1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef ASH_WM_LOCK_WINDOW_STATE_H_ 6 #define ASH_WM_LOCK_WINDOW_STATE_H_ 7 8 #include "ash/wm/window_state.h" 9 10 namespace ash { 11 12 // The LockWindowState implementation which reduces all possible window 13 // states to maximized (or normal if can't be maximized)/minimized/full-screen 14 // and is applied only on lock (login) window container. 15 // LockWindowState implements Ash behavior without state machine. 16 class LockWindowState : public wm::WindowState::State { 17 public: 18 // The |window|'s state object will be modified to use this new window mode 19 // state handler. 20 explicit LockWindowState(aura::Window* window); 21 virtual ~LockWindowState(); 22 23 // WindowState::State overrides: 24 virtual void OnWMEvent(wm::WindowState* window_state, 25 const wm::WMEvent* event) OVERRIDE; 26 virtual wm::WindowStateType GetType() const OVERRIDE; 27 virtual void AttachState(wm::WindowState* window_state, 28 wm::WindowState::State* previous_state) OVERRIDE; 29 virtual void DetachState(wm::WindowState* window_state) OVERRIDE; 30 31 // Creates new LockWindowState instance and attaches it to |window|. 32 static wm::WindowState* SetLockWindowState(aura::Window* window); 33 34 private: 35 // Updates the window to |new_state_type| and resulting bounds: 36 // Either full screen, maximized centered or minimized. If the state does not 37 // change, only the bounds will be changed. 38 void UpdateWindow(wm::WindowState* window_state, 39 wm::WindowStateType new_state_type); 40 41 // Depending on the capabilities of the window we either return 42 // |WINDOW_STATE_TYPE_MAXIMIZED| or |WINDOW_STATE_TYPE_NORMAL|. 43 wm::WindowStateType GetMaximizedOrCenteredWindowType( 44 wm::WindowState* window_state); 45 46 // Updates the bounds taking virtual keyboard bounds into consideration. 47 void UpdateBounds(wm::WindowState* window_state); 48 49 // The current state type. Due to the nature of this state, this can only be 50 // WM_STATE_TYPE{NORMAL, MINIMIZED, MAXIMIZED}. 51 wm::WindowStateType current_state_type_; 52 53 DISALLOW_COPY_AND_ASSIGN(LockWindowState); 54 }; 55 56 } // namespace ash 57 58 #endif // ASH_WM_LOCK_WINDOW_STATE_H_ 59
