--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Helpviewer/AdBlock/AdBlockTreeWidget.py Sat Aug 04 13:30:04 2012 +0200
@@ -0,0 +1,266 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a tree widget for the AdBlock configuration dialog.
+"""
+
+from PyQt4.QtCore import Qt
+from PyQt4.QtGui import QAbstractItemView, QFont, QTreeWidgetItem, QInputDialog, \
+ QLineEdit, QMenu, QApplication, QColor
+
+from E5Gui.E5TreeWidget import E5TreeWidget
+
+from .AdBlockRule import AdBlockRule
+
+
+class AdBlockTreeWidget(E5TreeWidget):
+ """
+ Class implementing a tree widget for the AdBlock configuration dialog.
+ """
+ def __init__(self, subscription, parent=None):
+ """
+ Constructor
+
+ @param subscription reference to the subscription (AdBlockSubscription)
+ @param parenbt reference to the parent widget (QWidget)
+ """
+ super().__init__(parent)
+
+ self.__subscription = subscription
+ self.__topItem = None
+ self.__ruleToBeSelected = ""
+ self.__itemChangingBlock = False
+
+ self.setContextMenuPolicy(Qt.CustomContextMenu)
+ self.setDefaultItemShowMode(E5TreeWidget.ItemsExpanded)
+ self.setHeaderHidden(True)
+ self.setAlternatingRowColors(True)
+
+ self.customContextMenuRequested.connect(self.__contextMenuRequested)
+ self.itemChanged.connect(self.__itemChanged)
+ self.__subscription.changed.connect(self.__subscriptionChanged)
+ self.__subscription.rulesChanged.connect(self.__subscriptionChanged)
+
+ def subscription(self):
+ """
+ Public method to get a reference to the subscription.
+
+ @return reference to the subscription (AdBlockSubscription)
+ """
+ return self.__subscription
+
+ def showRule(self, rule):
+ """
+ Public method to highlight the given rule.
+
+ @param rule AdBlock rule to be shown (AdBlockRule)
+ """
+ if rule:
+ self.__ruleToBeSelected = rule.filter()
+ if not self.__topItem:
+ return
+ if self.__ruleToBeSelected:
+ items = self.findItems(self.__ruleToBeSelected, Qt.MatchRecursive)
+ if items:
+ item = items[0]
+ self.setCurrentItem(item)
+ self.scrollToItem(item, QAbstractItemView.PositionAtCenter)
+
+ self.__ruleToBeSelected = ""
+
+ def refresh(self):
+ """
+ Public method to refresh the tree.
+ """
+ QApplication.setOverrideCursor(Qt.WaitCursor)
+ self.__itemChangingBlock = True
+ self.clear()
+
+ boldFont = QFont()
+ boldFont.setBold(True)
+
+ self.__topItem = QTreeWidgetItem(self)
+ self.__topItem.setText(0, self.__subscription.title())
+ self.__topItem.setFont(0, boldFont)
+ self.addTopLevelItem(self.__topItem)
+
+ allRules = self.__subscription.allRules()
+
+ index = 0
+ for rule in allRules:
+ item = QTreeWidgetItem(self.__topItem)
+ item.setText(0, rule.filter())
+ item.setData(0, Qt.UserRole, index)
+ if self.__subscription.canEditRules():
+ item.setFlags(item.flags() | Qt.ItemIsEditable)
+ self.__adjustItemFeatures(item, rule)
+ index += 1
+
+ self.expandAll()
+ self.showRule(None)
+ self.__itemChangingBlock = False
+ QApplication.restoreOverrideCursor()
+ QApplication.processEvents()
+
+ def addRule(self):
+ """
+ Public slot to add a new rule.
+ """
+ if not self.__subscription.canEditRules():
+ return
+
+ filter = QInputDialog.getText(
+ self,
+ self.trUtf8("Add Custom Rule"),
+ self.trUtf8("Write your rule here:"),
+ QLineEdit.Normal)
+ if filter == "":
+ return
+
+ rule = AdBlockRule(filter, self.__subscription)
+ offset = self.__subscription.addRule(rule)
+
+ item = QTreeWidgetItem()
+ item.setText(0, filter)
+ item.setData(0, Qt.UserRole, offset)
+ item.setFlags(item.flags() | Qt.ItemIsEditable)
+
+ self.__itemChangingBlock = True
+ self.__topItem.addChild(item)
+ self.__itemChangingBlock = False
+
+ self.__adjustItemFeatures(item, rule)
+
+ def removeRule(self):
+ """
+ Public slot to remove the current rule.
+ """
+ item = self.currentItem()
+ if item is None or \
+ not self.__subscription.canEditRules() or \
+ item == self.__topItem:
+ return
+
+ offset = item.data(0, Qt.UserRole)
+ self.__subscription.removeRule(offset)
+ self.deleteItem(item)
+
+ def __contextMenuRequested(self, pos):
+ """
+ Private slot to show the context menu.
+
+ @param pos position for the menu (QPoint)
+ """
+ if not self.__subscription.canEditRules():
+ return
+
+ item = self.itemAt(pos)
+ if item is None:
+ return
+
+ menu = QMenu()
+ menu.addAction(self.trUtf8("Add Rule"), self.addRule)
+ menu.addSeparator()
+ act = menu.addAction(self.trUtf8("Remove Rule"), self.removeRule)
+ if item.parent() is None:
+ act.setDisabled(True)
+
+ menu.exec_(self.viewport().mapToGlobal(pos))
+
+ def __itemChanged(self, itm):
+ """
+ Private slot to handle the change of an item.
+
+ @param itm changed item (QTreeWidgetItem)
+ """
+ if itm is None or self.__itemChangingBlock:
+ return
+
+ self.__itemChangingBlock = True
+
+ offset = itm.data(0, Qt.UserRole)
+ oldRule = self.__subscription.rule(offset)
+
+ if itm.checkState(0) == Qt.Unchecked and oldRule.isEnabled():
+ # Disable rule
+ rule = self.__subscription.setRuleEnabled(offset, False)
+ self.__adjustItemFeatures(itm, rule)
+ elif itm.checkState(0) == Qt.Checked and not oldRule.isEnabled():
+ # Enable rule
+ rule = self.__subscription.setRuleEnabled(offset, True)
+ self.__adjustItemFeatures(itm, rule)
+ elif self.__subscription.canEditRules():
+ # Custom rule has been changed
+ rule = self.__subscription.replaceRule(
+ AdBlockRule(itm.text(0), self.__subscription), offset)
+ self.__adjustItemFeatures(itm, rule)
+
+ self.__itemChangingBlock = False
+
+ def __copyFilter(self):
+ """
+ Private slot to copy the current filter to the clipboard.
+ """
+ item = self.currentItem()
+ if item is not None:
+ QApplication.clipboard().setText(item.text(0))
+
+ def __subscriptionChanged(self):
+ """
+ Private slot handling a subscription change.
+ """
+ self.refresh()
+
+ self.__itemChangingBlock = True
+ self.__topItem.setText(0,
+ self.trUtf8("{0} (recently updated)").format(self.__subscription.title()))
+ self.__itemChangingBlock = False
+
+ def __adjustItemFeatures(self, itm, rule):
+ """
+ Private method to adjust an item.
+
+ @param itm item to be adjusted (QTreeWidgetItem)
+ @param rule rule for the adjustment (AdBlockRule)
+ """
+ if not rule.isEnabled():
+ font = QFont()
+ font.setItalic(True)
+ itm.setForeground(0, QColor(Qt.gray))
+
+ if not rule.isComment():
+ itm.setFlags(itm.flags() | Qt.ItemIsUserCheckable)
+ itm.setCheckState(0, Qt.Unchecked)
+ itm.setFont(0, font)
+
+ return
+
+ itm.setFlags(itm.flags() | Qt.ItemIsUserCheckable)
+ itm.setCheckState(0, Qt.Checked)
+
+ if rule.isCSSRule():
+ itm.setForeground(0, QColor(Qt.darkBlue))
+ itm.setFont(0, QFont())
+ elif rule.isException():
+ itm.setForeground(0, QColor(Qt.darkGreen))
+ itm.setFont(0, QFont())
+ else:
+ itm.setForeground(0, QColor())
+ itm.setFont(0, QFont())
+
+ def keyPressEvent(self, evt):
+ """
+ Protected method handling key presses.
+
+ @param evt key press event (QKeyEvent)
+ """
+ if evt.key() == Qt.Key_C and \
+ evt.modifiers() & Qt.ControlModifier:
+ self.__copyFilter()
+ elif evt.key() == Qt.Key_Delete:
+ self.removeRule()
+ else:
+ super().keyPressEvent(evt)
