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--- sample_code:file_picker [2014/12/06 21:10]
stevegarman change curly brace style
+++ sample_code:file_picker [2015/03/27 04:03]
@@ Line 1: / Line 1: @@
-====== Sample File Picker ======
-This is a simple file choosing dialog which is offered for use on DroidScript v1.12
-When the next version of DroidScript is released, I will tidy it up a bit and add a filter for file extensions.
-Thanks to Tony Jones for testing it on DroidScript v1.12 and confirming that it works.
-See also [[sample_code:folder_picker|Sample Folder Picker]]
-===== The code =====
-<code js filepicker.js>
-//Called when application is started
-function  OnStart()
-  {     //Create a layout with objects vertically centered.
-    lay  =  app.CreateLayout( "linear",  "Vertical,FillXY" );
-         //Create a text label and add it to layout.
-    btn  =  app.CreateButton( "FilePicker demo" );
-    lay.AddChild( btn );
-    btn.SetOnTouch(btn_OnTouch);
-    pick  =  new  FilePicker(mycallback);     // don't show hidden files
-    pick.SetHideFiles(true);     //Add layout to app.
-    app.AddLayout( lay );
-  } //function Onstart()
-function  btn_OnTouch()
-  {
-    pick.SetFolder("/sdcard");
-    pick.Show();
-  } //function btn_OnTouch()
-function  mycallback(fullpath)
-  {
-    app.Alert("user chose "  +  fullpath)
-  } //function mycallback()
-function  FilePicker(Callback, basePath)
-  {
-    var  self  =  this;
-    this.basePath  =  basePath  ||  "/sdcard";
-    this.callback  =  Callback  ||   function() {};
-    this.FolderPath  =  this.basePath;
-    this.hideHiddenFiles  =  false;
-    this.dlg  =  app.CreateDialog(this.basePath);
-    this.lay  =  app.CreateLayout( "linear",  "horizontal,fillxy,left" );
-    this.lstFolds  =  app.CreateList("blank" ,  0.35,  0.7 );
-    this.lstFolds.parent  =  self;
-    this.lstFolds.SetOnTouch(FilePicker_NewFolder);
-    this.lay.AddChild(this.lstFolds);
-    this.lstFiles  =  app.CreateList("blank" ,  0.35,  0.7 );
-    this.lstFiles.parent  =  self;
-    this.lstFiles.SetOnTouch(FilePicker_NewFile);
-    this.lay.AddChild(this.lstFiles);
-    this.dlg.AddLayout(this.lay);
-    this.Show  =   function()
-    {
-      self.dlg.Show();
-    }
-    this.SetHideFiles = function(val)
-    {
-      if (val  ==  undefined)  val  =  true;
-      self.hideHiddenFiles  =  val;
-    }
-    this.Hide  =   function()
-    {
-      self.dlg.Hide();
-    }
-    this.SetFilter  =   function(filter)
-    {
-      self.fileFilter  =  filter;
-    }
-    this.GetFolder  =   function()
-    {
-      return  self.FolderPath;
-    }
-    this.SetFolder  =   function(folderPath)
-    {
-      self.FolderPath  =  folderPath;
-      self.dlg.SetTitle(folderPath);
-      app.ShowProgress( "Loading..." );
-      var  lst  =  app.ListFolder(folderPath);
-      lst.sort(function(x, y)
-      {
-        return  (x.toLowerCase()  >  y.toLowerCase()) ? 1 : -1
-      });     //var dirlist=[];
-           //var fillist = [];
-      var  ths  =  lst.shift();
-      self.lstFolds.SetList("");
-      if ( self.FolderPath  !=  self.basePath )       self.lstFolds.AddItem("..", null, "folder");
-      self.lstFiles.SetList("");
-      while  (undefined  !=  ths)
-      {
-        if  ((! self.hideHiddenFiles)  ||  (ths.indexOf(".")  !=  0))
-        {
-          var  pth  =  folderPath  +  "/"  +  ths;
-          if  (app.IsFolder(pth))            self.lstFolds.AddItem(ths, null, "folder")
-          else            self.lstFiles.AddItem(ths)
-        }
-        ths  =  lst.shift();
-      }
-      app.HideProgress();
-    }
-  } //function FilePicker()
-function  FilePicker_NewFolder(fil)
-  {
-    var  par  =  this.parent;
-    var  pth  =  par.GetFolder();
-    if  (fil  !=  "..")
-    {
-      pth  +=  "/"  +  fil
-    }
-    else
-    {
-      if ( pth  ==  par.basePath  ||  pth  ==  "/" )
-      {
-        par.Hide()        return;
-      }
-      var  tst  =  pth.split("/");
-      tmp  =  tst.pop();
-      pth  =   (tst.join("/"));
-    }
-    par.SetFolder(pth);
-  } //function FilePicker_NewFolder()
-function  FilePicker_NewFile(fil)
-  {
-    var  par  =  this.parent;
-    var  pth  =  par.GetFolder();
-    par.Hide();
-    par.callback(pth  +=  "/"  +  fil);
-  } //function FilePicker_NewFile()
-</code>
-===== How to use it =====
-You need three function from the code above
-<code>function FilePicker</code>
-<code>function FilePicker_NewFolder</code>
-<code>function FilePicker_NewFile</code>
-In your main code, you need something like
-<code>    pick = new FilePicker(myCallBack);
-    pick.SetFolder("/sdcard");
-    pick.Show();</code>
-where myCallBack is a function which is called when a file is chosen. It is defined like
-<code>function myCallBack(fullpath){
-    app.ShowPopup("user chose " + fullpath)
-}</code>
-and it passes you the full path of the file that is chosen.

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