[Pythonocc-users] class qtViewer3d() - Zoom Window & Select Area using Mouse + SHIFT

[Goran Lukic]

Hello Community,

I try to implement Zoom Window and Select Area using Mouse+SHIFT but this code 
from 
class qtviewer3d doesn't work for me.

So, I changed the following code:
# Draw rect
def DrawBox( self , event):
        tolerance = 2
        pt = point( event.pos() )
        dx = pt.x - self.dragStartPos.x
        dy = pt.y - self.dragStartPos.y
        if abs( dx ) <= tolerance and abs( dy ) <= tolerance:
            return 
        
        painter = QtGui.QPainter()
        painter.begin(self)
        painter.setPen(QtGui.QPen(QtGui.QColor(255,255,255), 1,
                                  QtCore.Qt.DotLine, QtCore.Qt.RoundCap, 
QtCore.Qt.RoundJoin))
        rect = QtCore.QRect(self.dragStartPos.x, self.dragStartPos.y, dx, dy )
        self._drawbox = [self.dragStartPos.x, self.dragStartPos.y , dx, dy]
        painter.drawRect( rect )
        self.repaint()
        painter.end()

# and mouse release event
def mouseReleaseEvent( self, event ):
        self.setCursor( self.crossNormalBitmapCursor )
        pt = point(event.pos())
        #print 'mouse release event'
        if event.button() == QtCore.Qt.LeftButton:
            pt = point(event.pos())
            self.repaint()
            if self._select_area:
                [Xmin, Ymin, dx, dy] = self._drawbox
                selected_shapes = 
self._display.Select(Xmin,Ymin,Xmin+dx,Ymin+dy)
                self._select_area = False
                
            elif self._display.Select(pt.x,pt.y):
                    selected_shape = self._display.GetSelectedShape()
                    print selected_shape,selected_shape.ShapeType()
                    
        # This part comes here !!!    
        elif event.button() == QtCore.Qt.RightButton:
            if self._zoom_area:
                [Xmin, Ymin, dx, dy] = self._drawbox
                self._display.ZoomArea(Xmin, Ymin, Xmin+dx, Ymin+dy)
                self._zoom_area = False

# and I set following Attribute 
#self.setAttribute(QtCore.Qt.WA_PaintOutsidePaintEvent) 
class qtViewer3d( qtBaseViewer ):
    def __init__( self, *kargs ):
        qtBaseViewer.__init__( self, *kargs )
        self._drawbox = False
        self._zoom_area = False
        self._select_area = False
        self._inited = False
        self._leftisdown = False
        self._middleisdown = False
        self._rightisdown = False
        self._selection = None
        self._drawtext = True
        # Very Important
        self.setAttribute(QtCore.Qt.WA_PaintOutsidePaintEvent)


So, for now it works Zoom Window if I use RMB+SHIFT, 
but Select Area (LMB+SHIFT) still not working.

hier is output from console:
Traceback (most recent call last):
  File "", line 656, in mouseReleaseEvent
    selected_shapes = self._display.Select(Xmin,Ymin,Xmin+dx,Ymin+dy)
TypeError: Select() takes exactly 3 arguments (5 given)
Traceback (most recent call last):
  File " ", line 655, in mouseReleaseEvent
    [Xmin, Ymin, dx, dy] = self._drawbox
TypeError: 'bool' object is not iterable

I do not know how to fix this error.

I am using Debian GNU/Linux "squeeze".

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