--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eric7/EricWidgets/EricLineEdit.py Sat May 22 19:58:24 2021 +0200
@@ -0,0 +1,264 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2009 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing specialized line edits.
+"""
+
+import enum
+
+from PyQt6.QtCore import pyqtSignal, Qt, QEvent
+from PyQt6.QtWidgets import (
+ QLineEdit, QWidget, QHBoxLayout, QBoxLayout, QLayout, QApplication,
+ QSpacerItem, QSizePolicy
+)
+
+
+class EricLineEditSideWidget(QWidget):
+ """
+ Class implementing the side widgets for the line edit class.
+
+ @signal sizeHintChanged() emitted to indicate a change of the size hint
+ """
+ sizeHintChanged = pyqtSignal()
+
+ def __init__(self, parent=None):
+ """
+ Constructor
+
+ @param parent reference to the parent widget (QWidget)
+ """
+ super().__init__(parent)
+
+ def event(self, evt):
+ """
+ Public method to handle events.
+
+ @param evt reference to the event (QEvent)
+ @return flag indicating, whether the event was recognized (boolean)
+ """
+ if evt.type() == QEvent.Type.LayoutRequest:
+ self.sizeHintChanged.emit()
+ return QWidget.event(self, evt)
+
+
+class EricLineEditSide(enum.Enum):
+ """
+ Class defining the line edit sides.
+ """
+ LEFT = 0
+ RIGHT = 1
+
+
+class EricLineEdit(QLineEdit):
+ """
+ Class implementing a line edit widget showing some inactive text.
+ """
+ def __init__(self, parent=None, placeholderText=""):
+ """
+ Constructor
+
+ @param parent reference to the parent widget
+ @type QWidget
+ @param placeholderText text to be shown on inactivity
+ @type str
+ """
+ super().__init__(parent)
+
+ self.setMinimumHeight(22)
+
+ self.setPlaceholderText(placeholderText)
+
+ self.__mainLayout = QHBoxLayout(self)
+ self.__mainLayout.setContentsMargins(0, 0, 0, 0)
+ self.__mainLayout.setSpacing(0)
+
+ self.__leftMargin = 0
+ self.__leftWidget = EricLineEditSideWidget(self)
+ self.__leftWidget.resize(0, 0)
+ self.__leftLayout = QHBoxLayout(self.__leftWidget)
+ self.__leftLayout.setContentsMargins(0, 0, 2, 0)
+ if QApplication.isRightToLeft():
+ self.__leftLayout.setDirection(QBoxLayout.Direction.RightToLeft)
+ else:
+ self.__leftLayout.setDirection(QBoxLayout.Direction.LeftToRight)
+ self.__leftLayout.setSizeConstraint(
+ QLayout.SizeConstraint.SetFixedSize)
+
+ self.__rightWidget = EricLineEditSideWidget(self)
+ self.__rightWidget.resize(0, 0)
+ self.__rightLayout = QHBoxLayout(self.__rightWidget)
+ self.__rightLayout.setContentsMargins(0, 0, 2, 0)
+ if self.isRightToLeft():
+ self.__rightLayout.setDirection(QBoxLayout.Direction.RightToLeft)
+ else:
+ self.__rightLayout.setDirection(QBoxLayout.Direction.LeftToRight)
+
+ horizontalSpacer = QSpacerItem(
+ 0, 0, QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Minimum)
+ self.__mainLayout.addWidget(
+ self.__leftWidget, 0,
+ Qt.AlignmentFlag.AlignVCenter | Qt.AlignmentFlag.AlignLeft)
+ self.__mainLayout.addItem(horizontalSpacer)
+ self.__mainLayout.addWidget(
+ self.__rightWidget, 0,
+ Qt.AlignmentFlag.AlignVCenter | Qt.AlignmentFlag.AlignRight)
+ if self.isRightToLeft():
+ self.__mainLayout.setDirection(QBoxLayout.Direction.RightToLeft)
+ else:
+ self.__mainLayout.setDirection(QBoxLayout.Direction.LeftToRight)
+
+ self.setWidgetSpacing(3)
+ self.__leftWidget.sizeHintChanged.connect(self._updateTextMargins)
+ self.__rightWidget.sizeHintChanged.connect(self._updateTextMargins)
+
+ def setLeftMargin(self, margin):
+ """
+ Public method to set the left margin.
+
+ @param margin left margin in pixel (integer)
+ """
+ self.__leftMargin = margin
+
+ def leftMargin(self):
+ """
+ Public method to get the size of the left margin.
+
+ @return left margin in pixel (integer)
+ """
+ return self.__leftMargin
+
+ def event(self, evt):
+ """
+ Public method to handle events.
+
+ @param evt reference to the event (QEvent)
+ @return flag indicating, whether the event was recognized (boolean)
+ """
+ if evt.type() == QEvent.Type.LayoutDirectionChange:
+ if self.isRightToLeft():
+ self.__mainLayout.setDirection(
+ QBoxLayout.Direction.RightToLeft)
+ self.__leftLayout.setDirection(
+ QBoxLayout.Direction.RightToLeft)
+ self.__rightLayout.setDirection(
+ QBoxLayout.Direction.RightToLeft)
+ else:
+ self.__mainLayout.setDirection(
+ QBoxLayout.Direction.LeftToRight)
+ self.__leftLayout.setDirection(
+ QBoxLayout.Direction.LeftToRight)
+ self.__rightLayout.setDirection(
+ QBoxLayout.Direction.LeftToRight)
+ return QLineEdit.event(self, evt)
+
+ def _updateTextMargins(self):
+ """
+ Protected slot to update the text margins.
+ """
+ left = (
+ self.__leftWidget.sizeHint().width()
+ if self.__leftMargin == 0 else
+ self.__leftMargin
+ )
+ right = self.__rightWidget.sizeHint().width()
+ top = 0
+ bottom = 0
+ self.setTextMargins(left, top, right, bottom)
+
+ def addWidget(self, widget, position):
+ """
+ Public method to add a widget to a side.
+
+ @param widget reference to the widget to add
+ @type QWidget
+ @param position position to add to
+ @type EricLineEditSide
+ """
+ if widget is None:
+ return
+
+ if self.isRightToLeft():
+ if position == EricLineEditSide.LEFT:
+ position = EricLineEditSide.RIGHT
+ else:
+ position = EricLineEditSide.LEFT
+ if position == EricLineEditSide.LEFT:
+ self.__leftLayout.addWidget(widget)
+ else:
+ self.__rightLayout.insertWidget(1, widget)
+
+ def removeWidget(self, widget):
+ """
+ Public method to remove a widget from a side.
+
+ @param widget reference to the widget to remove
+ @type QWidget
+ """
+ if widget is None:
+ return
+
+ self.__leftLayout.removeWidget(widget)
+ self.__rightLayout.removeWidget(widget)
+ widget.hide()
+
+ def widgetSpacing(self):
+ """
+ Public method to get the side widget spacing.
+
+ @return side widget spacing (integer)
+ """
+ return self.__leftLayout.spacing()
+
+ def setWidgetSpacing(self, spacing):
+ """
+ Public method to set the side widget spacing.
+
+ @param spacing side widget spacing (integer)
+ """
+ self.__leftLayout.setSpacing(spacing)
+ self.__rightLayout.setSpacing(spacing)
+ self._updateTextMargins()
+
+ def textMargin(self, position):
+ """
+ Public method to get the text margin for a side.
+
+ @param position side to get margin for
+ @type EricLineEditSide
+ @return text margin
+ @rtype int
+ """
+ spacing = self.__rightLayout.spacing()
+ w = 0
+ w = (
+ self.__leftWidget.sizeHint().width()
+ if position == EricLineEditSide.LEFT else
+ self.__rightWidget.sizeHint().width()
+ )
+ if w == 0:
+ return 0
+ return w + spacing * 2
+
+class EricClearableLineEdit(EricLineEdit):
+ """
+ Class implementing a line edit widget showing some inactive text and a
+ clear button, if it has some contents.
+ """
+ def __init__(self, parent=None, placeholderText="",
+ side=EricLineEditSide.RIGHT):
+ """
+ Constructor
+
+ @param parent reference to the parent widget
+ @type QWidget
+ @param placeholderText text to be shown on inactivity
+ @type str
+ @param side side the clear button should be shown at
+ @type EricLineEditSide
+ """
+ super().__init__(parent, placeholderText)
+
+ self.setClearButtonEnabled(True)
