> > > > On 30 May 2012, at 22:23, Casey wrote: > > > > > So I am trying to replicate my own version of mspaint with fltk. I = > > have two problems, my first problem is that I am limited to a certain = > > number of points. My current method is using a predetermined amount of = > > points(line 46: point points[1000]; ) Is there a better method that just = > > adjusts the amount of points according to the user's input instead of = > > limiting the number of points to 1000??? This presents another issue = > > where the color is changing every point, instead of the current point = > > the user is working on. Any help wouldbe greatly appreciated! Thanx! > > > > Or you could just look in the links pages for "anti paint" and study = > > that code - that's a pretty good re-implementation of a paint-style = > > pixel pusher, though was done for a quite old version of fltk so I'm not = > > sure whether it will build with current fltk libs or not. > > > > Still, worth looking at for the educational value of nothing else. > > > > > Thank you Ian, the link I am getting isn't active anymore, you wouldn't > happen to have an active link would you? Thank you for the help again. > > http://studwww.rug.ac.be/~hyperman/antipaint/download.html
I was generously provided with an active link here: http://sowearedads.com/videos/antipaint.zip I also found another source code here: #include <Fl/Fl.H> #include <FL/Fl_Double_Window.H> #include <Fl/Fl_Box.H> #include <Fl/fl_draw.H> #define window_size 400 static Fl_Double_Window *main_window = 0; // the main app window static Fl_Offscreen offscreen_buffer = 0; // the offscreen surface /*****************************************************************************/ /* This class provides a view to copy the offscreen surface to */ class canvas : public Fl_Box { void draw(); int handle(int event); public: canvas(int x, int y, int w, int h); }; /*****************************************************************************/ /* Constructor */ canvas::canvas(int x, int y, int w, int h) : Fl_Box(x,y,w,h){ } // Constructor /*****************************************************************************/ void canvas::draw() { if(offscreen_buffer) { // offscreen exists // blit the required view from the offscreen onto the box fl_copy_offscreen(x(), y(), w(), h(), offscreen_buffer, 0,0); } else { // create the offscreen main_window->make_current(); //ensures suitable graphic context offscreen_buffer = fl_create_offscreen( w(), h() ); if(!offscreen_buffer){fprintf(stderr,"Failed buffer creation"); exit(1);} fl_begin_offscreen(offscreen_buffer); /* Open the offscreen context */ fl_color(FL_WHITE); fl_rectf(0, 0, w(), h() ); fl_end_offscreen(); /* close the offscreen context */ /* init screen with offscreen buffer */ fl_copy_offscreen(x(), y(), w(), h(), offscreen_buffer, 0,0); } } // draw method /*****************************************************************************/ int canvas::handle(int event) { static char labeltext[100]; int button,x,y; int retvalue = 0; static int x_old,y_old; static int push1st=0; if (!offscreen_buffer) return 1; retvalue = Fl_Box::handle(event); switch (event) { case FL_PUSH: case FL_DRAG: button = Fl::event_button(); x = Fl::event_x(); y = Fl::event_y(); }; switch ( button ) { case 1: // Left button sprintf(labeltext,"Last mouse button= Left | Mouse at %d,%d now",x,y); window()->label(labeltext); retvalue = 1; break; case 3: // Right button sprintf(labeltext,"Last mouse button= Right | Mouse at %d,%d now",x,y); window()->label(labeltext); retvalue = 1; break; } switch(event) { case FL_PUSH: if (push1st == 0) { x_old = x; y_old = y; push1st = 1; break; } else { push1st = 0; /* Open the offscreen context for drawing */ fl_begin_offscreen(offscreen_buffer); if (button==1){ //left mouse button fl_color(FL_RED); fl_line(x_old,y_old,x,y); } else { //right mouse button fl_draw_box(FL_BORDER_FRAME,x_old,y_old,(x-x_old), (y-y_old),FL_BLUE); } fl_end_offscreen(); /* close the offscreen context */ redraw(); } case FL_DRAG: {push1st=0; //clear if dragging /* Open the offscreen context for drawing */ fl_begin_offscreen(offscreen_buffer); fl_color(FL_BLACK); fl_point(x,y); fl_end_offscreen(); // close the offscreen context redraw();} break; default: redraw(); break; } return retvalue; } // handle /*****************************************************************************/ int main (int argc, char **argv) { main_window = new Fl_Double_Window(window_size, window_size, "Drawing with mouse example"); main_window->begin(); // a view of the offscreen, inside the main window static canvas *os_box = new canvas(5,5,(window_size-10),(window_size-10)); main_window->end(); main_window->resizable(os_box); main_window->show(argc, argv); return Fl::run(); } // main I am getting errors with the offscreen functions when compiling this, am I missing a header file? or some linking issue? main.cpp(10) : error C2146: syntax error : missing ';' before identifier 'offscreen_buffer' main.cpp(10) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int main.cpp(10) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int main.cpp(27) : error C3861: 'fl_copy_offscreen': identifier not found main.cpp(31) : error C3861: 'fl_create_offscreen': identifier not found main.cpp(33) : error C3861: 'fl_begin_offscreen': identifier not found main.cpp(36) : error C3861: 'fl_end_offscreen': identifier not found _______________________________________________ fltk mailing list fltk@easysw.com http://lists.easysw.com/mailman/listinfo/fltk
