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| -rw-r--r-- | examples/Makefile | 1 | ||||
| -rw-r--r-- | examples/howto-draw-an-x.cxx | 54 |
2 files changed, 55 insertions, 0 deletions
diff --git a/examples/Makefile b/examples/Makefile index a516af365..f26f7dccf 100644 --- a/examples/Makefile +++ b/examples/Makefile @@ -12,6 +12,7 @@ ALL = browser-simple$(EXEEXT) \ howto-add_fd-and-popen$(EXEEXT) \ howto-browser-with-icons$(EXEEXT) \ howto-drag-and-drop$(EXEEXT) \ + howto-draw-an-x$(EXEEXT) \ howto-menu-with-images$(EXEEXT) \ howto-parse-args$(EXEEXT) \ howto-remap-numpad-keyboard-keys$(EXEEXT) \ diff --git a/examples/howto-draw-an-x.cxx b/examples/howto-draw-an-x.cxx new file mode 100644 index 000000000..4c0038f0d --- /dev/null +++ b/examples/howto-draw-an-x.cxx @@ -0,0 +1,54 @@ +// +// "$Id$" +// +// Demonstrate how to draw an 'X' in fltk +// +// Create a custom widget that draws an 'X' to the corners of the window, +// even when window is resized. Here we subclass Fl_Widget, the lowest level +// FLTK widget object. Origin: http://seriss.com/people/erco/fltk/#FltkX +// +// Copyright 2005 by Greg Ercolano. +// Copyright 1998-2017 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: +// +// http://www.fltk.org/COPYING.php +// +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php +// + +#include <FL/Fl.H> +#include <FL/fl_draw.H> +#include <FL/Fl_Double_Window.H> + +class DrawX : public Fl_Widget { +public: + DrawX(int X, int Y, int W, int H, const char*L=0) : Fl_Widget(X,Y,W,H,L) { + } + void draw() { + // Draw background - a white filled rectangle + fl_color(FL_WHITE); fl_rectf(x(),y(),w(),h()); + // Draw black 'X' over base widget's background + fl_color(FL_BLACK); + int x1 = x(), y1 = y(); + int x2 = x()+w()-1, y2 = y()+h()-1; + fl_line(x1, y1, x2, y2); + fl_line(x1, y2, x2, y1); + } +}; +int main() { + Fl_Double_Window win(200,200,"Draw X"); + DrawX draw_x(10, 10, win.w()-20, win.h()-20); // put our widget 10 pixels within window edges + draw_x.color(FL_WHITE); // make widget's background white + win.resizable(draw_x); + win.show(); + return(Fl::run()); +} + +// +// End of "$Id$". +// |