Hey Everyone,
It looks like I did not setup my event handler params properly. For this
particular signal I needed three params; Actor (Rectangle), ButtonEvent,
Script. In this way I am able to connect my handler in the normal
"clutterScript" way using "ui.connect_signals (ui);". Now I can set the
color of my rectangle using the first param as the object and get the stage
object from the ui I pass in as the third param. Here is the code if anyone
is interested ...
using Clutter;
using GLib;
void button_press (Rectangle actor, ButtonEvent event, Script ui) {
stdout.printf("%s", "button press event");
Stage stage = (Stage)ui.get_object ("stage");
actor.set_color(Color.from_string("white"));
stage.set_color(Color.from_string("red"));
}
int main (string[] args) {
//Stage stage = Stage.get_default();
string filename = "gui_test.json";
if (Clutter.init(ref args) != Clutter.InitError.SUCCESS) {
stdout.printf("%s", "Error Initializing Clutter");
return 1;
}
Script ui = new Script();
uint merge_id = ui.load_from_file (filename);
if (merge_id == 0)
{
stdout.printf("%s", "Error Loading ClutterScript");
return 1;
}
ui.connect_signals (ui);
Stage stage = (Stage)ui.get_object ("stage");
/* make the objects in the script available to all signals
* by passing the script as the second argument
* to clutter_script_connect_signals()
*/
stage.show_all();
Clutter.main();
return 0;
}
[ClutterScript UI]
[
{
"id" : "stage",
"type" : "ClutterStage",
"width" : 300,
"height" : 300,
"color" : "#335",
"signals" : [
{ "name" : "hide", "handler" : "clutter_main_quit" }
],
"children" : [ "rectangle" ]
},
{
"id" : "rectangle",
"type" : "ClutterRectangle",
"width" : 200,
"height" : 200,
"x" : 50,
"y" : 50,
"color" : "#a90",
"rotation-center-z-gravity" : "center",
"reactive" : true,
"signals" : [
{ "name" : "button-press-event", "handler" : "button_press" }
],
"actions" : [
{
"type" : "ClutterClickAction",
"signals" : [
{ "name" : "clicked", "handler" : "foo_button_clicked_cb" }
]
}
]
}
]
On Thu, Jan 26, 2012 at 5:06 AM, tomw <[email protected]> wrote:
> Hi,
>
> if you want to pass user data to a signal handler you should connect the
> signal in the code rather than by the script. The vala code may look
> like this:
>
> using Clutter;
> using GLib;
>
> public bool button_press (Actor actor, Script ui) {
> stdout.printf("button press event");
> Rectangle rect = (Rectangle)ui.get_object ("rectangle");
> rect.set_color(Color.from_string("white"));
>
> return true;
> }
>
> public bool key_pressed (KeyEvent event) {
> stdout.printf ("Key pressed : %d \n", event.hardware_keycode);
> Clutter.main_quit ();
>
> return true;
>
> }
>
> int main (string[] args) {
>
> //Stage stage = Stage.get_default();
> string filename = "gui_test.json";
>
> if (Clutter.init(ref args) != Clutter.InitError.SUCCESS) {
> stdout.printf("Error Initializing Clutter");
> return 1;
> }
>
> Script ui = new Script();
> uint merge_id = ui.load_from_file (filename);
> if (merge_id == 0)
> {
> stdout.printf("%s", "Error Loading ClutterScript");
> return 1;
> }
>
> //ui.connect_signals (null);
>
> Stage stage = (Stage)ui.get_object ("stage");
> stage.button_press_event.connect (() => {button_press (stage, ui);
> return true;});
> stage.key_press_event.connect (key_pressed);
> stage.show_all();
> Clutter.main();
> return 0;
> }
>
>
> and the json-file (slightly simpler) like this:
>
> [
> {
> "id" : "stage",
> "type" : "ClutterStage",
> "width" : 300,
> "height" : 300,
> "color" : "#335",
> "signals" : [
> { "name" : "hide", "handler" : "clutter_main_quit" }
> ],
> "children" : [
> {
> "id" : "rectangle",
> "type" : "ClutterRectangle",
> "width" : 200,
> "height" : 200,
> "x" : 50,
> "y" : 50,
> "color" : "#a90",
> "rotation-center-z-gravity" : "center",
> "reactive" : true
> }
>
> ]
> }
> ]
>
>
>
>
> On Mi, 2012-01-25 at 16:55 -0500, Brian Duffy wrote:
> > using Clutter;
> > using GLib;
> >
> >
> > bool button_press (ButtonEvent event, Script ui) { // wrong
> > stdout.printf("%s", "button press event");
> > Rectangle rect = (Rectangle)ui.get_object ("rectangle"); // this
> > segfaults
> > //rect.set_color(Color.from_string("white"));
> > return true;
> > }
> >
> >
> > int main (string[] args) {
> >
> > //Stage stage = Stage.get_default();
> > string filename = "gui_test.json";
> >
> > if (Clutter.init(ref args) != Clutter.InitError.SUCCESS) {
> > stdout.printf("%s", "Error Initializing Clutter");
> > return 1;
> > }
> >
> > Script ui = new Script();
> > uint merge_id = ui.load_from_file (filename);
> > if (merge_id == 0)
> > {
> > stdout.printf("%s", "Error Loading ClutterScript");
> > return 1;
> > }
> >
> > ui.connect_signals (ui);
> >
> > Stage stage = (Stage)ui.get_object ("stage");
> > /* make the objects in the script available to all signals
> > * by passing the script as the second argument
> > * to clutter_script_connect_signals()
> > */
> >
> > stage.show_all();
> >
> > Clutter.main();
> >
> > return 0;
> > }
>
>
--
Duff
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