ui/base/resource/material_design/material_design_controller.h

   1 // Copyright 2015 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 UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_
   6 #define UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_
   7
   8 #include "base/macros.h"
   9 #include "ui/base/ui_base_export.h"
  10
  11 namespace ui {
  12
  13 namespace test {
  14 class MaterialDesignControllerTestAPI;
  15 }  // namespace test
  16
  17 // Central controller to handle material design modes.
  18 class UI_BASE_EXPORT MaterialDesignController {
  19  public:
  20   // The different material design modes.
  21   enum class Mode {
  22     // Basic material design.
  23     MATERIAL,
  24     // Material design targeted at mouse/touch hybrid devices.
  25     MATERIAL_HYBRID,
  26     // Classic, non-material design.
  27     NON_MATERIAL
  28   };
  29
  30   // Get the current Mode that should be used by the system.
  31   static Mode GetMode();
  32
  33  private:
  34   friend class test::MaterialDesignControllerTestAPI;
  35
  36   // Tracks whether |mode_| has been initialized. This is necessary so tests can
  37   // reset the state back to a clean state during tear down.
  38   static bool is_mode_initialized_;
  39
  40   // The current Mode to be used by the system.
  41   static Mode mode_;
  42
  43   // Declarations only. Do not allow construction of an object.
  44   MaterialDesignController();
  45   ~MaterialDesignController();
  46
  47   // Initializes |mode_|.
  48   static void InitializeMode();
  49
  50   // Resets the Mode state to uninitialized. To be used by tests to cleanup
  51   // global state.
  52   static void UninitializeMode();
  53
  54   // Set |mode_| to |mode| and updates |is_mode_initialized_| to true. Can be
  55   // used by tests to directly set the mode.
  56   static void SetMode(Mode mode);
  57
  58   DISALLOW_COPY_AND_ASSIGN(MaterialDesignController);
  59 };
  60
  61 }  // namespace ui
  62
  63 #endif  // UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_