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#-------------------------------------------------------------------------------
#
# Define standard Enable 'image' based control components.
#
# Written by: David C. Morrill
#
# Date: 10/10/2003
#
# (c) Copyright 2003 by Enthought, Inc.
#
# Classes defined: Image
# Inspector
#
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from enthought.traits.api import Trait, TraitPrefixList
from enthought.traits.ui.api import Group, View
from enthought.enable.base import IDroppedOnHandler, gc_image_for
from enthought.enable.component import Component
from enthought.enable.enable_traits import string_image_trait, NoStretch
from enthought.enable.colors import ColorTrait
#-------------------------------------------------------------------------------
# 'Image' class:
#-------------------------------------------------------------------------------
class Image ( Component ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
image = Trait( '=image', string_image_trait )
stretch_width = NoStretch
stretch_height = NoStretch
#---------------------------------------------------------------------------
# Trait view definitions:
#---------------------------------------------------------------------------
traits_view = View( Group( '<component>', 'image', id = 'component' ),
Group( '<links>', id = 'links' ) )
#---------------------------------------------------------------------------
# Initialize the object:
#---------------------------------------------------------------------------
def __init__ ( self, **traits ):
Component.__init__( self, **traits )
self._image_changed( self.image )
#---------------------------------------------------------------------------
# Return an image specified by name:
#---------------------------------------------------------------------------
def image_for ( self, image ):
path = ''
prefix = image[:1]
if prefix == '=':
path = self
image = image[1:]
elif prefix == '.':
path = None
image = image[1:]
return gc_image_for( image, path )
#---------------------------------------------------------------------------
# Draw the component in a specified graphics context:
#---------------------------------------------------------------------------
def _draw ( self, gc ):
gc.draw_image( self._image, self.bounds )
#---------------------------------------------------------------------------
# Handle the image being changed:
#---------------------------------------------------------------------------
def _image_changed ( self, image ):
self._image = image = self.image_for( image )
self.width = image.width()
self.height = image.height()
#---------------------------------------------------------------------------
# Return the components that contain a specified (x,y) point:
#---------------------------------------------------------------------------
def _components_at ( self, x, y ):
bmp = self._image.bmp_array
if ((bmp.shape[2] < 4) or
(bmp[ int( self.y + self.height - y ) - 1,
int( x - self.x ), 3 ] >= 128)):
return [ self ]
return []
#-------------------------------------------------------------------------------
# 'DraggableImage' class:
#-------------------------------------------------------------------------------
class DraggableImage ( Image ):
#---------------------------------------------------------------------------
# Allow a copy of the image to be dragged:
#---------------------------------------------------------------------------
def _left_down_changed ( self, event ):
event.handled = True
self.window.drag( self, None, event, True, alpha = -1.0 )
#-------------------------------------------------------------------------------
# 'Inspector' class:
#-------------------------------------------------------------------------------
class Inspector ( DraggableImage, IDroppedOnHandler ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
image = Trait( '=inspector', string_image_trait )
#---------------------------------------------------------------------------
# Handle being dropped on a component:
#---------------------------------------------------------------------------
def was_dropped_on ( self, component, event ):
event.handled = True
component.edit_traits( kind = 'live' )
#-------------------------------------------------------------------------------
# 'ColorChip' class:
#-------------------------------------------------------------------------------
class ColorChip ( Component ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
color = ColorTrait("yellow")
item = Trait( 'fg_color', TraitPrefixList(
[ 'fg_color', 'bg_color',
'shadow_color', 'alt_color' ] ) )
#---------------------------------------------------------------------------
# Trait view definitions:
#---------------------------------------------------------------------------
traits_view = View( Group( '<component>', id = 'component' ),
Group( '<links>', id = 'links' ),
Group( 'color',
id = 'color',
style = 'custom' ) )
#---------------------------------------------------------------------------
# Initialize the object:
#---------------------------------------------------------------------------
def __init__ ( self, **traits ):
Component.__init__( self, **traits )
self._item = self.item
self._image = image = self.image_for( '=colorchip' )
self.min_width = image.width()
self.min_height = image.height()
self.dimensions( self.min_width, self.min_height )
#---------------------------------------------------------------------------
# Draw the component in a specified graphics context:
#---------------------------------------------------------------------------
def _draw ( self, gc ):
gc.save_state()
x, y, dx, dy = self.bounds
gc.set_fill_color( self.color_ )
gc.begin_path()
gc.rect( x + 1, y + 1, dx - 2, dy - 2 )
gc.fill_path()
gc.draw_image( self._image, self.bounds )
gc.restore_state()
#---------------------------------------------------------------------------
# Mouse event handlers:
#---------------------------------------------------------------------------
def _left_down_changed ( self, event ):
self.item = self._item
if event.shift_down:
if event.control_down:
self.item = 'shadow_color'
else:
self.item = 'fg_color'
elif event.control_down:
self.item = 'bg_color'
elif event.alt_down:
self.item = 'alt_color'
self.window.drag( self, None, event, True )
event.handled = True
def _right_up_changed ( self, event ):
event.handled = True
self.edit_traits( view = View( 'color@' ), kind = 'live' )
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