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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/private/dc.h
// Purpose: private wxMSW helpers for working with HDCs
// Author: Vadim Zeitlin
// Created: 2009-06-16 (extracted from src/msw/dc.cpp)
// Copyright: (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _MSW_PRIVATE_DC_H_
#define _MSW_PRIVATE_DC_H_
#include "wx/msw/dc.h"
#include "wx/msw/wrapwin.h"
namespace wxMSWImpl
{
// various classes to change some DC property temporarily
// text background and foreground colours
class wxTextColoursChanger
{
public:
wxTextColoursChanger(HDC hdc, const wxMSWDCImpl& dc)
: m_hdc(hdc)
{
Change(dc.GetTextForeground(), dc.GetTextBackground());
}
wxTextColoursChanger(HDC hdc, const wxColour& colFg, const wxColour& colBg)
: m_hdc(hdc)
{
Change(colFg, colBg);
}
wxTextColoursChanger(HDC hdc, COLORREF colFg, COLORREF colBg)
: m_hdc(hdc)
{
Change(colFg, colBg);
}
~wxTextColoursChanger()
{
if ( m_oldColFg != CLR_INVALID )
::SetTextColor(m_hdc, m_oldColFg);
if ( m_oldColBg != CLR_INVALID )
::SetBkColor(m_hdc, m_oldColBg);
}
protected:
// this ctor doesn't change mode immediately, call Change() later to do it
// only if needed
wxTextColoursChanger(HDC hdc)
: m_hdc(hdc)
{
m_oldColFg =
m_oldColBg = CLR_INVALID;
}
void Change(const wxColour& colFg, const wxColour& colBg)
{
Change(colFg.IsOk() ? colFg.GetPixel() : CLR_INVALID,
colBg.IsOk() ? colBg.GetPixel() : CLR_INVALID);
}
void Change(COLORREF colFg, COLORREF colBg)
{
if ( colFg != CLR_INVALID )
{
m_oldColFg = ::SetTextColor(m_hdc, colFg);
if ( m_oldColFg == CLR_INVALID )
{
wxLogLastError(wxT("SetTextColor"));
}
}
else
{
m_oldColFg = CLR_INVALID;
}
if ( colBg != CLR_INVALID )
{
m_oldColBg = ::SetBkColor(m_hdc, colBg);
if ( m_oldColBg == CLR_INVALID )
{
wxLogLastError(wxT("SetBkColor"));
}
}
else
{
m_oldColBg = CLR_INVALID;
}
}
private:
const HDC m_hdc;
COLORREF m_oldColFg,
m_oldColBg;
wxDECLARE_NO_COPY_CLASS(wxTextColoursChanger);
};
// background mode
class wxBkModeChanger
{
public:
// set background mode to opaque if mode != wxBRUSHSTYLE_TRANSPARENT
wxBkModeChanger(HDC hdc, int mode)
: m_hdc(hdc)
{
Change(mode);
}
~wxBkModeChanger()
{
if ( m_oldMode )
::SetBkMode(m_hdc, m_oldMode);
}
protected:
// this ctor doesn't change mode immediately, call Change() later to do it
// only if needed
wxBkModeChanger(HDC hdc) : m_hdc(hdc) { m_oldMode = 0; }
void Change(int mode)
{
m_oldMode = ::SetBkMode(m_hdc, mode == wxBRUSHSTYLE_TRANSPARENT
? TRANSPARENT
: OPAQUE);
if ( !m_oldMode )
{
wxLogLastError(wxT("SetBkMode"));
}
}
private:
const HDC m_hdc;
int m_oldMode;
wxDECLARE_NO_COPY_CLASS(wxBkModeChanger);
};
} // namespace wxMSWImpl
#endif // _MSW_PRIVATE_DC_H_
|
