blob: be9088d2dc2b5541a2ae31bfe3bf0f120a554ba0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
// Copyright 2013 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 UI_VIEWS_COREWM_TOOLTIP_WIN_H_
#define UI_VIEWS_COREWM_TOOLTIP_WIN_H_
#include <windows.h> // Must come before other Windows system headers.
#include <commctrl.h>
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/optional.h"
#include "base/win/scoped_gdi_object.h"
#include "ui/gfx/geometry/point.h"
#include "ui/views/corewm/tooltip.h"
namespace views {
namespace corewm {
// Implementation of Tooltip that uses the native win32 control for showing the
// tooltip.
class VIEWS_EXPORT TooltipWin : public Tooltip {
public:
explicit TooltipWin(HWND parent);
~TooltipWin() override;
// HandleNotify() is forwarded from DesktopWindowTreeHostWin to keep the
// native tooltip in sync.
bool HandleNotify(int w_param, NMHDR* l_param, LRESULT* l_result);
private:
// Ensures |tooltip_hwnd_| is valid. Returns true if valid, false if there
// a problem creating |tooltip_hwnd_|.
bool EnsureTooltipWindow();
// Sets the position of the tooltip.
void PositionTooltip();
// Might override the font size for localization (e.g. Hindi).
void MaybeOverrideFont();
// Tooltip:
int GetMaxWidth(const gfx::Point& location) const override;
void Update(aura::Window* window,
const std::u16string& tooltip_text,
const TooltipPosition& position) override;
void Show() override;
void Hide() override;
bool IsVisible() override;
// Font we're currently overriding our UI font with.
// Should outlast |tooltip_hwnd_|.
base::win::ScopedHFONT override_font_;
// The window |tooltip_hwnd_| is parented to.
HWND parent_hwnd_;
// Shows the tooltip.
HWND tooltip_hwnd_;
// Used to modify the tooltip.
TOOLINFO toolinfo_;
// Is the tooltip showing?
bool showing_;
// In order to position the tooltip we need to know the size. The size is only
// available from TTN_SHOW, so we have to cache it.
TooltipPosition position_;
// What the scale was the last time we overrode the font, to see if we can
// re-use our previous override.
float override_scale_ = 0.0f;
DISALLOW_COPY_AND_ASSIGN(TooltipWin);
};
} // namespace corewm
} // namespace views
#endif // UI_VIEWS_COREWM_TOOLTIP_WIN_H_
|
