Python QtGui.QListWidget类代码示例

 def keyPressEvent(self, event):
     text, key = event.text(), event.key()
     alt = event.modifiers() & Qt.AltModifier
     shift = event.modifiers() & Qt.ShiftModifier
     ctrl = event.modifiers() & Qt.ControlModifier
     modifier = shift or ctrl or alt
     if (key in (Qt.Key_Return, Qt.Key_Enter) and self.enter_select) \
        or key == Qt.Key_Tab:
         self.item_selected()
     elif key in (Qt.Key_Return, Qt.Key_Enter,
                  Qt.Key_Left, Qt.Key_Right) or text in ('.', ':'):
         self.hide()
         self.textedit.keyPressEvent(event)
     elif key in (Qt.Key_Up, Qt.Key_Down, Qt.Key_PageUp, Qt.Key_PageDown,
                  Qt.Key_Home, Qt.Key_End,
                  Qt.Key_CapsLock) and not modifier:
         QListWidget.keyPressEvent(self, event)
     elif len(text) or key == Qt.Key_Backspace:
         self.textedit.keyPressEvent(event)
         self.update_current()
     elif modifier:
         self.textedit.keyPressEvent(event)
     else:
         self.hide()
         QListWidget.keyPressEvent(self, event)

 def __init__(self, parent, ancestor):
     QListWidget.__init__(self, ancestor)
     self.setWindowFlags(Qt.SubWindow | Qt.FramelessWindowHint)
     self.textedit = parent
     self.completion_list = None
     self.case_sensitive = False
     self.enter_select = None
     self.hide()
     self.connect(self, SIGNAL("itemActivated(QListWidgetItem*)"), self.item_selected)

    def __init__(self, parent=None):
        QDialog.__init__(self, parent)

        self.main = parent

        # Widgets
        self.pages_widget = QStackedWidget()
        self.contents_widget = QListWidget()
        self.button_reset = QPushButton(_('Reset to defaults'))

        bbox = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Apply |
                                QDialogButtonBox.Cancel)
        self.apply_btn = bbox.button(QDialogButtonBox.Apply)

        # Widgets setup
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)
        self.setWindowTitle(_('Preferences'))
        self.setWindowIcon(ima.icon('configure'))
        self.contents_widget.setMovement(QListView.Static)
        self.contents_widget.setSpacing(1)
        self.contents_widget.setCurrentRow(0)

        # Layout
        hsplitter = QSplitter()
        hsplitter.addWidget(self.contents_widget)
        hsplitter.addWidget(self.pages_widget)

        btnlayout = QHBoxLayout()
        btnlayout.addWidget(self.button_reset)
        btnlayout.addStretch(1)
        btnlayout.addWidget(bbox)

        vlayout = QVBoxLayout()
        vlayout.addWidget(hsplitter)
        vlayout.addLayout(btnlayout)

        self.setLayout(vlayout)

        # Signals and slots
        self.button_reset.clicked.connect(self.main.reset_spyder)
        self.pages_widget.currentChanged.connect(self.current_page_changed)
        self.contents_widget.currentRowChanged.connect(
                                             self.pages_widget.setCurrentIndex)
        bbox.accepted.connect(self.accept)
        bbox.rejected.connect(self.reject)
        bbox.clicked.connect(self.button_clicked)

        # Ensures that the config is present on spyder first run
        CONF.set('main', 'interface_language', load_lang_conf())

    def __init__(self, parent=None, pathlist=None, ro_pathlist=None, sync=True):
        QDialog.__init__(self, parent)
        
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)
        
        assert isinstance(pathlist, list)
        self.pathlist = pathlist
        if ro_pathlist is None:
            ro_pathlist = []
        self.ro_pathlist = ro_pathlist
        
        self.last_path = getcwd()
        
        self.setWindowTitle(_("PYTHONPATH manager"))
        self.setWindowIcon(get_icon('pythonpath.png'))
        self.resize(500, 300)
        
        self.selection_widgets = []
        
        layout = QVBoxLayout()
        self.setLayout(layout)
        
        top_layout = QHBoxLayout()
        layout.addLayout(top_layout)
        self.toolbar_widgets1 = self.setup_top_toolbar(top_layout)

        self.listwidget = QListWidget(self)
        self.connect(self.listwidget, SIGNAL("currentRowChanged(int)"),
                     self.refresh)
        layout.addWidget(self.listwidget)

        bottom_layout = QHBoxLayout()
        layout.addLayout(bottom_layout)
        self.sync_button = None
        self.toolbar_widgets2 = self.setup_bottom_toolbar(bottom_layout, sync)        
        
        # Buttons configuration
        bbox = QDialogButtonBox(QDialogButtonBox.Close)
        self.connect(bbox, SIGNAL("rejected()"), SLOT("reject()"))
        bottom_layout.addWidget(bbox)
        
        self.update_list()
        self.refresh()

    def __init__(self, parent=None):
        QDialog.__init__(self, parent)
        
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)

        self.contents_widget = QListWidget()
        self.contents_widget.setMovement(QListView.Static)
        self.contents_widget.setSpacing(1)

        bbox = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Apply
                                |QDialogButtonBox.Cancel)
        self.apply_btn = bbox.button(QDialogButtonBox.Apply)
        self.connect(bbox, SIGNAL("accepted()"), SLOT("accept()"))
        self.connect(bbox, SIGNAL("rejected()"), SLOT("reject()"))
        self.connect(bbox, SIGNAL("clicked(QAbstractButton*)"),
                     self.button_clicked)

        self.pages_widget = QStackedWidget()
        self.connect(self.pages_widget, SIGNAL("currentChanged(int)"),
                     self.current_page_changed)

        self.connect(self.contents_widget, SIGNAL("currentRowChanged(int)"),
                     self.pages_widget.setCurrentIndex)
        self.contents_widget.setCurrentRow(0)

        hsplitter = QSplitter()
        hsplitter.addWidget(self.contents_widget)
        hsplitter.addWidget(self.pages_widget)

        btnlayout = QHBoxLayout()
        btnlayout.addStretch(1)
        btnlayout.addWidget(bbox)

        vlayout = QVBoxLayout()
        vlayout.addWidget(hsplitter)
        vlayout.addLayout(btnlayout)

        self.setLayout(vlayout)

        self.setWindowTitle(_("Preferences"))
        self.setWindowIcon(get_icon("configure.png"))

 def hide(self):
     QListWidget.hide(self)
     self.textedit.setFocus()

    def __init__(self, parent, tabs, data):
        QDialog.__init__(self, parent)

        # Variables
        self.tabs = tabs                  # Editor stack tabs
        self.data = data                  # Editor data
        self.mode = self.FILE_MODE        # By default start in this mode
        self.initial_cursors = None       # {fullpath: QCursor}
        self.initial_path = None          # Fullpath of initial active editor
        self.initial_editor = None        # Initial active editor
        self.line_number = None           # Selected line number in filer

        help_text = _("Press <b>Enter</b> to switch files or <b>Esc</b> to "
                      "cancel.<br><br>Type to filter filenames.<br><br>"
                      "Use <b>:number</b> to go to a line, e.g. "
                      "<b><code>main:42</code></b><br>"
                      "Use <b>@symbol_text</b> to go to a symbol, e.g. "
                      "<b><code>@init</code></b>"
                      "<br><br> Press <b>Ctrl+W</b> to close current tab.<br>")

        # Either allow searching for a line number or a symbol but not both
        regex = QRegExp("([A-Za-z0-9_]{0,100}@[A-Za-z0-9_]{0,100})|" +
                        "([A-Za-z]{0,100}:{0,1}[0-9]{0,100})")

        # Widgets
        self.edit = QLineEdit(self)
        self.help = HelperToolButton()
        self.list = QListWidget(self)
        self.filter = KeyPressFilter()
        regex_validator = QRegExpValidator(regex, self.edit)

        # Widgets setup
        self.setWindowFlags(Qt.Popup | Qt.FramelessWindowHint)
        self.setWindowOpacity(0.95)
        self.edit.installEventFilter(self.filter)
        self.edit.setValidator(regex_validator)
        self.help.setToolTip(help_text)
        self.list.setItemDelegate(HTMLDelegate(self))

        # Layout
        edit_layout = QHBoxLayout()
        edit_layout.addWidget(self.edit)
        edit_layout.addWidget(self.help)
        layout = QVBoxLayout()
        layout.addLayout(edit_layout)
        layout.addWidget(self.list)
        self.setLayout(layout)

        # Signals
        self.rejected.connect(self.restore_initial_state)
        self.filter.sig_up_key_pressed.connect(self.previous_row)
        self.filter.sig_down_key_pressed.connect(self.next_row)
        self.edit.returnPressed.connect(self.accept)
        self.edit.textChanged.connect(self.setup)
        self.list.itemSelectionChanged.connect(self.item_selection_changed)
        self.list.clicked.connect(self.edit.setFocus)

        # Setup
        self.save_initial_state()
        self.set_dialog_position()
        self.setup()

class FileSwitcher(QDialog):
    """A Sublime-like file switcher."""
    sig_goto_file = Signal(int)
    sig_close_file = Signal(int)

    # Constants that define the mode in which the list widget is working
    # FILE_MODE is for a list of files, SYMBOL_MODE if for a list of symbols
    # in a given file when using the '@' symbol.
    FILE_MODE, SYMBOL_MODE = [1, 2]

    def __init__(self, parent, tabs, data):
        QDialog.__init__(self, parent)

        # Variables
        self.tabs = tabs                  # Editor stack tabs
        self.data = data                  # Editor data
        self.mode = self.FILE_MODE        # By default start in this mode
        self.initial_cursors = None       # {fullpath: QCursor}
        self.initial_path = None          # Fullpath of initial active editor
        self.initial_editor = None        # Initial active editor
        self.line_number = None           # Selected line number in filer

        help_text = _("Press <b>Enter</b> to switch files or <b>Esc</b> to "
                      "cancel.<br><br>Type to filter filenames.<br><br>"
                      "Use <b>:number</b> to go to a line, e.g. "
                      "<b><code>main:42</code></b><br>"
                      "Use <b>@symbol_text</b> to go to a symbol, e.g. "
                      "<b><code>@init</code></b>"
                      "<br><br> Press <b>Ctrl+W</b> to close current tab.<br>")

        # Either allow searching for a line number or a symbol but not both
        regex = QRegExp("([A-Za-z0-9_]{0,100}@[A-Za-z0-9_]{0,100})|" +
                        "([A-Za-z]{0,100}:{0,1}[0-9]{0,100})")

        # Widgets
        self.edit = QLineEdit(self)
        self.help = HelperToolButton()
        self.list = QListWidget(self)
        self.filter = KeyPressFilter()
        regex_validator = QRegExpValidator(regex, self.edit)

        # Widgets setup
        self.setWindowFlags(Qt.Popup | Qt.FramelessWindowHint)
        self.setWindowOpacity(0.95)
        self.edit.installEventFilter(self.filter)
        self.edit.setValidator(regex_validator)
        self.help.setToolTip(help_text)
        self.list.setItemDelegate(HTMLDelegate(self))

        # Layout
        edit_layout = QHBoxLayout()
        edit_layout.addWidget(self.edit)
        edit_layout.addWidget(self.help)
        layout = QVBoxLayout()
        layout.addLayout(edit_layout)
        layout.addWidget(self.list)
        self.setLayout(layout)

        # Signals
        self.rejected.connect(self.restore_initial_state)
        self.filter.sig_up_key_pressed.connect(self.previous_row)
        self.filter.sig_down_key_pressed.connect(self.next_row)
        self.edit.returnPressed.connect(self.accept)
        self.edit.textChanged.connect(self.setup)
        self.list.itemSelectionChanged.connect(self.item_selection_changed)
        self.list.clicked.connect(self.edit.setFocus)

        # Setup
        self.save_initial_state()
        self.set_dialog_position()
        self.setup()

    # --- Properties
    @property
    def editors(self):
        return [self.tabs.widget(index) for index in range(self.tabs.count())]

    @property
    def line_count(self):
        return [editor.get_line_count() for editor in self.editors]

    @property
    def save_status(self):
        return [getattr(td, 'newly_created', False) for td in self.data]

    @property
    def paths(self):
        return [getattr(td, 'filename', None) for td in self.data]

    @property
    def filenames(self):
        return [self.tabs.tabText(index) for index in range(self.tabs.count())]

    @property
    def current_path(self):
        return self.paths_by_editor[self.get_editor()]

    @property
    def paths_by_editor(self):
        return dict(zip(self.editors, self.paths))
#.........这里部分代码省略.........

class ConfigDialog(QDialog):
    """Spyder configuration ('Preferences') dialog box"""
    
    # Signals
    check_settings = Signal()
    size_change = Signal(QSize)
    
    def __init__(self, parent=None):
        QDialog.__init__(self, parent)

        self.main = parent

        # Widgets
        self.pages_widget = QStackedWidget()
        self.contents_widget = QListWidget()
        self.button_reset = QPushButton(_('Reset to defaults'))

        bbox = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Apply |
                                QDialogButtonBox.Cancel)
        self.apply_btn = bbox.button(QDialogButtonBox.Apply)

        # Widgets setup
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)
        self.setWindowTitle(_('Preferences'))
        self.setWindowIcon(ima.icon('configure'))
        self.contents_widget.setMovement(QListView.Static)
        self.contents_widget.setSpacing(1)
        self.contents_widget.setCurrentRow(0)

        # Layout
        hsplitter = QSplitter()
        hsplitter.addWidget(self.contents_widget)
        hsplitter.addWidget(self.pages_widget)

        btnlayout = QHBoxLayout()
        btnlayout.addWidget(self.button_reset)
        btnlayout.addStretch(1)
        btnlayout.addWidget(bbox)

        vlayout = QVBoxLayout()
        vlayout.addWidget(hsplitter)
        vlayout.addLayout(btnlayout)

        self.setLayout(vlayout)

        # Signals and slots
        self.button_reset.clicked.connect(self.main.reset_spyder)
        self.pages_widget.currentChanged.connect(self.current_page_changed)
        self.contents_widget.currentRowChanged.connect(
                                             self.pages_widget.setCurrentIndex)
        bbox.accepted.connect(self.accept)
        bbox.rejected.connect(self.reject)
        bbox.clicked.connect(self.button_clicked)

        # Ensures that the config is present on spyder first run
        CONF.set('main', 'interface_language', load_lang_conf())

    def get_current_index(self):
        """Return current page index"""
        return self.contents_widget.currentRow()
        
    def set_current_index(self, index):
        """Set current page index"""
        self.contents_widget.setCurrentRow(index)
        
    def get_page(self, index=None):
        """Return page widget"""
        if index is None:
            widget = self.pages_widget.currentWidget()
        else:
            widget = self.pages_widget.widget(index)
        return widget.widget()
    
    @Slot()
    def accept(self):
        """Reimplement Qt method"""
        for index in range(self.pages_widget.count()):
            configpage = self.get_page(index)
            if not configpage.is_valid():
                return
            configpage.apply_changes()
        QDialog.accept(self)
        
    def button_clicked(self, button):
        if button is self.apply_btn:
            # Apply button was clicked
            configpage = self.get_page()
            if not configpage.is_valid():
                return
            configpage.apply_changes()
            
    def current_page_changed(self, index):
        widget = self.get_page(index)
        self.apply_btn.setVisible(widget.apply_callback is not None)
        self.apply_btn.setEnabled(widget.is_modified)
        
#.........这里部分代码省略.........

class PathManager(QDialog):
    def __init__(self, parent=None, pathlist=None, ro_pathlist=None, sync=True):
        QDialog.__init__(self, parent)
        
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)
        
        assert isinstance(pathlist, list)
        self.pathlist = pathlist
        if ro_pathlist is None:
            ro_pathlist = []
        self.ro_pathlist = ro_pathlist
        
        self.last_path = getcwd()
        
        self.setWindowTitle(_("PYTHONPATH manager"))
        self.setWindowIcon(get_icon('pythonpath.png'))
        self.resize(500, 300)
        
        self.selection_widgets = []
        
        layout = QVBoxLayout()
        self.setLayout(layout)
        
        top_layout = QHBoxLayout()
        layout.addLayout(top_layout)
        self.toolbar_widgets1 = self.setup_top_toolbar(top_layout)

        self.listwidget = QListWidget(self)
        self.connect(self.listwidget, SIGNAL("currentRowChanged(int)"),
                     self.refresh)
        layout.addWidget(self.listwidget)

        bottom_layout = QHBoxLayout()
        layout.addLayout(bottom_layout)
        self.sync_button = None
        self.toolbar_widgets2 = self.setup_bottom_toolbar(bottom_layout, sync)        
        
        # Buttons configuration
        bbox = QDialogButtonBox(QDialogButtonBox.Close)
        self.connect(bbox, SIGNAL("rejected()"), SLOT("reject()"))
        bottom_layout.addWidget(bbox)
        
        self.update_list()
        self.refresh()
        
    def _add_widgets_to_layout(self, layout, widgets):
        layout.setAlignment(Qt.AlignLeft)
        for widget in widgets:
            layout.addWidget(widget)
        
    def setup_top_toolbar(self, layout):
        toolbar = []
        movetop_button = create_toolbutton(self,
                                    text=_("Move to top"),
                                    icon=get_icon('2uparrow.png'),
                                    triggered=lambda: self.move_to(absolute=0),
                                    text_beside_icon=True)
        toolbar.append(movetop_button)
        moveup_button = create_toolbutton(self,
                                    text=_("Move up"),
                                    icon=get_icon('1uparrow.png'),
                                    triggered=lambda: self.move_to(relative=-1),
                                    text_beside_icon=True)
        toolbar.append(moveup_button)
        movedown_button = create_toolbutton(self,
                                    text=_("Move down"),
                                    icon=get_icon('1downarrow.png'),
                                    triggered=lambda: self.move_to(relative=1),
                                    text_beside_icon=True)
        toolbar.append(movedown_button)
        movebottom_button = create_toolbutton(self,
                                    text=_("Move to bottom"),
                                    icon=get_icon('2downarrow.png'),
                                    triggered=lambda: self.move_to(absolute=1),
                                    text_beside_icon=True)
        toolbar.append(movebottom_button)
        self.selection_widgets.extend(toolbar)
        self._add_widgets_to_layout(layout, toolbar)
        return toolbar
    
    def setup_bottom_toolbar(self, layout, sync=True):
        toolbar = []
        add_button = create_toolbutton(self, text=_("Add path"),
                                       icon=get_icon('edit_add.png'),
                                       triggered=self.add_path,
                                       text_beside_icon=True)
        toolbar.append(add_button)
        remove_button = create_toolbutton(self, text=_("Remove path"),
                                          icon=get_icon('edit_remove.png'),
                                          triggered=self.remove_path,
                                          text_beside_icon=True)
        toolbar.append(remove_button)
        self.selection_widgets.append(remove_button)
        self._add_widgets_to_layout(layout, toolbar)
        layout.addStretch(1)
        if os.name == 'nt' and sync:
#.........这里部分代码省略.........

class ConfigDialog(QDialog):
    """Spyder configuration ('Preferences') dialog box"""
    def __init__(self, parent=None):
        QDialog.__init__(self, parent)
        
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)

        self.contents_widget = QListWidget()
        self.contents_widget.setMovement(QListView.Static)
        self.contents_widget.setSpacing(1)

        bbox = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Apply
                                |QDialogButtonBox.Cancel)
        self.apply_btn = bbox.button(QDialogButtonBox.Apply)
        self.connect(bbox, SIGNAL("accepted()"), SLOT("accept()"))
        self.connect(bbox, SIGNAL("rejected()"), SLOT("reject()"))
        self.connect(bbox, SIGNAL("clicked(QAbstractButton*)"),
                     self.button_clicked)

        self.pages_widget = QStackedWidget()
        self.connect(self.pages_widget, SIGNAL("currentChanged(int)"),
                     self.current_page_changed)

        self.connect(self.contents_widget, SIGNAL("currentRowChanged(int)"),
                     self.pages_widget.setCurrentIndex)
        self.contents_widget.setCurrentRow(0)

        hsplitter = QSplitter()
        hsplitter.addWidget(self.contents_widget)
        hsplitter.addWidget(self.pages_widget)

        btnlayout = QHBoxLayout()
        btnlayout.addStretch(1)
        btnlayout.addWidget(bbox)

        vlayout = QVBoxLayout()
        vlayout.addWidget(hsplitter)
        vlayout.addLayout(btnlayout)

        self.setLayout(vlayout)

        self.setWindowTitle(_("Preferences"))
        self.setWindowIcon(get_icon("configure.png"))
        
    def get_current_index(self):
        """Return current page index"""
        return self.contents_widget.currentRow()
        
    def set_current_index(self, index):
        """Set current page index"""
        self.contents_widget.setCurrentRow(index)
        
    def get_page(self, index=None):
        """Return page widget"""
        if index is None:
            widget = self.pages_widget.currentWidget()
        else:
            widget = self.pages_widget.widget(index)
        return widget.widget()
        
    def accept(self):
        """Reimplement Qt method"""
        for index in range(self.pages_widget.count()):
            configpage = self.get_page(index)
            if not configpage.is_valid():
                return
            configpage.apply_changes()
        QDialog.accept(self)
        
    def button_clicked(self, button):
        if button is self.apply_btn:
            # Apply button was clicked
            configpage = self.get_page()
            if not configpage.is_valid():
                return
            configpage.apply_changes()
            
    def current_page_changed(self, index):
        widget = self.get_page(index)
        self.apply_btn.setVisible(widget.apply_callback is not None)
        self.apply_btn.setEnabled(widget.is_modified)
        
    def add_page(self, widget):
        self.connect(self, SIGNAL('check_settings()'), widget.check_settings)
        self.connect(widget, SIGNAL('show_this_page()'),
                     lambda row=self.contents_widget.count():
                     self.contents_widget.setCurrentRow(row))
        self.connect(widget, SIGNAL("apply_button_enabled(bool)"),
                     self.apply_btn.setEnabled)
        scrollarea = QScrollArea(self)
        scrollarea.setWidgetResizable(True)
        scrollarea.setWidget(widget)
        self.pages_widget.addWidget(scrollarea)
        item = QListWidgetItem(self.contents_widget)
        item.setIcon(widget.get_icon())
        item.setText(widget.get_name())
#.........这里部分代码省略.........

    def __init__(self, parent, max_entries=100):
        """ Creates a very basic window with some text """
        """
        RATE_LAW_MESSAGE = \
            "The Plugins for Spyder consists out of three main classes: \n\n" \
            "1. HelloWorld\n\n" \
            "\tThe HelloWorld class inherits all its methods from\n" \
            "\tSpyderPluginMixin and the HelloWorldWidget and performs all\n" \
            "\tthe processing required by the GU. \n\n" \
            "2. HelloWorldConfigPage\n\n" \
            "\tThe HelloWorldConfig class inherits all its methods from\n" \
            "\tPluginConfigPage to create a configuration page that can be\n" \
            "\tfound under Tools -> Preferences\n\n" \
            "3. HelloWorldWidget\n\n" \
            "\tThe HelloWorldWidget class inherits all its methods from\n" \
            "\tQWidget to create the actual plugin GUI interface that \n" \
            "\tdisplays this message on screen\n\n"
        """
        #Testing access editor on plugin initialization
        
        
        RATE_LAW_MESSAGE = ""
        displaynamelist = []
        #displaylist = []
        infixlist = []
        desclist = []
        parameterstringlist = []
        xmldoc = minidom.parse('\\.spyder2\\ratelaw2_0_3.xml')
        #xmldoc = minidom.parse('%\\Downloads\\ratelaw2_0_3.xml')
        
        lawlistxml = xmldoc.getElementsByTagName('law')
        #i is the number of laws currently in the xml file
        i = 0
        for s in lawlistxml:
            #RATE_LAW_MESSAGE += s.getAttribute('displayName') + "\n"
            RATE_LAW_MESSAGE += s.getAttribute('display') + "\n"
            #displaynamelist[i] = s.getAttribute('displayName')
            #displaylist[i] = s.getAttribute('display')
            displaynamelist.append(s.getAttribute('displayName'))
            #displaylist.append(s.getAttribute('display'))
            infixlist.append(s.getAttribute('infixExpression'))
            desclist.append(s.getAttribute('description'))
            parameterlist = s.getElementsByTagName('listOfParameters')[0]
            #for p in parameterlist    
            parameters = parameterlist.getElementsByTagName('parameter')
            parameterstring = ""
            for param in parameters:
                parametername = param.attributes['name'].value
                parameterdesc = param.attributes['description'].value
                parameterstring = parameterstring + '\t' + parametername + ":" + '\t' + "  " + parameterdesc + "\n"
                #print('\t' + parametername + ":" + '\t' + parameterdesc)
            parameterstringlist.append(parameterstring)    
            i = i + 1
            
        
        QWidget.__init__(self, parent)
        
        self.setWindowTitle("Rate Law Library")
        
        self.output = None
        self.error_output = None
        
        self._last_wdir = None
        self._last_args = None
        self._last_pythonpath = None
        
        self.textlabel = QLabel(RATE_LAW_MESSAGE)        

        self.lawlist = QListWidget()
        self.lawpage = QStackedWidget()
        #Adding displayName items to lawlist
        for j in range(i):
            item = QListWidgetItem(displaynamelist[j])
            self.lawlist.addItem(item)
            self.lawdetailpage = QWidget()
            # Page layout will become its own function
            setup_group = QGroupBox(displaynamelist[j])
            infixmod = infixlist[j].replace("___"," ")
            setup_label = QLabel(infixmod)
            setup_label.setWordWrap(True)
            
            desc_group = QGroupBox("Description")
            desc_label = QLabel(desclist[j])
            desc_label.setWordWrap(True)
            param_label = QLabel(parameterstringlist[j])
            param_label.setWordWrap(True)

        # Warning: do not try to regroup the following QLabel contents with 
        # widgets above -- this string was isolated here in a single QLabel
        # on purpose: to fix Issue 863
            setup_layout = QVBoxLayout()
            setup_layout.addWidget(setup_label)
            setup_group.setLayout(setup_layout)
            
            desc_layout = QVBoxLayout()
            desc_layout.addWidget(desc_label)
            desc_layout.addWidget(param_label)
            desc_group.setLayout(desc_layout)

            vlayout = QVBoxLayout()
#.........这里部分代码省略.........

 def __init__(self, parent, max_entries=100):
     
     "Initialize Various list objects before assignment"
     displaylist = []
     displaynamelist = []
     infixmod = []
     infixlist = []
     desclist = []
     
     parameternamelist = []
     parameterdesclist = []
     parameterstringlist = []
     paramcountlist = []
     
     
     
     buttonlist  = []
     xmldoc = minidom.parse('C:\\Users\\Jayit\\.spyder2\\ratelaw2_0_3.xml')
     #xmldoc = minidom.parse('%\\Downloads\\ratelaw2_0_3.xml')
     
     lawlistxml = xmldoc.getElementsByTagName('law')
     
     o = 0
     for s in lawlistxml:
         o = o + 1
     
     parameternamelistlist = [0 for x in range(o)]
     parameterdesclistlist = [0 for x in range(o)]
     
     """i is the number of laws currently in the xml file"""
     i = 0
     
     """
     Parsing xml: Acquiring rate law name, description, and list of parameter information
     """
     for s in lawlistxml:
         #RATE_LAW_MESSAGE += s.getAttribute('displayName') + "\n"
         """Gets Latec Expression"""
         displaylist.append(s.getAttribute('display'))
         
         """Gets Rate-Law Name"""
         displaynamelist.append(s.getAttribute('displayName'))
         
         """"Gets Raw Rate-Law expression"""
         infixlist.append(s.getAttribute('infixExpression'))
         
         """Gets description statement"""
         desclist.append(s.getAttribute('description'))
         
         """Gets listOfParameters Object"""
         parameterlist = s.getElementsByTagName('listOfParameters')[0]
         
         """Gets a list of parameters within ListOfParameters object"""    
         parameters = parameterlist.getElementsByTagName('parameter')
         
         for param in parameters:
             parameternamelist.append(param.attributes['name'].value)
             #print(param.attributes['name'].value)
             parameterdesclist.append(param.attributes['description'].value)  
         
         parameternamelistlist[i] = parameternamelist
         #print("break")
         parameterdesclistlist[i] = parameterdesclist
         
         parameternamelist = []
         parameterdesclist = []
         i = i + 1
     
     SLElistlist = [ 0 for x in range(i)]
     PLElistlist = [ 0 for x in range(i)]
     ILElistlist = [ 0 for x in range(i)]
     paramLElistlist = [ 0 for x in range(i)]
     numlistlist = [ 0 for x in range(i)]
     
     QWidget.__init__(self, parent)
     
     self.setWindowTitle("Rate Law Library")
     
     self.output = None
     self.error_output = None
     self._last_wdir = None
     self._last_args = None
     self._last_pythonpath = None
     
     #self.textlabel = QLabel(RATE_LAW_MESSAGE)
     
     self.lawlist = QListWidget()
     self.lawpage = QStackedWidget()
     index = 0
     for j in range(i):            
         item = QListWidgetItem(displaynamelist[j])
         self.lawlist.addItem(item)
         self.lawdetailpage = QWidget()
         setup_group = QGroupBox(displaynamelist[j])
         infixmod.append(infixlist[j].replace("___"," "))      
         setup_label = QLabel(infixmod[j])
         setup_label.setWordWrap(True)
         
         desc_group = QGroupBox("Description")
         desc_label = QLabel(desclist[j])
#.........这里部分代码省略.........