95 lines
2.4 KiB
Python
95 lines
2.4 KiB
Python
from ..Qt import QtGui, QtCore
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__all__ = ['JoystickButton']
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class JoystickButton(QtGui.QPushButton):
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sigStateChanged = QtCore.Signal(object, object) ## self, state
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def __init__(self, parent=None):
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QtGui.QPushButton.__init__(self, parent)
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self.radius = 200
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self.setCheckable(True)
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self.state = None
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self.setState(0,0)
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self.setFixedWidth(50)
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self.setFixedHeight(50)
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def mousePressEvent(self, ev):
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self.setChecked(True)
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self.pressPos = ev.localPos()
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ev.accept()
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def mouseMoveEvent(self, ev):
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dif = ev.localPos()-self.pressPos
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self.setState(dif.x(), -dif.y())
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def mouseReleaseEvent(self, ev):
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self.setChecked(False)
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self.setState(0,0)
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def wheelEvent(self, ev):
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ev.accept()
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def doubleClickEvent(self, ev):
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ev.accept()
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def getState(self):
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return self.state
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def setState(self, *xy):
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xy = list(xy)
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d = (xy[0]**2 + xy[1]**2)**0.5
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nxy = [0,0]
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for i in [0,1]:
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if xy[i] == 0:
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nxy[i] = 0
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else:
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nxy[i] = xy[i]/d
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if d > self.radius:
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d = self.radius
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d = (d/self.radius)**2
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xy = [nxy[0]*d, nxy[1]*d]
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w2 = self.width()/2.
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h2 = self.height()/2
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self.spotPos = QtCore.QPoint(w2*(1+xy[0]), h2*(1-xy[1]))
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self.update()
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if self.state == xy:
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return
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self.state = xy
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self.sigStateChanged.emit(self, self.state)
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def paintEvent(self, ev):
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super().paintEvent(ev)
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p = QtGui.QPainter(self)
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p.setBrush(QtGui.QBrush(QtGui.QColor(0,0,0)))
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p.drawEllipse(self.spotPos.x()-3,self.spotPos.y()-3,6,6)
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def resizeEvent(self, ev):
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self.setState(*self.state)
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super().resizeEvent(ev)
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if __name__ == '__main__':
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app = QtGui.QApplication([])
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w = QtGui.QMainWindow()
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b = JoystickButton()
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w.setCentralWidget(b)
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w.show()
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w.resize(100, 100)
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def fn(b, s):
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print("state changed:", s)
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b.sigStateChanged.connect(fn)
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## Start Qt event loop unless running in interactive mode.
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import sys
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if sys.flags.interactive != 1:
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app.exec_()
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