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#!/usr/bin/env python
"""**************************************************************************
** $Id$
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
***************************************************************************"""
import sys
from qt import *
from random import random
class DynamicTip( QToolTip ):
def __init__( self, parent ):
QToolTip.__init__( self, parent )
def maybeTip( self, pos ):
#if not self.parent.inherits( "TellMe" ):
if QToolTip(self).parentWidget().inherits( "TellMe" ) :
return
r = QRect( QToolTip(self).parentWidget().tip(pos) )
if not r.isValid():
return
s = QString( "position: %d,%d" % (r.center().x(), r.center().y()) )
QToolTip(self).tip( r, s )
class TellMe( QWidget ):
def __init__( self, parent=None, name=None ):
QWidget.__init__( self, parent, name )
self.setMinimumSize( 30, 30 )
self.r1 = self.randomRect()
self.r2 = self.randomRect()
self.r3 = self.randomRect()
self.t = DynamicTip( self )
QToolTip.add( self, self.r3, "this color is called red" ) # <- helpful
def paintEvent( self, e ):
p = QPainter( self )
# I try to be efficient here, and repaint only what's needed
if e.rect().intersects( self.r1 ):
p.setBrush( Qt.blue )
p.drawRect( self.r1 )
if e.rect().intersects( self.r2 ):
p.setBrush( Qt.blue )
p.drawRect( self.r2 )
if e.rect().intersects( self.r3 ):
p.setBrush( Qt.red )
p.drawRect( self.r3 )
def mousePressEvent( self, e ):
if self.r1.contains( e.pos() ):
self.r1 = self.randomRect()
if self.r2.contains( e.pos() ):
self.r2 = self.randomRect()
self.repaint()
def resizeEvent( self, e ):
if not self.rect().contains( self.r1 ):
self.r1 = self.randomRect()
if not self.rect().contains( self.r2 ):
self.r2 = self.randomRect()
def randomRect( self ):
return QRect( random() * (self.width() - 20), random() * (self.height() - 20), 20, 20 )
def tip( self, p ):
if self.r1.contains( p ):
return self.r1
elif self.r2.contains( p ):
return self.r2
else:
return QRect( 0,0, -1,-1 )
def __del__( self ):
del self.t
self.t = None
def main( args ):
a = QApplication( args )
mw = TellMe()
mw.setCaption( "Qt Example - Dynamic Tool Tips" )
a.setMainWidget( mw )
mw.show()
a.exec_loop()
if __name__=="__main__":
main(sys.argv)
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