/// <summary>
/// This method will change the currentItem field once a new item is selected
/// </summary>
protected override void OnSelectedIndexChanged(EventArgs e)
{
if (SelectedIndex >= 0)
{
m_currentItem = SelectedItem as LookInComboBoxItem;
}
base.OnSelectedIndexChanged(e);
}
/// <summary>
/// This method will draw the items of the DropDownList. It will draw the icon, the text and
/// with the indent that goes with the item
/// </summary>
private void ComboBox_DrawItem(object sender, DrawItemEventArgs e)
{
if (e.Index == -1) // The combo box contains no items and the item is the editing portion
{
if (m_currentItem == null)
{
return;
}
Brush backBrush = new SolidBrush(SystemColors.Window);
e.Graphics.FillRectangle(backBrush, e.Bounds);
backBrush.Dispose();
int imageYOffset = (e.Bounds.Height - m_currentItem.Icon.Height) / 2;
Point imagePoint = new Point(
e.Bounds.Left + 2,
e.Bounds.Top + imageYOffset);
Size textSize = TextRenderer.MeasureText(m_currentItem.Text, e.Font);
int textYOffset = (e.Bounds.Height - textSize.Height) / 2;
Point textPoint = new Point(
e.Bounds.Left + m_currentItem.Icon.Width + 5,
e.Bounds.Top + textYOffset);
textSize.Height += textYOffset;
Rectangle textRect = new Rectangle(textPoint, textSize);
bool selected = ((e.State & DrawItemState.Selected) == DrawItemState.Selected);
if (selected)
{
Brush selectedBrush = new SolidBrush(SystemColors.Highlight);
e.Graphics.FillRectangle(selectedBrush, textRect);
selectedBrush.Dispose();
}
if (((e.State & DrawItemState.Focus) == DrawItemState.Focus) && ((e.State & DrawItemState.NoFocusRect) != DrawItemState.NoFocusRect))
{
ControlPaint.DrawFocusRectangle(e.Graphics, textRect, e.ForeColor, e.BackColor);
}
e.Graphics.DrawIcon(selected ? m_currentItem.SelectedIcon : m_currentItem.Icon, imagePoint.X, imagePoint.Y);
TextRenderer.DrawText(e.Graphics, m_currentItem.Text, e.Font, textPoint, e.ForeColor);
}
else
{
LookInComboBoxItem item = (LookInComboBoxItem)Items[e.Index];
Brush backBrush = new SolidBrush(SystemColors.Window);
e.Graphics.FillRectangle(backBrush, e.Bounds);
backBrush.Dispose();
int indentOffset = m_indentWidth * item.Indent;
if ((e.State & DrawItemState.ComboBoxEdit) == DrawItemState.ComboBoxEdit)
{
indentOffset = 0;
}
int imageYOffset = (e.Bounds.Height - item.Icon.Height) / 2;
Point imagePoint = new Point(
e.Bounds.Left + indentOffset + 2,
e.Bounds.Top + imageYOffset);
Size textSize = TextRenderer.MeasureText(item.Text, e.Font);
int textYOffset = (e.Bounds.Height - textSize.Height) / 2;
Point textPoint = new Point(
e.Bounds.Left + item.Icon.Width + indentOffset + 5,
e.Bounds.Top + textYOffset);
textSize.Height += textYOffset;
Rectangle textRect = new Rectangle(textPoint, textSize);
bool selected = ((e.State & DrawItemState.Selected) == DrawItemState.Selected);
if (selected)
{
Brush selectedBrush = new SolidBrush(SystemColors.Highlight);
e.Graphics.FillRectangle(selectedBrush, textRect);
selectedBrush.Dispose();
}
if (((e.State & DrawItemState.Focus) == DrawItemState.Focus) && ((e.State & DrawItemState.NoFocusRect) != DrawItemState.NoFocusRect))
{
ControlPaint.DrawFocusRectangle(e.Graphics, textRect, e.ForeColor, e.BackColor);
}
e.Graphics.DrawIcon(selected ? item.SelectedIcon : item.Icon, imagePoint.X, imagePoint.Y);
TextRenderer.DrawText(e.Graphics, item.Text, e.Font, textPoint, e.ForeColor);
}
}