ede/eimage/eimage.cpp

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#include <fltk/run.h>
#include <fltk/Window.h>
#include <fltk/DoubleBufferWindow.h>
#include <fltk/Button.h>
#include <fltk/SharedImage.h>
#include <fltk/ScrollGroup.h>
#include <fltk/Widget.h>
#include <fltk/filename.h>
#include <fltk/events.h>
#include <fltk/PopupMenu.h>
#include <fltk/Item.h>
#include <fltk/Divider.h>
#include <fltk/Divider.h>
#include <fltk/file_chooser.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace fltk;
// Automatic detection of image type still doesn't work in fltk :(
static struct {
const char* filename;
SharedImage* (*func)(const char*, const uchar*);
} supported[] = {
{ "*.png", pngImage::get},
{"*.jpg", jpegImage::get},
{"*.gif", gifImage::get},
{"*.bmp", bmpImage::get},
{"*.xpm", xpmFileImage::get},
{0, 0}
};
// Making these global vastly simplifies the code
// cause they're used a lot
// The proper thing to do is to make the whole program one big class
char filename[PATH_MAX], directory[PATH_MAX];
Window* w;
class CenteredInScroll;
CenteredInScroll* c;
float zoomfactor;
bool autozoom=false;
// Variables used in nextpic & prevpic
dirent **files;
int nfiles;
// Forward declaration of funcs for use from event handler
void nextpic();
void prevpic();
void loadimage();
void newdir();
// Callbacks for popup menu
void next_cb(Widget*) { nextpic(); }
void prev_cb(Widget*) { prevpic(); }
void open_cb(Widget*) {
const char* f = file_chooser("Choose image or directory","Image Files (*.{bmp,gif,jpg,png,xpm})",directory);
if (!f) return;
strncpy(filename,f,PATH_MAX);
newdir();
loadimage();
}
void manage_cb(Widget* b) {} // call file manager
void fullscr_cb(Widget* b) {
static bool isfull=false;
static int X,Y,W,H;
if (isfull) {
w->fullscreen_off(X,Y,W,H);
isfull=false;
} else {
X=w->x(); Y=w->y(); W=w->w(); H=w->h();
w->fullscreen();
isfull=true;
}
}
void exit_cb(Widget* b) { exit(0); }
void zoomin_cb(Widget* b) {
if (zoomfactor>=1) zoomfactor += 0.2; else zoomfactor += zoomfactor/5;
autozoom=false;
loadimage();
}
void zoomout_cb(Widget* b) {
if (zoomfactor>=1) zoomfactor -= 0.2; else zoomfactor -= zoomfactor/5;
autozoom=false;
loadimage();
}
void zoomrestore_cb(Widget* b) { zoomfactor = 1; autozoom=false; loadimage(); }
void zoomauto_cb(Widget *b) { autozoom = !autozoom; loadimage(); }
class CenteredInScroll : public Button {
private:
PopupMenu* popup;
public:
CenteredInScroll(int x, int y, int w, int h, const char*l = 0)
: Button(x,y,w,h,l) {
popup = new PopupMenu(0, 0, 0, 0);
if(popup->parent())
popup->parent()->remove(popup);
popup->parent(0);
popup->type(PopupMenu::POPUP3);
popup->begin();
{Item *i = new Item("&Open...");
i->callback(open_cb);
i->shortcut(CTRL+'o');
}
{Item *i = new Item("&Manage...");
i->callback(manage_cb);
}
new Divider();
{Item *i = new Item("&Next");
i->callback(next_cb);
i->shortcut(DownKey);
}
{Item *i = new Item("&Previous");
i->callback(prev_cb);
i->shortcut(UpKey);
}
new Divider();
{Item *i = new Item("&Zoom in");
i->callback(zoomin_cb);
i->shortcut('+');
}
{Item *i = new Item("Zoom &out");
i->callback(zoomout_cb);
i->shortcut('-');
}
{Item *i = new Item("Zoom &auto");
i->callback(zoomauto_cb);
i->shortcut(CTRL+'a');
}
{Item *i = new Item("&Restore");
i->callback(zoomrestore_cb);
i->shortcut('/');
}
new Divider();
{Item *i = new Item("&Fullscreen");
i->callback(fullscr_cb);
i->shortcut(F11Key);
}
new Divider();
{Item *i = new Item("A&bout");
i->callback(exit_cb);
}
{Item *i = new Item("&Exit");
i->callback(exit_cb);
i->shortcut(EscapeKey);
}
popup->end();
}
virtual void draw() {
int ix, iy;
if (w() < parent()->w()) { ix=((parent()->w() - w())/2); } else { ix=0; }
if (h() < parent()->h()) { iy=((parent()->h() - h())/2); } else { iy=0; }
Image *i = (Image*)image();
i->draw(Rectangle(ix,iy,w(),h()));
}
virtual int handle(int event) {
if (event == KEY) {
int key = event_key();
const char* text = event_text(); // needed to detect some keys
if (key == LeftKey || key == UpKey) prevpic();
else if (key == RightKey || key == DownKey) nextpic();
// Shortcuts from popup menu wont work unless we define them here
// The 'this' is just to pass something to callback, it wont be used
else if (key == CTRL+'o') open_cb(this);
else if (strcmp(text,"+")==0 || key == AddKey) zoomin_cb(this);
else if (strcmp(text,"-")==0 || key == SubtractKey) zoomout_cb(this);
else if (strcmp(text,"/")==0 || key == DivideKey) zoomrestore_cb(this);
else if (key == CTRL+'a') zoomauto_cb(this);
else if (key == F11Key) fullscr_cb(this);
}
else if (event == PUSH) {
if(event_button()==3) {
popup->popup();
return 1;
}
}
return Button::handle(event);
}
};
// Directory changed, get new directory from filename
void newdir() {
int p=0;
for (int i=0; i<strlen(filename); i++)
if (filename[i] == '/') p=i;
// There must be at least one '/'
strncpy(directory, filename, p);
directory[p]='\0';
// make prevnext() reread directory
nfiles=0;
}
// Load the image given in char[] filename
void loadimage() {
fprintf(stderr, "Loadimage() - file: %s\n",filename);
// Load image
SharedImage *im;
for (int j=0; supported[j].filename; j++)
if (filename_match(filename,supported[j].filename)) {
im = supported[j].func(filename,0);
break;
}
int W,H;
im->measure(W,H); // Should this wait until image is loaded?
if (autozoom) {
// Adjust zoom factor so picture fits on screen
// When switch to manual zooming, this factor will be used
float pw=c->parent()->w()+1, ph=c->parent()->h()+1;
// use float to avoid rounding
if (pw/W < ph/H) zoomfactor=pw/W; else zoomfactor=ph/H;
}
c->w((int)W*zoomfactor-1); // cast to int and -1 help avoid
c->h((int)H*zoomfactor-1); // scrollbars when autozoom is on
c->image(im);
c->parent()->relayout(); // remove scrollbars if necessary
c->parent()->redraw(); // remove traces of old picture
c->label(""); // clear any previous labels
char tmp[PATH_MAX]; // set window title
if (zoomfactor==1)
snprintf(tmp,PATH_MAX,"%s (%dx%d) - View picture",filename_name(filename),W,H);
else
snprintf(tmp,PATH_MAX,"%s (%dx%d) - zoom %1.1fx - View picture",filename_name(filename),W,H,zoomfactor);
w->label(strdup(tmp));
}
// Get next/previous picture file in directory d
// (universal func. to be called from nextpic() and prevpic()
void prevnext(int direction) {
fprintf(stderr, "Nextpic() - file: %s dir: %s direction: %d\n",filename,directory,direction);
if (nfiles == 0) { // read directory
nfiles = filename_list(directory,&files);
}
// Select next picture after current
bool found=false;
const char* justname = filename_name(filename);
// this basically means: if direction is 1 go from first to last, else from last to first
for (int i=(direction?0:nfiles-1); (direction?i<nfiles:i>=0); i+=(direction?1:-1)) {
if (strncmp(justname,files[i]->d_name,PATH_MAX) == 0) {
found=true;
continue;
}
if (found) {
for (int j=0; supported[j].filename; j++) {
if (filename_match(files[i]->d_name,supported[j].filename)) {
snprintf(filename,PATH_MAX,"%s/%s",directory,files[i]->d_name);
loadimage();
return;
}
}
}
}
// Current picture not found, give first in directory
for (int i=(direction?0:nfiles-1); (direction?i<nfiles:i>=0); i+=(direction?1:-1)) {
for (int j=0; supported[j].filename; j++) {
if (filename_match(files[i]->d_name,supported[j].filename)) {
snprintf(filename,PATH_MAX,"%s/%s",directory,files[i]->d_name);
loadimage();
return;
}
}
}
// Nothing found...
fprintf(stderr, "Nextpic() - nothing found\n");
char tmp[PATH_MAX];
snprintf(tmp,PATH_MAX,"No pictures in directory %s",directory);
c->label(strdup(tmp));
// Position label on center and redraw everything
c->w(1); c->h(1);
c->x(c->parent()->w()/2);
c->y(c->parent()->h()/2);
c->redraw();
c->parent()->relayout();
c->parent()->redraw();
// Window title
snprintf(tmp,PATH_MAX,"View picture - nothing found in %s",directory);
w->label(strdup(tmp));
}
void nextpic() { prevnext(1); }
void prevpic() { prevnext(0); }
int main (int argc, char **argv) {
filename[0]='\0'; directory[0]='\0'; zoomfactor=1;
w = new Window(200, 200, "View picture");
w->set_vertical();
w->set_double_buffer();
w->begin();
{ScrollGroup* g = new ScrollGroup(0, 0, 200, 200);
//g->set_vertical();
// Group::current()->resizable(o);
g->box(FLAT_BOX);
g->color(GRAY05);
// g->color(WHITE);
g->align(ALIGN_RIGHT);
g->resize_align(ALIGN_RIGHT);
g->begin();
{c = new CenteredInScroll(0,0,200,200);
g->align(ALIGN_LEFT|ALIGN_TOP);
c->box(NO_BOX);
c->focusbox(NO_BOX);
g->color(GRAY05);
c->labelcolor(WHITE);
c->labelsize(14);
c->tooltip("Right click for menu");
c->take_focus();
}
g->end();
}
w->end();
w->resizable(w);
// Analyze command line
if (argc==1) { // No params
strncpy (directory, getenv("HOME"), PATH_MAX);
nextpic();
} else if (filename_isdir(argv[1])) { // Param is directory
strncpy (directory, argv[1], PATH_MAX);
nextpic();
argc--; argv++; // ignore this param and forward rest to fltk
} else { // Param is file
if (argv[1][0] == '~' && argv[1][1] == '/') // expand home dir
snprintf (filename, PATH_MAX, "%s/%s", getenv("HOME"), argv[1]+2);
else if (argv[1][0] != '/') // relative filename
snprintf (filename, PATH_MAX, "%s/%s", getenv("PWD"), argv[1]);
else // absolute filename
strncpy (filename, argv[1], PATH_MAX);
if (!filename_exist(argv[1])) {
char tmp[PATH_MAX];
snprintf(tmp,PATH_MAX,"File not found - %s",filename);
c->label(tmp);
} else
loadimage();
newdir(); // rebuild char[] directory
argc--; argv++; // ignore this param and forward rest to fltk
}
w->show(argc,argv);
return run();
}