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| 1 // Copyright (c) 2012 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_GFX_DISPLAY_H_ | |
| 6 #define UI_GFX_DISPLAY_H_ | |
| 7 | |
| 8 #include <stdint.h> | |
| 9 | |
| 10 #include "base/compiler_specific.h" | |
| 11 #include "ui/gfx/geometry/rect.h" | |
| 12 #include "ui/gfx/gfx_export.h" | |
| 13 | |
| 14 namespace gfx { | |
| 15 | |
| 16 // This class typically, but does not always, correspond to a physical display | |
| 17 // connected to the system. A fake Display may exist on a headless system, or a | |
| 18 // Display may correspond to a remote, virtual display. | |
| 19 // | |
| 20 // Note: The screen and display currently uses pixel coordinate | |
| 21 // system. For platforms that support DIP (density independent pixel), | |
| 22 // |bounds()| and |work_area| will return values in DIP coordinate | |
| 23 // system, not in backing pixels. | |
| 24 class GFX_EXPORT Display final { | |
| 25 public: | |
| 26 // Screen Rotation in clock-wise degrees. | |
| 27 // This enum corresponds to DisplayRotationDefaultProto::Rotation in | |
| 28 // chrome/browser/chromeos/policy/proto/chrome_device_policy.proto. | |
| 29 enum Rotation { | |
| 30 ROTATE_0 = 0, | |
| 31 ROTATE_90, | |
| 32 ROTATE_180, | |
| 33 ROTATE_270, | |
| 34 }; | |
| 35 | |
| 36 // The display rotation can have multiple causes for change. A user can set a | |
| 37 // preference. On devices with accelerometers, they can change the rotation. | |
| 38 // RotationSource allows for the tracking of a Rotation per source of the | |
| 39 // change. ROTATION_SOURCE_ACTIVE is the current rotation of the display. | |
| 40 // Rotation changes not due to an accelerometer, nor the user, are to use this | |
| 41 // source directly. ROTATION_SOURCE_UNKNOWN is when no rotation source has | |
| 42 // been provided. | |
| 43 enum RotationSource { | |
| 44 ROTATION_SOURCE_ACCELEROMETER = 0, | |
| 45 ROTATION_SOURCE_ACTIVE, | |
| 46 ROTATION_SOURCE_USER, | |
| 47 ROTATION_SOURCE_UNKNOWN, | |
| 48 }; | |
| 49 | |
| 50 // Touch support for the display. | |
| 51 enum TouchSupport { | |
| 52 TOUCH_SUPPORT_UNKNOWN, | |
| 53 TOUCH_SUPPORT_AVAILABLE, | |
| 54 TOUCH_SUPPORT_UNAVAILABLE, | |
| 55 }; | |
| 56 | |
| 57 enum : int64_t { kInvalidDisplayID = -1 }; | |
| 58 | |
| 59 // Creates a display with kInvalidDisplayID as default. | |
| 60 Display(); | |
| 61 explicit Display(int64_t id); | |
| 62 Display(int64_t id, const Rect& bounds); | |
| 63 Display(const Display& other); | |
| 64 ~Display(); | |
| 65 | |
| 66 // Returns the forced device scale factor, which is given by | |
| 67 // "--force-device-scale-factor". | |
| 68 static float GetForcedDeviceScaleFactor(); | |
| 69 | |
| 70 // Indicates if a device scale factor is being explicitly enforced from the | |
| 71 // command line via "--force-device-scale-factor". | |
| 72 static bool HasForceDeviceScaleFactor(); | |
| 73 | |
| 74 // Resets the caches used to determine if a device scale factor is being | |
| 75 // forced from the command line via "--force-device-scale-factor", and thus | |
| 76 // ensures that the command line is reevaluated. | |
| 77 static void ResetForceDeviceScaleFactorForTesting(); | |
| 78 | |
| 79 // Sets/Gets unique identifier associated with the display. | |
| 80 // -1 means invalid display and it doesn't not exit. | |
| 81 int64_t id() const { return id_; } | |
| 82 void set_id(int64_t id) { id_ = id; } | |
| 83 | |
| 84 // Gets/Sets the display's bounds in gfx::Screen's coordinates. | |
| 85 const Rect& bounds() const { return bounds_; } | |
| 86 void set_bounds(const Rect& bounds) { bounds_ = bounds; } | |
| 87 | |
| 88 // Gets/Sets the display's work area in gfx::Screen's coordinates. | |
| 89 const Rect& work_area() const { return work_area_; } | |
| 90 void set_work_area(const Rect& work_area) { work_area_ = work_area; } | |
| 91 | |
| 92 // Output device's pixel scale factor. This specifies how much the | |
| 93 // UI should be scaled when the actual output has more pixels than | |
| 94 // standard displays (which is around 100~120dpi.) The potential return | |
| 95 // values depend on each platforms. | |
| 96 float device_scale_factor() const { return device_scale_factor_; } | |
| 97 void set_device_scale_factor(float scale) { device_scale_factor_ = scale; } | |
| 98 | |
| 99 Rotation rotation() const { return rotation_; } | |
| 100 void set_rotation(Rotation rotation) { rotation_ = rotation; } | |
| 101 int RotationAsDegree() const; | |
| 102 void SetRotationAsDegree(int rotation); | |
| 103 | |
| 104 TouchSupport touch_support() const { return touch_support_; } | |
| 105 void set_touch_support(TouchSupport support) { touch_support_ = support; } | |
| 106 | |
| 107 // Utility functions that just return the size of display and | |
| 108 // work area. | |
| 109 const Size& size() const { return bounds_.size(); } | |
| 110 const Size& work_area_size() const { return work_area_.size(); } | |
| 111 | |
| 112 // Returns the work area insets. | |
| 113 Insets GetWorkAreaInsets() const; | |
| 114 | |
| 115 // Sets the device scale factor and display bounds in pixel. This | |
| 116 // updates the work are using the same insets between old bounds and | |
| 117 // work area. | |
| 118 void SetScaleAndBounds(float device_scale_factor, | |
| 119 const gfx::Rect& bounds_in_pixel); | |
| 120 | |
| 121 // Sets the display's size. This updates the work area using the same insets | |
| 122 // between old bounds and work area. | |
| 123 void SetSize(const gfx::Size& size_in_pixel); | |
| 124 | |
| 125 // Computes and updates the display's work are using | |
| 126 // |work_area_insets| and the bounds. | |
| 127 void UpdateWorkAreaFromInsets(const gfx::Insets& work_area_insets); | |
| 128 | |
| 129 // Returns the display's size in pixel coordinates. | |
| 130 gfx::Size GetSizeInPixel() const; | |
| 131 | |
| 132 // Returns a string representation of the display; | |
| 133 std::string ToString() const; | |
| 134 | |
| 135 // True if the display contains valid display id. | |
| 136 bool is_valid() const { return id_ != kInvalidDisplayID; } | |
| 137 | |
| 138 // True if the display corresponds to internal panel. | |
| 139 bool IsInternal() const; | |
| 140 | |
| 141 // Gets/Sets an id of display corresponding to internal panel. | |
| 142 static int64_t InternalDisplayId(); | |
| 143 static void SetInternalDisplayId(int64_t internal_display_id); | |
| 144 | |
| 145 // Test if the |id| is for the internal display if any. | |
| 146 static bool IsInternalDisplayId(int64_t id); | |
| 147 | |
| 148 // True if there is an internal display. | |
| 149 static bool HasInternalDisplay(); | |
| 150 | |
| 151 // Maximum cursor size in native pixels. | |
| 152 const Size& maximum_cursor_size() const { return maximum_cursor_size_; } | |
| 153 void set_maximum_cursor_size(const Size& size) { | |
| 154 maximum_cursor_size_ = size; | |
| 155 } | |
| 156 | |
| 157 private: | |
| 158 int64_t id_; | |
| 159 Rect bounds_; | |
| 160 Rect work_area_; | |
| 161 float device_scale_factor_; | |
| 162 Rotation rotation_; | |
| 163 TouchSupport touch_support_; | |
| 164 Size maximum_cursor_size_; | |
| 165 }; | |
| 166 | |
| 167 // This is declared here for use in gtest-based unit tests but is defined in | |
| 168 // the gfx_test_support target. Depend on that to use this in your unit test. | |
| 169 // This should not be used in production code - call ToString() instead. | |
| 170 void PrintTo(const Display& display, ::std::ostream* os); | |
| 171 | |
| 172 } // namespace gfx | |
| 173 | |
| 174 #endif // UI_GFX_DISPLAY_H_ | |
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Chromium Code Reviews
Issue 1965073002:
Rename gfx::Display to display::Display (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master