mirror of https://github.com/fltk/fltk
101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
//
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// Curve test program for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2015 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include <FL/Fl.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Hor_Value_Slider.H>
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#include <FL/fl_draw.H>
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#include <FL/Fl_Toggle_Button.H>
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double args[9] = {
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20,20, 50,200, 100,20, 200,200, 0};
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const char* name[9] = {
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"X0", "Y0", "X1", "Y1", "X2", "Y2", "X3", "Y3", "rotate"};
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int points;
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class Drawing : public Fl_Widget {
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void draw() FL_OVERRIDE {
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fl_push_clip(x(),y(),w(),h());
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fl_color(FL_DARK3);
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fl_rectf(x(),y(),w(),h());
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fl_push_matrix();
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if (args[8]) {
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fl_translate(x()+w()/2.0, y()+h()/2.0);
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fl_rotate(args[8]);
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fl_translate(-(x()+w()/2.0), -(y()+h()/2.0));
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}
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fl_translate(x(),y());
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if (!points) {
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fl_color(FL_WHITE);
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fl_begin_complex_polygon();
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fl_curve(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
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fl_end_complex_polygon();
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}
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fl_color(FL_BLACK);
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fl_begin_line();
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fl_vertex(args[0],args[1]);
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fl_vertex(args[2],args[3]);
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fl_vertex(args[4],args[5]);
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fl_vertex(args[6],args[7]);
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fl_end_line();
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fl_color(points ? FL_WHITE : FL_RED);
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points ? fl_begin_points() : fl_begin_line();
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fl_curve(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
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points ? fl_end_points() : fl_end_line();
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fl_pop_matrix();
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fl_pop_clip();
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}
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public:
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Drawing(int X,int Y,int W,int H) : Fl_Widget(X,Y,W,H) {}
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};
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Drawing *d;
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void points_cb(Fl_Widget* o, void*) {
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points = ((Fl_Toggle_Button*)o)->value();
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d->redraw();
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}
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void slider_cb(Fl_Widget* o, void* v) {
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Fl_Slider* s = (Fl_Slider*)o;
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args[fl_intptr_t(v)] = s->value();
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d->redraw();
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}
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int main(int argc, char** argv) {
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Fl_Double_Window window(300,555);
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Drawing drawing(10,10,280,280);
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d = &drawing;
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int y = 300;
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for (int n = 0; n<9; n++) {
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Fl_Slider* s = new Fl_Hor_Value_Slider(50,y,240,25,name[n]); y += 25;
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s->minimum(0); s->maximum(280);
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if (n == 8) s->maximum(360);
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s->step(1);
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s->value(args[n]);
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s->align(FL_ALIGN_LEFT);
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s->callback(slider_cb, (void*)(fl_intptr_t)n);
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}
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Fl_Toggle_Button but(50,y,50,25,"points");
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but.callback(points_cb);
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window.end();
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window.show(argc,argv);
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return Fl::run();
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}
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