#------------------------------------------------------------------------------
#
#  Copyright (c) 2005, 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:   10/21/2004
#
#------------------------------------------------------------------------------

""" Defines the various image enumeration editors for the wxPython user interface toolkit.
"""

#-------------------------------------------------------------------------------
#  Imports:
#-------------------------------------------------------------------------------

import wx

from traits.api \
    import Any

# FIXME: ToolkitEditorFactory is a proxy class defined here just for backward
# compatibility. The class has been moved to the
# traitsui.editors.image_enum_editor file.
from traitsui.editors.image_enum_editor \
    import ToolkitEditorFactory

from .editor \
    import Editor

from .helper \
    import bitmap_cache, position_window, TraitsUIPanel

from .constants \
    import WindowColor

from .image_control \
    import ImageControl

#-------------------------------------------------------------------------------
#  'ReadonlyEditor' class:
#-------------------------------------------------------------------------------

class ReadonlyEditor ( Editor ):
    """ Read-only style of image enumeration editor, which displays a single
    ImageControl, representing the object trait's value.
    """
    #---------------------------------------------------------------------------
    #  Finishes initializing the editor by creating the underlying toolkit
    #  widget:
    #---------------------------------------------------------------------------

    def init ( self, parent ):
        """ Finishes initializing the editor by creating the underlying toolkit
            widget.
        """
        self.control = ImageControl( parent, bitmap_cache( '%s%s%s' %
            ( self.factory.prefix, self.str_value, self.factory.suffix ),
            False, self.factory._image_path ) )

    #---------------------------------------------------------------------------
    #  Updates the editor when the object trait changes external to the editor:
    #---------------------------------------------------------------------------

    def update_editor ( self ):
        """ Updates the editor when the object trait changes externally to the
            editor.
        """
        self.control.Bitmap( bitmap_cache( '%s%s%s' %
            ( self.factory.prefix, self.str_value, self.factory.suffix ),
            False, self.factory._image_path ) )

#-------------------------------------------------------------------------------
#  'SimpleEditor' class:
#-------------------------------------------------------------------------------

class SimpleEditor ( ReadonlyEditor ):
    """ Simple style of image enumeration editor, which displays an
    ImageControl, representing the object trait's value. Clicking an image
    displays a dialog box for selecting an image corresponding to a different
    value.
    """
    #---------------------------------------------------------------------------
    #  Finishes initializing the editor by creating the underlying toolkit
    #  widget:
    #---------------------------------------------------------------------------

    def init ( self, parent ):
        """ Finishes initializing the editor by creating the underlying toolkit
            widget.
        """
        super( SimpleEditor, self ).init( parent )
        self.control.Selected( True )
        self.control.Handler( self.popup_editor )
        self.set_tooltip()

    #---------------------------------------------------------------------------
    #  Handles the user clicking the ImageControl to display the pop-up dialog:
    #---------------------------------------------------------------------------

    def popup_editor ( self, control ):
        """ Handles the user clicking the ImageControl to display the pop-up
            dialog.
        """
        ImageEnumDialog( self )

#-------------------------------------------------------------------------------
#  'CustomEditor' class:
#-------------------------------------------------------------------------------

class CustomEditor ( Editor ):
    """ Custom style of image enumeration editor, which displays a grid of
    ImageControls. The user can click an image to select the corresponding
    value.
    """
    #---------------------------------------------------------------------------
    #  Trait definitions:
    #---------------------------------------------------------------------------

    update_handler = Any  # Callback to call when any button clicked

    #---------------------------------------------------------------------------
    #  Finishes initializing the editor by creating the underlying toolkit
    #  widget:
    #---------------------------------------------------------------------------

    def init ( self, parent ):
        """ Finishes initializing the editor by creating the underlying toolkit
            widget.
        """
        self._create_image_grid( parent )

    #---------------------------------------------------------------------------
    #  Populates a specified window with a grid of image buttons:
    #---------------------------------------------------------------------------

    def _create_image_grid ( self, parent ):
        """ Populates a specified window with a grid of image buttons.
        """
        # Create the panel to hold the ImageControl buttons:
        self.control = panel = TraitsUIPanel( parent, -1 )

        # Create the main sizer:
        if self.factory.cols > 1:
           sizer = wx.GridSizer( 0, self.factory.cols, 0, 0 )
        else:
           sizer = wx.BoxSizer( wx.VERTICAL )

        # Add the set of all possible choices:
        factory   = self.factory
        mapping   = factory._mapping
        cur_value = self.value
        for name in self.factory._names:
            value   = mapping[ name ]
            control = ImageControl( panel,
                          bitmap_cache( '%s%s%s' % ( factory.prefix, name,
                              factory.suffix ), False, factory._image_path ),
                          value == cur_value,
                          self.update_object )
            control.value = value
            sizer.Add( control, 0, wx.ALL, 2 )
            self.set_tooltip( control )

        # Finish setting up the control layout:
        panel.SetSizerAndFit( sizer )

    #---------------------------------------------------------------------------
    #  Handles the user clicking on an ImageControl to set an object value:
    #---------------------------------------------------------------------------

    def update_object ( self, control ):
        """ Handles the user clicking on an ImageControl to set an object value.
        """
        self.value = control.value
        if self.update_handler is not None:
            self.update_handler()

    #---------------------------------------------------------------------------
    #  Updates the editor when the object trait changes external to the editor:
    #---------------------------------------------------------------------------

    def update_editor ( self ):
        """ Updates the editor when the object trait changes externally to the
            editor.
        """
        value = self.value
        for control in self.control.GetChildren():
            control.Selected( value == control.value )

#-------------------------------------------------------------------------------
#  'ImageEnumDialog' class:
#-------------------------------------------------------------------------------

class ImageEnumDialog ( wx.Frame ):
    """ Dialog box for selecting an ImageControl
    """
    #---------------------------------------------------------------------------
    #  Initializes the object:
    #---------------------------------------------------------------------------

    def __init__ ( self, editor ):
        """ Initializes the object.
        """
        wx.Frame.__init__( self, editor.control, -1, '',
                           style = wx.SIMPLE_BORDER )
        self.SetBackgroundColour( WindowColor )
        wx.EVT_ACTIVATE( self, self._on_close_dialog )
        self._closed = False

        dlg_editor = CustomEditor( self,
                                   factory        = editor.factory,
                                   ui             = editor.ui,
                                   object         = editor.object,
                                   name           = editor.name,
                                   description    = editor.description,
                                   update_handler = self._close_dialog )

        dlg_editor.init( self )

        # Wrap the dialog around the image button panel:
        sizer = wx.BoxSizer( wx.VERTICAL )
        sizer.Add( dlg_editor.control )
        sizer.Fit( self )

        # Position the dialog:
        position_window( self, parent = editor.control )
        self.Show()

    #---------------------------------------------------------------------------
    #  Closes the dialog:
    #---------------------------------------------------------------------------

    def _on_close_dialog ( self, event ):
        """ Closes the dialog.
        """
        if not event.GetActive():
            self._close_dialog()

    #---------------------------------------------------------------------------
    #  Closes the dialog:
    #---------------------------------------------------------------------------

    def _close_dialog ( self ):
        """ Closes the dialog.
        """
        if not self._closed:
            self._closed = True
            self.Destroy()

### EOF #######################################################################
