API reference - Class RdbItem

Notation used in Ruby API documentation

Module: rdb

Description: An item inside the report database

An item is the basic information entity in the RDB. It is associated with a cell and a category. It can be assigned values which encapsulate other objects such as strings and geometrical objects. In addition, items can be assigned an image (i.e. a screenshot image) and tags which are basically boolean flags that can be defined freely.

Public constructors

new RdbItem ptrnewCreates a new object of this class

Public methods

void_createEnsures the C++ object is created
void_destroyExplicitly destroys the object
[const]bool_destroyed?Returns a value indicating whether the object was already destroyed
[const]bool_is_const_object?Returns a value indicating whether the reference is a const reference
void_manageMarks the object as managed by the script side.
void_unmanageMarks the object as no longer owned by the script side.
voidadd_tag(unsigned long tag_id)Adds a tag with the given id to the item
voidadd_value(const RdbItemValue value)Adds a value object to the values of this item
voidadd_value(const DPolygon value)Adds a polygon object to the values of this item
voidadd_value(const DBox value)Adds a box object to the values of this item
voidadd_value(const DEdge value)Adds an edge object to the values of this item
voidadd_value(const DEdgePair value)Adds an edge pair object to the values of this item
voidadd_value(string value)Adds a string object to the values of this item
voidadd_value(double value)Adds a numeric value to the values of this item
voidadd_value(const Shape shape,
const CplxTrans trans)
Adds a geometrical value object from a shape
voidassign(const RdbItem other)Assigns another object to self
[const]unsigned longcategory_idGets the category ID
[const]unsigned longcell_idGets the cell ID
voidclear_valuesRemoves all values from this item
[const]const ReportDatabase ptrdatabaseGets the database object that item is associated with
[const]new RdbItem ptrdupCreates a copy of self
[const,iter]RdbItemValueeach_valueIterates over all values
[const]boolhas_image?Gets a value indicating that the item has an image attached
[const]boolhas_tag?(unsigned long tag_id)Returns a value indicating whether the item has a tag with the given ID
[const]QImageimageGets the attached image as a QImage object
voidimage=(const QImage arg1)Sets the attached image from a QImage object
[const]stringimage_strGets the image associated with this item as a string
voidimage_str=(string image)Sets the image from a string
[const]boolis_visited?Gets a value indicating whether the item was already visited
voidremove_tag(unsigned long tag_id)Remove the tag with the given id from the item
[const]stringtags_strReturns a string listing all tags of this item
voidtags_str=(string tags)Sets the tags from a string

Deprecated methods (protected, public, static, non-static and constructors)

voidcreateUse of this method is deprecated. Use _create instead
voiddestroyUse of this method is deprecated. Use _destroy instead
[const]booldestroyed?Use of this method is deprecated. Use _destroyed? instead
[const]boolis_const_object?Use of this method is deprecated. Use _is_const_object? instead

Detailed description

_create

Signature: void _create

Description: Ensures the C++ object is created

Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created.

_destroy

Signature: void _destroy

Description: Explicitly destroys the object

Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing.

_destroyed?

Signature: [const] bool _destroyed?

Description: Returns a value indicating whether the object was already destroyed

This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself.

_is_const_object?

Signature: [const] bool _is_const_object?

Description: Returns a value indicating whether the reference is a const reference

This method returns true, if self is a const reference. In that case, only const methods may be called on self.

_manage

Signature: void _manage

Description: Marks the object as managed by the script side.

After calling this method on an object, the script side will be responsible for the management of the object. This method may be called if an object is returned from a C++ function and the object is known not to be owned by any C++ instance. If necessary, the script side may delete the object if the script's reference is no longer required.

Usually it's not required to call this method. It has been introduced in version 0.24.

_unmanage

Signature: void _unmanage

Description: Marks the object as no longer owned by the script side.

Calling this method will make this object no longer owned by the script's memory management. Instead, the object must be managed in some other way. Usually this method may be called if it is known that some C++ object holds and manages this object. Technically speaking, this method will turn the script's reference into a weak reference. After the script engine decides to delete the reference, the object itself will still exist. If the object is not managed otherwise, memory leaks will occur.

Usually it's not required to call this method. It has been introduced in version 0.24.

add_tag

Signature: void add_tag (unsigned long tag_id)

Description: Adds a tag with the given id to the item

Each tag can be added once to the item. The tags of an item thus form a set. If a tag with that ID already exists, this method does nothing.

add_value

(1) Signature: void add_value (const RdbItemValue value)

Description: Adds a value object to the values of this item

value:The value to add.

(2) Signature: void add_value (const DPolygon value)

Description: Adds a polygon object to the values of this item

value:The polygon to add.

This method has been introduced in version 0.25 as a convenience method.

(3) Signature: void add_value (const DBox value)

Description: Adds a box object to the values of this item

value:The box to add.

This method has been introduced in version 0.25 as a convenience method.

(4) Signature: void add_value (const DEdge value)

Description: Adds an edge object to the values of this item

value:The edge to add.

This method has been introduced in version 0.25 as a convenience method.

(5) Signature: void add_value (const DEdgePair value)

Description: Adds an edge pair object to the values of this item

value:The edge pair to add.

This method has been introduced in version 0.25 as a convenience method.

(6) Signature: void add_value (string value)

Description: Adds a string object to the values of this item

value:The string to add.

This method has been introduced in version 0.25 as a convenience method.

(7) Signature: void add_value (double value)

Description: Adds a numeric value to the values of this item

value:The value to add.

This method has been introduced in version 0.25 as a convenience method.

(8) Signature: void add_value (const Shape shape, const CplxTrans trans)

Description: Adds a geometrical value object from a shape

value:The shape object from which to take the geometrical object.
trans:The transformation to apply.

The transformation can be used to convert database units to micron units.

This method has been introduced in version 0.25.3.

assign

Signature: void assign (const RdbItem other)

Description: Assigns another object to self

category_id

Signature: [const] unsigned long category_id

Description: Gets the category ID

Returns:The category ID

Returns the ID of the category that this item is associated with.

cell_id

Signature: [const] unsigned long cell_id

Description: Gets the cell ID

Returns:The cell ID

Returns the ID of the cell that this item is associated with.

clear_values

Signature: void clear_values

Description: Removes all values from this item

create

Signature: void create

Description: Ensures the C++ object is created

Use of this method is deprecated. Use _create instead

Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created.

database

Signature: [const] const ReportDatabase ptr database

Description: Gets the database object that item is associated with

This method has been introduced in version 0.23.

destroy

Signature: void destroy

Description: Explicitly destroys the object

Use of this method is deprecated. Use _destroy instead

Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing.

destroyed?

Signature: [const] bool destroyed?

Description: Returns a value indicating whether the object was already destroyed

Use of this method is deprecated. Use _destroyed? instead

This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself.

dup

Signature: [const] new RdbItem ptr dup

Description: Creates a copy of self

Python specific notes:
This method also implements '__copy__' and '__deepcopy__'.

each_value

Signature: [const,iter] RdbItemValue each_value

Description: Iterates over all values

has_image?

Signature: [const] bool has_image?

Description: Gets a value indicating that the item has an image attached

See image_str how to obtain the image.

This method has been introduced in version 0.28.

has_tag?

Signature: [const] bool has_tag? (unsigned long tag_id)

Description: Returns a value indicating whether the item has a tag with the given ID

Returns:True, if the item has a tag with the given ID

image

Signature: [const] QImage image

Description: Gets the attached image as a QImage object

This method has been added in version 0.28.

Python specific notes:
The object exposes a readable attribute 'image'. This is the getter.

image=

Signature: void image= (const QImage arg1)

Description: Sets the attached image from a QImage object

This method has been added in version 0.28.

Python specific notes:
The object exposes a writable attribute 'image'. This is the setter.

image_str

Signature: [const] string image_str

Description: Gets the image associated with this item as a string

Returns:A base64-encoded image file (in PNG format)

Python specific notes:
The object exposes a readable attribute 'image_str'. This is the getter.

image_str=

Signature: void image_str= (string image)

Description: Sets the image from a string

image:A base64-encoded image file (preferably in PNG format)

Python specific notes:
The object exposes a writable attribute 'image_str'. This is the setter.

is_const_object?

Signature: [const] bool is_const_object?

Description: Returns a value indicating whether the reference is a const reference

Use of this method is deprecated. Use _is_const_object? instead

This method returns true, if self is a const reference. In that case, only const methods may be called on self.

is_visited?

Signature: [const] bool is_visited?

Description: Gets a value indicating whether the item was already visited

Returns:True, if the item has been visited already

new

Signature: [static] new RdbItem ptr new

Description: Creates a new object of this class

Python specific notes:
This method is the default initializer of the object.

remove_tag

Signature: void remove_tag (unsigned long tag_id)

Description: Remove the tag with the given id from the item

If a tag with that ID does not exists on this item, this method does nothing.

tags_str

Signature: [const] string tags_str

Description: Returns a string listing all tags of this item

Returns:A comma-separated list of tags

Python specific notes:
The object exposes a readable attribute 'tags_str'. This is the getter.

tags_str=

Signature: void tags_str= (string tags)

Description: Sets the tags from a string

tags:A comma-separated list of tags

Python specific notes:
The object exposes a writable attribute 'tags_str'. This is the setter.