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📄 mapxtreme for java中怎样在jsp页面上进行矩形选择？-mygis软件工作室-james mapinfo技术论坛.htm

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      <DIV class=style3 align=left><FONT bold="bold">信息原始来源：<A name=500><FONT 
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            Java中怎样在jsp页面上进行矩形选择？</DIV></TH></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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              <P><A name=25884><FONT color=#000066><B>songqian</B></FONT></A> 
              ：</P>
              <P>我在jsp页面上显示了一幅地图，现在需要从地图上画一个矩形区域，把该区域内的图元集合得到，从而进行分析。但没有思路，不知道怎样在jsp页面上把鼠标划过的参数得到，谁能帮忙指点一下。谢谢了</P>
              <P><A name=25886><FONT color=#990000><B>wtusmchen</B></FONT></A> 
              ：</P>
              <P>用Applet或者javascript捕获鼠标事件</P>
              <P><A name=25957><FONT color=#000066><B>Marsblade</B></FONT></A> 
              ：</P>
              <P>能否提供一个JS实现的例子？？</P>
              <P><A name=25989><FONT color=#000066><B>songqian</B></FONT></A> 
              ：</P>
              <P>我还是没整出来，反编译了自带的工具条上selection那个按钮类，发现它的标签逻辑挺乱的，到底也没看出参数是怎么传到后台的，请高手帮忙啊</P>
              <P><A name=26002><FONT color=#990000><B>wtusmchen</B></FONT></A> 
              ：</P>
              <P>&lt;!DOCTYPE&nbsp;HTML&nbsp;PUBLIC&nbsp;"-//W3C//DTD&nbsp;HTML&nbsp;4.0&nbsp;Transitional//EN"&gt;<BR>&lt;HTML&gt;<BR>&lt;HEAD&gt;<BR>&lt;TITLE&gt;&nbsp;New&nbsp;Document&nbsp;&lt;/TITLE&gt;<BR>&lt;META&nbsp;NAME="Generator"&nbsp;CONTENT="EditPlus"&gt;<BR>&lt;META&nbsp;NAME="Author"&nbsp;CONTENT=""&gt;<BR>&lt;META&nbsp;NAME="Keywords"&nbsp;CONTENT=""&gt;<BR>&lt;META&nbsp;NAME="Description"&nbsp;CONTENT=""&gt;<BR>&lt;/HEAD&gt;</P>
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              <P>function&nbsp;CaptureMouseEvent()<BR>{<BR>&nbsp;document.onmousemove&nbsp;=&nbsp;_mouseMove;<BR>&nbsp;document.onmousedown&nbsp;=&nbsp;_mouseDown;<BR>&nbsp;document.onmouseup&nbsp;&nbsp;=&nbsp;_mouseUp;<BR>}</P>
              <P>//鼠标按下<BR>function&nbsp;_mouseDown()<BR>{<BR>&nbsp;var&nbsp;divStyleObj&nbsp;=&nbsp;document.all.BoxDIV.style;<BR>&nbsp;divStyleObj.left&nbsp;=&nbsp;event.x;<BR>&nbsp;divStyleObj.top&nbsp;=&nbsp;event.y;<BR>&nbsp;divStyleObj.width&nbsp;=&nbsp;0;<BR>&nbsp;divStyleObj.height&nbsp;=0;<BR>&nbsp;divStyleObj.visibility&nbsp;=&nbsp;"visible";<BR>&nbsp;m_mouseDownX&nbsp;=&nbsp;event.x;<BR>&nbsp;m_mouseDownY&nbsp;=&nbsp;event.y;<BR>&nbsp;m_blMouseDown&nbsp;=&nbsp;true;<BR>}<BR>//鼠标移动<BR>function&nbsp;_mouseMove()<BR>{<BR>&nbsp;var&nbsp;x&nbsp;=&nbsp;event.x;<BR>&nbsp;var&nbsp;y&nbsp;=&nbsp;event.y;<BR>&nbsp;var&nbsp;divStyleObj&nbsp;=&nbsp;document.all.BoxDIV.style;<BR>&nbsp;if(m_blMouseDown)<BR>&nbsp;{<BR>&nbsp;&nbsp;if&nbsp;(x&nbsp;&gt;&nbsp;m_mouseDownX)<BR>&nbsp;&nbsp;&nbsp;divStyleObj.left&nbsp;=&nbsp;m_mouseDownX;<BR>&nbsp;&nbsp;else<BR>&nbsp;&nbsp;&nbsp;divStyleObj.left&nbsp;=&nbsp;x;<BR>&nbsp;&nbsp;if&nbsp;(y&nbsp;&gt;&nbsp;m_mouseDownY)<BR>&nbsp;&nbsp;&nbsp;divStyleObj.top&nbsp;&nbsp;=&nbsp;m_mouseDownY;<BR>&nbsp;&nbsp;else<BR>&nbsp;&nbsp;&nbsp;divStyleObj.top&nbsp;&nbsp;=&nbsp;y;<BR>&nbsp;&nbsp;divStyleObj.width&nbsp;=&nbsp;Math.abs(x&nbsp;-&nbsp;m_mouseDownX);<BR>&nbsp;&nbsp;divStyleObj.height=&nbsp;Math.abs(y&nbsp;-&nbsp;m_mouseDownY);<BR>&nbsp;}<BR>}<BR>//鼠标弹起<BR>function&nbsp;_mouseUp()<BR>{<BR>&nbsp;m_blMouseDown&nbsp;=&nbsp;false;<BR>&nbsp;alert("自己处理吧");<BR>&nbsp;var&nbsp;divStyleObj&nbsp;=&nbsp;document.all.BoxDIV.style;<BR>&nbsp;divStyleObj.visibility&nbsp;=&nbsp;"hidden";<BR>}<BR>//--&gt;<BR>&lt;/SCRIPT&gt;</P>
              <P>&lt;BODY&gt;<BR>&lt;input&nbsp;type="button"&nbsp;value="试试看"&nbsp;onclick="CaptureMouseEvent()"&gt;<BR>&lt;div&nbsp;id="BoxDIV"&nbsp;style="position:absolute;left:0;top:0;width:0;height:0;visibility:hidden;"&gt;<BR>&lt;table&nbsp;bordercolor='red'&nbsp;border=1&nbsp;width="100%"&nbsp;height="100%"&nbsp;&nbsp;cellspacing="0"&nbsp;style="border-collapse:&nbsp;collapse"&nbsp;cellpadding="0"&gt;&lt;tr&gt;&lt;td&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;<BR>&lt;/div&gt;<BR>&lt;/BODY&gt;<BR>&lt;/HTML&gt;&nbsp; 
              </P></TD></TR></TBODY></TABLE></BLOCKQUOTE></TD></TR></TBODY></TABLE><BR>
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