Containers

Containers
	Chapter 4. Actors

Some clutter actors implement the clutter.Container interface. These actors can contain child actors and may position them in relation to each other, for instance in a list or a table formation. In addition, transformations or property changes may be applied to all children. Child actors can be added to a container with the container.add() function.

The main clutter.Stage is itself a container, allowing it to contain all the child actors. The only other container in Core PyClutter is clutter.Group, which can contain child actors, with positions relative to the parent clutter.Group. Scaling, rotation and clipping of the group applies to the child actors, which can simplify your code.

Additional PyClutter containers can be found in the Tidy toolkit library. See also the Implementing Containers section.

Container Reference

Group Reference

Example

The following example shows the use of the clutter.Group container, with two child actors being rotated together.

Figure 4.3. Group

Source Code

File: main.py

import sys

import clutter


def main():
    stage_color = clutter.Color(0, 0, 0, 255)
    actor_color = clutter.Color(255, 255, 255, 153)

    # Get the stage and set its size and color
    stage = clutter.Stage()
    stage.set_size(200, 200)
    stage.set_color(stage_color)

    # Add a group to the stage
    group = clutter.Group()
    group.set_position(40, 40)
    stage.add(group)
    group.show()

    # Add a rectangle to the group
    rect = clutter.Rectangle(actor_color)
    rect.set_size(50, 50)
    rect.set_position(0, 0)
    group.add(rect)
    rect.show()

    # Add a label to the group
    label = clutter.Text("Sans 9", "Some Text", actor_color)
    label.set_position(0, 60)
    group.add(label)
    label.show()

    # Scale the group 120% along the x axis
    group.set_scale(3.0, 1.0)

    # Rotate it around the z axis
    group.set_rotation(clutter.Z_AXIS, 10, 0, 0, 0)

    # Show the stage
    stage.connect("destroy", clutter.main_quit)
    stage.show_all()

    # Start the main loop, so we can respond to events
    clutter.main()


if __name__ == '__main__':
    sys.exit(main())


Transformations		Events