GtkProgressBar example

[beidlerj]

Hi all,

Can anyone point me to a good example of using a GtkProgressBar? All the examples I can find through Google seem to be for PHP-Gtk1, and, as near as I can tell, this class has changed quite a bit in PHP-Gtk2. Besides that, all the examples just iterate through a for loop and use a timeout as their "operation in progress."

I would like to do something like take a list of files and display a progress bar while the lot of them are being copied to another server.

Thanks,

Jeff

[cweiske]

The PEAR_Frontend_Gtk2 package has a download dialog that uses a progress bar. You could look there.
http://pear.php.net/package/PEAR_Frontend_Gtk2

[beidlerj]

Thanks for the link. The code is a little above my skill level, but I got enough out of it to make my own progress bar work.

I don't really understand what goes on when you have

[cweiske]

[beidlerj]

That helps a little bit. I guess I was thinking about the gtk::main() function incorrectly, probably a leftover idea from C/C++ programming. I had been thinking that gtk::main() meant "start the program", but I guess the PHP interpreter starts execution from the first line of code not in a function, not when it sees the main(). So now, if I understand correctly, gtk::main() is what executes the statements you queued up, telling PHP to create a new window, make it x by y big, fill it with z, then show it, etc. All you were doing before calling gtk::main() was adding those things to the 'to-do' list. Right?

I'm still confused about how the events_pending can be checked if there is still an operation in progress. For example, in my pseudocode above, the bar->set_fraction() adds the bar redraw to the queue of things to be drawn and then the main_iteration() actually does the redraw, correct? But doesn't PHP have to wait for the copy file to server operation to return before it can queue the redraw, check for events, and execute the redraw? How does it happen while the copy statement is still running?

[cweiske]

[beidlerj]

Okay, I understand. Thanks for the help.

[rgljr]

Here is a working Progress Bar Test Program that works for me.

<?php
if(!class_exists('gtk'))
{
die("Please load the php-gtk2 module in your php.ini\r\n");
}
function quit_routine($dialog)
{
$dialog->destroy();
}
function test_progress() {
$window1 = new GtkWindow();
$window1->set_title("Progress");
$window1->set_size_request(200, 35);
$progress_bar = new GtkProgressBar();
$progress_bar->set_orientation(Gtk::PROGRESS_LEFT_TO_RIGHT);
$window1->add($progress_bar);
$window1->connect("destroy", "quit_routine");
$window1->show_all();

for($i=0;$i<100;$i++) {
$progress_bar->set_fraction((float)($i/100.0));
$progress_bar->set_text($i.'% Complete');
sleep(1);
while (Gtk::events_pending()) {
Gtk::main_iteration();
}
}
quit_routine($window1);
}
$window = new GtkWindow();
$window->set_title("Progress Bar Test");
$window->set_size_request(200, 100);
$button = &new GtkButton('Click for Progress Bar');
$button->connect_simple('clicked', 'test_progress');
$button->show();
$window->add($button);
$window->connect_simple("destroy", array("gtk", "main_quit"));
$window->show_all();
Gtk::main();
?>

[Quinkink]

Hello to all,
Thank-you for Gnope... this is my first post.
I have no claim to great programming skills...

My question is about the :
while(gtk::events_pending()) gtk::main_iteration();
loop... How do you quit it correctly?

I get :
Gtk-CRITICAL **: gtk_main_quit: assertion `main_loops != NULL' failed
when I use GTK::main_quit(); with the loop still going.

I'm using a function to have a watch ticking over in a label...

public function update_time(){
while($this->clock){
$text=Date('l d F o - H:i:s');
$this->clock->set_text($text);
while(gtk::events_pending()) gtk::main_iteration();
}
}

Thanks.

[cweiske]

[Quinkink]

I'm not sure I get it...
I've made a simple class to emulate my code.
When I close the main window I get the
'main-loops!=NULL' error
thanks for looking,
Quinkink.


<?php
Class Example extends GtkWindow{
private $clock;
/********************************************/
function __construct(){
parent::__construct();
$this->connect('destroy', array($this,'rip'));
$this->set_title(__CLASS__);
//$this->set_border_width(10);

$this->add($this->__create_box());
$this->show_all();
$this->update_time();
}
/********************************************/
private function __create_box(){
$frame = new GtkFrame();
$this->clock = new GtkLabel(TRUE);
$frame->add($this->clock);

return $frame;
}
/*********************************************/
private function update_time(){
while($this->clock){
$time=Date('l d F o - H:i:s');
$this->clock->set_text($time);
while(gtk::events_pending()){gtk::main_iteration();}
}
}
/*********************************************/
public function rip(){
GTK::main_quit();
}
}
new Example();
Gtk::main();
?>

[Quinkink]

OK,
I must be missing some logic... I still get
Gtk-CRITICAL **: gtk_main_quit: assertion `main_loops != NULL' failed
when I quit my application.

Am I doing this a complicated way? Should I be using :
while(gtk::events_pending()) gtk::main_iteration();
to do this? Does anyone have a tip on how to have a clock ticking over in a corner of the main window?

Maybe I'm now posting in the wrong thread...

[cweiske]

[Quinkink]

<?php
Class Example extends GtkWindow{
private $timeout;
private $clock;
/********************************************/
function __construct(){
parent::__construct();
$this->connect('destroy', array($this,'rip'));
$this->set_title(__CLASS__);
//$this->set_border_width(10);

$this->add($this->__create_box());
$this->show_all();
$this->timeout = Gtk::timeout_add(100,array($this,'update_time'));
}
/********************************************/
private function __create_box(){
$frame = new GtkFrame();
$this->clock = new GtkLabel(TRUE);
$frame->add($this->clock);

return $frame;
}
/*********************************************/
public function update_time(){
Gtk::timeout_remove($this->timeout);
while($this->clock){
$time=Date('l d F o - H:i:s');
$this->clock->set_text($time);
while(gtk::events_pending()){gtk::main_iteration();}
}
}
/*********************************************/
public function rip(){
$this->clock=FALSE;
GTK::main_quit();
}
}
new Example();
Gtk::main();
?>
Thanks for the tip, I guess the time out gives the main loop a chance to start befor the other loop kicks in. Here is the updated code in case it helps beginers like me...
Thanks again,

[scott]