///<summary>Creates a list box under given textBox filled with filtered list of recommended emails based on textBox.Text values. ///Key is used to navigate list indirectly.</summary> private void RecommendedEmailHelper(ODtextBox textBox, Keys key) { if (_listHistoricContacts.Count == 0) //No recommendations to show. { return; } //The passed in textBox's tag points to the grid of options. //The created grid's tag will point to the textBox. if (textBox.Tag == null) { textBox.Tag = new ODGrid() { TranslationName = "", }; } ODGrid gridContacts = (ODGrid)textBox.Tag; //textBox.Text could contain multiple email addresses. //We only want to grab the last few characters as the filter string. //[email protected],[email protected],emai => "emai" is the filter. //When there is no comma, will just use what is currently in the textbox. string emailFilter = textBox.Text.ToLower().Split(',').Last(); if (emailFilter.Length < 2) //Require at least 2 characters for now. { gridContacts.Hide(); //Even if not showing .Hide() won't harm anything. textBox.Tag = null; //Reset tag so that initial logic runs again. return; } #region Key navigation and filtering switch (key) { case Keys.Enter: //Select currently highlighted recommendation. if (gridContacts.Rows.Count == 0) { return; } CloseAndSetRecommendedContacts(gridContacts, true); return; case Keys.Up: //Navigate the recommendations from the textBox indirectly. if (gridContacts.Rows.Count == 0) { return; } //gridContacts is multi select. We are navigating 1 row at a time so clear and set the selected index. int index = Math.Max(gridContacts.GetSelectedIndex() - 1, 0); gridContacts.SetSelected(false); gridContacts.SetSelected(new int[] { index }, true); gridContacts.ScrollToIndex(index); break; case Keys.Down: //Navigate the recommendations from the textBox indirectly. if (gridContacts.Rows.Count == 0) { return; } //gridContacts is multi select. We are navigating 1 row at a time so clear and set the selected index. index = Math.Min(gridContacts.GetSelectedIndex() + 1, gridContacts.Rows.Count - 1); gridContacts.SetSelected(false); gridContacts.SetSelected(new int[] { index }, true); gridContacts.ScrollToIndex(index); break; default: #region Filter recommendations List <string> listFilteredContacts = _listHistoricContacts.FindAll(x => x.ToLower().Contains(emailFilter.ToLower())); if (listFilteredContacts.Count == 0) { gridContacts.Hide(); //No options to show so make sure and hide the list box textBox.Tag = null; //Reset tag. return; } listFilteredContacts.Sort(); gridContacts.BeginUpdate(); if (gridContacts.Columns.Count == 0) //First time loading. { gridContacts.Columns.Add(new ODGridColumn()); } gridContacts.Rows.Clear(); foreach (string email in listFilteredContacts) { ODGridRow row = new ODGridRow(email); row.Tag = email; gridContacts.Rows.Add(row); } gridContacts.EndUpdate(); gridContacts.SetSelected(0, true); //Force a selection. #endregion break; } #endregion if (gridContacts.Tag != null) //Already initialized { return; } //When the text box losses focus, we close/hide the grid. //TextBox_LostFocus event fires after the EmailAuto_Click event. textBox.Leave += TextBox_LostFocus; #region Grid Init gridContacts.HeaderHeight = 0; gridContacts.SelectionMode = GridSelectionMode.MultiExtended; gridContacts.MouseClick += EmailAuto_Click; gridContacts.Tag = textBox; gridContacts.TitleHeight = 0; gridContacts.Parent = this; gridContacts.BringToFront(); Point menuPosition = textBox.Location; menuPosition.X += 10; menuPosition.Y += textBox.Height - 1; gridContacts.Location = menuPosition; gridContacts.Width = (int)(textBox.Width * 0.75); gridContacts.SetSelected(0, true); #endregion gridContacts.Show(); }
private void DropDownToggle() { if (DroppedDown) //DroppedDown, so we need to collapse. { if (_doUsePopup) { _popup.Close(); //This collapses the popup. The popup is NOT disposed. } else { gridMain.Visible = false; } FillText(); if (SelectionChangeCommitted != null) { SelectionChangeCommitted(this, new EventArgs()); } } else //Not DroppedDown, so we need to DropDown. { #region Popup setup //If the grid rows differ from the items count, refill the grid because something happened to the ArrayList that the control wasn't aware of. //For example, If a ComboBoxMulti never sets an item selected, the grid is never filled, even though the ArrayList has items in it. //Filling the grid when opening the dropdown matches the UI behavior found in regular combo boxes. SynchronizeGrid(); Control parent = Parent; int x = this.Location.X; int y = this.Location.Y; while (parent != null && !typeof(Form).IsAssignableFrom(parent.GetType())) { x += parent.Location.X; y += parent.Location.Y; parent = parent.Parent; } if (_doUsePopup) { _popup = new PopupWindow(gridMain); _popup.AutoClose = false; //This prevents the Alt key from collapsing the combobox and prevents other events from collapsing as well. _popup.Closed += PopupWindow_Closed; _popup.Opened += PopupWindow_Opened; #endregion Popup setup _popup.Show(ParentForm, new Point(x, y + this.Height)); } else { int gridTop = y + this.Height; if (gridTop + gridMain.Height >= ParentForm.ClientSize.Height) { //The grid does not have enough room to fit on the form. if (y > ParentForm.ClientSize.Height - gridTop) { //If there's more room, put the grid above the combobox. gridTop = y - gridMain.Height; if (gridTop < 0) { //Not enough room, shrink the grid height. gridMain.Height = y; gridTop = 0; } } else { //If there's not enough room to show the grid below, shrink the grid height. gridMain.Height = ParentForm.ClientSize.Height - gridTop; } } gridMain.Location = new Point(x, gridTop); gridMain.Anchor = this.Anchor; ParentForm.Controls.Add(gridMain); gridMain.Visible = true; gridMain.BringToFront(); } } //The keyboard listener lifetime begins on first dropdown and ends when the control is disposed or parent form is closed. if (_threadCheckKeyboard == null) { //When DroppedDown, will update input flags for auto collapsing. _threadCheckKeyboard = new ODThread(100, WorkerThread_KeyboardListener); _threadCheckKeyboard.AddExceptionHandler((ex) => ex.DoNothing()); _threadCheckKeyboard.Start(); } }