EditSample1 (C#)
This sample demonstrates cell editing with edit controls and combo boxes.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Reflection;
using Softelvdm.SftTreeNET;
using Softelvdm.Controls;
namespace WindowsApplication1 {
public partial class EditSample1 : Form {
public EditSample1() {
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e) {
// This sample demonstrates cell editing using edit controls and combo boxes.
// To prepare for this sample, create a new project with a blank form and add
// a SftTree/NET control named sftTree1.
// In addition, add a textbox named textbox1 and a combo box named comboBox1.
sftTree1.Initializing = true;
sftTree1.Columns.Count = 3;
for (int i = 0 ; i < 100 ; ++i) {
ItemClass item = sftTree1.ItemCollection.Add(new string[] {"Can't", "Text", "Combo"} );
}
sftTree1.Columns.MakeOptimal(0, false);
sftTree1.RecalcHorizontalExtent();
sftTree1.Initializing = false;
}
private void sftTree1_EditAllowed(object sender, Softelvdm.SftTreeNET.EditAllowedEventArgs e) {
Debug.Write("** EditAllowed");
DumpValues(e);
if (e.Cell.ColumnIndex == 0) // Can't edit the first column
e.Allowed = false;
}
private void sftTree1_EditSetup(object sender, Softelvdm.SftTreeNET.EditSetupEventArgs e) {
Debug.Write("** EditSetup");
DumpValues(e);
if (e.Cell.ColumnIndex == 1) {
// We use a textbox for column 1 (remember, column 0 is not editable,
// because of the EditAllowed event
// set all textbox properties
textBox1.Parent = sftTree1; // make the tree control the parent window
textBox1.Text = e.Cell.Text;
int h = textBox1.Height;
Rectangle r = e.rCell;
// limit the control to the left (and only) pane
r.Intersect(sftTree1.Splitter.Left.ItemsArea);
int vOffs = (r.Size.Height - textBox1.Height) / 2;
textBox1.Location = new Point(r.Location.X, r.Location.Y + vOffs);
textBox1.Width = r.Width;
// make it visible and enable it
textBox1.Enabled = true;
textBox1.Visible = true;
// off we go!
textBox1.BringToFront();
textBox1.Focus();
e.EditControl = textBox1;
} else if (e.Cell.ColumnIndex == 2) {
// We use a combobox for column 2
comboBox1.Parent = sftTree1;
comboBox1.Items.Clear();
comboBox1.Items.AddRange(new string[] { "Selection 1", "Selection 2", "Selection 3", "Selection 4", "Selection 5" });
comboBox1.Text = e.Cell.Text;
int h = comboBox1.Height;
Rectangle r = e.rCell;
// limit the control to the left (and only) pane
r.Intersect(sftTree1.Splitter.Left.ItemsArea);
int vOffs = (r.Size.Height - comboBox1.Height) / 2;
comboBox1.Location = new Point(r.Location.X, r.Location.Y + vOffs);
comboBox1.Width = r.Width;
// make it visible and enable it
comboBox1.Enabled = true;
comboBox1.Visible = true;
// off we go!
comboBox1.BringToFront();
comboBox1.Focus();
e.EditControl = comboBox1;
}
}
private void sftTree1_EditValidate(object sender, EditValidateEventArgs e) {
if (e.EditControl is TextBox) {
if (textBox1.Text == "") { // you MUST enter something
e.Valid = false;
MessageBox.Show("Cell text can't be empty in this example.");
}
} else if (e.EditControl is ComboBox) {
if (comboBox1.Text == "") { // you MUST select something
e.Valid = false;
MessageBox.Show("Cell text can't be empty in this example.");
}
}
}
private void sftTree1_EditEnded(object sender, Softelvdm.SftTreeNET.EditEndedEventArgs e) {
if (e.EditControl is TextBox) {
// save the new cell text if neccessary
if (e.SaveValue)
e.Cell.Text = textBox1.Text;
// hide the text box and make the form the control's parent
textBox1.Visible = false;
textBox1.Enabled = false;
textBox1.Parent = sftTree1.Parent;
} else if (e.EditControl is ComboBox) {
// save the new cell text if neccessary
if (e.SaveValue)
e.Cell.Text = comboBox1.Text;
// hide the text box and make the form the control's parent
comboBox1.Visible = false;
comboBox1.Enabled = false;
comboBox1.Parent = sftTree1.Parent;
}
Debug.Write("** EditEnded");
DumpValues(e);
}
private void sftTree1_ItemClick(object sender, Softelvdm.SftTreeNET.ItemClickEventArgs e) {
Debug.Write("** ItemClick");
DumpValues(e);
if (e.Area == Softelvdm.SftTreeNET.ItemClickAreaEnum.CellSel)
e.Cell.Edit(); // Start cell editing
}
// Handle all the cell navigation for the text box here
private void textBox1_KeyDown(object sender, KeyEventArgs e) {
if (e.KeyCode == Keys.Up) {
sftTree1.EditNavigate(EditNavigateEnum.Up);
e.Handled = true;
} else if (e.KeyCode == Keys.Down) {
sftTree1.EditNavigate(EditNavigateEnum.Down);
e.Handled = true;
} else if (e.KeyCode == Keys.Left && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Left
sftTree1.EditNavigate(EditNavigateEnum.Left);
e.Handled = true;
} else if (e.KeyCode == Keys.Right && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Right
sftTree1.EditNavigate(EditNavigateEnum.Right);
e.Handled = true;
} else if (e.KeyCode == Keys.Home && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Home
sftTree1.EditNavigate(EditNavigateEnum.Home);
e.Handled = true;
} else if (e.KeyCode == Keys.End && (e.Modifiers & Keys.Control) != 0) { // Ctrl+End
sftTree1.EditNavigate(EditNavigateEnum.End);
e.Handled = true;
} else if (e.KeyCode == Keys.Tab && (e.Modifiers & Keys.Shift) != 0) { // Shift+Tab
sftTree1.EditNavigate(EditNavigateEnum.Left);
e.Handled = true;
} else if (e.KeyCode == Keys.Tab && (e.Modifiers & Keys.Shift) == 0) { // Tab
sftTree1.EditNavigate(EditNavigateEnum.Right);
e.Handled = true;
} else if (e.KeyCode == Keys.Escape) { // ESC
sftTree1.EndEdit(false);
e.Handled = true;
} else if (e.KeyCode == Keys.Return) { // Return
sftTree1.EndEdit(true);
e.Handled = true;
}
}
// Textboxes normally don't want Tab and Escape keys, so we enable these here
private void textBox1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) {
if (e.KeyCode == Keys.Tab)
e.IsInputKey = true;
else if (e.KeyCode == Keys.Escape)
e.IsInputKey = true;
}
private void comboBox1_KeyDown(object sender, KeyEventArgs e) {
if (e.KeyCode == Keys.Up && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Up
sftTree1.EditNavigate(EditNavigateEnum.Up);
e.Handled = true;
} else if (e.KeyCode == Keys.Down && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Down
sftTree1.EditNavigate(EditNavigateEnum.Down);
e.Handled = true;
} else if (e.KeyCode == Keys.Left && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Left
sftTree1.EditNavigate(EditNavigateEnum.Left);
e.Handled = true;
} else if (e.KeyCode == Keys.Right && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Right
sftTree1.EditNavigate(EditNavigateEnum.Right);
e.Handled = true;
} else if (e.KeyCode == Keys.Home && (e.Modifiers & Keys.Control) != 0) { // Ctrl+Home
sftTree1.EditNavigate(EditNavigateEnum.Home);
e.Handled = true;
} else if (e.KeyCode == Keys.End && (e.Modifiers & Keys.Control) != 0) { // Ctrl+End
sftTree1.EditNavigate(EditNavigateEnum.End);
e.Handled = true;
} else if (e.KeyCode == Keys.Tab && (e.Modifiers & Keys.Shift) != 0) { // Shift+Tab
sftTree1.EditNavigate(EditNavigateEnum.Left);
e.Handled = true;
} else if (e.KeyCode == Keys.Tab && (e.Modifiers & Keys.Shift) == 0) { // Tab
sftTree1.EditNavigate(EditNavigateEnum.Right);
e.Handled = true;
} else if (e.KeyCode == Keys.Escape && !comboBox1.DroppedDown) { // ESC (only if dropdown is not showing)
sftTree1.EndEdit(false);
e.Handled = true;
} else if (e.KeyCode == Keys.Return && !comboBox1.DroppedDown) { // Return (only if dropdown is not showing)
sftTree1.EndEdit(true);
e.Handled = true;
}
}
// Comboboxes normally don't want Tab and Escape keys, so we enable these here
private void comboBox1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) {
if (e.KeyCode == Keys.Tab)
e.IsInputKey = true;
else if (e.KeyCode == Keys.Escape && !comboBox1.DroppedDown) // (only if dropdown is not showing)
e.IsInputKey = true;
}
// This is a small helper routine to show all properties and fields of an object
private void DumpValues(object o) {
PropertyInfo[] api = o.GetType().GetProperties();
foreach (PropertyInfo pi in api)
Debug.Write(" " + pi.Name + " " + pi.GetValue(o, new object[] ));
FieldInfo[] afi = o.GetType().GetFields();
foreach (FieldInfo fi in afi)
Debug.Write(" " + fi.Name + " " + fi.GetValue(o));
Debug.WriteLine("");
}
}
}
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