Source canvas gui widgets LineEdit.nas
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gui.widgets.LineEdit = {
new: func(parent, style, cfg)
{
var m = gui.Widget.new(gui.widgets.LineEdit);
m._cfg = Config.new(cfg);
m._focus_policy = m.StrongFocus;
m._setView( style.createWidget(parent, "line-edit", m._cfg) );
m.setLayoutMinimumSize([28, 16]);
m.setLayoutSizeHint([150, 28]);
m._text = "";
m._max_length = 32767;
m._cursor = 0;
m._selection_start = 0;
m._selection_end = 0;
return m;
},
setText: func(text)
{
me._text = utf8.substr(text, 0, me._max_length);
me._cursor = utf8.size(me._text);
me._selection_start = me._cursor;
me._selection_end = me._cursor;
if( me._view != nil )
me._view.setText(me, me._text);
return me;
},
text: func()
{
return me._text;
},
setMaxLength: func(len)
{
me._max_length = len;
if( utf8.size(me._text) <= len )
return me;
me._text = utf8.substr(me._text, 0, me._max_length);
me.moveCursor(me._cursor);
return me;
},
moveCursor: func(pos, mark = 0)
{
var len = utf8.size(me._text);
me._cursor = math.max(0, math.min(pos, len));
me._selection_start = me._cursor;
me._selection_end = me._cursor;
me._onStateChange();
return me;
},
home: func()
{
me.moveCursor(0);
},
end: func()
{
me.moveCursor(utf8.size(me._text));
},
# Insert given text after cursor (and first remove selection if set)
insert: func(text)
{
var after = utf8.substr(me._text, me._selection_end);
me._text = utf8.substr(me._text, 0, me._selection_start);
# Replace selected text, insert new text and place cursor after inserted
# text
var remaining = me._max_length - me._selection_start - utf8.size(after);
if( remaining != 0 )
me._text ~= utf8.substr(text, 0, remaining);
me._cursor = utf8.size(me._text);
me._selection_start = me._cursor;
me._selection_end = me._cursor;
me._text ~= after;
if( me._view != nil )
me._view.setText(me, me._text);
return me;
},
paste: func(mode = nil)
{
me.insert(clipboard.getText(mode != nil ? mode : clipboard.CLIPBOARD));
},
# Remove selected text
removeSelection: func()
{
if( me._selection_start == me._selection_end )
return me;
me._text = utf8.substr(me._text, 0, me._selection_start)
~ utf8.substr(me._text, me._selection_end);
me._cursor = me._selection_start;
me._selection_end = me._selection_start;
if( me._view != nil )
me._view.setText(me, me._text);
return me;
},
# Remove selection or if nothing is selected the character before the cursor
backspace: func()
{
if( me._selection_start == me._selection_end )
{
if( me._selection_start == 0 )
# Before first character...
return me;
me._selection_start -= 1;
}
me.removeSelection();
return me;
},
# Remove selection or if nothing is selected the character after the cursor
del: func()
{
if( me._selection_start == me._selection_end )
{
if( me._selection_end == utf8.size(me._text) )
# After last character...
return me;
me._selection_end += 1;
}
me.removeSelection();
return me;
},
# protected:
_setView: func(view)
{
call(gui.Widget._setView, [view], me);
var el = view._root;
el.addEventListener("keypress", func (e) me.insert(e.key));
el.addEventListener("keydown", func (e)
{
if( me._view == nil )
return;
if( e.key == "Enter" )
me._trigger("editingFinished", {text: me.text()}); # TODO validator/etc.
else if( e.key == "Backspace" )
me.backspace();
else if( e.key == "Delete" )
me.del();
else if( e.key == "Left" )
me.moveCursor(me._cursor - 1);
else if( e.key == "Right")
me.moveCursor(me._cursor + 1);
else if( e.key == "Home" )
me.home();
else if( e.key == "End" )
me.end();
else if( e.keyCode == `v` and e.ctrlKey )
me.paste();
});
}
};