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75 lines
2.0 KiB
75 lines
2.0 KiB
#!/usr/bin/env python
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import sys, random
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from qt import *
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TRUE = 1
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FALSE = 0
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MAXPOINTS = 2000; # maximum number of points
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MAXCOLORS = 40;
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#
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# ConnectWidget - draws connected lines
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#
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class ConnectWidget(TQWidget):
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def __init__(self):
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TQWidget.__init__(self)
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self.setEraseColor( TQt.white ) # white background
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self.count = 0;
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self.down = FALSE
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self.points = []
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self.colors = []
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for i in range(MAXPOINTS): # init arrays
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self.points.append(TQPoint())
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for i in range(MAXCOLORS):
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self.colors.append(TQColor( random.randint(0,255), random.randint(0,255), random.randint(0,255) ))
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#
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# Handles paint events for the connect widget.
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#
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def paintEvent(self, pe):
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paint = TQPainter( self )
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for i in range(self.count-1): # connect all points
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for j in range(i+1, self.count):
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paint.setPen( self.colors[random.randint(0,MAXCOLORS-1)] ) # set random pen color
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paint.drawLine( self.points[i], self.points[j] ) # draw line
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#
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# Handles mouse press events for the connect widget.
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#
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def mousePressEvent(self, me):
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self.down = TRUE
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self.count = 0 # start recording points
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self.erase() # erase widget contents
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#
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# Handles mouse release events for the connect widget.
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#
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def mouseReleaseEvent(self, me ):
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self.down = FALSE # done recording points
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self.update() # draw the lines
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#
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# Handles mouse move events for the connect widget.
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#
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def mouseMoveEvent(self, me):
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if self.down and self.count < MAXPOINTS:
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paint = TQPainter( self )
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self.points[self.count] = TQPoint(me.pos()) # add point
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paint.drawPoint( me.pos() ) # plot point
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self.count = self.count+1
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#
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# Create and display a ConnectWidget.
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#
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a = TQApplication( sys.argv )
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connect = ConnectWidget()
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connect.setCaption( "PyTQt Example - Draw lines")
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a.setMainWidget( connect )
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connect.show()
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a.exec_loop()
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