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1 // Copyright 2016 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_COMMON_PALETTE_DELEGATE_H_ | |
6 #define ASH_COMMON_PALETTE_DELEGATE_H_ | |
7 | |
8 #include "ash/ash_export.h" | |
9 #include "base/callback.h" | |
10 #include "base/callback_list.h" | |
11 #include "base/macros.h" | |
12 #include "ui/events/devices/stylus_state.h" | |
13 | |
14 namespace ash { | |
15 | |
16 // This delegate allows the UI code in ash, e.g. |PaletteTray|, to perform | |
17 // Chrome-specific actions. | |
18 class PaletteDelegate { | |
19 public: | |
20 using EnableListener = base::Callback<void(bool)>; | |
21 using EnableListenerSubscription = | |
22 base::CallbackList<void(bool)>::Subscription; | |
23 | |
24 virtual ~PaletteDelegate() {} | |
25 | |
26 // Sets callback function that will receive the current state of the palette | |
27 // enabled pref. The callback will be invoked once the initial pref value is | |
28 // available. | |
29 virtual std::unique_ptr<EnableListenerSubscription> AddPaletteEnableListener( | |
30 const EnableListener& on_state_changed) = 0; | |
31 | |
32 // Create a new note. | |
33 virtual void CreateNote() = 0; | |
34 | |
35 // Returns true if there is a note-taking application available. | |
36 virtual bool HasNoteApp() = 0; | |
37 | |
38 // Returns true if the palette should be automatically opened on an eject | |
39 // event. | |
40 virtual bool ShouldAutoOpenPalette() = 0; | |
41 | |
42 // Returns true if the palette should be displayed. This is the one-shot | |
43 // equivalent to AddPaletteEnableListener. | |
44 virtual bool ShouldShowPalette() = 0; | |
45 | |
46 // Take a screenshot of the entire window. | |
47 virtual void TakeScreenshot() = 0; | |
48 | |
49 // Take a screenshot of a user-selected region. |done| is called when the | |
50 // partial screenshot session has finished; a screenshot may or may not have | |
51 // been taken. | |
52 virtual void TakePartialScreenshot(const base::Closure& done) = 0; | |
53 | |
54 // Cancels any active partial screenshot session. | |
55 virtual void CancelPartialScreenshot() = 0; | |
56 | |
57 private: | |
58 DISALLOW_ASSIGN(PaletteDelegate); | |
59 }; | |
60 | |
61 } // namespace ash | |
62 | |
63 #endif // ASH_COMMON_PALETTE_DELEGATE_H_ | |
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