fill grid with color [fltk]

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 13 Drill 3
Using GUI library called FLTK (Fast Light Tool Kit, “full tick”).

Output:

[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 13 Drill 3

#define _USE_MATH_DEFINES
#include "Simple_window.h"
#include "Graph.h"
#include <cmath>
using namespace Graph_lib;

int main()
try
{
Point tl(100, 100);
Simple_window win(tl, 1000, 800, "Simple Window");

int x_grid = 100;
int y_grid = 100;
int x_size = 800;
int y_size = 800;

//grid
Lines grid;
grid.set_color(Color::black);

for (int x = x_grid; x < x_size; x += x_grid) {
grid.add(Point(x, 0), Point(x, y_size));
}
for (int y = y_grid; y < y_size; y += y_grid) {
grid.add(Point(0, y), Point(x_size, y));
}

//diagonal rectangles
Vector_ref<Graph_lib::Rectangle> diagonal_rectangles;

for (int i = 0; i < 8; i++) {
diagonal_rectangles.push_back(new Graph_lib::Rectangle(Point(x_grid * i, y_grid * i), x_grid, y_grid));
diagonal_rectangles[i].set_fill_color(Color::red);
win.attach(diagonal_rectangles[i]);
}

win.attach(grid);
win.wait_for_button();
}
catch (exception& e) {
cout << e.what() << endl;
return 1;
}
catch (…) {
cout << "Exiting" << endl;
return 2;
}
[/code]

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