Version 5.0 The LEDA User Manual

All four variants initialize the coordinates of W to xmin = 0, xmax = 100 and ymin = 0.
The init operation (see below) can later be used to change the window coordinates and
scaling. Please note, that a window is not displayed before the function display is called
for it.
3. Operations
3.1 Initialization
void W.init(double x 0 , double x 1 , double y 0 )
double W.set grid dist(double d)
grid style W.set grid style(grid style s)
sets xmin to x 0 , xmax to x 1 , and ymin to y 0 ,
the scaling factor scaling to w/(xmax−xmin),
and ymax to ymin + h/scaling. Here w and h
are the width and height of the drawing section
in pixels.
sets the grid distance of W to d.
sets the grid style of W to s.
int
int
void
W.set grid mode(int d) sets the grid distance of W to d pixels.
W.set precision(int prec)
sets the precision of W to prec.
W.init(double x 0 , double x 1 , double y 0 , int d, bool erase = true)
same as W .init(x 0 , x 1 , y 0 ) followed by
W .set grid mode(d). If the optional flag
erase is set to false the window will not be
erased.
void W.display( ) opens W and displays it with its right upper
corner in the upper right corner of the screen.
Note that W .display() has to be called before
all drawing operations and that all operations
adding panel items to W (cf. 17.2) have to be
called before the first call of W .display().
void
W.display(int x, int y) opens W and displays it with its left upper corner
at position (x, y). Special values for x and
y are window :: min, window :: center, and
window :: max for positioning W at the minimal
or maximal x or y coordinate or centering
it in the x or y dimension.