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#-------------------------------------------------------------------------------
#
# Copyright (c) 2007, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
#
# Author: David C. Morrill
# Date: 07/09/2007
#
#-------------------------------------------------------------------------------
""" Defines a ThemedWindow base class for creating themed windows.
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
import wx
from traits.api \
import HasPrivateTraits, HasTraits, Instance, Str, Enum, Any, Bool
from traitsui.ui_traits \
import ATheme
from helper \
import init_wx_handlers, BufferDC
#-------------------------------------------------------------------------------
# 'ThemedWindow' class:
#-------------------------------------------------------------------------------
class ThemedWindow ( HasPrivateTraits ):
#-- Public Traits ----------------------------------------------------------
# The theme associated with this window:
theme = ATheme
# The default alignment to use:
default_alignment = Enum( 'left', 'center', 'right' )
# The current mouse event state:
state = Str( 'normal' )
# Optional controller used for overriding event handling:
controller = Instance( HasTraits )
# Should debugging information be overlaid on the theme?
debug = Bool( False )
#-- Public Methods ---------------------------------------------------------
def init_control ( self ):
""" Initializes the underlying wx.Window object.
"""
init_wx_handlers( self.control, self )
def in_control ( self, x, y ):
""" Returns whether a specified (x,y) coordinate is inside the control
or not.
"""
wdx, wdy = self.control.GetClientSize()
return ((0 <= x < wdx) and (0 <= y < wdy))
def refresh ( self ):
""" Refreshes the contents of the control.
"""
if self.control is not None:
self.control.Refresh()
def capture_mouse ( self ):
""" Grab control of the mouse and indicate that we are controlling it.
"""
if not self._has_capture:
self._has_capture = True
self.control.CaptureMouse()
def release_mouse ( self ):
""" Grab control of the mouse and indicate that we are controlling it.
"""
if self._has_capture:
self._has_capture = False
self.control.ReleaseMouse()
#-- Trait Event Handlers ---------------------------------------------------
def _theme_changed ( self ):
""" Handles the 'theme' trait being changed.
"""
self.refresh()
#-- wxPython Event Handlers ------------------------------------------------
def _erase_background ( self, event ):
""" Do not erase the background here (do it in the 'on_paint' handler).
"""
pass
def _paint ( self, event ):
""" Paint the background using the associated ImageSlice object.
"""
dc = BufferDC( self.control )
self._paint_bg( dc )
self._paint_fg( dc )
dc.copy()
def _paint_bg ( self, dc ):
""" Paints the background into the supplied device context using the
associated ImageSlice object and returns the image slice used (if
any).
"""
from image_slice import paint_parent
# Repaint the parent's theme (if necessary):
paint_parent( dc, self.control )
# Draw the background theme (if any):
if self.theme is not None:
slice = self.theme.image_slice
if slice is not None:
wdx, wdy = self.control.GetClientSize()
slice.fill( dc, 0, 0, wdx, wdy, True )
if self.debug:
dc.SetPen( wx.Pen( wx.RED ) )
dc.SetBrush( wx.TRANSPARENT_BRUSH )
theme = self.theme
border = theme.border
dc.DrawRectangle( border.left, border.top,
wdx - border.right - border.left,
wdy - border.bottom - border.top )
dc.DrawRectangle( border.left + 3, border.top + 3,
wdx - border.right - border.left - 6,
wdy - border.bottom - border.top - 6 )
content = theme.content
x = slice.xleft + content.left
y = slice.xtop + content.top
dc.DrawRectangle( x - 1, y - 1,
wdx - slice.xright - content.right - x + 2,
wdy - slice.xbottom - content.bottom - y + 2 )
label = theme.label
if slice.xtop >= slice.xbottom:
y, dy = 0, slice.xtop
else:
y, dy = wdy - slice.xbottom, slice.xbottom
if dy >= 13:
x = slice.xleft + label.left
y += label.top
dc.DrawRectangle( x - 1, y - 1,
wdx - slice.xright - label.right - x + 2,
dy - label.bottom - label.top + 2 )
def _paint_fg ( self, dc ):
""" Paints the foreground of the window into the supplied device
context.
"""
pass
def _size ( self, event ):
""" Handles the control being resized.
"""
control = self.control
if control is not None:
control.Layout()
control.Refresh()
def _left_down ( self, event ):
""" Handles a left mouse button down event.
"""
self.control.SetFocus()
self.capture_mouse()
self._mouse_event( 'left_down', event )
def _left_up ( self, event ):
""" Handles a left mouse button up event.
"""
if self._has_capture:
self._has_capture = False
self.control.ReleaseMouse()
self._mouse_event( 'left_up', event )
def _left_dclick ( self, event ):
""" Handles a left mouse button double click event.
"""
self.capture_mouse()
self._mouse_event( 'left_dclick', event )
def _middle_down ( self, event ):
""" Handles a middle mouse button down event.
"""
self.capture_mouse()
self._mouse_event( 'middle_down', event )
def _middle_up ( self, event ):
""" Handles a middle mouse button up event.
"""
self.release_mouse()
self._mouse_event( 'middle_up', event )
def _middle_dclick ( self, event ):
""" Handles a middle mouse button double click event.
"""
self.capture_mouse()
self._mouse_event( 'middle_dclick', event )
def _right_down ( self, event ):
""" Handles a right mouse button down event.
"""
self.capture_mouse()
self._mouse_event( 'right_down', event )
def _right_up ( self, event ):
""" Handles a right mouse button up event.
"""
self.release_mouse()
self._mouse_event( 'right_up', event )
def _right_dclick ( self, event ):
""" Handles a right mouse button double click event.
"""
self.capture_mouse()
self._mouse_event( 'right_dclick', event )
def _motion ( self, event ):
""" Handles a mouse move event.
"""
self._mouse_event( 'motion', event )
def _enter ( self, event ):
""" Handles the mouse entering the window event.
"""
self._mouse_event( 'enter', event )
def _leave ( self, event ):
""" Handles the mouse leaving the window event.
"""
self._mouse_event( 'leave', event )
def _wheel ( self, event ):
""" Handles a mouse wheel event.
"""
self._mouse_event( 'wheel', event )
#-- Private Methods --------------------------------------------------------
def _mouse_event ( self, name, event ):
""" Routes a mouse event to the proper handler (if any).
"""
method_name = '%s_%s' % ( self.state, name )
method = None
if self.controller is not None:
method = getattr( self.controller, method_name, None )
if method is None:
method = getattr( self, method_name, None )
if method is not None:
method( event.GetX(), event.GetY(), event )
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