PartsSample3 (C#)
This sample demonstrates cell images, cell tags, column reordering, sorting and sorting indicators in column headers.
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 System.Collections;
using Softelvdm.SftTreeNET;
using Softelvdm.Controls;
namespace WindowsApplication1 {
public partial class PartsSample3 : Form {
public PartsSample3() {
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e) {
// This sample demonstrates how sorting indicators could be used in column headers.
// To prepare for this sample, create a new project with a blank form and add
// a SftTree/NET control named sftTree1.
// In addition, adjust the following FromFile method to use a (small) bitmap
// that is located on your system.
Image img = Bitmap.FromFile("..\\..\\test.gif");
// Most of this initialization code could be eliminated by designing the control.
sftTree1.Initializing = true;
sftTree1.Columns.Count = 4;
for (int c = 0 ; c < sftTree1.Columns.Count ; ++c) {
CellClass cell = sftTree1.Headers[0, c]; // access each header cell
cell.Text = "Column " + c.ToString(); // set the title
if (c == 1)
cell.Image = img; // add an image to a random column header
cell.SortIndicatorPosition = SortIndicatorPositionEnum.Default;
}
sftTree1.ItemClick += new SftTree.ItemClickEventHandler(sftTree1_ItemClick);
sftTree1.ItemDoubleClick += new SftTree.ItemDoubleClickEventHandler(sftTree1_ItemDoubleClick);
// Add a few items
ItemClass item = sftTree1.ItemCollection.Add(new string [] { "Text 1", "Data 4", "44", "31" } );
item.Cells[2].TagObject = (long) 44; // we use the actual number for sorting, not the string
item.Cells[3].TagObject = (long) 31;
item = sftTree1.ItemCollection.Add(new string[] { "Text 2", "Data 2", "22", "28" });
item.Cells[2].TagObject = (long) 22; // we use the actual number for sorting, not the string
item.Cells[3].TagObject = (long) 28;
item.Cells[3].Image = img; // add an image to a random cell
item = sftTree1.ItemCollection.Add(new string[] { "Text 3", "Data 43", "11", "233" });
item.Cells[2].TagObject = (long) 11; // we use the actual number for sorting, not the string
item.Cells[3].TagObject = (long) 233;
item = sftTree1.ItemCollection.Add(new string[] { "Text 4", "Data 34", "144", "551" });
item.Cells[2].TagObject = (long) 144; // we use the actual number for sorting, not the string
item.Cells[3].TagObject = (long) 551;
SetSorted(0); // remember that column 0 is (already) sorted
sftTree1.Columns.MakeOptimal(0, false);
sftTree1.RecalcHorizontalExtent();
sftTree1.Initializing = false;
}
private int m_sortedColumn = -1; // remembers the sorted column
private bool SetSorted(int column)
{
bool fAscending = true; // assume new column will be ascending
if (m_sortedColumn == column && sftTree1.Headers[0, column].SortStatus == SortStatusEnum.Ascending)
fAscending = false; // the current column is now descending
// turn off sorting indicator in all column headers
sftTree1.Headers.SetSortStatus(SortStatusEnum.NotSorted);
// now set the new sorting indicator
sftTree1.Headers[0, column].SortStatus = fAscending ? SortStatusEnum.Ascending : SortStatusEnum.Descending;
m_sortedColumn = column;
return fAscending;
}
private void SortData(ItemClickEventArgs e)
{
// sort the column last clicked
if (e.Usage != UsageLocationEnum.header) // we are not interested if the click wasn't in the header
return;
if (e.Area != ItemClickAreaEnum.Cell)
return;
bool fAscending = SetSorted(e.Cell.ColumnIndex);
switch (e.Cell.ColumnIndex) {
default: // column 0 and 1 are sorted based on the Text property
if (fAscending)
sftTree1.ItemCollection.Sort(new SortAscending(e.Cell.ColumnIndex));
else
sftTree1.ItemCollection.Sort(new SortDescending(e.Cell.ColumnIndex));
break;
case 2: case 3: // column 2 and 3 are sorted based on the TagObject property, interpreted as a long
if (fAscending)
sftTree1.ItemCollection.Sort(new SortTagObjectAsLongAscending(e.Cell.ColumnIndex));
else
sftTree1.ItemCollection.Sort(new SortTagObjectAsLongDescending(e.Cell.ColumnIndex));
break;
}
}
public sealed class SortTagObjectAsLongAscending : IComparer {
private int m_ColumnIndex;
public SortTagObjectAsLongAscending(int ColumnIndex) {
m_ColumnIndex = ColumnIndex;
}
public int Compare(object x, object y) {
ItemClass i1 = (ItemClass)x;
ItemClass i2 = (ItemClass)y;
long l1 = (long) i1.Cells[m_ColumnIndex].TagObject;
long l2 = (long) i2.Cells[m_ColumnIndex].TagObject;
if (l1 > l2) return 1;
if (l1 < l2) return -1;
return 0;
}
}
public sealed class SortTagObjectAsLongDescending : IComparer {
private int m_ColumnIndex;
public SortTagObjectAsLongDescending(int ColumnIndex) {
m_ColumnIndex = ColumnIndex;
}
public int Compare(object x, object y) {
ItemClass i1 = (ItemClass)x;
ItemClass i2 = (ItemClass)y;
long l1 = (long)i1.Cells[m_ColumnIndex].TagObject;
long l2 = (long)i2.Cells[m_ColumnIndex].TagObject;
if (l1 < l2) return 1;
if (l1 > l2) return -1;
return 0;
}
}
// ItemClick event
private void sftTree1_ItemClick(object sender, ItemClickEventArgs e) {
Debug.Write("** ItemClick");
DumpValues(e);
SortData(e);
}
private void sftTree1_ItemDoubleClick(object sender, ItemClickEventArgs e) {
Debug.Write("** ItemDoubleClick");
DumpValues(e);
SortData(e);
}
// 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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