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--- sample_code:textedit_search [2015/04/01 12:26]
stevegarman
+++ sample_code:textedit_search [2015/08/05 14:40]
@@ Line 1: / Line 1: @@
-====== TextEdit Search ======
-This function is designed to search for a string in a textEdit.
-It starts searching from the current position of the cursor and, if it finds an occurrence of the string, positions the cursor immediately before the occurrence.
-An area immediately following the cursor is highlighted as the selected area.
-If it does not find an occurrence, the cursor is positioned at the beginning of the text, allowing the user to search again from there if required.
-<code JavaScript findtext.js>
-function findtext(thisedt,sought)
-//thisedt = textEdit to be searched.
-//sought = string to be searched for.
-{
-   //both toLowerCase for case-insensitive search
-   var lc = thisedt.GetText().toLowerCase();
-   sought = sought.toLowerCase();
-   //current cursor position is start for search
-   var curs = thisedt.GetCursorPos();
-   //only compare against the searchable range
-   lc = lc.slice(curs+1)
-   // try to find next occurence of sought
-   var pos = lc.search(sought);
-   if ( pos > -1)
-   {
-      //we found it
-      pos  = pos + curs +1
-      thisedt.SetCursorPos(pos)
-      thisedt.SetSelection(pos, pos+sought.length);
-   }
-   else
-   {
-      //not found - go to start of text
-      //user can search again from there if required.
-      thisedt.SetCursorPos(0)
-   }
-}
-</code>
-This function can be used in an app in the manner shown in this sample code
-<code JavaScript samplefind.js>
-var edt,fnd;
-//Called when application is started.
-function OnStart()
-{
-    //Create a layout with objects vertically centered.
-    var lay = app.CreateLayout( "linear", "VCenter,FillXY" );
-    var hlay = app.CreateLayout( "linear", "Horizontal,FillX" );
-    var btn = app.CreateButton("Find");
-    btn.SetOnTouch(doFind);
-    hlay.AddChild(btn);
-    fnd = app.CreateTextEdit("show");
-    fnd.SetHint("Find");
-    hlay.AddChild(fnd);
-    lay.AddChild(hlay);
-    //Create a text label and add it to layout.
-    var scrollEdit = app.CreateScroller( 1.0, 0.83, "" );
-    //Create a textedit and add it to layout.
-    edt = app.CreateTextEdit( "",1,-1,"Left,NoSpell" );
-    edt.SetText(app.ReadFile("/android_asset/app.js"))
-    //edt.SetBackColor("#ffcccccc");
-    //edt.SetTextColor("#ff333333");
-    scrollEdit.AddChild(edt);
-    lay.AddChild( scrollEdit);
-    //Add layout to app.
-    app.AddLayout( lay );
-}
-function doFind()
-{
-   app.HideKeyboard();
-   var findstring = fnd.GetText();
-   findtext(edt,findstring)
-}
-function findtext(thisedt,sought)
-//thisedt = textEdit to be searched.
-//sought = string to be searched for.
-{
-   //both toLowerCase for case-insensitive search
-   var lc = thisedt.GetText().toLowerCase();
-   sought = sought.toLowerCase();
-   //current cursor position is start for search
-   var curs = thisedt.GetCursorPos();
-   //only compare against the searchable range
-   lc = lc.slice(curs+1)
-   // try to find next occurence of sought
-   var pos = lc.search(sought);
-   if ( pos > -1)
-   {
-      //we found it
-      pos  = pos + curs +1
-      thisedt.SetCursorPos(pos)
-      thisedt.SetSelection(pos, pos+sought.length);
-   }
-   else
-   {
-      //not found - go to start of text
-      //user can search again from there if required.
-      thisedt.SetCursorPos(0)
-   }
-}
-</code>

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