protected override void OnPaint(PaintEventArgs pe)
{
pe.Graphics.FillRectangle(Brushes.White, this.ClientRectangle);
int startPoint = -(offsetPosition % ItemDirectionalSize);
Rectangle area = new Rectangle();
for (int index = offsetPosition / ItemDirectionalSize;
startPoint < OffsetPosition + DirectionSize;
index++)
{
System.Diagnostics.Debug.WriteLine(index);
if (HorizontalMode)
{
area = new Rectangle(startPoint, 0, ItemDirectionalSize, this.Height);
if (DrawItemHorizontal != null)
{
DrawItemHorizontal.Invoke(this, new DrawItemEventArgs(
pe.Graphics, this.Font,
area, index, SelectedIndex == index ? DrawItemState.Selected : DrawItemState.None));
}
}
else
{
area = new Rectangle(0, startPoint, this.Width, ItemDirectionalSize);
if (DrawItem != null)
{
DrawItem.Invoke(this, new DrawItemEventArgs(
pe.Graphics, this.Font,
area, index, SelectedIndex == index ? DrawItemState.Selected : DrawItemState.None));
}
}
startPoint += ItemDirectionalSize;
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (graphics == null)
{
return;
}
graphics.Clear(BackColor);
graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
// Draw items via user-code
if (DrawItem != null)
{
if (Items != null)
{
for (int i = 0; i < Items.Count; i++)
{
int yPos = (i * (rowHeight + rowDistance)) + scrollAmount + rowDistance;
if (yPos >= -rowHeight && yPos < this.Height)
{
DrawItem?.Invoke(i == selected ? DrawItemState.Selected : DrawItemState.Default, graphics, i, GetItemBounds(i));
}
}
}
}
else // Draw default items
{
if (Items != null)
{
for (int i = 0; i < Items.Count; i++)
{
int yPos = (i * (rowHeight + rowDistance)) + scrollAmount + rowDistance;
if (yPos >= -rowHeight && yPos < this.Height)
{
OnDrawItem(i == selected ? DrawItemState.Selected : DrawItemState.Default, graphics, i, GetItemBounds(i));
}
}
}
}
e.Graphics.DrawImageUnscaled(buffer, Point.Empty);
}
private void OnDrawItem(object sender, DrawItemEventArgs e)
{
DrawItem?.Invoke(this, e);
}
/// <summary>
/// Raises the <see cref="E:DrawItem"/> event.
/// </summary>
/// <param name="e">The <see cref="DrawStepListItemEventArgs"/> instance containing the event data.</param>
protected virtual void OnDrawItem(DrawStepListItemEventArgs e)
{
DrawItem?.Invoke(this, e);
}
private void Listbox_DrawItem(object sender, DrawItemEventArgs e)
{
DrawItem?.Invoke(sender, e);
}