com.lushprojects.circuitjs1.client.LoadFile.java Source code

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Here is the source code for com.lushprojects.circuitjs1.client.LoadFile.java

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/*    
Copyright (C) Paul Falstad and Iain Sharp
    
This file is part of CircuitJS1.
    
CircuitJS1 is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
    
CircuitJS1 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with CircuitJS1.  If not, see <http://www.gnu.org/licenses/>.
*/

package com.lushprojects.circuitjs1.client;

import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ContextMenuEvent;

public class LoadFile extends FileUpload implements ChangeHandler {

    static CirSim sim;

    static public final native boolean isSupported()
    /*-{
     return !!($wnd.File && $wnd.FileReader);
     }-*/;

    static public void doLoadCallback(String s) {
        sim.pushUndo();
        sim.readSetup(s, true);
        sim.createNewLoadFile();
    }

    LoadFile(CirSim s) {
        super();
        sim = s;
        this.setName("Import");
        this.getElement().setId("LoadFileElement");
        this.addChangeHandler(this);
        this.addStyleName("offScreen");
    }

    public void onChange(ChangeEvent e) {
        doLoad();
    }

    public final native void click()
    /*-{
       $doc.getElementById("LoadFileElement").click();
     }-*/;

    static public final native void doLoad()
    /*-{
     var oFiles = $doc.getElementById("LoadFileElement").files,
      nFiles = oFiles.length;
      if (nFiles>=1 && oFiles[0].size<32000) {
          var reader = new FileReader();
         reader.onload = function(e) {
              var text = reader.result;
              @com.lushprojects.circuitjs1.client.LoadFile::doLoadCallback(Ljava/lang/String;)(text);
          };
        
         reader.readAsText(oFiles[0]);
      }
     }-*/;

}