/**********************************************************************
***********************************************************************
* draw on canvas */
void PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
//canvas object
info = e.Info; //
SKSurface surface = e.Surface;
canvas = surface.Canvas;
//Important! Otherwise the drawing will look messed up in iOS
if (canvas != null)
{
canvas.Clear();
}
CalculateNeededVariables();
MakeSKPaint();
/*********************HERE GOES THE DRAWING************************/
/*important: the coordinate system starts in the upper left corner*/
WriteInitialMemoryFragmentationOnCanvas();
float relativeFragmentSize = DrawMemory();
AllocationStrategiesAlgorithm.Status status = AllocationStrategiesAlgorithm.GetStatus();
if (status == AllocationStrategiesAlgorithm.Status.searching || status == AllocationStrategiesAlgorithm.Status.successfull)
{
DrawRedArrow(relativeFragmentSize);
int promIndex = AllocationStrategiesAlgorithm.GetMostPromisingIndex();
if (promIndex != -1)
{
DrawGrayArrow(promIndex, relativeFragmentSize);
}
}
//execute all drawing actions
canvas.Flush();
}
/**********************************************************************
*********************************************************************/
async void B_Next_Clicked(object sender, EventArgs e)
{
AllocationStrategiesAlgorithm.Status status = AllocationStrategiesAlgorithm.GetStatus();
// if new memory request was made
if (b_Next.Text == "Confirm")
{
// if the memory request is valid
if (ValidateMemoryRequestInput(e_MemoryRequest.Text))
{
b_Next.Text = "Next";
// disable memory request entry and indicate that it's accepted
e_MemoryRequest.IsEnabled = false;
e_MemoryRequest.BackgroundColor = Color.FromRgba(172, 255, 47, 30);
// enable restart button
b_Restart.IsEnabled = true;
// check first if memory is already full before you make a new request
if (AllocationStrategiesAlgorithm.MemoryIsFull())
{
await DisplayAlert("Alert", "Out of memory! Please restart.", "OK");
b_Next.Text = "Confirm";
e_MemoryRequest.IsEnabled = true; // enable memory request entry
e_MemoryRequest.BackgroundColor = Color.White;
e_MemoryRequest.Text = "";
}
else
{
AllocationStrategiesAlgorithm.Start(Int32.Parse(e_MemoryRequest.Text));
}
}
// otherwise wait until a valid memory request is made by the user
else
{
e_MemoryRequest.BackgroundColor = Color.FromRgba(238, 130, 238, 30);
}
}
else
{
//Debug.WriteLine("next button text");
// start or still searching
if (status == AllocationStrategiesAlgorithm.Status.searching || status == AllocationStrategiesAlgorithm.Status.start)
{
Debug.WriteLine("start or Still searching ");
AllocationStrategiesAlgorithm.Next();
status = AllocationStrategiesAlgorithm.GetStatus();
if (status == AllocationStrategiesAlgorithm.Status.successfull)
{
b_Next.Text = "Allocate";
}
else if (status == AllocationStrategiesAlgorithm.Status.unsuccessfull)
{
b_Next.Text = "Confirm";
e_MemoryRequest.IsEnabled = true; // enable memory request entry
e_MemoryRequest.BackgroundColor = Color.White;
e_MemoryRequest.Text = "";
await DisplayAlert("Alert", "Memory request was unsuccessfull.", "OK");
}
}
//sth found
else if (status == AllocationStrategiesAlgorithm.Status.successfull)
{
//Debug.WriteLine("Sth found");
AllocationStrategiesAlgorithm.UpdateAllFragmentsList();
b_Next.Text = "Confirm";
e_MemoryRequest.IsEnabled = true; // enable memory request entry
e_MemoryRequest.BackgroundColor = Color.White;
e_MemoryRequest.Text = "";
}
/*
* else if (status == AllocationStrategiesAlgorithm.Status.unsuccessfull)
* {
* b_Next.Text = "Confirm";
* e_MemoryRequest.IsEnabled = true; // enable memory request entry
* e_MemoryRequest.BackgroundColor = Color.White;
* e_MemoryRequest.Text = "";
* await DisplayAlert("Alert", "Memory request was unsuccessfull.", "OK");
*
* }*/
}
AllocationStrategiesDraw.Paint();
}
