Perl Tk grid 布局

<pre name="code" class="sql">#!/usr/local/bin/perl
use Tk;
use dbi;
#Global Variables
my $age = 10;
# Main Window
my $mw = new MainWindow;
#GUI Building Area


#Age

my $but1 = $mw -> Button(-text=>"view cpu", -command =>&push_button1); ## 执行函数push_butto
my $but2 = $mw -> Button(-text=>"view memory", -command =>&push_button2); ## 执行函数push_butto
my $but3 = $mw -> Button(-text=>"view disk", -command =>&push_button3); ## 执行函数push_butto
my $but4 = $mw -> Button(-text=>"view err", -command =>&push_button4); ## 执行函数push_butto
my $but5 = $mw -> Button(-text=>"view syslog", -command =>&push_button5); ## 执行函数push_butto
my $but6 = $mw -> Button(-text=>"view event", -command =>&push_button6); ## 执行函数push_butto

#Text Area
my $textarea = $mw -> Frame();
my $txt = $textarea -> Text(-width=>200, -height=>100);

my $srl_y = $textarea -> Scrollbar(-orient=>'v',-command=>[yview => $txt]);  ##Scrollbar滚动条垂直 

my $srl_x = $textarea -> Scrollbar(-orient=>'h',-command=>[xview => $txt]);

$txt -> configure(-yscrollcommand=>['set', $srl_y], ##yscrollcommand文本部件和滚动条通讯

-xscrollcommand=>['set',$srl_x]);
#Geometry Management
#columnspan=>2 占据的列数

$but1 -> grid(-row=>1,-column=>0,-columnspan=>1);
$but2 -> grid(-row=>1,-column=>1,-columnspan=>1);
$but3 -> grid(-row=>1,-column=>2,-columnspan=>1);
$but4 -> grid(-row=>1,-column=>3,-columnspan=>1);
$but5 -> grid(-row=>1,-column=>4,-columnspan=>1);
$but6 -> grid(-row=>1,-column=>5,-columnspan=>1);
$txt -> grid(-row=>1,-column=>1);
$srl_y -> grid(-row=>1,-column=>5,-sticky=>"ns");
$srl_x -> grid(-row=>2,-column=>1,-sticky=>"ew");

#文本区域 从第2行顶格开始长度为6
$textarea -> grid(-row=>2,-column=>0,-columnspan=>6);
MainLoop;



sub push_button1 {
# system("cls");
my $dbName = 'june';  
my $dbUser = 'test';  
my $dbUserPass = 'test';  
my $dbh = DBI->connect("dbi:Oracle:$dbName", $dbUser, $dbUserPass) or die "can't connect to database " ;
my $hostSql = qq{select table_name,tablespace_name,status from user_tables};  
 

my ($table_name, $tablespace_name, $status);  
my $selStmt = $dbh->prepare($hostSql);  
$selStmt->bind_columns(undef, $table_name, $tablespace_name, $status);  
$selStmt->execute();  
while( $selStmt->fetch() ){  
	#print "$table_name		   $tablespace_name		$status
";  
$txt -> insert("end","$table_name	$tablespace_name	$status"."
");
}  
$selStmt->finish;  
$dbh->disconnect; 
}