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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
#include <windows.h>
#include "drawpie.h"
#ifdef WIN32
#define MoveTo(_hdc,_x,_y) MoveToEx(_hdc, _x, _y, NULL)
#endif // WIN32
int NEAR IntSqrt(unsigned long dwNum)
{
// We will keep shifting dwNum left and look at the top two bits.
// initialize sqrt and remainder to 0.
DWORD dwSqrt = 0, dwRemain = 0, dwTry;
int i;
// We iterate 16 times, once for each pair of bits.
for (i=0; i<16; ++i)
{
// Mask off the top two bits of dwNum and rotate them into the
// bottom of the remainder
dwRemain = (dwRemain<<2) | (dwNum>>30);
// Now we shift the sqrt left; next we'll determine whether the
// new bit is a 1 or a 0.
dwSqrt <<= 1;
// This is where we double what we already have, and try a 1 in
// the lowest bit.
dwTry = dwSqrt*2 + 1;
if (dwRemain >= dwTry)
{
// The remainder was big enough, so subtract dwTry from
// the remainder and tack a 1 onto the sqrt.
dwRemain -= dwTry;
dwSqrt |= 0x01;
}
// Shift dwNum to the left by 2 so we can work on the next few
// bits.
dwNum <<= 2;
}
return(dwSqrt);
}
VOID NEAR DrawPie(HDC hDC, LPCRECT lprcItem, UINT uPctX10, BOOL TrueZr100,
UINT uOffset, const COLORREF FAR *lpColors)
{
int cx, cy, rx, ry, x, y;
int uQPctX10;
RECT rcItem;
HRGN hEllRect, hEllipticRgn, hRectRgn;
HBRUSH hBrush, hOldBrush;
HPEN hPen, hOldPen;
rcItem = *lprcItem;
rcItem.left = lprcItem->left;
rcItem.top = lprcItem->top;
rcItem.right = lprcItem->right - rcItem.left;
rcItem.bottom = lprcItem->bottom - rcItem.top - uOffset;
rx = rcItem.right / 2;
cx = rcItem.left + rx;
ry = rcItem.bottom / 2;
cy = rcItem.top + ry;
if (rx<=10 || ry<=10)
{
return;
}
rcItem.right = rcItem.left+2*rx;
rcItem.bottom = rcItem.top+2*ry;
if (uPctX10 > 1000)
{
uPctX10 = 1000;
}
/* Translate to first quadrant of a Cartesian system
*/
uQPctX10 = (uPctX10 % 500) - 250;
if (uQPctX10 < 0)
{
uQPctX10 = -uQPctX10;
}
/* Calc x and y. I am trying to make the area be the right percentage.
** I don't know how to calculate the area of a pie slice exactly, so I
** approximate it by using the triangle area instead.
*/
if (uQPctX10 < 120)
{
x = IntSqrt(((DWORD)rx*(DWORD)rx*(DWORD)uQPctX10*(DWORD)uQPctX10)
/((DWORD)uQPctX10*(DWORD)uQPctX10+(250L-(DWORD)uQPctX10)*(250L-(DWORD)uQPctX10)));
y = IntSqrt(((DWORD)rx*(DWORD)rx-(DWORD)x*(DWORD)x)*(DWORD)ry*(DWORD)ry/((DWORD)rx*(DWORD)rx));
}
else
{
y = IntSqrt((DWORD)ry*(DWORD)ry*(250L-(DWORD)uQPctX10)*(250L-(DWORD)uQPctX10)
/((DWORD)uQPctX10*(DWORD)uQPctX10+(250L-(DWORD)uQPctX10)*(250L-(DWORD)uQPctX10)));
x = IntSqrt(((DWORD)ry*(DWORD)ry-(DWORD)y*(DWORD)y)*(DWORD)rx*(DWORD)rx/((DWORD)ry*(DWORD)ry));
}
/* Switch on the actual quadrant
*/
switch (uPctX10 / 250)
{
case 1:
y = -y;
break;
case 2:
break;
case 3:
x = -x;
break;
default: // case 0 and case 4
x = -x;
y = -y;
break;
}
/* Now adjust for the center.
*/
x += cx;
y += cy;
/* Draw the shadows using regions (to reduce flicker).
*/
hEllipticRgn = CreateEllipticRgnIndirect(&rcItem);
OffsetRgn(hEllipticRgn, 0, uOffset);
hEllRect = CreateRectRgn(rcItem.left, cy, rcItem.right, cy+uOffset);
hRectRgn = CreateRectRgn(0, 0, 0, 0);
CombineRgn(hRectRgn, hEllipticRgn, hEllRect, RGN_OR);
OffsetRgn(hEllipticRgn, 0, -(int)uOffset);
CombineRgn(hEllRect, hRectRgn, hEllipticRgn, RGN_DIFF);
/* Always draw the whole area in the free shadow/
*/
hBrush = CreateSolidBrush(lpColors[DP_FREESHADOW]);
if (hBrush)
{
FillRgn(hDC, hEllRect, hBrush);
DeleteObject(hBrush);
}
/* Draw the used shadow only if the disk is at least half used.
*/
if (uPctX10>500 && (hBrush=CreateSolidBrush(lpColors[DP_USEDSHADOW]))!=NULL)
{
DeleteObject(hRectRgn);
hRectRgn = CreateRectRgn(x, cy, rcItem.right, lprcItem->bottom);
CombineRgn(hEllipticRgn, hEllRect, hRectRgn, RGN_AND);
FillRgn(hDC, hEllipticRgn, hBrush);
DeleteObject(hBrush);
}
DeleteObject(hRectRgn);
DeleteObject(hEllipticRgn);
DeleteObject(hEllRect);
hPen = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_WINDOWFRAME));
hOldPen = SelectObject(hDC, hPen);
if((uPctX10 < 100) && (cy == y))
{
hBrush = CreateSolidBrush(lpColors[DP_FREECOLOR]);
hOldBrush = SelectObject(hDC, hBrush);
if((TrueZr100 == FALSE) || (uPctX10 != 0))
{
Pie(hDC, rcItem.left, rcItem.top, rcItem.right, rcItem.bottom,
rcItem.left, cy, x, y);
}
else
{
Ellipse(hDC, rcItem.left, rcItem.top, rcItem.right,
rcItem.bottom);
}
}
else if((uPctX10 > (1000 - 100)) && (cy == y))
{
hBrush = CreateSolidBrush(lpColors[DP_USEDCOLOR]);
hOldBrush = SelectObject(hDC, hBrush);
if((TrueZr100 == FALSE) || (uPctX10 != 1000))
{
Pie(hDC, rcItem.left, rcItem.top, rcItem.right, rcItem.bottom,
rcItem.left, cy, x, y);
}
else
{
Ellipse(hDC, rcItem.left, rcItem.top, rcItem.right,
rcItem.bottom);
}
}
else
{
hBrush = CreateSolidBrush(lpColors[DP_USEDCOLOR]);
hOldBrush = SelectObject(hDC, hBrush);
Ellipse(hDC, rcItem.left, rcItem.top, rcItem.right, rcItem.bottom);
SelectObject(hDC, hOldBrush);
DeleteObject(hBrush);
hBrush = CreateSolidBrush(lpColors[DP_FREECOLOR]);
hOldBrush = SelectObject(hDC, hBrush);
Pie(hDC, rcItem.left, rcItem.top, rcItem.right, rcItem.bottom,
rcItem.left, cy, x, y);
}
SelectObject(hDC, hOldBrush);
DeleteObject(hBrush);
/* Do not draw the lines if the %age is truely 0 or 100 (completely
** empty disk or completly full disk)
*/
if((TrueZr100 == FALSE) || ((uPctX10 != 0) && (uPctX10 != 1000)))
{
Arc(hDC, rcItem.left, rcItem.top+uOffset, rcItem.right, rcItem.bottom+uOffset,
rcItem.left, cy+uOffset, rcItem.right, cy+uOffset-1);
MoveTo(hDC, rcItem.left, cy);
LineTo(hDC, rcItem.left, cy+uOffset);
MoveTo(hDC, rcItem.right-1, cy);
LineTo(hDC, rcItem.right-1, cy+uOffset);
if (uPctX10 > 500)
{
MoveTo(hDC, x, y);
LineTo(hDC, x, y+uOffset);
}
}
SelectObject(hDC, hOldPen);
DeleteObject(hPen);
}
|
