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<title>WEB打印控件LODOP的样例二十九:各种长度单位的使用</title>
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<h2><font color="#009999">演示使用各种长度单位：</font></h2>
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<td>Lodop很多函数的参数可声明使用<font color="#0000FF">in(英寸)、cm(厘米)、mm(毫米)、pt(磅)</font><font color="#0000FF">、px(1/96英寸)</font>等长度单位，</td>
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注意这里的<font color="#0000FF">px</font>不是像素，是绝对长度单位，<font color="#0000FF">1px</font>等于<font color="#0000FF">1/96</font>英寸，与正常<font color="#0000FF">DPI</font>显示设置的像素值相等。如果
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采用该单位，那么正常显示的屏幕内容与实际打印输出的内容大小相当，这个长度单位可以实现感觉上
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的“所见等于所打”，<font color="#0000FF">px</font>是缺省长度单位，如此以来，单位换算关系为：
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<font color="#0000FF">1in = 2.54cm = 25.4mm = 72pt = 96px</font>
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如下是相关函数清单(红色参数部分):
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<font color="#0000FF" size="2">PRINT_INITA(</font><font color="#FF0000" size="2">Top,Left,Width,Height</font><font color="#0000FF" size="2">,strPrintTaskName);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_TEXT(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strContent:);</font></td>
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<td style="vertical-Alignment: top" width="739"><font color="#0000FF" size="2">ADD_PRINT_HTM(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strHtml);</font></td>
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<td style="vertical-Alignment: top" width="739"><font color="#0000FF" size="2">ADD_PRINT_TABLE(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strHtml);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_URL(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strURL);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_IMAGE(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strHtml);</font></td>
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<td style="vertical-Alignment: top" width="739"><font color="#0000FF" size="2">ADD_PRINT_TBURL(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strURL);</font></td>
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<td style="vertical-Alignment: top" width="739"><font color="#0000FF" size="2">ADD_PRINT_HTML(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strHtml);</font></td>
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<td style="vertical-Alignment: top" width="739"><font color="#0000FF" size="2">ADD_PRINT_LINE(</font><font color="#FF0000" size="2">Top1,Left1,Top2,Left2,</font><font color="#0000FF" size="2">intLineStyle,intLineWidth);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_RECT(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">intLineStyle,intLineWidth);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_ELLIPSE(</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">intLineStyle,intLineWidth);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_SHAPE(intShapeType,</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">intLineStyle,intLineWidth);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_TEXTA(strItemName,</font><font color="#FF0000" size="2">Top,Left,Width,Height,</font><font color="#0000FF" size="2">strContent);</font></td>
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<font color="#0000FF" size="2">SET_PREVIEW_WINDOW(intDispMode,intToolMode,blDirectPrint,</font><font color="#FF0000" size="2">Width,Height,</font><font color="#0000FF" size="2">strPButtonCaptoin);</font>
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例如画100mm×12.4mm矩形框，如下几行代码都可以实现：</td>
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<font color="#0000FF" size="2">ADD_PRINT_RECT(26,37,378,47,0,1);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_RECT("72pt","27.8pt","283.5pt","35.2pt",0,1);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_RECT("43.9mm","9.8mm","100mm","12.4mm",0,1);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_RECT("6.24cm",".98cm","10cm","1.24cm",0,1);</font></td>
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<font color="#0000FF" size="2">ADD_PRINT_RECT("3.177in",".385in","3.938in",".49in",0,1);</font></td>
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<td style="vertical-Alignment: top" width="739">用以上代码进入<a href="javascript:myDesign()"><b>打印设计</b></a>看看！</td>
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<p><a href="PrintSampIndex.html"><<回样例目录</a></p>
<script language="javascript" type="text/javascript">
var LODOP; //声明为全局变量
function myDesign() {
LODOP=getLodop();
LODOP.PRINT_INIT("打印控件功能演示_Lodop功能_计量单位演示");
LODOP.ADD_PRINT_RECT(26,37,378,47,0,1);
LODOP.ADD_PRINT_RECT("72pt","27.8pt","283.5pt","35.2pt",0,1);
LODOP.ADD_PRINT_RECT("43.9mm","9.8mm","100mm","12.4mm",0,1);
LODOP.ADD_PRINT_RECT("6.24cm",".98cm","10cm","1.24cm",0,1);
LODOP.ADD_PRINT_RECT("3.177in",".385in","3.938in",".49in",0,1);
LODOP.PRINT_DESIGN();
};
</script>
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