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Viewing changes to spyderlib/widgets/colors.py

  • Committer: Bazaar Package Importer
  • Author(s): Picca Frédéric-Emmanuel
  • Date: 2011-03-05 18:03:43 UTC
  • mfrom: (1.1.3 upstream)
  • Revision ID: james.westby@ubuntu.com-20110305180343-its88tucbyvtevjf
Tags: 2.0.8-1
http://bugs.debian.org/609789
* Imported Upstream version 2.0.8 (Closes: #609789)
* add a watch file
* build for all python2 versions (it can be use as module by other packages)
* change the documentation section to Programming/Python
* use the Recommendes found in the documentation.

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spyderlib/widgets/colors.py
 
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# -*- coding: utf-8 -*-
 
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from PyQt4.QtGui import (QLineEdit, QIcon, QHBoxLayout, QColor, QPushButton,
 
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                         QColorDialog, QPixmap)
 
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from PyQt4.QtCore import SIGNAL, QSize, QString, pyqtSignature, pyqtProperty
 
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class ColorButton(QPushButton):
 
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    """
 
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    Color choosing push button
 
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    """
 
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    __pyqtSignals__ = ("colorChanged(QColor)",)
 
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    def __init__(self, parent=None):
 
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        QPushButton.__init__(self, parent)
 
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        self.setFixedSize(20, 20)
 
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        self.setIconSize(QSize(12, 12))
 
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        self.connect(self, SIGNAL("clicked()"), self.choose_color)
 
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        self._color = QColor()
 
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    def choose_color(self):
 
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        rgba, valid = QColorDialog.getRgba(self._color.rgba(),
 
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                                           self.parentWidget())
 
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        if valid:
 
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            color = QColor.fromRgba(rgba)
 
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            self.set_color(color)
 
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    def get_color(self):
 
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        return self._color
 
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    @pyqtSignature("QColor")
 
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    def set_color(self, color):
 
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        if color != self._color:
 
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            self._color = color
 
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            self.emit(SIGNAL("colorChanged(QColor)"), self._color)
 
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            pixmap = QPixmap(self.iconSize())
 
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            pixmap.fill(color)
 
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            self.setIcon(QIcon(pixmap))
 
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    color = pyqtProperty("QColor", get_color, set_color)
 
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def text_to_qcolor(text):
 
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    """
 
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    Create a QColor from specified string
 
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    Avoid warning from Qt when an invalid QColor is instantiated
 
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    """
 
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    color = QColor()
 
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    if isinstance(text, QString):
 
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        text = str(text)
 
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    if not isinstance(text, (unicode, str)):
 
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        return color
 
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    if text.startswith('#') and len(text)==7:
 
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        correct = '#0123456789abcdef'
 
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        for char in text:
 
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            if char.lower() not in correct:
 
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                return color
 
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    elif text not in list(QColor.colorNames()):
 
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        return color
 
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    color.setNamedColor(text)
 
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    return color
 
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class ColorLayout(QHBoxLayout):
 
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    """Color-specialized QLineEdit layout"""
 
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    def __init__(self, color, parent=None):
 
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        QHBoxLayout.__init__(self)
 
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        assert isinstance(color, QColor)
 
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        self.lineedit = QLineEdit(color.name(), parent)
 
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        self.connect(self.lineedit, SIGNAL("textChanged(QString)"),
 
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                     self.update_color)
 
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        self.addWidget(self.lineedit)
 
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        self.colorbtn = ColorButton(parent)
 
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        self.colorbtn.color = color
 
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        self.connect(self.colorbtn, SIGNAL("colorChanged(QColor)"),
 
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                     self.update_text)
 
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        self.addWidget(self.colorbtn)
 
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    def update_color(self, text):
 
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        color = text_to_qcolor(text)
 
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        if color.isValid():
 
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            self.colorbtn.color = color
 
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    def update_text(self, color):
 
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        self.lineedit.setText(color.name())
 
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    def text(self):
 
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        return self.lineedit.text()