private void HandleMouseMove(object sender, MouseEventArgs mouseEventArgs)
{
var hit = HitTest(mouseEventArgs.Location);
var hitField = hit.HasValue ? hit.Value.Item1 : null;
// jesli nie ma zmian - konczymy
if (_HighlightedField == null && hitField == null)
{
return;
}
if (_HighlightedField != null && hitField != null && _HighlightedField.Equals(hitField))
{
return;
}
var highlighted = (hitField != null && CanBeHighlighted(hitField)) ? hitField : null;
var selected = _SelectedField;
using (var canvas = Graphics.FromImage(_MainPictureBox.Image))
{
ClearMarks(canvas);
SetMarks(canvas, highlighted, selected);
}
_MainPictureBox.Invalidate();
}
private void SetMarks(Graphics canvas, FieldCoords highlighted, FieldCoords selected)
{
_HighlightedField = highlighted;
_SelectedField = selected;
if (highlighted == null && selected == null)
{
return;
}
if (highlighted?.Equals(selected) == true)
{
DrawField(canvas, highlighted, State[highlighted], FieldDrawType.Highlighted | FieldDrawType.Selected);
return;
}
if (highlighted != null)
{
DrawField(canvas, highlighted, State[highlighted], FieldDrawType.Highlighted);
}
if (selected != null)
{
DrawField(canvas, selected, State[selected], FieldDrawType.Selected);
}
}