First off, you have to make sure you tell it you’re using Xojo API 2.0. Tell it you’re using a DesktopListBox. Then if in doubt, copy and paste the entire page from documentation.xojo.com for the DesktopListbox into the prompt following your question.
Here’s a query I might give it:
I’m writing code in Xojo API 2.0. I would like to change the text formatting in my cells in a DesktopListBox in column 2 and row 4. Please write me a sample method that will populate an empty DesktopListbox with data and change the font as specified to Times New Roman in red. For your reference, here is the documentation for DesktopListBox:
—paste docs here—
Most of the time it will get you most of the way there. It loves to use the old .Append instead of .Add to create a new array element, look out for that one. It also mixes up 0 and 1 based string functions fairly often, so double check that as well.
Edit: In this particular instance, the DesktopListbox docs were too long to paste in one go. So here’s what I did: First chat:
I’m writing code in Xojo API 2.0. I’m going to paste you the documentation for the Xojo DesktopListbox class in two halves. Don’t do anything het, here’s the first half, just confirm your receipt and understanding:
—paste here—
It replies:
I have received and understood the first half of the documentation for the Xojo DesktopListBox class. Please proceed with the second half.
I continue:
Below is the rest of the documentation for DesktopListBox. I would like to change the text formatting in my cells in a DesktopListBox in column 2 and row 4. Please write me sample code that will populate an empty DesktopListbox with data and change the font as specified to Times New Roman in red.
—paste here—
It proceeds to tell me to create a DesktopListBox called listBox1 and use the following two methods:
Sub Opening() Handles Opening
listBox1.ColumnCount = 3
listBox1.HasHeader = True
listBox1.HeaderAt(0) = "Column 1"
listBox1.HeaderAt(1) = "Column 2"
listBox1.HeaderAt(2) = "Column 3"
// Populating the ListBox with some sample data
For i As Integer = 0 To 10
listBox1.AddRow("Row " + i.ToString)
listBox1.CellTextAt(listBox1.LastAddedRowIndex, 1) = "Data in Column 2, Row " + i.ToString
listBox1.CellTextAt(listBox1.LastAddedRowIndex, 2) = "Data in Column 3, Row " + i.ToString
Next
End Sub
Function PaintCellText(g as Graphics, row as Integer, column as Integer, x as Integer, y as Integer) Handles PaintCellText as Boolean
// Changing the font in cell (row 4, column 2) to Times New Roman in red
If row = 4 And column = 1 Then
g.FontName = "Times New Roman"
g.FontSize = 12
g.DrawingColor = Color.Red
g.DrawText(listBox1.CellTextAt(row, column), x, y)
Return True
End If
Return False
End Function
These work, but they only change the color/font in Row4 Col2, not the entire Column 2 and entire Row 4 as I had anticipated. So it got me most of the way there, but I have to adjust the logic a bit. Also it technically changed column 1, again mixing up the 0 and 1 base.