Source Code for Module node_manager_fkie.editor.line_edit

 1  from python_qt_binding.QtCore import Qt 
 2  from python_qt_binding.QtGui import QIcon 
 3  try: 
 4      from python_qt_binding.QtGui import QLineEdit, QToolButton, QStyle 
 5  except: 
 6      from python_qt_binding.QtWidgets import QLineEdit, QToolButton, QStyle 
 7   
 8   
 9 -class EnchancedLineEdit(QLineEdit): 
10   
11 -    def __init__(self, parent=None): 
12          QLineEdit.__init__(self, parent) 
13          # Create a clear button with icon 
14          self.clearBtn = clearBtn = QToolButton(self) 
15          icon = QIcon.fromTheme("edit-clear", QIcon(":/icons/crystal_clear_button_close.png")) 
16          clearBtn.setIcon(icon) 
17          clearBtn.setCursor(Qt.ArrowCursor) 
18          clearBtn.setStyleSheet("QToolButton { border: none; padding: 0px; }") 
19          clearBtn.hide() 
20   
21          # signals, clear lineEdit if btn pressed; change btn visibility on input 
22          clearBtn.clicked.connect(self.clear) 
23          self.textChanged[str].connect(self.update_close_button) 
24   
25          frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth) 
26          self.setStyleSheet("QLineEdit { padding-right: %dpx; } " % (clearBtn.sizeHint().width() + frameWidth + 1)) 
27          msz = self.minimumSizeHint() 
28          self.setMinimumSize(max(msz.width(), clearBtn.sizeHint().height() + frameWidth * 2 + 2), 
29                              max(msz.height(), clearBtn.sizeHint().height() + frameWidth * 2 + 2)) 
30   
31 -    def resizeEvent(self, event): 
32          sz = self.clearBtn.sizeHint() 
33          frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth) 
34          self.clearBtn.move(self.rect().right() - frameWidth - sz.width(), 
35                             (self.rect().bottom() + 1 - sz.height()) / 2) 
36   
37 -    def update_close_button(self, text): 
38          self.clearBtn.setVisible(True if text else False) 
39   
40 -    def keyPressEvent(self, event): 
41          ''' 
42          Enable the ESC handling 
43          ''' 
44          if event.key() == Qt.Key_Escape and self.text(): 
45              self.setText('') 
46          else: 
47              event.accept() 
48              QLineEdit.keyPressEvent(self, event) 
49