protected override bool OnButtonReleaseEvent(EventButton evnt)
{
if (isRectSelection)
{
// remove scrolling and rectangular selection
if (scroll_timeout != 0)
{
GLib.Source.Remove(scroll_timeout);
scroll_timeout = 0;
}
isRectSelection = false;
if (BinWindow != null)
{
BinWindow.InvalidateRect(rect_select, false);
BinWindow.ProcessUpdates(true);
}
rect_select = new Rectangle();
}
else if (!isDragDrop)
{
int cell_num = CellAtPosition((int)evnt.X, (int)evnt.Y);
if (cell_num != -1)
{
if ((evnt.State & ModifierType.ControlMask) != 0)
{
Selection.ToggleCell(cell_num);
}
else if ((evnt.State & ModifierType.ShiftMask) != 0)
{
Selection.Add(FocusCell, cell_num);
}
else
{
Selection.Clear();
Selection.Add(cell_num);
}
FocusCell = cell_num;
}
}
isDragDrop = false;
return(true);
}
private void SetSize(int x, int y, int width, int height)
{
Hadjustment.Upper = Math.Max(Allocation.Width, width);
Vadjustment.Upper = Math.Max(Allocation.Height, height);
bool xchange = scroll && (int)(Hadjustment.Value) != x;
bool ychange = scroll && (int)(Vadjustment.Value) != y;
// reset scroll
scroll = false;
if (IsRealized)
{
BinWindow.FreezeUpdates();
}
if (xchange || ychange)
{
if (IsRealized)
{
BinWindow.MoveResize(-x, -y, (int)(Hadjustment.Upper), (int)(Vadjustment.Upper));
}
Vadjustment.Value = y;
Hadjustment.Value = x;
}
if (this.Width != Allocation.Width || this.Height != Allocation.Height)
{
SetSize((uint)Allocation.Width, (uint)height);
}
if (xchange || ychange)
{
Vadjustment.ChangeValue();
Hadjustment.ChangeValue();
}
if (IsRealized)
{
BinWindow.ThawUpdates();
BinWindow.ProcessUpdates(true);
}
}
public void InvalidateCell(int cell_num)
{
Rectangle cell_area = CellBounds(cell_num);
// FIXME where are we computing the bounds incorrectly
cell_area.Width -= 1;
cell_area.Height -= 1;
Gdk.Rectangle visible =
new Gdk.Rectangle((int)Hadjustment.Value,
(int)Vadjustment.Value,
Allocation.Width,
Allocation.Height);
Gdk.Rectangle intersection;
if (BinWindow != null && cell_area.Intersect(visible, out intersection))
{
BinWindow.InvalidateRect(intersection, false);
}
}
// during pointer motion, select/toggle pictures between initial x/y (param)
// and current x/y (get pointer)
private void UpdateRubberband()
{
// determine old and new selection
var old_selection = rect_select;
selection_end = GetPointer();
var new_selection = BoundedRectangle(selection_start, selection_end);
// determine region to invalidate
var region = Region.Rectangle(old_selection);
region.Xor(Region.Rectangle(new_selection));
region.Shrink(-1, -1);
BinWindow.InvalidateRegion(region, true);
rect_select = new_selection;
UpdateRubberbandSelection();
}
