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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// Copyright (c) 2010 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 VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
#define VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
#pragma once
#include "third_party/skia/include/core/SkBitmap.h"
#include "views/controls/button/custom_button.h"
namespace views {
// An image button.
// Note that this type of button is not focusable by default and will not be
// part of the focus chain. Call SetFocusable(true) to make it part of the
// focus chain.
class ImageButton : public CustomButton {
public:
explicit ImageButton(ButtonListener* listener);
virtual ~ImageButton();
// Set the image the button should use for the provided state.
virtual void SetImage(ButtonState aState, const SkBitmap* anImage);
// Set the background details.
void SetBackground(SkColor color,
const SkBitmap* image,
const SkBitmap* mask);
enum HorizontalAlignment { ALIGN_LEFT = 0,
ALIGN_CENTER,
ALIGN_RIGHT, };
enum VerticalAlignment { ALIGN_TOP = 0,
ALIGN_MIDDLE,
ALIGN_BOTTOM };
// Sets how the image is laid out within the button's bounds.
void SetImageAlignment(HorizontalAlignment h_align,
VerticalAlignment v_align);
// Overridden from View:
virtual gfx::Size GetPreferredSize();
virtual void Paint(gfx::Canvas* canvas);
// Sets preferred size, so it could be correctly positioned in layout even if
// it is NULL.
void SetPreferredSize(const gfx::Size& preferred_size) {
preferred_size_ = preferred_size;
}
protected:
// Returns the image to paint. This is invoked from paint and returns a value
// from images.
virtual SkBitmap GetImageToPaint();
// The images used to render the different states of this button.
SkBitmap images_[BS_COUNT];
// The background image.
SkBitmap background_image_;
private:
// Image alignment.
HorizontalAlignment h_alignment_;
VerticalAlignment v_alignment_;
gfx::Size preferred_size_;
DISALLOW_COPY_AND_ASSIGN(ImageButton);
};
////////////////////////////////////////////////////////////////////////////////
//
// ToggleImageButton
//
// A toggle-able ImageButton. It swaps out its graphics when toggled.
//
////////////////////////////////////////////////////////////////////////////////
class ToggleImageButton : public ImageButton {
public:
explicit ToggleImageButton(ButtonListener* listener);
virtual ~ToggleImageButton();
// Change the toggled state.
void SetToggled(bool toggled);
// Like ImageButton::SetImage(), but to set the graphics used for the
// "has been toggled" state. Must be called for each button state
// before the button is toggled.
void SetToggledImage(ButtonState state, const SkBitmap* image);
// Set the tooltip text displayed when the button is toggled.
void SetToggledTooltipText(const std::wstring& tooltip);
// Overridden from ImageButton:
virtual void SetImage(ButtonState aState, const SkBitmap* anImage);
// Overridden from View:
virtual bool GetTooltipText(const gfx::Point& p, std::wstring* tooltip);
private:
// The parent class's images_ member is used for the current images,
// and this array is used to hold the alternative images.
// We swap between the two when toggling.
SkBitmap alternate_images_[BS_COUNT];
// True if the button is currently toggled.
bool toggled_;
// The parent class's tooltip_text_ is displayed when not toggled, and
// this one is shown when toggled.
std::wstring toggled_tooltip_text_;
DISALLOW_COPY_AND_ASSIGN(ToggleImageButton);
};
} // namespace views
#endif // VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
|
