// ----------------------------------------------------------------
// FIT TO SCREEN
// this function will set the scaling factors above such
// that all nodes are scaled to within the screen viewing area
public void FitToScreen() // do not synchronize
{
double largestXCoord = Double.MIN_VALUE;
double smallestXCoord = Double.MAX_VALUE;
double largestYCoord = Double.MIN_VALUE;
double smallestYCoord = Double.MAX_VALUE;
double x, y;
// find the largest and smallest coords for all nodes
DisplayManager.NodeInfo currentDisplayInfo;
for (Enumeration nodes = MainClass.displayManager.GetNodeInfo(); nodes.hasMoreElements(); ) {
currentDisplayInfo = (DisplayManager.NodeInfo) nodes.nextElement();
if (screenIsEmpty) {
currentDisplayInfo.SetFitOnScreen(true);
}
if (((currentDisplayInfo.GetDisplayThisNode() == true)
&& (currentDisplayInfo.GetFitOnScreen()
== true))) // If the current node is displayed and old enough, or if they are the
// first nodes to be drawn
{
x = MainClass.locationAnalyzer.GetX(currentDisplayInfo.GetNodeNumber());
y = MainClass.locationAnalyzer.GetY(currentDisplayInfo.GetNodeNumber());
if (x > largestXCoord) {
largestXCoord = x;
}
if (x < smallestXCoord) {
smallestXCoord = x;
}
if (y > largestYCoord) {
largestYCoord = y;
}
if (y < smallestYCoord) {
smallestYCoord = y;
}
}
}
// here we use the following equations to set the scaling factors:
// xScale*SmallestXCoord + XIntercept = 0
// xScale*LargestXCoord + XIntercept = window.width();
//
// And the same for the y scaling factors.
// Note that I want a border of <Margin>% of the screen on both sides
Dimension d = getSize();
xScale = (d.width - 2 * (d.width / xMargin)) / (largestXCoord - smallestXCoord);
yScale = (d.height - 2 * (d.height / yMargin)) / (largestYCoord - smallestYCoord);
xScale =
Math.min(
xScale, yScale); // this is to make sure that the x and y coordinates are not warped
yScale = xScale;
xScaleIntercept = -xScale * smallestXCoord + d.width / xMargin;
yScaleIntercept = -yScale * smallestYCoord + d.height / yMargin;
screenIsEmpty = false;
if (MainClass.displayManager.proprietaryNodeInfo
.isEmpty()) // if there are no nodes and none of this function was executed
{
screenIsEmpty = true;
xScale = 1;
yScale = 1;
xScaleIntercept = 0;
yScaleIntercept = 0;
}
// System.out.println(xScale + " " + yScale);
// System.out.println(xScaleIntercept + " " + yScaleIntercept);
}
