Monday, March 25, 2013

How to scan using Twain in JavaScript.



<html>
                <head>
                                <title>Image View Sample</title>
                                <script language="javascript">
                               
                                function btnFirstImage_onclick() {
                                                if (frmScan.DynamicWebTwain1.HowManyImagesInBuffer == 0){
                                        alert("There is no image in buffer");
                                        return;
                                                } 
                                                frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer = 0;
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                }
                               
                                function btnPreImage_onclick() {
                                                if (frmScan.DynamicWebTwain1.HowManyImagesInBuffer == 0){
                                        alert("There is no image in buffer");
                                        return;
                                                }
                                                if (frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer == 0)
                                        return;
                                                frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer - 1;
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                }
                               
                                function btnNextImage_onclick() {
                                                if (frmScan.DynamicWebTwain1.HowManyImagesInBuffer == 0){
                                        alert("There is no image in buffer");
                                        return;
                                                }
                                                if (frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer == frmScan.DynamicWebTwain1.HowManyImagesInBuffer - 1)
                                        return;
                                                frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer + 1;
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                }
                               
                                function btnLastImage_onclick() {
                                                if (frmScan.DynamicWebTwain1.HowManyImagesInBuffer == 0){
                                        alert("There is no image in buffer");
                                        return;
                                                }
                                                frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer = frmScan.DynamicWebTwain1.HowManyImagesInBuffer - 1;
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                }
                               
                                function btnDeleteImage_onclick() {
                                                if (frmScan.DynamicWebTwain1.HowManyImagesInBuffer == 0){
                                        alert("There is no image in buffer");
                                        return;
                                                }
                                                frmScan.DynamicWebTwain1.RemoveImage (frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer);
                                                if (frmScan.DynamicWebTwain1.HowManyImagesInBuffer == 0){
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = "";
                                                return;
                                                }
                                                else{
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                                }
                                }
                               
                                function btnAcquire_onclick() {
                                                frmScan.DynamicWebTwain1.SelectSource();
                                                frmScan.DynamicWebTwain1.OpenSource();
                                                frmScan.DynamicWebTwain1.AcquireImage();
                                }
                               
                                function DynamicWebTwain1_OnPostTransfer() {
                                                frmScan.DynamicWebTwain1.CloseSource();
                               
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                }
                               
                                function DynamicWebTwain1_OnPostAllTransfers() {
                                                frmScan.DynamicWebTwain1.CloseSource();
                               
                                                frmScan.TotalImage.value = frmScan.DynamicWebTwain1.HowManyImagesInBuffer;
                                                frmScan.CurrentImage.value = frmScan.DynamicWebTwain1.CurrentImageIndexInBuffer+1;
                                }
                                function window_onload() {
                                                frmScan.DynamicWebTwain1.MaxImagesInBuffer = 4;
                                                //The Trial version can only hold 4 images in buffer. The Full version can hold 1000+.
                                               
                                                frmScan.TotalImage.value = "0";
                                                frmScan.CurrentImage.value = "";
                                }
                                </script>
                                <script language=javascript for=DynamicWebTwain1 event=OnPostTransfer>
                                <!--
                                 DynamicWebTwain1_OnPostTransfer();
                                //-->
                                </script>
                                <script language=javascript for=DynamicWebTwain1 event=OnPostAllTransfers>
                                <!--
                                 DynamicWebTwain1_OnPostAllTransfers();
                                //-->
                                </script>
                </head>

                <body onload="return window_onload()">
                <p align="center">
                <b>Scan an image</b>
                <object classid = "clsid:5220cb21-c88d-11cf-b347-00aa00a28331">
                                <param name="LPKPath" VALUE="DynamicWebTwain.lpk"/>
                </object> 
                </p>
               
                                <form id="frmScan">
                                                <table width="100%">
                                                                <tr>
                                                                <td>
                                                                <center>            
                                                                <object classid="clsid:FFC6F181-A5CF-4EC4-A441-093D7134FBF2" id="DynamicWebTwain1" width="360" height="500"
                                                                                                CodeBase = "DynamicWebTWAIN.cab#version=7,0">
                                                                                <param name="_cx" value="847"/>
                                                                                <param name="_cy" value="847"/>
                                                                                <param name="JpgQuality" value="80"/>
                                                                                <param name="Manufacturer" value="DynamSoft Corporation"/>
                                                                                <param name="ProductFamily" value="Dynamic Web TWAIN"/>
                                                                                <param name="ProductName" value="Dynamic Web TWAIN"/>
                                                                                <param name="VersionInfo" value="Dynamic Web TWAIN 7.0"/>
                                                                                <param name="TransferMode" value="0"/>
                                                                                <param name="BorderStyle" value="0"/>
                                                                                <param name="FTPUserName" />
                                                                                <param name="FTPPassword" />
                                                                                <param name="FTPPort" value="21"/>
                                                                                <param name="HTTPUserName" />
                                                                                <param name="HTTPPassword" />
                                                                                <param name="HTTPPort" value="80"/>
                                                                                <param name="ProxyServer" />
                                                                                <param name="IfDisableSourceAfterAcquire" value="0"/>
                                                                                <param name="IfShowUI" value="-1"/>
                                                                                <param name="IfModalUI" value="-1"/>
                                                                                <param name="IfTiffMultiPage" value="0"/>
                                                                                <param name="IfThrowException" value="0"/>
                                                                                <param name="TIFFCompressionType" value="0"/>
                                                                                <param name="IfFitWindow" value="-1"/>
                                                                </object>
                                                                </center>          
                                                                </td>
                                                                </tr>
                                                                               
                                                                <tr>
                                                                <td>
                                                                <center>            
                                                    <p align="center">
                                                    <input type="button" value="|&lt;" language=javascript onclick="return btnFirstImage_onclick()"/>
                                                    <input type="button" value="&lt;" language=javascript onclick="return btnPreImage_onclick()"/>
                                                    <!--webbot bot="Validation" S-Data-Type="Integer" S-Number-Separators="," -->
                                                    <input type="text" name="CurrentImage" size="2" id="CurrentImage" readonly="readOnly"/>/
                                                    <!--webbot bot="Validation" S-Data-Type="Integer" S-Number-Separators="," -->
                                                    <input type="text" name="TotalImage" size="2" id="TotalImage" readonly="readOnly" value="0"/>
                                                    <input type="button" value="&gt;" language=javascript onclick="return btnNextImage_onclick()"/>
                                                    <input type="button" value="&gt;|" language=javascript onclick="return btnLastImage_onclick()"/>
                                                    <p class="MsoNormal" align="center">
                                                    <input type="button" value="Scan Image" language=javascript onclick="return btnAcquire_onclick()"/></p>   
                                                    <p class="MsoNormal" align="center">
                                                    <input type="button" value="Delete current image" language=javascript onclick="return btnDeleteImage_onclick()"/></p>
                                                                </center>
                                                                </td>
                                                                </tr>
                                                               
                                                </table>
                                </form>
                </body>
</html>

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