/// <summary>Purges the ListView2 (deletes all items from display and memory). Useful when memory leaks are happen.</summary>
public void Clear()
{
Grid.Clear();
Items.Clear();
LastRow = LastCol = 0;
PointedItem = null;
}
/// <summary>Add a new ListView2Item into this ListView2</summary>
/// <param name="Item">The new ListView2Item</param>
public void AddItem(ListView2Item Item)
{
if (Color2)
{
Item.NormalBgColor = NormalBgColor2;
Item.NormalFgColor = NormalFgColor1;
}
else
{
Item.NormalBgColor = NormalBgColor1;
Item.NormalFgColor = NormalFgColor1;
}
Color2 = !Color2;
Items.Add(Item);
Grid.Add(Item, LastCol, LastRow, 1, 1, true);
Item.ButtonPressed += new EventHandler <ButtonEventArgs>(Item_ButtonPressed);
Item.CanGetFocus = true;
if (LastRow == 0)
{
_SetPoint(Item);
}
LastRow++;
Through10Counter++;
if (Through10Counter == 250)
{
Xwt.Application.MainLoop.DispatchPendingEvents();
Through10Counter = 0;
}
}
/// <summary>Selects an row</summary>
/// <param name="Item">The row or null if need to select all rows</param>
public void Select(ListView2Item Item = null)
{
if (Item != null)
{
_SelectItem(Item);
return;
}
SelectedItems.Clear();
foreach (ListView2Item lvi in Items)
{
if (lvi.State == ItemStates.Pointed || lvi.State == ItemStates.PointedAndSelected)
{
lvi.State = ItemStates.PointedAndSelected;
}
else
{
lvi.State = ItemStates.Selected;
}
SelectedItems.Add(lvi);
}
if (SelectionChanged != null)
{
SelectionChanged(SelectedItems);
}
}
/// <summary>Sets the pointer to an item</summary>
/// <param name="lvi">The requested ListView2Item</param>
private void _SetPoint(ListView2Item lvi)
{
//unpoint current
if (PointedItem != null)
{
if ((int)PointedItem.State > 1)
{
PointedItem.State = ItemStates.Selected;
}
else
{
PointedItem.State = ItemStates.Default;
}
}
//point new
if ((int)lvi.State > 1)
{
lvi.State = ItemStates.PointedAndSelected;
}
else
{
lvi.State = ItemStates.Pointed;
}
PointedItem = lvi;
if (PointerMoved != null)
{
PointerMoved(lvi);
}
//if need, scroll the view
double top = -ScrollerIn.PosY;
double down = ScrollerIn.Size.Height;
double newpos = lvi.Size.Height * lvi.RowNo;
if (top > down)
{
//если прокручено далее первой страницы
down = top + ScrollerIn.Size.Height;
}
if (newpos > down || newpos < top)
{
ScrollerIn.ScrollTo(-(lvi.Size.Height * lvi.RowNo));
}
//todo: add smooth scrolling
}
/// <summary>Removes selection of an item</summary>
/// <param name="lvi">The requested ListView2Item</param>
private void _UnselectItem(ListView2Item lvi)
{
SelectedItems.Remove(lvi);
if (lvi.State == ItemStates.PointedAndSelected)
{
lvi.State = ItemStates.Pointed;
}
else
{
lvi.State = ItemStates.Default;
}
if (SelectionChanged != null)
{
SelectionChanged(SelectedItems);
}
}
//EVENT HANDLERS
private void Item_ButtonPressed(object sender, ButtonEventArgs e)
{
this.SetFocus();
ListView2Item lvi = Items[(sender as ListView2Item).RowNo]; //вырезание гланд через жопу автогеном? уточнить лучший способ, sender не работает
//currently, the mouse click policy is same as in Total and Norton Commander
if (e.Button == PointerButton.Right) //right click - select & do nothing
{
_SelectItem(lvi);
return;
}
if (e.Button == PointerButton.Left) //left click - point & don't touch selection
{
_SetPoint(lvi);
}
}
/// <summary>Add a new item</summary>
/// <param name="Data">The item's content</param>
/// <param name="Tag">The tag for the new item (optional)</param>
public void AddItem(List <Object> Data, string Tag = null)
{
ListView2Item lvi = new ListView2Item(
LastRow,
LastCol,
Tag,
_Collumns.ToArray(),
Data);
lvi.Font = Xwt.Drawing.Font.SystemSansSerifFont.WithWeight(Xwt.Drawing.FontWeight.Heavy);
lvi.PointerBgColor = PointedBgColor;
lvi.PointerFgColor = PointedFgColor;
lvi.SelectionBgColor = SelectedBgColor;
lvi.SelectionFgColor = SelectedFgColor;
lvi.State = ItemStates.Default;
AddItem(lvi);
}
/// <summary>Clear selection of row</summary>
/// <param name="Item">The row or null if need to unselect all</param>
public void Unselect(ListView2Item Item = null)
{
if (Item == null)
{
foreach (ListView2Item lvi in SelectedItems)
{
lvi.State = ItemStates.Default;
}
SelectedItems.Clear();
}
else
{
Item.State = ItemStates.Default;
SelectedItems.Remove(Item);
}
if (SelectionChanged != null)
{
SelectionChanged(SelectedItems);
}
}
/// <summary>Inverts selection of an item</summary>
/// <param name="lvi">The requested ListView2Item</param>
private void _SelectItem(ListView2Item lvi)
{
SelectedItems.Add(lvi);
switch (lvi.State)
{
case ItemStates.Default:
lvi.State = ItemStates.Selected;
break;
case ItemStates.Pointed:
lvi.State = ItemStates.PointedAndSelected;
break;
case ItemStates.Selected:
case ItemStates.PointedAndSelected:
_UnselectItem(lvi);
break;
}
if (SelectionChanged != null)
{
SelectionChanged(SelectedItems);
}
}
/// <summary>Inverts selection of an item</summary>
/// <param name="lvi">The requested ListView2Item</param>
private void _SelectItem(ListView2Item lvi)
{
SelectedItems.Add(lvi);
switch (lvi.State)
{
case ItemStates.Default:
lvi.State = ItemStates.Selected;
break;
case ItemStates.Pointed:
lvi.State = ItemStates.PointedAndSelected;
break;
case ItemStates.Selected:
case ItemStates.PointedAndSelected:
_UnselectItem(lvi);
break;
}
if (SelectionChanged != null)
SelectionChanged(SelectedItems);
}
/// <summary>Clear selection of row</summary>
/// <param name="Item">The row or null if need to unselect all</param>
public void Unselect(ListView2Item Item = null)
{
if (Item == null)
{
foreach (ListView2Item lvi in SelectedItems)
{
lvi.State = ItemStates.Default;
}
SelectedItems.Clear();
}
else
{
Item.State = ItemStates.Default;
SelectedItems.Remove(Item);
}
if (SelectionChanged != null)
SelectionChanged(SelectedItems);
}
/// <summary>Selects an row</summary>
/// <param name="Item">The row or null if need to select all rows</param>
public void Select(ListView2Item Item = null)
{
if (Item != null){
_SelectItem(Item);
return;
}
SelectedItems.Clear();
foreach (ListView2Item lvi in Items)
{
if (lvi.State == ItemStates.Pointed || lvi.State == ItemStates.PointedAndSelected)
lvi.State = ItemStates.PointedAndSelected;
else
lvi.State = ItemStates.Selected;
SelectedItems.Add(lvi);
}
if (SelectionChanged != null)
SelectionChanged(SelectedItems);
}
/// <summary>Removes the specifed item from the list</summary>
/// <param name="Item">The item</param>
public void RemoveItem(ListView2Item Item)
{
//Note that the removing item is simply hided.
//To remove it completely, call Clear() sub-programm. But all other rows will be also removed.
Item.Visible = false;
}
/// <summary>Purges the ListView2 (deletes all items from display and memory). Useful when memory leaks are happen.</summary>
public void Clear()
{
Grid.Clear();
Items.Clear();
LastRow = LastCol = 0;
PointedItem = null;
}
/// <summary>Add a new ListView2Item into this ListView2</summary>
/// <param name="Item">The new ListView2Item</param>
public void AddItem(ListView2Item Item)
{
if (Color2){
Item.NormalBgColor = NormalBgColor2;
Item.NormalFgColor = NormalFgColor1;
}
else{
Item.NormalBgColor = NormalBgColor1;
Item.NormalFgColor = NormalFgColor1;
}
Color2 = !Color2;
Items.Add(Item);
Grid.Add(Item, LastCol, LastRow,1,1,true);
Item.ButtonPressed += new EventHandler<ButtonEventArgs>(Item_ButtonPressed);
Item.CanGetFocus = true;
if (LastRow == 0) _SetPoint(Item);
LastRow++;
Through10Counter++;
if (Through10Counter == 250)
{
Xwt.Application.MainLoop.DispatchPendingEvents();
Through10Counter = 0;
}
}
/// <summary>Add a new item</summary>
/// <param name="Data">The item's content</param>
/// <param name="Tag">The tag for the new item (optional)</param>
public void AddItem(List<Object> Data, string Tag = null)
{
ListView2Item lvi = new ListView2Item(
LastRow,
LastCol,
Tag,
_Collumns.ToArray(),
Data);
lvi.Font = Xwt.Drawing.Font.SystemSansSerifFont.WithWeight(Xwt.Drawing.FontWeight.Heavy);
lvi.PointerBgColor = PointedBgColor;
lvi.PointerFgColor = PointedFgColor;
lvi.SelectionBgColor = SelectedBgColor;
lvi.SelectionFgColor = SelectedFgColor;
lvi.State = ItemStates.Default;
AddItem(lvi);
}
/// <summary>Sets the pointer to an item</summary>
/// <param name="lvi">The requested ListView2Item</param>
private void _SetPoint(ListView2Item lvi)
{
//unpoint current
if (PointedItem != null)
{
if ((int)PointedItem.State > 1)
PointedItem.State = ItemStates.Selected;
else
PointedItem.State = ItemStates.Default;
}
//point new
if ((int)lvi.State > 1)
lvi.State = ItemStates.PointedAndSelected;
else
lvi.State = ItemStates.Pointed;
PointedItem = lvi;
if (PointerMoved != null)
PointerMoved(lvi);
//if need, scroll the view
double top = -ScrollerIn.PosY;
double down = ScrollerIn.Size.Height;
double newpos = lvi.Size.Height * lvi.RowNo;
if (top > down){
//если прокручено далее первой страницы
down = top + ScrollerIn.Size.Height;
}
if (newpos > down || newpos < top)
{
ScrollerIn.ScrollTo(-(lvi.Size.Height * lvi.RowNo));
}
//todo: add smooth scrolling
}
/// <summary>Removes the specifed item from the list</summary>
/// <param name="Item">The item</param>
public void RemoveItem(ListView2Item Item)
{
//Note that the removing item is simply hided.
//To remove it completely, call Clear() sub-programm. But all other rows will be also removed.
Item.Visible = false;
}
/// <summary>Removes selection of an item</summary>
/// <param name="lvi">The requested ListView2Item</param>
private void _UnselectItem(ListView2Item lvi)
{
SelectedItems.Remove(lvi);
if (lvi.State == ItemStates.PointedAndSelected)
lvi.State = ItemStates.Pointed;
else
lvi.State = ItemStates.Default;
if (SelectionChanged != null)
SelectionChanged(SelectedItems);
}
void ListingView_PointerMoved(ListView2Item data)
{
WriteDefaultStatusLabel();
}
