Hey, so I'm having a problem getting FLTK to show anything in it's window...
I'm trying to eventually create a program that can play back video, but right
now am just working on getting the following example from
http://seriss.com/people/erco/fltk/ to work...
I'm using the gcc compiler with code::blocks and linking it to fltk and fltk_gl.
Has anybody else had this same problem?
#include <FL/Fl.H>
#include <FL/Fl_Gl_Window.H>
#include <FL/gl.h>
//
// Simple resizable 2D GL window
// erco 10/08/05
//
class MyGlWindow : public Fl_Gl_Window {
// DRAW METHOD
// OpenGL window: (w,h) is upper right, (-w,-h) is lower left, (0,0)
is center
//
void draw() {
// First time? init viewport, etc.
if (!valid()) {
valid(1);
glLoadIdentity();
glViewport(0,0,w(),h());
glOrtho(-w(),w(),-h(),h(),-1,1);
}
// Clear screen
glClear(GL_COLOR_BUFFER_BIT);
// Draw white 'X'
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_LINE_STRIP); glVertex2f(w(), h()); glVertex2f(-w(),-h());
glEnd();
glBegin(GL_LINE_STRIP); glVertex2f(w(),-h()); glVertex2f(-w(), h());
glEnd();
}
// HANDLE WINDOW RESIZING
// If window reshaped, need to readjust viewport/ortho
//
void resize(int X,int Y,int W,int H) {
Fl_Gl_Window::resize(X,Y,W,H);
glLoadIdentity();
glViewport(5,5,W,H);
glOrtho(-W,W,-H,H,-1,1);
redraw();
}
public:
// CONSTRUCTOR
MyGlWindow(int X,int Y,int W,int H,const char*L="Test") :
Fl_Gl_Window(X,Y,W,H,L) {
}
};
// MAIN
int main() {
Fl_Window win(500, 300);
MyGlWindow mygl(10, 10, win.w()-20, win.h()-20);
win.end();
win.resizable(mygl);
win.show();
return(Fl::run());
}
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