def _screen_graphics_paint ( self, event ):
""" Handles an overlap screen graphics widget getting a paint event.
"""
sg = self._sg_control
if sg is not None:
painter = painter_for( sg.control )
painter.drawPixmap( 0, 0, sg._pixmap )
def _get_temp_graphics ( self ):
global TempGraphics
if TempGraphics is None:
pixmap = QPixmap( 1, 1 )
TempGraphics = QtGraphics(
painter_for( pixmap ), _temp_graphics = True, _pixmap = pixmap
)
return TempGraphics
def _get_screen_graphics ( self ):
from facets.ui.toolkit import toolkit
if self._screen_graphics is None:
control = self.control
pixmap = QPixmap.grabWindow( control.winId() )
self._sg_control = sg = toolkit().create_control( self )
sg._pixmap = pixmap
dx, dy = self.size
sg.bounds = ( 0, 0, dx, dy )
sg.set_event_handler( paint = self._screen_graphics_paint )
painter = painter_for( pixmap )
painter._control = sg.control
self._screen_graphics = (
QtGraphics( painter, bitmap = pixmap ), 0, 0
)
return self._screen_graphics
def drag ( self, data, type = None, request = 'copy', image = None ):
""" Initiates a drag operation with the specified *data*. If *type* is
**None**, the control will try to determine the kind of data being
dragged from the data itself. Other than **None**, the legal values
for *type* are: 'color', 'image', 'text', 'html', 'files', 'urls'
and 'object'.
*Request* specifies whether the data is to be copied ('copy'),
moved ('move') or linked ('link'), with the default request being to
copy the data.
*Image* specifies an ImageResource image to be used while dragging
to provide the user with some indication of what is being dragged.
This may not be supported with all UI back-ends. If not supported,
the *image* value is treated as *None*. A value of *None* indicates
that the default drag image should be used.
The result is a string indicating the action taken by the receiver
(if any) of the data at the completion of the drag and drop
operation. The possible values are: 'copy', 'move', 'link' and
'ignore'.
"""
if type is None:
if isinstance( data, basestring ):
type = 'text'
elif isinstance( data, QColor ):
type = 'color'
elif isinstance( data, AnImageResource ):
type = 'image'
data = data.image
elif isinstance( data, SequenceTypes ):
type = 'urls'
data = [ QUrl( item ) for item in data ]
else:
type = 'object'
mime_data = getattr( self, '_drag_%s' % type,
self._drag_object )( data )
drag = QDrag( self.control )
drag.setMimeData( mime_data )
# Set up the drag image (if one was specified):
if isinstance( image, AnImageResource ):
bitmap = image.bitmap
idx, idy = image.width, image.height
ratio = max( idx, idy ) / 128.0
if ratio > 1.0:
# Create a scaled version of the image if it is larger than the
# maximum nominal size:
sdx = int( round( idx / ratio ) )
sdy = int( round( idy / ratio ) )
pm = QPixmap( sdx, sdy )
pm.fill( QColor( 0, 0, 0, 0 ) )
painter = painter_for( pm )
painter.drawPixmap( 0, 0, sdx, sdy, bitmap, 0, 0, idx, idy )
painter.end()
bitmap, idx, idy = pm, sdx, sdy
drag.setPixmap( bitmap )
drag.setHotSpot( QPoint( idx / 2, idy / 2 ) )
return RequestAction[ drag.exec_() ]
def _get_temp_graphics ( self ):
return QtGraphics( painter_for( QPixmap( 1, 1 ) ),
_temp_graphics = True )
def _get_graphics ( self ):
return QtGraphics( painter_for( self.control ) )
