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
|
#include "stdafx.h"
#include "CircleIndicator.h"
#include <atltypes.h>
#include "AppState.h"
namespace
{
static const LPCTSTR windowClassName = L"CircleIndicator";
// Font with these symbols, shipped with Windows since forever:
// https://learn.microsoft.com/en-us/typography/font-list/segoe-ui-symbol
static const LPCTSTR fontName = L"Segoe UI Symbol";
// Outlined circle
static const LPCTSTR circleOutline = L"⚪";
// Filled circle
static const LPCTSTR circleFilled = L"⚫";
// Font size for that symbol font, in points
constexpr int fontSizePoints = 14;
// Default active color for the indicator
constexpr uint32_t defaultActiveColor = 0x7FFF7F;
}
CircleIndicator::CircleIndicator() :
activeColor( defaultActiveColor )
{ }
ATL::CWndClassInfo& CircleIndicator::GetWndClassInfo()
{
// Use custom class style with CS_PARENTDC, and COLOR_3DFACE for the background
static ATL::CWndClassInfo wc =
{
{ sizeof( WNDCLASSEX ),
CS_HREDRAW | CS_VREDRAW | CS_PARENTDC,
StartWindowProc,
0, 0, NULL, NULL, NULL, (HBRUSH)( COLOR_3DFACE + 1 ), NULL, windowClassName, NULL },
NULL, NULL, IDC_ARROW, TRUE, 0, _T( "" )
};
return wc;
}
// Class registration
HRESULT CircleIndicator::registerClass()
{
WNDPROC pUnusedWndSuperProc = nullptr;
ATOM a = GetWndClassInfo().Register( &pUnusedWndSuperProc );
if( 0 != a )
return S_OK;
return getLastHr();
}
HRESULT CircleIndicator::createFont( int height )
{
LOGFONT logFont;
memset( &logFont, 0, sizeof( logFont ) );
logFont.lfHeight = height;
logFont.lfCharSet = ANSI_CHARSET;
logFont.lfOutPrecision = OUT_TT_PRECIS;
logFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
wcsncpy_s( logFont.lfFaceName, fontName, _TRUNCATE );
font.CreateFontIndirect( &logFont );
if( font )
return S_OK;
return E_FAIL;
}
void CircleIndicator::onDestroy()
{
if( font )
font.DeleteObject();
}
void CircleIndicator::onPaint( CDCHandle dc )
{
CRect rectInt32;
GetClientRect( &rectInt32 );
CPaintDC pdc( m_hWnd );
const int logPixels = pdc.GetDeviceCaps( LOGPIXELSY );
int fontSize = -MulDiv( fontSizePoints, logPixels, 72 );
if( !font || fontHeight != fontSize )
{
if( font )
font.DeleteObject();
HRESULT hr = createFont( fontSize );
if( FAILED( hr ) )
return;
fontHeight = fontSize;
}
pdc.SetBkColor( GetSysColor( COLOR_3DFACE ) );
pdc.SelectFont( font );
pdc.SetBkMode( OPAQUE );
constexpr UINT textFormat = DT_CENTER | DT_VCENTER;
if( isActive )
{
pdc.SetTextColor( activeColor );
pdc.DrawText( circleFilled, 1, rectInt32, textFormat );
pdc.SetBkMode( TRANSPARENT );
}
pdc.SetTextColor( 0 );
pdc.DrawText( circleOutline, 1, rectInt32, textFormat );
}
void CircleIndicator::setActive( bool nowActive )
{
if( nowActive == isActive )
return;
// Repaint the control
isActive = nowActive;
InvalidateRect( nullptr );
}
|
