Add tween seek/repeat support

Add tween demo

misc/tween/engine.cfg

@@ -0,0 +1,10 @@
+[application]
+
+name="Tween Demo"
+main_scene="res://main.xml"
+icon="icon.png"
+
+[display]
+
+stretch_mode="2d"
+stretch_aspect="keep_width"

misc/tween/main.gd

@@ -0,0 +1,127 @@
+
+extends Control
+
+# member variables here, example:
+# var a=2
+# var b="textvar"
+
+var trans = ["linear", "sine", "quint", "quart", "quad", "expo", "elastic", "cubic", "circ", "bounce", "back"]
+var eases = ["in", "out", "in_out", "out_in"]
+var modes = ["move", "color", "scale", "rotate", "repeat", "pause"]
+
+var state = {
+	trans = Tween.TRANS_LINEAR,
+	eases = Tween.EASE_IN,
+}
+
+func _ready():
+	for index in range(trans.size()):
+		var name = trans[index]
+		get_node("trans/" + name).connect("pressed", self, "on_trans_changed", [name, index])
+	
+	for index in range(eases.size()):
+		var name = eases[index]
+		get_node("eases/" + name).connect("pressed", self, "on_eases_changed", [name, index])
+	
+	for index in range(modes.size()):
+		var name = modes[index]
+		get_node("modes/" + name).connect("pressed", self, "on_modes_changed", [name])
+	
+	get_node("color/color_from").set_color(Color(1, 0, 0, 1))
+	get_node("color/color_from").connect("color_changed", self, "on_color_changed")
+	
+	get_node("color/color_to").set_color(Color(0, 1, 1, 1))
+	get_node("color/color_to").connect("color_changed", self, "on_color_changed")
+	
+	get_node("trans/linear").set_pressed(true)
+	get_node("eases/in").set_pressed(true)
+	get_node("modes/move").set_pressed(true)
+	get_node("modes/repeat").set_pressed(true)
+	
+	reset_tween()
+	
+	# Initalization here
+	pass
+
+func on_trans_changed(name, index):
+	for index in range(trans.size()):
+		var pressed = trans[index] == name
+		var btn = get_node("trans/" + trans[index])
+		
+		btn.set_pressed(pressed)
+		btn.set_ignore_mouse(pressed)
+	
+	state.trans = index
+	reset_tween()
+	
+func on_eases_changed(name, index):
+	for index in range(eases.size()):
+		var pressed = eases[index] == name
+		var btn = get_node("eases/" + eases[index])
+		
+		btn.set_pressed(pressed)
+		btn.set_ignore_mouse(pressed)
+	
+	state.eases = index
+	reset_tween()
+	
+func on_modes_changed(name):
+	var tween = get_node("tween")
+	if name == "pause":
+		if get_node("modes/pause").is_pressed():
+			tween.stop_all()
+			get_node("timeline").show()
+		else:
+			tween.resume_all()
+			get_node("timeline").hide()
+	else:
+		reset_tween()
+	
+func on_color_changed(color):
+	reset_tween()
+	
+func reset_tween():
+	var tween = get_node("tween")
+	tween.reset_all()
+	tween.remove_all()
+	
+	var sprite = get_node("tween/area/sprite")
+	
+	if get_node("modes/move").is_pressed():
+		tween.interpolate_method(sprite, "set_pos", Vector2(0,0), Vector2(736, 184), 2, state.trans, state.eases)
+	
+	if get_node("modes/color").is_pressed():
+		tween.interpolate_method(sprite, "set_modulate", get_node("color/color_from").get_color(), get_node("color/color_to").get_color(), 2, state.trans, state.eases)
+	else:
+		sprite.set_modulate(Color(1, 1, 1, 1))
+	
+	if get_node("modes/scale").is_pressed():
+		tween.interpolate_method(sprite, "set_scale", Vector2(0.5,0.5), Vector2(1.5, 1.5), 2, state.trans, state.eases)
+	
+	if get_node("modes/rotate").is_pressed():
+		tween.interpolate_method(sprite, "set_rot", 0.0, 6.28, 2, state.trans, state.eases)
+	
+	tween.set_repeat(get_node("modes/repeat").is_pressed())
+	tween.start()
+	
+	if get_node("modes/pause").is_pressed():
+		tween.stop_all()
+		get_node("timeline").show()
+		get_node("timeline").set_value(0)
+	else:
+		tween.resume_all()
+		get_node("timeline").hide()
+	
+func _on_tween_step( object, key, elapsed, value ):
+	var timeline = get_node("timeline")
+	var ratio = 100 * (elapsed / 2)
+	timeline.set_value(ratio)
+	
+
+func _on_timeline_value_changed( value ):
+	if !get_node("modes/pause").is_pressed():
+		return
+	
+	var tween = get_node("tween")
+	tween.seek(2.0 * value / 100)
+