QTableWidg的QGis插件故障

Question

Im目前正在开发一个QGis插件（我使用pluginbuilder创建了一个示例），这个插件应该显示QTableWidget中选定向量层的特性。我有两份文件仙人掌.py（主程序）和“仙人掌”对话框_基准.py（QtCreator上设计的Ui文件）。 问题是：在主程序中，我不能在QTableWidget上设置项目，而且我不知道为什么（，我对QGis/Python编程非常陌生，我对self/iface/ui实例非常困惑。救命啊！在

cactus.py

class Cactus:
def __init__(self, iface):
    self.iface = iface
    self.tablewidget = QTableWidget()
    # initialize plugin directory
    self.plugin_dir = os.path.dirname(__file__)
    # initialize locale
    locale = QSettings().value('locale/userLocale')[0:2]
    locale_path = os.path.join(
        self.plugin_dir,
        'i18n',
        'Cactus_{}.qm'.format(locale))

    if os.path.exists(locale_path):
        self.translator = QTranslator()
        self.translator.load(locale_path)

        if qVersion() > '4.3.3':
            QCoreApplication.installTranslator(self.translator)

    # Create the dialog (after translation) and keep reference
    self.dlg = Ui_cactus_dialog_base()
    self.dlg.show_record = self.show_record
    self.dlg.eje_tablewidget = self.tablewidget
    # Declare instance attributes
    self.actions = []
    self.menu = self.tr(u'&Cactus')
    # TODO: We are going to let the user set this up in a future iteration
    self.toolbar = self.iface.addToolBar(u'Cactus')
    self.toolbar.setObjectName(u'Cactus')

# noinspection PyMethodMayBeStatic
def tr(self, message):

    return QCoreApplication.translate('Cactus', message)


def add_action(
    self,
    icon_path,
    text,
    callback,
    enabled_flag=True,
    add_to_menu=True,
    add_to_toolbar=True,
    status_tip=None,
    whats_this=None,
    parent=None):


    icon = QIcon(icon_path)
    action = QAction(icon, text, parent)
    action.triggered.connect(callback)
    action.setEnabled(enabled_flag)

    if status_tip is not None:
        action.setStatusTip(status_tip)

    if whats_this is not None:
        action.setWhatsThis(whats_this)

    if add_to_toolbar:
        self.toolbar.addAction(action)

    if add_to_menu:
        self.iface.addPluginToMenu(
            self.menu,
            action)

    self.actions.append(action)

    return action

def initGui(self):
    """Create the menu entries and toolbar icons inside the QGIS GUI."""

    icon_path = ':/plugins/Cactus/icon.png'
    self.add_action(
        icon_path,
        text=self.tr(u'Cactus - Creacion manzanas a partir de ejes'),
        callback=self.run,
        parent=self.iface.mainWindow())


def unload(self):
    """Removes the plugin menu item and icon from QGIS GUI."""
    for action in self.actions:
        self.iface.removePluginMenu(
            self.tr(u'&Cactus'),
            action)
        self.iface.removeToolBarIcon(action)
    # remove the toolbar
    del self.toolbar


def run(self):

    self.dlg.setupUi(self.dlg)

    """Run method that performs all the real work"""

    # show the dialog
    self.dlg.show()
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result:
        # Do something useful here - delete the line containing pass and
        # substitute with your code.
        pass


@pyqtSlot()
def show_record(self):
    layer = self.iface.activeLayer()   
    ejes = layer.selectedFeatures()
    print len(ejes)
    i = 0
    j = 0
    for eje in ejes:
        i = i + 1
        for column in eje:
            item = QTableWidgetItem('ejee_id')
            self.tablewidget.setItem(i, j, item)
            print item
            j = j + 1

UI_cactus_dialog_base.py

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Answer 1

有几种方法可以做你想做的事。在目前的代码中，有一件事是缺失的。在

需要告诉QtableWidget何时使用setRowCount()方法添加行。在

你需要先加一行。柱子也是一样。在

在开始“for循环”之前，需要将setRowCount()设置为零，以便“从表中删除数据”，因为QTableWidget就是这样工作的。在

您还可以通过使用表的rowCount和columnCount使其更具动态性，或者使用eje.attribute["column_name"]在标准列位置获取要添加的特定列。例如，你已经知道

eje.attribue["user_name"]

是第三列，因此不需要对列执行嵌套循环，而是可以->

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