246 lines
9.4 KiB
XML
246 lines
9.4 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
|
|
<class name="UndoRedo" inherits="Object" version="4.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
|
|
<brief_description>
|
|
General-purpose helper to manage undo/redo operations.
|
|
</brief_description>
|
|
<description>
|
|
UndoRedo works by registering methods and property changes inside "actions".
|
|
Common behavior is to create an action, then add do/undo calls to functions or property changes, then committing the action.
|
|
Here's an example on how to add an UndoRedo action:
|
|
[codeblocks]
|
|
[gdscript]
|
|
var undo_redo = UndoRedo.new()
|
|
|
|
func do_something():
|
|
pass # Put your code here.
|
|
|
|
func undo_something():
|
|
pass # Put here the code that reverts what's done by "do_something()".
|
|
|
|
func _on_my_button_pressed():
|
|
var node = get_node("MyNode2D")
|
|
undo_redo.create_action("Move the node")
|
|
undo_redo.add_do_method(do_something)
|
|
undo_redo.add_undo_method(undo_something)
|
|
undo_redo.add_do_property(node, "position", Vector2(100,100))
|
|
undo_redo.add_undo_property(node, "position", node.position)
|
|
undo_redo.commit_action()
|
|
[/gdscript]
|
|
[csharp]
|
|
private UndoRedo _undoRedo;
|
|
|
|
public override void _Ready()
|
|
{
|
|
_undoRedo = new UndoRedo();
|
|
}
|
|
|
|
public void DoSomething()
|
|
{
|
|
// Put your code here.
|
|
}
|
|
|
|
public void UndoSomething()
|
|
{
|
|
// Put here the code that reverts what's done by "DoSomething()".
|
|
}
|
|
|
|
private void OnMyButtonPressed()
|
|
{
|
|
var node = GetNode<Node2D>("MyNode2D");
|
|
_undoRedo.CreateAction("Move the node");
|
|
_undoRedo.AddDoMethod(new Callable(this, MethodName.DoSomething));
|
|
_undoRedo.AddUndoMethod(new Callable(this, MethodName.UndoSomething));
|
|
_undoRedo.AddDoProperty(node, "position", new Vector2(100, 100));
|
|
_undoRedo.AddUndoProperty(node, "position", node.Position);
|
|
_undoRedo.CommitAction();
|
|
}
|
|
[/csharp]
|
|
[/codeblocks]
|
|
[method create_action], [method add_do_method], [method add_undo_method], [method add_do_property], [method add_undo_property], and [method commit_action] should be called one after the other, like in the example. Not doing so could lead to crashes.
|
|
If you don't need to register a method, you can leave [method add_do_method] and [method add_undo_method] out; the same goes for properties. You can also register more than one method/property.
|
|
If you are making an [EditorPlugin] and want to integrate into the editor's undo history, use [EditorUndoRedoManager] instead.
|
|
</description>
|
|
<tutorials>
|
|
</tutorials>
|
|
<methods>
|
|
<method name="add_do_method">
|
|
<return type="void" />
|
|
<param index="0" name="callable" type="Callable" />
|
|
<description>
|
|
Register a [Callable] that will be called when the action is committed.
|
|
</description>
|
|
</method>
|
|
<method name="add_do_property">
|
|
<return type="void" />
|
|
<param index="0" name="object" type="Object" />
|
|
<param index="1" name="property" type="StringName" />
|
|
<param index="2" name="value" type="Variant" />
|
|
<description>
|
|
Register a [param property] that would change its value to [param value] when the action is committed.
|
|
</description>
|
|
</method>
|
|
<method name="add_do_reference">
|
|
<return type="void" />
|
|
<param index="0" name="object" type="Object" />
|
|
<description>
|
|
Register a reference for "do" that will be erased if the "do" history is lost. This is useful mostly for new nodes created for the "do" call. Do not use for resources.
|
|
[codeblock]
|
|
var node = Node2D.new()
|
|
undo_redo.create_action("Add node")
|
|
undo_redo.add_do_method(add_child.bind(node))
|
|
undo_redo.add_do_reference(node)
|
|
undo_redo.add_undo_method(remove_child.bind(node))
|
|
undo_redo.commit_action()
|
|
[/codeblock]
|
|
</description>
|
|
</method>
|
|
<method name="add_undo_method">
|
|
<return type="void" />
|
|
<param index="0" name="callable" type="Callable" />
|
|
<description>
|
|
Register a [Callable] that will be called when the action is undone.
|
|
</description>
|
|
</method>
|
|
<method name="add_undo_property">
|
|
<return type="void" />
|
|
<param index="0" name="object" type="Object" />
|
|
<param index="1" name="property" type="StringName" />
|
|
<param index="2" name="value" type="Variant" />
|
|
<description>
|
|
Register a [param property] that would change its value to [param value] when the action is undone.
|
|
</description>
|
|
</method>
|
|
<method name="add_undo_reference">
|
|
<return type="void" />
|
|
<param index="0" name="object" type="Object" />
|
|
<description>
|
|
Register a reference for "undo" that will be erased if the "undo" history is lost. This is useful mostly for nodes removed with the "do" call (not the "undo" call!).
|
|
[codeblock]
|
|
var node = $Node2D
|
|
undo_redo.create_action("Remove node")
|
|
undo_redo.add_do_method(remove_child.bind(node))
|
|
undo_redo.add_undo_method(add_child.bind(node))
|
|
undo_redo.add_undo_reference(node)
|
|
undo_redo.commit_action()
|
|
[/codeblock]
|
|
</description>
|
|
</method>
|
|
<method name="clear_history">
|
|
<return type="void" />
|
|
<param index="0" name="increase_version" type="bool" default="true" />
|
|
<description>
|
|
Clear the undo/redo history and associated references.
|
|
Passing [code]false[/code] to [param increase_version] will prevent the version number from increasing when the history is cleared.
|
|
</description>
|
|
</method>
|
|
<method name="commit_action">
|
|
<return type="void" />
|
|
<param index="0" name="execute" type="bool" default="true" />
|
|
<description>
|
|
Commit the action. If [param execute] is [code]true[/code] (which it is by default), all "do" methods/properties are called/set when this function is called.
|
|
</description>
|
|
</method>
|
|
<method name="create_action">
|
|
<return type="void" />
|
|
<param index="0" name="name" type="String" />
|
|
<param index="1" name="merge_mode" type="int" enum="UndoRedo.MergeMode" default="0" />
|
|
<description>
|
|
Create a new action. After this is called, do all your calls to [method add_do_method], [method add_undo_method], [method add_do_property], and [method add_undo_property], then commit the action with [method commit_action].
|
|
The way actions are merged is dictated by [param merge_mode]. See [enum MergeMode] for details.
|
|
</description>
|
|
</method>
|
|
<method name="end_force_keep_in_merge_ends">
|
|
<return type="void" />
|
|
<description>
|
|
Stops marking operations as to be processed even if the action gets merged with another in the [constant MERGE_ENDS] mode. See [method start_force_keep_in_merge_ends].
|
|
</description>
|
|
</method>
|
|
<method name="get_action_name">
|
|
<return type="String" />
|
|
<param index="0" name="id" type="int" />
|
|
<description>
|
|
Gets the action name from its index.
|
|
</description>
|
|
</method>
|
|
<method name="get_current_action">
|
|
<return type="int" />
|
|
<description>
|
|
Gets the index of the current action.
|
|
</description>
|
|
</method>
|
|
<method name="get_current_action_name" qualifiers="const">
|
|
<return type="String" />
|
|
<description>
|
|
Gets the name of the current action, equivalent to [code]get_action_name(get_current_action())[/code].
|
|
</description>
|
|
</method>
|
|
<method name="get_history_count">
|
|
<return type="int" />
|
|
<description>
|
|
Returns how many elements are in the history.
|
|
</description>
|
|
</method>
|
|
<method name="get_version" qualifiers="const">
|
|
<return type="int" />
|
|
<description>
|
|
Gets the version. Every time a new action is committed, the [UndoRedo]'s version number is increased automatically.
|
|
This is useful mostly to check if something changed from a saved version.
|
|
</description>
|
|
</method>
|
|
<method name="has_redo" qualifiers="const">
|
|
<return type="bool" />
|
|
<description>
|
|
Returns [code]true[/code] if a "redo" action is available.
|
|
</description>
|
|
</method>
|
|
<method name="has_undo" qualifiers="const">
|
|
<return type="bool" />
|
|
<description>
|
|
Returns [code]true[/code] if an "undo" action is available.
|
|
</description>
|
|
</method>
|
|
<method name="is_committing_action" qualifiers="const">
|
|
<return type="bool" />
|
|
<description>
|
|
Returns [code]true[/code] if the [UndoRedo] is currently committing the action, i.e. running its "do" method or property change (see [method commit_action]).
|
|
</description>
|
|
</method>
|
|
<method name="redo">
|
|
<return type="bool" />
|
|
<description>
|
|
Redo the last action.
|
|
</description>
|
|
</method>
|
|
<method name="start_force_keep_in_merge_ends">
|
|
<return type="void" />
|
|
<description>
|
|
Marks the next "do" and "undo" operations to be processed even if the action gets merged with another in the [constant MERGE_ENDS] mode. Return to normal operation using [method end_force_keep_in_merge_ends].
|
|
</description>
|
|
</method>
|
|
<method name="undo">
|
|
<return type="bool" />
|
|
<description>
|
|
Undo the last action.
|
|
</description>
|
|
</method>
|
|
</methods>
|
|
<signals>
|
|
<signal name="version_changed">
|
|
<description>
|
|
Called when [method undo] or [method redo] was called.
|
|
</description>
|
|
</signal>
|
|
</signals>
|
|
<constants>
|
|
<constant name="MERGE_DISABLE" value="0" enum="MergeMode">
|
|
Makes "do"/"undo" operations stay in separate actions.
|
|
</constant>
|
|
<constant name="MERGE_ENDS" value="1" enum="MergeMode">
|
|
Makes so that the action's "undo" operations are from the first action created and the "do" operations are from the last subsequent action with the same name.
|
|
</constant>
|
|
<constant name="MERGE_ALL" value="2" enum="MergeMode">
|
|
Makes subsequent actions with the same name be merged into one.
|
|
</constant>
|
|
</constants>
|
|
</class>
|