public void DisplayNextImage(object state)
{
using (SuspendPainting suspend = new SuspendPainting(_application.Root))
{
if (_background.ImageResource != null)
{
// release old images
_background.ImageResource.Close();
}
_background.ImageResource = _foreground.ImageResource;
_background.Transparency = 0;
_foreground.Transparency = 1;
_foreground.ImageResource = _application.GetImageResource(imageNames[_currentImageIndex]);
_foreground.Animate(Animation.Fade(0, 0, FadeTime));
_background.Animate(Animation.Fade(1, 0, FadeTime));
}
_currentImageIndex = (_currentImageIndex + 1) % imageNames.Count;
}
private void Update(bool animate)
{
using (SuspendPainting suspend = new SuspendPainting(this))
{
if (_selected == -1 && Count != 0)
{
_selected = 0;
OnSelectionChanged();
}
//
// 1. update "top" so that selected is still visible
//
_top = Math.Max(Math.Min(_top, Count - _numberOfVisibleRows), 0);
int max = Math.Min(_top + _numberOfVisibleRows, Count) - 1;
if (_selected < _top)
{
_top = Math.Max(0, _selected);
}
else if (_selected > max)
{
int end = Math.Min(_selected + 1, Count);
_top = Math.Max(end - _numberOfVisibleRows, 0);
}
max = Math.Min(_top + _numberOfVisibleRows, Count) - 1;
//
// 2. populate rows and put them at the correct height
//
for (int i = _top; i <= max; ++i)
{
View v = _rows[i];
if (v == null)
{
v = CreateRow(i);
_rows[i] = v;
}
else
{
v.Location = new System.Drawing.Point(v.Location.X, i * _rowHeight);
}
}
//
// 3. fix "dirty" rows
//
if (_dirty != -1)
{
max = Math.Min(_dirty + _numberOfVisibleRows, Count) - 1;
for (int i = _dirty; i <= max; ++i)
{
View v = _rows[i];
if (v != null)
{
v.Location = new System.Drawing.Point(v.Location.X, i * _rowHeight);
}
}
_dirty = -1;
}
//
// 4. translate to the right location
//
this.Animate(Animation.Translate(new System.Drawing.Point(0, -_top * _rowHeight), 0, animTime));
//
// 5. move the selector
//
if (_selected >= 0)
{
_selector.Visible = true;
_selector.Animate(Animation.Move(new System.Drawing.Point(0, _selected * _rowHeight), 0, animTime));
}
else
{
_selector.Visible = false;
}
}
}
