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#------------------------------------------------------------------------------
# Copyright (c) 2007, Riverbank Computing Limited
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD license.
# However, when used with the GPL version of PyQt the additional terms described in the PyQt GPL exception also apply
#
# Author: Riverbank Computing Limited
#------------------------------------------------------------------------------
""" Defines the various font editors and the font editor factory, for the
PyQt user interface toolkit..
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from pyface.qt import QtCore, QtGui
from traitsui.editors.font_editor \
import ToolkitEditorFactory as BaseToolkitEditorFactory
from editor_factory \
import SimpleEditor as BaseSimpleEditor, \
TextEditor as BaseTextEditor, \
ReadonlyEditor as BaseReadonlyEditor
from editor \
import Editor
#-------------------------------------------------------------------------------
# Constants:
#-------------------------------------------------------------------------------
# Standard font point sizes
PointSizes = [
'8', '9', '10', '11', '12', '14', '16', '18',
'20', '22', '24', '26', '28', '36', '48', '72'
]
#---------------------------------------------------------------------------
# The PyQtToolkitEditorFactory class.
#---------------------------------------------------------------------------
## We need to add qt4-specific methods to the editor factory, and so we create
## a subclass of the BaseToolkitEditorFactory.
class ToolkitEditorFactory(BaseToolkitEditorFactory):
""" PyQt editor factory for font editors.
"""
#---------------------------------------------------------------------------
# Returns a QFont object corresponding to a specified object's font trait:
#---------------------------------------------------------------------------
def to_qt4_font ( self, editor ):
""" Returns a QFont object corresponding to a specified object's font
trait.
"""
return QtGui.QFont(editor.value)
#---------------------------------------------------------------------------
# Gets the application equivalent of a QFont value:
#---------------------------------------------------------------------------
def from_qt4_font ( self, font ):
""" Gets the application equivalent of a QFont value.
"""
return font
#---------------------------------------------------------------------------
# Returns the text representation of the specified object trait value:
#---------------------------------------------------------------------------
def str_font ( self, font ):
""" Returns the text representation of the specified object trait value.
"""
weight = { QtGui.QFont.Light: ' Light',
QtGui.QFont.Bold: ' Bold' }.get(font.weight(), '')
style = { QtGui.QFont.StyleOblique: ' Slant',
QtGui.QFont.StyleItalic: ' Italic' }.get(font.style(), '')
return '%s point %s%s%s' % (
font.pointSize(), font.family(), style, weight )
#-------------------------------------------------------------------------------
# 'SimpleFontEditor' class:
#-------------------------------------------------------------------------------
class SimpleFontEditor ( BaseSimpleEditor ):
""" Simple style of font editor, which displays a text field that contains
a text representation of the font value (using that font if possible).
Clicking the field displays a font selection dialog box.
"""
#---------------------------------------------------------------------------
# Invokes the pop-up editor for an object trait:
#---------------------------------------------------------------------------
def popup_editor(self):
""" Invokes the pop-up editor for an object trait.
"""
fnt, ok = QtGui.QFontDialog.getFont(self.factory.to_qt4_font(self),
self.control)
if ok:
self.value = self.factory.from_qt4_font(fnt)
self.update_editor()
#---------------------------------------------------------------------------
# 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.
"""
super( SimpleFontEditor, self ).update_editor()
set_font( self )
#---------------------------------------------------------------------------
# Returns the text representation of a specified font value:
#---------------------------------------------------------------------------
def string_value ( self, font ):
""" Returns the text representation of a specified font value.
"""
return self.factory.str_font( font )
#-------------------------------------------------------------------------------
# 'CustomFontEditor' class:
#-------------------------------------------------------------------------------
class CustomFontEditor ( Editor ):
""" Custom style of font editor, which displays the following:
* A text field containing the text representation of the font value
(using that font if possible).
* A combo box containing all available type face names.
* A combo box containing the available type sizes.
"""
#---------------------------------------------------------------------------
# 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 = QtGui.QWidget()
layout = QtGui.QVBoxLayout(self.control)
layout.setContentsMargins(0, 0, 0, 0)
# Add the standard font control:
self._font = font = QtGui.QLineEdit(self.str_value)
QtCore.QObject.connect(font, QtCore.SIGNAL('editingFinished()'),
self.update_object)
layout.addWidget(font)
# Add all of the font choice controls:
layout2 = QtGui.QHBoxLayout()
self._facename = control = QtGui.QFontComboBox()
control.setEditable(False)
QtCore.QObject.connect(control,
QtCore.SIGNAL('currentFontChanged(QFont)'),
self.update_object_parts)
layout2.addWidget(control)
self._point_size = control = QtGui.QComboBox()
control.addItems(PointSizes)
QtCore.QObject.connect(control,
QtCore.SIGNAL('currentIndexChanged(int)'),
self.update_object_parts)
layout2.addWidget(control)
# These don't have explicit controls.
self._bold = self._italic = False
layout.addLayout(layout2)
#---------------------------------------------------------------------------
# Handles the user changing the contents of the font text control:
#---------------------------------------------------------------------------
def update_object (self):
""" Handles the user changing the contents of the font text control.
"""
self.value = unicode(self._font.text())
self._set_font(self.factory.to_qt4_font(self))
self.update_editor()
#---------------------------------------------------------------------------
# Handles the user modifying one of the font components:
#---------------------------------------------------------------------------
def update_object_parts (self):
""" Handles the user modifying one of the font components.
"""
fnt = self._facename.currentFont()
fnt.setBold(self._bold)
fnt.setItalic(self._italic)
psz = int(self._point_size.currentText())
fnt.setPointSize(psz)
self.value = self.factory.from_qt4_font(fnt)
self._font.setText(self.str_value)
self._set_font(fnt)
#---------------------------------------------------------------------------
# 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.
"""
font = self.factory.to_qt4_font( self )
self._bold = font.bold()
self._italic = font.italic()
self._facename.setCurrentFont(font)
try:
idx = PointSizes.index(str(font.pointSize()))
except ValueError:
idx = PointSizes.index('9')
self._point_size.setCurrentIndex(idx)
#---------------------------------------------------------------------------
# Returns the text representation of a specified font value:
#---------------------------------------------------------------------------
def string_value ( self, font ):
""" Returns the text representation of a specified font value.
"""
return self.factory.str_font( font )
#---------------------------------------------------------------------------
# Returns the editor's control for indicating error status:
#---------------------------------------------------------------------------
def get_error_control ( self ):
""" Returns the editor's control for indicating error status.
"""
return [ self._font, self._facename, self._point_size ]
#-- Private Methods --------------------------------------------------------
def _set_font ( self, font ):
""" Sets the font used by the text control to the specified font.
"""
font.setPointSize( min( 10, font.pointSize() ) )
self._font.setFont( font )
#-------------------------------------------------------------------------------
# 'TextFontEditor' class:
#-------------------------------------------------------------------------------
class TextFontEditor ( BaseTextEditor ):
""" Text style of font editor, which displays an editable text field
containing a text representation of the font value (using that font if
possible).
"""
#---------------------------------------------------------------------------
# Handles the user changing the contents of the edit control:
#---------------------------------------------------------------------------
def update_object(self):
""" Handles the user changing the contents of the edit control.
"""
self.value = unicode(self.control.text())
#---------------------------------------------------------------------------
# Updates the editor when the object trait changes external to the editor:
#---------------------------------------------------------------------------
def update_editor ( self ):
""" Updates the editor when the object trait changes external to the
editor.
"""
super( TextFontEditor, self ).update_editor()
set_font( self )
#---------------------------------------------------------------------------
# Returns the text representation of a specified font value:
#---------------------------------------------------------------------------
def string_value ( self, font ):
""" Returns the text representation of a specified font value.
"""
return self.factory.str_font( font )
#-------------------------------------------------------------------------------
# 'ReadonlyFontEditor' class:
#-------------------------------------------------------------------------------
class ReadonlyFontEditor ( BaseReadonlyEditor ):
""" Read-only style of font editor, which displays a read-only text field
containing a text representation of the font value (using that font if
possible).
"""
#---------------------------------------------------------------------------
# Updates the editor when the object trait changes external to the editor:
#---------------------------------------------------------------------------
def update_editor ( self ):
""" Updates the editor when the object trait changes external to the
editor.
"""
super( ReadonlyFontEditor, self ).update_editor()
set_font( self )
#---------------------------------------------------------------------------
# Returns the text representation of a specified font value:
#---------------------------------------------------------------------------
def string_value ( self, font ):
""" Returns the text representation of a specified font value.
"""
return self.factory.str_font( font )
#-------------------------------------------------------------------------------
# Set the editor control's font to match a specified font:
#-------------------------------------------------------------------------------
def set_font ( editor ):
""" Sets the editor control's font to match a specified font.
"""
editor.control.setFont(editor.factory.to_qt4_font(editor))
# Define the names SimpleEditor, CustomEditor, TextEditor and ReadonlyEditor
# which are looked up by the editor factory for the font editor.
SimpleEditor = SimpleFontEditor
CustomEditor = CustomFontEditor
TextEditor = TextFontEditor
ReadonlyEditor = ReadonlyFontEditor
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