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
|
// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_VIEWS_COMBO_BOX_H__
#define CHROME_VIEWS_COMBO_BOX_H__
#include "chrome/views/native_control.h"
namespace ChromeViews {
////////////////////////////////////////////////////////////////////////////////
//
// ComboBox is a basic non editable combo box. It is initialized from a simple
// model.
//
////////////////////////////////////////////////////////////////////////////////
class ComboBox : public NativeControl {
public:
class Model {
public:
// Return the number of items in the combo box.
virtual int GetItemCount(ComboBox* source) = 0;
// Return the string that should be used to represent a given item.
virtual std::wstring GetItemAt(ComboBox* source, int index) = 0;
};
class Listener {
public:
// This is invoked once the selected item changed.
virtual void ItemChanged(ComboBox* combo_box,
int prev_index,
int new_index) = 0;
};
// |model is not owned by the combo box.
explicit ComboBox(Model* model);
virtual ~ComboBox();
// Register |listener| for item change events.
void SetListener(Listener* listener);
// Overriden from View.
virtual void GetPreferredSize(CSize* out);
// Overriden from NativeControl
virtual HWND CreateNativeControl(HWND parent_container);
virtual LRESULT OnCommand(UINT code, int id, HWND source);
virtual LRESULT OnNotify(int w_param, LPNMHDR l_param);
// Inform the combo box that its model changed.
void ModelChanged();
// Set / Get the selected item.
void SetSelectedItem(int index);
int GetSelectedItem();
private:
// Update a combo box from our model.
void UpdateComboBoxFromModel(HWND hwnd);
// Our model.
Model* model_;
// The current selection.
int selected_item_;
// Item change listener.
Listener* listener_;
// The min width, in pixels, for the text content.
int content_width_;
DISALLOW_EVIL_CONSTRUCTORS(ComboBox);
};
}
#endif // CHROME_VIEWS_COMBO_BOX_H__
|
