两个frame同步滚动

本文提供了一个简单的帧同步滚动Demo,通过JavaScript实现两个iframe内的滚动条同步滚动效果,并提供了开启和关闭同步的功能。

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应网友要求,写了一个frame同步滚动的DEMO,很简单,收录在这里:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
    body 
{
        font-size
:9pt;
        color
:#333333;
    
}

    iframe 
{
        position
:absolute;
        width
:200px;
        height
:400px;
        margin
:20px;
        border
:1px solid #FF6600;
    
}

    #ifr1 
{
        left
:20px;
        top
:20px;
    
}

    #ifr2 
{
        left
:320px;
        top
:20px;
    
}

</style>
<script type="text/javascript">
    
function FrameHelper(ifr1,ifr2){
        
this.ifr1 = ifr1;
        
this.ifr2 = ifr2;
        
this.syncable = true;
        
this.bindEvent();
    }

    FrameHelper.prototype 
= {
        sync:
function(activeFrame){
            
if(!this.syncable)return;
            
var passiveFrame = (activeFrame == this.ifr1) ? this.ifr2 : this.ifr1;
            
if(activeFrame.document.documentElement){
                passiveFrame.document.documentElement.scrollTop 
= activeFrame.document.documentElement.scrollTop;
                passiveFrame.document.documentElement.scrollLeft 
= activeFrame.document.documentElement.scrollLeft;
            }
else{
                passiveFrame.document.body.scrollTop 
= activeFrame.document.body.scrollTop;
                passiveFrame.document.body.scrollLeft 
= activeFrame.document.body.scrollLeft;
            }

        }
,
        bindEvent:
function(){
            
var _this = this;
            
if(document.all){
                
this.ifr1.attachEvent("onscroll",function(){_this.sync(_this.ifr1);});
                
this.ifr2.attachEvent("onscroll",function(){_this.sync(_this.ifr2);});
            }
else{
                
this.ifr1.addEventListener("scroll",function(){_this.sync(_this.ifr1);},false);
                
this.ifr2.addEventListener("scroll",function(){_this.sync(_this.ifr2);},false);
            }

        }
,
        syncModeOn:
function(){
            
this.syncable = true;
        }
,
        syncModeOff:
function(){
            
this.syncable = false;
        }

    }

    window.onload 
= function(){
        
var fh = new FrameHelper(document.getElementById("ifr1").contentWindow,document.getElementById("ifr2").contentWindow);
        document.getElementById(
"toggle").onchange = function(){
            (
!!this.checked)?fh.syncModeOn():fh.syncModeOff();
        }

    }

</script>
</head>

<body>
<iframe id="ifr1" src="s.html"></iframe>
<iframe id="ifr2" src="s.html"></iframe>
<input type="checkbox" id="toggle" checked="checked"/>是否同步滚动
</body>
</html>

 
在PySimpleGUI中,不同元素之间的滚动同步可以通过使用`TKScrollableFrame`实现。`TKScrollableFrame`是一个自定义的PySimpleGUI元素,它可以将多个PySimpleGUI元素包含在一个可滚动的框架中。 以下是一个示例程序,它将两个`Multiline`元素包含在一个`TKScrollableFrame`中,并实现了它们之间的滚动同步: ```python import PySimpleGUI as sg # Define the layout layout = [ [ sg.TKScrollableFrame( layout=[ [sg.Multiline(size=(40, 10), key="-MULTI1-")], [sg.Multiline(size=(40, 10), key="-MULTI2-")] ], size=(600, 400), scrollable=True, vertical_scroll_only=True ) ], [sg.Button("Exit")] ] # Create the window window = sg.Window("Scrollable Frame", layout) # Create a reference to the scrollable frame scrollable_frame = window["-TKScrollableFrame-"] # Create a reference to each multiline element multi1 = window["-MULTI1-"] multi2 = window["-MULTI2-"] # Loop to process window events while True: event, values = window.read() # Exit if the Exit button is clicked or the window is closed if event == sg.WINDOW_CLOSED or event == "Exit": break # Synchronize the scroll positions of the multiline elements scroll_position = scrollable_frame.vertical_scroll_position multi1.Widget.yview_moveto(scroll_position) multi2.Widget.yview_moveto(scroll_position) # Close the window window.close() ``` 在上面的示例程序中,`TKScrollableFrame`元素包含了两个`Multiline`元素。当用户在其中一个`Multiline`元素中滚动时,代码会将另一个`Multiline`的滚动位置设置为相同的值,从而实现它们之间的滚动同步
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