Question

我有一个wxpython listctrl，它包含4列[A，B，C，D]。用户从listctrl中选择任何一行。现在我在我的gui中有一个按钮，所以当我点击我想从该选定行打印D列的值。例如，让用户选择此行：
[PYTHON，JAVA，MATLAB，RUBY]
现在，如果用户点击按钮，它应该输出：RUBY
我以这种方式约束THE BUTTON

self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnPlot, self.list) 

self.list.Append((j[0],j[1],j[2],j[3]))     #values are inserted in the listctrl

OnPlot事件我定义为：def OnPlot(self, event): click = event.GetText()

它不起作用。我怎么能做到这一点？

Answer 1

事件将从listctrl传递所选项目的索引使用索引获取listctrl中的项目和列，在本例中为3 获取专栏文本即：

def on_plot(self, event):
    ind = event.GetIndex()
    item = self.list_ctrl.GetItem(ind,3)
    print item.GetText()

这假设您已经像这样绑定了listctrl：

self.list_ctrl.Bind(wx.EVT_LIST_ITEM_SELECTED, self.on_plot, self.list_ctrl)

编辑：
关于您的评论和对问题标题的编辑。你不能将任意事件绑定到某个东西。按钮具有一组已定义的事件，listctrl也是如此，并且twain不会满足。解决问题的方法是将按钮绑定到按钮事件。

plot_button.Bind(wx.EVT_BUTTON, self.on_plot)

然后像这样定义on_plot：

def on_plot(self, event):
    ind = self.list_ctrl.GetFirstSelected()
    if ind >=0:
        item = self.list_ctrl.GetItem(ind,3)
        print item.GetText()

正如您将看到它达到相同的最终结果但是它很大但是，您已经不得不单击listctrl来选择项目。在这种情况下，您可以使用第一种方法获得相同的结果，而无需首先定义按钮，并且使用此方法您现在必须检查以防未选择任何内容（ind不能为-1））。

Answer 2

在我看来，列表控件很难处理。基本上你需要获得你所在的行并硬编码你感兴趣的列。像这样的东西应该让你开始：

import wx


class MyForm(wx.Frame):

    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "List Control Tutorial")

        # Add a panel so it looks the correct on all platforms
        panel = wx.Panel(self, wx.ID_ANY)
        self.index = 0
        self.current_selection = None

        self.list_ctrl = wx.ListCtrl(panel, size=(-1,100),
                                     style=wx.LC_REPORT
                         |wx.BORDER_SUNKEN
                         )
        self.list_ctrl.InsertColumn(0, 'Subject')
        self.list_ctrl.InsertColumn(1, 'Due')
        self.list_ctrl.InsertColumn(2, 'Location', width=125)
        self.list_ctrl.Bind(wx.EVT_LIST_ITEM_SELECTED, self.on_item_selected)

        btn = wx.Button(panel, label="Add Line")
        btn.Bind(wx.EVT_BUTTON, self.add_line)

        data_getter_btn = wx.Button(panel, label='Get all data')
        data_getter_btn.Bind(wx.EVT_BUTTON, self.on_get_data)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
        sizer.Add(btn, 0, wx.ALL|wx.CENTER, 5)
        sizer.Add(data_getter_btn, 0, wx.ALL|wx.CENTER, 5)
        panel.SetSizer(sizer)

    def add_line(self, event):
        line = "Line %s" % self.index
        self.list_ctrl.InsertStringItem(self.index, line)
        self.list_ctrl.SetStringItem(self.index, 1, "01/19/2010")
        self.list_ctrl.SetStringItem(self.index, 2, "USA")
        self.index += 1

    def on_item_selected(self, event):
        self.current_selection = event.m_itemIndex

    def on_get_data(self, event):
        if self.current_selection:
            print self.current_selection
            item = self.list_ctrl.GetItem(itemId=self.current_selection, col=2)
            print item.GetText()

#----------------------------------------------------------------------
# Run the program
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyForm()
    frame.Show()
    app.MainLoop()

上面的代码将打印出当前选择（行号）和第3列的文本。如果要打印出所有行和列的文本，则可以执行以下操作：

import wx

########################################################################
class MyForm(wx.Frame):

    #----------------------------------------------------------------------
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "List Control Tutorial")

        # Add a panel so it looks the correct on all platforms
        panel = wx.Panel(self, wx.ID_ANY)
        self.index = 0

        self.list_ctrl = wx.ListCtrl(panel, size=(-1,100),
                         style=wx.LC_REPORT
                         |wx.BORDER_SUNKEN
                         )
        self.list_ctrl.InsertColumn(0, 'Subject')
        self.list_ctrl.InsertColumn(1, 'Due')
        self.list_ctrl.InsertColumn(2, 'Location', width=125)

        btn = wx.Button(panel, label="Add Line")
        btn2 = wx.Button(panel, label="Get Data")
        btn.Bind(wx.EVT_BUTTON, self.add_line)
        btn2.Bind(wx.EVT_BUTTON, self.get_data)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
        sizer.Add(btn, 0, wx.ALL|wx.CENTER, 5)
        sizer.Add(btn2, 0, wx.ALL|wx.CENTER, 5)
        panel.SetSizer(sizer)

    #----------------------------------------------------------------------
    def add_line(self, event):
        line = "Line %s" % self.index
        self.list_ctrl.InsertStringItem(self.index, line)
        self.list_ctrl.SetStringItem(self.index, 1, "01/19/2010")
        self.list_ctrl.SetStringItem(self.index, 2, "USA")
        self.index += 1

    #----------------------------------------------------------------------
    def get_data(self, event):
        """"""
        count = self.list_ctrl.GetItemCount()
        cols = self.list_ctrl.GetColumnCount()
        for row in range(count):
            for col in range(cols):
                item = self.list_ctrl.GetItem(itemId=row, col=col)
                print item.GetText()

#----------------------------------------------------------------------
# Run the program
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyForm()
    frame.Show()
    app.MainLoop()

实现此类事情的更简单方法是将对象与每行关联起来。这是一个例子：

import wx

########################################################################
class Car(object):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, make, model, year, color="Blue"):
        """Constructor"""
        self.make = make
        self.model = model
        self.year = year
        self.color = color


########################################################################
class MyPanel(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent)

        rows = [Car("Ford", "Taurus", "1996"),
                Car("Nissan", "370Z", "2010"),
                Car("Porche", "911", "2009", "Red")
                ]

        self.list_ctrl = wx.ListCtrl(self, size=(-1,100),
                                style=wx.LC_REPORT
                                |wx.BORDER_SUNKEN
                                )
        self.list_ctrl.Bind(wx.EVT_LIST_ITEM_SELECTED, self.onItemSelected)
        self.list_ctrl.InsertColumn(0, "Make")
        self.list_ctrl.InsertColumn(1, "Model")
        self.list_ctrl.InsertColumn(2, "Year")
        self.list_ctrl.InsertColumn(3, "Color")

        index = 0
        self.myRowDict = {}
        for row in rows:
            self.list_ctrl.InsertStringItem(index, row.make)
            self.list_ctrl.SetStringItem(index, 1, row.model)
            self.list_ctrl.SetStringItem(index, 2, row.year)
            self.list_ctrl.SetStringItem(index, 3, row.color)
            self.myRowDict[index] = row
            index += 1

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)

    #----------------------------------------------------------------------
    def onItemSelected(self, event):
        """"""
        currentItem = event.m_itemIndex
        car = self.myRowDict[currentItem]
        print car.make
        print car.model
        print car.color
        print car.year

########################################################################
class MyFrame(wx.Frame):
    """"""

    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, wx.ID_ANY, "List Control Tutorial")
        panel = MyPanel(self)
        self.Show()

#----------------------------------------------------------------------
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame()
    app.MainLoop()

坦率地说，我真的不再使用ListCtrl了。我更喜欢使用ObjectListView，因为它似乎更容易使用，并提供了更多的开箱即用功能。以下是几个链接：

如何将wxpython listctrl与onclick按钮事件绑定

2 个答案: