//
protected override void OnStart(AppHost host)
{
_textbox = new LayoutFarm.CustomWidgets.TextBox(400, 30, false);
_textbox.SetLocation(20, 20);
var style2 = new TextEditing.TextSpanStyle();
style2.ReqFont = new PixelFarm.Drawing.RequestFont("tahoma", 14);
style2.FontColor = new PixelFarm.Drawing.Color(0, 0, 0);
_textbox.DefaultSpanStyle = style2;
var textSplitter = new LayoutFarm.CustomWidgets.ContentTextSplitter();
_textbox.TextSplitter = textSplitter;
_listbox = new CustomWidgets.ListBox(300, 200);
_listbox.SetLocation(0, 40);
_listbox.Visible = false;
//------------------------------------
//create special text surface listener
var textSurfaceListener = new LayoutFarm.TextEditing.TextSurfaceEventListener();
textSurfaceListener.CharacterAdded += (s, e) => UpdateSuggestionList();
textSurfaceListener.CharacterRemoved += (s, e) => UpdateSuggestionList();
textSurfaceListener.PreviewArrowKeyDown += new EventHandler <TextEditing.TextDomEventArgs>(textSurfaceListener_PreviewArrowKeyDown);
textSurfaceListener.PreviewEnterKeyDown += new EventHandler <TextEditing.TextDomEventArgs>(textSurfaceListener_PreviewEnterKeyDown);
_textbox.TextEventListener = textSurfaceListener;
//------------------------------------
host.AddChild(_textbox);
host.AddChild(_listbox);
//------------------------------------
BuildSampleCountryList();
}
protected override void OnStart(AppHost host)
{
var listbox = new LayoutFarm.CustomWidgets.ListBox(300, 400);
listbox.SetLocation(10, 10);
listbox.BackColor = KnownColors.FromKnownColor(KnownColor.LightGray);
//add list view to viewport
host.AddChild(listbox);
//add
RequestFont listItemFont = new RequestFont("tahoma", 18);
for (int i = 0; i < 10; ++i)
{
var listItem = new LayoutFarm.CustomWidgets.ListItem(400, 20);
if ((i % 2) == 0)
{
listItem.BackColor = KnownColors.FromKnownColor(KnownColor.OrangeRed);
}
else
{
listItem.BackColor = KnownColors.FromKnownColor(KnownColor.Orange);
}
listItem.SetFont(listItemFont);
listItem.Text = "A" + i;
listbox.AddItem(listItem);
}
}
void UpdateSuggestionList()
{
//find suggestion words
_currentLocalText = null;
_listbox.ClearItems();
TextEditing.Run currentSpan = _textbox.CurrentTextSpan;
if (currentSpan == null)
{
_listbox.Visible = false;
return;
}
//-------------------------------------------------------------------------
//sample parse ...
//In this example all country name start with Captial letter so ...
//try to get underlining text
//int startAt, len;
//textbox.FindCurrentUnderlyingWord(out startAt, out len);
string currentTextSpanText = currentSpan.GetText().ToUpper();
//analyze content
char[] textBuffer = currentTextSpanText.ToCharArray();
_textSplitBoundsList.Clear();
_textSplitBoundsList.AddRange(_textbox.TextSplitter.ParseWordContent(textBuffer, 0, textBuffer.Length));
//get last part of splited text
int m = _textSplitBoundsList.Count;
if (m < 1)
{
return;
}
int splitBoundIndex = GetProperSplitBoundIndex(_textSplitBoundsList, _textbox.CurrentLineCharIndex);
if (splitBoundIndex < 0)
{
return;
}
//find current split bounds
Composers.TextSplitBounds selectBounds = _textSplitBoundsList[splitBoundIndex];
_currentLocalText = GetString(textBuffer, selectBounds);
char firstChar = _currentLocalText[0];
if (_words.TryGetValue(firstChar, out List <string> keywords))
{
int j = keywords.Count;
int listViewWidth = _listbox.Width;
for (int i = 0; i < j; ++i)
{
string choice = keywords[i].ToUpper();
if (StringStartsWithChars(choice, _currentLocalText))
{
CustomWidgets.ListItem item = new CustomWidgets.ListItem(listViewWidth, 17);
item.BackColor = KnownColors.LightGray;
item.Tag = item.Text = keywords[i];
_listbox.AddItem(item);
}
}
}
if (_listbox.ItemCount > 0)
{
_listbox.Visible = true;
//TODO: implement selectedIndex suggestion hint here ***
_listbox.SelectedIndex = 0;
//move listview under caret position
var caretPos = _textbox.CaretPosition;
//temp fixed
//TODO: review here
_listbox.SetLocation(_textbox.Left + caretPos.X, _textbox.Top + caretPos.Y + 20);
_listbox.EnsureSelectedItemVisible();
}
else
{
_listbox.Visible = false;
}
//-------------------------------------------------------------------------
}