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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 color editors for the PyQt user interface toolkit.
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from pyface.qt import QtCore, QtGui
from traitsui.editors.color_editor \
import ToolkitEditorFactory as BaseToolkitEditorFactory
from editor_factory \
import SimpleEditor as BaseSimpleEditor, \
TextEditor as BaseTextEditor, \
ReadonlyEditor as BaseReadonlyEditor
from editor \
import Editor
#-------------------------------------------------------------------------------
# Constants:
#-------------------------------------------------------------------------------
# Standard color samples:
color_samples = []
#---------------------------------------------------------------------------
# The PyQt ToolkitEditorFactory class.
#---------------------------------------------------------------------------
## We need to add qt4-specific methods to the editor factory (since all editors
## will be accessing these functions. Making these functions global functions
## in this file does not work quite well, since we want custom editors to
## override these methods easily.
class ToolkitEditorFactory(BaseToolkitEditorFactory):
""" PyQt editor factory for color editors.
"""
#---------------------------------------------------------------------------
# Gets the PyQt color equivalent of the object trait:
#---------------------------------------------------------------------------
def to_qt4_color ( self, editor ):
""" Gets the PyQt color equivalent of the object trait.
"""
if self.mapped:
return getattr( editor.object, editor.name + '_' )
return getattr( editor.object, editor.name )
#---------------------------------------------------------------------------
# Gets the application equivalent of a PyQt value:
#---------------------------------------------------------------------------
def from_qt4_color ( self, color ):
""" Gets the application equivalent of a PyQt value.
"""
return color
#---------------------------------------------------------------------------
# Returns the text representation of a specified color value:
#---------------------------------------------------------------------------
def str_color ( self, color ):
""" Returns the text representation of a specified color value.
"""
if isinstance(color, QtGui.QColor):
alpha = color.alpha()
if alpha == 255:
return "(%d,%d,%d)" % (color.red(), color.green(), color.blue())
return "(%d,%d,%d,%d)" % (color.red(), color.green(), color.blue(), alpha)
return color
#-------------------------------------------------------------------------------
# 'SimpleColorEditor' class:
#-------------------------------------------------------------------------------
class SimpleColorEditor ( BaseSimpleEditor ):
""" Simple style of color editor, which displays a text field whose
background color is the color value. Selecting the text field displays
a dialog box for selecting a new color value.
"""
#---------------------------------------------------------------------------
# Invokes the pop-up editor for an object trait:
#---------------------------------------------------------------------------
def popup_editor(self):
""" Invokes the pop-up editor for an object trait.
"""
color = self.factory.to_qt4_color(self)
color = QtGui.QColorDialog.getColor(color, self.control)
if color.isValid():
self.value = self.factory.from_qt4_color(color)
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( SimpleColorEditor, self ).update_editor()
set_color( self )
#---------------------------------------------------------------------------
# Returns the text representation of a specified color value:
#---------------------------------------------------------------------------
def string_value ( self, color ):
""" Returns the text representation of a specified color value.
"""
return self.factory.str_color( color )
#-------------------------------------------------------------------------------
# 'CustomColorEditor' class:
#-------------------------------------------------------------------------------
class CustomColorEditor ( Editor ):
""" Custom style of color editor, which displays a color editor panel.
"""
#---------------------------------------------------------------------------
# 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, self._simple_field = color_editor_for(self, parent)
#---------------------------------------------------------------------------
# Disposes of the contents of an editor:
#---------------------------------------------------------------------------
def dispose ( self ):
""" Disposes of the contents of an editor.
"""
if getattr(self, '_simple_field', None) is not None:
self._simple_field.dispose()
self._simple_field = None
super(CustomColorEditor, self).dispose()
#---------------------------------------------------------------------------
# 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.
"""
pass
#---------------------------------------------------------------------------
# Updates the object trait when a color swatch is clicked:
#---------------------------------------------------------------------------
def update_object_from_swatch(self, color_text):
""" Updates the object trait when a color swatch is clicked.
"""
color = QtGui.QColor(*[int(part) for part in color_text.split(',')])
self.value = self.factory.from_qt4_color(color)
self.update_editor()
#---------------------------------------------------------------------------
# Returns the text representation of a specified color value:
#---------------------------------------------------------------------------
def string_value ( self, color ):
""" Returns the text representation of a specified color value.
"""
return self.factory.str_color( color )
#-------------------------------------------------------------------------------
# 'TextColorEditor' class:
#-------------------------------------------------------------------------------
class TextColorEditor ( BaseTextEditor ):
""" Text style of color editor, which displays a text field whose
background color is the color value.
"""
#---------------------------------------------------------------------------
# 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())
set_color( self )
#---------------------------------------------------------------------------
# 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( TextColorEditor, self ).update_editor()
set_color( self )
#---------------------------------------------------------------------------
# Returns the text representation of a specified color value:
#---------------------------------------------------------------------------
def string_value ( self, color ):
""" Returns the text representation of a specified color value.
"""
return self.factory.str_color( color )
#-------------------------------------------------------------------------------
# 'ReadonlyColorEditor' class:
#-------------------------------------------------------------------------------
class ReadonlyColorEditor ( BaseReadonlyEditor ):
""" Read-only style of color editor, which displays a read-only text field
whose background color is the color 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 = QtGui.QLineEdit()
self.control.setReadOnly(True)
#---------------------------------------------------------------------------
# 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( ReadonlyColorEditor, self ).update_editor()
set_color( self )
#---------------------------------------------------------------------------
# Returns the text representation of a specified color value:
#---------------------------------------------------------------------------
def string_value ( self, color ):
""" Returns the text representation of a specified color value.
"""
return self.factory.str_color( color )
#-------------------------------------------------------------------------------
# Sets the color of the specified editor's color control:
#-------------------------------------------------------------------------------
def set_color ( editor ):
""" Sets the color of the specified color control.
"""
color = editor.factory.to_qt4_color(editor)
pal = QtGui.QPalette(editor.control.palette())
pal.setColor(QtGui.QPalette.Base, color)
if (color.red() > 192 or color.blue() > 192 or color.green() > 192):
pal.setColor(QtGui.QPalette.Text, QtCore.Qt.black)
else:
pal.setColor(QtGui.QPalette.Text, QtCore.Qt.white)
editor.control.setPalette(pal)
#----------------------------------------------------------------------------
# Creates a custom color editor panel for a specified editor:
#----------------------------------------------------------------------------
class FixedButton(QtGui.QPushButton):
""" Override to work around a bug in Qt 4.7 on Macs.
https://bugreports.qt-project.org/browse/QTBUG-15936
"""
def hitButton(self, pos):
return QtGui.QAbstractButton.hitButton(self, pos)
def color_editor_for(editor, parent):
""" Creates a custom color editor panel for a specified editor.
"""
# Create the colour samples if it hasn't already been done.
if len(color_samples) == 0:
color_choices = (0, 128, 192, 255)
for r in color_choices:
for g in color_choices:
for b in (0, 128, 255):
color_samples.append(QtGui.QColor(r, g, b))
root = QtGui.QWidget()
panel = QtGui.QHBoxLayout(root)
panel.setContentsMargins(0, 0, 0, 0)
swatch_editor = editor.factory.simple_editor(editor.ui, editor.object,
editor.name, editor.description, None)
swatch_editor.prepare(parent)
panel.addWidget(swatch_editor.control)
# Add all of the color choice buttons:
grid = QtGui.QGridLayout()
grid.setSpacing(0)
mapper = QtCore.QSignalMapper(panel)
rows = 4
cols = len(color_samples) / rows
i = 0
sheet_template = """
QPushButton {
min-height: 18px;
max-height: 18px;
min-width: 18px;
max-width: 18px;
background-color: rgb(%s);
}
"""
for r in range(rows):
for c in range(cols):
control = FixedButton()
color = color_samples[r*cols + c]
color_text = '%d,%d,%d,%d' % color.getRgb()
control.setStyleSheet(sheet_template % color_text)
control.setAttribute(QtCore.Qt.WA_LayoutUsesWidgetRect, True)
control.clicked.connect(mapper.map)
mapper.setMapping(control, color_text)
grid.addWidget(control, r, c)
editor.set_tooltip(control)
i += 1
mapper.mapped[unicode].connect(editor.update_object_from_swatch)
panel.addLayout(grid)
return root, swatch_editor
# Define the SimpleEditor, CustomEditor, etc. classes which are used by the
# editor factory for the color editor.
SimpleEditor = SimpleColorEditor
CustomEditor = CustomColorEditor
TextEditor = TextColorEditor
ReadonlyEditor = ReadonlyColorEditor
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