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[STR New]
Link: http://www.fltk.org/str.php?L2449
Version: 1.3-current
Link: http://www.fltk.org/str.php?L2449
Version: 1.3-current
// A trival example illustration how to load an image
//
// Step 1. Compile using: flt-config --use-images --compile pngtest.cxx
//
// Step 2. Run: pngtest
// The program opens tux.png (in the CWD).
//
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Scroll.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Value_Output.H>
#include <FL/Fl_Shared_Image.H> // Image I/O
#include <FL/fl_ask.H> // fl_alert, fl_choice
#include <FL/filename.H> // fl_filename_name
#include <string.h> // strncmp, strlen, etc.
#include <stdio.h> // snprintf
// Widget group that displays the image. Fl_Group holds
// the Fl_Box and the Fl_DND_Box. This way Fl_DND_Box
// will resize according to Fl_Box
Fl_Box *box = (Fl_Box*)0;
Fl_Value_Output *width = (Fl_Value_Output*)0;
Fl_Value_Output *height = (Fl_Value_Output*)0;
Fl_Value_Output *depth = (Fl_Value_Output*)0;
void file_close()
{
Fl_Shared_Image *img = (Fl_Shared_Image*)box->image();
if(!img)
return; // no image displayed
box->image(0);
// The image is shared, release until no more references
while(img->refcount())
img->release();
}
void file_open(const char *fpath)
{
file_close();
Fl_Shared_Image *img = Fl_Shared_Image::get(fpath);
if(!img)
{
fl_alert("Failed to load image: %s", fpath);
return;
}
box->size(img->w(), img->h());
box->image(img);
width->value(img->w());
height->value(img->h());
depth->value(img->d());
Fl::redraw();
}
int main(int argc, char *argv[])
{
Fl::visual(FL_DOUBLE | FL_INDEX);
Fl::get_system_colors();
fl_register_images();
Fl::scheme("gtk+");
Fl_Double_Window *wnd = new Fl_Double_Window(10, 10, 500, 445, "Open
tux.png");
{
{
Fl_Scroll *o = new Fl_Scroll(15, 15, 470, 315, 0);
o->box(FL_ENGRAVED_BOX);
{
box = new Fl_Box(17, 17, 468, 313, 0);
box->box(FL_FLAT_BOX);
box->align(FL_ALIGN_INSIDE | FL_ALIGN_CENTER);
}
o->end();
Fl_Group::current()->resizable(o);
}
width = new Fl_Value_Output(45, 340, 100, 30, "Width:");
width->align(FL_ALIGN_LEFT);
height = new Fl_Value_Output(200, 340, 100, 30, "Height:");
height->align(FL_ALIGN_LEFT);
depth = new Fl_Value_Output(350, 340, 100, 30, "Depth:");
depth->align(FL_ALIGN_LEFT);
}
wnd->end();
wnd->show(argc, argv);
file_open("tux.png");
return Fl::run();
}
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