C#

PIEBALDconsult wrote:

I really need to write an article on XPath...

void listBox_DrawItem(object sender, DrawItemEventArgs e)
{
    Color drawColor = GetColorFromItem(e.Index);
    ..... 
}

void listBox_DrawItem(object sender, DrawItemEventArgs e)
        {
            if (e.Index > -1)
            {
                if (globalFlag == "red")
                    e.Graphics.FillRectangle(Brushes.Red, e.Bounds);
                else if (globalFlag  == "green")
                    e.Graphics.FillRectangle(Brushes.Green, e.Bounds);
                else
                    e.DrawBackground();
                using (Brush textBrush = new SolidBrush(e.ForeColor))
                {
                    e.Graphics.DrawString(lbxOutput.Items[e.Index].ToString(), e.Font, textBrush, e.Bounds.Location);
                }
            }
        }

turbosupramk3 wrote:

to function properly

turbosupramk3 wrote:

Any ideas on how to get around this limitation?

public string globalFlag = "";
public string globalListBoxText = "";


private void someFunction()
{
    //set globalFlag to color

   // set globalListBoxText to string to write to listbox

   // call eventhandler
}



void listBox_DrawItem(object sender, DrawItemEventArgs e)
        {
            if (e.Index > -1)
            {
                if (globalFlag == "red")
                    e.Graphics.FillRectangle(Brushes.Red, e.Bounds);
                else if (globalFlag  == "green")
                    e.Graphics.FillRectangle(Brushes.Green, e.Bounds);
                else
                    e.DrawBackground();
                using (Brush textBrush = new SolidBrush(e.ForeColor))
                {
                    e.Graphics.DrawString(lbxOutput.Items[e.Index].ToString(), e.Font, textBrush, e.Bounds.Location);
                }
            }
        }

private string GetColorForItem( int Index )
{
   // return correct color name
}

private string GetStringForItem( int Index )
{
   // return correct string
}

void listBox_DrawItem(object sender, DrawItemEventArgs e)
        {
            if (e.Index > -1)
            {
                string colorToUse = GetColorForItem(e.Index);
                string textToUse = GetStringForItem(e.Index);

                if (colorToUse == "red")
                    e.Graphics.FillRectangle(Brushes.Red, e.Bounds);
                else if (colorToUse  == "green")
                    e.Graphics.FillRectangle(Brushes.Green, e.Bounds);
                else
                    e.DrawBackground();
                
                using (Brush textBrush = new SolidBrush(e.ForeColor))
                {
                    e.Graphics.DrawString(textToUse, e.Font, textBrush, e.Bounds.Location);
                }
            }
        }

public FormMain()
        {
            InitializeComponent();
            listBox.DrawMode = DrawMode.OwnerDrawFixed;
            listBox.DrawItem += new DrawItemEventHandler(listBox_DrawItem);
            listBox.Items.AddRange(new object[] { "A", "B", "C" });
        }

Quote:

private string GetColorForItem( int Index )
{
// return correct color name
}

private string GetStringForItem( int Index )
{
// return correct string
}

void listBox_DrawItem(object sender, DrawItemEventArgs e)
{
if (e.Index > -1)
{
string colorToUse = GetColorForItem(e.Index);
string textToUse = GetStringForItem(e.Index);

if (colorToUse == "red")
e.Graphics.FillRectangle(Brushes.Red, e.Bounds);
else if (colorToUse == "green")
e.Graphics.FillRectangle(Brushes.Green, e.Bounds);
else
e.DrawBackground();

using (Brush textBrush = new SolidBrush(e.ForeColor))
{
e.Graphics.DrawString(textToUse, e.Font, textBrush, e.Bounds.Location);
}
}
}

class ColouredLine {
 string Text;
 Color Color;
}

void fillListBox(){
 myListBox.Items.Add(new ColouredLine("Liverpool", Color.Red));
 myListBox.Items.Add(new ColouredLine("Everton", Color.Blue));
 // ... etc
}

void listBox_DrawItem(object sender, DrawItemEventArgs e){
 if(e.Index < 0) return;

 ColouredLine line = (ColouredLine)myListBox.Items[e.Index];
 e.Graphics.FillRectangle(new SolidBrush(line.Color), e.Bounds);
 e.Grapics.DrawString(line.Text, e.Font, new SolidBrush(e.ForeColor), e.Bounds.Location);
}

private void testFunction()
{
    try
    {


        LineEditor lineEditor = new LineEditor();
        lbxOutput.Controls.Add(lineEditor);
        lineEditor.ShowSelection = false;
        lineEditor.BottomAligned = false;
        lineEditor.Selectable = false;



        lineEditor.Lines.Add(new Line(Color.Red, "Liverpool"));
        lineEditor.Lines.Add(new Line(Color.Red, "Another test2"));
        lineEditor.Lines.Add(new Line(Color.Green, "Another test3"));
        lineEditor.Lines.Add(new Line(Color.Black, "Another test4"));
        lineEditor.Lines.Add(new Line(Color.Orange, "Another test5"));
         //remember to set Editable to true
        lineEditor.Lines.Add(new EditableLine(Color.Green, "Editable text"));
        lineEditor.Lines.Insert(new Line(Color.Black, "At the front"), 0);

    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message + " " + ex.StackTrace + " " + ex.Source);
    }
}

public class MyListBoxItem
{
    public MyListBoxItem(Color t, string m, Color c)
    {
        BackgroundColor = c;
        Message = m;
        TextColor = t;
    }
    public Color BackgroundColor { get; set; }
    public string Message { get; set; }
    public Color TextColor { get; set; }
}


private void testFunction()
{
    try
    {
        lbxOutput.DrawMode = DrawMode.OwnerDrawFixed;
        lbxOutput.DrawItem += new DrawItemEventHandler(listBox_DrawItem);

        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Validated data successfully", Color.Green));
        lbxOutput.Items.Add(new MyListBoxItem(Color.Black, "Failed to validate data", Color.Red));

   }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message + " " + ex.StackTrace + " " + ex.Source);
    }
}

private void listBox_DrawItem(object sender, DrawItemEventArgs e)
{
    MyListBoxItem item = lbxOutput.Items[e.Index] as MyListBoxItem; // Get the current item and cast it to MyListBoxItem
    Graphics g = e.Graphics;
    if (item != null)
    {
        g.FillRectangle(new SolidBrush(item.BackgroundColor), e.Bounds); // Draw this first, so you can draw over it with the text
        e.Graphics.DrawString( // Draw the appropriate text in the ListBox
            item.Message, // The message linked to the item
            lbxOutput.Font, // Take the font from the listbox
            //new SolidBrush(item.ItemColor), // Set the color
            new SolidBrush(item.TextColor), // Set the color
            0, // X pixel coordinate
            e.Index * lbxOutput.ItemHeight // Y pixel coordinate.  Multiply the index by the ItemHeight defined in the listbox.
        );
        //e.DrawBackground();
        //Graphics g = e.Graphics;

    }
    else
    {
        // The item isn't a MyListBoxItem, do something about it
    }
}