/// <summary>
/// Processes the flags on check state changed. Include this method in the event handler for ItemCheckStateChanged.
/// </summary>
/// <param name="item">The item that was changed.</param>
public void ProcessFlagsOnCheckStateChanged <T>(CheckBoxListItem item) where T : struct, IConvertible
{
IsValidEnum <T>();
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
bool set = item.Checked;
T newVal = GetFlagsValue <T>(Activator.CreateInstance <T>());
for (int i = 0; i < items.Count; i++)
{
CheckBoxListItem curItem = items[i];
bool changed = false;
if (set && (EnumHasValue <T>(newVal, curItem.Tag) || EnumHasValue <T>(curItem.Tag, item.Tag)) && !curItem.Checked)
{
curItem.Checked = true;
changed = true;
}
if (!set && EnumHasValue <T>(curItem.Tag, item.Tag) && curItem.Checked)
{
curItem.Checked = false;
changed = true;
}
if (changed)
{
InvalidateItem(i);
}
}
}
/// <summary>
/// Paints the button.
/// </summary>
/// <param name="g">A <see cref="Graphics" /> reference.</param>
/// <param name="index">The index of the item.</param>
/// <param name="bounds">The bounds in which to paint the item.</param>
protected override void PaintButton(Graphics g, int index, Rectangle bounds)
{
CheckBoxListItem li = BaseItems[index] as CheckBoxListItem;
// Get current state
CheckBoxState curState = (CheckBoxState)(((int)li.CheckState * 4) + 1);
if (!Enabled || !li.Enabled)
{
curState += 3;
}
else if (index == PressingItem)
{
curState += 2;
}
else if (index == HoverItem)
{
curState++;
}
// Draw glyph
Microsoft.Win32.NativeMethods.BufferedPaint.Paint <CheckBoxState, CheckBoxListItem>(g, this, bounds, PaintAnimatedButton, lastState, curState, GetTransition(curState, lastState), li);
lastState = curState;
}
/// <summary> /// Determines whether the specified <see cref="CheckBoxListItem"/> is equal to the current <see cref="CheckBoxListItem"/>. /// </summary> /// <param name="other">The <see cref="CheckBoxListItem"/> to compare with the current <see cref="CheckBoxListItem"/>.</param> /// <returns> /// true if the specified <see cref="CheckBoxListItem"/> is equal to the current <see cref="CheckBoxListItem"/>; otherwise, false. /// </returns> public bool Equals(CheckBoxListItem other) => base.Equals((ButtonListItem)other) && CheckState == other.CheckState;
/// <summary>
/// Initializes a new instance of the <see cref="CheckBoxListItemCheckStateChangedEventArgs" /> class.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="index">The index.</param>
public CheckBoxListItemCheckStateChangedEventArgs(CheckBoxListItem item, int index)
{
Item = item;
ItemIndex = index;
}
private void PaintAnimatedButton(Graphics g, Rectangle bounds, CheckBoxState curState, CheckBoxListItem li)
{
Point gp = li.GlyphPosition;
gp.Offset(bounds.Location);
CheckBoxRenderer.DrawCheckBox(g, gp, curState);
}