Question

为gtk中的简单文件浏览器编写剪切/复制/粘贴功能。每个剪切/复制按钮/粘贴点击都会发出越来越多的信号。以下是该程序的一部分，用于处理浏览器的剪切/复制/粘贴功能：

def __init__(self):
    '''
    some code
    '''

    iconView1.connect("selection-changed", self.on_selection_changed_1, copyButton1, copyButton2, cutButton1, cutButton2, pasteButton1, pasteButton2, deleteButton1, store1, store2)
    iconView2.connect("selection-changed", self.on_selection_changed_2, copyButton1, copyButton2, cutButton1, cutButton2, pasteButton1, pasteButton2, deleteButton2, store1, store2)

def on_selection_changed_1(self, iconView1, copyButton1, copyButton2, cutButton1, cutButton2, pasteButton1, pasteButton2, deleteButton1, store1, store2) :

    selectedIcon = iconView1.get_selected_items()
    if selectedIcon :

        model = iconView1.get_model()
        path = model[selectedIcon[0]][COL_PATH]

        self.action_directory_1 = self.current_directory_1+os.path.sep+path

        copyButton1.set_sensitive(True)
        cutButton1.set_sensitive(True)
        deleteButton1.set_sensitive(True)

        copyButton1.connect("clicked",self.copy_pressed, cutButton1, cutButton2, pasteButton1, pasteButton2, 1, store1, store2)
        cutButton1.connect("clicked",self.cut_pressed, copyButton1, copyButton2, pasteButton1, pasteButton2, 1, store1, store2)
        deleteButton1.connect("clicked",self.delete_pressed, 1, store1, store2)


    else :

        copyButton1.set_sensitive(False)
        cutButton1.set_sensitive(False)
        deleteButton1.set_sensitive(False)


def on_selection_changed_2(self, iconView2, copyButton1, copyButton2, cutButton1, cutButton2, pasteButton1, pasteButton2, deleteButton2, store1, store2) :

    selectedIcon = iconView2.get_selected_items()
    if selectedIcon :


        model = iconView2.get_model()
        path = model[selectedIcon[0]][COL_PATH]
        self.action_directory_2 = self.current_directory_2+os.path.sep+path

        copyButton2.set_sensitive(True)
        cutButton2.set_sensitive(True)
        pasteButton2.set_sensitive(True)
        deleteButton2.set_sensitive(True)

        copyButton2.connect("clicked",self.copy_pressed, cutButton1, cutButton2, pasteButton1, pasteButton2, 2, store1, store2)            
        cutButton2.connect("clicked",self.cut_pressed, copyButton1, copyButton2, pasteButton1, pasteButton2, 2, store1, store2)
        deleteButton2.connect("clicked",self.delete_pressed, 2, store1, store2)



    else :

        copyButton2.set_sensitive(False)
        cutButton2.set_sensitive(False)
        pasteButton2.set_sensitive(False)
        deleteButton2.set_sensitive(False)

###############ACTION METHODS--CUT#################

def cut_pressed(self, widget, copyButton1, copyButton2, pasteButton1, pasteButton2, index, store1, store2):
    if index == 1:
        pasteButton2.set_sensitive(True)
        pasteButton2.connect("clicked", self.paste_pressed,"cut", 1, store1, store2)
        print " CUT BUTTON 1"
        print " ########################## "
        copyButton1.set_sensitive(False)
        widget.set_sensitive(False)

    else :
        pasteButton1.set_sensitive(True)
        pasteButton1.connect("clicked", self.paste_pressed,"cut", 2, store1, store2)
        print " CUT BUTTON 2"
        copyButton2.set_sensitive(False)
        widget.set_sensitive(False)

###############ACTION METHODS--COPY##################
def copy_pressed(self, widget, cutButton1, cutButton2, pasteButton1, pasteButton2, index, store1, store2):
    if index == 1:
        pasteButton2.set_sensitive(True)
        pasteButton2.connect("clicked", self.paste_pressed,"copy", 1, store1, store2)
        print " COPY BUTTON 1"
        cutButton1.set_sensitive(False)
        widget.set_sensitive(False)

    else :
        pasteButton1.set_sensitive(True)
        pasteButton1.connect("clicked", self.paste_pressed,"copy", 2, store1, store2)
        print " COPY BUTTON 2"
        cutButton2.set_sensitive(False)
        widget.set_sensitive(False)

##############ACTION METHODS--PASTE################

def paste_pressed(self, widget, action, index, store1, store2):
    if index == 1:
        if action == "cut" :
           print " cut selected 1" + " ACTION DIRECTORY : " +self.action_directory_1
           print " ########################## "

           widget.set_sensitive(False)


        else :
           print " copy selected 1" + " ACTION DIRECTORY : " +self.action_directory_1
           print " ########################## "
           widget.set_sensitive(False)

    else :
        if action == "cut" :
           print " cut selected 2" + " ACTION DIRECTORY : " +self.action_directory_1
           print " ########################## "
           widget.set_sensitive(False)

        else :
           print " copy selected 2" + " ACTION DIRECTORY : " +self.action_directory_1
           print " ########################## "
           widget.set_sensitive(False)

以下是终端收到的输出：

vineet @ vineet：〜/ Documents / Project $ python draft7.py

 CUT BUTTON 1 // FIRST CLICK
 ########################## 
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/EFI
 ########################## 
 CUT BUTTON 1 // SECOND CLICK
 ########################## 
 CUT BUTTON 1
 ########################## 
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/Media_File
 ########################## 
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/Media_File
 ########################## 
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/Media_File
 ########################## 
 COPY BUTTON 1  // THIRD CLICK
 COPY BUTTON 1
 COPY BUTTON 1
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/pics
 ########################## 
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/pics
 ########################## 
 cut selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/pics
 ########################## 
 copy selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/pics
 ########################## 
 copy selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/pics
 ########################## 
 copy selected 1 ACTION DIRECTORY : /media/vineet/MYLINUXLIVE/pics
 ##########################

正如您在终端输出中看到的，在第一次点击后每次点击都会发出增加的号码。如果每次点击我获得1个发射信号？（或者在这种情况下，每次点击一次CUT/COPY BUTTON 1/2' and an associated切割/复制选择1 / 2`打印输出）

Answer 1

您在每次按键时都会连接新的信号处理程序，并且永远不会删除旧的处理程序。当信号触发时，将连接您连接的每个处理程序。

您应该在某些初始化代码中仅连接所有信号一次（然后在处理程序中决定是否是实际处理信号的好时机，如果您有不希望它处理的情况），或者你应该断开处理程序本身的处理程序，如果你不再希望它被调用。

单击即可发出多个按钮单击信号

1 个答案: