eric6/E5Gui/E5SqueezeLabels.py

Wed, 30 Dec 2020 11:00:44 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 30 Dec 2020 11:00:44 +0100
branch
maintenance
changeset 7924
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parent 7780
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child 8143
2c730d5fd177
permissions
-rw-r--r--

Updated copyright for 2021.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2008 - 2021 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 PyQt5.QtCore import Qt
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12 from PyQt5.QtWidgets 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(E5SqueezeLabel, self).__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 try:
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40 pixelLength = fm.horizontalAdvance(self.__text)
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41 except AttributeError:
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42 pixelLength = fm.width(self.__text)
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43 if pixelLength > self.contentsRect().width():
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44 self.__elided = fm.elidedText(
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45 self.text(), Qt.ElideMiddle, self.width())
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46 super(E5SqueezeLabel, self).setText(self.__elided)
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47 else:
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48 super(E5SqueezeLabel, self).setText(self.__text)
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49 super(E5SqueezeLabel, self).paintEvent(event)
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50
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51 def setText(self, txt):
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52 """
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53 Public method to set the label's text.
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54
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55 @param txt the text to be shown (string)
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56 """
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57 self.__text = txt
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58 super(E5SqueezeLabel, self).setText(self.__text)
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59
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60
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61 class E5SqueezeLabelPath(QLabel):
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62 """
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63 Class implementing a label showing a file path compacted to fit its size.
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64 """
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65 def __init__(self, parent=None):
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66 """
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67 Constructor
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68
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69 @param parent reference to the parent Widget (QWidget)
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70 """
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71 super(E5SqueezeLabelPath, self).__init__(parent)
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72
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73 self.__path = ''
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74 self.__surrounding = "{0}"
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75
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76 def setSurrounding(self, surrounding):
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77 """
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78 Public method to set the surrounding of the path string.
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79
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80 @param surrounding the a string containg placeholders for the path
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81 (string)
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82 """
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83 self.__surrounding = surrounding
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84 super(E5SqueezeLabelPath, self).setText(
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85 self.__surrounding.format(self.__path))
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86
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87 def setPath(self, path):
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88 """
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89 Public method to set the path of the label.
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90
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91 @param path path to be shown (string)
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92 """
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93 self.__path = path
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94 super(E5SqueezeLabelPath, self).setText(
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95 self.__surrounding.format(self.__path))
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96
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97 def setTextPath(self, surrounding, path):
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98 """
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99 Public method to set the surrounding and the path of the label.
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100
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101 @param surrounding the a string containg placeholders for the path
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102 (string)
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103 @param path path to be shown (string)
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104 """
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105 self.__surrounding = surrounding
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106 self.__path = path
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107 super(E5SqueezeLabelPath, self).setText(
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108 self.__surrounding.format(self.__path))
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109
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110 def paintEvent(self, event):
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111 """
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112 Protected method called when some painting is required.
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113
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114 @param event reference to the paint event (QPaintEvent)
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115 """
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116 if self.length(self.__path) > self.contentsRect().width():
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117 super(E5SqueezeLabelPath, self).setText(
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118 self.__surrounding.format(compactPath(self.__path,
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119 self.contentsRect().width(),
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120 self.length))
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121 )
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122 else:
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123 super(E5SqueezeLabelPath, self).setText(
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124 self.__surrounding.format(self.__path))
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125 super(E5SqueezeLabelPath, self).paintEvent(event)
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126
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127 def length(self, txt):
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128 """
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129 Public method to return the length of a text in pixels.
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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130
b5c84934de9c Renamed E4Gui to E5Gui.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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131 @param txt text to calculate the length for after wrapped (string)
b5c84934de9c Renamed E4Gui to E5Gui.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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132 @return length of the wrapped text in pixels (integer)
b5c84934de9c Renamed E4Gui to E5Gui.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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133 """
7366
bd743eacfbca Changed code to avoid some obsoleted Qt functions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7360
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134 fm = self.fontMetrics()
bd743eacfbca Changed code to avoid some obsoleted Qt functions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7360
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135 try:
bd743eacfbca Changed code to avoid some obsoleted Qt functions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7360
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136 return fm.horizontalAdvance(self.__surrounding.format(txt))
bd743eacfbca Changed code to avoid some obsoleted Qt functions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7360
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137 except AttributeError:
bd743eacfbca Changed code to avoid some obsoleted Qt functions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7360
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138 return fm.width(self.__surrounding.format(txt))

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