2017-09-13 211 views
1

我正在開發一個使用Perl的Tk模塊的桌面客戶端。我有一個按鈕可以打開特定任務的目錄。但是我面臨的問題是它關閉了我不想要的Perl接口。瀏覽目錄中的Perl Tk窗口自動關閉

下面是實現邏輯目錄打開子:我通過調用這個子

sub open_directory { 
    my $directory = shift; 
    print "comes here atleast for $directory"; 
    if ($^O eq 'MSWin32') { 
    exec "start $directory"; 
    } 
    else { 
    die "cannot open folder on your system: $^O"; 
    } 
} 

sub second_window{ 

    my $row = 0; 
    $mw2 = new MainWindow; 

    #Loop for listing taskname,path and browse button for all tasks of a region 
    for my $i(1..$#tasks_region_wise){ 
     $row = $row+1; 
     $frame_table-> Label(-text=>$sno+$i,-font=>"calibri")->grid(-row=>$row,-column=>0,-sticky=>'w'); 
     $frame_table-> Label(-text=>$tasks_region_wise[$i][2],-font=>"calibri")->grid(-row=>$row,-column=>1,-sticky=>'w'); 
     $frame_table-> Label(-text=>$tasks_region_wise[$i][3],-font=>"calibri")->grid(-row=>$row,-column=>2,-sticky=>'w'); 


#Calling that sub in the below line: 

     $frame_table->Button(-text => 'Browse',-relief =>'raised',-font=>"calibri",-command => [\&open_directory, $tasks_region_wise[$i][3]],-activebackground=>'green',)->grid(-row=>$row,-column=>3); 
     $frame_table->Button(-text => 'Execute',-relief =>'raised',-font=>"calibri",-command => [\&open_directory, $tasks_region_wise[$i][4]],-activebackground=>'green',)->grid(-row=>$row,-column=>4); 
     $frame_table->Button(-text => 'Detail',-relief =>'raised',-font=>"calibri",-command => [\&popupBox, $tasks_region_wise[$i][2],$tasks_region_wise[$i][5]],-activebackground=>'green',)->grid(-row=>$row,-column=>5); 

    } 
    $frame_table->Label()->grid(-row=>++$row); 
    $frame_table->Button(-text => 'Back',-relief =>'raised',-font=>"calibri",-command => \&back,-activebackground=>'green',)->grid(-row=>++$row,-columnspan=>4); 

    MainLoop; 
} 

它正確地打開文件資源管理器窗口,但關閉了Perl接口。

+0

我認爲這個問題是'exec'調用,它用一個新的替換當前正在運行的可執行文件。 – ulix

+0

感謝那個@ulix,我已經通過使用系統函數而不是exec調用來解決這個問題。 – Mohit

回答

2

發佈以供將來參考給面臨此問題的任何人。我剛剛得到了一個正確的問題,由一個Stackoverflow用戶@ulix評論。

問題:這裏的問題是exec調用導致當前的腳本執行停止並執行start directory命令。

解決方案:將exec調用轉換爲不觸發exec的系統調用,並由Perl處理。

PFB子的更新代碼:

sub open_directory { 
    my $directory = shift; 
    print "comes here atleast for $directory"; 
    if ($^O eq 'MSWin32') { 
    system("start $directory"); 
    } 
    else { 
    die "cannot open folder on your system: $^O"; 
    } 
}