fltk/examples/shapedwindow.cxx

126 lines
3.2 KiB
C++

//
// "$Id$"
//
// shapedwindow example source file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2014 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 to:
//
// http://www.fltk.org/str.php
//
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Box.H>
#include <FL/Fl.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Image.H>
#include <FL/Fl_Tiled_Image.H>
#include <FL/Fl_Image_Surface.H>
#include "test/pixmaps/tile.xpm"
void cb(Fl_Widget *w, void *) {
w->window()->hide();
}
class dragbox : public Fl_Box {
public:
dragbox(int x, int y, int w, int h, const char *t=0) : Fl_Box(x,y,w,h,t) {};
int handle(int event) {
static int fromx, fromy, winx, winy;
if (event == FL_PUSH) {
fromx = Fl::event_x_root();
fromy = Fl::event_y_root();
winx = window()->x_root();
winy = window()->y_root();
return 1;
}
else if (event == FL_DRAG) {
int deltax = Fl::event_x_root() - fromx;
int deltay = Fl::event_y_root() - fromy;
window()->position(winx + deltax, winy + deltay);
return 1;
}
return Fl_Box::handle(event);
}
};
const float factor = 1.3;
void shrink(Fl_Widget *wdgt, void *data)
{
Fl_Window *win = wdgt->window();
int old = win->w();
win->size(old/factor, old/factor);
if (win->w() <= *(int*)data) wdgt->deactivate();
}
void enlarge(Fl_Widget *wdgt, void *data)
{
Fl_Window *win = wdgt->window();
int old = win->w();
win->size(old*factor, old*factor);
((Fl_Widget*)data)->activate();
}
Fl_RGB_Image* prepare_shape(int w)
{
// draw a white circle with a hole in it on black background
Fl_Image_Surface *surf = new Fl_Image_Surface(w, w);
Fl_Surface_Device::push_current(surf);
fl_color(FL_BLACK);
fl_rectf(-1, -1, w+2, w+2);
fl_color(FL_WHITE);
fl_pie(2,2,w-4,w-4,0,360);
fl_color(FL_BLACK);
fl_pie(0.7*w,w/2,w/4,w/4,0,360);
Fl_RGB_Image* img = surf->image();
delete surf;
Fl_Surface_Device::pop_current();
return img; // return white image on black background
}
int main(int argc, char **argv) {
int dim = 200;
Fl_Double_Window *win = new Fl_Double_Window(100, 100, dim, dim, "Testing1");
Fl_RGB_Image *img = prepare_shape(dim);
win->shape(img);
dragbox *box = new dragbox(0, 0, win->w(), win->h());
box->image(new Fl_Tiled_Image(new Fl_Pixmap((const char * const *)tile_xpm)));
Fl_Group *g = new Fl_Group(10, 20, 80, 20);
g->box(FL_NO_BOX);
Fl_Button *b = new Fl_Button(10, 20, 80, 20, "Close");
b->callback(cb);
g->end();
g->resizable(NULL);
g = new Fl_Group(60, 70, 80, 40, "Drag me");
g->box(FL_NO_BOX);
g->align(FL_ALIGN_TOP);
Fl_Button *bs = new Fl_Button(60, 70, 80, 20, "Shrink");
bs->callback(shrink, &dim);
bs->deactivate();
Fl_Button *be = new Fl_Button(60, 90, 80, 20, "Enlarge");
be->callback(enlarge, bs);
g->end();
g->resizable(NULL);
win->end();
win->resizable(win);
win->show(argc, argv);
Fl::run();
delete win;
return 0;
}
//
// End of "$Id$".
//