行号和语法突出显示不适用于不同的选项卡

Question

我正在尝试解决 <select name="cat"> <c:forEach var="attCat" items="${attCat}"> <c:choose> <c:when test="${attCat.catId==fun.GetCatId(date, empList.empId)}"> <option value="${attCat.catId}" selected="selected" disabled="disabled" >${attCat.category}</option> </c:when> <c:otherwise> <option value="${attCat.catId}">${attCat.category}</option> </c:otherwise> </c:choose> </c:forEach> </select> 中line numbers无效的问题。问题在于，当我创建新标签时，其他标签的multiple tabs不起作用，但line numbers会起作用。同样适用于line numbers for the current tab。

我认为问题在于在创建新标签时使用相同的变量，但我不知道如何解决此问题，我不确定这是否真的是问题。我还在考虑重新定义文本框，以及每次单击选项卡时与其关联的绑定。

以下是我的代码：

syntax highlighting

Answer 1

是的，正如您所观察到的，问题是因为您始终将linenumbers更改为最新标签的亚麻布，因此对于旧标签，即使调用_on_change()，也会调用仅在新行号上重绘，而不是在旧行号上重绘。

我认为推进应用程序的正确方法是进行另一个抽象级别，其中Tab本身就是一个完整的对象，每个选项卡应该是一个不同的对象，并且应该保存亚麻/文本本身。

示例 -

import tkinter as tk
import tkinter.ttk as ttk

class TextLineNumbers(tk.Canvas):
    def __init__(self, *args, **kwargs):
        tk.Canvas.__init__(self, *args, **kwargs)
        self.textwidget = None

    def attach(self, text_widget):
        self.textwidget = text_widget

    def redraw(self, *args):
        '''redraw line numbers'''
        self.delete("all")

        i = self.textwidget.index("@0,0")
        while True:
            dline= self.textwidget.dlineinfo(i)
            if dline is None: break
            y = dline[1]
            linenum = str(i).split(".")[0]
            self.create_text(5,y,anchor="nw", text=linenum, font=("Courier", 9))
            i = self.textwidget.index("%s+1line" % i)

class CustomText(tk.Text): 
    def __init__(self, *args, **kwargs):
        tk.Text.__init__(self, *args, **kwargs)

        self.tk.eval('''
            proc widget_proxy {widget widget_command args} {

                # call the real tk widget command with the real args
                set result [uplevel [linsert $args 0 $widget_command]]

                # generate the event for certain types of commands
                if {([lindex $args 0] in {insert replace delete}) ||
                    ([lrange $args 0 2] == {mark set insert}) || 
                    ([lrange $args 0 1] == {xview moveto}) ||
                    ([lrange $args 0 1] == {xview scroll}) ||
                    ([lrange $args 0 1] == {yview moveto}) ||
                    ([lrange $args 0 1] == {yview scroll})} {

                    event generate  $widget <<Change>> -when tail
                }

                # return the result from the real widget command
                return $result
            }
            ''')
        self.tk.eval('''
            rename {widget} _{widget}
            interp alias {{}} ::{widget} {{}} widget_proxy {widget} _{widget}
        '''.format(widget=str(self)))

        self.comment = False

class Tab:
    def __init__(self, parent, filename):
        self.parent = parent
        self.filename = filename
        self.tab1 = ttk.Frame(parent)
        self.text = CustomText(self.tab1, bd=0, font=("Courier", 9))  

        self.vsb = tk.Scrollbar(self.tab1, orient=tk.VERTICAL)
        self.text.configure(yscrollcommand=self.vsb.set)
        self.vsb.configure(command=self.text.yview)

        self.linenumbers = TextLineNumbers(self.tab1, width=55)
        self.linenumbers.attach(self.text)

        self.vsb.pack(side=tk.RIGHT, fill=tk.Y)
        self.linenumbers.pack(side="left", fill="y")
        self.text.pack(side="right", fill="both", expand=True)

        parent.add(self.tab1, text=filename)

        self.text.bind("<<Change>>", self._on_change)
        self.text.bind("<Configure>", self._on_change)

    def _on_change(self, event):
        self.linenumbers.redraw()


class Window(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        self.fileName = "Untitled Document"
        self.content = ""
        self.previousContent = ""
        self.language = "Python"
        self.row = "0"
        self.column = "0"
        self.startCol = 0

        self.notebook = ttk.Notebook(self)
        self.tabs = []
        self.menubar()
        self.createtext()

    def createtext(self):
        self.notebook.pack(fill=tk.BOTH, expand=True)
        t = Tab(self.notebook, self.fileName)
        self.tabs.append(t)

    def addtab(self):
        t = Tab(self.notebook, self.fileName)
        self.tabs.append(t)

    def removetab(self):
        numberOfTabs = self.notebook.index("end")

        if numberOfTabs > 1:
            tabIndex = self.notebook.index(self.notebook.select())
            self.notebook.forget(tabIndex)
            del self.tabs[tabIndex]

    def menubar(self):
        self.menu = tk.Menu(self)
        self.master.config(menu=self.menu)

        self.fileMenu = tk.Menu(self.menu, font=("Courier", 9))
        self.fileMenu.add_command(label="New Window", command=self.addtab)
        self.fileMenu.add_command(label="Close Window", command=self.removetab)
        self.menu.add_cascade(label="File", menu=self.fileMenu)

if __name__ == "__main__":
    root = tk.Tk()
    root.title("Window")
    root.geometry("1024x600")
    window = Window(root).pack(side="top", fill="both", expand=True)
    root.mainloop()

我创建了一个新类Tab并将先前方法（如createtext）中的代码复制到其中，现在在创建新选项卡时，我们只需要实例化Tab类的对象。

部分工作代码，适用于您的情况 -

import tkinter as tk
import tkinter.filedialog
import traceback
import tkinter.ttk as ttk

from pygments import lex
from pygments.lexers import PythonLexer

import sys
import os

class TextLineNumbers(tk.Canvas):
    def __init__(self, *args, **kwargs):
        tk.Canvas.__init__(self, *args, **kwargs)
        self.textwidget = None

    def attach(self, text_widget):
        self.textwidget = text_widget

    def redraw(self, *args):
        '''redraw line numbers'''
        self.delete("all")

        i = self.textwidget.index("@0,0")
        while True:
            dline= self.textwidget.dlineinfo(i)
            if dline is None: break
            y = dline[1]
            linenum = str(i).split(".")[0]
            self.create_text(5,y,anchor="nw", text=linenum, font=("Courier", 9))
            i = self.textwidget.index("%s+1line" % i)

class CustomText(tk.Text): 
    def __init__(self, *args, **kwargs):
        tk.Text.__init__(self, *args, **kwargs)

        self.tk.eval('''
            proc widget_proxy {widget widget_command args} {

                # call the real tk widget command with the real args
                set result [uplevel [linsert $args 0 $widget_command]]

                # generate the event for certain types of commands
                if {([lindex $args 0] in {insert replace delete}) ||
                    ([lrange $args 0 2] == {mark set insert}) || 
                    ([lrange $args 0 1] == {xview moveto}) ||
                    ([lrange $args 0 1] == {xview scroll}) ||
                    ([lrange $args 0 1] == {yview moveto}) ||
                    ([lrange $args 0 1] == {yview scroll})} {

                    event generate  $widget <<Change>> -when tail
                }

                # return the result from the real widget command
                return $result
            }
            ''')
        self.tk.eval('''
            rename {widget} _{widget}
            interp alias {{}} ::{widget} {{}} widget_proxy {widget} _{widget}
        '''.format(widget=str(self)))

        self.comment = False

class Tab:
    def __init__(self, parent, filename, parentwindow):
        self.fileName = "Untitled Document"
        self.content = ""
        self.previousContent = ""
        self.parentwindow = parentwindow
        self.language = "Python"
        self.parent = parent
        self.filename = filename
        self.tab1 = ttk.Frame(parent)
        self.text = CustomText(self.tab1, bd=0, font=("Courier", 9))  

        self.vsb = tk.Scrollbar(self.tab1, orient=tk.VERTICAL)
        self.text.configure(yscrollcommand=self.vsb.set)
        self.vsb.configure(command=self.text.yview)

        self.linenumbers = TextLineNumbers(self.tab1, width=55)
        self.linenumbers.attach(self.text)

        self.vsb.pack(side=tk.RIGHT, fill=tk.Y)
        self.linenumbers.pack(side="left", fill="y")
        self.text.pack(side="right", fill="both", expand=True)

        parent.add(self.tab1, text=filename)
        self.bottomLabel()

        self.text.bind("<<Change>>", self._on_change)
        self.text.bind("<Configure>", self._on_change)
        self.text.bind("<KeyRelease>", self.keypress)
        self.text.bind("<Button-1>", self.keypress)

    def deafultHighlight(self, argument):
        self.content = self.text.get("1.0", tk.END)
        self.lines = self.content.split("\n")

        if (self.previousContent != self.content):
            self.text.mark_set("range_start", self.row + ".0")
            data = self.text.get(self.row + ".0", self.row + "." + str(len(self.lines[int(self.row) - 1])))

            for token, content in lex(data, PythonLexer()):
                self.text.mark_set("range_end", "range_start + %dc" % len(content))
                self.text.tag_add(str(token), "range_start", "range_end")
                self.text.mark_set("range_start", "range_end")

        self.previousContent = self.text.get("1.0", tk.END)

    def highlight(self, argument):
        self.content = self.text.get("1.0", tk.END)

        if (self.previousContent != self.content):
            self.text.mark_set("range_start", "1.0")
            data = self.text.get("1.0", self.text.index(tk.INSERT))

            for token, content in lex(data, PythonLexer()):
                self.text.mark_set("range_end", "range_start + %dc" % len(content))
                self.text.tag_add(str(token), "range_start", "range_end")
                self.text.mark_set("range_start", "range_end")

        self.previousContent = self.text.get("1.0", tk.END)

    def keypress(self, argument):
        self.updateBottomLabel()
        self.deafultHighlight("argument")

    def _on_change(self, event):
        self.linenumbers.redraw()

    def bottomLabel(self):
        self.positionAndLanguage = tk.Label(self.parentwindow, text=" Ln: 1, Col: 0, Lang: Plain", anchor=tk.W, bg="#E7E7E7", font=("Courier New", 8))
        self.positionAndLanguage.pack(fill=tk.X, side=tk.BOTTOM)

    def updateBottomLabel(self):
        self.row = self.text.index(tk.INSERT).split(".")[0]
        self.column = self.text.index(tk.INSERT).split(".")[1]
        self.positionAndLanguage["text"] = " Ln: {0}, Col: {1}, Lang: {2}".format(self.row, self.column, self.language)

class Arshi(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        self.fileName = "Untitled Document"
        self.content = ""
        self.previousContent = ""
        self.language = "Python"
        self.row = "0"
        self.column = "0"
        self.startCol = 0
        self.tabs = []
        self.notebook = ttk.Notebook(self)

        self.menubar()
        #self.bottomLabel()
        self.createtext()

    def deafultHighlight(self, argument):
        self.content = self.text.get("1.0", tk.END)
        self.lines = self.content.split("\n")

        if (self.previousContent != self.content):
            self.text.mark_set("range_start", self.row + ".0")
            data = self.text.get(self.row + ".0", self.row + "." + str(len(self.lines[int(self.row) - 1])))

            for token, content in lex(data, PythonLexer()):
                self.text.mark_set("range_end", "range_start + %dc" % len(content))
                self.text.tag_add(str(token), "range_start", "range_end")
                self.text.mark_set("range_start", "range_end")

        self.previousContent = self.text.get("1.0", tk.END)

    def highlight(self, argument):
        self.content = self.text.get("1.0", tk.END)

        if (self.previousContent != self.content):
            self.text.mark_set("range_start", "1.0")
            data = self.text.get("1.0", self.text.index(tk.INSERT))

            for token, content in lex(data, PythonLexer()):
                self.text.mark_set("range_end", "range_start + %dc" % len(content))
                self.text.tag_add(str(token), "range_start", "range_end")
                self.text.mark_set("range_start", "range_end")

        self.previousContent = self.text.get("1.0", tk.END)

    def keypress(self, argument):
        self.updateBottomLabel()
        self.deafultHighlight("argument")

    def configureTags(self, text):
        text.tag_configure("Token.Keyword", foreground="#CC7A00")
        text.tag_configure("Token.Keyword.Constant", foreground="#CC7A00")
        text.tag_configure("Token.Keyword.Declaration", foreground="#CC7A00")
        text.tag_configure("Token.Keyword.Namespace", foreground="#CC7A00")
        text.tag_configure("Token.Keyword.Pseudo", foreground="#CC7A00")
        text.tag_configure("Token.Keyword.Reserved", foreground="#CC7A00")
        text.tag_configure("Token.Keyword.Type", foreground="#CC7A00")

        text.tag_configure("Token.Name.Class", foreground="#003D99")
        text.tag_configure("Token.Name.Exception", foreground="#003D99")
        text.tag_configure("Token.Name.Function", foreground="#003D99")

        text.tag_configure("Token.Operator.Word", foreground="#CC7A00")

        text.tag_configure("Token.Comment", foreground="#B80000")

        text.tag_configure("Token.Literal.String", foreground="#248F24")

    def createtext(self):
        self.notebook.pack(fill=tk.BOTH, expand=True)
        t = Tab(self.notebook, self.fileName, self)
        self.tabs.append(t)

    def addtab(self):
        t = Tab(self.notebook, self.fileName, self)
        self.tabs.append(t)

    def removetab(self):
        numberOfTabs = self.notebook.index("end")

        if numberOfTabs > 1:
            tabIndex = self.notebook.index(self.notebook.select())
            self.notebook.forget(tabIndex)

    def run(self):
        pass

    def menubar(self):
        self.menu = tk.Menu(self)
        self.master.config(menu=self.menu)

        self.fileMenu = tk.Menu(self.menu, font=("Courier", 9))
        self.fileMenu.add_command(label="New             Ctrl+N", command=self.newFile)
        self.fileMenu.add_command(label="Open            Ctrl+O", command=self.openFile)
        self.fileMenu.add_command(label="Save            Ctrl+S", command=self.saveFile)
        self.fileMenu.add_command(label="Save As         Ctrl+Shift+S", command=self.saveAsFile)
        self.fileMenu.add_separator()
        self.fileMenu.add_command(label="New Window", command=self.addtab)
        self.fileMenu.add_command(label="Close Window", command=self.removetab)
        self.fileMenu.add_separator()
        self.fileMenu.add_command(label="Exit            Alt+F4", command=self.close)
        self.menu.add_cascade(label="File", menu=self.fileMenu)

        self.runMenu = tk.Menu(self.menu, font=("Courier", 9))
        self.runMenu.add_command(label="Run", command=self.run)
        self.menu.add_cascade(label="Run", menu=self.runMenu)

    def bottomLabel(self):
        self.positionAndLanguage = tk.Label(self, text=" Ln: 1, Col: 0, Lang: Plain", anchor=tk.W, bg="#E7E7E7", font=("Courier New", 8))
        self.positionAndLanguage.pack(fill=tk.X, side=tk.BOTTOM)

    def updateBottomLabel(self):
        self.row = self.text.index(tk.INSERT).split(".")[0]
        self.column = self.text.index(tk.INSERT).split(".")[1]
        self.positionAndLanguage["text"] = " Ln: {0}, Col: {1}, Lang: {2}".format(self.row, self.column, self.language)

    def newFile(self):
        self.addtab()

    def openFile(self):
        try:
            self.fileName = tk.filedialog.askopenfilename() #Asks user to open file
            with open(self.fileName, 'r') as file:
                self.content = file.read() #Reads content typed
            self.text.delete(0.0, tk.END) 
            self.text.insert(0.0, self.content)
            self.highlight(self)
        except IOError as e:
            print("Error reading file.")
        except:
            print("Unexpected error occured.")

    def deleteContent(self, file):
        file.seek(0)
        file.truncate()

    def saveFile(self):
        self.content = self.text.get(0.0, tk.END)

        try:
            with open(self.fileName, 'w') as file:
                self.deleteContent(file)
                file.write(self.content)
        except IOError as e:
            print("Error reading file.")
        except:
            print("Unexpected error occured.")

    def saveAsFile(self):
        self.content = self.text.get(0.0, tk.END)

        try:
            self.fileName = tk.filedialog.asksaveasfilename()
            if self.fileName != None:
                with open(self.fileName, 'w') as file:
                    file.write(self.content)
        except IOError as e:
            print("Error reading file.")
        except:
            print("Unexcepted error occured.")

    def close(self):
        try:
            os._exit(0)
        except:
            print(sys.exc_info()[0])

    def _on_change(self, event):
        self.linenumbers.redraw()

if __name__ == "__main__":
    root = tk.Tk()
    root.title("Arshi")
    root.geometry("1024x600")
    window = Arshi(root).pack(side="top", fill="both", expand=True)
    root.mainloop()

目前，open()不起作用，并且每个标签的底部标签都会重复，您应该考虑如何解决这些问题。底部标签可以从Tab类移回Arshi，然后在更改标签以相应更改底部标签时，Tab类和Arshi之间进行一些通信

另外，open应该打开一个新选项卡，这样您就可以轻松地进行操作了。我还建议您理解完整的代码，然后在代码中使用它，而不仅仅是复制粘贴。