fltk/test/line_style.cxx

//
// Line style demo for the Fast Light Tool Kit (FLTK).
//
// Copyright 2000-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
//     https://www.fltk.org/bugs.php
//

#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Value_Slider.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Choice.H>
#include <FL/Fl_Check_Button.H>
#include <FL/Fl_Box.H>

Fl_Double_Window *form;
Fl_Slider *sliders[9];
Fl_Choice *choice[3];
Fl_Check_Button *draw_line;

class test_box: public Fl_Double_Window {
  void draw() FL_OVERRIDE;
public:
  test_box(int x,int y,int w,int h,const char *l=0)
    : Fl_Double_Window(x,y,w,h,l) {}
}*test;

void test_box::draw() {
  Fl_Double_Window::draw();
  fl_color((uchar)(sliders[0]->value()),
           (uchar)(sliders[1]->value()),
           (uchar)(sliders[2]->value()));
  // dashes
  char dashes[5];
  dashes[0] = char(sliders[5]->value());
  dashes[1] = char(sliders[6]->value());
  dashes[2] = char(sliders[7]->value());
  dashes[3] = char(sliders[8]->value());
  dashes[4] = 0;
  fl_line_style(
    (int)(choice[0]->mvalue()->argument() +
    choice[1]->mvalue()->argument() +
    choice[2]->mvalue()->argument()),
    (int)(sliders[3]->value()),          // width
    dashes);

  // draw the defined fl_rect and fl_vertex first and then
  // the additional one-pixel line, if enabled
  // sliders[4] = x/y coordinate translation (default = 10)

  for (int i=0; i<draw_line->value()+1; i++) {
    int move = (int)sliders[4]->value();
    fl_rect(move,move,w()-20,h()-20);
    fl_begin_line();
    fl_vertex(move+25, move+25);
    fl_vertex(w()-45+move, h()-45+move);
    fl_vertex(w()-50+move, move+25);
    fl_vertex(move+25, h()/2-10+move);
    fl_end_line();
    // you must reset the line type when done:
    fl_line_style(FL_SOLID);
    fl_color(FL_BLACK);
  }
}

Fl_Menu_Item style_menu[] = {
  {"FL_SOLID",  0, 0, (void*)FL_SOLID},
  {"FL_DASH",   0, 0, (void*)FL_DASH},
  {"FL_DOT",    0, 0, (void*)FL_DOT},
  {"FL_DASHDOT",0, 0, (void*)FL_DASHDOT},
  {"FL_DASHDOTDOT", 0, 0, (void*)FL_DASHDOTDOT},
  {0}
};

Fl_Menu_Item cap_menu[] = {
  {"default",           0, 0, 0},
  {"FL_CAP_FLAT",       0, 0, (void*)FL_CAP_FLAT},
  {"FL_CAP_ROUND",      0, 0, (void*)FL_CAP_ROUND},
  {"FL_CAP_SQUARE",     0, 0, (void*)FL_CAP_SQUARE},
  {0}
};

Fl_Menu_Item join_menu[] = {
  {"default",           0, 0, 0},
  {"FL_JOIN_MITER",     0, 0, (void*)FL_JOIN_MITER},
  {"FL_JOIN_ROUND",     0, 0, (void*)FL_JOIN_ROUND},
  {"FL_JOIN_BEVEL",     0, 0, (void*)FL_JOIN_BEVEL},
  {0}
};

void do_redraw(Fl_Widget*,void*)
{
    test->redraw();
}

void makeform(const char *) {
  form = new Fl_Double_Window(500,250,"fl_line_style() test");
  sliders[0]= new Fl_Value_Slider(280,10,180,20,"R");
  sliders[0]->bounds(0,255);
  sliders[1]= new Fl_Value_Slider(280,30,180,20,"G");
  sliders[1]->bounds(0,255);
  sliders[2]= new Fl_Value_Slider(280,50,180,20,"B");
  sliders[2]->bounds(0,255);
  choice[0]= new Fl_Choice(280,70,180,20,"Style");
  choice[0]->menu(style_menu);
  choice[1]= new Fl_Choice(280,90,180,20,"Cap");
  choice[1]->menu(cap_menu);
  choice[2]= new Fl_Choice(280,110,180,20,"Join");
  choice[2]->menu(join_menu);
  sliders[3]= new Fl_Value_Slider(280,130,180,20,"Width");
  sliders[3]->bounds(0,20);
  sliders[4]= new Fl_Value_Slider(280,150,180,20,"Move");
  sliders[4]->bounds(-10,20);
  draw_line = new Fl_Check_Button(280,170,20,20,"&Line");
  draw_line->align(FL_ALIGN_LEFT);
  new Fl_Box (305,170,160,20,"add a 1-pixel black line");
  sliders[5] = new Fl_Slider(200,210,70,20,"Dash");
  sliders[5]->align(FL_ALIGN_TOP_LEFT);
  sliders[5]->bounds(0,40);
  sliders[6] = new Fl_Slider(270,210,70,20);
  sliders[6]->bounds(0,40);
  sliders[7] = new Fl_Slider(340,210,70,20);
  sliders[7]->bounds(0,40);
  sliders[8] = new Fl_Slider(410,210,70,20);
  sliders[8]->bounds(0,40);
  int i;
  for (i=0;i<9;i++) {
    sliders[i]->type(1);
    if (i<5) sliders[i]->align(FL_ALIGN_LEFT);
    sliders[i]->callback((Fl_Callback*)do_redraw);
    sliders[i]->step(1);
  }
  sliders[0]->value(255); // R
  sliders[1]->value(100); // G
  sliders[2]->value(100); // B
  sliders[4]->value(10);  // move line coordinates
  draw_line->value(0);
  draw_line->callback((Fl_Callback*)do_redraw);
  for (i=0;i<3;i++) {
    choice[i]->value(0);
    choice[i]->callback((Fl_Callback*)do_redraw);
  }
  test = new test_box(0,0,200,200);
  test->end();
  form->resizable(test);
  form->end();
}

int main(int argc, char **argv) {
  makeform(argv[0]);
  form->show(argc,argv);
  return Fl::run();
}