in |other_windows|.
- bool Equals(const ResizeWindows& other) const;
- // Returns true if this ResizeWindows is valid.
- bool is_valid() const { return window1 && window2; }
- // The left/top window to resize.
- aura::Window* window1 = nullptr;
- // Other window to resize.
- aura::Window* window2 = nullptr;
- // Direction
- Direction direction;
- // Windows after |window2| that are to be resized. Determined at the time
- // the resize starts.
- std::vector<aura::Window*> other_windows;
- };
- void CreateMouseWatcher();
- // Returns a ResizeWindows based on the specified arguments. Use is_valid()
- // to test if the return value is a valid multi window resize location.
- ResizeWindows DetermineWindows(aura::Window* window,
- int window_component,
- const gfx::Point& point) const;
- // Variant of DetermineWindows() that uses the current location of the mouse
- // to determine the resize windows.
- ResizeWindows DetermineWindowsFromScreenPoint(aura::Window* window) const;
- // Finds a window by edge (one of the constants HitTestCompat.
- aura::Window* FindWindowByEdge(aura::Window* window_to_ignore,
- int edge_want,
- int x_in_parent,
- int y_in_parent) const;
- // Returns the first window touching |window|.
- aura::Window* FindWindowTouching(aura::Window* window,
- Direction direction) const;
- // Places any windows touching |start| into |others|.
- void FindWindowsTouching(aura::Window* start,
- Direction direction,
- std::vector<aura::Window*>* others) const;
- // Starts/Stops observing |window|.
- void StartObserving(aura::Window* window);
- void StopObserving(aura::Window* window);
- // Check if we're observing |window|.
- bool IsObserving(aura::Window* window) const;
- // Shows the resizer if the mouse is still at a valid location. This is called
- // from the |show_timer_|.
- void ShowIfValidMouseLocation();
- // Shows the widget immediately.
- void ShowNow();
- // Returns true if the widget is showing.
- bool IsShowing() const;
- // Hides the resize widget.
- void Hide();
- // Resets the window resizer and hides the resize widget.
- void ResetResizer();
- // Initiates a resize.
- void StartResize(const gfx::PointF& location_in_screen);
- // Resizes to the new location.
- void Resize(const gfx::PointF& location_in_screen, int event_flags);
- // Completes the resize.
- void CompleteResize();
- // Cancels the resize.
- void CancelResize();
- // Returns the bounds for the resize widget.
- gfx::Rect CalculateResizeWidgetBounds(
- const gfx::PointF& location_in_parent) const;
- // Returns true if |location_in_screen| is over the resize widget.
- bool IsOverResizeWidget(const gfx::Point& location_in_screen) const;
- // Returns true if |location_in_screen| is over the resize windows
- // (or the resize widget itself).
- bool IsOverWindows(const gfx::Point& location_in_screen) const;
- // Returns true if |location_in_screen| is over |component| in |window|.
- bool IsOverComponent(aura::Window* window,
- const gfx::Point& location_in_screen,
- int component) const;
- // Windows and direction to resize.
- ResizeWindows windows_;
- // Timer used before showing.
- base::OneShotTimer show_timer_;
- std::unique_ptr<views::Widget> resize_widget_;
- // If non-null we're in a resize loop.
- std::unique_ptr<WorkspaceWindowResizer> window_resizer_;
- // Mouse coordinate passed to Show() in container's coodinates.
- gfx::Point show_location_in_parent_;
- // Bounds the widget was last shown at in screen coordinates.
- gfx::Rect show_bounds_in_screen_;
- // Used to detect whether the mouse is over the windows. While
- // |resize_widget_| is non-NULL (ie the widget is showing) we ignore calls
- // to Show().
- std::unique_ptr<views::MouseWatcher> mouse_watcher_;
- base::ScopedMultiSourceObservation<aura::Window, aura::WindowObserver>
- window_observations_{this};
- base::ScopedMultiSourceObservation<WindowState, WindowStateObserver>
- window_state_observations_{this};
- };
- } // namespace ash
- #endif // ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_
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