# using simple fltk graphics interface classes 1.0 [fltk]

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 12 Drill 2
Using a GUI library called FLTK (Fast Light Tool Kit, “full tick”).

```12.7.2 Output:

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```12.7.3 Output:

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```12.7.4 Output:

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```12.7.5 Output:

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```12.7.6 Output:

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```12.7.7 Output:

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```12.7.8 Output:

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```12.7.9 Output:

```
```12.7.10 Output:

```

[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 12 Drill 2

#include "Simple_window.h"
#include "Graph.h"
using namespace Graph_lib;

int main()
try
{

//12.7.2
Point tl(100, 100); //top left corner of our window
Simple_window win(tl, 600, 400, "Canvas");
//screen coordinate tl for top left corner
//window size(600*400)
//title: Canvas

//12.7.3
Axis xa(Axis::x, Point(20, 300), 280, 10, "x axis");
//an Axis is a kind of Shape
//Axis::x means horizontal
//starting at (20,300)
//280 pixels long
//10 "notches"
//label the axis "x axis"
win.attach(xa); //attach xa to the window, win
win.set_label("Canvas #2"); //relabel the window

Axis ya(Axis::y, Point(20, 300), 280, 10, "y axis");
ya.set_color(Color::cyan); //choose a color
ya.label.set_color(Color::dark_red); //choose a color for the text
win.attach(ya);
win.set_label("Canvas #3");

//12.7.4
Function sine(sin, 0, 100, Point(20, 150), 1000, 50, 50);
//sine curve
//plot sin() in the range [0:100] with (0,0) at (20,150)
//using 1000 points; scale x values *50, scale y values *50
win.attach(sine);
win.set_label("Canvas #4");

//12.7.5
sine.set_color(Color::blue);

Graph_lib::Polygon poly;

poly.set_color(Color::red);
poly.set_style(Line_style::dash);
win.attach(poly);
win.set_label("Canvas #5");

//12.7.6
Graph_lib::Rectangle r(Point(200, 200), 100, 50);
//top left corner, width, height
win.attach(r);
win.set_label("Canvas #6");

Closed_polyline poly_rect;
win.attach(poly_rect);

//12.7.7
r.set_fill_color(Color::yellow);//color the inside of the rectangle
poly.set_style(Line_style(Line_style::dash, 4));
poly_rect.set_style(Line_style(Line_style::dash, 2));
poly_rect.set_fill_color(Color::green);
win.set_label("Canvas #7");

//12.7.8
Text t(Point(150, 150), "Hello, graphical world!");
win.attach(t);
win.set_label("Canvas #8");

t.set_font(Font::times_bold);
t.set_font_size(20);
win.set_label("Canvas #9");

//12.7.9
Image ii(Point(100, 50), "Input/Original-JPG-Image.jpg");
win.attach(ii);
win.set_label("Canvas #10");

ii.move(100, 200);
win.set_label("Canvas #11");

//12.7.10
Circle c(Point(100, 200), 50);
Graph_lib::Ellipse e(Point(100, 200), 75, 25);
e.set_color(Color::dark_red);
Mark m(Point(100, 200), ‘x’);

ostringstream oss;
oss << "screen size: " << x_max() << "*" << y_max()
<< "; window size: " << win.x_max() << "*" << win.y_max();
Text sizes(Point(100, 20), oss.str());

Image cal(Point(255, 255), "Input/image2.jpeg");

win.attach(c);
win.attach(m);
win.attach(e);
win.attach(sizes);
win.attach(cal);
win.set_label("Canvas #12");

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