SimpleAction


Object Hierarchy:

Object hierarchy for SimpleAction

Description:

public class SimpleAction : Object, Action

A SimpleAction is the obvious simple implementation of the Action interface.

This is the easiest way to create an action for purposes of adding it to a SimpleActionGroup.

See also GtkAction.

Example: Application with actions::

public class MyApplication : Application {
private MyApplication () {
Object (application_id: "org.example.application", flags: 0);
set_inactivity_timeout (10000);
add_actions ();
}

private void add_actions () {
SimpleAction simple_action = new SimpleAction ("simple-action", null);
simple_action.activate.connect (() => {
this.hold ();
print ("Simple action %s activated\n", simple_action.get_name ());
this.release ();
});
this.add_action (simple_action);

SimpleAction stateful_action = new SimpleAction.stateful ("toggle-action", null, new Variant.boolean (false));
stateful_action.activate.connect (() => {
print ("Action %s activated\n", stateful_action.get_name ());

this.hold ();
Variant state = stateful_action.get_state ();
bool b = state.get_boolean ();
stateful_action.set_state (new Variant.boolean (!b));
print (@"State change $b -> $(!b)\n");
this.release ();
});
this.add_action (stateful_action);
}

public override void activate () {
this.hold ();
print ("Activated\n");
this.release ();
}

private void describe_and_activate_action (string name) {
VariantType param_type = this.get_action_parameter_type (name);
Variant state = this.get_action_state (name);
bool enabled = this.get_action_enabled (name);

print (@"Action name: $name\n");
string? type = (param_type != null) ? param_type.dup_string () : "<none>";
printf (@"Parameter type: $type\n");

print ("State type: %s\n", (state != null) ? state.get_type_string () : "<none>");
string state_val = (state != null) ? state.print (false) : "<none>";
print (@"State: $state_val\n");
print ("Enabled: $enabled\n");

this.activate_action (name, null);
}

public static int main (string[] args) {
try {
MyApplication app = new MyApplication ();

if (args.length > 1) {
if (args[1] == "--simple-action") {
app.register (null);
app.describe_and_activate_action ("simple-action");
Process.exit (0);
} else if (args[1] == "--toggle-action") {
app.register (null);
app.describe_and_activate_action ("toggle-action");
Process.exit (0);
}
}

int status = app.run (args);
return status;
} catch (Error e) {
print ("Error: %s\n", e.message);
return 0;
}
}
}

valac --pkg gio-2.0 GLib.Application.1.vala

Example: Application with actions::

public class MyApplication : Application {
private MyApplication () {
Object (application_id: "org.example.application", flags: 0);
set_inactivity_timeout (10000);
add_actions ();
}

private void add_actions () {
SimpleAction simple_action = new SimpleAction ("simple-action", null);
simple_action.activate.connect (() => {
this.hold ();
print ("Simple action %s activated\n", simple_action.get_name ());
this.release ();
});
this.add_action (simple_action);

SimpleAction stateful_action = new SimpleAction.stateful ("toggle-action", null, new Variant.boolean (false));
stateful_action.activate.connect (() => {
print ("Action %s activated\n", stateful_action.get_name ());

this.hold ();
Variant state = stateful_action.get_state ();
bool b = state.get_boolean ();
stateful_action.set_state (new Variant.boolean (!b));
print (@"State change $b -> $(!b)\n");
this.release ();
});
this.add_action (stateful_action);
}

public override void activate () {
this.hold ();
print ("Activated\n");
this.release ();
}

private void describe_and_activate_action (string name) {
VariantType param_type = this.get_action_parameter_type (name);
Variant state = this.get_action_state (name);
bool enabled = this.get_action_enabled (name);

print (@"Action name: $name\n");
string? type = (param_type != null) ? param_type.dup_string () : "<none>";
printf (@"Parameter type: $type\n");

print ("State type: %s\n", (state != null) ? state.get_type_string () : "<none>");
string state_val = (state != null) ? state.print (false) : "<none>";
print (@"State: $state_val\n");
print ("Enabled: $enabled\n");

this.activate_action (name, null);
}

public static int main (string[] args) {
try {
MyApplication app = new MyApplication ();

if (args.length > 1) {
if (args[1] == "--simple-action") {
app.register (null);
app.describe_and_activate_action ("simple-action");
Process.exit (0);
} else if (args[1] == "--toggle-action") {
app.register (null);
app.describe_and_activate_action ("toggle-action");
Process.exit (0);
}
}

int status = app.run (args);
return status;
} catch (Error e) {
print ("Error: %s\n", e.message);
return 0;
}
}
}

valac --pkg gio-2.0 GLib.Application.1.vala


Namespace: GLib
Package: gio-2.0

Content:

Creation methods:

Methods:

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Inherited Members: