protected void ComputeTypeButtonsNeeded(List <ListItem> listItems)
{
// set the type buttons needed
if (TypeImages == null)
{
TypeImages = new Dictionary <int, Image>();
}
else
{
TypeImages.Clear();
}
if (TypeText == null)
{
TypeText = new Dictionary <int, string>();
}
else
{
TypeText.Clear();
}
_typeList.Clear();
foreach (var item in listItems.Cast <FilteredTypeListItem>().Where(item => item.ItemType >= 0))
{
if (!TypeImages.ContainsKey(item.ItemType))
{
_typeList.Add(item.ItemType);
TypeImages.Add(item.ItemType, item.ItemTypeImage);
TypeText.Add(item.ItemType, item.ItemTypeText);
}
}
}
/// <summary>
/// Overriding DrawButtons to add the Type selector buttons
/// </summary>
protected override void DrawButtons()
{
base.DrawButtons();
if (BottomHeight == 0)
{
return;
}
int maxWidthForTypeButtons = Width - BottomPadding * 3 - _itemsNbLabelWidth - 10;
_nbDisplayableTypeButton = (int)Math.Floor((decimal)maxWidthForTypeButtons / TypeButtonWidth);
_nbDisplayableTypeButton = _nbDisplayableTypeButton.ClampMax(_typeList.Count);
var buttonsToDisplay = _typeList.Count;
// for each distinct type of items, create the buttons
int xPos = BottomPadding;
int nBut = 0;
foreach (var type in _typeList)
{
// new type, add a button for it
if (!_typeButtons.ContainsKey(type))
{
_typeButtons.Add(type, new SelectorButton {
Size = new Size(TypeButtonWidth, DefaultBottomHeight),
TabStop = false,
AcceptsAnyClick = true,
HideFocusedIndicator = true,
Activated = true,
BackGrndImage = TypeImages.ContainsKey(type) ? TypeImages[type] : null
});
_typeButtons[type].ButtonPressed += HandleTypeClick;
_tooltip.SetToolTip(_typeButtons[type], (TypeText.ContainsKey(type) && TypeText[type] != null ? TypeText[type] + "<br>" : "") + TypeButtonTooltipText);
}
_typeButtons[type].Anchor = AnchorStyles.Left | AnchorStyles.Bottom;
_typeButtons[type].Type = type;
_typeButtons[type].Activated = _typeButtons[type].Activated;
_typeButtons[type].Location = new Point(xPos, Height - BottomHeight / 2 - _typeButtons[type].Height / 2);
nBut++;
// show as many button as we can show - 1
if (nBut < _nbDisplayableTypeButton || buttonsToDisplay == _nbDisplayableTypeButton)
{
xPos += TypeButtonWidth;
if (!Controls.Contains(_typeButtons[type]))
{
Controls.Add(_typeButtons[type]);
}
}
else
{
if (Controls.Contains(_typeButtons[type]))
{
Controls.Remove(_typeButtons[type]);
}
}
}
// remove buttons that are no longer used
var tmpDic = new Dictionary <int, SelectorButton>();
foreach (int key in _typeButtons.Keys)
{
if (!_typeList.Contains(key))
{
if (Controls.Contains(_typeButtons[key]))
{
Controls.Remove(_typeButtons[key]);
}
}
else
{
tmpDic.Add(key, _typeButtons[key]);
}
}
_typeButtons = tmpDic;
if (nBut > 0 && buttonsToDisplay > _nbDisplayableTypeButton)
{
// we display a "more button" that opens a small interface to show the extra buttons
if (_moreButton == null)
{
_moreButton = new SelectorButton {
BackGrndImage = MoreTypesImage ?? Resources.Resources.More,
Activated = true,
Size = new Size(TypeButtonWidth, DefaultBottomHeight),
TabStop = false,
Anchor = AnchorStyles.Left | AnchorStyles.Bottom,
HideFocusedIndicator = true
};
_moreButton.ButtonPressed += HandleMoreTypeClick;
_tooltip.SetToolTip(_moreButton, MoreButtonTooltipText);
}
_moreButton.Location = new Point(xPos, Height - BottomHeight / 2 - _moreButton.Height / 2);
if (!Controls.Contains(_moreButton))
{
Controls.Add(_moreButton);
}
}
else
{
// if we have enough space to display the last button, hide the more button
// remove the more button if it exists
if (_moreButton != null)
{
if (Controls.Contains(_moreButton))
{
Controls.Remove(_moreButton);
}
}
}
}