/
helperwidgets.py
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/
helperwidgets.py
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# -*- coding: utf-8 -*-
#
# Copyright © Spyder Project Contributors
# Licensed under the terms of the MIT License
# (see spyder/__init__.py for details)
"""
Helper widgets.
"""
# Standard imports
import re
# Third party imports
import qstylizer.style
from qtpy import PYQT5
from qtpy.QtCore import QPoint, QRegExp, QSize, QSortFilterProxyModel, Qt
from qtpy.QtGui import (QAbstractTextDocumentLayout, QColor, QFontMetrics,
QPainter, QRegExpValidator, QTextDocument, )
from qtpy.QtWidgets import (QApplication, QCheckBox, QLineEdit, QMessageBox,
QSpacerItem, QStyle, QStyledItemDelegate,
QStyleOptionFrame, QStyleOptionViewItem,
QToolButton, QToolTip, QVBoxLayout)
# Local imports
from spyder.config.base import _
from spyder.utils.icon_manager import ima
from spyder.utils.stringmatching import get_search_regex
from spyder.utils.palette import QStylePalette
# Valid finder chars. To be improved
VALID_ACCENT_CHARS = "ÁÉÍOÚáéíúóàèìòùÀÈÌÒÙâêîôûÂÊÎÔÛäëïöüÄËÏÖÜñÑ"
VALID_FINDER_CHARS = r"[A-Za-z\s{0}]".format(VALID_ACCENT_CHARS)
class HelperToolButton(QToolButton):
"""Subclasses QToolButton, to provide a simple tooltip on mousedown.
"""
def __init__(self):
QToolButton.__init__(self)
self.setIcon(ima.get_std_icon('MessageBoxInformation'))
style = """
QToolButton {
padding:0px;
border-radius: 2px;
}
"""
self.setStyleSheet(style)
def setToolTip(self, text):
self._tip_text = text
def toolTip(self):
return self._tip_text
def mousePressEvent(self, event):
QToolTip.hideText()
def mouseReleaseEvent(self, event):
QToolTip.showText(self.mapToGlobal(QPoint(0, self.height())),
self._tip_text)
class MessageCheckBox(QMessageBox):
"""
A QMessageBox derived widget that includes a QCheckBox aligned to the right
under the message and on top of the buttons.
"""
def __init__(self, *args, **kwargs):
super(MessageCheckBox, self).__init__(*args, **kwargs)
self.setWindowModality(Qt.NonModal)
self._checkbox = QCheckBox(self)
# Set layout to include checkbox
size = 9
check_layout = QVBoxLayout()
check_layout.addItem(QSpacerItem(size, size))
check_layout.addWidget(self._checkbox, 0, Qt.AlignRight)
check_layout.addItem(QSpacerItem(size, size))
# Access the Layout of the MessageBox to add the Checkbox
layout = self.layout()
if PYQT5:
layout.addLayout(check_layout, 1, 2)
else:
layout.addLayout(check_layout, 1, 1)
# --- Public API
# Methods to access the checkbox
def is_checked(self):
return self._checkbox.isChecked()
def set_checked(self, value):
return self._checkbox.setChecked(value)
def set_check_visible(self, value):
self._checkbox.setVisible(value)
def is_check_visible(self):
self._checkbox.isVisible()
def checkbox_text(self):
self._checkbox.text()
def set_checkbox_text(self, text):
self._checkbox.setText(text)
class HTMLDelegate(QStyledItemDelegate):
"""With this delegate, a QListWidgetItem or a QTableItem can render HTML.
Taken from https://stackoverflow.com/a/5443112/2399799
"""
def __init__(self, parent, margin=0):
super(HTMLDelegate, self).__init__(parent)
self._margin = margin
def _prepare_text_document(self, option, index):
# This logic must be shared between paint and sizeHint for consistency
options = QStyleOptionViewItem(option)
self.initStyleOption(options, index)
doc = QTextDocument()
doc.setDocumentMargin(self._margin)
doc.setHtml(options.text)
return options, doc
def paint(self, painter, option, index):
options, doc = self._prepare_text_document(option, index)
style = (QApplication.style() if options.widget is None
else options.widget.style())
options.text = ""
# Note: We need to pass the options widget as an argument of
# drawCrontol to make sure the delegate is painted with a style
# consistent with the widget in which it is used.
# See spyder-ide/spyder#10677.
style.drawControl(QStyle.CE_ItemViewItem, options, painter,
options.widget)
ctx = QAbstractTextDocumentLayout.PaintContext()
textRect = style.subElementRect(QStyle.SE_ItemViewItemText,
options, None)
painter.save()
# Adjustments for the file switcher
if hasattr(options.widget, 'files_list'):
if style.objectName() in ['oxygen', 'qtcurve', 'breeze']:
if options.widget.files_list:
painter.translate(textRect.topLeft() + QPoint(4, -9))
else:
painter.translate(textRect.topLeft())
else:
if options.widget.files_list:
painter.translate(textRect.topLeft() + QPoint(4, 4))
else:
painter.translate(textRect.topLeft() + QPoint(2, 4))
else:
painter.translate(textRect.topLeft() + QPoint(0, -3))
# Type check: Prevent error in PySide where using
# doc.documentLayout().draw() may fail because doc.documentLayout()
# returns an object of type QtGui.QStandardItem (for whatever reason).
docLayout = doc.documentLayout()
if type(docLayout) is QAbstractTextDocumentLayout:
docLayout.draw(painter, ctx)
painter.restore()
def sizeHint(self, option, index):
__, doc = self._prepare_text_document(option, index)
return QSize(round(doc.idealWidth()), round(doc.size().height() - 2))
class ItemDelegate(QStyledItemDelegate):
def __init__(self, parent):
QStyledItemDelegate.__init__(self, parent)
def paint(self, painter, option, index):
options = QStyleOptionViewItem(option)
self.initStyleOption(options, index)
style = (QApplication.style() if options.widget is None
else options.widget.style())
doc = QTextDocument()
doc.setDocumentMargin(0)
doc.setHtml(options.text)
options.text = ""
style.drawControl(QStyle.CE_ItemViewItem, options, painter)
ctx = QAbstractTextDocumentLayout.PaintContext()
textRect = style.subElementRect(QStyle.SE_ItemViewItemText,
options, None)
painter.save()
painter.translate(textRect.topLeft())
painter.setClipRect(textRect.translated(-textRect.topLeft()))
doc.documentLayout().draw(painter, ctx)
painter.restore()
def sizeHint(self, option, index):
options = QStyleOptionViewItem(option)
self.initStyleOption(options, index)
doc = QTextDocument()
doc.setHtml(options.text)
doc.setTextWidth(options.rect.width())
return QSize(int(doc.idealWidth()), int(doc.size().height()))
class IconLineEdit(QLineEdit):
"""
Custom QLineEdit that includes an icon representing a validation for its
text and can also elide it.
"""
def __init__(self, parent, elide_text=False, ellipsis_place=Qt.ElideLeft):
super().__init__(parent)
self.elide_text = elide_text
self.ellipsis_place = ellipsis_place
self._status = True
self._status_set = True
self._focus_in = False
self._valid_icon = ima.icon('todo')
self._invalid_icon = ima.icon('warning')
self._set_icon = ima.icon('todo_list')
self._refresh()
self._paint_count = 0
self._icon_visible = False
def _refresh(self):
"""
This makes space for the right validation icons after focus is given to
the widget.
"""
padding = self.height()
if self.elide_text and not self._focus_in:
padding = 0
css = qstylizer.style.StyleSheet()
css.QLineEdit.setValues(
border='none',
paddingRight=f"{padding}px"
)
self.setStyleSheet(css.toString())
self.update()
def hide_status_icon(self):
"""Show the status icon."""
self._icon_visible = False
self.repaint()
self.update()
def show_status_icon(self):
"""Hide the status icon."""
self._icon_visible = True
self.repaint()
self.update()
def update_status(self, value, value_set):
"""Update the status and set_status to update the icons to display."""
self._status = value
self._status_set = value_set
self.repaint()
self.update()
def paintEvent(self, event):
"""
Include a validation icon to the left of the line edit and elide text
if requested.
"""
# Elide text if requested.
# See PR spyder-ide/spyder#20005 for context.
if self.elide_text and not self._focus_in:
# This code is taken for the most part from the
# AmountEdit.paintEvent method, part of the Electrum project. See
# the Electrum entry in our NOTICE.txt file for the details.
# Licensed under the MIT license.
painter = QPainter(self)
option = QStyleOptionFrame()
self.initStyleOption(option)
text_rect = self.style().subElementRect(
QStyle.SE_LineEditContents, option, self)
text_rect.adjust(0, 0, -2, 0)
fm = QFontMetrics(self.font())
text = fm.elidedText(self.text(), self.ellipsis_place,
text_rect.width())
painter.setPen(QColor(QStylePalette.COLOR_TEXT_1))
painter.drawText(text_rect, int(Qt.AlignLeft | Qt.AlignVCenter),
text)
return
super().paintEvent(event)
painter = QPainter(self)
rect = self.geometry()
space = int((rect.height())/6)
h = rect.height() - space
w = rect.width() - h
if self._icon_visible:
if self._status and self._status_set:
pixmap = self._set_icon.pixmap(h, h)
elif self._status:
pixmap = self._valid_icon.pixmap(h, h)
else:
pixmap = self._invalid_icon.pixmap(h, h)
painter.drawPixmap(w, 2, pixmap)
# Small hack to guarantee correct padding on Spyder start
if self._paint_count < 5:
self._paint_count += 1
self._refresh()
def focusInEvent(self, event):
"""Reimplemented to know when this widget has received focus."""
self._focus_in = True
self._refresh()
super().focusInEvent(event)
def focusOutEvent(self, event):
"""Reimplemented to know when this widget has lost focus."""
self._focus_in = False
self._refresh()
super().focusOutEvent(event)
class FinderLineEdit(QLineEdit):
"""QLineEdit for filtering listed elements in the parent widget."""
def __init__(self, parent, callback=None, main=None,
regex_base=VALID_FINDER_CHARS):
super(FinderLineEdit, self).__init__(parent)
self._parent = parent
self.main = main
# Widget setup
regex = QRegExp(regex_base + "{100}")
self.setValidator(QRegExpValidator(regex))
# Signals
if callback:
self.textChanged.connect(callback)
def set_text(self, text):
"""Set the filter text."""
text = text.strip()
new_text = self.text() + text
self.setText(new_text)
def keyPressEvent(self, event):
"""
Qt Override.
The parent needs to implement the methods to handle focus on the
next/previous row and a action over the selected element.
This should be override.
"""
key = event.key()
if key in [Qt.Key_Up]:
self._parent.previous_row()
elif key in [Qt.Key_Down]:
self._parent.next_row()
elif key in [Qt.Key_Enter, Qt.Key_Return]:
self._parent.selected_element()
else:
super(FinderLineEdit, self).keyPressEvent(event)
class CustomSortFilterProxy(QSortFilterProxyModel):
"""Custom column filter based on regex."""
def __init__(self, parent=None):
super(CustomSortFilterProxy, self).__init__(parent)
self._parent = parent
self.pattern = re.compile(r'')
def set_filter(self, text):
"""Set regular expression for filter."""
self.pattern = get_search_regex(text)
if self.pattern and text:
self._parent.setSortingEnabled(False)
else:
self._parent.setSortingEnabled(True)
self.invalidateFilter()
def filterAcceptsRow(self, row_num, parent):
"""Qt override.
Reimplemented from base class to allow the use of custom filtering.
"""
model = self.sourceModel()
name = model.row(row_num).name
r = re.search(self.pattern, name)
if r is None:
return False
else:
return True
def test_msgcheckbox():
from spyder.utils.qthelpers import qapplication
app = qapplication()
box = MessageCheckBox()
box.setWindowTitle(_("Spyder updates"))
box.setText("Testing checkbox")
box.set_checkbox_text("Check for updates on startup?")
box.setStandardButtons(QMessageBox.Ok)
box.setDefaultButton(QMessageBox.Ok)
box.setIcon(QMessageBox.Information)
box.exec_()
if __name__ == '__main__':
test_msgcheckbox()