qpreferences.py

Fri, 25 Jan 2008 20:50:50 +0100

author
David Douard <david.douard@logilab.fr>
date
Fri, 25 Jan 2008 20:50:50 +0100
changeset 30
1263eafdb953
parent 23
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permissions
-rw-r--r--

removed useless png files (using SVG everywhere)

23
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1 import os
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2 from PyQt4 import QtCore, QtGui, uic
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3
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4 def fromVariant(v):
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5 _cvrts = {0: lambda x:None,
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6 1: lambda x:x.toBool(),
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7 2: lambda x:x.toInt()[0],
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8 6: lambda x:x.toDouble()[0],
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9 10: lambda x:unicode(x.toString()),
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10 12: lambda x:x.toByteArray(),
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11 21: lambda x:x.toSize(),
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12 22: lambda x:x.toSizeF(),
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13 25: lambda x:x.toPoint(),
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14 26: lambda x:x.toPointF(),
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15
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16 }
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17 t = v.userType()
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18 return _cvrts[t](v)
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19
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20 class PreferenceItem(object):
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21 _id = 0
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22 def __init__(self, default=None, basetype=None, name=None, description=None):
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23 self._default = default
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24 self._basetype = basetype
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25 if self._basetype is None:
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26 self._basetype = self._default.__class__
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27 self._id = "_pref%X"%self.__class__._id
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28 self._name = name
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29 self._description = description
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30 self.__class__._id += 1
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31
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32 def __get__(self, obj, cls):
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33 if obj is None:
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34 return self
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35 try:
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36 return obj.getPref(self._id)
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37 except Exception, e:
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38 #print "humm", e
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39 return None
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40
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41 def __set__(self, obj, value):
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42 obj.setPref(self._id, value)
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43
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44 class AbstractPreferences(QtCore.QObject):
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45 def __init__(self):
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46 QtCore.QObject.__init__(self)
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47 self._settings = QtCore.QSettings(QtCore.QSettings.UserScope,
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48 self.ORGANISATION, self.APPLICATION)
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49 self._prefs = {}
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50 for k in dir(self.__class__):
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51 item = getattr(self.__class__, k)
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52 if isinstance(item, PreferenceItem):
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53 self._prefs[item._id] = k
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54
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55 def getPref(self, key):
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56 key = self._prefs.get(key, key)
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57 default = getattr(self.__class__, key)._default
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58 if default is not None:
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59 default = QtCore.QVariant(default)
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60 else:
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61 default = QtCore.QVariant()
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62 val = self._settings.value(key, default)
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63 return fromVariant(val)
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64
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65 def setPref(self, key, value):
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66 key = self._prefs.get(key, key)
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67 self._settings.setValue(key, QtCore.QVariant(value))
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68
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69 def keys(self):
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70 return [k for k in self._prefs.values() if not k.startswith('_')]
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71
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72 def getName(self, key):
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73 item = getattr(self.__class__, key)
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74 return item._name
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75
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76 def getDescription(self, key):
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77 item = getattr(self.__class__, key)
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78 return item._description
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79
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80 form_class, base_class = uic.loadUiType(os.path.join(os.path.dirname(__file__), "qpreferences_dialog.ui"))
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81
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82 class PreferencesEditor(QtGui.QDialog, form_class):
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83 def __init__(self, preferences, parent=None):
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84 QtGui.QDialog.__init__(self, parent)
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85 self.setupUi(self)
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86 self._prefs = preferences
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87 self.buildUI()
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88
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89 def buildUI(self):
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90 w = self.centralFrame
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91 g = QtGui.QGridLayout(w)
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92 p = self._prefs
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93 eds = {}
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94 self._editors = eds
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95 for i, k in enumerate(p.keys()):
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96 name = p.getName(k)
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97 if not name:
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98 name = k
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99 l = QtGui.QLabel(name, w)
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100 g.addWidget(l, i, 0)
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101 if p.getDescription(k):
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102 l.setToolTip(p.getDescription(k))
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103
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104 e = QtGui.QLineEdit(w)
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105 eds[k] = e
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106 g.addWidget(e, i, 1)
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107 val = p.getPref(k)
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108 if val is None:
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109 val = ''
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110 if not isinstance(val, basestring):
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111 val = unicode(val)
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112 e.setText(val)
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113
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114 g.addWidget(QtGui.QWidget(w), i+1, 0)
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115 g.setRowStretch(i+1,1)
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116 g.setColumnStretch(1,1)
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117
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118 def accept(self):
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119 p=self._prefs
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120 for k in p.keys():
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121 newval = unicode(self._editors[k].text())
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122 p.setPref(k, newval)
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123 return QtGui.QDialog.accept(self)
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124
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125 if __name__ == '__main__':
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126 class TestPreferences(AbstractPreferences):
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127 ORGANISATION="Logilab"
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128 APPLICATION="test_qpref_editor"
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129
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130 device = PreferenceItem('/dev/ttyUSB0', name="the device")
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131 address = PreferenceItem(5, description="GPIB address of the plotter")
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132 _pos = PreferenceItem(None)
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133 _size = PreferenceItem(None)
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134 _appState = PreferenceItem(None)
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135
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136 a = QtGui.QApplication([])
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137
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138 prefs = TestPreferences()
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139 w = PreferencesEditor(prefs)
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140 w.show()
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141 a.exec_()

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