E5Gui/E5SqueezeLabels.py

Sun, 06 Oct 2013 19:45:29 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sun, 06 Oct 2013 19:45:29 +0200
changeset 2990
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parent 2763
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child 3034
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child 3057
10516539f238
permissions
-rw-r--r--

Continued to shorten the code lines to max. 79 characters.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2008 - 2013 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing labels that squeeze their contents to fit the size of the
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8 label.
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9 """
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10
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11 from PyQt4.QtCore import Qt
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12 from PyQt4.QtGui import QLabel
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13
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14 from Utilities import compactPath
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15
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16
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17 class E5SqueezeLabel(QLabel):
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18 """
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19 Class implementing a label that squeezes its contents to fit its size.
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20 """
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21 def __init__(self, parent=None):
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22 """
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23 Constructor
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24
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25 @param parent reference to the parent Widget (QWidget)
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26 """
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27 super().__init__(parent)
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28
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29 self.__text = ''
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30 self.__elided = ''
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31
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32 def paintEvent(self, event):
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33 """
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34 Protected method called when some painting is required.
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35
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36 @param event reference to the paint event (QPaintEvent)
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37 """
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38 fm = self.fontMetrics()
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39 if fm.width(self.__text) > self.contentsRect().width():
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40 self.__elided = fm.elidedText(
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41 self.text(), Qt.ElideMiddle, self.width())
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42 super().setText(self.__elided)
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43 else:
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44 super().setText(self.__text)
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45 super().paintEvent(event)
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46
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47 def setText(self, txt):
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48 """
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49 Public method to set the label's text.
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50
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51 @param txt the text to be shown (string)
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52 """
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53 self.__text = txt
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54 super().setText(self.__text)
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56
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57 class E5SqueezeLabelPath(QLabel):
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58 """
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59 Class implementing a label showing a file path compacted to fit its size.
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60 """
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61 def __init__(self, parent=None):
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62 """
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63 Constructor
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64
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65 @param parent reference to the parent Widget (QWidget)
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66 """
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67 super().__init__(parent)
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68
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69 self.__path = ''
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70 self.__surrounding = "{0}"
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71
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72 def setSurrounding(self, surrounding):
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73 """
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74 Public method to set the surrounding of the path string.
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75
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76 @param surrounding the a string containg placeholders for the path
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77 (string)
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78 """
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79 self.__surrounding = surrounding
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80 super().setText(self.__surrounding.format(self.__path))
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81
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82 def setPath(self, path):
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83 """
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84 Public method to set the path of the label.
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85
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86 @param path path to be shown (string)
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87 """
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88 self.__path = path
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89 super().setText(self.__surrounding.format(self.__path))
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90
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91 def setTextPath(self, surrounding, path):
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92 """
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93 Public method to set the surrounding and the path of the label.
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94
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95 @param surrounding the a string containg placeholders for the path
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96 (string)
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97 @param path path to be shown (string)
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98 """
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99 self.__surrounding = surrounding
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100 self.__path = path
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101 super().setText(self.__surrounding.format(self.__path))
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102
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103 def paintEvent(self, event):
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104 """
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105 Protected method called when some painting is required.
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106
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107 @param event reference to the paint event (QPaintEvent)
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108 """
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109 fm = self.fontMetrics()
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110 if (fm.width(self.__surrounding.format(self.__path)) >
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111 self.contentsRect().width()):
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112 super().setText(
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113 self.__surrounding.format(compactPath(self.__path,
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114 self.contentsRect().width(),
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115 self.length))
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116 )
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117 else:
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118 super().setText(self.__surrounding.format(self.__path))
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119 super().paintEvent(event)
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120
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121 def length(self, txt):
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122 """
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123 Public method to return the length of a text in pixels.
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124
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125 @param txt text to calculate the length for after wrapped (string)
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126 @return length of the wrapped text in pixels (integer)
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127 """
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128 return self.fontMetrics().width(self.__surrounding.format(txt))

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