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
|
#!/usr/bin/env python
#****************************************************************************
#** $Id$
#**
#** Copyright (C) 1992-1998 Troll Tech AS. All rights reserved.
#**
#** This file is part of an example program for PyQt. This example
#** program may be used, distributed and modified without limitation.
#**
#*****************************************************************************/
import sys
from qt import *
TRUE = 1
FALSE = 0
zoomfactors = ["100%","200%","300%","400%","500%","600%","700%","800%","1600%"]
refreshrates = [
"No autorefresh", "50 per second", "4 per second", "3 per second",
"2 per second", "Every second", "Every two seconds", "Every three seconds",
"Every five seconds", "Every ten seconds"]
timer = (0, 20, 250, 333, 500, 1000, 2000, 3000, 5000, 10000)
class MagWidget(QWidget):
def __init__(self, qApp, parent = None, name = None):
self.qApp = qApp
QWidget.__init__(self, parent, name)
self.pm = QPixmap() # pixmap magnified
self.p = QPixmap() # pixmap
self.image = QImage() # image of pixmap (for RGB)
self.z = 0 # zoom factor
self.r = 0 # autorefresh rate (index into refreshrates)
self.grabbing = FALSE # TRUE if currently grabbing
self.grabx = -1
self.graby = -1
self.zoom = QComboBox(FALSE, self)
self.zoom.insertStrList(zoomfactors, len(zoomfactors))
self.connect(self.zoom, SIGNAL("activated(int)"),
self.setZoom)
self.refresh = QComboBox(FALSE, self)
self.refresh.insertStrList(refreshrates, len(refreshrates))
self.connect(self.refresh, SIGNAL("activated(int)"),
self.setRefresh)
x = 0
w = 0
h = 20
for s in zoomfactors:
cw = self.zoom.fontMetrics().width(s)
w = max(cw, w)
self.zoom.setGeometry(x, 2, w + 30, h)
x = w + 34
w = 0
for s in refreshrates:
cw = self.refresh.fontMetrics().width(s)
w = max(cw, w)
self.refresh.setGeometry(x, 2, w + 30, h)
self.saveButton = QPushButton(self)
self.connect(self.saveButton, SIGNAL("clicked()"), self.save)
self.saveButton.setText("Save")
self.saveButton.setGeometry(x + w + 30 + 2, 2,
10 + self.saveButton.fontMetrics().width("Save"), h)
self.quitButton = QPushButton(self)
self.connect(self.quitButton, SIGNAL("clicked()"), self.qApp, SLOT("quit()"))
self.quitButton.setText("Quit")
self.quitButton.setGeometry(self.saveButton.geometry().right() + 2, 2,
10 + self.quitButton.fontMetrics().width("Quit"), h)
self.rgb = QLabel(self)
self.rgb.setText("")
self.rgb.setAlignment(Qt.AlignVCenter)
self.rgb.resize(self.width(), self.rgb.fontMetrics().height() + 4)
self.yoffset = self.zoom.height() + 4 + self.rgb.height()
self.setMinimumSize(self.quitButton.geometry().topRight().x() + 2,
self.yoffset + 20)
w = self.quitButton.geometry().topRight().x() + 2
self.resize(w, w)
self.setMouseTracking(TRUE)
self.grabx = self.qApp.desktop().width() / 2
self.graby = self.qApp.desktop().height() / 2
self.grabAround(QPoint(self.grabx, self.graby))
#self.zoom.setCurrentItem(1) # grabAround sets zoom factor
#self.setZoom(1)
self.refresh.setCurrentItem(5)
self.setRefresh(5)
def setZoom(self, index):
if index == 8:
self.z = 16
else:
self.z = index + 1
self.grab()
def setRefresh(self, index):
self.r = index
self.killTimers()
if index and not self.grabbing:
#print "st:", timer[index]
self.startTimer(timer[index])
def save(self):
if not self.p.isNull():
self.killTimers()
fn = QFileDialog.getSaveFileName()
if not fn.isEmpty():
self.p.save(fn, "BMP")
if self.r:
self.startTimer(timer[self.r])
def grab(self):
if not self.isVisible() or self.grabx < 0 or self.graby < 0:
return
w = (self.width() + self.z - 1) / self.z
h = (self.height() + self.z - 1 - self.yoffset) / self.z
if w < 1 or h < 1:
return
x = self.grabx - w / 2
y = self.graby - h / 2
if x + w > QApplication.desktop().width():
x = QApplication.desktop().width() - w
elif x < 0:
x = 0
if y + h > QApplication.desktop().height():
y = QApplication.desktop().height() - h
elif y < 0:
y = 0
self.p = QPixmap.grabWindow(QApplication.desktop().winId(), x, y, w, h)
self.image = self.p.convertToImage()
m = QWMatrix()
#print "z:", self.z
m.scale(float(self.z), float(self.z))
self.pm = self.p.xForm(m)
self.repaint(FALSE)
def paintEvent(self, e):
if not self.pm.isNull():
paint = QPainter(self)
paint.drawPixmap(0, self.zoom.height() + 4, self.pm,
0, 0, self.width(), self.height() - self.yoffset)
def mousePressEvent(self, e):
if not self.grabbing:
self.grabbing = TRUE
self.killTimers()
self.grabMouse(Qt.crossCursor)
self.grabx = -1
self.graby = -1
else:
self.grabx = self.mapToGlobal(e.pos()).x()
self.graby = self.mapToGlobal(e.pos()).y()
def mouseReleaseEvent(self, e):
if self.grabbing and self.grabx >= 0 and self.graby >= 0:
self.grabbing = FALSE
self.grabAround(e.pos())
self.releaseMouse()
def grabAround(self, pos):
rx = self.mapToGlobal(pos).x()
ry = self.mapToGlobal(pos).y()
w = abs(rx - self.grabx)
h = abs(ry - self.graby)
if w > 10 and h > 10:
pz = 1
while w*pz*h*pz < self.width()*(self.height()-self.yoffset) and \
w*pz < QApplication.desktop().width() and \
h*pz < QApplication.desktop().height():
pz += 1
if (w*pz*h*pz - self.width()*(self.height()-self.yoffset)) > \
(self.width()*(self.height()-self.yoffset) - w*(pz-1)*h*(pz-1)):
pz -= 1
if pz < 1:
pz = 1
elif pz > 8:
pz = 8
self.zoom.setCurrentItem(pz-1)
self.z = pz
self.grabx = min(rx, self.grabx) + w / 2
self.graby = min(ry, self.graby) + h / 2
#self.resize(w*self.z, h*self.z*self.yoffset)
self.grab()
def mouseMoveEvent(self, e):
if self.grabbing or self.pm.isNull() or \
e.pos().y() > self.height() - self.zoom.fontMetrics().height() - 4 or \
e.pos().y() < self.zoom.height() + 4:
self.rgb.setText("")
else:
x = e.pos().x() / self.z
y = (e.pos().y() - self.zoom.height() - 4) / self.z
pixelinfo = ""
if self.image.valid(x, y):
px = self.image.pixel(x, y)
pixelinfo = "%3d,%3d,%3d #%02x%02x%02x" % (
qRed(px), qGreen(px), qBlue(px),
qRed(px), qGreen(px), qBlue(px))
self.rgb.setText("x=%d, y=%d %s" % \
(x + self.grabx, y + self.graby, pixelinfo))
def focusOutEvent(self, e):
self.rgb.setText("")
def timerEvent(self, e):
self.grab()
def resizeEvent(self, e):
self.rgb.setGeometry(0, self.height() - self.rgb.height(),
self.width(), self.rgb.height())
if __name__=='__main__':
app = QApplication( sys.argv )
m = MagWidget(app)
app.setMainWidget(m)
m.show()
app.exec_loop()
|
