Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 14 Exercise 10
Using GUI library called FLTK (Fast Light Tool Kit, “full tick”).
Output:
[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 14 Exercise 10
#define _USE_MATH_DEFINES
#include "Simple_window.h"
#include "Graph.h"
#include <cmath>
using namespace Graph_lib;
ostream& operator<<(ostream& out, Point& a) {
out << "(" << a.x << "," << a.y << ")";
return out;
}
struct Pseudo_window : public Shape
{
Pseudo_window(Point origin, int width, int height, int radius, string label, string content_location)
: o(origin), w(width), h(height), r(radius), l(label), content_location(content_location)
{
initialize_outline();
initialize_label_bar();
};
void draw_lines() const;
void initialize_outline();
void initialize_label_bar();
private:
Point o;
Point a1, a2, b1, b2, c1, c2, d1, d2;
Point a3, b3, c3, d3;
int w, h, r;
string l;
Point bar_line_s; // label bar line start
Point bar_line_e; // label bar line end
Point bar_close_s;
Point bar_close_e;
Point bar_extend_s;
Point bar_extend_e;
Point bar_minimize_s;
Point bar_minimize_e;
string content_location;
};
void Pseudo_window::initialize_outline()
{
a1 = Point(o.x + r, o.y);
b1 = Point(o.x + w – r, o.y);
b2 = Point(o.x + w, o.y + r);
c1 = Point(o.x + w, o.y + h – r);
c2 = Point(o.x + w – r, o.y + h);
d1 = Point(o.x + r, o.y + h);
d2 = Point(o.x, o.y + h – r);
a2 = Point(o.x, o.y + r);
a3 = Point(o.x + r, o.y + r);
b3 = Point(o.x + w – r, o.y + r);
c3 = Point(o.x + w – r, o.y + h – r);
d3 = Point(o.x + r, o.y + h – r);
}
void Pseudo_window::initialize_label_bar()
{
// add point for label text
add(Point(o.x + 10, o.y + 17));
// add points for label bar line
bar_line_s = Point(o.x + 3, o.y + 23);
bar_line_e = Point(o.x + w – 3, o.y + 23);
// add label bar buttons
bar_close_s = Point(o.x + w – 20, o.y + 7);
bar_close_e = Point(o.x + w – 10, o.y + 17);
bar_extend_s = Point(o.x + w – 40, o.y + 7);
bar_extend_e = Point(o.x + w – 30, o.y + 17);
bar_minimize_s = Point(o.x + w – 60, o.y + 7);
bar_minimize_e = Point(o.x + w – 50, o.y + 17);
}
void Pseudo_window::draw_lines() const
{
// buttons
Graph_lib::Rectangle close(bar_close_s, bar_close_e);
Graph_lib::Rectangle extend(bar_extend_s, bar_extend_e);
Graph_lib::Rectangle minimize(bar_minimize_s, bar_minimize_e);
close.set_fill_color(Color::red);
extend.set_fill_color(Color::green);
minimize.set_fill_color(Color::yellow);
// image content
Image image0(Point(o.x + 10, o.y + 33), content_location);
image0.set_mask(Point(o.x + 100, o.y + 300), w – 20, h – 20 – 23);
// content window
Graph_lib::Rectangle content_rect(Point(o.x + 10, o.y + 33), Point(o.x + w – 10, o.y + h – 10));
if (color().visibility()) {
// draw label bar text
fl_draw(l.c_str(), point(0).x, point(0).y);
// draw label bar line
fl_line(bar_line_s.x, bar_line_s.y, bar_line_e.x, bar_line_e.y);
// draw buttons
close.draw();
extend.draw();
minimize.draw();
// draw content image
image0.draw();
// draw content rectangle
content_rect.draw();
fl_line(a1.x, a1.y, b1.x, b1.y);
fl_line(b2.x, b2.y, c1.x, c1.y);
fl_line(c2.x, c2.y, d1.x, d1.y);
fl_line(d2.x, d2.y, a2.x, a2.y);
fl_arc(o.x, o.y, r + r, r + r, 90, 180);
fl_arc(o.x + w – (r + r), o.y, r + r, r + r, 360, 90);
fl_arc(o.x + w – (r + r), o.y + h – (r + r), r + r, r + r, 270, 360);
fl_arc(o.x, o.y + h – (r + r), r + r, r + r, 180, 270);
}
}
int main()
try
{
Point tl(100, 100);
Simple_window win(tl, 720, 400, "Simple Window");
Point center(win.x_max() / 2, win.y_max() / 2);
Pseudo_window p_win(Point(60, 50), 600, 300, 10, "pseudowin", "Input/Original-JPG-Image_large.jpg");
p_win.set_color(Color::black);
win.attach(p_win);
win.wait_for_button();
}
catch (exception& e) {
cout << e.what() << endl;
return 1;
}
catch (…) {
cout << "Exiting" << endl;
return 2;
}
[/code]
