Sample Code 211: How to gray out an entry field? |
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Written by kksou
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Monday, 02 April 2007 |
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Problem Suppose you would like to gray out some of the entry fields to make them inactive as shown below:
Solution
Sample Code 1
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 200);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
$vbox->pack_start(new Title("Gray out an entry field", 30), 0);
$entry[0] = new GtkEntry();
$entry[1] = new GtkEntry();
$radiogrp = new RadioGroup (
array('Square'=>0,
'Radius'=>1),
$entry);
$vbox->pack_start($radiogrp, 0);
$vbox->pack_start(new GtkLabel(), 0);
$vbox->pack_start($hbox = new GtkHBox(), 0);
$hbox->pack_start(new GtkLabel('Please enter width: '), 0);
$hbox->pack_start($entry[0], 0);
$vbox->pack_start($hbox = new GtkHBox(), 0);
$hbox->pack_start(new GtkLabel('Please enter radius: '), 0);
$hbox->pack_start($entry[1], 0);
$window->show_all();
Gtk::main();
class SpinButton extends GtkSpinButton {
public function SpinButton() {
parent::__construct();
$this->set_editable(0);
}
}
class RadioGroup_base extends GtkVBox {
public function RadioGroup_base($options) {
parent::__construct();
$radio0 = null;
$i = 0;
foreach($options as $label=>$value) {
$radio = new GtkRadioButton($radio0, $label);
if ($i==0) $radio0 = $radio;
$radio->connect('toggled', array(&$this, 'on_toggle'), $value);
$this->pack_start($radio, 0);
++$i;
}
$radio0->toggled();
}
public function on_toggle($radio, $value) {}
}
class RadioGroup extends RadioGroup_base {
public function RadioGroup($options, $entry) {
$this->entry = $entry;
parent::__construct($options);
}
public function on_toggle($radio, $value) {
$label = $radio->child->get_label();
$active = $radio->get_active();
if ($active) {
echo "radio button pressed: $label (value = $value)\n";
if ($value==0) {
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Explanation
- User has selected square. So we turn on width and turn off radius.
- User has selected circle. So we turn off width and turn on radius.
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