public override void executePress(Point p, Drawing d)
{
//grab frontmost shape at point, copy it, then perform normal move command on copy
s = d.getFrontmostContainer(p);
d.copy(s);
base.executePress(p,d);
}
public override void executeClick(Point p, Drawing d)
{
//if current point is contained by a shape
if (d.getFrontmostContainer(p) != null)
{
//set shape's color equal to drawing object's color
d.getFrontmostContainer(p).MyColor = d.MyColor;
}
}
public override void executePress(Point p, Drawing d)
{
lastX = p.X;
lastY = p.Y;
do
{
s = d.getFrontmostContainer(p);
doTwice++;
}while(doTwice < 2);
//System.Windows.Forms.MessageBox.Show(d.getFrontmostContainer(p).ToString());
}
public override void executeDrag(Point p, Drawing d)
{
//as long as point is contained in a shape onscreen...
if (s != null)
{
s.move(p.X-lastX,p.Y-lastY);
lastX = p.X;
lastY = p.Y;
}
return;
}
//copy constructor
public Drawing(Drawing d)
{
InitializeComponent();
ClientSize = d.ClientSize;
myImage = d.myImage;
myShapes = new ArrayList();
//copy each shape in list
foreach (Shape s in d.myShapes)
{
myShape = new Rect(0,0,1,1,Color.Black);
//is s a rectangle...?
if (myShape.GetType() == s.GetType()) myShape = new Rect((Rect)s);
else
{
//is it an oval...?
myShape = new Oval(0,0,1,1,Color.Black);
if (myShape.GetType() == s.GetType()) myShape = new Oval((Oval)s);
else
{
//is it a line...?
myShape = new Segment(0,0,1,1,Color.Black,1);
if (myShape.GetType() == s.GetType()) myShape = new Segment((Segment)s);
else
{
//is it a triangle...?
Point p1 = new Point();
Point p2 = new Point();
Point p3 = new Point();
myShape = new Triangle(p1,p2,p3,Color.Black);
if (myShape.GetType() == s.GetType()) myShape = new Triangle((Triangle)s);
}
}
}
myShape.MyColor = s.MyColor;
myShape.MyCenter = s.MyCenter;
myShapes.Add(myShape);
}
myShape = d.myShape;
offGraphics = d.offGraphics;
visGraphics = d.visGraphics;
offBitmap = d.offBitmap;
offGraphics = Graphics.FromImage(offBitmap);
myColor = d.myColor;
}
//on mouse move
public override void executeDrag(Point p, Drawing d)
{
d.clear();
//if point of click was to the left of current point...
if (lastX < p.X)
{
d.MyShape = new Segment(lastX,lastY,p.X-lastX,p.Y-lastY,d.MyColor,5);
}
//if point of click was to the right of current point...
else if (p.X < lastX)
{
d.MyShape = new Segment(p.X, p.Y, lastX-p.X,lastY-p.Y,d.MyColor,5);
}
}
//on mouse down public abstract void executePress(Point p, Drawing d);
//on mouse move public abstract void executeDrag(Point p, Drawing d);
//on mouse up public abstract void executeClick(Point p, Drawing d);
//on mouse down
public override void executePress(Point p, Drawing d)
{
//identify original point of mouse down
lastX = p.X;
lastY = p.Y;
}
//on mouse up
public override void executeClick(Point p, Drawing d)
{
d.addShape(d.MyShape);
d.MyShape = null;
}
public override void executePress(Point p, Drawing d)
{
}
public override void executeDrag(Point p, Drawing d)
{
}
public override void executeClick(Point p, Drawing d)
{
//if current point is contained in a shape
if(d.getFrontmostContainer(p)!=null)d.delete(d.getFrontmostContainer(p));
return;
}
public override void executeClick(Point p, Drawing d)
{
s = null;
}