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
|
#!/usr/bin/env python
# Qt tutorial 10.
import sys
import qt
class LCDRange(qt.QVBox):
def __init__(self, parent=None, name=None):
qt.QVBox.__init__(self, parent, name)
lcd = qt.QLCDNumber(2, self, "lcd")
self.slider = qt.QSlider(qt.Qt.Horizontal, self, "slider")
self.slider.setRange(0, 99)
self.slider.setValue(0)
self.connect(self.slider, qt.SIGNAL("valueChanged(int)"), lcd, qt.SLOT("display(int)"))
self.connect(self.slider, qt.SIGNAL("valueChanged(int)"), self, qt.PYSIGNAL("valueChanged(int)"))
self.setFocusProxy(self.slider)
def value(self):
return self.slider.value()
def setValue(self, value):
self.slider.setValue(value)
def setRange(self, minVal, maxVal):
if minVal < 0 or maxVal > 99 or minVal > maxVal:
raise ValueError, "LCDRange.setRange(): invalid range"
self.slider.setRange(minVal, maxVal)
class CannonField(qt.QWidget):
def __init__(self, parent=None, name=None):
qt.QWidget.__init__(self, parent, name)
self.ang = 45
self.f = 0
self.setPalette(qt.QPalette(qt.QColor(250, 250, 200)))
def angle(self):
return self.ang
def setAngle(self, degrees):
if degrees < 5:
degrees = 5
if degrees > 70:
degrees = 70
if self.ang == degrees:
return
self.ang = degrees
self.repaint(self.cannonRect(), 0)
self.emit(qt.PYSIGNAL("angleChanged(int)"), (self.ang, ))
def force(self):
return self.f
def setForce(self, newton):
if newton < 0:
newton = 0
if self.f == newton:
return
self.f = newton
self.emit(qt.PYSIGNAL("forceChanged(int)"), (self.f, ))
def paintEvent(self, ev):
if not ev.rect().intersects(self.cannonRect()):
return
cr = self.cannonRect()
pix = qt.QPixmap(cr.size())
pix.fill(self, cr.topLeft())
p = qt.QPainter(pix)
p.setBrush(qt.Qt.blue)
p.setPen(qt.Qt.NoPen)
p.translate(0, pix.height() - 1)
p.drawPie(qt.QRect(-35, -35, 70, 70), 0, 90 * 16)
p.rotate(-self.ang)
p.drawRect(qt.QRect(33, -4, 15, 8))
p.end()
p.begin(self)
p.drawPixmap(cr.topLeft(), pix)
def cannonRect(self):
r = qt.QRect(0, 0, 50, 50)
r.moveBottomLeft(self.rect().bottomLeft())
return r
def sizePolicy(self):
return qt.QSizePolicy(qt.QSizePolicy.Expanding, qt.QSizePolicy.Expanding)
class MyWidget(qt.QWidget):
def __init__(self, parent=None, name=None):
qt.QWidget.__init__(self, parent, name)
quit = qt.QPushButton("&Quit", self, "quit")
quit.setFont(qt.QFont("Times", 18, qt.QFont.Bold))
self.connect(quit, qt.SIGNAL("clicked()"), qt.qApp, qt.SLOT("quit()"))
self.angle = LCDRange(self, "angle")
self.angle.setRange(5, 70)
self.force = LCDRange(self, "force")
self.force.setRange(10, 50)
self.cannonField = CannonField(self, "cannonField")
self.connect(self.angle, qt.PYSIGNAL("valueChanged(int)"), self.cannonField.setAngle)
self.connect(self.cannonField, qt.PYSIGNAL("angleChanged(int)"), self.angle.setValue)
self.connect(self.force, qt.PYSIGNAL("valueChanged(int)"), self.cannonField.setForce)
self.connect(self.cannonField, qt.PYSIGNAL("forceChanged(int)"), self.force.setValue)
grid = qt.QGridLayout(self, 2, 2, 10)
grid.addWidget(quit, 0, 0)
grid.addWidget(self.cannonField, 1, 1)
grid.setColStretch(1, 10)
leftBox = qt.QVBoxLayout()
grid.addLayout(leftBox, 1, 0)
leftBox.addWidget(self.angle)
leftBox.addWidget(self.force)
self.angle.setValue(60)
self.force.setValue(25)
self.angle.setFocus()
qt.QApplication.setColorSpec(qt.QApplication.CustomColor)
a = qt.QApplication(sys.argv)
w = MyWidget()
w.setGeometry(100, 100, 500, 355)
a.setMainWidget(w)
w.show()
sys.exit(a.exec_loop())
|
