public void BackWard()
{
IMyFrame prevFrame = _historyFrame.pop();
if (prevFrame == null)
{
return;
}
_currentFrame = prevFrame;
applyFrameToWindow(_currentFrame);
}
public FrameNavigator(IHostNavigator hostNavigator, object[] AvailableFrames) : base()
{
if (hostNavigator == null)
{
throw new ArgumentNullException("Not supply IHostnavitor");
}
if (AvailableFrames == null || AvailableFrames.Count() <= 0)
{
throw new ArgumentNullException("Not supply available collection frame or don't have any frame in collection");
}
_hostNavigator = hostNavigator;
_availableFrame = AvailableFrames;
_currentFrame = null;
}
public void GoTo(int indexOfAvailableCollectionFrame, Action actionBeforeGoTo)
{
if (_currentFrame == null)
{
_currentFrame = new AvailableFrame(indexOfAvailableCollectionFrame, actionBeforeGoTo);
applyFrameToWindow(_currentFrame);
}
else
{
if (_currentFrame.IndexOfFrame == indexOfAvailableCollectionFrame)//go to same current frame ignore
{
return;
}
else
{
_historyFrame.push(_currentFrame); //push current frame
_currentFrame = new AvailableFrame(indexOfAvailableCollectionFrame, actionBeforeGoTo); //pointer current frame to new instance
applyFrameToWindow(_currentFrame);
}
}
}
private void applyFrameToWindow(IMyFrame frame)
{
_hostNavigator.ActiveFrameIndex = frame.IndexOfFrame;
}